Adaptive matching method and system for rectifier units with heavy load and high proportion of new energy

Abstract

The present invention belongs to the field of power generation technology and provides a method and system for adaptive matching rectifier units with heavy loads and a high proportion of renewable energy. The method first selects a variety of possible operating mode combinations based on the power source output boundary and the load-side capacity boundary. For each possible mode, the method simulates the operating conditions of each section of the power grid based on the boundary conditions of zero and full renewable energy generation, analyzes various indicators, and ultimately uses a superior-inferior solution distance optimization method to determine the degree to which each possible solution approaches the ideal indicator. The optimal combination is then determined based on the final evaluation value. This method solves the key problem of adaptively matching the operating modes of a local power grid system containing sources, networks, and loads under the background of an increasing proportion of renewable energy access, providing decision support for the optimized scheduling of local power grids.

Description

Technical Field

[0001] The present invention belongs to the field of energy dispatch optimization, and in particular relates to an adaptive matching method and system for rectifier units used for heavy-load high-proportion new energy. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] At present, the proportion of new energy access to enterprises' self-provided power grids is required to continue to increase. However, due to internal and external limiting factors such as the operating status of network-related equipment and changes in operating parameters, the system operation mode cannot be solidified. When the source-grid-load boundary conditions are constantly changing, relying solely on manpower to calculate the distribution mode of rectifier units has seriously lagged behind the changes in the power supply and consumption relationship. The lag in the adjustment of the distribution mode will bring about a series of problems such as wind power abandonment, thermal power units not generating electricity according to the optimal economic sequence, and reduced aluminum production capacity, which will seriously affect the normal production order and directly affect the economic benefits. Summary of the Invention

[0004] In order to solve at least one technical problem existing in the above-mentioned background technology, the present invention provides an adaptive matching method and system for rectifier units for heavy loads and high proportions of new energy. By analyzing the source-load supply and demand relationship of the local power grid, it obtains all available combinations of rectifier units on the power consumption side in the process of new energy output from zero to full output, determines evaluation indicators such as the local power grid power generation economy, wind (light) abandonment rate, increase in external power purchase, increase in load reduction, and stable matching imbalance, and uses the superior and inferior solution distance method to sort all combinations to obtain the optimal operating mode.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A first aspect of the present invention provides an adaptive matching method for a rectifier unit with a heavy load and a high proportion of new energy, comprising the following steps:

[0007] Obtain rectifier unit operating data;

[0008] Based on the rectifier unit operating data, combined with the power output boundary and the load side capacity boundary, multiple operating mode combinations are screened out;

[0009] For each candidate combination, the operation status of each section of the power grid is simulated based on the power shortage / surplus and full / zero generation of renewable energy, and various indicators are analyzed;

[0010] Based on the analysis results of all indicators, the superior and inferior solution distance optimization method is used to determine the degree to which the operating mode of each candidate rectifier unit approaches the ideal indicator, and the optimal combination is obtained based on the final evaluation value;

[0011] The optimal results are fed back to provide decision support information.

[0012] A second aspect of the present invention provides an adaptive matching system for a rectifier unit with a heavy load and a high proportion of new energy, comprising:

[0013] Data acquisition module, used to obtain rectifier unit operation data;

[0014] The candidate combination screening module is used to screen out multiple candidate operation mode combinations based on the rectifier unit operation data, combined with the power output boundary and the load side capacity boundary;

[0015] The section analysis module is used to simulate the operation of each section of the power grid based on the power shortage / surplus and full or zero generation of renewable energy for each candidate combination, and analyze various indicators;

[0016] The adaptive matching module is used to determine the degree to which the operating mode of each candidate rectifier unit approaches the ideal indicator based on the analysis results of all indicators, and to determine the optimal combination based on the final evaluation value;

[0017] The decision generation module is used to transmit the optimal results back to provide decision support information.

[0018] A third aspect of the present invention provides a computer-readable storage medium.

[0019] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned adaptive matching method for a rectifier unit with a heavy load and a high proportion of new energy.

[0020] A fourth aspect of the present invention provides a computer device.

[0021] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the adaptive matching method for a rectifier unit with a heavy load and a high proportion of new energy are implemented as described above.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention first screens out a variety of candidate operating mode combinations based on the power source output boundary and the load side capacity boundary, simulates the operating conditions of each section of the power grid according to the two boundary conditions of zero generation and full generation of new energy for each candidate mode, analyzes various indicators, and finally adopts the superiority and inferior solution distance optimization method to judge the degree to which each candidate scheme approaches the ideal indicator. The most suitable combination is obtained according to the final evaluation value, which solves the key problem of adaptive matching of the operating modes of the local power grid system containing source, network and load under the background condition of increasing proportion of new energy access, and provides decision support for the optimized scheduling of the local power grid.

