System and method for determining capacity of high-voltage shunt reactor

Abstract

The invention belongs to the technical field of power equipment, and provides a high-voltage shunt reactor capacity determination system and method, and the method comprises the steps: carrying out the simulation analysis of a power system, obtaining the capacity range of a high-voltage shunt reactor of the power system under different working conditions and different target demands, and carrying out the intersection analysis, determining the capacity range of the high-voltage shunt reactor under the corresponding working condition based on the determined signal, carrying out distance analysis, determining the optimal capacity of the high-voltage shunt reactor under the corresponding working condition, obtaining the operation historical data of the power system under the corresponding working condition based on the to-be-determined signal, and carrying out analysis to obtain the optimal capacity of the high-voltage shunt reactor under the corresponding working condition. According to the method, the capacity range of the high-voltage shunt reactor can be dynamically adjusted so as to adapt to real-time changes of a power system, and resource design and distribution of the power system are more reasonable.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power equipment, and in particular relates to a system and method for determining the capacity of a high-voltage shunt reactor. Background Art

[0002] As a compensation device, the shunt reactor can effectively compensate for the capacitive charging power of the line, limit the increase of the power frequency voltage, and ensure the stability and safety of the power system. However, how to accurately determine the capacity of the shunt reactor to ensure that it can effectively suppress overvoltage without causing unnecessary energy waste and equipment loss is a problem that needs to be solved urgently.

[0003] In the prior art, the capacity of the high-voltage shunt reactor is determined by analyzing the overvoltage of the power system line. The problems are: first, determining the capacity of the high-voltage shunt reactor based solely on the overvoltage analysis lacks comprehensiveness. In the power system, the capacity of the high-voltage shunt reactor not only affects the overvoltage of the line, but also affects factors such as the latent current and reactive power. Analyzing and determining the capacity of the high-voltage shunt reactor based solely on the overvoltage cannot guarantee that the determined capacity of the high-voltage shunt reactor can meet the overall operation of the power system. Second, the power system has different demands under different load conditions and there are real-time changes. If the capacity of the high-voltage shunt reactor cannot be dynamically determined and adjusted according to the operating conditions, the stable operation of the power system under multiple operating conditions cannot be guaranteed.

[0004] To this end, the present invention provides a system and method for determining the capacity of a high-voltage shunt reactor. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, the problem proposed in the background technology that the capacity of the high-voltage shunt reactor is determined solely from the analysis of overvoltage, lacks comprehensiveness, and lacks the ability to dynamically adjust the capacity of the high-voltage shunt reactor according to the working conditions is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a method for determining the capacity of a high-voltage shunt reactor, comprising: Performing simulation analysis on the power system to obtain the capacity range of the high-voltage shunt reactor of the power system under different working conditions and different target requirements, and performing intersection analysis on the capacity range of the high-voltage shunt reactor under different working conditions and different target requirements to obtain an operation signal, wherein the operation signal includes a determined signal and a signal to be determined; Based on the determination signal, determine the capacity range of the high-voltage shunt reactor under the corresponding working condition, and perform distance analysis on the capacity range of the high-voltage shunt reactor under the corresponding working condition to determine the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; Based on the signal to be determined, the operating history data of the power system under the corresponding working conditions is obtained, and based on the analysis of the operating history data, the priority coefficients of different target demands under the corresponding working conditions are obtained. According to the priority coefficients of different target demands, the capacity range and optimal capacity of the high-voltage shunt reactor under the corresponding working conditions are determined.

[0007] As a further technical solution of the present invention, the operation signal is obtained in the following manner: Obtain the capacity range of high-voltage shunt reactors that need to meet the secondary current limit under the same working conditions, and integrate the capacity range intervals into a set A; Obtain the capacity range of high-voltage shunt reactors that need to meet voltage fluctuations under the same working conditions, and integrate the capacity range intervals into set B; Obtain the capacity range of high-voltage shunt reactors that need to meet reactive power balance under the same working conditions, and integrate the capacity range intervals into a set C; If in the sets A, B and C, there exists A∩B∩C, then a determination signal is generated; If A∩B∩C does not exist in the sets A, B, and C, a pending signal is generated.

[0008] As a further technical solution of the present invention, based on the determination signal, the capacity range of the high-voltage shunt reactor under the corresponding working condition is determined, specifically: The operating condition type for generating a determination signal is obtained, and the intersection set D obtained by processing the generated determination signal under the operating condition type is used as the capacity range of the high-voltage shunt reactor under the determined corresponding operating condition, wherein D=A∩B∩C.

