Control method and device for coupling power generation system and medium

Abstract

The invention discloses a control method and device for a coupling power generation system and a medium, and the method comprises the steps: determining a load deviation based on the current total power generation power of a target coupling power generation system and the target total power generation power; the target coupling power generation system comprises a new energy power generation resource and a non-new energy power generation resource; at least based on the load deviation, the new energy power generation power up-regulation amount, the non-new energy power generation power up-regulation amount and the non-new energy power generation power down-regulation amount, determining any output parameter of an output replacement parameter of the power generation resource, an output increase parameter of the power generation resource and an output decrease parameter of the power generation resource, obtaining a target control instruction; and controlling the new energy power generation resources and the non-new energy power generation resources based on the target control instruction. According to the invention, new energy power generation resources and non-new energy power generation resources in the target coupling system can be reasonably and accurately controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of power regulation and control, and in particular to a control method, device and medium for a coupled power generation system. Background Art

[0002] New energy (wind power, photovoltaic) has the characteristics of randomness and volatility, and its output is affected by actual meteorological conditions, while the output of thermal power generation and energy storage is stable and controllable. If new energy is coupled with thermal power or energy storage and bundled as a whole, the stable and controllable advantages of thermal power and energy storage can be fully utilized to locally smooth out the fluctuations of new energy, reduce the abandonment of wind and solar power, promote the transmission and consumption of new energy, and accelerate the transformation and upgrading of the power system.

[0003] Therefore, there is an urgent need for a control method for a coupled power generation system to reasonably and accurately control the power generation output of the renewable energy power generation resources and the non-renewable energy power generation resources in the coupled power generation system. Summary of the invention

[0004] In view of this, the present invention provides a control method, device and medium for a coupled power generation system, the main purpose of which is to solve the current problem of being unable to reasonably control the power generation output of new energy power generation resources and non-new energy power generation resources in a coupled power generation system.

[0005] In order to solve the above problems, the present application provides a control method for a coupled power generation system, comprising:

[0006] Determining a load deviation based on a current total power generation power and a target total power generation power of a target coupled power generation system; the target coupled power generation system includes: new energy power generation resources and non-new energy power generation resources;

[0007] Determine any one of an output replacement parameter of a power generation resource, an output increase parameter of a power generation resource, and an output reduction parameter of a power generation resource based at least on the load deviation, the adjustable amount of the renewable energy power generation, the adjustable amount of the non-renewable energy power generation, and the adjustable amount of the non-renewable energy power generation to obtain a target control instruction;

[0008] The new energy power generation resources and non-new energy power generation resources are controlled based on the target control instruction.

[0009] In order to solve the above problems, the present application provides a control device for a coupled power generation system, comprising:

[0010] A deviation determination module, configured to determine a load deviation based on a current total power generation power and a target total power generation power of a target coupled power generation system; the target coupled power generation system includes: new energy power generation resources and non-new energy power generation resources;

[0011] a parameter determination module, configured to determine any one of an output replacement parameter of a power generation resource, an output increase parameter of a power generation resource, and an output reduction parameter of a power generation resource based at least on the load deviation, the adjustable amount of the renewable energy power generation, the adjustable amount of the non-renewable energy power generation, and the adjustable amount of the non-renewable energy power generation, so as to obtain a target control instruction;

[0012] A control module is used to control the renewable energy power generation resources and non-renewable energy power generation resources based on the target control instruction.

[0013] To solve the above problems, the present application provides a storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the steps of any of the above control methods for a coupled power generation system are implemented.

[0014] A control method, device and medium for a coupled power generation system in the present application can reasonably and accurately determine output replacement parameters, output increase parameters or output reduction parameters by determining load deviation values, adjustable upward amounts of renewable energy power generation, adjustable upward amounts of non-renewable energy power generation and adjustable downward amounts of non-renewable energy power generation, thereby being able to accurately control renewable energy power generation resources and non-renewable energy power generation resources in a target coupled system according to the output replacement parameters, output increase parameters or output reduction parameters.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0017] Figure 1 This is a flow chart of a control method for a coupled power generation system according to an embodiment of the present application;

[0018] Figure 2 Schematic diagram of several configurations of the target coupled power generation system in the embodiment of the present application;

[0019] Figure 3 A flowchart for determining target control instructions in a scenario of this application;

[0020] Figure 4A flowchart for determining a target control instruction in another scenario of the present application;

[0021] Figure 5 This is a structural block diagram of a control device for a coupled power generation system according to another embodiment of the present application. DETAILED DESCRIPTION

[0022] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0023] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0025] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0026] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art will be able to readily implement many other equivalent forms of the present application.

[0027] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0028] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0029] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0030] The present application embodiment provides a control method for a coupled power generation system, such as Figure 1 As shown, the following steps are included:

[0031] Step S101, determining a load deviation based on a current total power generation power and a target total power generation power of a target coupled power generation system; the target coupled power generation system includes: new energy power generation resources and non-new energy power generation resources;

[0032] In this embodiment, non-new energy power generation resources include thermal power generation resources or energy storage resources. New energy power generation resources include wind power generation resources and photovoltaic power generation resources. In the specific implementation process, several wind turbines and photovoltaic generators can be combined into the new energy power generation resources. In this embodiment, non-new energy power generation resources include: energy storage resources or thermal power generation resources. In other words, new energy power generation resources (wind power and / or photovoltaic) and thermal power generation resources can be combined into a target coupled power generation system, and new energy power generation resources (wind power and / or photovoltaic) and energy storage resources can also be combined into a target coupled power generation system. The specific composition can be as follows: Figure 2 shown.

[0033] In this step, the target total power generation indicates the total power generation expected to be achieved by the target coupled power generation system; the current power generation indicates the actual total power generation of the target coupled power generation system. In the specific implementation process, the real-time power generation / real-time output of each generator set in the new energy resources and non-new energy resources can be collected in advance, and then the real-time power generation of each generator set in the new energy resources is accumulated to obtain the current power generation of the new energy, and the real-time power generation of each generator set in the non-new energy resources is accumulated to obtain the current power generation of the non-new energy; finally, the current power generation of the new energy and the current power generation of the non-new energy are accumulated to obtain the current total power generation.

