CN116862559A - Method, system and equipment for participating in flexible market transaction when hydropower is not quoting - Google Patents
Method, system and equipment for participating in flexible market transaction when hydropower is not quoting Download PDFInfo
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Abstract
The invention discloses a method, a system and equipment for participating in flexible market transaction when hydropower is not offered, which relate to the technical field of electric power, and the method comprises the following steps: receiving grid basic data, wherein the grid basic data comprises: unit data, load data, new energy data and payload prediction error data; calculating and obtaining the system flexibility requirement according to the net load prediction error data; inputting the system flexibility requirement into a pre-established main energy and flexibility climbing market joint clearing model without considering the participation of water and electricity to obtain the system flexibility climbing shortage; under the consideration of the participation of water and electricity, the system flexible climbing shortage is input into a pre-established main energy and flexible climbing market joint clearing model, and the water and electricity benefits are obtained.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a method, a system and equipment for participating in flexible market transaction when hydropower is not offered.
Background
The new energy grid-connected proportion is continuously increased, and higher requirements are put on flexible adjustment capability of the power system. Among the existing flexible resources, the hydropower resources have the advantages of excellent regulation performance and low regulation cost, and are the best choice for bearing flexible regulation tasks. In the current flexible climbing product transaction, the flexible climbing capacity is priced according to the opportunity cost, and the study on a flexible climbing market transaction mechanism when hydropower does not participate in the power spot market quotation and is difficult to calculate the opportunity cost is lacking. Therefore, a combined clear model of main energy and a flexible climbing market under the condition of no quotation of water and electricity is necessary to be established, and a reasonable water and electricity income mechanism is formulated, so that water and electricity are stimulated to participate in flexible resource scheduling, and the flexibility adequacy in the system is ensured.
Disclosure of Invention
In order to solve the defects in the background art, the invention aims to provide a method, a system and equipment for participating in flexible market trading when hydropower is not offered.
The aim of the invention can be achieved by the following technical scheme: a method for participating in flexible market transaction when hydropower is not offered, the method comprises the following steps:
receiving grid basic data, wherein the grid basic data comprises: unit data, load data, new energy data and payload prediction error data;
calculating and obtaining the system flexibility requirement according to the net load prediction error data;
inputting the system flexibility requirement into a pre-established main energy and flexibility climbing market joint clearing model without considering the participation of water and electricity to obtain the system flexibility climbing shortage;
under the consideration of the participation of water and electricity, the system flexible climbing shortage is input into a pre-established main energy and flexible climbing market joint clearing model, and the water and electricity benefits are obtained.
Preferably, the net load is the total load minus the residual load after new energy power generation, and the net load prediction error consists of a load prediction error and a new energy prediction error.
Preferably, the system flexibility requirements include predicted payload fluctuations and uncertainty requirements.
Preferably, the predicted payload fluctuation is the change amount of the payload of the next period of the system from the current period, and the uncertainty requirement is: the amount of demand that is additionally generated to meet the deviations within certain confidence intervals of the system payload predictions.
Preferably, the combined primary energy and flexible climbing market model is as follows:
minf＝C G +C F +C I
wherein: c (C) G Is the total cost of the thermal power generating unit; c (C) F Insufficient cost for system flexibility; c (C) I A punishment item is operated for the hydroelectric generating set, and:
wherein: a, a i 、b i Respectively quoting curve coefficients for the thermal power unit i;the system is characterized in that the climbing and landslide shortages of the thermal power generating unit i at the time t are respectively, namely the system flexibility shortages; />For the state variable of the hydroelectric generating set k at the moment t, 1 represents startup and 0 represents shutdown; pi cap Is the upper limit of the system price; mu is the punishment coefficient of the operation of the hydroelectric generating set and is set to 10 7 Thereby ensuring the short operation time of the hydroelectric generating set; n (N) T The number of time segments for simulation; n (N) G Is the number of generators.
