CN111950800A - Method, system, equipment and readable storage medium for market clearing before electric power spot goods day - Google Patents
Method, system, equipment and readable storage medium for market clearing before electric power spot goods day Download PDFInfo
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Abstract
The invention belongs to the field of electric power markets, and discloses a method, a system, equipment and a readable storage medium for market clearing before the spot-shipment of electric power, which comprises the steps of obtaining declaration information and operation boundary conditions of a power grid; determining the maximum declared power generation capacity of the power grid according to the operating state of each device in the power grid in the next day, and checking the declared information of the power grid according to the maximum declared power generation capacity; according to the declaration information passing the verification and the operation boundary conditions of the power grid, performing market ground state clearing in the future, correcting a future state network model according to a ground state clearing result, obtaining a future state section quota of the power grid according to the ground state clearing result, and correcting the operation boundary conditions of the power grid according to the future state section quota; and according to the declaration information passing the verification and the corrected operation boundary conditions, performing the market clearing in the future. The operation boundary condition is corrected through the maximum reported generating capacity verification reporting information and the future state section quota, so that an accurate clearing condition is provided, and the accuracy and the reasonability of a clearing result are improved.
Description
Technical Field
The invention belongs to the field of electric power markets, and relates to a method, a system, equipment and a readable storage medium for clearing an electric power spot market in the day ahead.
Background
The clearing of the electric power spot market before the day is based on market member declaration information and power grid operation boundary conditions, optimized calculation is carried out by adopting a safety constraint device combination and a safety constraint economic dispatching program, and the clearing is carried out to obtain a spot market trading result before the day. Therefore, the validity of the declaration of the market member and the accuracy of the operation boundary condition of the power grid are the key points of the rationality and the accuracy of the clearing result of the market in the future.
However, the existing clearing process of the electric power spot-shipment day-ahead market is usually based on declaration data which only meets simple verification of declaration rules and a network model which is not fine enough, and actual clearing results of the electric power spot-shipment day-ahead market cannot be truly and reliably reflected. In addition, section quota information is needed to be adopted when the operation boundary condition of the power grid is determined, at present, the section quota generally adopts fixed quota or inherits the quota result of the previous day, but the power grid operation mode is variable, the section quota changes greatly along with the topology and the current of the power grid, the accuracy of the section quota and the safety of the power grid cannot be guaranteed in such a mode, the operation boundary condition of the power grid is inaccurate, and the accuracy and the rationality of the market clearing result before the current date of the power grid are poor.
Disclosure of Invention
The invention aims to overcome the defects of poor accuracy and reasonableness of the market clearing result before the spot date in the prior art, and provides a method, a system, equipment and a readable storage medium for clearing the market before the spot date of electric power.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
in a first aspect of the invention, a method for market clearing of electric power spot goods before the day comprises the following steps:
acquiring declaration information and operation boundary conditions of a power grid;
acquiring the operating state of each device in the power grid in the next day, determining the maximum declared power generation capacity of the power grid according to the operating state of each device in the power grid in the next day, and checking declaration information of the power grid according to the maximum declared power generation capacity;
based on a future state network model of the power grid, performing day-ahead market ground state clearing by using a power generation cost minimization optimization target according to declaration information passing verification and operation boundary conditions of the power grid to obtain a ground state clearing result;
correcting a future state network model according to the ground state clearing result, obtaining a future state section limit of the power grid according to the ground state clearing result, and correcting the operation boundary condition of the power grid according to the future state section limit;
and based on the corrected future state network model, performing the daily market clearing by using the minimization of the power generation cost as an optimization target according to the declaration information passing the verification and the corrected operation boundary condition to obtain a clearing result.
The invention further improves the method for market clearing before the current electric power goods day:
the operation state of each device in the power grid in the next day is acquired by adopting the following mode: acquiring operation data of a power grid and the current operation state of each device in the power grid; the operation data comprises an equipment operation plan, an equipment retirement plan, an equipment power failure maintenance plan and a bus board receiving mode; constructing a network topology according to the operation data, and determining the operation state of each device in the next day based on the logic relationship of the network topology and the current operation state of each device; wherein the operation state comprises maintenance, fault accompanying, maintenance accompanying, available and island available.
The specific method for determining the maximum declared power generation capacity of the power grid according to the operating state of each device in the power grid in the next day comprises the following steps of: determining the operation state of each device in the power grid according to the operation state of each device in the next day; determining the maximum output of each device according to the running state of each device, and superposing the maximum outputs of all the devices to obtain the maximum declared power generation capacity of the power grid; when the maximum value of the power generation capacity of the power grid in the declaration information is not greater than the maximum declaration power generation capacity, the declaration information passes the verification; otherwise, the declaration information is not checked to be passed.
The method also comprises a ground state clearing safety checking step: obtaining a ground state sensitivity matrix of the power grid according to a future state network model of the power grid; when the ground state tide data in the ground state clearing result exceeds a preset ground state tide margin range, adjusting the output of each device in the power grid according to the ground state sensitivity matrix, updating the operation boundary conditions of the power grid according to the output of each device, clearing the ground state of the market at present again, and updating the current ground state clearing result; otherwise, outputting a ground state clearing result; further comprises a clear safety check step: obtaining a sensitivity matrix of the power grid according to the corrected future state network model; when the power flow data in the clearing result exceeds a preset power flow margin range, adjusting the output of each device in the power grid according to the sensitivity matrix, updating the corrected operation boundary conditions according to the output of each device, performing the day-ahead market clearing again, and updating the current clearing result; otherwise, outputting a clear result.
