Chương 4 Thông tư 27/2009/TT-BCT: Quản lý, vận hành hệ thống đo đếm điện năng, thu thập và xử lý số liệu

Chapter 4.

MANAGEMENT AND OPERATION OF POWER METERING SYSTEM, DATA GATHERING AND PROCESSING

SECTION 1. INSTALLATION, ACCEPTANCE, REPLACEMENT AND REMOVAL OF DATA METERING AND TRANSMISSION SYSTEM

Article 22. Agreement upon metering point

1. After having the connection agreement, the generating organization shall negotiate and reach an agreement with the power trading organization on metering point and design of the data metering and transmission system and the modes of conversion of metering data.

Where there are metering points placed at the power stations of power grid managing organization, the generating organization must negotiate and reach an agreement with the power trading company and the power grid managing organization.

2. When there is a change or a new metering point, the organization requiring the new metering point must inform and negotiate with the organizations concerned about the metering points and design of the data metering and transmission system and the modes of conversion of metering data.

Article 23. Investment and installation of data metering and transmission system

After the organizations concerned have reached an agreement on metering points, design of data metering and transmission system, the generating organization must inform the electricity system and market operating organization and the metering data managing organization of the agreed contents while the organizations concerned shall carry out the following tasks:

1. The generating organization

a) Purchasing and installing the metering devices, metering system and metering data gathering system at the metering points including the computer in place and devices for data gathering;

b) Ensuring the metering points are in accordance with the agreement between the organizations concerned as stipulated in Clause 1, Article 22 of this Circular;

c) Ensuring the data metering and transmission system in place meets the technical requirements in accordance with the agreed design and the relevant legal normative documents on metering.

d) Signing contract with the experimenting and testing organization to carry out the following tasks:

- Initially experimenting and testing the metering devices, programming and setting up the operational parameters of the metering systems within its scope of management. The experimenting and testing must comply with the procedures and current regulations and have conclusion about the precision of metering devices and system;

- Taking measures of seal or lead seal over the metering devices including the meter, CT, VT, metering circuit, circuit connector, intermediate box to ensure the security of the metering system within its management.

dd) Providing the metering data managing organization with information including the metering points, technical features of metering devices, design of data metering and transmission system and the modes of conversion of metering data.

e) Coordinating with the metering data managing organization to conduct the checking of data metering and gathering system.

2. Power grid managing organization

In case the metering points are placed at the power station of the power grid managing organization, this organization shall cooperate with the generating organization during the installation of metering system; cooperate with the generating organization and the metering data managing organization to conduct the checking of the entire data metering and gathering system.

3. Metering data managing unit

a) Issuing the code of metering point and address code of meters to the newly-installed metering system.

b) Adding the metering database at the center for gathering, processing and storing the metering data of the metering data managing organization in service of management of operation and ensuring the metering data gathering and processing related to the newly-installed metering system;

c) Providing and installing the metering data transmission line from the metering points to the center for gathering and processing of metering data of the metering data managing organization;

d) Coordinating with the generating organization and the power grid managing organization (in case the metering system is placed at the power station of the power grid managing organization) to check the data metering and gathering system, including the data transmission system to the center for gathering and processing of metering data of the metering data managing organization;

dd) Setting up softwares of metering data gathering and processing in the computer in place, encoding the power metering data after they are read and transmitted to the computer in place to ensure the prevention of unauthorized change of metering data before transmitted to the center for gathering, processing and storing of metering data of the metering data managing organization;

Article 24. Acceptance of data metering and transmission system

1. After completion of data metering and transmission system, the generating organization shall send the acceptance plan to the power trading organization, the experimenting and testing organization and the metering data managing organization and the power grid managing organization (in case the metering system is placed at the power station of the power grid managing organization) to request the acceptance and hold the acceptance.