[0009] As a further technical solution of the present invention, a distance analysis is performed on the capacity range of the high-voltage shunt reactor under the corresponding working condition to determine the optimal capacity of the high-voltage shunt reactor under the corresponding working condition, including: If there is only one element in the intersection set D, the only remaining element is used as the optimal capacity of the high-voltage shunt reactor under the corresponding operating condition type; If the number of elements S in the intersection set D is greater than 1, then the optimal capacity of the high-voltage shunt reactor corresponding to the corresponding different target requirements is found in the sets A, B and C respectively, including: the optimal capacity AJ of the high-voltage shunt reactor that meets the potential current limit in the set A, the optimal capacity BJ of the high-voltage shunt reactor that meets the voltage fluctuation in the set B, and the optimal capacity CJ of the high-voltage shunt reactor that meets the reactive power balance in the set C; Assume that the optimal capacity of the high-voltage shunt reactor under the corresponding operating condition type is ZJ, where ZJ is in the intersection set D; For each element X in the intersection set D, calculate the sum of its distances from AJ, BJ, and CJ: D(X)=∣X−AJ∣+∣X−BJ∣+∣X−CJ∣; Traverse the intersection set D and find the X value that minimizes D(X), which is the optimal capacity ZJ of the high-voltage shunt reactor under the corresponding operating condition.

[0010] As a further technical solution of the present invention, the priority coefficient is obtained in the following manner: Compare the voltage, the secondary supply current and the reactive power in the previous operation cycle with the standard limit range of voltage, the standard limit range of secondary supply current and the standard limit range of reactive power respectively; If the voltage exceeds the voltage standard limit range, a voltage abnormality signal is generated; If the submersible current exceeds the submersible current standard limit range, a submersible current abnormal signal is generated; If the reactive power exceeds the reactive power standard limit range, a reactive power abnormal signal is generated; Based on the analysis of abnormal voltage signals, abnormal sub-supply current signals and abnormal reactive power signals, the priority coefficient of the voltage fluctuation target demand, the priority coefficient of the sub-supply current limitation target demand and the priority coefficient of the reactive power balance target demand are obtained, wherein the priority coefficient of the sub-supply current limitation target demand and the priority coefficient of the reactive power balance target demand are obtained in the same way as the priority coefficient of the voltage fluctuation target demand.

[0011] As a further technical solution of the present invention, the priority coefficient of the voltage fluctuation target demand is obtained in the following manner: Count the total number of abnormal voltage signals, abnormal secondary current signals and abnormal reactive power signals in the previous operation cycle, and mark them as the total number of abnormalities; The number of times the voltage abnormality signal appears in the previous operation cycle is processed by ratio processing with the total number of abnormalities to obtain the voltage abnormality number ratio; Obtain the time when the voltage abnormality signal occurs each time, and sum and average them to obtain the mean value of the voltage abnormality duration, and perform ratio processing on the mean value of the voltage abnormality duration and the duration corresponding to the previous operation cycle to obtain the voltage abnormality time ratio; Mark the period in which the voltage abnormality signal continuously appears as the voltage abnormality period, obtain all voltage values ​​in the voltage abnormality period, and sum and average them to obtain the voltage mean value in the voltage abnormality period, perform difference processing on the voltage mean value and the nearest adjacent voltage standard limit range endpoint value, and take the absolute value of the difference to obtain the voltage deviation, perform ratio processing on the voltage deviation and the nearest adjacent voltage standard limit range endpoint value to obtain the voltage over-limit ratio, obtain the voltage over-limit ratio in all voltage abnormality periods, and obtain the voltage abnormality degree ratio; The voltage anomaly frequency ratio, voltage anomaly time ratio and voltage anomaly degree ratio are summed to obtain the priority coefficient of the voltage fluctuation target demand.

[0012] As a further technical solution of the present invention, the capacity range and the optimal capacity of the high-voltage shunt reactor under the corresponding working conditions are determined according to the priority coefficients of different target requirements, including: Based on generating the signal to be determined, if there is no intersection between the sets A, B and C, generating a first analysis signal; If any two of the sets A, B and C intersect, a second analysis signal is generated; Based on the first analysis signal, the capacity range of the high-voltage parallel reactor corresponding to the target demand with the largest priority coefficient is selected as the capacity range of the high-voltage parallel reactor under the corresponding working condition, and the optimal capacity within the capacity range of the high-voltage parallel reactor corresponding to the target demand is used as the optimal capacity of the high-voltage parallel reactor under the corresponding working condition.

[0013] As a further technical solution of the present invention, based on the second analysis signal, the target demand types corresponding to the two intersecting sets are obtained, and the priority coefficients of the target demands are summed to obtain the total priority coefficients of the target demands corresponding to the two intersecting sets, and the total priority coefficients are marked as the intersecting priority coefficients, and the priority coefficients of the target demands corresponding to the other non-intersecting set are marked as the non-intersecting priority coefficients, and the intersecting priority total coefficients are compared with the non-intersecting priority coefficients; If the total coefficient of the intersecting priority is greater than the coefficient of the unintersecting priority, the intersection H of the two intersecting sets is obtained, and it is used as the capacity range of the high-voltage shunt reactor under the corresponding working condition. At the same time, the optimal capacities of the high-voltage shunt reactors corresponding to the target demands of the two intersecting sets are obtained respectively, and they are marked as the first capacity and the second capacity; the priority coefficients of the target demands corresponding to the two intersecting sets are obtained, and they are ratio-processed to obtain the priority coefficient ratio of the two target demands; Traverse the elements in the intersection H, find an element in the intersection H such that the ratio of the distance of the element to the first capacity point and the distance to the second capacity point is equal to the priority coefficient ratio, and use the found element as the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; If an element cannot be found in the intersection H such that the ratio of the distance of the element to the first capacity point to the distance to the second capacity point is equal to the priority coefficient ratio, then an element in the intersection H whose ratio of the distance to the first capacity point to the distance to the second capacity point is closer to the priority coefficient ratio is selected as the optimal capacity of the high-voltage shunt reactor under the corresponding operating conditions.