[0034] In this step, the load deviation refers to the absolute value of the difference between the target total power generation and the current total power generation, that is, the load deviation |△P|=|P MB -P SJ |.

[0035] Step S102, determining any one of an output replacement parameter of a power generation resource, an output increase parameter of a power generation resource, and an output reduction parameter of a power generation resource based at least on the load deviation, the adjustable amount of the renewable energy power generation, the adjustable amount of the non-renewable energy power generation, and the adjustable amount of the non-renewable energy power generation to obtain a target control instruction;

[0036] In this step, it is possible to determine whether the target coupled power generation system meets the output replacement condition, the power generation output increase condition or the power generation output reduction condition based on the load deviation, the adjustable amount of renewable energy power generation, the adjustable amount of non-renewable energy power generation and the adjustable amount of non-renewable energy power generation. When any of the conditions is met, such as the output replacement condition, the output replacement parameter can be further determined according to the condition to obtain the target control instruction. Similarly, when it is determined that the target coupled power generation system meets the power generation output reduction condition, the output reduction parameter can be further determined according to the condition to obtain the target control instruction.

[0037] Step S103: Control the new energy power generation resources and the non-new energy power generation resources based on the target control instruction.

[0038] In this step, after obtaining the target control instruction, the output parameters of the new energy and the output parameters of the non-new energy can be obtained based on the target control instruction; then the sub-output parameters of each new energy generator set are determined according to the output parameters of the new energy, and similarly, the sub-output parameters of each non-new energy generator set are determined according to the output parameters of the non-new energy, thereby obtaining the secondary control instructions corresponding to each unit, so that the new energy units and non-new energy units can be accurately controlled.

[0039] The method in this embodiment can reasonably and accurately determine the output replacement parameters, output increase parameters or output reduction parameters by determining the load deviation value, the adjustable amount of renewable energy power generation, the adjustable amount of non-renewable energy power generation, and the adjustable amount of non-renewable energy power generation. Therefore, the renewable energy power generation resources and non-renewable energy power generation resources in the target coupling system can be precisely controlled according to the output replacement parameters, output increase parameters or output reduction parameters.

[0040] On the basis of the above embodiments, another embodiment of the present application provides a control method for a coupled power generation system. In this embodiment, when executing step S102, the following method may be specifically adopted:

[0041] Step S1021, comparing the load deviation with a predetermined dead zone power threshold; when the load deviation is less than or equal to the dead zone power threshold δ, executing step S1022; when the load deviation is greater than the dead zone power threshold δ, executing step S1023;

[0042] Step S1022, determining an output replacement condition satisfied by the target coupled power generation system, and determining an output replacement parameter based on the output replacement condition to obtain a target control instruction;

[0043] In this step, the adjustable amount of the renewable energy power generation can be specifically compared with the predetermined replacement dead zone power threshold γ, and the adjustable amount of the renewable energy power generation and the adjustable amount of the non-renewable energy power generation can be respectively compared with the predetermined adjustment threshold value of the non-renewable energy power generation;

[0044] When the adjustable amount of renewable energy power generation is greater than or equal to the replacement dead zone power threshold γ, the adjustable amount of renewable energy power generation is greater than or equal to the adjustment threshold value, the adjustable amount of non-renewable energy power generation is greater than or equal to the adjustment threshold value, and the adjustable amount of non-renewable energy power generation is greater than or equal to the adjustable amount of renewable energy power generation, it is determined that the target coupled power generation system meets the first output replacement condition, and the adjustable amount of renewable energy power generation △P is increased. XNY-UP The output increase parameter of the new energy source and the output reduction parameter of the non-new energy source are determined to obtain the output replacement parameter. In this embodiment, the current amount of the new energy power generation that can be increased is less than the replacement dead zone power threshold (△P XNY-UP <γ), or when the adjustable amount of renewable energy power generation is less than the adjustment threshold value, or the adjustable amount of non-renewable energy power generation is less than the adjustment threshold value, it is determined that the output replacement condition is not met. At this time, the current output parameters of each power generation resource can be used as the target control instruction, that is, the current output parameters of the target coupled power generation system are kept unchanged.

[0045] When the adjustable amount of the new energy power generation power is greater than or equal to the replacement dead zone power threshold γ, the adjustable amount of the new energy power generation power is greater than or equal to the adjustment threshold value, the adjustable amount of the non-new energy power generation power is greater than or equal to the adjustment threshold value, and the adjustable amount of the non-new energy power generation power is less than the adjustable amount of the new energy power generation power, it is determined that the target coupled power generation system meets the second output replacement condition, and the adjustable amount of the non-new energy power generation power is determined as the output increase parameter of the new energy and the output reduction parameter of the non-new energy to obtain the output replacement parameter.

[0046] In this embodiment, when the non-new energy power generation resource is an energy storage power generation resource, when it is determined that the adjustable amount of the new energy power generation is greater than or equal to the replacement dead zone power threshold γ, the adjustable amount of the new energy power generation is greater than or equal to the adjustment threshold value, and the adjustable amount of the non-new energy power generation is greater than or equal to the adjustment threshold value; the current power SOC of the energy storage resource can be further judged. t Is it less than the upper limit of energy storage capacity SOC? U If the current power SOC t Greater than or equal to the upper limit of energy storage capacity SOC U , it is determined that the output replacement condition is not met. At this time, the current output parameters of each power generation resource can be used as the target control instruction, that is, the current output parameters of the target coupled power generation system are kept unchanged; if the current power SOC tLess than the upper limit of energy storage capacity SOC U , it can be further determined whether the target coupled power generation system meets the first output replacement condition or the second output replacement condition.

