Day-ahead market clearing method for electrical energy storage based on peak-shaving quotas

Abstract

The present invention relates to the technical field of electricity markets. Disclosed is a day-ahead market clearing method for electrical energy storage participation based on peak-shaving quotas. In particular, the present invention relates to a day-ahead market clearing method for electrical energy storage based on peak-shaving quotas, comprising the following steps: S1, on the basis of an electricity load curve, calculating a peak energy amount during peak periods and a peak-shaving energy amount during off-peak periods; S2, calculating peak-shaving quotas for different types of power sources on the basis of the peak energy amount during peak periods and the peak-shaving energy amount during off-peak periods; S3, determining the peak capacity of different types of power sources during peak periods and the peak-shaving capacity during off-peak periods; S4, calculating the peak-shaving quota transaction demand of different types of power sources; and S5, organizing the submission and performing clearing to obtain a clearing result of peak-shaving quotas for electrical energy storage. The present invention enables electrical energy storage systems to participate in market pricing, thereby improving the situation in which electrical energy storage transaction revenues fail to effectively cover operating costs, and incentivizing energy storage operators to actively participate in market transactions; and additionally, the present invention can effectively solve coordination issues associated with the participation of a plurality of electrical energy storage systems in an electricity spot market.

Description

A peak regulation quota-based power storage day-ahead market clearing method TECHNICAL FIELD

[0001] The present application relates to the technical field of power market, and particularly relates to a peak regulation quota-based power storage day-ahead market clearing method. BACKGROUND

[0002] In recent years, China has accelerated energy transformation development and vigorously promoted the construction of wind power, photovoltaic and other new energy. Due to the poor controllability of new energy output, the power grid faces increasingly prominent peak regulation pressure, which also becomes a key factor limiting new energy consumption. Under this background, power storage has become an important channel to improve the regulation capacity of the power grid and promote new energy consumption. The method of power storage participating in the power market transaction has become the focus of research.

[0003] There are mainly two ways for power storage to participate in the market in China at present:

[0004] (1) The power grid in the province where the power spot market has been built generally adopts the self-dispatching mode. In this mode, the power storage formulates the charging and discharging curve by itself, and the market operation agency judges the new energy consumption benefit. The power storage is the price accepter and is settled according to the time-of-use electricity price of the power spot market;

[0005] (2) The power grid in the province where the power spot market has not been built generally adopts the peak regulation market mode. In this mode, the power storage is charged in the low valley peak regulation period and is settled according to the peak regulation market clearing price; and is discharged in the peak period and is settled according to the new energy on-grid price.

[0006] With the continuous deepening of the power market reform, the power spot market has become the focus of market construction in China. Guangdong, Shanxi, Shandong and other provinces have started the trial operation of the power spot market connection settlement, and Jiangsu, Henan and other provinces have started the trial operation of the power spot market. Generally speaking, after the power spot market is built, the peak regulation market should be integrated into the power spot market to avoid problems such as price distortion. Under this background, the method of power storage participating in the market transaction under the power spot market is more urgent.

[0007] However, although the traditional self-dispatching mode has a simple implementation process, the power storage does not participate in market pricing, there is a situation that the transaction benefit cannot effectively compensate the operation cost, which is not conducive to encouraging the power storage operator to actively participate in market transaction; and it cannot effectively solve the connection problem of multiple power storages participating in the power spot market.

[0008] Therefore, a peak regulation quota-based power storage day-ahead market clearing method is needed.

