Chương V Thông tư 30/2014/TT-BCT: Vận hành thị trường điện

Chapter V

OPERATION OF ELECTRICITY MARKET

Section: OPERATION OF ELECTRICITY MARKET FOR NEXT DAY

Article 41. Information for operation of electricity market for next day

Before 10:00 am of day D-1, The electricity system and market operating Unit shall determine, calculate and announce the following information:

1. Chart of load forecasting of day D of the entire national electricity system and the North, Central and South.

2. Estimated output in each transaction cycle of next day of multi-objective strategic hydropower plants, BOT power plants and other power plants not directly offering price in the electricity market.

3. Total estimated gas output of next day of gas thermal power plants using the same gas source.

4. Estimated imported and exported power output in each transaction cycle of day D.

5. The results of assessment of short-term system security for day D as per the provisions in the Regulation on power transmission system issued by the Ministry of Industry and Trade.

6. Estimated output of hydropower plants having reservoir with regulation capability of less than 02 days in each transaction cycle of next day.

7. Estimated output of hydropower plants violating the weekly limited water level which the electricity system and market operating Unit calculates and sets the mobilization schedule in each transaction cycle of next day.

Article 42. Price quotation

1. The price quotation is specified in Annex 3 of this Circular and must comply with the following principles:

a) Having a maximum of 05 (five) pairs of offered price (dong/kWh) and capacity (MW) for the set for each transaction cycle of day D ;

b) Capacity in the price quotation is the capacity at the terminal of generator;

c) Offered capacity of succeeding price band must be lower than the capacity of preceding price band. The minimum offering step is 03 (three) MW;

d) Having information on the technical parameters of the set, including:

- The announced capacity of the set for day D;

- The lowest stable generated capacity of the set;

- The speed of increase and decrease of maxium capacity of the set;

- The technical constraint upon simultaneous operation of genereating sets.

dd) The announced capacity of the set in the quotation of day D is not lower than the announced capacity in day D-2 under the Procedures for short and medium-term assessment of electricity system security issued by the Electricity Regulatory Authority on the implementation of Regulation on power transmission system issued by the Ministry of Industry and Trade except for case of stop of set for unplanned repair (which must be approved) or unforeseen technical incidents. The plant shall update the announced capacity upon decrease in available capacity;

e) In normal condition, the first price capacity band in the quotation of thermoelectric sets must be equal to the lowest stable generated capacity of the set. The last price capacity band must be equal to the announced capacity. For thermal power plants which may update the hourly quotation with capacity lower than the lowest stable generated capacity during the start and stop of set.

g) Hydropower plants may offer the first capacity bands in each hour by 0 (zero) MW. For hydropower plants with regulation capability over 02 days, the last price capacity band must be equal to the announced capacity;

h) Unit of offered price is dong/kWh with the smallest decimal as 0.1;

i) Offered price is between the price floor and price ceiling of the set and shall not decrease in the direction of increase of offered capacity.

2. Modification of price quotation

a) The price offering Units may modify and submit the price quotation for next day or for the remaining transaction cycles in day D to the electricity system and market operating Unit at least 45 minutes before transaction cycle with modified price quotation;

b) The modified price quotation whose offered price must not be changed compared with the price quotation for next day of such price offering Units;

c) The modified price quotation whose capacity must not be changed at capacity levels lower than or equal to the announced capacity for next hour except in case of violation of technical requirements of price quotation;

d) The modified price quotation with increased capacity is only used as scheduling quotation for next hour in case of warning of shortage of capacity;

dd) The electricity system and market operating Unit shall check the validity of the modified price quotations and use them as the scheduling price quotation for mobilization scheduling of next hour and calculation of electricity market price.

Article 43. Price offer of group of ladder hydropower plants

1. The group of ladder hydropower plants shall offer price as per a price quotation for the whole group and comply with the limit of offered price specified in Article 40 of this Circular.