The specific method for obtaining the future state section quota of the power grid according to the ground state clearing result comprises the following steps: obtaining ground state power flow data of each device in the power grid according to the ground state clearing result; and acquiring equipment contained in each section of the power grid based on the corrected future state network model, superposing ground state power flow data of the equipment contained in each section by each section to obtain the section quota of each section, and collecting the section quotas of all the sections together to obtain the future state section quota of the power grid.
The specific method for correcting the operation boundary conditions of the power grid according to the future state section quota comprises the following steps: based on the corrected future state network model, calculating according to the future state section quota to obtain the future state bus load prediction and the future state tie line plan of the power grid; and replacing the section quota in the operation boundary condition with the future state section quota, replacing the bus load prediction in the operation boundary condition with the future state bus load prediction, and replacing the tie line plan in the operation boundary condition with the future state tie line plan to obtain the corrected operation boundary condition.
The method also comprises the following steps of AC power flow safety check: calculating alternating current power flow data of the power grid according to the corrected operation boundary conditions based on the corrected future state network model, adjusting the output of each device in the power grid when the alternating current power flow data exceeds the preset alternating current power flow margin range, updating the corrected future state network topology model, the future state section quota and the corrected operation boundary conditions according to the output of each device, then performing the daily market ground state clearing according to the verified declaration information and the corrected operation boundary conditions of the power grid based on the corrected future state network model and by using the power generation cost minimization as the optimization target, and updating the ground state clearing result; otherwise, based on the corrected future state network model, according to the declaration information passing the verification and the corrected operation boundary conditions, the day-ahead market clearing is carried out by taking the power generation cost minimization as an optimization target, and a clearing result is obtained.
In a second aspect of the present invention, an electric power spot day-ahead market clearing system includes:
the information acquisition module is used for acquiring declaration information and operation boundary conditions of the power grid;
the reporting information checking module is used for acquiring the operating state of each equipment in the power grid in the next day, determining the maximum reporting power generation capacity of the power grid according to the operating state of each equipment in the power grid in the next day, and checking the reporting information of the power grid according to the maximum reporting power generation capacity;
the ground state clearing module is used for clearing the ground state of the market in the day ahead according to the declaration information passing the verification and the operation boundary conditions of the power grid based on a future state network model of the power grid by using the minimization of the power generation cost as an optimization target to obtain a ground state clearing result;
the operation boundary condition correction module is used for correcting a future state network model according to the ground state clearing result, obtaining a future state section limit of the power grid according to the ground state clearing result and correcting the operation boundary condition of the power grid according to the future state section limit; and
and the clearing module is used for clearing the market in the future based on the corrected future state network model according to the declaration information passing the verification and the corrected operation boundary conditions by using the electricity generation cost minimization as an optimization target to obtain a clearing result.
In a third aspect of the present invention, a terminal device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the above-mentioned electric power spot day-ahead market clearing method when executing the computer program.
In a fourth aspect of the present invention, a computer-readable storage medium stores a computer program which, when executed by a processor, implements the steps of the above-described electric power spot day-ahead market clearing method.
Compared with the prior art, the invention has the following beneficial effects:
according to the method for clearing the market before the current electric power goods day, the operation state of each device in the power grid in the next day is obtained, and compared with the existing two states of operation and outage, the operation condition of the device can be more accurately determined, the accurate output condition of each device is obtained, the accurate maximum power generation capacity declaration of the power grid is further obtained, the more accurate power generation capacity declaration constraint is realized, and a more accurate safety constraint boundary is provided for the market clearing before the current electric power goods day; meanwhile, based on the division of multiple states, the accuracy of judging the operating state of each device in the next day is greatly improved, and the refinement level of a future state network model of the power grid is improved. Meanwhile, ground state clearing is carried out through a future state network model based on the power grid, declaration information and operation boundary conditions to obtain a ground state clearing result, then the future state network topology model of the power grid is corrected through the ground state clearing result, then the future state section quota is determined according to the corrected future state network topology model and the ground state clearing result, the operation boundary conditions are corrected through the future state section quota, and accuracy of the operation boundary conditions is improved. And further, based on the corrected future state network model, the day-ahead market clearing calculation is carried out according to the declaration information passing the verification and the corrected operation boundary conditions to obtain a final clearing result, and the accuracy and the rationality of the day-ahead market clearing result are effectively improved.
Furthermore, the running states of all the devices in the power grid are finely divided, the running states comprise various states of maintenance, fault accompanying and stopping, maintenance accompanying and stopping, availability and island availability, a running state division mode is provided, the accuracy of the output condition of all the devices is further improved based on multi-state division, and the more accurate maximum power generation reporting capability is obtained.
Further, after the operation boundary condition is corrected, alternating current power flow data of the power grid is calculated according to the corrected operation boundary condition based on the future state network topology model, when the alternating current power flow data exceeds a preset alternating current power flow margin range, the output of each device in the power grid is adjusted, future state section quota determination and operation boundary condition correction are carried out again, the accuracy of the operation boundary condition is further improved through alternating current and direct current iterative correction, the device out-of-limit condition is eliminated as far as possible, and the accuracy of the current market clearing result is improved.