[0009] SUMMARY

[0010] In the prior art, electric energy storage does not participate in market pricing, resulting in a situation that transaction benefits cannot effectively compensate for operating costs, which is not conducive to encouraging electric energy storage operators to actively participate in market transactions; meanwhile, it cannot effectively solve the connection problem of multiple electric energy storages participating in the electricity spot market, the present application provides a kind of electric energy storage day-ahead market clearing method based on peak shaving quota.The specific technical solutions are as follows:

[0011] A kind of electric energy storage day-ahead market clearing method based on peak shaving quota, comprising the following steps:

[0012] S1, according to the time sequence curve of power load, the top peak power of high peak period and the peak shaving power of low valley period are measured;

[0013] S2, according to the top peak power of high peak period and the peak shaving power of low valley period, the peak shaving quota of different types of power is measured;

[0014] S3, the top peak capacity of high peak period and the peak shaving capacity of low valley period of each type of power are measured;

[0015] S4, compare the peak shaving quota and peak shaving capacity of different types of power, and measure the peak shaving quota transaction demand of different types of power;

[0016] S5, according to the peak shaving quota transaction demand of different types of power, the transaction price is organized and declared, and the peak shaving quota clearing result of electric energy storage is obtained.

[0017] Preferably, step S1 specifically comprises the following steps:

[0018] S11, the time sequence curve of power load is converted into a sustained curve;

[0019] S12, according to the power load change of power load sustained curve, the power load is divided into high peak, low valley and flat section three periods;

[0020] S13, the top peak power of high peak period and the peak shaving power of low valley period are determined.

[0021] Preferably, the step S12 adopts the following division method:

[0022] Four nodes are defined in the power load sustained curve, which are minimum power load node A, 20% power load node B, 80% power load node C and maximum power load node D, and the power load change range of the whole day is divided into AB, BC and CD three intervals; wherein, interval AB is low valley period, interval BC is flat period, and interval CD is high peak period, which is expressed by the following formula:

[0023] In the formula, P A , P B , P C , P DP PLmax P PLmin P P

[0024] P P P

[0025] P P P L P C P D P A P B P C P D P P

[0026] S2 S2

[0027] S21 S21

[0028] S21 S21

[0029] S21 S21

[0030] S21 S21 S21

[0031] S21 S21 S21 S21

[0032] S21 S21 S21

[0033] S21 S21 The power generation output regulation space of the new energy n;

[0034] S213, the power generation output regulation space of the electric energy storage s is the difference between the maximum discharge power and the maximum charging power, and is expressed as:

[0035] In the formula, The maximum discharge power and the maximum charging power of the electric energy storage s are respectively, The power generation output regulation space of the electric energy storage s.

[0036] Preferably, the specific allocation method of the peak shaving quota according to the power generation output regulation space in step S22 is as follows:

[0037] S221, the peak power quota of different types of power sources in the peak period is expressed as:

[0038] In the formula, The peak power quotas of the conventional power source g, the new energy n and the electric energy storage s in the peak period are respectively E P The peak power in the peak period is λ G , λ N , λ S The power generation output regulation space coefficients of the conventional power source, the new energy and the electric energy storage are respectively P AS,W The system weighted regulation space is expressed as:

[0039] In the formula, NG, NN and NS are respectively the number of conventional power sources, the number of new energies and the number of electric energy storages;

[0040] S222, the peak shaving power quota of different types of power sources in the valley period is expressed as:

[0041] In the formula, The peak shaving power quotas of the conventional power source g, the new energy n and the electric energy storage s in the valley period are respectively.

[0042] Preferably, the determination method of the peak power capacity in the peak period and the peak shaving capacity in the valley period in step S3 is as follows:

[0043] S31, the conventional power source:

[0044] The peak power capacity in the peak period is defined as the available power generation capacity exceeding the standard peak output in the peak period, and the peak shaving capacity in the valley period is defined as the available power generation capacity less than the standard peak shaving output in the valley period, and is expressed as:

[0045] In the formula, The peak power capacity and the peak shaving capacity of the conventional power source g in the peak period are respectively TP , T L respectively are the duration of the peak period and the duration of the valley period of the electricity load, respectively are the peak period standard peak output and the valley period standard peak shaving output of the conventional power source g, respectively are the maximum and minimum power generation capacity of the conventional power source g;