2. The power plants in the group of ladder hydropower plants shall agree and uniformly appoint the representative price offering Units. Such Units shall submit the written registration together with the written agreement between power plants in the group to the electricity system and market operating Unit.

3. Where the representative price offering Unit is not registered for the group of ladder hydropower plants, the electricity system and market operating Unit shall announce the mobilization chart to the plants of such group based on the result of calculation of water value of such group.

4. The representative price offering Unit must comply with regulations on price offering for all power plants in the group of ladder hydropower plants.

5. Where the hydropower plant in the group of ladder hydropower plants proposes self price offering, based on such proposal and the optimal constraints of water use of the entire group, the Electricity Regulatory Authority shall consider and decide the price offering of such hydropower plant.

6. The water value of group of ladder hydropower plants is the water value of the largest reservoir in such group. The electricity system and market operating Unit shall determine the reservoir used to calculate the water value for the group of ladder hydropower plants together with classification of hydropower plants specified in Article 18 of this Circular.

7. Where there is multi-objective strategic hydropower plant in the group of ladder hydropower plants:

a) The electricity system and market operating Unit shall announce the hourly generated output in next week of each power plant in the group of ladder hydropower plants under the provisions in Clause 2, Article 28 of this Circular;

b) When the announced output of multi-objective strategic hydropower plant in the group is adjusted under the provisions in Article 54 of this Circular, the electricity system and market operating Unit must adjust the announced output of hydropower plants in the lower ladder accordingly.

Article 44. Price offer of other hydropower plants

1. The other hydropower plants having reservoirs with regulation capability from 02 days or more make their price offer in the market and comply with the limit of offered price specified in Article 40 of this Circular.

2. The other hydropower plants having reservoirs with regulation capability of less than 02 days must submit the price quotation of day D to the electricity system and market operating Unit. The quotation of such plants is specified as follows:

a) The offered price is 0 dong/kWh for all price bands;

b) The offered capacity is equal to the estimated generation capacity of generating set in the transaction cycle.

Article 45. Submission of price quotation

1. Before 11:30 am of day D-1, the price offering Units must submit the price quotation of day D.

2. The price offering Units shall submit their price quotation through the market information system. In case of failure to use the market information system due to incidents, the price offering price shall reach an agreement with the electricity system and market operating Unit on other modes for submission of price quotation in the priority order as follows:

a) By email to the address specified by the electricity system and market operating Unit;

b) By fax to the number specified by the electricity system and market operating Unit;

c) Submitting the quotation directly at the head office of the electricity system and market operating Unit.

Article 46. Checking the validity of price quotation

1. Before 11:00 of day D-1, the electricity system and market operating Unit shall check the validity of the price quotation which it has received from the price offering Units under the provisions of Article 42 of this Circular. Where the price offering Unit sends many price quotations, only the last one shall be reviewed.

2. Where the price quotation is not valid, the electricity system and market operating Unit shall inform the Units submitting such price quotation and request such Units to re-submit the last price quotation before the end time of price offering.

3. After receiving the notification from the electricity system and market operating Unit of the invalid price quotation, the price offering Units shall modify and re-submit the price quotation before the end time of price offering.

Article 47. Scheduling price quotation

1. After the end time of price offering, the electricity system and market operating Unit shall check the validity of the last price quotation it has received under the provisions in Article 42 of this Circular. The last valid price quotation shall be used as the scheduling price quotation for mobilization scheduling for next day.

2. Where the electricity system and market operating Unit does not receive the price quotation or the last price quotation of the price offering Unit is not valid, the electricity system and market operating Unit shall use the default price quotation of such electricity generating Units as the scheduling price quotation.

3. The default price quotation of power plants is determined as follows:

a) For thermal power plants, the default price quotation is the last valid price quotation. In case the last valid price quotation is not consistent with the actual state of operation of the set, the default price quotation is the one corresponding to the present state and fuel used in the set of default price quotation applied to such month of the set. The price offering Units shall prepare the set of default price quotation applied to next month of the thermoelectric set corresponding to the state of operation and fuel of the set and submit it to the electricity system and market operating Unit before the 25^th date of each month.

b) For the hydropower plants and group of ladder hydropower plants, the default price quotation is the quotation with offered price equal to the corresponding price ceiling of the hydropower plant specifed in Article 40 of this Circular.