2. The written request for acceptance must be sent to the organizations concerned at least 14 days prior to the acceptance day as planned. In this written request, the organization in charge of the acceptance shall enclose the relevant documents to confirm the data metering and gathering system is installed, tested, sealed or sealed with lead in accordance with regulation and enclose with records of checking and testing under current regulations.

3. Paticipants of acceptance include:

a) Generating organization;

b) Power trading organization;

c) Metering data managing organization;

d) Power grid managing organization (in case the metering system is placed at the power station of the power grid managing organization);

dd) Experimenting and testing organization.

4. During the acceptance of data gathering and metering system, the experimenting and testing organization and the metering data managing organization shall:

a) The experimenting and testing organization

- Provide the metering system operation managing organization and the generating organization (in case the metering system belongs to the power station of the power grid managing organization) and the power trading company with the records of checking and testing and installation of meter and password at level “only read”. Moreover, it is required to determine the security measures and locations of seal and lead seal.

- Providing the metering data managing organization with the password “Time synchronization” and information related to the metering points so that the metering data managing organization can update its metering database management program;

- Storing the records of checking and testing, documents and technical parameters related to the metering equipment and system;

- Storing and securing the password at level “Setup” of the meter and taking responsibility before law for the security of password at level “Installation” and the accuracy of data programmed and installed in the meter;

b) Metering data managing organization

- Provide the metering system operation managing organization, the generating organization (in case the metering system belongs to the power station of the power grid managing organization) and the power trading company with the records of checking and testing of data gathering system;

- Storing records of checking, documents and technical parameters related to the metering data gathering equipment;

5. The system of power metering and data gathering is put into operation only after all organizations participating in the acceptance have signed in the acceptance record.

6. The organization in charge of acceptance shall keep all documents, including: technical materials, testing record and acceptance record of the data metering and transmission while sending a set of document to all organizations concerned.

Article 25. Replacement of metering equipment and set parameters

The change of metering devices and set parameters of the meter or data stored in the meter must comply with the following order:

1. The metering system operation managing organization having devices which need replacement or re-setup of parameters must inform the electricity system and market operating organization, the power trading company, the metering data managing organization and the generating organization. The replacement of metering devices and set parameters must have the agreement between the generating organization and the power trading company. In case the metering system operation managing organization is the power grid managing organization, there must be an agreement between the generating organization, the power trading company and the power grid managing organization.

2. The generating organization is responsible for providing the alternative devices and sign contract with the experimenting and testing organization to carry out the experimenting and testing of alternative devices, checking and re-setting up new parameters while holding the acceptance of metering system after the completion of replacement of equipment or re-installation of metering parameters. The procedures for acceptance are specified in Article 24 of this Circular.

3. The metering data managing organization must update the changed parameters of metering devices into the metering database and program of gathering, processing and storing of metering data in the computer in place and at the center for gathering, processing and storing of metering data.

Article 26. Removal of metering points

1. Where there is one or many power metering points under the management of the generating organization removed due to the change of structure of device connection, change of operational mode, power trading mode or other reasons, the generating organization shall inform in writing the plan for removal of metering points to the electricity system and market operating organization, the power trading organization, the metering data managing organization and the power grid managing organization (in case the metering points which are removed are located in the power station of the power grid managing organization) while reach an agreement with the power trading on the way of calculation of power delivery after the removal of metering points.

The written notice must be sent to the organizations concerned at least 14 days prior to the day of removal of metering points as planned.

2. Participants of removal of metering points:

a) Generating organization;

b) Power trading company;

c) Metering data managing organization;

d) Power grid managing organization (in case the power grid managing organization is the operation managing organization of metering points to be removed);

dd) The experimenting and testing organization (in case the metering system must be checked before the metering points are removed).

3. During the removal of metering points, the organizations involved must perform the following procedures:

a) Closing the meter number at the time of official removal of metering points;

b) Making a written certification of removal of metering points including the information: the removal of metering points done, the official time of removal of metering points, the metering information of such metering points and other contents of work done. The written certification must be sealed and signed by the representatives of organizations concerned;

c) In case of necessity, the organizations may request the checking of working state of the metering system at the time before the removal of metering points.