[0024] The present invention optimizes the operating mode of the enterprise's self-owned microgrid based on a high proportion of clean energy utilization, can realize automatic analysis and calculation under a wide range of changes in the grid operation boundary conditions, and provide an optimal combination plan for rectifier units that comprehensively considers system safety, economy, and reliability. It can adjust the operating mode of the rectifier units in a timely and real-time manner, achieve a good balance between safe and economical electricity use, further optimize the electricity structure of high-energy-consuming industries, and deeply explore the space for reducing electricity costs.

[0025] Advantages of additional aspects of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 This is a flow chart of the adaptive matching method for rectifier units with heavy loads and a high proportion of new energy sources according to the present invention;

[0028] Figure 2 This is a block diagram of the adaptive matching of rectifier units used for heavy-load and high-proportion new energy sources according to the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Example 1

[0033] like Figure 1-Figure 2 As shown, this embodiment provides an adaptive matching method for a rectifier unit with a heavy load and a high proportion of new energy, comprising the following steps:

[0034] Step 1: Obtain the real-time operating data of the rectifier unit from the reporting system database;

[0035] For example, the data includes:

[0036] The upper and lower limits of thermal power generation unit power output, grid connection mark and status;

[0037] New energy boost transformer export power limit, grid connection mark and status;

[0038] The upper and lower power limits and operating status of the aluminum plant rectifier units;

[0039] Aluminum plant power transformer upper and lower limits, grid connection mark and status;

[0040] The total load of each production line in the aluminum plant and the upper limit of the external interconnection line power. (The grid connection mark is used to distinguish whether the equipment is connected to an isolated grid system or a networked system. The status is divided into two types: operation and maintenance.)

[0041] At the same time, the optimization results can be fed back and published through the reporting system program to provide real-time decision support information.

[0042] Step 2: Based on the real-time data in the database, multiple operation mode combinations are screened out in combination with the power output boundary and the load side capacity boundary;

[0043] According to the operating boundaries of the grid-related equipment, the power balance of the power grid is determined. Combined with the tie line limit, the basic condition is that the load adjustment range on both the isolated grid side and the grid side is greater than or equal to the output change of the power supply on the same side. That is, the load carried by the rectifier unit is greater than the maximum power supply capacity of the corresponding power supply side. Combined with the power limit of the production series, multiple unequal restriction relationships are formed. The enumeration method is used to eliminate all combinations that do not meet the restriction conditions to obtain the candidate operation mode combination.

[0044] Specifically include:

[0045] According to the output upper limit of the thermal power unit Lower limit Factory power consumption rate R n And the power supply network logo SF n Calculate the upper and lower limits of thermal power supply on the isolated grid side and the upper and lower limits of thermal power supply on the grid side respectively;

[0046] The calculation formula for the upper and lower limits of thermal power supply on the isolated grid side is:

[0047]

[0048] The calculation formula for the upper and lower limits of the grid-connected thermal power supply is:

[0049]

[0050] According to the upper limit of the output of the new energy main transformer And the power supply network logo SN n The upper and lower limits of the new energy power supply capacity are calculated respectively, and the calculation formula is:

[0051]

[0052] The load on the electricity consumption side includes power load and rectifier load. The total load of different production series are L1, L2, and L3 respectively, and the number of rectifier units are N1, N2, and N3 respectively.

[0053] The power load is constant and is connected according to the power supply network mark ST n Count the power load of L1 production series, L2 production series and L3 production series respectively;

[0054] The power load of the L1 production series is:

[0055]

[0056] The power load of L2 production series is:

[0057]

[0058] The power load of the L3 production series is:

[0059]

[0060] Based on the above data, calculate the power balance status of the local power grid under the current power supply capacity:

[0061]

[0062] As one or more embodiments, the combined production series power limits form multiple unequal limit relationships, and the combination of candidate operating modes is obtained by eliminating all combinations that do not meet the limit conditions by enumeration method, including:

[0063] In order to meet the economical operation of the local power grid, the capacity of the isolated grid rectifier unit must not be less than the power supply upper limit of the isolated grid thermal power unit. The network side is slightly different according to the operation conditions of the local power grid, so screening is carried out under the two conditions of power surplus and power shortage.

