Chương 5 Thông tư 27/2009/TT-BCT: Giao nhận điện năng

Chapter 5.

POWER DELIVERY

SECTION 1. GATHERING AND MANAGEMENT OF METERING DATA

Article 37. Purpose for gathering of metering data

1. Preparing the billing for the generating organization and power trading company

2. Calculating and announcing the power production of the generating organizations in service of electricity market.

3. Analyzing and balancing the supply and demand of power and use for other purposes in service of power system operation.

4. Managing the power generated and consumed of the generating organizations and organizations owning and operating the power contribution grid, the power delivered and lost on the transmission grid and comparing the result of main metering with the backup metering.

5. Providing the metering data for the members participating in the electricity market and the organizations concerned in service of calculation of power loss, handling of metering breakdown, data replacement and settlement of dispute over power.

Article 38. Decentralization of gathering, management and storing of metering data

1. The metering system operation managing organization is responsible for managing the operation of system of gathering and processing of meter data to ensure the adequate and correct update of data from the meter under its management to the computer in place.

2. The metering data managing organization is responsible for managing and operating the power metering database and program of gathering, processing and storing of metering data and ensuring the completeness, accuracy, reliability and security, from the communication port of the devices used for data gathering to the metering data managing organization and from such organization to the electricity system and market operating organization. The power metering data gathered must be stored at least 5 years.

Article 39. Access permission and use of metering data related to the billing in the electricity market

1. The metering data managing organization shall set up, administer system, update, check and secure database and the program of gathering, processing and storing the power metering data for trading, billing and operation of electricity market.

2. The electricity system and market operating organization has the right to access and use the database and the program of aggregation of power trading and billing data of generating organization.

3. The metering system operation managing organization has the right to access and use the metering data within its management.

Article 40. Reading and transmission of metering data

1. Mode of data reading

a) The data reading of meters to the metering data managing organization must be done daily with two parallel and independent modes:

- Mode 1: The metering system operation managing organization shall read data of meters within its management to the computer in place. After that, these data shall be transmitted automatically to the metering data managing organization;

- Mode 2: The metering data managing organization shall make direct connection to the meters of the metering system operation managing organization to read data and synchronize time of all meters;

b) The process of data reading and time synchronization must be done daily by the metering system operation managing organization and the metering data managing organization and all metering data of the previous day must be updated to the metering data managing organization before 10:00 AM of the following day. The metering data managing organization shall cooperate with the metering system operation managing organization to schedule the data reading of meter to ensure the access to metering data is not blocked;

c) The metering data operation managing organization shall daily check and monitor the data reading system in place to ensure the data of meters of power plants are transmitted fully and accurately to the computer in place and to the metering data managing organization. The metering system operation managing organization must inform immediately the metering data managing organization of information about the failure to read or transmit the metering data, including the case where the metering data are sent late and cause of breakdown of system of metering data gathering and transmission within its management.

d) Everyday, the metering data managing organization shall check the compleness and correctness of the metering data of the previous day gathered from the metering data operation managing organization, process these data and transmit the power metering data to the electricity system and market operating organization before 15:00 PM for the operation of electricity market. The checking of metering data of the metering data is specified in Article 41 of this Circular.

2. Requirements for gathering of metering data

The metering data read to the computer in place and transmitted to the center for gathering, processing and storing of metering data of the metering data managing organization must include:

a) The data read daily include the value of active and reactive power by two ways of receiving and sending for every 30 minutes of all main and backup meters.

b) Data read under the billing cycle includes the number closed at 24:00 PM of the last day of billing cycle on the main register and the tariff of the active and reactive power register by two ways of receiving and sending of all main and backup meters of the generating organization.

SECTION 2. PROCESSING OF METERING DATA

Article 41. Checking of metering data

1. The purpose of checking of metering data is for confirmation of precision and consistence between the metering database stored at the metering data managing organization with the metering data stored in the meter of the generating organization as a basis for preparing invoice for the purpose of billing of electricity charge.

2. The metering data managing organization shall check the metering data gathered at the center for gathering, processing and storing of data of the metering data managing organization to ensure the accuracy and validity of the metering data.

3. The checking and comparison of metering data is done under the Procedures for checking of metering data and is based on the following principles:

a) The metering data of backup meter of the generating organization shall be used for comparison with data of the main meter of the generating organization as a basis for confirming that the metering systems at the generating organization ensure the accuracy and reliability.

b) The data of meters read and transmitted by the generating organizations to the metering data managing organization shall be compared with the main data of such meters connected for direc data metering by the metering data managing organization as a basis for confirming the data is correct and reliable;

c) The power data in each billing cycle of meters determined from the total of power for a cycle of every 30 minutes of the days in the billing cycle shall be compared with the power production of such meters in the entire billing cycle determined from the number of meter closing at the time of 0:00 of the first day and 24:00 of the last day of such billing cycle.

4. Where the metering data managing organization detects the abnormality or suspects the accuracy of the gathered metering data, the metering data managing organization must investigate and settle such problems in the shortest time.

5. Where the result of checking and comparison of metering data detects the difference between the meter data with data in the computer in place or the data in the metering database of the metering data managing organization:

a) The organizations concerned including the generating organization, the metering data managing organization and the power trading company must coordinate to find out the cause and reach an agreement upon the settlement plan;

b) The data stored in the meter shall be the main ground and basis for determining the power through the metering points.