4. The generating organization shall send the result of removal of metering points and relevant documents to the metering data managing organization to be updated to the database and the program of gathering, processing and storing of metering data in service of operation and billing in the electricity market.

Article 27. Management of metering information

The metering system operation managing organization is responsible for managing information related to the metering system, including:

1. Drawing of identified metering points.

2. As-built drawing of installation outline of metering system.

3. Code and name of metering points, date of application.

4. Parameters and features of meter, CT, VT of the main and backup metering systems, including:

a) Fabrication number of meter, CT, VT;

b) Code of meter, CT, VT;

c) Type of device and model of meter;

d) Transformation ratio of VT, CT, multiples of meter;

dd) Record of meter testing, VT, CT;

e) Record of meter setup;

g) Method of seal, lead seal for meter and metering system;

5. Details of data information connection include:

a) Code of meter address for access to data;

b) Password at level “Only read”;

c) Type of connection device and fabrication number;

6. The metering system operation managing organization shall provide information about metering system with other detailed information for the power trading company and the metering data managing organization to be updated in the database and the program of gathering, processing and storing of metering data in service of operation and billing in the electricity market.

SECTION 2. PROGRAMMING, INSTALLATION AND SECURITY

Article 28. Programming, setup and management of meter password

After installation of meter, the experimenting and testing organization, the metering data managing organization and the metering system operation managing organization where the meter is installed shall carry out the following tasks:

1. The experimenting and testing organization

a) Conducts the programming and setup of working parameter of meter;

b) Sets up, manages and stores passwords at levels: “Only read”, “Time synchronization”, “Setup” with the list of corresponding meters. Takes responsibility before law for the security of password levels;

c) Provides all organizations concerned with password at level “Only read” of the meter;

d) Provides the metering data managing organization with the password at level “Time synchronization” of the meter;

dd) Takes responsibility before the generating organization and law for the security of devices with seal or lead seal.

2. The metering data managing organization

a) Synchronizes time for the meter during the operation and ensures the security of password at level “Time synchronization” provided by the experimenting and testing organization;

b) Takes responsibility before the organizations concerned and the law for the security of password at level “Time synchronization”.

3. The metering system operation managing organization is responsible for securing the password at level “Only read”.

Article 29. Management of seal and lead seal on the meter and the metering system

1. The experimenting and testing organization shall carry out the seal or seal with lead on the meter and other related devices in the metering system before the metering system is put into operation. The seal or seal with lead or removal of seal or seal with lead of the metering system shall be done by the experimenting and testing organization before the presence of the generating organization and the power trading organization.

2. The metering system operation managing organization is responsible for management of metering system to ensure no unauthorized break on the seal or lead seal and takes responsibility before law for the management of seal or lead seal of the meter and the metering system.

3. The experimenting and testing organization shall manage the devices of seal or lead seal to ensure they are used for the right purpose and legally.

Article 30. Management of system of gathering, processing and storing of metering data

The metering data managing organization and the metering system operation managing organization shall take responsibility for managing the system of gathering, processing and storing of metering data as follows:

1. The metering data managing organization

a) Sets up and secures the parameters for the software program of meter data reading on the spot and at the center for data gathering and processing of the metering data managing organization;

b) Sets up and takes measures of security for the data transmission system from the computer in place to the center for data gathering and processing of the metering data managing organization to ensure the accuracy and reliability of the metering data.

2. The metering system operation managing organization

a) Secures the set parameters for the software program of meter data reading within its management;

b) In all cases, the metering system operation managing organization must not interfere in the data reading and transmission program for modification of set parameters and data read from the meter to the computer in place.