Drawings
FIG. 1 is a block diagram of a method for spot-on-date market clearing of electricity in accordance with an embodiment of the present invention;
FIG. 2 is a block diagram illustrating the detailed flow of a method for market removal of the power spot date in accordance with an embodiment of the present invention;
FIG. 3 is a block diagram of a method for market removal of the power spot date in accordance with yet another embodiment of the present invention;
FIG. 4 is a block diagram of a method for market removal of the power spot date in accordance with yet another embodiment of the present invention;
fig. 5 is a block diagram of a power spot market removal system in accordance with yet another embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
First, terms related to the present invention are explained.
Market day ahead: and an electric energy trading market for determining the equipment combination state and the power generation plan on the operation day (D-1 day) in advance.
Market declaration: the market main body declares various data information including static attribute registration data, operation technical parameters, economic parameters and the like in a specified time range according to the requirements of the spot market.
The market is clear: the electric power market determines the transaction amount and price through competitive pricing according to market rules.
Safety restraint device combination: under the condition of meeting the safety constraint of the power system, a multi-period equipment starting and stopping plan is made by taking the maximization of social welfare or the minimization of the total power supply cost of the system as optimization targets.
Safety constraint economic dispatch: under the condition of meeting the safety constraint of the power system, a multi-period equipment power generation plan is made by taking the maximization of social welfare or the minimization of the total power supply cost of the system as optimization targets.
And (4) safety checking: and analyzing the safety process of the power system from the aspect of the operation safety of the power system for the contents of the maintenance plan, the power generation plan, the market clearing result, the power grid operation and the like. The analysis method comprises static safety analysis, transient stability analysis, dynamic stability analysis, voltage stability analysis and the like.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, in an embodiment of the present invention, a method for clearing a market before a current date of electric power is provided, in which operation states of each device in a power grid are divided into maintenance, failure accompanying, maintenance accompanying, available, and island available, and further a maximum declared power generation capacity of the power grid is determined according to a next-day operation state of each device in the power grid, so as to realize constraint on declared power generation capacity of a power plant and provide a network topology for dc sensitivity calculation, a future state network model is modified based on a future state network model of the power grid and a ground state clearing result provided by first optimization clearing, and a future state network model and a smart section are interacted to realize future state section quota determination, an operation boundary condition of the power grid is modified based on an ac power flow modification model, a more accurate operation boundary condition is provided for clearing the market before the current date of electric power, a modified future state network model and a more accurate operation boundary condition that can reflect a true condition of the power grid are provided for clearing the market before the current date of electric power, the method is beneficial to obtaining more reasonable and accurate electric power spot market clearing results in the day ahead, and provides technical support for the deep innovation of the electric power market. Specifically, the electric power spot market clearing method comprises the following steps.
S1: and acquiring declaration information and operation boundary conditions of the power grid.
Specifically, in order to analyze and process the power grid, various data of the power grid are acquired first. At present, various data of a power grid are generally directly acquired through a dispatching mechanism and a trading mechanism, for example, a D5000 platform is used for data acquisition, the D5000 platform is a power grid dispatching technology support system and is used for functions of real-time monitoring of power grid operation, online stability analysis, dispatching service management and the like, and the data acquisition of the power grid can be directly performed through the platform.
The reporting information of the power grid is information which needs to be reported when the power grid participates in the spot market. In general, the power market rules stipulate that the maximum output of the power grid needs to be declared when the power grid participates in the spot market, and the price information needs to be declared at the same time, namely the output of each gear has a corresponding price, and meanwhile, the maximum output declared by the power grid does not exceed the maximum declared power generation capacity, so that the declared output can be realized.
The operation boundary conditions of the power grid are generally obtained by a dispatching mechanism and a trading mechanism, and comprise power grid operation boundary conditions required by market clearing, such as system load prediction, bus load prediction, a tie line plan, a medium-long term plan, a delivery plan, a section quota, a fixed output plan and the like, so that a data basis is provided for subsequent market clearing optimization calculation and direct current flow data calculation.
S2: acquiring the operating state of each device in the power grid in the next day, determining the maximum declared power generation capacity of the power grid according to the operating state of each device in the power grid in the next day, and checking declaration information of the power grid according to the maximum declared power generation capacity; wherein, the operation state comprises maintenance, fault accompanying and stopping, maintenance accompanying and stopping, availability and island availability.
Specifically, the operating state of each device in the power grid in the next day is obtained first, and the following method is adopted in this implementation to determine: acquiring operation data of a power grid and the current operation state of each device in the power grid; and constructing a network topology according to the operation data, and determining the operation state of each device in the next day based on the logic relationship of the network topology and the current operation state of each device. The operation data comprises an equipment operation plan, an equipment retirement plan, an equipment power failure maintenance plan and a bus board receiving mode; the data are related to the running state and the future running state of each device in the power grid, the data are combined to build a network topology, the network topology is the live state of all devices in the power grid, such as the on-off state of a switch and a disconnecting link, the line operation, exit and charging state, the bus operation, exit, parallel operation, split operation and the like, the devices are connected to the power grid for power generation and stop, and the transformer operates, exits and no-load. And determining the running state of each device such as the device, the bus, the transformer and the like in the power grid on the next day based on the logical relation of the network topology by combining the current running state of each device in the power grid.