Article 48. Data used for mobilization scheduling for next day

The electricity system and market operating Unit must use the following data to set up the mobilization scheduling for next day:

1. Daily load chart of the entire national electricity system and each region of the North, Central and South

2. Scheduling price quotations of price offering Units

3. Estimated output in each transaction cycle of next day of power plants specified in Clause 2, Article 41, Clause 7, Article 43 and Point b, Clause 2, Article 44 of this Circular.

4. Imported and exported power output specified in Article 62 and 63 of this Circular.

5. Capacity of generating sets of power plants providing the auxiliary services.

6. Requirements on spinning backup capacity and frequency modulation.

7. Schedule of maintenance and repair of transmission grid and generating sets which the electricity system and market operating Unit has approved.

8. Testing schedule of generating set.

9. Mobilization chart of power plants whose right to participate in the electricity market is suspended under the provisions of Clause 3, Article 8 of this Circular.

10. The results of assessment of short-term system security for day D under the provisions in the Regulation on power transmission system issued by the Ministry of Industry and Trade.

11. Updated information about the availability of the transmission grid and the generating sets from the SCADA system or provided by the electricity transmitting Units or electricity generating Units.

Article 49. Mobilization scheduling for next day

The electricity system and market operating Unit shall set up the mobilization scheduling for next day. The schedule for next day includes:

1. Unconstrained mobilization schedule, including:

a) Estimated price of market power in each transaction cycle of next day;

b) Mobilization order of generating sets in each transaction cycles of next day.

2. Constrained mobilization schedule, including:

a) Estimated mobilization chart of each set in each transaction cycle of next day, marginal price of each region in each transaction cycle of next day.

b) Estimated schedule of stop, start and state of grid connection of each set in next day;

c) Estimated mode of operation and wiring diagram of electricity system in each transaction cycle of next day.

d) Warning information (if any).

3. Setup of mobilization schedule in case of excessive capacity

The electricity system and market operating Unit shall calculate the reduction in capacity towards the lowest stable generated capacity or stop and change of restarting time of generating sets in case of excessive capacity under the following principles:

a) Reduction in capacity of generating sets with price of electricity sale contract in the order from high to low;

b) Stop of generating sets with price of electricity sale contract (Pc) in the order from high to low;

c) Stop of generating sets with starting cost from low to high;

d) Upon restart in the order of generating sets having price of electricity sale contract (Pc) in the order from low to high;

dd) Calculation of stopping time of generating sets to meet the requirements of the system and limit of up and down operation of generating sets with multi times.

Article 50. Announcement of mobilization schedule for next day

Before 16:00 pm  everyday, the electricity system and market operating Unit shall announce information in mobilization schedule for next day, specifically as follows:

1. Estimated mobilization capacity includes the spinning backup capacity and frequency modulation of generating sets in each transaction cycle of next day. The marginal price of each region in each transaction cycle of next day.

2. Estimated market power price for each transaction cycle of next day.

3. List of generating sets expected to increasingly or decreasingly generate capacity in each transaction cycle of next day.

4. Information on warning of shortage of capacity in next day (if any), including:

a) Estimated transaction cycles with shortage of capacity;

b) Amount of insufficient capacity;

c) Violation of constraints of system security

5. Information on warning of excessive capacity (if any) in next day, including:

a) Estimated transaction cycles with excessive capacity;

b) Generating sets whose electricity generation is expected to be stopped.

Article 51. Grid connection of generating set

1. For slowly-started generating set, the electricity generating Units shall prepare everything for grid connection of such generating set as per the mobilization schedule for next day which the electricity system and market operating Unit has announced. Where the start time of generating set is greater than 24 hours, the electricity generating Units shall connect the grid of such generating set based on the results of assessment of short-term system security which the electricity system and market operating Unit has announced.

