CN111681079A - Auxiliary service market trading method and system for promoting clean energy consumption - Google Patents
Auxiliary service market trading method and system for promoting clean energy consumption Download PDFInfo
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Abstract
The invention discloses an auxiliary service market trading method and system for promoting clean energy consumption, which comprises the following steps: determining a machine set of a responsible party of the standby responsibility and the information of the standby responsibility borne by the responsible party in a bilateral transaction type standby market; receiving bilateral transaction requests of all market bodies, and performing bilateral transaction calculation by taking the standby responsibility among the market bodies as transaction objects according to the machine set of the responsible party of the standby responsibility, the standby responsibility information of the responsible party and the bilateral transaction requests of all the market bodies; and after the bilateral transaction is completed, distributing the calling task corresponding to the standby responsibility to each machine set corresponding to the market main body to complete the auxiliary service market transaction. The optimized allocation of power market resources is promoted, and the transaction efficiency is improved; the trading interval is expanded, the benefits of each party to trade are optimized, the market resources can be optimized and configured and integrated, and consumption of clean energy is facilitated.
Description
Technical Field
The invention belongs to the technical field of power system automation, and particularly relates to an auxiliary service market trading method and system for promoting clean energy consumption.
Background
At present, with the rapid development of clean energy and the gradual increase of direct trading proportion, the contradiction between the uncertainty of clean energy power generation and the rigid execution of direct trading contract becomes more and more prominent, and due to the lack of a corresponding market regulation mechanism, the safe, economic and effective operation of a power grid in the future faces a plurality of problems. The auxiliary service is a public service provided for a power grid by a power generation enterprise at extra operating cost and opportunity cost as an important guarantee for reliable power supply and stable market operation. The market-oriented auxiliary service calling principle is lacked, and the fair calling of the auxiliary service cannot be realized through market competition, so that part of power generation enterprises are influenced by the influence on enterprise profit due to the fact that too much auxiliary service is borne; the auxiliary service market mechanism needs to be established as soon as possible in the future electric power marketization reform, and the whole network consumption capability is mobilized by the auxiliary service marketization means to promote the consumption of clean energy. However, the new energy has volatility and uncertainty, and is difficult to adjust in real-time scheduling, and a large number of high-quality peak shaving resources are locked in direct electricity purchase transactions of large users, so that the contradiction of new energy consumption is further aggravated. Therefore, an auxiliary service market design method based on a bilateral trading mode is needed to promote optimal allocation of market resources and improve trading efficiency.
Disclosure of Invention
The invention provides an auxiliary service market trading method and system for promoting clean energy consumption, which are used for solving the contradiction problems that in the prior art, due to the fact that new energy has volatility and uncertainty, adjustment is difficult in real-time scheduling, a large number of high-quality peak shaving resources are locked in direct electricity purchasing trading of large users, new energy consumption is further aggravated, optimal allocation of market resources is promoted, and trading efficiency is improved.
An auxiliary service market trading method for promoting clean energy consumption comprises the following steps,
determining a machine set of a responsible party of the standby responsibility and the information of the standby responsibility borne by the responsible party in a bilateral transaction type standby market;
receiving bilateral transaction requests of all market bodies, and performing bilateral transaction calculation by taking the standby responsibility among the market bodies as transaction objects according to the machine set of the responsible party of the standby responsibility, the standby responsibility information of the responsible party and the bilateral transaction requests of all the market bodies;
and after the bilateral transaction is completed, distributing the calling task corresponding to the standby responsibility to each machine set corresponding to the market main body to complete the auxiliary service market transaction.
It is also preferable that the unit of the responsible party and the responsible standby responsibility thereof are obtained by a direct distribution method or a real value distribution method;
the direct dispense method comprises the steps of,
for a certain period of operation, spare responsibility is allocated according to equation (1):
in the formula (1), i is the number of the unit; n is the total number of the units; riSpare responsibility for the ith unit in the time period; pNiThe installed capacity of the ith unit; rGtotalTotal reserve responsibilities allocated among the generator groups for that period;
the real-valued assignment method includes the following steps,
in the day-ahead electric energy market, virtual trade optimization is carried out according to the constraint condition of power balance of the formula (2),
in the formula (2), PLtotalIs the total load demand; rGtotalTotal reserve responsibilities to be allocated among the generator groups for that period; p'OiThe virtual bid winning capacity of the unit i is set;
determining each of the electric energy markets before the day after virtual trade settlementVirtual medium winning capacity P 'of unit'OiAccording to formula (3) as P'OiThe numerical computer group of (a) should share the spare responsibility,
according to the virtual pre-medium winning capacity P 'in the formula (4)'OiThe capacity value after deducting the reserve responsibility is the actual winning capacity P of the unit in the electric energy marketOi，
It may also be preferable to use a bilateral trade matching method to match the spare responsibility trade in the market; when matching transaction is carried out, matching is carried out in different time periods: bidding in different time periods is processed according to time priority; bidding in the same time interval is carried out according to the order of price priority to quantity priority; if the price and the quantity are the same, matching is carried out according to the time sequence of entering the matching system.