In addition, in the embodiment, the operation state is divided into maintenance, fault accompanying and stopping, maintenance accompanying and stopping, available state and island available state, so that multi-state division of the equipment state is realized. Compared with the current network model in which the states of equipment, lines, transformers and the like are only in an operation state and a shutdown state, the state description is single, accurate description of the states of the equipment cannot be met, the reason for shutdown of the equipment cannot be controlled, and the available state of the equipment cannot be determined in a future state; through multi-state division, the method can accurately determine the operation condition of the equipment, further accurately determine the output condition of each equipment, and simultaneously can build a more refined future state network model so as to obtain a more accurate market clearing result.
Further, determining the maximum declared power generation capacity of the power grid according to the operating state of each device in the power grid on the next day, and determining the operating state of each device in the power grid according to the operating state of each device on the next day; the maximum output of each device is determined according to the operation state of each device, the maximum output of all the devices is superposed to obtain the maximum declared power generation capacity of the power grid, specifically, the maximum output of the power grid at the moment can be known by knowing the state of each device according to the operation state of each device in the next day, if a planning unit comprises three devices A, B and C, and A is overhauled, B is failed, C is available, the maximum output of the power grid is determined by C, the maximum output exceeding C cannot be declared, and the maximum output of C is the maximum declared power generation capacity of the power grid.
It should be noted here that, different from the existing two states of operation and outage, the operation states include maintenance, fault accompanying and outage, maintenance accompanying and outage, availability and island availability, each state corresponds to different output conditions, and by finely dividing the operation states, the output condition and the maximum output of the power generation equipment can be more accurately obtained, and further, the accurate maximum declared power generation capacity of the power grid can be obtained.
Finally, checking reporting information of the power grid according to the maximum reported power generation capacity, checking and judging whether the maximum output reported by the power grid meets the actual state of each device in the power grid or not, and taking the result as effective reporting information if the check is passed, namely the reporting information meeting the following formula is taken as effective reporting information:
pm,t≤Pm,t
wherein p ism,tRepresenting the power generation capacity declared by the power plant m at the moment t; pm,tRepresenting the maximum declared power generation capacity of the plant m calculated in the above manner at time t.
When the maximum value of the power grid output in the declaration information is not greater than the maximum declaration power generation capacity, the declaration information passes the verification; otherwise, the declared information is not verified, the maximum value of the declared power grid output needs to be modified by the power grid according to the maximum declared power generation capacity, and the maximum declared power generation capacity cannot be exceeded.
The reporting information is that the power grid reports information to a scheduling mechanism, the scheduling mechanism is only responsible for acquiring and verifying the reporting information, and the reporting information passing the verification is used for optimizing and calculating the market clearing.
S3: and based on a future state network model of the power grid, performing day-ahead market ground state clearing by using the minimization of the power generation cost as an optimization target according to the declaration information passing the verification and the operation boundary conditions of the power grid, and obtaining a ground state clearing result.
The future state network model of the power grid can be directly obtained through the D5000 platform or can be established by self. In this embodiment, the following method is adopted to establish itself: the method includes the steps that a future state network model of the power grid is constructed according to operation data of the power grid and by combining operation states of all equipment in the next day, the constructed future state network model is constructed based on the multi-state operation states, the maximum difference between the constructed future state network model and a network model constructed in the existing mode is that states of all the equipment are divided more finely, and the future state network model accurately determines the future state of all the equipment so as to guarantee that clear results calculated based on the future state network model are more accurate and more suitable for actual conditions.
And further, according to the declaration information passing the verification and the operation boundary conditions of the power grid, taking the minimization of the power generation cost as an optimization target, and adopting a safety constraint equipment combination (SCUC) method and a Safety Constraint Economic Dispatching (SCED) method to carry out the market ground state clearing in the day and the day, so as to obtain a ground state clearing result.
The safety constraint equipment combination (SCUC) method and the Safety Constraint Economic Dispatching (SCED) method are mature market clearing optimization calculation methods in the field of power grids, and can be seen in Guangdong electric power market rules. By adopting the method, only a future state network model, a power grid operation boundary condition and declaration information passing verification are integrated, an objective function of optimization calculation is determined, and then a day-ahead market clearing model is constructed, namely the day-ahead market clearing model can be solved through the two methods, and then an equipment starting and stopping plan, an equipment power generation plan and a market clearing price of the power grid are obtained.
S4: and correcting the future state network model according to the ground state clearing result, obtaining the future state section quota of the power grid according to the ground state clearing result, and correcting the operation boundary condition of the power grid according to the future state section quota.
Specifically, the ground state clearing result generally comprises ground state tidal current data, a ground state power grid power generation plan and a ground state clearing price, wherein the ground state power generation plan gives the starting and stopping and running conditions of each device in the power grid in the future state, the ground state tidal current data gives the tidal current size of each device in the power grid in the future state, the running mode of the power grid in the future state can be determined by combining the two data information, and then the future state network model is corrected through the running mode.