[0047] Step S1023, determining the power generation output increase conditions satisfied by the target coupled power generation system, and determining the output increase parameters based on the power generation output increase conditions, or determining the power generation output reduction conditions satisfied by the target coupled power generation system, and determining the output reduction parameters based on the power generation output reduction conditions, so as to obtain the target control instruction.

[0048] In this step, during the implementation process, the following steps may be specifically included:

[0049] Step S1023-1: Set the target total power generation P MB Compared with the current total power generation; at the target total power generation P MB Greater than the current total power generation P SJ (ie, △P>0), S1023-2; at the target total power generation P MB Less than or equal to the current total power generation P SJ (△P≤0), execute step S1023-3;

[0050] Step S1023-2, based on the adjustable amount of renewable energy power generation, the load deviation, the adjustable amount of non-renewable energy power generation, and the difference between the load deviation and the adjustable amount of renewable energy power generation, determine the power generation output increase condition satisfied by the target coupling system, and determine the output increase parameter based on the power generation output increase condition;

[0051] This step includes the following steps in the specific implementation process:

[0052] Step 1: Compare the adjustable amount of renewable energy power generation with the load deviation;

[0053] Step 2: When the adjustable amount of the renewable energy power generation is greater than or equal to the load deviation, determine that the target coupled power generation system meets the first power generation output increase condition, and determine the load deviation ΔP as the output increase parameter of the renewable energy to obtain the output increase parameter;

[0054] Step 3: when the adjustable amount of the renewable energy power generation is less than the load deviation, further determining a target difference based on the load deviation and the adjustable amount of the renewable energy power generation, and comparing the adjustable amount of the non-renewable energy power generation with the target difference;

[0055] Step 4: When the adjustable amount of non-renewable energy power generation is greater than or equal to the target difference, determine that the target coupled power generation system meets the second power generation output increase condition, and increase the adjustable amount of renewable energy power generation △P XNY-UPDetermining the output increase parameter of the new energy source and determining the target difference as the output increase parameter of the non-new energy source to obtain the output increase parameter;

[0056] Step 5: When the adjustable amount of non-renewable energy power generation is less than the target difference, determine that the target coupled power generation system meets the third power generation output increase condition, and increase the adjustable amount of renewable energy power generation △P XNY-UP The output increase parameter of the new energy is determined, and the adjustable amount of the non-new energy power generation power is determined as the output increase parameter of the non-new energy to obtain the output increase parameter.

[0057] Step S1023-3, based on the adjustable amount of non-renewable energy power generation and the load deviation, determine the power generation output reduction conditions satisfied by the target coupling system, and determine the output reduction parameters based on the power generation output reduction conditions.

[0058] During the implementation of this step, the specific process is as follows:

[0059] Step 1: Compare the adjustable amount of non-renewable energy power generation with the load deviation;

[0060] Step 2: When the adjustable amount of non-renewable energy power generation is greater than or equal to the load deviation, determine that the target coupling system meets the first power generation output reduction condition, and determine the load deviation as the output reduction parameter of the non-renewable energy to obtain the output reduction parameter;

[0061] Step 3: When the adjustable amount of non-renewable energy power generation is less than the load deviation, determine that the target coupling system meets the second power generation output reduction condition, determine the adjustable amount of non-renewable energy power generation as the output reduction parameter of non-renewable energy, and use the difference between the load deviation and the adjustable amount of non-renewable energy power generation as the output reduction parameter of new energy to obtain the output reduction parameter.

[0062] In this embodiment, by adopting the above method, the output conditions satisfied by the target coupling system (i.e., output replacement conditions, power generation output increase conditions, and power generation output reduction conditions) can be accurately determined, and the output parameters can be reasonably and accurately determined according to the output conditions. Thus, the target control instructions are obtained, which lays the foundation for the subsequent precise control of the target coupling power generation system based on the target control instructions.

[0063] Another embodiment of the present application provides a control method for a coupled power generation system. In this embodiment, when executing step S103, that is, when regulating the target coupled power generation system based on the target control instruction, the output parameters of the new energy and the output parameters of the non-new energy can be further obtained based on the target control instruction; then, based on the output parameters of the new energy and the type of each new energy generator set in the new energy power generation resources, the sub-output parameters of each new energy generator set are determined according to the priority corresponding to the type or the output ratio corresponding to the type. The types include photovoltaic type and wind type, and different levels can be pre-configured for different types, or different output ratios can be pre-configured for different types.

[0064] Take renewable energy power generation resources including photovoltaic power generation resources and wind power generation resources as an example. After obtaining the output parameters of renewable energy through target control instructions, the output parameters of renewable energy can be secondary allocated to obtain the instructions / sub-output parameters of photovoltaic power generation resources and wind power generation resources. The sub-output parameter allocation process includes the following two methods:

[0065] Method 1: secondary allocation based on priority. The priority of wind power for increasing load can be set higher than that of photovoltaic power, and the priority of photovoltaic power for reducing load can be set higher than that of wind power. Therefore, when the new energy instruction increases (that is, when the output parameter of the new energy is obtained as the output increase parameter), wind power is increased first. When wind power cannot complete the increase of the new energy load alone, photovoltaic power generation is increased. When the new energy instruction decreases (that is, when the output parameter of the new energy is obtained as the output reduction parameter), photovoltaic power generation is reduced first. When photovoltaic power cannot complete the reduction of the new energy load alone, wind power generation is reduced.

[0066] Method 2: Perform secondary allocation according to the proportional strategy. Assume that the output ratio of wind power and photovoltaic power is 2:1. When the output parameter of new energy is an increase of 3MW, the wind power output parameter will be increased by 2MW and the photovoltaic output parameter will be increased by 1MW. When wind power or photovoltaic power cannot generate electricity according to the allocated output parameters, the unfinished output parameters will be allocated to the other party. For example, if wind power can only increase the load by 0.5MW, the unfinished 1.5MW will be allocated to photovoltaic power at this time. The final allocation result is that the wind power output parameter increases by 0.5MW and the photovoltaic output parameter increases by 2.5MW.