It may also be preferable that,
the method further comprises: bilateral transaction matching processing; the bilateral transaction matching processing comprises the following steps:
matching a matching set according to the determined matching reference price;
determining a matched transaction amount according to the matching set;
determining a matched transaction price according to the transaction amount;
sending the matched transaction price to a market main body of the transaction;
after receiving the transaction confirmation of the market subject, a bilateral transaction is achieved.
It may also be preferred that in determining the matching reference price, Pb(V) Bidding function for buyer, Ps(C) For seller's asking price policy function, P0Taking the arithmetic mean of supply and demand curves for reference prices
And
the minimum value of (a) to (b),
keeping the bid P when the market is matchedb(V) greater than or equal to the matching reference price P0The buyer of (2) bidding, and keeping the asking price Ps(C) Less than or equal to the matching reference price P0The seller of (1) bid.
It may also be preferable to rank prices in the matching set such that P isb≥P0≥Ps，PbFor bidding the buyer, PsBidding prices for the seller; if the prices are the same in the sorting, sorting according to the quantity; if the quantity is the same, sequencing according to the time of entering the matching system; then, the potential transaction pairs are matched one by one according to the ranking results of bidding of the buyer and the seller, and a preliminary transaction pair set TAg is formed1(ii) a The number of the bids of the seller after matching is N1The number of bids of the buyer is N2Taking K as min (N)1,N2) Is provided with N1≤N2Then, formula (5):
TAg1＝{(s1,b1),(s2,b2),…,(si,bi),…,(sk,bk),bk+1,bk+2,…,bN2} (5)。
it may also be preferred that in determining the amount of matched transactions, in the transaction pair set TAg1If the supply and demand quantity of a certain transaction pair is equal, forming a formal transaction pair; if the demands of both transaction parties are not consistent with the supply quantity, the bids are split, the split and residual seller bids and buyer bids meet the matching and ordering rule of the formula (5), a transaction matching pair set is continuously formed, and all formal transaction pairs form a matching transaction pair set TAg; if the matching of the reported quantity in the bidding is not completed in the allowed times of splitting in the round of matching, the rest bidding after splitting directly enters the next round of matching, and the transaction pair in the TAg enters the transaction priceThe determination stage of (1).
It may also be preferable that in determining the price of a matched transaction, the price of the matched transaction is according to equation (6)
Wherein the content of the first and second substances,
Ps max、Ps minrespectively representing the highest and lowest asking prices of the sellers; pb max、Pb minRepresenting the highest and lowest bids, respectively, for the buyer.
It is also preferable that the real total calling reserve value is shared by all the units bearing the reserve responsibility according to the formula (11) in the same time period according to the proportion of the reserve responsibility,
in the formula (11), EtotalActually calling a total standby for a certain period of time; eiA standby calling value of the unit i in the time interval is obtained; riThe spare responsibility borne by the ith unit in the time interval;
setting a cycle period, after M calling cycle periods, setting a profit difference value delta C caused by the difference between a standby calling-in value and an actual calling value of a computer set i in the cycle period TTi(ii) a According to Δ C in the next cycle periodTiThe actual standby calling value of the unit i in the next cycle period is adjusted by the positive and negative values and the value of the standby calling value, and the standby calling value is delta CTi+ΔC(T+1)iApproaching zero as a target;
wherein the content of the first and second substances,
in the formula (12), EisThe spare value which should be called in the s time period in the cycle period T for the unit i is the E calculated according to the (11)i；EiosActual called value of s time interval in cycle period T for unit i；PsIs the spot price or real-time price of the electric energy market during the period s within the cycle period T.
An assisted services market trading system that facilitates clean energy consumption, comprising:
the information determining module is used for determining the unit of the responsible party of the standby responsibility and the information of the standby responsibility;
the transaction calculation module is used for receiving bilateral transaction requests of all market bodies, and performing bilateral transaction calculation by taking the standby responsibility among the market bodies as a transaction object according to the machine set of the responsible party of the standby responsibility and the standby responsibility information thereof and the bilateral transaction requests of all the market bodies;
and the calling task distribution module is used for distributing calling tasks corresponding to the standby responsibility to each machine set corresponding to the market main body after the bilateral transaction is achieved, so as to complete the auxiliary service market transaction.