SECTION 3. OPERATION OF POWER METERING SYSTEM

Article 31. Responsibility for operation of power metering system

1. The metering system operation managing organization shall manage, monitor the operation, maintenance, replacement of metering systems within its management to ensure the accuracy, stability, reliability and security of the metering systems.

2. During the management of operation, the metering system operation managing organization must regularly monitor and checking the operation condition of the metering systems within its management. In case of unusual detection or breakdown in the metering system, the metering system operation managing organization must inform the metering data managing organization, the power trading company and other organizations concerned for cooperated handling. The process of handling of breakdowns is done as stipulated in Article 35 of this Circular.

3. The replacement of devices and technology applicable to the metering system is done only when there is a negotiation and agreement between the power generating and the power trading company. The replacement of metering devices and set parameters is specified in Article 25 of this Circular.

4. The removal of seal or lead seal on the meter and the metering system is done only by the experimenting and testing organization in case of replacement, testing, experimenting and handling of breakdown of the metering system.

5. The metering data must be gathered, stored in the meters and the system of gathering, processing and storing of metering data every 30 minutes. The timer of meter and data access device are synchronized with the standard time of Vietnam with the error ± 5 seconds. The standard time source is taken from the global positioning system (GPS).

6. The precision of meter and metering devices must be maintained under the correct standard level of devices.

Article 32. Responsibility for preparation of technical standard and procedures for operation of system of metering, gathering and management of metering data

1. The metering data managing organization is responsible for preparation and submission to the Electricity Regulatory Authority for issuance of documents as follows:

a) Procedures for time synchronization;

b) Procedures for checking the metering data;

c) Procedures for identification and estimation of metering data for billing and operation of electricity market;

d) Regulation on technical standard of the metering data transmission system.

2. The metering data managing organization shall cooperate with the power generating organization, the power trading company and the parties concerned during the preparation of such procedures.

Article 33. Periodical and irregular testing of metering system

1. The metering system operation managing organization is in charge of initial testing, acceptance of installation, periodical and irregular testing and handling of breakdown of all devices in the metering system under its management.

2. Periodical testing

a) The periodical testing of metering devices is done by the experimenting and testing organization in accordance with the requirement and cycle defined by the state management organ on metering.

b) The process of testing is done only with the presence of the power generating organization and the power trading organization;

c) The experimenting and testing organization shall prepare and agree with the metering system operation managing organization on the periodical testing plan. The metering system operation managing organization shall inform in writing the periodical testing plan to the power trading organization, the generating organization and the metering data managing organization at least fourteen working days (14) in advance before the day of periodical testing of the metering devices.

Within five (05) working days after receiving the notice of the metering system operation managing organization, the power trading company, the generating organization and the metering data managing organization shall reply in writing about the agreement with the periodical testing plan. In case of no agreement with the estimated periodical testing plan, the parties concerned must give their plausible reasons and propose a new plan;

d) Where the meter and the metering system are not tested periodically in accordance with the provisions in Clause 2 of this Article, the power trading company and the generating organization have the right to refer the case to the Electricity Regulatory Authority for settlement as stipulated in Article 48 of this Circular.

3. Irregular testing

a) The power trading company and the generating organization have the right to request the irregular testing over the meter and the metering system at any time.

b) In case of testing as required by the generating organization: the generating organization must inform the power trading organization, the metering data managing organization and the metering system operation managing organization at least fourteen (14) working days in advance before the estimated testing day and only conducts the task after the power trading company replies in written agreement.

c) In case of testing as required by the power trading company: the power trading company must inform the generating organization, the metering data managing organization and the metering system operation managing organization at least fourteen (14) working days in advance before the estimated testing day and only conducts the task after the generating company replies in written agreement.

d) In case of failure to reach an agreement with the estimated irregular testing plan, the parties concerned must give their plausible reasons.

dd) Where the result of irregular testing indicates that the error of the metering devices within permissible limit, the organization shall require the payment of expenses for the testing. In case the error of the metering devices exceeds the permissible limit, the metering system operation managing organization shall pay the expenses for the irregular testing.