[0046] S32, new energy:

[0047] The peak period peak capacity and the valley period peak shaving capacity of the new energy are expressed as:

[0048] In the formula, respectively are the peak period peak capacity and the valley period peak shaving capacity of the new energy n, is the predicted power generation output of the new energy n at the period t, respectively are the peak period standard peak output and the valley period standard peak shaving output of the new energy n;

[0049] S33, electric energy storage:

[0050] The peak period peak capacity and the valley period peak shaving capacity are the electric energy storage capacity, which can be expressed as:

[0051] In the formula, respectively are the peak period peak capacity and the valley period peak shaving capacity of the electric energy storage s, is the electric energy storage capacity of the electric energy storage s.

[0052] Preferably, the peak shaving quota transaction demand in step S4 includes a peak period peak capacity transaction demand and a valley period peak shaving capacity transaction demand, and the peak period peak capacity transaction demand is the difference between the peak period peak capacity and the peak period peak power quota, and the valley period peak shaving capacity transaction demand is the difference between the valley period peak shaving capacity and the valley period peak shaving power quota.

[0053] Preferably, step S5 specifically includes the following steps:

[0054] S51, organizing the power source to respectively declare a peak period peak capacity transaction offer and a valley period peak shaving capacity transaction offer;

[0055] S52, according to the peak period peak capacity transaction offer or the valley period peak shaving capacity transaction offer, the suppliers and the buyers are sorted in descending order, and the clearing is organized according to the high-low matching principle.

[0056] Compared with the prior art, the present application has the following beneficial effects:

[0057] The application proposes a peak regulation quota index, formulates the peak regulation quota index of each type of power source participating in the day-ahead market transaction according to the power load and duration of the peak period and the valley period; each type of power source reports the peak regulation quota transaction price and transaction power according to its own operation characteristics, so that the electric energy storage can participate in market pricing, improve the situation that the transaction income cannot effectively compensate the operation cost, and then be conducive to encouraging the electric energy storage operator to actively participate in market transaction; on this basis, the high-low matching principle is adopted to determine the day-ahead peak regulation quota market clearing result of each type of power source, so as to determine the charging and discharging power and price of the electric energy storage, which can effectively solve the connection problem of multiple electric energy storages participating in the power spot market. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to more clearly illustrate the specific embodiments of the present application, the drawings required to be used in the description of the specific embodiments will be briefly introduced as follows.

[0059] Fig. 1 is the implementation flow of the present application;

[0060] Fig. 2 is the power load duration curve of the embodiment of the present application. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0062] Please refer to Fig. 1, which is the implementation flow of the electric energy storage day-ahead market clearing method based on peak regulation quota provided by the embodiment of the present application, and the implementation points are as follows:

[0063] Step S1: according to the power load curve, the top peak power of the peak period and the peak regulation power of the valley period are calculated.

[0064] The implementation purpose of this step is to calculate the top peak power of the peak period and the peak regulation power of the valley period according to the power load curve.

[0065] S11 converts the power load time sequence curve into a duration curve.

[0066] As shown in Fig. 2, which is the power load duration curve provided by the embodiment of the present application, the horizontal coordinate of the duration curve is different power load power, and the vertical coordinate is the duration time exceeding the power load level. This conversion method is a commonly used method for power system analysis, and the implementation process of the present application will not be described here.

[0067] S12 determines the power load of the high peak, low valley and flat section.

[0068] According to the change of the power load, the power load is divided into three time periods of peak, valley and flat section. The peak, valley and flat section can be determined by the dispatching operation personnel according to the artificial experience, or can be divided according to the given standard. In the application, the method of the 80 / 20 principle is adopted, and according to the method, the first 20% change interval of the power load in the power load change range is the peak period, and the last 20% change interval of the power load is the valley period. As shown in FIG. 2, four points A, B, C and D are respectively used for the power load starting node, the 20% power load node B, the 80% power load node C and the maximum power load node D of the power load continuous curve, that is, the following conditions are met:

[0069] In the formula, P A , P B , P C , P D are respectively the power loads of the four points A, B, C and D of the power load continuous curve, P PLmax , P PLmin are respectively the maximum and minimum power loads.