The invention has the beneficial effects that:
the auxiliary service market trading method and system for promoting the consumption of clean energy can solve the contradiction problem that the consumption of new energy is further aggravated because the new energy has volatility and uncertainty and is difficult to adjust in real-time scheduling, and a large number of high-quality peak shaving resources are locked in the direct electricity purchase trading of a large user in the prior art, so that the optimal allocation of market resources is promoted, and the trading efficiency is improved; firstly, determining a responsible party of the standby responsibility and the allocation condition of the standby responsibility by a direct allocation method and a real value allocation method; after the reserve responsibility born by each market main body is definite, the market main bodies can use the reserve responsibility as a trading object to carry out bilateral trading; in order to solve the problem of low market efficiency of achieving bilateral trading by only relying on autonomous search among market members, a trading matching mechanism can be established, and an agency or a broker organizes trading to match the market, so that a trading interval is expanded, and the benefit of each party to trade is optimized; the spare responsibility bilateral transaction matching model provided by the invention does not relate to a large amount of complex calculation, and has relatively high transaction efficiency; from the optimization result of the whole spare responsibility bilateral transaction matching market (namely bilateral transaction matching market), the method can also play a role in promoting the optimal configuration and integration of market resources, and is favorable for the consumption of clean energy.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a diagram of a standby liability bilateral trade match flow for an assisted service market trading method for facilitating clean energy consumption in accordance with the present invention;
fig. 2 is a block diagram illustrating an auxiliary service market trading system for promoting clean energy consumption according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
Example 1
A method for facilitating the trade of an auxiliary service market for the consumption of clean energy, as shown in FIG. 1, comprises the steps of,
determining a machine set of a responsible party of the standby responsibility and the information of the standby responsibility borne by the responsible party in a bilateral transaction type standby market; determining a backup responsibility undertaker, wherein the backup is a public commodity serving all participants in the power market, and all market participants need to undertake certain backup responsibility; therefore, theoretically, power plants, large users, and power suppliers representing end users all assume standby responsibilities; allocating standby responsibility, wherein when the standby responsibility is allocated among the units on the power generation side, the main consideration is the difference of benefits brought to each unit by standby and the difference of potential influences of each unit on the system; a direct allocation method and a real value allocation method are proposed to allocate the spare responsibility among the units;
receiving bilateral transaction requests of all market bodies, and performing bilateral transaction calculation by taking the standby responsibility among the market bodies as transaction objects according to the machine set of the responsible party of the standby responsibility, the standby responsibility information of the responsible party and the bilateral transaction requests of all the market bodies; not only provides matched transaction service for a transaction main body, but also aims at maximizing self virtual income;
and after the bilateral transaction is completed, distributing the calling task corresponding to the standby responsibility to each machine set corresponding to the market main body to complete the auxiliary service market transaction. .
The auxiliary service market trading method for promoting the consumption of clean energy can effectively realize the reasonable organization and trading of the standby market and provide powerful reference for the construction of the auxiliary service market; firstly, a spare responsibility undertaker needs to be determined, and spare responsibility between two units is distributed through a direct distribution method and a real value distribution method; further establishing a standby responsibility bilateral transaction matching model, and realizing standby responsibility bilateral transaction; finally, a call for backup is made, i.e. how the call tasks are distributed to the individual groups when the system requires the market participant to fulfill the assumed backup responsibility.
Example 2
A method for facilitating the trade of an auxiliary service market for the consumption of clean energy, as shown in FIG. 1, comprises the steps of,
the information determining module receives input information and determines the unit of the responsible party of the standby responsibility and the information of the standby responsibility in the bilateral transaction type standby market; the input information is the unit of the responsible party of the standby responsibility and the information of the standby responsibility borne by the unit in the bilateral transaction type standby market; distributing auxiliary service responsibility, determining a responsible party of the standby responsibility and the standby responsibility thereof, and forming a premise of bilateral transaction;
when auxiliary service responsibility is distributed, the bilateral transaction matching mechanism is the same for the standby service and the automatic generation control service AGC, and in the bilateral transaction type standby market, the premise of bilateral transaction is to determine the undertaker of the standby responsibility and distribute the standby responsibility undertaken by the undertaker, and the power supplier of a power plant, a large user and a representative terminal user is determined as the undertaker of the standby responsibility.
It should be noted that in the determination of the backup responsibility undertaker, the backup is a form of insurance, and in the general sense of ensuring the safety of the power system, the power trading and the normal operation of the power supply, the backup is a common commodity serving all the participants in the power market, and all the market participants should undertake certain backup responsibility. In addition, due to the existence of factors such as errors between actual power generation and planned power generation of a unit, possible unit outage accidents, load prediction errors of a power supplier, load fluctuation on a load side and the like, the system needs to reserve in advance and possibly use spare capacity in the actual operation of the system, so theoretically, the power plant, a large user and the power supplier representing an end user all need to bear spare responsibility. In the distribution of the reserve responsibility, when the reserve responsibility is distributed among the units on the power generation side, the main consideration is the difference of the gains brought to each unit by the reserve and the difference of the potential influences of each unit on the system. The following two methods of allocating backup responsibilities among the units are proposed.