[0067] Similarly, after obtaining the non-new energy output parameters, the sub-output parameters of each non-new energy generator set can be determined based on the non-new energy output parameters and the priority or output coefficient of each non-new energy generator set in the non-new energy power generation resources, and the corresponding new energy generator set and non-new energy generator set can be controlled based on each of the sub-output parameters. The output coefficient can be set and adjusted according to the operating conditions of each unit.

[0068] Take thermal power generation resources as an example. After obtaining the output parameters of thermal power generation through target control instructions, the output parameters of thermal power generation can be secondary distributed to obtain the instructions / sub-output parameters of each thermal power unit. Sub-output parameter distribution includes the following two methods:

[0069] Method 1: secondary distribution according to the output coefficient (comprehensive coefficient). Assuming that the output coefficients of units 1, 2, and 3 are 1.5, 3, and 4.5 respectively, when the output increase parameter of the thermal power generation resource obtained based on the target control instruction is 9MW (i.e., the output increases by 9MW), the instruction / sub-output parameter of unit 1 is: 9×1.5÷(1.5+3+4.5)=1.5MW, i.e., unit 1 increases by 1.5MW; the instruction / sub-output parameters of units 2 and 3 are similarly increased by 3MW and 4.5MW. When a unit cannot increase according to the assigned instruction, the unfinished output parameters will be allocated to other units according to the comprehensive coefficient. For example, if the command of unit 1 can only increase 0.6MW, the unfinished 0.9MW will be allocated to units 2 and 3. The sub-output parameter obtained by unit 2 from unit 1 is 0.9×3÷(3+4.5)=0.36MW, and the sub-output parameter obtained by unit 3 from unit 1 is 0.9×4.5÷(3+4.5)=0.54MW. Finally, the sub-output increase parameters of units 1, 2, and 3 are 0.6MW, 3.36MW, and 5.04MW respectively. When allocating the comprehensive coefficient strategy, the regulation dead zone of each thermal power unit will be considered. For the command change amount within the dead zone, the command change amount of the unit will be allocated to other units according to the comprehensive coefficient. For example, assuming that the regulation dead zones of units 1, 2, and 3 are all 2MW, since the command change after allocation to unit 1 is 1.5MW, which is within the dead zone, 1.5MW will be allocated to units 2 and 3. The sub-output increase parameter obtained by unit 2 from unit 1 is 1.5×3÷(3+4.5)=0.6MW, and the sub-output increase parameter obtained by unit 3 from unit 1 is 1.5×4.5÷(3+4.5)=0.9MW. Finally, the sub-output increase parameters of units 1, 2, and 3 are 0MW, 3.6MW, and 6.4MW, respectively.

[0070] Method 2: secondary allocation according to priority. Assuming that the load increase priority of units 1, 2, and 3 decreases in sequence, and the load reduction priority increases in sequence, when the thermal power increase parameter is obtained, the instruction / parameter of unit 1 is increased first. When unit 1 cannot complete the increase in thermal power load alone, the instruction / parameter of unit 2 is increased. When units 1 and 2 cannot complete the increase in thermal power load, the instruction / parameter of unit 3 is increased. When the thermal power instruction is reduced, the instruction / parameter of unit 3 is reduced first. When unit 3 cannot complete the reduction of thermal power load alone, the instruction / parameter of unit 2 is reduced. When units 3 and 2 cannot complete the reduction of thermal power load, the instruction / parameter of unit 1 is reduced.

[0071] In this embodiment, by adopting the above method, the secondary control instructions / sub-output parameters corresponding to each unit can be reasonably and accurately determined, so that the new energy units and non-new energy units can be accurately controlled.

[0072] The method in this application is further explained and illustrated below in conjunction with specific scenarios.

[0073] Taking the scenario where the target coupling system includes new energy power generation resources and energy storage resources as an example, when the method in this application is used to determine the target control instruction, the specific process can be as follows: Figure 3 As shown, including:

[0074] Step ① (Logical triggering process): According to the actual power PSJ of the whole after coupling and the target power of the whole after coupling (i.e., the power generation instruction P MB ) Calculate the load deviation △P (△P=P MB -P SJ ), determine whether the load deviation is within the regulation dead zone δ. If the negative deviation is within the regulation dead zone, proceed to step ②; if the negative deviation is not within the regulation dead zone, and the target power is greater than the current actual power, proceed to step ③; if the negative deviation is not within the regulation dead zone, and the target power is less than the current actual power, proceed to step ④.

[0075] In the specific implementation process of this embodiment, the real-time output of various power generation resources can be obtained in advance. FD , Photovoltaic real-time output P GF 、Real-time output of energy storage P CN .

[0076] Wind and solar power output can be adjusted. For example, wind power output can be adjusted upward by △P FD-UP , Photovoltaic output can be adjusted upward △P GF-UP . Based on the wind power output, the adjustable amount △P FD-UP , Photovoltaic output can be adjusted upward △P GF-UP , determine the adjustable amount of renewable energy output, that is, the adjustable amount of renewable energy power generation △P XNY-UP .

[0077] △P XNY-UP =△P FD-UP +△P GF-UP

[0078] At the same time, the energy storage charging and discharging conditions and adjustable quantities can be obtained. For example, the current energy storage capacity SOC t , Energy storage capacity lower limit SOC L , Energy storage capacity upper limit SOC U 、Energy storage active output upper limit P CN-U , Energy storage can be adjusted downward △PCN-DOWN (△P CN-DOWN =SOC t -SOC L ), the amount of energy storage that can be adjusted upward △P CN-UP (△P CN-UP =SOC U -SOC t ), energy storage adjustment threshold value φ. And the adjustment dead zone power threshold δ and the replacement dead zone power threshold γ can be determined.