2. For the generating set without slow start, the electricity generating Units shall prepare everything for grid connection of such generating set as per the mobilization schedule for next day which the electricity system and market operating Unit has announced.

3. During the grid connection of thermoelectric sets, the electricity generating Units shall update the hourly capacity into the hourly quotation 60 minutes in advance before transaction cycle for the operation and calculation of payment.

Article 52. Handling in case of warning of capacity shortage

1. The electricity system and market operating Unit may change the announced capacity of multi-objective strategic hydropower plants under the provisions in Clause 2, Article 54 of this Circular.

2. The electricity system and market operating Unit shall use the quotation of increased capacity as the scheduling quotation for mobilization scheduling for next hour and calculation of electricity market price.

Section 2: OPERATION OF ELECTRICITY MARKET FOR NEXT HOUR

Article 53. Data of mobilization scheduling for next hour

The electricity system and market operating Unit shall use the following data for mobilization scheduling for next hour

1. The load chart of entire national electricity system and the North, Central and South forecasting the next 3 hours and 03 following hours.

2. The grid connection plan of slowly-started generating sets as per the announced mobilization schedule for next day.

3. The scheduling quotations of the price offering Units with updating of hourly quotation of slowly-started generating sets during grid connection, hourly quotation of generating sets during the stop of generating set due to incident or reduced capacity due to unforeseen technical incident, the hourly quotation of generating sets announcing the increased capacity in case of current source shortage of electricity system. The Units may update the hourly quotation at least 45 minutes prior to transaction cycle.

4. Announced output of multi-objective strategic hydropower plant.

5. Spinning backup capacity and frequency modulation, quick start backup, cod backup and operation to be generated due to the constrained security of electricity system for next hour.

6. Availability of transmission grid and generating sets from SCADA system or provided by the electricity transmitting Units and the electricity generating Units.

7. Other constraints of system security.

8. Testing schedule of generating set.

9. Capacity announced as per the mobilization schedule for next day of power plants which do not offer price directly in the electricity market.

10. Imported power output .

Article 54. Adjustment of announced output of multi-objective strategic hydropower plant

1. Before mobilization scheduling for next hour, the electricity system and market operating Unit may adjust the hourly output of the multi-objective strategic hydropower plant announced under the provisions in Clause 2, Article 41 of this Circular in the following cases:

a) Unexpected changes in hydrology;

b) Warning of capacity shortage as per the mobilization schedule for next day;

c) Decision of competent state authorities on regulation of reservoir of multi-objective strategic hydropower plant for the purpose of flood control and irrigation.

2. Scope of adjustment of hourly output of multi-objective strategic hydropower plant in the cases specified under Point a and b, Clause 1 of this Article is ±5% of total installed capacity of multi-objective strategic hydropower plants in the electricity system excluding the capacity for frequency modulation and spinning backup.

Article 55. Mobilization scheduling for next hour

1. The electricity system and market operating Unit shall set up the mobilization schedule for next hour for generating sets by the method of constrained and unconstrained scheduling.

2. Mobilization scheduling for next hour in case of capacity shortage

a) The electricity system and market operating Unit sets up the mobilization schedule of generating sets in the order as follows:

- As per the scheduling price quotation;

- Multi-objective strategic hydropower plants as per the adjusted capacity;

- Generating sets providing the quick and cold start backup services as per the mobilization schedule for next day;

- Generating sets providing the generation operation services due to the constrained security of electricity system;

- Spinning backup capacity;

- Reduction in frequency modulation backup capacity to the permissible lowest level.

b) The electricity system and market operating Unit shall check and determine the expected capacity shedding to ensure the system security.