Wherein, when allocating the spare responsibility of the undertaker of the spare responsibility, a direct allocation method can be adopted, the direct allocation method comprises the following steps,
for a certain period of operation, spare responsibility is allocated according to equation (1):
in the formula (1), i is the number of the unit; n is the total number of the units; riSpare responsibility for the ith unit in the time period; pNiThe installed capacity of the ith unit; rGtotalThe total back-up responsibilities allocated among the generator groups for that period.
In the first step, when the reserve responsibility of the responsible undertaker is distributed by adopting a direct distribution method, when the day-ahead electric energy market exists, the direct distribution of the reserve responsibility is completed before the day-ahead electric energy market is opened; after the reserve responsibility is distributed, the unit transfers the reserve responsibility before the electric energy market is opened, and at the moment, the unit balances the income difference of two modes that the unit bears the reserve responsibility and purchases other people to reserve and utilize the capacity of the unit to participate in the electric energy market; the maximum capacity of the unit bearing the reserve responsibility participating in competition in the electric energy market is the difference value between the installed capacity and the reserve responsibility; after the electric energy market is finished, the units which cannot fulfill the reserve responsibility because the electric energy market is not bid for a bid carry out the transfer of the reserve responsibility through free trading or matching the market through bilateral trading.
It should be noted that the direct partitioning method is mainly considered as follows: the same gains from normal operation of the system and normal operation of the market are obtained for units of the same capacity, and the same potential impact on the system is also obtained, so the same contribution should be made, and the same backup responsibility is assumed. The method is beneficial to ensuring the abundance of the long-term spare capacity of the system; the calculation method is simple and easy to accept.
Alternatively, a real-value allocation method may be used when allocating the backup responsibility of the responsible party, the real-value allocation method including the steps of,
at a certain time, if the winning bid capacity of the unit with the same installed capacity in the electric energy market is different day ahead or the average load rate determined according to the power generation plan is different, the profit obtained from the market and the influence on the market are different, so the backup responsibility assumed is different. The direct partitioning method described above does not take this into account.
In fact, the load of the unit determines the amount of income it receives from the whole market, and at the same time, the potential influence degree of the accident that it may happen on the system power balance is indicated, so the spare responsibility should be distributed according to the actual load of the unit in the time period.
When no day-ahead electric energy market exists, the generation plan can be made, and the standby responsibility born by the unit is determined, such as bearing in proportion to the generation load.
If the day-ahead electric energy market exists, the actual load that the generator set will carry cannot be ascertained before the electric energy market is opened, and therefore, the backup responsibility cannot be allocated in advance as in the direct allocation method. To solve the problem, in the day-ahead electric energy market, virtual trade optimization is carried out according to the constraint condition of power balance of the formula (2),
in the formula (2), PLtotalIs the total load demand; rGtotalTotal reserve responsibilities to be allocated among the generator groups for that period; p'OiThe virtual bid winning capacity of the unit i is set;
after the virtual trade settlement of the day-ahead electric energy market, the virtual medium-winning capacity P 'of each unit is determined'OiAccording to formula (3) as P'OiThe numerical computer group of (a) should share the spare responsibility,
according to the virtual pre-medium winning capacity P 'in the formula (4)'OiThe capacity value after deducting the reserve responsibility is the actual winning capacity P of the unit in the electric energy marketOi，
Matching auxiliary service responsibility, calling the unit of the undertaker of the standby responsibility stored in the storage and the assumed standby responsibility information thereof by the processor, and performing bilateral transaction calculation by taking the standby responsibility between market bodies as a transaction object;
in this case, if the market entities perform bilateral trading with the reserve responsibility as a trading target after the reserve responsibility assumed by each market entity is clear, the market entities perform free bilateral trading with the reserve responsibility as a trading target after the reserve responsibility assumed by each market entity is clear.
I.e., participants search the market for a possible solution space with a common goal of reaching a consensus. Because the efficiency of the bilateral transaction negotiation process is influenced by the knowledge, the target and the preference of participants, and because of the information closure among market participants, the transaction interval is possibly smaller only depending on the free bilateral transaction among market members, thereby losing some potential valuable transactions, and the finally formed overall optimization result of the market is not necessarily optimal. Therefore, by establishing a transaction matching mechanism, an agency or a broker organizes transactions to match the market, so as to expand the transaction interval and realize the optimization of the benefits of each transaction party.
To solve the market inefficiency problem of achieving bilateral trading by relying solely on autonomous searches among market members, a bilateral trade matching market (also known as a bilateral trade matching market) may be established, with market operators matching the spare responsible trades in the market.
The transaction matching refers to a transaction main body (a seller main body and a buyer main body), and group activities of transaction tasks are completed by the matching main body in a market matching environment by using a matching transaction strategy and using a matching transaction tool.