[0064] When the tie line limit PC is less than 0, it indicates that the system has a power shortage. The gap is supplemented by purchasing electricity within the tie line limit PC. When the shortage exceeds the tie line limit PC, the power consumption side reduces the load to make adjustments.

[0065] In the power shortage state, the corresponding screening conditions are obtained according to the size of the power gap, including:

[0066] When the shortfall amount ≥ wind power supply + tie line limit, the first screening condition is obtained;

[0067]

[0068] When the shortfall is less than the wind power supply + tie line limit, the second screening condition is obtained;

[0069]

[0070] When the shortage amount ≥ wind power supply and wind power supply ≥ tie line limit, the third screening condition is obtained;

[0071]

[0072] When the tie line limit value ≥ the shortfall amount and the shortfall amount ≥ the wind power supply, the fourth screening condition is obtained;

[0073]

[0074] When wind power supply ≥ shortage amount and shortage amount ≥ tie line limit, the fifth screening condition is obtained;

[0075]

[0076] When the tie line limit value ≥ the shortfall value and the wind power supply value ≥ the tie line limit value, the sixth screening condition is obtained;

[0077]

[0078] In the state of surplus power, the corresponding screening conditions are obtained based on the maximum and minimum power supply of the networked thermal power:

[0079] When the power surplus is greater than the maximum power supply of the networked thermal power plant - the minimum power supply of the networked thermal power plant, the seventh screening condition is obtained;

[0080] Isolated grid peak load regulation capacity = power surplus - (maximum grid power supply - minimum grid power supply), that is:

[0081]

[0082] but:

[0083] When the power surplus is ≤ the maximum power supply of the networked thermal power plant - the minimum power supply of the networked thermal power plant, the eighth screening condition is obtained.

[0084]

[0085] Step 3: For each candidate combination, simulate the operation of each section of the power grid based on power shortage / surplus and full / zero generation of renewable energy, and analyze various indicators, including:

[0086] The operation status of each section of the power grid is simulated for the power shortage state and zero renewable energy generation stage, the power surplus state and zero renewable energy generation stage, and the power shortage / power surplus state and full renewable energy generation stage;

[0087] Based on the operating conditions of each section of the power grid, according to the existing stabilization and control action matching logic, the action imbalance is calculated according to the load fault and unit fault corresponding to the zero and full generation stages of wind power, and the production series wind imbalance, production series no-wind imbalance, isolated grid side thermal power wind imbalance and isolated grid side thermal power no-wind imbalance are obtained.

[0088] Specifically include:

[0089] 1. Power shortage and zero generation

[0090] (1) Limited by the capacity of electromagnetic connection transformer:

[0091]

[0092] (2) Powered directly by the line:

[0093]

[0094] At this time, it is easy to cause the rectifier unit on the isolated grid side to be overloaded, so the load should be adjusted:

[0095]

[0096] After completing the preliminary load distribution on the aluminum side, compare it with the thermal power supply capacity of the two power supply networks:

[0097]

[0098] The analysis of electricity purchase trends and increased electricity purchase indicators can be divided into the following situations:

[0099] (1) There is margin on both sides, but the power system is in a deficit state at this time, so this situation does not exist.

[0100] (2) There is surplus power on the plant side, but the grid side has insufficient power supply capacity:

[0101] Electricity purchasing trends:

[0102] Increase electricity purchases:

[0103] (3) There is a surplus on the grid side, but the power supply capacity on the plant side is insufficient. At this time, the load distribution on the isolated grid side is too much, and it is necessary to adjust so that the maximum output of the thermal power unit on the isolated grid side matches the load on the isolated grid side.

[0104] Electricity purchasing trends:

[0105] Increase electricity purchases:

[0106] (4) There is no margin on both sides. In this case, the load distribution on the isolated grid side is too much. Adjustment is required to make the maximum output of the thermal power units on the isolated grid side match the load on the isolated grid side, and transfer all the shortfalls to the grid side:

[0107] Electricity purchasing trends:

[0108] Increase electricity purchases:

[0109] This completes the analysis of the two indicators of electricity purchase trends and increased electricity purchases.