[0070] According to the power load boundaries of the peak, valley and flat section, the power load continuous curve can be divided into the valley period (that is, A to B in FIG. 2), the flat section period (that is, B to C in FIG. 2) and the peak period (that is, C to D in FIG. 2).

[0071] S13 determines the peak power of the peak period and the peak-shaving power of the valley period.

[0072] In the application, the peak power of the peak period is defined as the power load exceeding the average power load in the peak period, and the peak-shaving power of the valley period is defined as the power load lower than the average power load in the valley period, that is:

[0073] In the formula, E P , E L are respectively the peak power of the peak period and the peak-shaving power of the valley period, P(t) is the power load at time t, P B , P C are respectively the power loads of the 20% power load node B and the 80% power load node C of the power load continuous curve, t A , t B , t C , t D are respectively the times corresponding to the minimum power load node A, the 20% power load node B, the 80% power load boundary point C and the maximum power load node D on the power load continuous curve.

[0074] Step S2: measuring and calculating the peak-shaving quota of different types of power sources;

[0075] The implementation purpose of this step is to calculate the peak regulation quota of different types of power sources according to the peak power in peak hours and the peak regulation power in valley hours. The peak regulation quota is essentially the peak power in peak hours and the peak regulation power in valley hours that should be borne by different types of power sources.

[0076] S21, calculating the power output adjustment space of each type of power source.

[0077] S211, for conventional power sources, the power output adjustment space is the difference between the maximum and minimum power generation capacity, which can be represented as:

[0078] In the formula, Pmax g and Pmin g are the maximum and minimum power generation capacity of the conventional power source g, Preg g is the power output adjustment space of the conventional power source g.

[0079] S212, for new energy, the power output adjustment space is the difference between the predicted maximum and minimum power generation capacity, which can be represented as:

[0080] In the formula, Pmax n and Pmin n are the predicted maximum and minimum power generation capacity of the new energy n, Preg n is the power output adjustment space of the new energy n.

[0081] S213, for electric energy storage, the power output adjustment space is the difference between the maximum discharge power and the maximum charging power, which can be represented as:

[0082] In the formula, Pmax s and Pmin s are the maximum discharge power and the maximum charging power of the electric energy storage s, Preg s is the power output adjustment space of the electric energy storage s.

[0083] S22, allocating the peak regulation quota according to the power output adjustment space. The peak power in peak hours and the peak regulation power in valley hours need to be allocated separately.

[0084] S221, the peak power quota in peak hours for different types of power sources can be represented as:

[0085] In the formula, Ppeak g, Ppeak n, and Ppeak s are the peak power quotas in peak hours for conventional power sources, new energy, and electric energy storage, respectively, and λ G 、λ N 、λ S Preg g, Preg n, and Preg s are the power output adjustment space coefficients of conventional power sources, new energy, and electric energy storage, respectively, determined by market trading rules, used to play a market guiding role, and P AS,W Preg is the system weighted adjustment space, which can be represented as:

[0086] In the formula, NG, NN, and NS represent the number of conventional power sources, the number of new energy sources, and the number of energy storage sources, respectively.

[0087] S222. Peak-shaving power quotas for different types of power sources during off-peak hours can be expressed as follows:

[0088] In the formula, The following are the power quotas for peak shaving during off-peak hours: conventional power source (g), new energy source (n), and energy storage (s).

[0089] Step S3: Compare the peak shaving quotas and peak shaving capabilities of different types of power sources, and calculate their peak shaving quota trading needs;

[0090] The purpose of this step is to calculate the peak-load capacity during peak hours and the off-peak-load capacity during off-peak hours for various types of power sources. Peak-load capacity refers to the amount of electricity available for peak load during peak hours, while off-peak-load capacity refers to the amount of electricity available for peak load during off-peak hours.

