Plan modification verification method based on feasible output range in frequency regulation market

Abstract

The present invention discloses a plan modification and verification method based on a feasible output interval in a frequency regulation market, including dynamic verification and static verification. Static verification allows plan modification and verification to be performed when the power plant is started or shut down, and dynamic verification performs plan modification and verification in the current startup mode. When the static verification method is selected, the corresponding frequency regulation index is obtained, all reasonable feasible processing intervals are calculated through the feasible output interval algorithm, and the plan modified by the scheduling is verified to see whether it falls within the feasible output interval; when the dynamic verification method is selected, the corresponding frequency regulation index parameter is obtained, the feasible output interval in the current startup state is calculated through the feasible output interval algorithm, and the plan modified by the scheduling is verified to see whether it falls within the feasible output interval. Finally, the verification result of the modified plan is notified to the dispatcher, so as to improve the rationality of the scheduling modification plan, reduce the difficulty of power plant output adjustment, and help improve the economic benefits of the power plant in the frequency regulation market.

Description

Technical Field

[0001] The invention belongs to the field of power grid operation control, and in particular relates to a method for modifying a power plant plan value in a frequency regulation market environment. Background Art

[0002] With the continuous deepening of the supply-side reform of the power grid and the continuous advancement of the construction of the power market, the interaction between the power market system and the traditional OCS system has become increasingly close. The Southern Power Grid has successively established the power spot market based on Guangdong, the Guangxi peak-shaving market, the Yunnan frequency regulation market, etc. Among them, the frequency regulation market is an important part of the power market. In the environment where the frequency regulation market operates, many requirements are put forward for the OCS system. In the OCS system, especially the operations with dispatcher intervention, it is necessary to consider the impact on the power market while considering the operation of the power grid. The planned value module of the OCS system plays a vital role in the operation and control of the power grid. The modification of the power plant plan will directly affect the output of the power plant and directly affect the operation of the power grid. At the same time, the planned data is an important data source for the frequency regulation market, so the modification of the plan also directly affects the operation of the frequency regulation market.

[0003] Currently, when the dispatcher modifies the plan, he only modifies the plan based on the dispatcher's understanding of the power grid operation and his own dispatching experience. In the frequency regulation market environment, if the dispatch modification plan is not verified, it is easy to cause the dispatch modification plan to conflict with the frequency regulation market clearing, resulting in difficulty in clearing the frequency regulation market and difficulty in power plant execution of the plan. In order to reduce the impact of dispatch modification on the operation of the frequency regulation market and ensure that the dispatch modification plan is within the normal boundaries of the frequency regulation market operation, the present invention provides a plan modification verification method based on the feasible output range in the frequency regulation market, which combines the indicators of the frequency regulation market operation and the actual operating conditions of the power plant to verify the plan modified by the dispatcher and provide the dispatcher with reasonable suggestions for plan modification. Summary of the invention

[0004] Purpose of the invention: The present invention aims to provide a plan modification verification method based on feasible output range in the frequency regulation market, which can help dispatchers formulate reasonable plan modification data and ensure the normal operation of the power grid.

[0005] Technical solution: A plan modification and verification method based on a feasible output range in a frequency regulation market of the present invention comprises the following steps:

[0006] Step 1, obtaining the winning bid mark and winning bid capacity of the power plant in the frequency regulation market;

[0007] Step 2: The dispatcher modifies the power plant plan and selects the static verification or dynamic verification method for the feasible output range;

[0008] Step 3: According to the selected verification method, the start and stop status, installed capacity, vibration zone, frequency modulation bid capacity and other data of the unit are obtained, and the corresponding feasible output interval set is calculated;

[0009] Step 4: Check whether each time plan modified by the dispatcher falls within the feasible output interval set;

[0010] Step 5, compile and count the verification results of the planned values ​​at each moment of the pre-modification of the dispatcher, and show the verification results of all moments to the dispatcher;

[0011] Step 6: The dispatcher confirms whether to modify the plan based on the verification results, and completes or exits the plan modification.

[0012] Furthermore, the step 1 obtains the winning capacity of the power plant's frequency regulation market winning mark, and the OCS system of the scheduling modification plan needs to interact with the frequency regulation market system to obtain the real-time winning status and winning capacity of the corresponding power plant in the frequency regulation market environment.

[0013] Furthermore, step 2 provides different verification methods:

[0014] 1) Provide two verification modes: static verification and dynamic verification, which can be selected by the dispatcher according to the current power grid operation status.