Establishing a spare responsibility transaction matching mechanism, defining a matching transaction main body, and taking the matching transaction main body as a power dispatching center in a spare responsibility matching market. It not only provides the trading subject with the trade matching service, but also aims at maximizing the virtual profit of the trading subject. And the maximization of the virtual profit is realized by maximizing the transaction amount, namely, facilitating the transaction between transaction subjects as much as possible. For this reason, the matching subject considers the maximization of the self income and also considers the maximization and the balance of the income of both trading parties.
The equipment's transferor of responsibility, i.e. the buyer of purchasing the backup service, has an estimate of the backup value of V and a bidding strategy function of Pb(V); the transfer party of the spare responsibility, namely the seller selling the spare service estimates the spare cost as C, and the asking price strategy function is Ps(C)；
In the transaction matching process, a transaction main body does not need to search a transaction partner independently, and the matching main body performs transaction pair matching according to market information and a strategy of maximizing a transaction interval and optimizing multi-party income, so that a transaction model is facilitated. The most important match factors in the match transaction model are: bidding time, transaction price, and transaction quantity.
When matching transaction is carried out, matching is carried out in different time periods, bidding is carried out in different time periods, and priority processing is carried out according to time; bidding in the same time interval is carried out according to the order of price priority to quantity priority; if the price and the quantity are the same, the matching is carried out according to the time (namely bidding time) of entering the matching system.
In addition, when matching the auxiliary service responsibility, establishing a bilateral trade matching market, matching the spare responsibility trade in the market by the market operator, and matching the spare responsibility trade in the market by the market operator, comprises the following steps,
first, a matching reference price is determined, which is primarily to eliminate those parties that do not meet the basic condition that the bid is greater than or equal to the ask in each round of matching.
Since the transaction is conducted in a virtual market environment consisting of M sellers, N buyers and a transaction matching body, the offers of the sellers and buyers in the same time period form a market supply and demand curve. Under the equilibrium strategy, the bid price function of the buyer and the ask price strategy function of the seller have strict monotonicity, and P is used for expanding the transaction interval as much as possibleb(V) Bidding function for buyer, Ps(C) For seller's asking price policy function, P0Taking the arithmetic mean of supply and demand curves for reference prices
And
the minimum value of (a) to (b),
keeping the bid P when the market is matchedb(V) greater than or equal toAt matching reference price P0The buyer of (2) bidding, and keeping the asking price Ps(C) Less than or equal to the matching reference price P0The seller bidding; the rest bidding enters the next round of clearing and matching or withdrawal; once the reference price is determined, the basic matching set of matches can be determined based on the buyer's bid and seller's ask with the matching reference price.
Secondly, matching a matching set, wherein in each matching round, all buyers with bids larger than or equal to a matching reference price bid Pb≥P0Rank from high to low according to bid; all seller bids P with the asking price less than or equal to the matching reference prices≤P0Ordering according to the price from low to high, thereby ensuring Pb≥P0≥Ps(ii) a If the prices are the same in the respective ranks, the bids are ranked from high to low in number, or the bids of the seller are ranked from high to low in number, and the bids of the buyer are ranked from low to multiple ranks in number; if the quantity is the same, sequencing according to the time of entering the matching system; then, the potential transaction pairs are matched one by one according to the ranking results of bidding of the buyer and the seller, and a preliminary transaction pair set TAg is formed1(ii) a Setting the number of the bids of the seller after matching to be N1The number of bids of the buyer is N2Taking K as min (N)1,N2) Is provided with N1≤N2Then, formula (5):
TAg1＝{(s1,b1),(s2,b2),…,(si,bi),…,(sk,bk),bk+1,bk+2,…,bN2} (5)
thirdly, determining the matched transaction amount, and collecting TAg in the transaction pair1If the supply and demand quantity of a certain transaction pair is equal, forming a formal transaction pair; if the demands of both transaction parties are not consistent with the supply quantity, the bids need to be split, for the split and residual seller bids and buyer bids, the matching and ordering rules of the formula (5) are satisfied, a transaction matching pair set is continuously formed, and all formal transaction pairs form a matching transaction pair set TAg; if the matching of the reported number in the bidding is not completed in the allowed times of splitting in the round of matching, the rest after splittingBidding directly enters the next round of matching, and the transaction pair in the TAg enters a stage of determining the transaction price;
finally, a price is determined for the trade, which is typically determined for a traditional trade match according to equation (6.1):
P＝kPb+(1-k)Ps(6.1)
wherein P is the price of the matched transaction, PbAnd PSK ∈ [0,1 ] respectively representing matching transaction bid and offer]Is a constant, usually 0.5, and the price of the matching transaction is the average of the prices of the matching parties according to equation (6),
in order to promote the bidding strategies of all the buyer and seller to use the actual price as the optimal selection, the maximum and minimum prices of the seller asking price and the buyer asking price after the market match are introduced into the matching transaction price determination of the formula (6), and the formula (7) and the formula (8) are obtained,
wherein, Ps max、Ps minRespectively representing the highest and lowest asking prices of the sellers; pb max、Pb minRespectively representing the highest and lowest bids of the buyer;
the price of the matched transaction is determined according to equation (9),
order to
Substituting into formula (9) to obtain formula (10),
matching prices, in addition to matching the buyer's bid and seller's bid for both parties to the transaction, also adds information throughout the bilateral trading market. When the difference between the highest bid price and the lowest bid price in the seller bid collection is larger than or equal to the difference between the highest bid price and the lowest bid price in the buyer bid collection, the profit of the buyer is increased by being less than or equal to 0, and the buyer is benefited. On the contrary, the income of the seller is increased and is beneficial to the seller. Therefore, between buyers or sellers in the bidding competition, there is both competition and rational quotation, i.e., selection of the true price strategy.