Preferably, the combined primary energy and flexible uphill market model is not availableConsidering the first two items of objective function C when considering the participation of water and electricity G And C F The method comprises the steps of carrying out a first treatment on the surface of the Considering the first and third terms C of the objective function when considering the participation of water and electricity G And C I 。
Preferably, the constraint conditions of the combined dominant energy and flexible climbing market model are as follows:
a. electric quantity balance constraint:
wherein:for the output level of the thermal power unit i at time t,/->For the output level of the hydroelectric generating set k at time t,predicted payload for time t;
b. thermal power generating unit output constraint:
wherein: p (P) G,i,max 、P G,i,min Respectively representing the upper and lower limits of the output of the thermal power unit i;
c. climbing constraint of thermal power generating unit:
wherein: r is R UG,i 、R DG,i Respectively representing the upward climbing speed and the downward landslide speed of the thermal power unit i;
d. the output constraint of the hydroelectric generating set:
wherein: p (P) H,k,max 、P H,k,min The upper and lower limits of the output of the hydroelectric generating set k are respectively set;
e. climbing constraint of hydroelectric generating set:
wherein: r is R UH,k 、R DH,k Respectively representing the upward climbing speed and the downward landslide speed of the hydroelectric generating set k;
f. flexibility balances constraints:
wherein:upward and downward flexibility reserved for the thermal power generating unit i at the moment t respectively; /> Upward and downward flexibility reserved for the hydroelectric generating set k at the moment t respectively; FUS (functional unit) t 、FDS t The upward and downward flexibility requirements of the system at the time t are respectively as follows:
wherein: FUU (fluid handling unit) t+1 、FDS t+1 The uncertainty of the upward and downward of the system at the time t+1 is respectively;
g. thermal power generating unit flexibility output constraint:
h. flexible output constraint of hydroelectric generating set:
preferably, the hydropower benefits include a main energy market benefit and a flexible climbing market benefit, wherein the main energy market benefit is a difference in total costs of thermal power when the hydropower participation is not considered, respectively; the flexible climbing market benefit is the product of the system flexible climbing deficiency and the upper limit of the system price.
Preferably, a system for participating in flexible market trading when hydropower is not bidding, comprising:
and a data acquisition module: for receiving grid base data, wherein the grid base data comprises: unit data, load data, new energy data and payload prediction error data;
the calculation module: the system flexibility requirement is calculated according to the net load prediction error data;
and the calculation module of the hydroelectric participation model is not considered: the system is used for inputting the system flexibility requirement into a pre-established main energy and flexibility climbing market joint clear model without considering the participation of water and electricity to obtain the system flexibility climbing shortage;
consider a hydropower participation model calculation module: the system is used for inputting the flexible climbing shortage of the system into a pre-established main energy and flexible climbing market joint clearing model under the consideration of the participation of water and electricity, so that the water and electricity benefits are obtained.
Preferably, an apparatus comprises:
one or more processors;
a memory for storing one or more programs;
the flexible market transaction method is engaged when one or more of the programs are executed by one or more of the processors, such that the one or more of the processors implement a hydropower non-quotation as described above.
The invention has the beneficial effects that:
aiming at the flexible climbing demand generated by uncertainty under high-proportion new energy access and considering the special situation that hydropower does not participate in quotation, the invention provides a combined clear model of main energy and flexible climbing markets, which is divided into solving without considering hydropower and considering hydropower, reasonably evaluating the contribution of hydropower to provide flexible climbing capacity and providing a hydropower income settlement mode. The invention provides a certain reference for the water and electricity resources to participate in the flexible climbing product transaction, is beneficial to improving the enthusiasm of the water and electricity to participate in the flexible climbing market, and improves the safety and the economical efficiency of the system operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort;
FIG. 1 is a schematic flow chart of the method of the present invention;
FIG. 2 is a graph of the output result of a thermal power unit without considering the participation of hydropower;
fig. 3 is a graph of the results of thermal power and hydro-electric power output considering the participation of hydro-electric power.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, a method for participating in flexible market transaction when hydropower is not offered, the method comprises the following steps:
receiving grid basic data, wherein the grid basic data comprises: unit data, load data, new energy data and payload prediction error data;
the net load is the total load minus the residual load after new energy power generation, and the net load prediction error consists of a load prediction error and a new energy prediction error.
Calculating and obtaining the system flexibility requirement according to the net load prediction error data;
the system flexibility requirements include predicted payload fluctuations and uncertainty requirements.