[0110] Based on the electricity purchase flow data, the analysis of load reduction and load increase can be divided into four situations:

[0111] (1) The power purchase flow is greater than the tie line demand and the power shortage is greater than the tie line demand

[0112] Load reduction:

[0113] Increase load shedding:

[0114] (2) The power purchase flow is not greater than the tie line demand and the power shortage is greater than the tie line demand

[0115] Load reduction:

[0116] Increase load shedding:

[0117] (3) The power purchase flow is greater than the tie line demand and the power shortage is greater than the tie line demand

[0118] Load reduction:

[0119] Increase load shedding:

[0120] (4) The power purchase flow is not greater than the tie line demand and the power shortage is not greater than the tie line demand

[0121] Load reduction:

[0122] Increase load shedding:

[0123] The impact on economic output refers to the situation where the large-capacity units with low coal consumption on the isolated grid side are unable to reach their maximum output due to the influence of the operating mode. The small-capacity units with high coal consumption on the grid side increase their output to maintain the power balance of the system. In this case, the increased output of the small-capacity units affects the economic output. In the case of power shortage, the economic output is affected:

[0124]

[0125] Surplus electricity affects economic output:

[0126] if hour:

[0127]

[0128] if hour:

[0129]

[0130] The adjustable capacity index of the isolated grid rectifier refers to the difference between the maximum capacity of the isolated grid side rectifier unit, the output limit of the isolated grid side thermal power unit, and a certain isolated grid side renewable energy. This difference indicates that after the maximum capacity of the isolated grid side rectifier unit reaches a certain capacity, it is meaningless to arrange more rectifier units on the isolated grid side. That is:

[0131] Here α represents the influence coefficient of the upper limit of new energy output.

[0132] 2. Power surplus and zero generation

[0133] (1) There is margin on both sides.

[0134] Electricity purchasing trends:

[0135] Increase electricity purchases:

[0136] Load reduction:

[0137] Increase load shedding:

[0138] (2) There is a surplus on the grid side. In this case, the grid side output can be increased to adjust the power balance, which will result in a decrease in economic efficiency:

[0139] Electricity purchasing trends:

[0140] Increase electricity purchases:

[0141] Load reduction:

[0142] Increase load shedding:

[0143] (3) There is a surplus on the plant power side. Since the plant power side has been allocated according to the maximum load, when there is a surplus on the plant power side, the grid power shortage is the amount of purchased electricity and the amount of increased purchased electricity:

[0144] Electricity purchasing trends:

[0145] Increase electricity purchases:

[0146] Load reduction:

[0147] Increase load shedding:

[0148] (4) There is no margin on both sides. This situation does not exist.

[0149] 3. Power shortage / surplus and full power generation stage

[0150] The abandoned renewable energy power indicator indicates that the full output of renewable energy is greater than the total peak load depth of thermal power units. The smaller the value, the better. Under normal circumstances, the abandoned renewable energy power should be equal under all available methods. However, due to the flow restrictions of certain lines in the grid structure, in special cases, it may be greater than the difference between the full output of renewable energy and the total peak load depth of thermal power. The value here only represents the normal value:

[0151]

[0152] In addition, there is also a grid-connected thermal power output lower limit difference indicator during the full power generation stage, which is used to represent the difference between the output of grid-connected thermal power units with poor economic efficiency and the output lower limit during the full power generation stage of new energy:

[0153]

[0154] 4. Stabilize the imbalance

[0155] According to the existing stabilization action matching logic, the action imbalance is calculated according to the load fault and unit fault corresponding to the wind power zero generation and full generation stages, and the production series wind imbalance is obtained. Production series of windless imbalance Unbalanced amount of wind power in thermal power plant on isolated grid side Unbalanced amount of thermal power without wind on the isolated grid side

[0156] Step 4: Use the superior-inferior solution distance method to sort all combinations and obtain the optimal operation mode.

[0157] The specific steps include:

[0158] (1) First, unify the indicator type of the analysis indicator matrix to obtain a positive matrix:

[0159] After obtaining the analysis results of all indicators, the operation mode of the selected rectifier units is evaluated using the distance optimization of the best and worst solutions (Topsis), and the indicator matrix X with n rows and m columns is obtained:

[0160]

[0161] (2) Then normalize the normalized matrix to eliminate the influence of the dimension of each indicator:

[0162] Forward X, where the optimal value of the indicator is close to zero, that is, the intermediate indicator is transformed into the maximum indicator: X = 1-abs(X-0) / max(X-max)

[0163] To standardize:

[0164] (3) Find the best and worst solutions among a limited number of solutions;

[0165] (4) Then, the distances between each evaluation object and the optimal and worst solutions are calculated respectively to obtain the relative closeness between each evaluation object and the optimal solution, and the values ​​of the decision variables for the operation mode that satisfies the constraints under the current combination and achieves the optimal safety and economy are given.