The spare responsibility transaction matching model does not involve a large amount of complex calculation, and the transaction efficiency is relatively high. And the optimization result of the whole spare responsibility bilateral transaction matching market can also play a role in promoting the optimal configuration and integration of market resources.
And after the bilateral transaction is completed, distributing the calling task corresponding to the standby responsibility to each machine set corresponding to the market main body to complete the auxiliary service market transaction.
The method comprises the following steps of calling auxiliary services, when a system needs a market participant to fulfill the assumed spare responsibility, and allocating calling tasks to each unit, wherein the principle of the spare calling is that firstly, the spare responsibility assumption party ensures that spare capacity equivalent to assumed responsibility value is available all the time, or the spare capacity comes from the unit of the spare responsibility assumption party or is purchased from other market members; the responsibility undertaker reports the transfer condition of the standby responsibility to the dispatching center within the time limit;
since whether the unit takes on the backup responsibility and whether the responsibility can be really fulfilled when the system needs the unit needs to be checked through the actual call of the backup, and meanwhile, the actual call of the backup can make the unit obtain a certain gain of the generated energy, the call of the backup should adhere to the principle of looking at all the backup providers at the same time from both aspects.
The calling method shares the actual total calling reserve value for all the units bearing the reserve responsibility in the same time period according to the formula (11) according to the proportion of the reserve responsibility,
in the formula (11), EtotalActually calling a total standby for a certain period of time; eiA standby calling value of the unit i in the time interval is obtained; riThe spare responsibility borne by the ith unit in the time period is the spare responsibility borne by the ith unit finally after the spare responsibility is transferred and traded;
in the actual operation of the system, the demand of the actual regulating speed of the unit and the like is also considered for the standby calling, so that all the units bearing the standby responsibility cannot be guaranteed to obtain the actual calling value determined according to the formula in the same time period. Therefore, the standby responsibility bearing individuals can be divided into the standby total call amount equally in time on the basis of the time division of the standby total call amount. In fact, if the price of the electric energy after the backup call is different at each time interval, the unit that assumes the same backup responsibility receives different gains due to the increase in the electric energy generated. Therefore, the influence of the electric energy price after the standby is called on the unit yield should be taken into consideration when the time is averaged. Generally, the electric energy price after the standby is called is the spot price or the real-time price of the electric energy market in the period of time. When no electric energy market exists day before, the time-interval difference of the electric energy price is not needed to be considered, and only the difference of the batch and reply electricity prices of the unit is considered.
And particularly, the improved calling method mainly takes the influence of the time interval difference of the electric energy price after the standby is called on the unit income into consideration, and the time-based equal calling of the standby duty calling amount is carried out. The calling method takes a week or a month as a cycle period, the cycle period is integral multiple of the period, the income difference value caused by the difference between the calling value and the real calling value of a certain unit standby in the cycle period is accumulated, the calculation is carried out according to the formula (12) of the cycle period T containing M periods,
in the formula (12), Δ CTiA profit difference value caused by the difference between the standby calling value and the actual calling value of the unit i in the cycle period T is obtained; eisThe spare value which should be called in the s time period in the cycle period T for the unit i is the E calculated according to the (11)i；EiosActually called values of the unit i in the s time period in the cycle period T; psIs the spot price or real-time price of the electric energy market during the s time period within the cycle period T;
calculating Δ CTiThereafter, in accordance with Δ C, during the next cycleTiThe actual standby calling value of the unit i in the next cycle period is adjusted by the positive and negative values and the value of the standby calling value, and the standby calling value is delta CTi+ΔC(T+1)iApproaching zero is the target. Thus, for each time interval, the actual standby call value of the unit is determined by taking into account both the actual needs of the system and the cumulative values of previous cycle periods. Therefore, continuous rolling balance and adjustment are carried out to ensure that the actual income and the due income of the generated energy generated by the standby calling unit are balanced in a longer period.