Then, a future state section limit of the power grid needs to be obtained through a ground state clearing result, specifically, based on a corrected future state network model, equipment contained in each section of the power grid is obtained, ground state tide data of the power grid equipment contained in each section is overlapped by each section to obtain a section limit of each section, the section limits of all the sections are collected together to obtain the future state section limit of the power grid, the future state section limit of the power grid is a large collection containing the section limits of all the sections, and an element in the future state section limit is the section limit of each section. The existing fixed section limit mode is converted into a dynamic or intelligent section limit mode, the specific section limit is judged based on ground state tide data obtained by ground state clearing calculation, and compared with the existing mode of directly adopting the fixed section limit mode or inheriting the section limit of the previous day, the problem that the section limit is inaccurate due to the fact that the section limit changes greatly along with the operation mode of a power grid is solved.
And then, correcting the operation boundary conditions of the power grid according to the future state section limitation, specifically, since the previously determined operation boundary conditions are determined under the current section limitation condition and cannot accurately describe the operation boundary, the operation boundary conditions need to be corrected through the future state section limitation. Therefore, a future state bus load prediction and a future state tie plan of the power grid are obtained according to the future state section quota calculation, wherein the future state tie plan is future state tie flow data of the power grid, and specifically, alternating current flow calculation is carried out according to the section quota before the future state section quota replacement, because bus voltage and tie flow data cannot be obtained through direct current flow calculation, and alternating current flow can obtain the bus voltage and the tie flow, the latest future state bus load prediction and the future state tie plan are further obtained. And then replacing the section quota in the operation boundary condition with the future state section quota, replacing the bus load prediction in the operation boundary condition with the future state bus load prediction, and replacing the tie line plan in the operation boundary condition with the future state tie line plan to obtain the corrected operation boundary condition.
S5: and based on the corrected future state network model, performing the daily market clearing by using the minimization of the power generation cost as an optimization target according to the declaration information passing the verification and the corrected operation boundary condition to obtain a clearing result. Wherein, when the market is cleared in the day ahead, the market is cleared in the day ahead still by adopting a safety constraint equipment combination (SCUC) method and a Safety Constraint Economic Dispatching (SCED) method.
Referring to fig. 3, in a further embodiment of the present invention, there is provided a method for clearing a market before a date of power spot shipment, which includes at least a base-state clearing security check step and a clearing security check step in addition to all the contents of the above embodiment.
The ground state clearing safety checking method specifically comprises the following steps: obtaining a ground state sensitivity matrix of the power grid according to a future state network model of the power grid; when the ground state tide data in the ground state clearing result exceeds a preset ground state tide margin range, adjusting the output of each device in the power grid according to the ground state sensitivity matrix, updating the operation boundary conditions of the power grid according to the output of each device, clearing the ground state of the market at present again, and updating the current ground state clearing result; otherwise, outputting the basic state clearing result.
And the ground state sensitivity matrix comprises the sensitivity of each line tide of the power grid to the active power output of each node. Specifically, the ground state sensitivity matrix of the power grid is obtained in the following manner: obtaining the impedance of equipment on two sides of each node of the power grid and the impedance of each line in a corresponding time period according to a future state network model of the power grid, calculating the sensitivity of each line tide on the active power output of each node according to the impedance of the equipment on two sides of the nodes of the power grid and the impedance of the line, and combining to obtain a sensitivity matrix:
ski＝(xpi-xqi)/xk
wherein s iskiSensitivity, x, representing line power flow of the kth line to the active power output of the ith nodepiAnd xqiRespectively representing the impedance values, x, of the devices on either side of node ikRepresenting the impedance of line k.
Because each device can preset a power flow margin range based on the characteristics of the device, ground state clearing safety check refers to comparing calculated power flow data with the preset power flow margin ranges, the safety check refers to checking whether power flow results meet the requirements of sufficiency, such as whether lines, transformers and sections are overloaded, and then adjusting the output condition of the corresponding device according to the sensitivity. The transformer, the line, the section, the equipment and the like have own reasonable voltage and current margin ranges, the calculated tidal current is reasonable in the range, if the calculated tidal current exceeds the range, the out-of-limit condition of the equipment is not checked safely, the out-of-limit condition of the equipment needs to be adjusted, when the out-of-limit condition is adjusted, which generating equipment is adjusted according to the sensitivity, the section is not out-of-limit only by adjusting the amount of the generating equipment, and the safety check can be carried out.
And (3) determining the final ground state clearing result according to the ground state clearing result after the ground state clearing safety check is carried out, adjusting the output condition of equipment according to the ground state clearing result which does not pass the safety check, updating the operation boundary conditions of the power grid, carrying out market clearing optimization calculation before the date of the electric power spot by adopting a safety constraint unit combination method and a safety constraint economic dispatching method again to obtain a new ground state clearing result, and carrying out the ground state clearing safety check again until the ground state clearing safety check is carried out.
The clear-out safety check method specifically comprises the following steps: obtaining a sensitivity matrix of the power grid according to the corrected future state network model; when the power flow data in the clearing result exceeds a preset power flow margin range, adjusting the output of each device in the power grid according to the sensitivity matrix, updating the corrected operation boundary conditions according to the output of each device, performing the day-ahead market clearing again, and updating the current clearing result; otherwise, outputting a clear result.
Specifically, compared with the basic state clearing safety check step, the clearing safety check step is different in that a corrected future state network model is adopted to calculate a sensitivity matrix of the power grid, and the subsequent check is similar to the basic state clearing safety check.