The predicted payload fluctuation is the change quantity of the payload of the next period of the system compared with the current period, and the uncertainty requirement is as follows: the amount of demand that is additionally generated to meet the deviations within certain confidence intervals of the system payload predictions.
Inputting the system flexibility requirement into a pre-established main energy and flexibility climbing market joint clearing model without considering the participation of water and electricity to obtain the system flexibility climbing shortage;
under the consideration of the participation of water and electricity, the system flexible climbing shortage is input into a pre-established main energy and flexible climbing market joint clearing model, and the water and electricity benefits are obtained. Hydropower benefits include primary energy market benefits and flexible uphill market benefits. The main energy market gain is the difference of the total cost of the thermal power when the participation of the water and electricity is not considered and considered respectively (the participation of the water and electricity is considered to reduce the clear amount of the thermal power and the total cost of the thermal power, so that the partial cost difference is taken as the income of the water and electricity in the main energy market); the market gain of flexible climbing is the product of the system flexibility climbing deficiency and the upper limit of the system price (the participation of the hydropower is considered to ensure that the system avoids the economic loss caused by the insufficient flexibility, and therefore the partial system flexibility deficiency cost is compensated to the hydropower).
The combined clear model of the main energy and flexible climbing market is as follows:
minf＝C G +C F +C I
wherein: c (C) G Is the total cost of the thermal power generating unit; c (C) F Insufficient cost for system flexibility; c (C) I A punishment item is operated for the hydroelectric generating set, and:
wherein: a, a i 、b i Respectively quoting curve coefficients for the thermal power unit i;the system is characterized in that the climbing and landslide shortages of the thermal power generating unit i at the time t are respectively, namely the system flexibility shortages; />For the state variable of the hydroelectric generating set k at the moment t, 1 represents startup and 0 represents shutdown; pi cap Is the upper limit of the system price; mu is the punishment coefficient of the operation of the hydroelectric generating set and is set to 10 7 Thereby ensuring the short operation time of the hydroelectric generating set; n (N) T The number of time segments for simulation; n (N) G Is the number of generators.
The primary energy and flexibility climbing market combined clearing model considers the first two items C of the objective function when not considering the participation of water and electricity G And C F The method comprises the steps of carrying out a first treatment on the surface of the Considering the first and third terms C of the objective function when considering the participation of water and electricity G And C I 。
The constraint conditions of the combined clear model of the main energy and flexible climbing market are as follows:
a. electric quantity balance constraint:
wherein:for the output level of the thermal power unit i at time t,/->For the output level of the hydroelectric generating set k at time t,predicted payload for time t;
b. thermal power generating unit output constraint:
wherein: p (P) G,i,max 、P G,i,min Respectively representing the upper and lower limits of the output of the thermal power unit i;
c. climbing constraint of thermal power generating unit:
wherein: r is R UG,i 、R DG,i Respectively representing the upward climbing speed and the downward landslide speed of the thermal power unit i;
d. the output constraint of the hydroelectric generating set:
wherein: p (P) H,k,max 、P H,k,min The upper and lower limits of the output of the hydroelectric generating set k are respectively set;
e. climbing constraint of hydroelectric generating set:
wherein: r is R UH,k 、R DH,k Respectively representing the upward climbing speed and the downward landslide speed of the hydroelectric generating set k;
f. flexibility balances constraints:
in the middle of：Upward and downward flexibility reserved for the thermal power generating unit i at the moment t respectively; /> Upward and downward flexibility reserved for the hydroelectric generating set k at the moment t respectively; FUS (functional unit) t 、FDS t The upward and downward flexibility requirements of the system at the time t are respectively as follows:
wherein: FUU (fluid handling unit) t+1 、FDS t+1 The uncertainty of the upward and downward of the system at the time t+1 is respectively;
g. thermal power generating unit flexibility output constraint:
h. flexible output constraint of hydroelectric generating set:
a system for participating in flexible market trading when hydropower is not bidding, comprising:
and a data acquisition module: for receiving grid base data, wherein the grid base data comprises: unit data, load data, new energy data and payload prediction error data;
the calculation module: the system flexibility requirement is calculated according to the net load prediction error data;
and the calculation module of the hydroelectric participation model is not considered: the system is used for inputting the system flexibility requirement into a pre-established main energy and flexibility climbing market joint clear model without considering the participation of water and electricity to obtain the system flexibility climbing shortage;
consider a hydropower participation model calculation module: the system is used for inputting the flexible climbing shortage of the system into a pre-established main energy and flexible climbing market joint clearing model under the consideration of the participation of water and electricity, so that the water and electricity benefits are obtained.