4. Where the result of testing indicates the metering devices have error exceeding the permissible limit, such devices must be corrected, repaired or replaced within the shortest time and must be tested by the experimenting and testing organization before re-used or issued with certificate if replaced by new ones. The metering system operation managing organization shall pay all related expenses.

5. Where the testing result indicates that the metering devices have error exceeding the permissible limit causing discrepancy to the metering data for the billing, the data metering managing organization must cooperate with the organizations concerned to re-determine the correct metering data during the time of error of the metering devices exceeding the permissible limit in service of arrears or refund of electricity charge. The determination of correct metering data must be done under the Procedures for determination and estimation of metering data for the billing and operation of electricity market.

Article 34. Auditing the metering data managing organization

1. Periodical audit

a) Annually, the electricity system and market operating organization shall request the metering data managing organization to sign contract with the metering data auditing organization to conduct the audit of procedures and system of the metering data managing organization, including:

- Checking the entire system of gathering, processing and storing of metering data of the metering data managing organization;

- Checking the procedures, softwares and programs of gathering, processing and storing of metering data to ensure the compliance with requirements of electricity market;

b) The audit expenses shall be born by the metering data managing organization;

2. Irregular audit

a) The generating organizations and the power trading company have the right to request the irregular audit of a part or the whole of operation of the metering data managing organization. The written request shall be sent to the Electricity Regulatory Authority stating the reasons for the irregular audit. When receiving the request from such organizations, the Electricity Regulatory Authority shall consider the necessity and reasonableness of such request. Within 14 working days, the Electricity Regulatory Authority shall issue a written decision on approval or disapproval for the irregular audit over the metering data managing organization.

Where the Electricity Regulatory Authority accepts the request for irregular audit over the metering data managing organization, the Electricity Regulatory Authority shall send the written request to the electricity system and market operating organization to conduct the audit. The request of the Electricity Regulatory Authority must include the contents and scope of auditing work over the metering data managing organization.

b) When receiving the written request for irregular audit from the Electricity Regulatory Authority, the electricity system and market operating organization must sign contract with the metering data managing organization to conduct the irregular audit over the metering data managing organization;

c) The expenses of irregular audit shall be born by the audit requester.

3. The metering data managing organization must fully cooperate to conduct the audit.

4. After the audit, the metering data managing organization and the metering data auditing organization must announce the audit result to the organizations concerned.

5. Where the audit may cause effect on the data gathering of the metering data managing organization, the metering data auditing organization must introduce solutions and reach an agreement with the parties concerned before conducting the audit over the metering data managing organization.

6. Where the result of audit indicates there are mistakes in the gathering, processing and storing of data from the metering data managing organization leading to the incorrect billing of electricity from the metered and used data, the organizations concerned must agree upon the calculation of electricity production for arrears or refund. If the audit detects the mistakes of the metering data managing organization, such organization must take responsibility before the electricity system and market operating organization and before the law for its mistake.

Article 35. Handling of breakdowns of metering system

1. When detecting the failure or malfunction of the metering devices or the metering system, the organization which has detected the case must notify the metering system operation managing organization, the generating organization, the electricity system and market operating organization, the power trading company and the metering data managing organization for cooperated handling. The remedial period of breakdown of metering system from the time of detection must not exceed two (02) days, unless otherwise agreed between the generating organization and the power trading company.

2. The metering system operation managing organization shall take charge of and cooperate with the organizations concerned in settlement of metering breakdowns.

3. In any case, except for emergency specified in Clause 4 of this Article, the process of handling the breakdown must have the participation and witness of the generating organization and the power trading company. The handling of breakdown must be recorded and signed by the participants. The record must be signed and sealed by the competent representatives of the organizations concerned.