[0015] 2) Provide static verification and dynamic verification methods based on feasible output range. When the static verification method is selected, the feasible output range algorithm is used to plan the feasible output range set under all startup modes, and the pre-modification plan is verified by judging whether it falls within the feasible output range set; when the dynamic verification method is selected, the feasible output range under the current startup mode is calculated by the feasible output range algorithm, and the pre-modification plan is verified by judging whether it falls within the feasible output range set.

[0016] Furthermore, the feasible output interval algorithm of step 3 calculates different feasible output intervals according to the selected static verification method or dynamic verification method. The specific calculation logic is as follows:

[0017] 1) The data required for the feasible output range algorithm, including the current unit startup mode of the power plant, the rated capacity of each unit, the unit vibration zone, the frequency modulation winning capacity and other data, are obtained from the AGC and SCADA applications in the OCS system.

[0018] 2) Calculation of feasibility output range set by static verification method: Assume that the power plant winning the bid for frequency regulation contains N units. Considering that the vibration zones of different units are inconsistent, it is assumed that there are j units in operation, then There are several boot combinations, assuming that the boot combination set is C j , available The rated capacity of the i-th operating unit is P ri , the vibration zone of the unit is P vi , the winning bid capacity of the power plant frequency regulation is P f , the feasible output range under each startup combination is To obtain Filter the feasible output ranges to select the reasonable feasible output ranges. The screening conditions are: If the conditions are met, it is a reasonable feasible output range. According to the above screening conditions, in the j-unit startup combination, the feasible output range set is set as A j Therefore, the feasible output range set under all startup modes is {A1,…A j …,A n}, where 1≤j≤N.

[0019] 3) Calculation of feasibility processing interval under dynamic verification mode, assuming that the number of units in operation in the current power plant is n, and the rated capacity of the i-th unit is P ri , the vibration zone of the unit is P vi , the winning bid capacity of the power plant frequency regulation is P f , then the feasible output range under the current startup mode is like Then there is no feasible output range under the current startup mode.

[0020] Furthermore, the plan verification logic of step 4 includes:

[0021] 1) In the frequency regulation market environment, the winning capacity of power plants is in hours, and the winning capacity of power plants in different hours is different. The plan value verification method based on the feasible output range algorithm uses the whole hour as the interval to split the modified plan into plans for different time periods. For each time period, the feasible output range of each time period is calculated through the feasible output range algorithm based on the winning capacity of the frequency regulation within the time period, the verification method selected by the dispatcher, the vibration zone of the unit, the rated capacity and other data.

[0022] 2) According to the different time periods divided in 1), the scheduling plan for each time period is modified and verified according to the feasible output range of each time period.

[0023] Furthermore, step 5 integrates the plan verification results of all time periods in step 4, screens out the plans for the times that pass and fail the verification, and displays the plan verification integration to the dispatcher, who decides whether to modify the plan or exit the modification.

[0024] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: In the frequency modulation market environment, the winning bid status and winning bid capacity of the power plant in different time periods are fully considered, and the current startup operation status and operating parameters of the result unit are calculated through the feasible output interval algorithm. The feasible output interval set of different time periods is calculated, and the pre-modification plan of the dispatch in different time periods is verified, and the dispatch verification results are informed. The verification results can be used as an auxiliary reference for the dispatch decision to modify the plan, help the dispatch to formulate reasonable plan modification data, ensure the normal operation of the power grid, and also help to improve the economic benefits of the operation of the power plant in the frequency modulation market environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of the plan verification method based on the feasible output range in the frequency regulation market of the present invention;

[0026] Figure 2 This is the calculation result diagram of the feasible output range;

[0027] Figure 3 This is a diagram showing the calibration results. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0029] Example

[0030] Taking Yunnan Dachaoshan Power Plant as an example, the power plant is currently in the frequency regulation bidding stage, the frequency regulation bidding capacity is 80MW, and the unit vibration zone is [0-160]. The dispatcher modifies the planned value in the planned value interface of Dachaoshan Power Plant, selects the static verification method, and plans to change the planned value at 18:45-19:30 to 100. After confirming the modification, the plan modification program starts the static mixing of the feasible output range and calculates the feasible processing range under all startup modes. Figure 2 As shown, Figure 2 It shows that the program obtains the rated capacity, vibration zone and other information of all units, and calculates the feasible output range under all startup modes as [560,595], [720,820], [880,1045], [1040,1270].