6. Within 06 days from the date the metering data of power trading is published on the website of the electricity market, the generating organization and the power trading company shall check and compare the metering data. If disagreeing with the data, such organizations may request the metering data managing organization to re-check to confirm the correctness of the data provided or detect causes and handle the differences of metering data (if any);

7. In case the generating organization and the power trading organization do not agree upon the metering data in service of billing, such organizations have the right to submit this case to the Electricity Regulatory Authority for settlement in accordance with the provisions in Article 48 of this Circular.

8. Where the valid metering data cannot be gathered before the deadline to be provided for the electricity system and market operating organization and the parties concerned, the metering data managing organization shall estimate the metering data for the billing and operation of electricity market. The estimation of metering data and procedures for calculating the power arrears or refund is specified in Article 44 of this Circular.

Article 42. Calculation and conversion of metering data

1. Cases of calculation and conversion of metering data:

a) Conversion of metering data of the main metering system and the backup metering systems to the terminal of generating units for the following purposes:

- Determining the marginal price of electricity market;

- Separating the power which is dispatched according to the schedule of electricity market (billing at market price) and the power which is dispatched under the binding condition to generate electricity (paid at the offering price of generating units) in the transaction cycles of electricity market when one or a number of generating units of the generating organization are dispatched under the binding condition to generate electricity.

The method of determining the marginal price of the electricity market and the regulations related to the handling of binding generation specified in the Regulation on electricity market;

b) Converting the metering data of the main metering system and backup metering systems to the connection point in case the metering points do not coincide with the connection points.

c) Calculating the power traded and transmitted through the connection points in case the metering point does not ensure the correct metering of traded power as in case the metering points are established in the direction high and medium voltage of the 3 phase booster transformer.

2. In cases specified in Clause 1 of this Article, the generating organization and the power trading company must agree upon the mode of calculation and conversion of metering data. The mode of calculation and conversion of metering data which has been agreed upon must be sent to the metering data managing organization for application in the program of gathering and processing of metering data of the metering data managing organization.

Article 43. Calculation and format of metering data for power trading

The data and format of data of the metering production for billing in the competitive generation market in accordance with the Regulation on electricity market. The metering data managing organization shall calculate the metering power production for billing in the generation market based on the gathered metering data and the mode of calculation of converted power specified in Article 42 of this Circular.

Article 44. Estimation of metering data

1. Where the correct metering data of the previous day cannot be gathered as stipulated at Point b, Clause 1, Article 40 of this Circular, the metering data managing organization must estimate the metering data to be provided for the electricity system and market operating organization in service of operation of electricity market and billing of electricity charge.

2. The estimation must be done in accordance with the Regulation on determination and estimation of metering data for the billing and operation of electricity market which the metering data managing organization develops and is approved by the Electricity Regulatory Authority.

3. The metering data managing organization must notify the electricity system and market operating organization of the cases of application of estimated metering data and the value of estimated power production at the time of supply of metering data.

4. After estimating the power metering data, the organizations concerned must takes measures to gather the correct metering data as a basis for the arrears or refund for the cycles applying the estimation of power metering data.

5. Where the correct metering data cannot be determined, the estimated metering data can be used as a basis for the billing between the organization.

SECTION 3. DETERMINATION OF METER NUMBER AND POWER DATA FOR BILLING

Article 45. Reading the meter number and confirming the power production by the closed meter number

1. On the first day of each billing cycle, the generating organization shall cooperate with the power trading company or the authorized organization of the power trading company to close the number and confirm the power production of the preceding billing cycle in the main and backup metering systems. The meter number is closed at 24:00 PM on the last day of the previous billing cycle.

2. The meter number and the power production of each metering system must be specified in the Record of confirmation of meter number and power production which is certified by the competent representative of the generating organization and the power trading company with the seal and signature of competent representatives of both organizations.

3. Within two (02) days from the first day of each billing cycle, the generating organization shall send the Record of confirmation of meter number and power production to the metering data managing organization for checking, comparison and to the electricity system and market operating organization for update in the billing documents.

Article 46. Responsibility for data certification by the meter data reading program

1. After receiving the Record of confirmation of meter number and power production, the metering data managing organization shall prepare the Record of aggregation of power production for every hour for each metering point of the generating organizations based on the metering data gathered from the program of aggregation of metering data of the system of gathering, processing and storing of metering data. The Record of aggregation of power production must be checked and compared its data by the measures specified in Article 41 of this Circular and ensure the accuracy and consistence with the power production which is determined by the Record of certification of meter number and power production done by the generating organization and the power trading company.

2. The Record of aggregation of power production for every hour of each generating organization must be signed by the competent representative of the generating organization, the power trading company and the metering data managing organization. Before the 8^th working day of each billing cycle, the metering data managing organization shall send the above Record to the electricity system and market operating organization as a basis and legal documents for the billing between the generating organization and the power trading company.

Article 47. Dossier for determination of power production for billing in electricity market

1. The dossier for determination of power production for billing in electricity market includes the Records of power certification between organizations as specified in Article 45 and 46 of this Circular and is a part of billing documents of the generating organizations and other members involved in the electricity market.

2. The electricity system and market operating organization must store the dossier for determination of power production for billing within five (05) years.