[0079] Step ② (output replacement process): Perform new energy-energy storage output replacement to increase new energy output and reduce energy storage output. The replacement process includes: first, compare the adjustable amount of new energy output △P XNY-UP and the size of the replacement dead zone γ, if △P XNY-UP <γ, no replacement is performed and all command / output parameters remain unchanged; if △P XNY-UP ≥γ, then determine whether the energy storage can reduce the load (the amount of load that can be replaced △P XNY-UP And the energy storage can be adjusted downward △P CN-DOWN are greater than the energy storage adjustment threshold value φ, and the current power SOC t Less than the upper limit of energy storage capacity SOC U ); if the energy storage resource cannot reduce the load, all command / output parameters remain unchanged; if the energy storage resource can reduce the load and △P CN-DOWN ≥△P XNY-UP , reduce the energy storage output by △P XNY-UP , the output of new energy increases △P XNY-UP ; If energy storage can reduce load and △P CN-DOWN <△P XNY-UP , reducing the output of energy storage resources by △P CN-DOWN , the output of new energy increases △P CN-DOWN .

[0080] Step ③ (output improvement process): Theoretically adjust the output of new energy sources by △P XNY-UP Compared with the power demand △P, if △P XNY-UP ≥△P, then the new energy instruction is increased by △P; if △P XNY-UP <△P, then the new energy instruction will be increased by △P XNY-UP At the same time, if the energy storage can be increased, △P CN-UP ≥△P-△P XNY-UP , then the energy storage instruction is increased by △P-△P XNY-UP , if the energy storage can be adjusted upward △P CN-UP <△P-△P XNY-UP , then the energy storage instruction is increased by △P CN-UP .

[0081] Step ④ (output reduction process): the amount of energy storage that can be adjusted downward △P CN-DOWN Compared with the power demand △P, if △P CN-DOWN >|△P|, then reduce the energy storage output |△P| (when the energy storage output is negative, it means charging); if △P CN-DOWN <|△P|, then reduce the energy storage output △P CN-DOWN At the same time, reduce the output of new energy |△P|-△P CN-DOWN .

[0082] In this embodiment, the new energy output parameters (increase / decrease in output of new energy resources) and the energy storage resource output parameters (increase / decrease in output of energy storage resources) can be obtained through the above process, thereby obtaining the target control instructions, which lays the foundation for the subsequent control of the target coupling system based on the target control instructions.

[0083] In this embodiment, the method in this application is further explained and illustrated in combination with another scenario. Taking the scenario where the target coupling system includes new energy power generation resources and thermal power generation resources as an example, when the method in this application is used to determine the target control instruction, the specific process can be as follows: Figure 4 As shown, including:

[0084] Step ① (Logical triggering process): According to the overall actual power P after the current coupling SJ The overall target power after coupling (i.e., power generation instruction P MB ) Calculate the load deviation △P (△P=P MB -P SJ ), determine whether the load deviation is within the regulation dead zone δ. If the negative deviation is within the regulation dead zone (i.e. |△P| is not greater than δ, i.e. |△P| is less than or equal to δ), proceed to step ②; if the negative deviation is not within the regulation dead zone (i.e. |△P| is greater than δ), and the target power is greater than the current actual power (i.e. △P>0), proceed to step ③; if the negative deviation is not within the regulation dead zone, and the target power is less than the current actual power (i.e. △P is not greater than 0), proceed to step ④.

[0085] In the specific implementation process of this embodiment, the real-time output of various power generation resources can be obtained in advance. HD-i (i=1,2,……,N), wind power real-time output P FD , Photovoltaic real-time output P GF .

[0086] Wind and solar power output can be adjusted (power generation can be adjusted). For example, wind power output can be adjusted upward △P FD-UP , Photovoltaic output can be adjusted upward △P GF-UP . Based on the wind power output, the adjustable amount △P FD-UP , Photovoltaic output can be adjusted upward △PGF-UP , determine the adjustable amount of renewable energy output, that is, the adjustable amount of renewable energy power generation △P XNY-UP .

[0087] △P XNY-UP =△P FD-UP +△P GF-UP

[0088] At the same time, the upper limit of thermal power active output P can be determined according to the operating characteristics of thermal power units. HD-U 、The lower limit of thermal power active output P HD-L , Thermal power active power can be adjusted upward △P HD-UP , thermal power active power can be adjusted downward △P HD-DOWN , thermal power unit type (heating unit, ordinary unit), thermal power unit coal consumption characteristic curve f MH-i Etc. In addition, the dead zone power adjustment δ, the dead zone power replacement threshold γ, and the thermal power adjustment threshold λ can also be determined.

[0089] Step ② (output replacement process): Replace the output of new energy with thermal power to increase the output of new energy and reduce the output of thermal power. The replacement process includes: first, compare the output of new energy that can be adjusted upward △P XNY-UP and the size of the replacement dead zone γ, if △P XNY-UP <γ, no replacement is performed and all command / output parameters remain unchanged; if △P XNY-UP ≥γ, then determine whether thermal power can reduce load (replaceable load △P XNY-UP And thermal power active power can be adjusted downward △P HD-DOWN If thermal power cannot reduce load, all command / output parameters remain unchanged; if thermal power can reduce load and △P HD-DOWN ≥△P XNY-UP , then the thermal power command / output parameter decreases △P XNY-UP , new energy command / output parameter rises △P XNY-UP If thermal power can reduce load, and △P HD-DOWN <△P XNY-UP , then the thermal power command / output parameter decreases △P HD-DOWN , new energy command / output parameter rises △P HD-DOWN .

[0090] Step ③ (output improvement process): The output of new energy can be increased by △P XNY-UP Compare with the power demand △P; if △P XNY-UP ≥△P, then increase the new energy command / output parameter by △P; if △P XNY-UP <△P, then increase the new energy command / output parameter by △P XNY-UP At the same time, if thermal power can increase output △P HD-UP ≥△P-△PXNY-UP , then the thermal power command / output parameter is increased by △P-△P XNY-UP , if △P HD-UP <△P-△P XNY-UP , then the thermal power command / output parameter is increased by △P HD-UP .