Referring to fig. 4, in a further embodiment of the present invention, there is provided a method for clearing an electric spot market before date, which includes all the contents of any one of the above embodiments, and further includes at least an ac power flow safety check step: calculating alternating current power flow data of the power grid according to the corrected operation boundary conditions based on the corrected future state network model, adjusting the output of each device in the power grid when the alternating current power flow data exceeds the preset alternating current power flow margin range, updating the corrected future state network topology model and the corrected operation boundary conditions according to the output of each device, then performing day-ahead ground state market clearing according to verified declaration information and the corrected operation boundary conditions of the power grid based on the corrected future state network model and by using the power generation cost minimization as an optimization target, and updating a ground state clearing result; otherwise, based on the corrected future state network model, according to the declaration information passing the verification and the corrected operation boundary conditions, the day-ahead market clearing is carried out by taking the power generation cost minimization as an optimization target, and a clearing result is obtained.
In actual work, the inventor finds that the direct current power flow has linear expression and rapidity and is widely applied to the fields of power markets and economic dispatching, errors of direct current power flow results are closely related to running boundary conditions of a power grid, large errors of direct current power flow results directly cause inaccuracy of the running boundary conditions, and accuracy of the running boundary conditions is the key of rationality and accuracy of the future market clearing results.
Meanwhile, in the face of access of an alternating current-direct current power grid and a large amount of new energy, the power grid is being converted into a new form of alternating current-direct current interconnection, a new energy unit is usually accessed into the power grid through power electronic equipment, and the problem how to consider reactive power and active power coupling in the market is in urgent need of solving at present. Due to the new state of AC-DC interconnection and mass access of new energy, the active and reactive coupling in the power grid is increasingly tight, and the output fluctuation of DC feed-in and new energy provides higher requirements for the voltage and reactive safety of the power grid. However, the conventional dc power flow model cannot take reactive power and voltage into account, so that in this case, the error of the dc power flow result is relatively large, and the conventional dc power flow model has difficulty in ensuring the safety and economy of the market clearing result. Therefore, an active and reactive coupling clearing method is urgently needed to be researched in the spot market, the connection between the market clearing and the actual operation of the power grid is realized more safely and efficiently, the refinement level of the operation boundary of the power grid is improved, and the accuracy of future dynamic load flow calculation is improved.
Based on the above problems, an alternating current power flow safety check step is provided, and alternating current power flow data of the power grid is calculated according to the corrected operation boundary conditions based on a future state network topology model. The load flow calculation is the most basic calculation of the power grid, namely the load flow calculation is that the wiring mode, parameters and operating conditions of the power grid are known, the voltage of each bus, the current and power of each branch circuit and the loss of the power grid in steady-state operation of the power grid are calculated, and the basis can be provided for selecting a power supply scheme and electrical equipment of the power grid through the load flow calculation.
Then, safety check is carried out on each device in the power grid according to the alternating current power flow data, because each alternating current device can preset an alternating current power flow margin range based on the characteristics of the alternating current device, the safety check is to compare the calculated alternating current power flow data with the preset alternating current power flow margin ranges, check whether the alternating current power flow data meet the requirement of the abundance, and judge that the alternating current power flow data do not pass the safety check when the alternating current power flow data exceed the preset alternating current power flow margin ranges; and when the alternating current power flow data does not exceed the preset alternating current power flow margin range, judging that the safety check is passed.
When the safety check is not passed, the output of each device in the power grid needs to be adjusted, after the output of each device in the power grid is adjusted, the output parameter data of each device in the corrected future state network topology model and the output parameter data of each device in the corrected operation boundary conditions need to be correspondingly updated, the corrected future state network topology model and the corrected operation boundary conditions are updated, then based on the corrected future state network model, according to the declaration information passing the check and the corrected operation boundary conditions of the power grid, the future market ground state clearing is carried out by taking the electricity generation cost minimization as the optimization target, the ground state clearing result is updated, the subsequent steps are repeated, the iterative optimization of the alternating current trend and the future state section quota is carried out, and the reasonable future state section quota is obtained. When the safety check is passed, the current corrected operation boundary condition not only meets the direct current power flow result, but also meets the alternating current power flow result, based on the corrected future state network model, according to the declaration information passing the check and the corrected operation boundary condition, the day-ahead market clearing is carried out by taking the power generation cost minimization as an optimization target, the accuracy and the rationality of the day-ahead market clearing result of the current electric power commodity are improved, and the market trading behavior is guided reasonably.
Referring to fig. 5, in yet another embodiment of the present invention, a power spot day-ahead market clearing system is provided that may be used to implement the power spot day-ahead market clearing method provided in any of the above embodiments. Specifically, this electric power spot market before-date goes out clear system includes: the device comprises an information acquisition module, a declaration information verification module, a ground state clearing module, an operation boundary condition correction module and a clearing module.
The information acquisition module is used for acquiring declaration information and operation boundary conditions of the power grid. The reporting information checking module is used for acquiring the operation state of each equipment in the power grid in the next day, determining the maximum reporting power generation capacity of the power grid according to the operation state of each equipment in the power grid in the next day, and checking the reporting information of the power grid according to the maximum reporting power generation capacity. And the ground state clearing module is used for clearing the ground state of the market in the future based on a future state network model of the power grid according to the declaration information passing the verification and the operation boundary conditions of the power grid by using the minimization of the power generation cost as an optimization target to obtain a ground state clearing result. And the operation boundary condition correction module is used for correcting the future state network model according to the ground state clearing result, obtaining the future state section quota of the power grid according to the ground state clearing result and correcting the operation boundary condition of the power grid according to the future state section quota. And the clearing module is used for clearing the market in the future based on the corrected future state network model according to the declaration information passing the verification and the corrected operation boundary conditions by using the electricity generation cost minimization as an optimization target to obtain a clearing result.