[0031] Then, according to the feasible output range under the static verification method, combined with the modified scheduling plan, it is judged whether the modified scheduling plan falls within the feasible range. Figure 2 The calculation results of the feasibility interval show that when the dispatcher changes the planned value of 18:45-19:30 to 100, the feasibility processing interval check is not met. Therefore, the program will pop up a detailed check result to prompt the dispatcher to decide whether to modify the plan. The prompt interface is as follows: Figure 3 shown.

Claims

1. A plan modification and verification method based on feasible output range in a frequency regulation market, characterized in that: The following steps are involved: Step 1, obtaining the winning bid mark and winning bid capacity of the power plant in the frequency regulation market; Step 2: The dispatcher modifies the power plant plan and selects the static verification or dynamic verification method for the feasible output range; Step 3: Obtain unit data according to the selected verification method, including start-up and shutdown status, installed capacity, vibration zone, and frequency modulation winning capacity, and calculate the corresponding feasible output range set; specifically, including: 1) The data required for the feasible output range algorithm, including the current power plant unit startup mode, rated capacity of each unit, unit vibration zone, frequency modulation bid capacity and other data, are obtained from the AGC and SCADA applications in the OCS system. 2) Calculation of feasibility output range set by static verification method: Assume that the power plant winning the bid for frequency regulation contains N units. Considering that the vibration zones of different units are inconsistent, and there are j units started, then There are several boot combinations, assuming that the boot combination set is C j , available feasible output range; let the rated capacity of the i-th operating unit be P ri , the vibration zone of the unit is P vi , the winning bid capacity of the power plant frequency regulation is P f , the feasible output range under each startup combination is To obtain Filter the feasible output ranges to select the reasonable feasible output ranges. The screening conditions are: If the conditions are met, it is a reasonable feasible output range. According to the above screening conditions, in the j-unit startup combination, the feasible output range set is set as A j Therefore, the feasible output range set under all startup modes is {A1, … A j …,A n }, where 1≤j≤N; 3) Calculation of feasible output range under dynamic verification mode, assuming that the number of units in operation in the current power plant is n, and the rated capacity of the i-th unit is P ri , the vibration zone of the unit is P vi , the winning bid capacity of the power plant frequency regulation is P f , then the feasible output range under the current startup mode is like Then there is no feasible output range under the current startup mode; Step 4: Check whether each time plan modified by the dispatcher falls within the feasible output interval set; Step 5, compile and count the verification results of the planned values ​​at each moment pre-modified by the dispatcher, and show the verification results of all moments to the dispatcher; Step 6: The dispatcher confirms whether to modify the plan based on the verification results, and completes or exits the plan modification.

2. The plan modification and verification method based on the feasible output range in the frequency regulation market according to claim 1 is characterized in that: In step 1, the winning mark and winning capacity of the power plant in the frequency regulation market are obtained, and the OCS system of the scheduling modification plan needs to interact with the frequency regulation market system to obtain the real-time winning status and winning capacity of the corresponding power plant in the frequency regulation market environment.

3. The plan modification and verification method based on the feasible output range in the frequency modulation market according to claim 1 is characterized in that: In step 2, the static verification method is to plan a feasible output interval set under all startup modes through a feasible output interval algorithm, and to verify whether the modification plan is verified by judging whether it falls within the feasible output interval set.

4. The method for modifying and verifying a plan based on a feasible output range in a frequency modulation market according to claim 1 is characterized in that: In step 2, the dynamic verification method is to calculate the feasible output range under the current startup mode through a feasible output range algorithm, and to verify whether the modification plan is within the feasible output range set by judging whether the modification plan is verified.

5. The method for modifying and verifying a plan based on a feasible output range in a frequency modulation market according to claim 1, characterized in that: The plan verification logic of step 4 includes: 1) In the frequency regulation market environment, the winning capacity of power plants is in hours, and the winning capacity of power plants in different hours is different. The plan value verification method based on the feasible output interval algorithm uses the whole hour as the interval to split the modified plan into plans for different time periods. For each time period, the feasible output interval for each time period is calculated based on the winning capacity of the frequency regulation in the time period, the verification method selected by the dispatcher, the vibration zone of the unit, and the rated capacity data through the feasible output interval algorithm; 2) According to the different time periods divided in 1), the pre-modified planning value of the scheduling of each time period is checked according to the feasible output range of each time period.

6. The method for modifying and verifying a plan based on a feasible output range in a frequency modulation market according to claim 1, characterized in that: The step 5 integrates the plan verification results of all time periods in step 4, screens out the plans for the times when the verification passes and fails, and displays the plan verification integration to the dispatcher, who decides whether to modify the plan or exit the modification.

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