[0166] Normalize the forward matrix to find the best and worst solutions among the finite solutions;

[0167] Calculate the distance between the i-th index and the maximum value:

[0168] Calculate the distance between the i-th index and the minimum value:

[0169] Based on the relative closeness between each evaluation object and the optimal solution and the constraints satisfied under the current combination, the optimal solution is obtained. The optimal solution is the evaluation value The highest option.

[0170] Example 2

[0171] This embodiment provides an adaptive matching system for a rectifier unit with a heavy load and a high proportion of new energy, including:

[0172] Data acquisition module, used to obtain rectifier unit operation data;

[0173] The candidate combination screening module is used to screen out multiple candidate operation mode combinations based on the rectifier unit operation data, combined with the power output boundary and the load side capacity boundary;

[0174] The section analysis module is used to simulate the operation of each section of the power grid based on the power shortage / surplus and full or zero generation of renewable energy for each candidate combination, and analyze various indicators;

[0175] The adaptive matching module is used to determine the degree to which the operating mode of each candidate rectifier unit approaches the ideal indicator based on the analysis results of all indicators, and to determine the optimal combination based on the final evaluation value;

[0176] The decision generation module is used to transmit the optimal results back to provide decision support information.

[0177] Among them, in the candidate combination screening module, the multiple operation mode candidate combinations screened out by combining the power output boundary and the load side capacity boundary include:

[0178] According to the operating boundaries of the grid-related equipment, the power balance of the power grid is determined. Combined with the tie line limit, the basic condition is that the load adjustment range on both the isolated grid side and the grid side is greater than or equal to the output change of the power supply on the same side. That is, the load carried by the rectifier unit is greater than the maximum power supply capacity of the corresponding power supply side. Combined with the power limit of the production series, multiple unequal restriction relationships are formed. The enumeration method is used to eliminate all combinations that do not meet the restriction conditions to obtain the candidate operation mode combination.

[0179] Example 3

[0180] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the steps of the adaptive matching method for a rectifier unit with a heavy load and a high proportion of new energy are implemented as described above.

[0181] Example 4

[0182] This embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the adaptive matching method for a rectifier unit with a heavy load and a high proportion of new energy are implemented as described above.

[0183] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0184] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0185] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0186] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0187] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0188] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An adaptive matching method for rectifier units with heavy loads and high proportions of new energy, characterized in that: The steps include: Obtain rectifier unit operating data; Based on the rectifier unit operating data, combined with the power output boundary and the load side capacity boundary, multiple operating mode combinations are screened out; For each candidate combination, the operation status of each section of the power grid is simulated based on the power shortage / surplus and full / zero generation of renewable energy, and various indicators are analyzed; Based on the analysis results of all indicators, the superior and inferior solution distance optimization method is used to determine the degree to which the operating mode of each candidate rectifier unit approaches the ideal indicator, and the optimal combination is obtained based on the final evaluation value; The optimal results are fed back to provide decision support information.

2. The adaptive matching method for rectifier units for heavy-load and high-proportion new energy according to claim 1, characterized in that: The combination of the power output boundary and the load side capacity boundary to select multiple operating mode combinations includes: According to the operating boundaries of grid-related equipment, the power balance of the power grid is determined. Combined with the tie-line limit, the basic condition is that the load adjustment range of both the isolated grid side and the grid-connected side is greater than or equal to the output change of the power supply on the same side. Combined with the power limit of the production series, multiple unequal restriction relationships are formed. The enumeration method is used to eliminate all combinations that do not meet the restriction conditions to obtain the candidate operation mode combination.

3. The adaptive matching method for rectifier units with heavy load and high proportion of new energy as claimed in claim 2, characterized in that: When the tie line limit When there is a power shortage in the system, electricity will be purchased within the limit of the interconnection line to make up for the shortfall. When the shortage exceeds the limit of the interconnection line, the power consumption side will reduce the load to cooperate with the adjustment.