In yet another embodiment of the present invention, a terminal device is provided that includes a processor and a memory for storing a computer program comprising program instructions, the processor being configured to execute the program instructions stored by the computer storage medium. The Processor may be a Central Processing Unit (CPU), or may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable gate array (FPGA) or other Programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which is a computing core and a control core of the terminal, and is adapted to implement one or more instructions, and is specifically adapted to load and execute one or more instructions to implement a corresponding method flow or a corresponding function; the processor of the embodiment of the invention can be used for the operation of the electric power spot day-ahead market clearing method, and comprises the following steps: acquiring declaration information and operation boundary conditions of a power grid; determining the maximum declared power generation capacity of the power grid according to the operating state of each device in the power grid in the next day, and checking the declared information of the power grid according to the maximum declared power generation capacity; wherein the operation state comprises maintenance, fault accompanying and stopping, maintenance accompanying and stopping, availability and island availability; based on a future state network model of the power grid, performing day-ahead market ground state clearing by using a power generation cost minimization optimization target according to declaration information passing verification and operation boundary conditions of the power grid to obtain a ground state clearing result; correcting a future state network model according to the ground state clearing result, obtaining a future state section limit of the power grid according to the ground state clearing result, and correcting the operation boundary condition of the power grid according to the future state section limit; and based on the corrected future state network model, performing the daily market clearing by using the minimization of the power generation cost as an optimization target according to the declaration information passing the verification and the corrected operation boundary condition to obtain a clearing result.
In still another embodiment, the present invention also provides a computer-readable storage medium (Memory) which is a Memory device in a terminal device and stores programs and data. It is understood that the computer readable storage medium herein may include a built-in storage medium in the terminal device, and may also include an extended storage medium supported by the terminal device. The computer-readable storage medium provides a storage space storing an operating system of the terminal. Also, one or more instructions, which may be one or more computer programs (including program code), are stored in the memory space and are adapted to be loaded and executed by the processor. It should be noted that the computer-readable storage medium may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory.
One or more instructions stored in the computer-readable storage medium may be loaded and executed by the processor to implement the corresponding steps of the method for market withdrawal on electric power spot days in the above embodiments; one or more instructions in the computer-readable storage medium are loaded by the processor and perform the steps of: acquiring declaration information and operation boundary conditions of a power grid; determining the maximum declared power generation capacity of the power grid according to the operating state of each device in the power grid in the next day, and checking the declared information of the power grid according to the maximum declared power generation capacity; based on a future state network model of the power grid, performing day-ahead market ground state clearing by using a power generation cost minimization optimization target according to declaration information passing verification and operation boundary conditions of the power grid to obtain a ground state clearing result; correcting a future state network model according to the ground state clearing result, obtaining a future state section limit of the power grid according to the ground state clearing result, and correcting the operation boundary condition of the power grid according to the future state section limit; and based on the corrected future state network model, performing the daily market clearing by using the minimization of the power generation cost as an optimization target according to the declaration information passing the verification and the corrected operation boundary condition to obtain a clearing result.
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. A method for clearing the market before the current electric power goods is characterized by comprising the following steps:
acquiring declaration information and operation boundary conditions of a power grid;
acquiring the operating state of each device in the power grid in the next day, determining the maximum declared power generation capacity of the power grid according to the operating state of each device in the power grid in the next day, and checking declaration information of the power grid according to the maximum declared power generation capacity;
based on a future state network model of the power grid, performing day-ahead market ground state clearing by using a power generation cost minimization optimization target according to declaration information passing verification and operation boundary conditions of the power grid to obtain a ground state clearing result;
correcting a future state network model according to the ground state clearing result, obtaining a future state section limit of the power grid according to the ground state clearing result, and correcting the operation boundary condition of the power grid according to the future state section limit;
and based on the corrected future state network model, performing the daily market clearing by using the minimization of the power generation cost as an optimization target according to the declaration information passing the verification and the corrected operation boundary condition to obtain a clearing result.
2. The electric power spot day-ahead market clearing method according to claim 1, wherein the operation state of each device in the grid on the next day is acquired as follows:
acquiring operation data of a power grid and the current operation state of each device in the power grid; the operation data comprises an equipment operation plan, an equipment retirement plan, an equipment power failure maintenance plan and a bus board receiving mode;
constructing a network topology according to the operation data, and determining the operation state of each device in the next day based on the logic relationship of the network topology and the current operation state of each device; wherein the operation state comprises maintenance, fault accompanying, maintenance accompanying, available and island available.
3. The method for market clearing of electric power spot shipment day ahead according to claim 1, wherein the specific method for determining the maximum declared power generation capacity of the power grid according to the operation state of each device in the power grid in the following day is as follows:
determining the operation state of each device in the power grid according to the operation state of each device in the next day; determining the maximum output of each device according to the running state of each device, and superposing the maximum outputs of all the devices to obtain the maximum declared power generation capacity of the power grid; when the maximum value of the power generation capacity of the power grid in the declaration information is not greater than the maximum declaration power generation capacity, the declaration information passes the verification; otherwise, the declaration information is not checked to be passed.