[0091] Step ④ (output reduction process): The load △P of thermal power can be reduced HD-DOWN Compare with the power demand △P; if △P HD-DOWN ≥|△P|, then the thermal power output reduction parameter is determined to be |△P|; if △P HD-DOWN <|△P|, the thermal power command / output parameter decreases by △P HD-DOWN , while reducing the output of new energy |△P|-△P HD-DOWN .

[0092] In this embodiment, the new energy output parameters (increase / decrease in output of new energy resources) and the thermal power generation resource output parameters (increase / decrease in output of thermal power generation resources) can be obtained through the above process, thereby obtaining the target control instructions, which lays the foundation for the subsequent control of the target coupling system based on the target control instructions.

[0093] Another embodiment of the present application provides a storage medium for coupling a control device of a power generation system, such as Figure 5 As shown, including:

[0094] A deviation determination module, configured to determine a load deviation based on a current total power generation power and a target total power generation power of a target coupled power generation system; the target coupled power generation system includes: new energy power generation resources and non-new energy power generation resources;

[0095] a parameter determination module, configured to determine any one of an output replacement parameter of a power generation resource, an output increase parameter of a power generation resource, and an output reduction parameter of a power generation resource based at least on the load deviation, the adjustable amount of the renewable energy power generation, the adjustable amount of the non-renewable energy power generation, and the adjustable amount of the non-renewable energy power generation, so as to obtain a target control instruction;

[0096] A control module is used to control the renewable energy power generation resources and non-renewable energy power generation resources based on the target control instruction.

[0097] In the specific implementation process of this embodiment, the parameter determination module includes a comparison unit, a first determination unit and a second determination unit:

[0098] The comparison unit is used to: compare the load deviation with a predetermined regulation dead zone power threshold;

[0099] The first determination unit is used to: when the load deviation is less than or equal to the regulation dead zone power threshold, determine the output replacement condition satisfied by the target coupled power generation system, and determine the output replacement parameter based on the output replacement condition to obtain the target control instruction;

[0100] The second determination unit is used to: when the absolute value of the load deviation is greater than the regulation dead zone power threshold, determine the power generation output increase condition satisfied by the target coupled power generation system, and determine the output increase parameter based on the power generation output increase condition, or determine the power generation output reduction condition satisfied by the target coupled power generation system, and determine the output reduction parameter based on the power generation output reduction condition, so as to obtain the target control instruction.

[0101] In the specific implementation process of this embodiment, the first determination unit is used to: compare the adjustable amount of renewable energy power generation with a predetermined replacement dead zone power threshold, and compare the adjustable amount of renewable energy power generation and the adjustable amount of non-renewable energy power generation with predetermined non-renewable energy power generation adjustment thresholds respectively; when the adjustable amount of renewable energy power generation is greater than or equal to the replacement dead zone power threshold, the adjustable amount of renewable energy power generation is greater than or equal to the adjustment threshold value, the adjustable amount of non-renewable energy power generation is greater than or equal to the adjustment threshold value, and the adjustable amount of non-renewable energy power generation is greater than or equal to the adjustable amount of renewable energy power generation, it is determined that the target coupled power generation system meets the first output replacement condition. The method comprises the following steps: a first step of determining the output replacement condition of the target coupled power generation system and determining the adjustable amount of the renewable energy power generation as the output increase parameter of the renewable energy and the output reduction parameter of the non-renewable energy so as to obtain the output replacement parameter; when the adjustable amount of the renewable energy power generation system is greater than or equal to the replacement dead zone power threshold, the adjustable amount of the renewable energy power generation system is greater than or equal to the adjustment threshold value, the adjustable amount of the non-renewable energy power generation system is greater than or equal to the adjustment threshold value, and the adjustable amount of the non-renewable energy power generation system is less than the adjustable amount of the renewable energy power generation system, determining that the target coupled power generation system meets the second output replacement condition, and determining the adjustable amount of the non-renewable energy power generation system as the output increase parameter of the renewable energy and the output reduction parameter of the non-renewable energy so as to obtain the output replacement parameter.

[0102] In the specific implementation process of this embodiment, the second determination unit is used to: compare the target total power generation with the current total power generation; when the target total power generation is greater than the current total power generation, based on the adjustable amount of renewable energy power generation, the load deviation, the adjustable amount of non-renewable energy power generation, the load deviation and the difference between the adjustable amount of renewable energy power generation, determine the power generation output increase condition satisfied by the target coupling system, and determine the output increase parameter based on the power generation output increase condition; when the target total power generation is less than or equal to the current total power generation, based on the adjustable amount of non-renewable energy power generation and the load deviation, determine the power generation output reduction condition satisfied by the target coupling system, and determine the output reduction parameter based on the power generation output reduction condition.

[0103] In the specific implementation process of this embodiment, the second determination unit is specifically used to: compare the adjustable amount of renewable energy power generation with the load deviation; when the adjustable amount of renewable energy power generation is greater than or equal to the load deviation, determine that the target coupled power generation system meets the first power generation output increase condition; when the adjustable amount of renewable energy power generation is less than the load deviation, determine the target difference based on the load deviation and the adjustable amount of renewable energy power generation, and compare the adjustable amount of non-renewable energy power generation with the target difference; when the adjustable amount of non-renewable energy power generation is greater than or equal to the target difference, determine that the target coupled power generation system meets the second power generation output increase condition; when the adjustable amount of non-renewable energy power generation is less than the target difference, determine that the target coupled power generation system meets the third power generation output increase condition.