3. Mobilization scheduling for next hour in case of excessive capacity

The electricity system and market operating Unit shall adjust the mobilization scheduling for next hour through the methods in the order as follows

a) Stopping the generating sets voluntarily stopping their electrical generation;

b) Gradually reducing the generated capacity of slowly-started generating sets to the lowest stable generated capacity;

c) Reducing to a minimum of generated capacity of generating set providing the spinning backup services;

d) Reducing to a minimum of generated capacity of generating set providing the frequency modulation services ;

dd) Stopping the slowly-started generating sets in the order as follow:

- Having the shortes start time;

- Having the price of electricity sale contract (Pc) from high to low;

- Having start cost from low to high. The start cost shall be negotiated by the single wholesaling Units  with the electricity system and market operating Unit.

- Having the lowest capacity level sufficiently to deal with the excessive capacity.

Article 56. Announcement of mobilization schedule for next hour

The electricity system and market operating Unit shall announce the mobilization schedule for next hour 15 minutes prior to the transaction cycle, including the following contents:

1. Forecast load for next hour of the entire national electricity system and in the North, Central and South.

2. Mobilization schedule of generating sets, marginal cost in the North, Central and South in next  hour and 03 consecutive hours scheduled under the provisions in Article 55 of this Circular.

3. Handling measures of the electricity system and market operating Unit in case of capacity excess or shortage.

4. Information about adjustment of announced capacity of multi-objective strategic hydropower plants under the provisions in Article 54 of this Circular.

5. Estimated schedule of load shedding (if any).

Section 3: REAL TIME OPERATION

Article 57. Dispatching real time electricity system

1. The electricity system and market operating Unit shall operate the electricity system in real time based on the announced mobilization schedule for next hour and comply with the provisions on operation of real time electricity system in the Regulation on power transmission system issued by the Ministry of Industry and Trade.

2. The electricity generating Units must comply with the dispatching order of the electricity system and market operating Unit.

3. The electricity generating Units owning the hydropower plants must comply with the provisions on weekly limited water level specified in Article 38 of this Circular.

Article 58. Handling in case of violation of weekly limited water level of hydropower plants

1. The electricity system and market operating Unit shall warn of violation of weekly limited water level of plants. The plants must adjust the offered price in the next days to ensure no further violation of weekly limited water level.

2. Where the reservoir of power plant commits the weekly limited water level for 02 consecutive weeks, from 12:00 pm of Monday of the next week, the quotation of such power plant shall not be used for mobilization scheduling. The electricity system and market operating Unit shall intervene in the mobilization schedule of such power plants based on the result of calculation of water value to ensure the requirements on security of electricity system and bring the water level of reservoir to the weekly limited water level.

Where the water level of reservoir is completely violated due to the mobilization on the basis of price quotation of the power plant, not due to mobilization to ensure the requirements on security of electricity system, within the time of being intervened, such plants shall be paid by 90% of the price of electricity sale contract but not exceeding 02 weeks from the time of intervention.

Where the water level of reservoir is violated due to mobilization to ensure the security of electricity system, such plants are paid at the price of electricity sale contract during the time of intervention.

3. After 02 week from the intervention of the electricity system and market operating Unit, the water level of reservoir still violates the weekly limited water level due to hydrological conditions or mobilization of power plant to ensure the requirements on security of electricity system, the electricity system and market operating Unit may continue its intervention in the mobilization schedule of power plants. During this time, the power plant is paid at the price of electricity sale contract.

4. When ensuring no violation of weekly limited water level, the hydropower plant may continue its participation in the price offering in the next week.

5. Before 10:00 am of Mondays, the electricity system and market operating Unit must announce the mobilization scheduling from Tuesdays to the electricity generating Units and the single wholesaling Units  in the following cases:

a) The power plants violates its water level of reservoir and the power plants whose mobilization schedule is intervened;

b) The water level of power plant is back to the weekly limited water level and such power plant may offer its price again.

6. Before 10:00 am of day D-1, based on the hydrological condition and water level of reservoir of such hydropower plant, the electricity system and market operating Unit shall calculate and announce the output expected to be mobilized hourly in next day of power plant with intervention in mobilization schedule on the following principles:

a) Ensuring the security of power supply and constraints on requirement for downstream water use and other technical constraints.

b) Ensuring the minimization of power purchase costs for the entire system.