[0091] S31, Standard Power Supply:

[0092] Its peak-hour peak capacity is defined as the amount of electricity that can be generated when the output exceeds the standard peak output during peak hours, while its off-peak peak-shaving capacity is defined as the amount of electricity that can be generated when the output is below the standard peak-shaving output during off-peak hours, which can be expressed as: T P =t C -t D (10) T L =t A -t B (11)

[0093] In the formula, These represent the peak-hour capacity and off-peak-hour peak-shaving capacity of a conventional power supply, respectively, T. L The duration of the off-peak period is the time t corresponding to the minimum electricity load node A on the electricity load duration curve. A The time t corresponding to node B with 20% electricity load. B The difference; T P The duration of peak electricity load is the time t corresponding to the 80% electricity load threshold point C on the electricity load duration curve. C The time t corresponding to the maximum power load node D D difference, The peak power and the valley power are determined by a market operation agency. In the present application, the rated capacity of 80% and the basic peak shaving service corresponding power generation are recommended as the peak power and the valley power, which are unified with the existing relevant standards.

[0094] S32, new energy:

[0095] The peak capacity in the peak period is defined as the expected power generation exceeding the standard peak power in the peak period, and the peak shaving capacity in the valley period is defined as the less power generation than the standard peak shaving power in the valley period. It should be noted that, since the power generation of new energy is not easy to adjust, it needs to be restored to the power load time curve. Accordingly, the peak capacity in the peak period and the peak shaving capacity in the valley period of new energy can be expressed as:

[0096] In the formula, are the peak capacity in the peak period and the peak shaving capacity in the valley period of new energy n, is the predicted power generation of new energy n in period t, The peak power and the valley power are determined by a market operation agency. In the present application, the rated capacity of 80% and the basic peak shaving service corresponding power generation are recommended as the peak power and the valley power, which are unified with the existing relevant standards.

[0097] S33, electric energy storage:

[0098] The peak capacity in the peak period and the peak shaving capacity in the valley period are the power storage capacity, which can be expressed as:

[0099] In the formula, are the peak capacity in the peak period and the peak shaving capacity in the valley period of electric energy storage n, is the power storage capacity.

[0100] Step S4: measuring the peak shaving quota transaction demand of different types of power sources;

[0101] The purpose of this step is to compare the peak shaving quota and the peak shaving capacity of different types of power sources, and measure the peak capacity transaction demand in the peak period and the peak shaving capacity transaction demand in the valley period.

[0102] The peak capacity transaction demand of any power source in the peak period is the difference between its peak capacity and the peak power quota. If the transaction demand is positive, it can be used as a supplier to participate in the peak capacity transaction in the peak period, otherwise it needs to be a buyer.

[0103] The peak regulation capacity transaction demand of any power supply in the valley period is the difference between its peak regulation capacity and the peak regulation capacity quota. If the transaction demand is positive, the power supply can participate in the peak regulation capacity transaction as a supplier, otherwise it needs to be a buyer.

[0104] Step S5: According to the peak regulation quota transaction demand of different types of power supply, organize the declaration, and clear the obtained electric energy storage peak regulation quota clearing result.

[0105] The purpose of this step is to organize market members to declare transaction prices according to the peak regulation quota transaction demand of different types of power supply, and to clear the electric energy storage peak regulation quota clearing result. Considering the difference between the peak capacity in the peak period and the peak regulation capacity in the valley period, the above two varieties need to be cleared separately. The electric energy storage discharge capacity in the peak period and the discharge capacity in the valley period can be obtained by clearing, which can be used as the basis for electric energy storage operation planning, and the power generation output curve is determined by the dispatching agency.