4. The power spot day-ahead market clearing method of claim 1, further comprising a ground state clearing security check step of:
obtaining a ground state sensitivity matrix of the power grid according to a future state network model of the power grid;
when the ground state tide data in the ground state clearing result exceeds a preset ground state tide margin range, adjusting the output of each device in the power grid according to the ground state sensitivity matrix, updating the operation boundary conditions of the power grid according to the output of each device, clearing the ground state of the market at present again, and updating the current ground state clearing result; otherwise, outputting a ground state clearing result;
further comprises a clear safety check step:
obtaining a sensitivity matrix of the power grid according to the corrected future state network model;
when the power flow data in the clearing result exceeds a preset power flow margin range, adjusting the output of each device in the power grid according to the sensitivity matrix, updating the corrected operation boundary conditions according to the output of each device, performing the day-ahead market clearing again, and updating the current clearing result; otherwise, outputting a clear result.
5. The electric power spot day-ahead market clearing method according to claim 1, wherein the specific method for obtaining the future state section quota of the power grid according to the ground state clearing result is as follows:
obtaining ground state power flow data of each device in the power grid according to the ground state clearing result; and acquiring equipment contained in each section of the power grid based on the corrected future state network model, superposing ground state power flow data of the equipment contained in each section by each section to obtain the section quota of each section, and collecting the section quotas of all the sections together to obtain the future state section quota of the power grid.
6. The method for market removal of electric power spot-shipment day ahead according to claim 1, wherein the specific method for correcting the operation boundary conditions of the power grid according to the future state section quota is as follows:
based on the corrected future state network model, calculating according to the future state section quota to obtain the future state bus load prediction and the future state tie line plan of the power grid;
and replacing the section quota in the operation boundary condition with the future state section quota, replacing the bus load prediction in the operation boundary condition with the future state bus load prediction, and replacing the tie line plan in the operation boundary condition with the future state tie line plan to obtain the corrected operation boundary condition.
7. The electric power spot day-ahead market clearing method as claimed in claim 1, further comprising an ac power flow safety check step of:
calculating alternating current power flow data of the power grid according to the corrected operation boundary conditions based on the corrected future state network model, adjusting the output of each device in the power grid when the alternating current power flow data exceeds the preset alternating current power flow margin range, updating the corrected future state network topology model, the future state section quota and the corrected operation boundary conditions according to the output of each device, then performing the daily market ground state clearing according to the verified declaration information and the corrected operation boundary conditions of the power grid based on the corrected future state network model and by using the power generation cost minimization as the optimization target, and updating the ground state clearing result;
otherwise, based on the corrected future state network model, according to the declaration information passing the verification and the corrected operation boundary conditions, the day-ahead market clearing is carried out by taking the power generation cost minimization as an optimization target, and a clearing result is obtained.
8. An electric spot day-ahead market clearing system, comprising:
the information acquisition module is used for acquiring declaration information and operation boundary conditions of the power grid;
the reporting information checking module is used for acquiring the operating state of each equipment in the power grid in the next day, determining the maximum reporting power generation capacity of the power grid according to the operating state of each equipment in the power grid in the next day, and checking the reporting information of the power grid according to the maximum reporting power generation capacity;
the ground state clearing module is used for clearing the ground state of the market in the day ahead according to the declaration information passing the verification and the operation boundary conditions of the power grid based on a future state network model of the power grid by using the minimization of the power generation cost as an optimization target to obtain a ground state clearing result;
the operation boundary condition correction module is used for correcting a future state network model according to the ground state clearing result, obtaining a future state section limit of the power grid according to the ground state clearing result and correcting the operation boundary condition of the power grid according to the future state section limit; and
and the clearing module is used for clearing the market in the future based on the corrected future state network model according to the declaration information passing the verification and the corrected operation boundary conditions by using the electricity generation cost minimization as an optimization target to obtain a clearing result.
9. A terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the power spot market clearing method according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method for market-before-date export of electric power according to any one of claims 1 to 7.
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| CN112907286A (en) * | 2021-02-20 | 2021-06-04 | 中国电力科学研究院有限公司 | Water-electricity-price three-dimensional linked market clearing method, system, equipment and storage medium |
| CN112907078A (en) * | 2021-02-20 | 2021-06-04 | 中国电力科学研究院有限公司 | Market clearing method, system, equipment and readable storage medium for water-electricity coupling |
| CN112950296A (en) * | 2021-05-12 | 2021-06-11 | 浙江万里扬能源科技股份有限公司 | Data processing method for clearing calculation network model in power market |
| CN112950296B (en) * | 2021-05-12 | 2021-07-30 | 浙江万里扬能源科技股份有限公司 | Data processing method for clearing calculation network model in power market |
| CN113568988A (en) * | 2021-07-29 | 2021-10-29 | 云南电网有限责任公司 | Boundary data management method, device and system for electric power spot market clearing |
| CN113568988B (en) * | 2021-07-29 | 2023-06-27 | 云南电网有限责任公司 | Boundary data management method, device and system for electric power spot market clearing |
| CN114285092A (en) * | 2021-12-24 | 2022-04-05 | 中国电力科学研究院有限公司 | Regional power grid security check method, system, equipment and storage medium |
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