4. In case of emergency, upon occurrence of breakdown for the metering system possibly causing danger to people or devices, the metering system operation managing organization is permitted to handle the breakdown but must notify immediately the power trading company, the generating organization, the electricity system and market operating organization and the metering data managing organization and record in detail the information on the breakdown and the remedial measures such as: the time and state of breakdown, time of remedy, meter number at the times of breakdown and after recovery. The record must be signed and sealed by the competent representative of the metering system operation managing organization. After that, the metering system operation managing organization must inform immediately the power trading company, the generating organization, the metering data managing organization and other organizations concerned in order to perform the procedures for seal and lead seal and estimate the metering data in case of necessity.

5. Where the meter or the metering system is broken down leading to the incorrectness of the data metered and gathered to the center for gathering, processing and storing of data of the metering data managing organization, within the shortest time, the metering data managing organization must determine the correct power production during the time of breakdown of the meter and the power metering system in service of operation of electricity market, billing, arrears or refund of paid electricity charge. The correct power data must be updated in the metering database and sent to the electricity system and market operating organization for update of input database of the billing software and publication on the website of the electricity market.

6. Where the breakdown of the metering system leads to the failure to determine the correct metering data, the matering data managing organization must estimate the metering data as a basis for billing of electricity charge during the breakdown. The estimation of metering data must be done by the procedures for determination and estimation of metering data for the billing and operation of electricity market.

7. The record of calculation and certification of estimated power production or power with the arrears or refund must be signed and sealed by the competent representative of the generating unit and the power trading company.

8. Where the organizations concerned do not accept the result of estimated power production or power with the arrears or refund, such organizations may submit the case to the Electricity Regulatory Authority for settlement under the provisions of Article 48 of this Circular.

9. Where the metering devices are broken down, the metering system operation managing organization is responsible for replacement or repair in the shortest time so that such devices meet the technical requirements and are put into normal operation. The replacement or repair must comply with the provisions in Article 25 of this Circular. To handle the breakdown of meter in a timely manner, the metering system operation managing organization must have backup meter available for all types which are being installed. These meters must be tested beforehand and preserved in accordance with the prescribed technical requirements.

10. The metering system operation managing organization is responsible for notifying the metering data managing organization and the electricity system and market operating organization of the process of handling the breakdown of metering system. The metering system operation managing organization, the metering system managing organization, the metering data managing organization, the electricity system and market operating organization must retain information on all breakdowns and process of breakdown settlement.

Article 36. Handling of breakdown of system of gathering, processing and storing of metering data

1. During the management of operation, monitoring and checking of system of gathering, processing and storing of metering data, any organization detecting error or breakdown of the system of reading and transmission of data leading to the failure to access data from a distance, such organization must notify the metering data managing organization for immediate handling or settlement. As soon as receiving the information, the metering data managing organization shall contact the parties concerned including the metering system operation managing organization, the generating organization, the power trading organization and the electricity system and market operating organization must promptly check and detect errors and take remedial measures in a timely manner.

2. After the checking is done, if the errors are detected at any stage, the organization in charge of such stage must promptly handle and remedy to restore the operational condition of the system of gathering and processing of metering data in a shortest time.

3. After the system of gathering and processing of metering data is recovered, the metering system operation managing organization and the metering data managing organization shall carry out the connection with the center for gathering, processing and storing of data of the metering data managing organization to additionally read the missing data during the failure of data reading system.

4. If the errors cannot be promptly handled, the metering system operation managing organization is responsible for gathering direct meter data on the spot through the interface portal of meter and using appropriate measures (e-mail, fax…) to transmit data to the metering data managing organization for update in the common metering database of the entire system.

5. If the system of gathering, processing and storing of metering data has errors or breakdown which leads to the failure of reading number of meter or wrong reading, the metering data managing organization must cooperate with the organizations concerned to gather correct data for the arrears or refund. The correct metering data must be updated in the metering database and sent to the the electricity system and market operating organization for update of input data of the billing software.