4. The adaptive matching method for rectifier units for heavy-load and high-proportion new energy according to claim 2, characterized in that: The power limits of the production series are combined to form multiple unequal limit relationships, and all combinations that do not meet the limit conditions are eliminated by enumeration to obtain the following combinations of operation modes: In the power shortage state, the corresponding screening conditions are obtained according to the size of the power gap, including: When the shortfall amount ≥ wind power supply + tie line limit, the first screening condition is obtained; When the shortfall is less than the wind power supply + tie line limit, the second screening condition is obtained; When the shortage amount ≥ wind power supply and wind power supply ≥ tie line limit, the third screening condition is obtained; When the tie line limit value ≥ the shortfall amount and the shortfall amount ≥ the wind power supply, the fourth screening condition is obtained; When wind power supply ≥ shortage amount and shortage amount ≥ tie line limit, the fifth screening condition is obtained; When the tie line limit value ≥ the shortfall value and the wind power supply value ≥ the tie line limit value, the sixth screening condition is obtained; In the state of surplus power, the corresponding screening conditions are obtained based on the maximum and minimum power supply of the networked thermal power: When the power surplus is greater than the maximum power supply of the networked thermal power plant - the minimum power supply of the networked thermal power plant, the seventh screening condition is obtained; When the power surplus is ≤ the maximum power supply of the networked thermal power plant - the minimum power supply of the networked thermal power plant, the eighth screening condition is obtained.

5. The adaptive matching method for rectifier units for heavy-load and high-proportion new energy according to claim 1, characterized in that: For each candidate combination, the operation status of each section of the power grid is simulated based on the power shortage / surplus and the full and zero generation of renewable energy, and various indicators are analyzed, including: The operation status of each section of the power grid is simulated for the power shortage state and zero renewable energy generation stage, the power surplus state and zero renewable energy generation stage, and the power shortage / power surplus state and full renewable energy generation stage; Based on the operating conditions of each section of the power grid, according to the existing stabilization and control action matching logic, the action imbalance is calculated according to the load fault and unit fault corresponding to the zero and full generation stages of wind power, and the production series wind imbalance, production series no-wind imbalance, isolated grid side thermal power wind imbalance and isolated grid side thermal power no-wind imbalance are obtained.

6. The adaptive matching method for rectifier units for heavy-load and high-proportion new energy according to claim 1, characterized in that: The above-mentioned method of optimizing the distance between superior and inferior solutions is used to judge the degree to which the operation mode of each candidate rectifier unit approaches the ideal index, and the optimal combination is obtained based on the final evaluation value, including: Analyze the indicator matrix and unify the indicator types to obtain a positive matrix; Normalize the forward matrix to find the best and worst solutions among the finite solutions; Calculate the distance between each evaluation object and the optimal solution and the worst solution respectively, and obtain the relative closeness between each evaluation object and the optimal solution; Based on the relative closeness of each evaluation object to the optimal solution and the constraints satisfied under the current combination, the optimal solution is obtained. The optimal solution is the solution with the highest evaluation value.

7. Adaptive matching system for rectifier units with heavy load and high proportion of new energy, characterized by: include: Data acquisition module, used to obtain rectifier unit operation data; The candidate combination screening module is used to screen out multiple candidate operation mode combinations based on the rectifier unit operation data, combined with the power output boundary and the load side capacity boundary; The section analysis module is used to simulate the operation of each section of the power grid based on the power shortage / surplus and full or zero generation of renewable energy for each candidate combination, and analyze various indicators; The adaptive matching module is used to determine the degree to which the operating mode of each candidate rectifier unit approaches the ideal indicator based on the analysis results of all indicators, and to determine the optimal combination based on the final evaluation value; The decision generation module is used to transmit the optimal results back to provide decision support information.

8. The adaptive matching system for rectifier units with heavy load and high proportion of new energy as claimed in claim 7, characterized in that: In the candidate combination screening module, the multiple operation mode candidate combinations are screened out by combining the power output boundary and the load side capacity boundary, including: According to the operating boundaries of the grid-related equipment, the power balance of the power grid is determined. Combined with the tie line limit, the basic condition is that the load adjustment range on both the isolated grid side and the grid side is greater than or equal to the output change of the power supply on the same side. That is, the load carried by the rectifier unit is greater than the maximum power supply capacity of the corresponding power supply side. Combined with the power limit of the production series, multiple unequal restriction relationships are formed. The enumeration method is used to eliminate all combinations that do not meet the restriction conditions to obtain the candidate operation mode combination.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the adaptive matching method for a rectifier unit with heavy load and high proportion of new energy are implemented as described in any one of claims 1 to 6.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the adaptive matching method for a rectifier unit with heavy load and high proportion of new energy are implemented as described in any one of claims 1-6.

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