[0104] In the specific implementation process of this embodiment, the second determination unit is specifically used to: when the first power generation output increase condition is met, determine the load deviation as the output increase parameter of the new energy to obtain the output increase parameter; when the second power generation output increase condition is met, determine the adjustable amount of the new energy power generation power as the output increase parameter of the new energy and determine the target difference as the output increase parameter of the non-new energy to obtain the output increase parameter; when the third power generation output increase condition is met, determine the adjustable amount of the new energy power generation power as the output increase parameter of the new energy and determine the adjustable amount of the non-new energy power generation power as the output increase parameter of the non-new energy to obtain the output increase parameter.

[0105] In the specific implementation process of this embodiment, the second determination unit is specifically used to: compare the adjustable amount of non-renewable energy power generation with the load deviation; when the adjustable amount of non-renewable energy power generation is greater than or equal to the load deviation, determine that the target coupling system meets the first power generation output reduction condition, and determine the load deviation as the output reduction parameter of the non-renewable energy to obtain the output reduction parameter; when the adjustable amount of non-renewable energy power generation is less than the load deviation, determine that the target coupling system meets the second power generation output reduction condition, determine the adjustable amount of non-renewable energy power generation as the output reduction parameter of the non-renewable energy, and use the difference between the load deviation and the adjustable amount of non-renewable energy power generation as the output reduction parameter of the new energy to obtain the output reduction parameter.

[0106] In the specific implementation process of this embodiment, the control module is specifically used to: obtain the output parameters of new energy and the output parameters of non-new energy based on the target control instruction; determine the sub-output parameters of each new energy generator set based on the output parameters of the new energy and the type of each new energy generator set in the new energy power generation resources according to the priority corresponding to the type or the output ratio corresponding to the type; determine the sub-output parameters of each non-new energy generator set based on the non-new energy output parameters and the priority or output coefficient of each non-new energy generator set in the non-new energy power generation resources according to the priority or output coefficient; control the corresponding new energy generator set and non-new energy generator set based on each of the sub-output parameters.

[0107] The device in this embodiment can reasonably and accurately determine the output replacement parameters, output increase parameters or output reduction parameters by determining the load deviation value, the adjustable amount of renewable energy power generation, the adjustable amount of non-renewable energy power generation, and the adjustable amount of non-renewable energy power generation. Therefore, the renewable energy power generation resources and non-renewable energy power generation resources in the target coupling system can be accurately controlled according to the output replacement parameters, output increase parameters or output reduction parameters.

[0108] Another embodiment of the present application provides a storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the following method steps are implemented:

[0109] Step 1: Determine the load deviation based on the current total power generation power and the target total power generation power of the target coupled power generation system; the target coupled power generation system includes: new energy power generation resources and non-new energy power generation resources;

[0110] Step 2: determining any one of the output replacement parameters, output increase parameters and output reduction parameters of the power generation resources based on at least the load deviation, the adjustable amount of the renewable energy power generation, the adjustable amount of the non-renewable energy power generation and the adjustable amount of the non-renewable energy power generation to obtain a target control instruction;

[0111] Step three: controlling the renewable energy power generation resources and the non-renewable energy power generation resources based on the target control instruction.

[0112] The specific implementation process of the above method steps can refer to any of the above embodiments of the control method for a coupled power generation system, and this embodiment will not be repeated here.

[0113] In the present application, by determining the load deviation value, the adjustable amount of renewable energy power generation, the adjustable amount of non-renewable energy power generation, and the adjustable amount of non-renewable energy power generation, the output replacement parameter, the output increase parameter, or the output reduction parameter can be reasonably and accurately determined, so that the renewable energy power generation resources and non-renewable energy power generation resources in the target coupling system can be precisely controlled according to the output replacement parameter, the output increase parameter, or the output reduction parameter.

[0114] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A control method for a coupled power generation system, characterized in that: include: Determining a load deviation based on a current total power generation power of the target coupled power generation system and a target total power generation power; The target coupled power generation system includes: new energy power generation resources and non-new energy power generation resources; Determine any one of an output replacement parameter of a power generation resource, an output increase parameter of a power generation resource, and an output reduction parameter of a power generation resource based at least on the load deviation, the adjustable amount of the renewable energy power generation, the adjustable amount of the non-renewable energy power generation, and the adjustable amount of the non-renewable energy power generation to obtain a target control instruction; The new energy power generation resources and non-new energy power generation resources are controlled based on the target control instruction.

2. The method according to claim 1, characterized in that The step of determining any one of an output replacement parameter, an output increase parameter, and an output reduction parameter of a power generation resource based at least on the load deviation, the adjustable amount of renewable energy power generation, the adjustable amount of non-renewable energy power generation, and the adjustable amount of non-renewable energy power generation to obtain a target control instruction specifically includes: comparing the load deviation with a predetermined regulation dead-band power threshold; When the load deviation is less than or equal to the regulation dead zone power threshold, determining an output replacement condition satisfied by the target coupled power generation system, and determining an output replacement parameter based on the output replacement condition to obtain a target control instruction; When the absolute value of the load deviation is greater than the regulation dead zone power threshold, the power generation output increase condition satisfied by the target coupled power generation system is determined, and the output increase parameter is determined based on the power generation output increase condition, or the power generation output reduction condition satisfied by the target coupled power generation system is determined, and the output reduction parameter is determined based on the power generation output reduction condition, so as to obtain the target control instruction.

3. The method according to claim 2, characterized in that Determining the output replacement condition satisfied by the target coupled power generation system, and determining the output replacement parameter based on the output replacement condition, specifically including: Compare the adjustable amount of renewable energy power generation with the predetermined replacement dead zone power threshold, and compare the adjustable amount of renewable energy power generation and the adjustable amount of non-renewable energy power generation with the predetermined non-renewable energy power generation threshold respectively; When the adjustable amount of the renewable energy power generation power is greater than or equal to the replacement dead zone power threshold, the adjustable amount of the renewable energy power generation power is greater than or equal to the adjustment threshold value, the adjustable amount of the non-renewable energy power generation power is greater than or equal to the adjustment threshold value, and the adjustable amount of the non-renewable energy power generation power is greater than or equal to the adjustable amount of the renewable energy power generation power, it is determined that the target coupled power generation system meets the first output replacement condition, and the adjustable amount of the renewable energy power generation power is determined as the output increase parameter of the renewable energy and the output reduction parameter of the non-renewable energy, so as to obtain the output replacement parameter; When the adjustable amount of the new energy power generation power is greater than or equal to the replacement dead zone power threshold, the adjustable amount of the new energy power generation power is greater than or equal to the adjustment threshold value, the adjustable amount of the non-new energy power generation power is greater than or equal to the adjustment threshold value, and the adjustable amount of the non-new energy power generation power is less than the adjustable amount of the new energy power generation power, it is determined that the target coupled power generation system meets the second output replacement condition, and the adjustable amount of the non-new energy power generation power is determined as the output increase parameter of the new energy and the output reduction parameter of the non-new energy to obtain the output replacement parameter.

