[0037] Example
[0038] The method designed by the present invention is to solve the calculation method of the clearing transaction under the condition of no price limit in the centralized bidding transaction of pumped electricity.
[0039] like figure 1 As shown, the present invention provides a calculation method for centralized bidding transaction clearing of pumped electricity, which is applicable to the situation of unlimited price in the electricity market. The method adopts a two-step clearing method, and quantifies and defines various behaviors in the market. , to construct a calculation formula for the transaction clearing price, which specifically includes the following steps:
[0040] transaction start
[0041] (1) The competent department issues the annual power generation plan and determines the bidding power for the centralized bidding transaction of the annual pumped hydropower. The bidding power for the centralized bidding transaction needs to comprehensively consider the annual capacity electricity fee of the pumped storage power station that Shanghai power generation companies should bear to determine the annual pumping power. power generation plan;
[0042] (2) The competent department determines the frequency and time of centralized bidding transactions for pumped hydropower in the current year
[0043] (3) Power trading institutions issue market transaction announcements to all market members through the power trading platform. The content of market transaction announcements includes but is not limited to: centralized bidding transaction electricity (power generation, the same below) determined by the competent authority, market members, declared electricity Upper and lower limits (power generation, the same below), declared electricity price upper and lower limits, transaction cycle, transaction process and time, etc.
[0044] Transaction declaration
[0045] (4) Each market member conducts transaction declarations separately through the power trading platform. The declared electricity (power generation, the same below) and the declared electricity price (including tax, excluding environmental protection electricity price and other government additional electricity prices, the same below) must not be negative.
[0046](5) Approve the upper and lower limits of declared electricity, and set the ratio of the rated installed capacity of each market member to the total installed capacity of all market members as R i装机容量占比 , the proportion of coal consumption and environmental incentives of each market member is E i (Determined by the competent department based on the weighted coal consumption of power supply and environmental protection emissions of the unit, the minimum scale is 0.5%, and 0≤E i ≤10%), each market member’s declared power limit is S i , the centralized bidding transaction power is Q 集中竞价交易电量 , the declared power amplification factor is K 申报放大系数 (The value is between 2 and 3, which is determined by the competent department). Declare power limit S i The calculation formula is:
[0047] S i =Q 集中竞价交易电量 *K 申报放大系数 *(R i装机容量占比 +E i )
[0048] The lower limit of declared electric quantity of market members is 0
[0049] (6) Approve the upper and lower limits of the declared electricity price. The upper limit of the declared electricity price of each market member is the government-approved on-grid electricity price (including tax, excluding environmental protection electricity price and other government additional electricity prices, the same below), and the lower limit of the declared electricity price is 0.
[0050] transaction ordering
[0051] (7) Check whether the declaration of market members is qualified, if the declared electricity quantity or the declared electricity price is missing, or the declared electricity quantity or the declared electricity price exceeds the limit range, it will be regarded as an invalid declaration and removed from the transaction sequence.
[0052] (8) Sorting the transactions, sorting the declared power of each market member according to the quotation from low to high; if the quotation is the same, sort according to the capacity level from large to small; if the capacity level is the same, sort according to the installed capacity Sort from large to small; in the case of the same installed capacity, sort from large to small according to the proportion of coal consumption and environmental protection incentives.
[0053] Transaction Clearing Calculation
[0054] (9) According to the order of transactions, market members trade in order to obtain the transaction clearing sequence. The following calculations are only based on the members in the sequence. The declared power of each market member is traded in sequence until the sum of the transaction and clearing power is equal to the centralized bidding transaction power , or all the declared power quantities of each market member are cleared, and the centralized bidding transaction ends.
[0055] (10) Calculate the electricity cost C of the pumped storage power station capacity declared by each market member i申报承担容量电费 , capacity electricity charge C i申报承担容量电费 The calculation formula is:
[0056] C i申报承担容量电费 =(P i批复电价 -P i申报电价 )*Q i申报电量 *W i
[0057] (11) Calculate the shortfall ratio R of all market members' declarations to bear the capacity electricity charges of the pumped storage power station 容量电费缺额占比 : (0≤R 容量电费缺额占比 ≤1), the shortfall ratio of capacity electricity charge R 容量电费缺额占比 The calculation formula is: (0≤R 容量电费缺额占比 ≤1)
[0058] R 容量电费缺额占比 =1-∑C i申报承担容量电费 /C 容量电费
[0059] (12) Calculate the corresponding demand electricity price P of each market member i需求电价 : (0≤P i需求电价 ≤P i批复电价 ), the demand price P corresponding to each market member i需求电价 Calculated according to the proportion of the upper limit of declared electric quantity of each market member and the declared electric quantity to calculate the capacity electricity fee that it should bear. The calculation formula is:
[0060] P i需求电价 =P i批复电价 -C 容量电费 *(S i *W i /∑(S i *W i ))/(Q i申报电量 *W i )
[0061] (13) Calculate the price increase factor P of each market member i调增因子 , each market member’s electricity price factor P i调增因子 It is calculated according to the proportion of capacity electricity charges declared by each market member. The calculation formula is:
[0062] P i调增因子 =(Max(P i申报电价 )-P i申报电价 )*C i申报承担容量电费 /C 容量电费
[0063] (14) Calculating the negative price reduction factor P of each market member i消极调减因子 , each market member’s negative price reduction factor P i消极调减因子 It is calculated according to the shortage situation of insufficient electricity charges declared by each market member, and the shortage situation of the declared electricity quantity that is not declared in full amount according to the upper limit. The calculation formula is:
[0064] P i消极调减因子 =Max(P i批复电价 -P i需求电价 )*(R 容量电费缺额占比 +(∑S i -∑Q i申报电量 )/Q 集中竞价交易电量 )
[0065] (15) Calculate the market power of each market member to adjust the electricity price factor P i市场力调减因子 , the market power of each market member adjusts the electricity price factor P i市场力调减因子 Calculated based on the absolute value of the difference between the declared electricity price of each market member and the weighted average declared electricity price, and the minimum value of the difference between the government-approved on-grid electricity price and the declared electricity price among all market members. The calculation formula is:
[0066] P i市场力调减因子 =P 偏移电价基数 *(C 容量电费 /∑(Q i成交出清电量 *W i ))/(|P i申报电价 -∑(Q i成交出清电量 *W i *P i申报电价 )/∑(Q i成交出清电量 *W i )|+Min(P i批复电价 -P i申报电价 ))
[0067] (16) Calculate the transaction clearing price P of each market member i成交出清电价 , the transaction clearing price P of each market member i成交出清电价 According to each market member's price increase factor Pi increase factor, negative price reduction factor Pi negative reduction factor, market power price reduction factor Pi market power reduction factor, the calculation formula is:
[0068] P i成交出清电价 =P i申报电价 +P i调增因子 -P i消极调减因子 -P i市场力调减因子
[0069] transaction execution
[0070] (17) The power trading agency submits the clearing results of the transaction to the power dispatching agency for security checks. If necessary, the power trading agency can break down the clearing power of each market member into a balanced balance based on the forecasted power balance of each month within the trading cycle. The monthly water pumping and electricity plan will be submitted to the power dispatching agency for safety verification.
[0071] (18) Each market member signs a contract with the power grid enterprise after confirming the clearing result of the transaction.