[0106] S51, organize the power supply to respectively declare the peak capacity transaction price in the peak period and the peak regulation capacity transaction price in the valley period.

[0107] S52, organize the peak capacity transaction in the peak period and the peak regulation capacity transaction in the valley period to clear According to the peak capacity transaction price in the peak period or the peak regulation capacity transaction price in the valley period, the suppliers and buyers are sorted in descending order, and the clearing is organized according to the high-low matching principle.

[0108] Organize the peak capacity transaction in the peak period to clear. According to the peak capacity transaction price in the peak period, the suppliers and buyers are sorted in descending order, and the clearing is organized according to the high-low matching principle.

[0109] Organize the peak regulation capacity transaction in the valley period to clear. According to the peak regulation capacity transaction price in the valley period, the suppliers and buyers are sorted in descending order, and the clearing is organized according to the high-low matching principle.

[0110] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application.

Claims

1. A method for clearing a day-ahead market for electric energy storage based on a peak shaving quota, characterized in that, The three types of power sources, i.e., electrical energy storage, conventional power source and new energy, are considered together to participate in market pricing, including the following steps: S1, according to the power load time curve, the peak power in the peak period and the peak shaving power in the valley period are measured; S2, according to the peak power in the peak period and the peak shaving power in the valley period, the peak shaving quota of different types of power sources is measured; S3, the peak capacity in the peak period and the peak shaving capacity in the valley period of each type of power source are measured; S4, the peak shaving quota transaction demand of different types of power sources is measured by comparing the peak shaving quota and the peak shaving capacity of different types of power sources; S5, according to the peak shaving quota transaction demand of different types of power sources, the transaction price is organized, and the clearing result of the electrical energy storage peak shaving quota is obtained.

2. The method of claim 1, wherein, Step S1 specifically includes the following steps: S11, the power load time curve is converted into a continuous curve; S12, according to the power load change of the power load continuous curve, the power load is divided into three periods of peak, valley and flat; S13, the peak power in the peak period and the peak shaving power in the valley period are determined.

3. The method of claim 2, wherein, The step S12 adopts the following division method: Four nodes are defined in the continuous curve of electricity load, which are minimum electricity load node A, 20% electricity load node B, 80% electricity load node C and maximum electricity load node D, and the range of electricity load change in a day is divided into three intervals AB, BC and CD; wherein, interval AB is the valley period, interval BC is the flat period, and interval CD is the peak period, which are expressed by the following formulas: In the formula, P A , P B , P C , P D are the electric loads at the A, B, C, and D points on the continuous load curve, respectively, and P PLmax , P PLmin are the maximum and minimum electric loads, respectively.

4. The method of claim 2, wherein, The peak period top peak power is defined as the power consumption of the peak period exceeding the average power consumption load, and the valley period peak shaving power is defined as the power consumption of the valley period lower than the average power consumption load, that is: In the formula, E P , E L are peak power in peak hours and peak-shaving power in off-peak hours, respectively, P(t) is the power load at time t, P C , P D are the power loads at 20% power load node B and 80% power load node C, respectively, t A , t B , t C , t D are the times corresponding to the minimum power load node A, 20% power load node B, 80% power load node C and maximum power load node D, respectively, on the power load curve.

5. The method of claim 1, wherein, Step S2 specifically includes the following steps: S21, the generation output adjustment space of each type of power source is measured; S22, the peak shaving quota is allocated according to the generation output adjustment space, and the peak power in the peak period and the peak shaving power in the valley period need to be allocated respectively.