Based on the same inventive concept, the present invention also provides a computer apparatus comprising: one or more processors, and memory for storing one or more computer programs; the program includes program instructions and the processor is configured to execute the program instructions stored in the memory. The processor may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application SpecificIntegrated Circuit, ASIC), field-Programmable gate arrays (FPGAs) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., which are the computational core and control core of the terminal for implementing one or more instructions, in particular for loading and executing one or more instructions within a computer storage medium to implement the methods described above.
It should be further noted that, based on the same inventive concept, the present invention also provides a computer storage medium having a computer program stored thereon, which when executed by a processor performs the above method. The storage media may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electrical, magnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The verification is performed using specific examples below.
The system comprises 3 thermal power generating units and 1 hydroelectric generating unit, and one hour is taken as a dispatching period. The unit data are shown in table 1 (since the hydroelectric unit does not participate in the quotation, the quotation is considered to be 0); the payload data is shown in table 2.
Table 1 set data
Table 2 payload data
The main energy and flexibility climbing market joint clear model established by the invention is solved without considering the participation of water and electricity, the thermal power output result is shown in figure 2, the final 5-minute thermal power supply landslide amount is shown in table 3, the total cost of the thermal power unit is shown in table 4, and the system flexibility deficiency cost is shown in table 5.
The model is solved under the consideration of the participation of water and electricity, and the result of the power of the water and electricity is shown in figure 3. The water and electricity benefits are shown in Table 4. It can be seen that the hydropower exerts good regulation performance, overcomes the shortage of system flexibility, and the hydropower income is mostly from the flexible climbing market.
TABLE 3 last 5 minutes thermal power generating unit providing landslide condition
TABLE 4 Total cost of thermal power generating units
Table 5 System flexibility inadequate cost
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing has shown and described the basic principles, principal features, and advantages of the present disclosure. It will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, which have been described in the foregoing and description merely illustrates the principles of the disclosure, and that various changes and modifications may be made therein without departing from the spirit and scope of the disclosure, which is defined in the appended claims.
Claims (10)
1. A method for participating in flexible market trading when hydropower is not offered, the method comprising the steps of:
receiving grid basic data, wherein the grid basic data comprises: unit data, load data, new energy data and payload prediction error data;
calculating and obtaining the system flexibility requirement according to the net load prediction error data;
inputting the system flexibility requirement into a pre-established main energy and flexibility climbing market joint clearing model without considering the participation of water and electricity to obtain the system flexibility climbing shortage;
under the consideration of the participation of water and electricity, the system flexible climbing shortage is input into a pre-established main energy and flexible climbing market joint clearing model, and the water and electricity benefits are obtained.
2. The method for participating in flexible market trading when hydropower is not offered according to claim 1, wherein the net load is the total load minus the residual load after new energy power generation, and the net load prediction error consists of a load prediction error and a new energy prediction error.
3. A method of engaging in flexible market trading when hydropower is not bidding according to claim 1, wherein the system flexibility requirements include predicted payload fluctuations and uncertainty requirements.
4. A method of engaging in flexible market trading when hydropower is not bidding according to claim 3, wherein the predicted payload fluctuation is the change in payload for the next period of the system over the current period, and the uncertainty requirement is: the amount of demand that is additionally generated to meet the deviations within certain confidence intervals of the system payload predictions.