In the auxiliary service market transaction method for promoting clean energy consumption, the auxiliary service is used as an important guarantee for reliable power supply and stable market operation, and is a public service provided for a power grid by power generation enterprises at extra operation cost and opportunity cost. The market-oriented auxiliary service calling principle is lacked, and the fair calling of the auxiliary service cannot be realized through market competition, so that part of power generation enterprises influence the profit of the enterprises due to the fact that too many auxiliary services are borne; the auxiliary service cost sharing is unfair due to the lack of marketized auxiliary service compensation and cost sharing mechanisms and difficulty in truly measuring and reflecting the value of the auxiliary service. Therefore, in future electric power marketization innovation, an auxiliary service market mechanism needs to be established as soon as possible, and the whole network consumption capability is mobilized by an auxiliary service marketization means to promote the consumption of clean energy. For supplementary services, the market is a buyer monopolized market, i.e. only one buyer (i.e. the system operator SO). This structure allows the buyer to set a price that people consider fair. However, the auxiliary service is intended to ensure the safety and continuity of supply and demand, and therefore it is necessary to provide these support functions, which manufacturers must be willing to provide. And therefore, market design must strike a balance between system economic efficiency and generator profit. The bilateral trading mode-based auxiliary service market of the present embodiments helps to cope with intermittent and fluctuating impacts of renewable energy sources and maintain system security in a cost-effective manner. In turn, the uncertainty in dealing with renewable energy production has prompted the consumption of renewable energy, and thus the development of renewable energy technology.
The present invention also provides an auxiliary service market trading system for promoting clean energy consumption, the system comprising: a processor and a memory coupled to the processor, the memory storing a computer program which, when executed by the processor, performs the method steps of the above-described method for design of an assistive service market based on bilateral trading mode.
The invention provides two auxiliary service market bidding optimization methods which are respectively suitable for two basic modes of distributed type and centralized type of an electric power wholesale market. The method and the system for optimizing the bidding of the auxiliary service market can be used for selecting the type of spot service and building the auxiliary service market, can reflect the value of the auxiliary service, reasonably share the auxiliary service cost and promote the consumption of clean energy.
Referring to fig. 2, the present invention provides another auxiliary service market trading system for promoting clean energy consumption, including:
the information determining module is used for determining the unit of the responsible party of the standby responsibility and the information of the standby responsibility;
the transaction calculation module is used for receiving bilateral transaction requests of all market bodies, and performing bilateral transaction calculation by taking the standby responsibility among the market bodies as a transaction object according to the machine set of the responsible party of the standby responsibility and the standby responsibility information thereof and the bilateral transaction requests of all the market bodies;
and the calling task distribution module is used for distributing calling tasks corresponding to the standby responsibility to each machine set corresponding to the market main body after the bilateral transaction is achieved, so as to complete the auxiliary service market transaction.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. An auxiliary service market transaction method for promoting clean energy consumption is characterized by comprising the following steps,
determining a machine set of a responsible party of the standby responsibility and the information of the standby responsibility borne by the responsible party in a bilateral transaction type standby market;
receiving bilateral transaction requests of all market bodies, and performing bilateral transaction calculation by taking the standby responsibility among the market bodies as transaction objects according to the machine set of the responsible party of the standby responsibility, the standby responsibility information of the responsible party and the bilateral transaction requests of all the market bodies;
and after the bilateral transaction is completed, distributing the calling task corresponding to the standby responsibility to each machine set corresponding to the market main body to complete the auxiliary service market transaction.
2. The market trading method for auxiliary services to promote clean energy consumption according to claim 1, wherein the unit of the responsible party and the responsible standby responsibility are obtained by a direct distribution method or a real-value distribution method;
the direct dispense method comprises the steps of,
for a certain period of operation, spare responsibility is allocated according to equation (1):
in the formula (1), i is the number of the unit; n is the unitThe total number of (c); riSpare responsibility for the ith unit in the time period; pNiThe installed capacity of the ith unit; rGtotalTotal reserve responsibilities allocated among the generator groups for that period;
the real-valued assignment method includes the following steps,
in the day-ahead electric energy market, virtual trade optimization is carried out according to the constraint condition of power balance of the formula (2),
in the formula (2), PLtotalIs the total load demand; rGtotalTotal reserve responsibilities to be allocated among the generator groups for that period; p'OiThe virtual bid winning capacity of the unit i is set;
after the virtual trade settlement of the day-ahead electric energy market, the virtual medium-winning capacity P 'of each unit is determined'OiAccording to formula (3) as P'OiThe numerical computer group of (a) should share the spare responsibility,
according to the virtual pre-medium winning capacity P 'in the formula (4)'OiThe capacity value after deducting the reserve responsibility is the actual winning capacity P of the unit in the electric energy marketOi，
3. A method of facilitating market trading of clean energy according to claim 1, wherein a bilateral trade match method is used to match the trade of reserve liability in the market; when matching transaction is carried out, matching is carried out in different time periods: bidding in different time periods is processed according to time priority; bidding in the same time interval is carried out according to the order of price priority to quantity priority; if the price and the quantity are the same, matching is carried out according to the time sequence of entering the matching system.