6. The method of clearing a day-ahead market for electric energy storage based on peak shaving allocation according to claim 5, wherein, The specific measurement method of the generation output adjustment space of each type of power source in step S21 is as follows: S211. For conventional power sources, the power output adjustment range is the difference between the maximum and minimum power generation capacity, expressed as: In the formulae, maximum and minimum power generation capacity of the conventional power source g, respectively, is the generation output adjustment space of the conventional power source g; S212, for new energy, power generation output adjustment space is the difference between the predicted maximum power generation output and the minimum power generation output, expressed as: In the formulae, respectively the predicted maximum and minimum power generation output of the new energy n, is the generation output adjustment space of the new energy n; S213. For electrical energy storage, the power generation output adjustment space is the difference between the maximum discharge power and the maximum charging power, expressed as: In the formulae, respectively the maximum discharging power, the maximum charging power of the electrical energy storage s, is the generation output adjustment space of the electrical energy storage s.

7. The method for clearing a day-ahead market of electric energy storage based on peak shaving quota according to claim 5 or 6, characterized in that, The specific allocation method of the peak shaving quota according to the generation output adjustment space in step S22 is as follows: S221, the peak power quota of different types of power sources in the peak period is represented as: In the formulae, In order from left to right: conventional power g, new energy n, electric energy storage s peak period top peak power quota, E P is the peak period top peak power, λ G , λ N , λ S are the generation output adjustment space coefficients of conventional power, new energy and electric energy storage respectively, P AS,W is the system weighted adjustment space, which is expressed as: In the formula, NG, NN and NS are respectively the number of conventional power sources, the number of new energy sources and the number of electrical energy storages; S222, the peak-shaving electricity quota of different types of power supply during the valley period is represented as: In the formulae, The peak power in the peak period and the peak shaving power in the valley period of the conventional power source g, the new energy n and the electrical energy storage s are in turn.

8. The method of clearing a day-ahead market for electric energy storage based on peak shaving allocation according to claim 1, wherein, The determination method of the peak capacity in the peak period and the peak shaving capacity in the valley period in step S3 is as follows: S31, conventional power source: The peak capacity in the peak period is defined as the corresponding available power generation capacity exceeding the standard peak output in the peak period, and the valley period peak shaving capacity is defined as the corresponding less power generation capacity less than the standard peak shaving output in the valley period, expressed as: In the formulae, respectively are the peak capacity of the conventional power supply g in the peak period and the peak shaving capacity in the valley period, T P , T L respectively are the duration of the peak period and the duration of the valley period of the electricity load, respectively, are the standard peak output and the standard peak shaving output in the off-peak period, is the maximum and minimum generation capacity of the conventional power source g respectively; S32, new energy: The peak ability of new energy in peak period and the peak regulation ability in valley period are expressed as: In the formulae, The new energy n peak period top peak capacity and the low valley period peak regulation capacity, respectively, to predict the power generation output for a new energy n period t, is the standard peak output in the peak period and the standard peak shaving output in the valley period of the new energy n respectively; S33, electrical energy storage: The peak capacity in peak hours and the peak-shaving capacity in off-peak hours, i.e. the electricity storage capacity, can be expressed as: In the formulae, speak to the peak capacity during the high peak period and the valley period, is the storage capacity of the electrical energy storage s.

9. The method of clearing a day-ahead market for electric energy storage based on peak shaving allocation according to claim 1, wherein, The peak shaving quota transaction demand includes the peak capacity transaction demand in the peak period and the peak shaving capacity transaction demand in the valley period, and the peak capacity transaction demand in the peak period is the difference between the peak capacity in the peak period and the peak power quota in the peak period; the peak shaving capacity transaction demand in the valley period is the difference between the peak shaving capacity in the valley period and the peak shaving power quota in the valley period.

10. The method of clearing a day-ahead market for electric energy storage based on peak shaving allocation according to claim 1, wherein, Step S5 specifically includes the following steps: S51, organize the power source to report the peak capacity transaction price in the peak period and the peak shaving capacity transaction price in the valley period respectively; S52, according to the peak capacity transaction price in the peak period or the peak shaving capacity transaction price in the valley period, the suppliers and buyers are sorted in order from high to low respectively, and the clearing is organized according to the high-low matching principle.

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