5. The method for participating in flexible market trading when hydropower is not offered according to claim 1, wherein the combined primary energy and flexible climbing market model is as follows:
minf＝C G +C F +C I
wherein: c (C) G Is the total cost of the thermal power generating unit; c (C) F Insufficient cost for system flexibility; c (C) I A punishment item is operated for the hydroelectric generating set, and:
wherein: a, a i 、b i Respectively quoting curve coefficients for the thermal power unit i;respectively, the climbing and landslide shortages of the thermal power generating unit i at the time t, namely the system flexibility is lackingA forehead; />For the state variable of the hydroelectric generating set k at the moment t, 1 represents startup and 0 represents shutdown; pi cap Is the upper limit of the system price; mu is the punishment coefficient of the operation of the hydroelectric generating set and is set to 10 7 Thereby ensuring the short operation time of the hydroelectric generating set; n (N) T The number of time segments for simulation; n (N) G Is the number of generators.
6. The method for trading the flexible market when water and electricity are not offered according to claim 5, wherein the combined primary energy and flexible climbing market model considers the first two items C of the objective function when water and electricity participation is not considered G And C F The method comprises the steps of carrying out a first treatment on the surface of the Considering the first and third terms C of the objective function when considering the participation of water and electricity G And C I 。
7. The method for participating in flexible market trading when water and electricity are not offered according to claim 6, wherein the constraint conditions of the combined primary energy and flexible climbing market model are as follows:
a. electric quantity balance constraint:
wherein:for the output level of the thermal power unit i at time t,/->For the output level of the hydroelectric generating set k at time t, < >>Predicted payload for time t;
b. thermal power generating unit output constraint:
wherein: p (P) G,i,max 、P G,i,min Respectively representing the upper and lower limits of the output of the thermal power unit i;
c. climbing constraint of thermal power generating unit:
wherein: r is R UG,i 、R DG,i Respectively representing the upward climbing speed and the downward landslide speed of the thermal power unit i;
d. the output constraint of the hydroelectric generating set:
wherein: p (P) H,k,max 、P H,k,min The upper and lower limits of the output of the hydroelectric generating set k are respectively set;
e. climbing constraint of hydroelectric generating set:
wherein: r is R UH,k 、R DH,k Respectively representing the upward climbing speed and the downward landslide speed of the hydroelectric generating set k;
f. flexibility balances constraints:
wherein:upward and downward flexibility reserved for the thermal power generating unit i at the moment t respectively; /> Upward and downward flexibility reserved for the hydroelectric generating set k at the moment t respectively; FUS (functional unit) t 、FDS t The upward and downward flexibility requirements of the system at the time t are respectively as follows:
wherein: FUU (fluid handling unit) t+1 、FDS t+1 The uncertainty of the upward and downward of the system at the time t+1 is respectively;
g. thermal power generating unit flexibility output constraint:
h. flexible output constraint of hydroelectric generating set:
8. a method of engaging in a flexible market exchange when hydropower is not quoting according to claim 1, wherein the hydropower benefits comprise a main energy market benefit and a flexible uphill market benefit, wherein the main energy market benefit is the difference in total costs of thermal power when the hydropower engagement is not considered, respectively; the flexible climbing market benefit is the product of the system flexible climbing deficiency and the upper limit of the system price.
9. A system for participating in flexible market trading when hydropower is not bidding, comprising:
and a data acquisition module: for receiving grid base data, wherein the grid base data comprises: unit data, load data, new energy data and payload prediction error data;
the calculation module: the system flexibility requirement is calculated according to the net load prediction error data;
and the calculation module of the hydroelectric participation model is not considered: the system is used for inputting the system flexibility requirement into a pre-established main energy and flexibility climbing market joint clear model without considering the participation of water and electricity to obtain the system flexibility climbing shortage;
consider a hydropower participation model calculation module: the system is used for inputting the flexible climbing shortage of the system into a pre-established main energy and flexible climbing market joint clearing model under the consideration of the participation of water and electricity, so that the water and electricity benefits are obtained.
10. An apparatus, comprising:
one or more processors;
a memory for storing one or more programs;
a method of engaging in flexible market trading when one or more of said programs are executed by one or more of said processors, such that one or more of said processors implements a hydropower non-quotation as claimed in any one of claims 1 to 8.
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| CN117994037A (en) * | 2024-03-05 | 2024-05-07 | 东北电力大学 | Multi-energy coupling system configuration method and system considering flexibility quota transaction mechanism |
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2023
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117994037A (en) * | 2024-03-05 | 2024-05-07 | 东北电力大学 | Multi-energy coupling system configuration method and system considering flexibility quota transaction mechanism |
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