Article 59. Intervention in electricity system

1. The electricity system and market operating Unit may intervene in the electricity market in the following cases:

a) The system is operating in emergency mode specified in Regulation on power transmission system issued by the Ministry of Industry and Trade.

b) Failing to present the mobilization schedule for next hour 15 minutes prior to operational time.

2. In case of intervention in electricity market, the electricity system and market operating Unit shall mobilize the generating sets to ensure the objectives in the order as follows:

a) Ensuring the balance of generated capacity and load;

b) Meeting the requirements on frequency modulation backup;

c) Meeting the requirements on spinning backup;

d) Meeting the requirements on voltage quality;

3. Announcing information on electricity market

a) When intervening in the electricity market, the electricity system and market operating Unit must announce the following contents:

- The reasons for intervention in electricity market;

- Transaction cycles with expected intervention in the electricity market.

b) Within 24 hours after after the end of intervention in electricity market, the electricity system and market operating Unit shall announce the following contents:

- The reasons for intervention in the electricity market;

- The transaction cycles with intervention in the electricity market;

- The measures which the electricity system and market operating Unit applies for intervention in the electricity market;

Article 60. Stop of electricity market

1. The electricity market stop operation upon occurrence of one of the following cases:

a) Due to disaster emergency situations or protection of national security;

b) The electricity system and market operating Unit requires the stop of electricity market in one of the following cases:

- The electricity system is operating in an extreme emergency mode specified in the Regulation on power transmission system issued by the Ministry of Industry and Trade.

- Failure to ensure the operation of electricity market safely and continuously.

c) Other cases as required by the competent authorities.

2. The Electricity Regulatory Authority shall consider and decide the stop of electricity market in cases specified under Point a and b, Clause 1 of this Article and notify the electricity system and market operating Unit.

3. The electricity system and market operating Unit shall inform the participants of electricity market of the decision on stopping the electricity market of the Electricity Regulatory Authority.

4. Operation of electricity system during the time of stopping the electricity market

a) The electricity system and market operating Unit must dispatch and operate the electricity system by the following principles:

- Ensuring the system operates safely, stably and reliably with the lowest cost of power purchase for the entire system;

- Ensuring the implementation of agreements on output in electricity import and export contracts and electricity sale contracts of BOT power plants and electricity sale contracts with output commitment of other power plants;

b) The electricity generating Units, electricity transmitting Units and other relevant Units must comply with the dispatching order of the electricity system and market operating Unit.

Article 61. Restoration of electricity market

1. The electricity market whose operation is restore when ensuring the following conditions:

a) The causes leadin to the stop of electricity market have been remedied;

b) The electricity system and market operating Unit has confirmed the capability of re-operation of electricity market.

2. The Electricity Regulatory Authority shall consider and decide the restoration of electricity market and inform the electricity system and market operating Unit.

3. The electricity system and market operating Unit shall inform the participants of electricity market of decision on restoration of electricity market of the Electricity Regulatory Authority.

Section 4: ELECTRICITY IMPORT AND EXPORT IN OPERATION OF ELECTRICITY MARKET

Article 62. Handling of exported power in mobilization schedule

1. Before 10:00 am of day D-1, the electricity system and market operating Unit shall announce the estimated exported power output in each transaction cycle of day D.

2. The exported power output is calculated as load at the export point and is used to calculate the forecast load of system for mobilization scheduling of next days and hours.

Article 63. Handling of imported power in mobilization scheduling

1. Before 10:00 am of day D-1, the electricity system and market operating Unit shall announce the estimated imported power output in each transaction cycle of day D.

2. The imported power output in mobilization scheduling is calculated as the source to be generated with the chart announced in advance in next day.

Article 64. Payment for imported and exported power

The imported power is paid under the electricity sale contract signed between the parties.

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