4. The method of facilitating a market for ancillary services of clean energy consumption of claim 1 wherein the method further comprises: bilateral transaction matching processing; the bilateral transaction matching processing comprises the following steps:
matching a matching set according to the determined matching reference price;
determining a matched transaction amount according to the matching set;
determining a matched transaction price according to the transaction amount;
sending the matched transaction price to a market main body of the transaction;
after receiving the transaction confirmation of the market subject, a bilateral transaction is achieved.
5. The method of claim 4, wherein the matching reference price is determined by Pb(V) Bidding function for buyer, Ps(C) For seller's asking price policy function, P0Taking the arithmetic mean of supply and demand curves for reference prices
And
the minimum value of (a) to (b),
keeping the bid P when the market is matchedb(V) greater than or equal to the matching reference price P0The buyer of (2) bidding, and keeping the asking price Ps(C) Less than or equal to the matching reference price P0The seller of (1) bid.
6. The method of claim 5, wherein the price in the matching set is rankedSequence of Pb≥P0≥Ps，PbFor bidding the buyer, PsBidding prices for the seller; if the prices are the same in the sorting, sorting according to the quantity; if the quantity is the same, sequencing according to the time of entering the matching system; then, the potential transaction pairs are matched one by one according to the ranking results of bidding of the buyer and the seller, and a preliminary transaction pair set TAg is formed1(ii) a The number of the bids of the seller after matching is N1The number of bids of the buyer is N2Taking K as min (N)1,N2) Is provided with N1≤N2Then, formula (5):
TAg1＝{(s1,b1),(s2,b2),…,(si,bi),…,(sk,bk),bk+1,bk+2,…,bN2} (5)。
7. the method of claim 6, wherein in determining the matching transaction amount, the transaction pair set TAg is used1If the supply and demand quantity of a certain transaction pair is equal, forming a formal transaction pair; if the demands of both transaction parties are not consistent with the supply quantity, the bids are split, the split and residual seller bids and buyer bids meet the matching and ordering rule of the formula (5), a transaction matching pair set is continuously formed, and all formal transaction pairs form a matching transaction pair set TAg; if the matching of the reported quantity in the bidding is not completed in the allowed times of the splitting in the round of matching, the remaining bidding after the splitting directly enters the next round of matching, and the transaction pair in the TAg enters the stage of determining the transaction price.
8. The auxiliary service market trading method for promoting clean energy consumption of claim 7, wherein in determining the price of the matched trade, the price of the matched trade is according to equation (6)
Wherein the content of the first and second substances,
Psmax、Psminrespectively representing the highest and lowest asking prices of the sellers; pbmax、PbminRepresenting the highest and lowest bids, respectively, for the buyer.
9. The market trading method for assisting in the consumption of clean energy according to claim 1, wherein the real total calling reserve value is shared by all the units with reserve responsibility according to the formula (11) in the same time period according to the proportion of the reserve responsibility,
in the formula (11), EtotalActually calling a total standby for a certain period of time; eiA standby calling value of the unit i in the time interval is obtained; riThe spare responsibility borne by the ith unit in the time interval;
setting a cycle period, after M calling cycle periods, setting a profit difference value delta C caused by the difference between a standby calling-in value and an actual calling value of a computer set i in the cycle period TTi(ii) a According to Δ C in the next cycle periodTiThe actual standby calling value of the unit i in the next cycle period is adjusted by the positive and negative values and the value of the standby calling value, and the standby calling value is delta CTi+ΔC(T+1)iApproaching zero as a target;
wherein the content of the first and second substances,
in the formula (12), EisThe spare value which should be called in the s time period in the cycle period T for the unit i is the E calculated according to the (11)i；EiosActually called values of the unit i in the s time period in the cycle period T; psIs the spot price or real-time price of the electric energy market during the period s within the cycle period T.
10. An assisted services market trading system for facilitating clean energy consumption, comprising:
the information determining module is used for determining the unit of the responsible party of the standby responsibility and the information of the standby responsibility;
the transaction calculation module is used for receiving bilateral transaction requests of all market bodies, and performing bilateral transaction calculation by taking the standby responsibility among the market bodies as a transaction object according to the machine set of the responsible party of the standby responsibility and the standby responsibility information thereof and the bilateral transaction requests of all the market bodies;
and the calling task distribution module is used for distributing calling tasks corresponding to the standby responsibility to each machine set corresponding to the market main body after the bilateral transaction is achieved, so as to complete the auxiliary service market transaction.
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