4. The method according to claim 2, characterized in that The target coupled power generation system determines the power output increase condition satisfied by the target coupled power generation system, and determines the output increase parameter based on the power output increase condition, or determines the power output reduction condition satisfied by the target coupled power generation system, and determines the output reduction parameter based on the power output reduction condition, so as to obtain the target control instruction, specifically including: comparing the target total generated power with the current total generated power; When the target total power generation is greater than the current total power generation, based on the adjustable amount of renewable energy power generation, load deviation, the adjustable amount of non-renewable energy power generation, and the difference between the load deviation and the adjustable amount of renewable energy power generation, the power generation output increase condition satisfied by the target coupling system is determined, and the output increase parameter is determined based on the power generation output increase condition; When the target total power generation is less than or equal to the current total power generation, the power generation output reduction conditions satisfied by the target coupling system are determined based on the adjustable amount of non-renewable power generation and the load deviation, and the output reduction parameters are determined based on the power generation output reduction conditions.

5. The method according to claim 4, characterized in that The conditions for increasing power generation output satisfied by the target coupling system are determined based on the adjustable amount of renewable energy power generation, load deviation, the adjustable amount of non-renewable energy power generation, and the difference between the load deviation and the adjustable amount of renewable energy power generation, specifically including: Compare the adjustable amount of renewable energy power generation with the load deviation; When the adjustable amount of the renewable energy power generation power is greater than or equal to the load deviation, determining that the target coupled power generation system meets the first power generation output increase condition; When the adjustable amount of the renewable energy power generation is less than the load deviation, a target difference is determined based on the load deviation and the adjustable amount of the renewable energy power generation, and the adjustable amount of the non-renewable energy power generation is compared with the target difference; When the adjustable amount of non-new energy power generation is greater than or equal to the target difference, determining that the target coupled power generation system meets the second power generation output increase condition; When the adjustable amount of non-renewable energy power generation is less than the target difference, it is determined that the target coupled power generation system meets the third power generation output increase condition.

6. The method according to claim 5, characterized in that The determining of the output increase parameter based on the power generation output increase condition specifically includes: When the first power generation output increase condition is met, the load deviation is determined as the output increase parameter of the new energy source to obtain the output increase parameter; When the second power generation output increase condition is met, the adjustable amount of the new energy power generation power is determined as the output increase parameter of the new energy and the target difference is determined as the output increase parameter of the non-new energy to obtain the output increase parameter; When the third power generation output increase condition is met, the adjustable amount of new energy power generation is determined as the output increase parameter of the new energy and the adjustable amount of non-new energy power generation is determined as the output increase parameter of the non-new energy to obtain the output increase parameter.

7. The method according to claim 4, characterized in that The step of determining the power output reduction condition satisfied by the target coupling system based on the adjustable amount of non-renewable power generation and the load deviation, and determining the output reduction parameter based on the power output reduction condition, specifically includes: Compare the adjustable amount of non-renewable energy generation power with the load deviation; When the adjustable amount of non-renewable energy power generation is greater than or equal to the load deviation, it is determined that the target coupling system meets the first power generation output reduction condition, and the load deviation is determined as the output reduction parameter of the non-renewable energy to obtain the output reduction parameter; When the adjustable amount of non-renewable energy power generation is less than the load deviation, it is determined that the target coupling system meets the second power generation output reduction condition, the adjustable amount of non-renewable energy power generation is determined as the output reduction parameter of non-renewable energy, and the difference between the load deviation and the adjustable amount of non-renewable energy power generation is used as the output reduction parameter of new energy to obtain the output reduction parameter.

8. The method according to any one of claims 1 to 7, characterized in that: The controlling the new energy power generation resources and the non-new energy power generation resources based on the target control instruction specifically includes: Acquire output parameters of new energy and output parameters of non-new energy based on the target control instruction; Based on the output parameters of the new energy and the types of each new energy generator set in the new energy power generation resources, the sub-output parameters of each new energy generator set are determined according to the priority corresponding to the type or the output ratio corresponding to the type, Based on the non-new energy output parameter and the priority or output coefficient of each non-new energy power generation group in the non-new energy power generation resource, determine the sub-output parameter of each non-new energy power generation group according to the priority or output coefficient; Based on each of the sub-output parameters, the corresponding new energy generator set and non-new energy generator set are controlled.

9. A control device for a coupled power generation system, characterized in that: include: A deviation determination module, used for determining a load deviation based on a current total power generation power of a target coupled power generation system and a target total power generation power; The target coupled power generation system includes: new energy power generation resources and non-new energy power generation resources; a parameter determination module, configured to determine any one of an output replacement parameter of a power generation resource, an output increase parameter of a power generation resource, and an output reduction parameter of a power generation resource based at least on the load deviation, the adjustable amount of the renewable energy power generation, the adjustable amount of the non-renewable energy power generation, and the adjustable amount of the non-renewable energy power generation, so as to obtain a target control instruction; A control module is used to control the renewable energy power generation resources and non-renewable energy power generation resources based on the target control instruction.

10. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the control method for a coupled power generation system according to any one of claims 1 to 8 are implemented.

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