[0014] As a further technical solution of the present invention, the total coefficient of intersection priority is compared with the coefficient of non-intersection priority; If the total coefficient of the intersection priority is less than the non-intersecting priority coefficient, the same as the first analysis signal, the capacity range of the high-voltage shunt reactor of the target demand corresponding to the non-intersecting priority coefficient is selected as the capacity range of the high-voltage shunt reactor under the corresponding working condition, and the optimal capacity within the capacity range of the high-voltage shunt reactor of the corresponding target demand is used as the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; If the total coefficient of the intersecting priority is equal to the non-intersecting priority coefficient, then the capacity range of the high-voltage shunt reactor of the target demand corresponding to its non-intersecting priority coefficient or the intersection H corresponding to the total coefficient of the intersecting priority can be selected as the capacity range of the high-voltage shunt reactor under the corresponding working condition. The optimal capacity of the high-voltage shunt reactor under the corresponding working condition is determined according to the capacity range of the high-voltage shunt reactor under the corresponding working condition.

[0015] A high-voltage shunt reactor capacity determination system, comprising: Operation processing module: simulate and analyze the power system to obtain the capacity range of the high-voltage shunt reactor of the power system under different working conditions and different target requirements, and obtain the operation signal based on the intersection analysis of the capacity range of the high-voltage shunt reactor under different working conditions and different target requirements, wherein the operation signal includes a determined signal and a signal to be determined; The first determination module: determines the capacity range of the high-voltage shunt reactor under the corresponding working condition based on the determination signal, and performs distance analysis on the capacity range of the high-voltage shunt reactor under the corresponding working condition to determine the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; The second determination module: based on the signal to be determined, obtain the operation history data of the power system under the corresponding working conditions, and based on the analysis of the operation history data, obtain the priority coefficients of different target demands under the corresponding working conditions, and determine the capacity range and optimal capacity of the high-voltage shunt reactor under the corresponding working conditions according to the priority coefficients of different target demands.

[0016] The beneficial effects of the present invention are as follows: a simulation analysis is performed on the power system to obtain the capacity range of the high-voltage parallel reactor of the power system under different working conditions and different target demands, and an operation signal is obtained based on an intersection analysis of the capacity range of the high-voltage parallel reactor under different working conditions and different target demands, wherein the operation signal includes a determined signal and a signal to be determined, and based on the determined signal, the capacity range of the high-voltage parallel reactor under the corresponding working condition is determined, and a distance analysis is performed on the capacity range of the high-voltage parallel reactor under the corresponding working condition to determine the optimal capacity of the high-voltage parallel reactor under the corresponding working condition, and based on the signal to be determined, the operation history data of the power system under the corresponding working condition is obtained, and based on the analysis of the operation history data, the priority coefficients of different target demands under the corresponding working condition are obtained, and the capacity range and the optimal capacity of the high-voltage parallel reactor under the corresponding working condition are determined according to the priority coefficients of different target demands. The embodiment of the present invention first determines the capacity range of the high-voltage parallel reactor under the same working condition and under different target demands through the simulation operation of the power system, and performs an intersection analysis to obtain a determined Signal and signal to be determined, based on the determined signal, determine the capacity range and optimal capacity of the high-voltage parallel reactor under the corresponding working condition according to the intersection result, based on the signal to be determined, determine the capacity range and optimal capacity of the high-voltage parallel reactor under the corresponding working condition according to the priority coefficient that can reflect the influence of the target demand. The present invention is firstly conducive to finding a common feasible area of ​​the capacity of the high-voltage parallel reactor, thereby avoiding excessive or insufficient allocation of resources, which helps to achieve a balance between the economy and reliability of the power system. Secondly, for different working conditions and target demands, the present invention can dynamically adjust the capacity range of the high-voltage parallel reactor to adapt to the real-time changes of the power system. Then, by analyzing the operating history data of the power system, the priority coefficients of different target demands are extracted, and the capacity range and optimal capacity of the high-voltage parallel reactor under the corresponding working condition are determined according to the priority coefficient, so that its resource design allocation is more reasonable. Finally, the present invention analyzes the multi-objective demands of its power system to determine the capacity range and optimal capacity of the high-voltage parallel reactor, and its analysis is more comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 is a flowchart of the steps of a method for determining the capacity of a high-voltage shunt reactor according to Embodiment 1 of the present invention; Figure 2 It is a flowchart of a high-voltage shunt reactor capacity determination system described in Example 2 of the present invention. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Example 1

[0020] like Figure 1 As shown, a method for determining the capacity of a high-voltage shunt reactor according to an embodiment of the present invention includes: Step 1: Simulate and analyze the power system to obtain the capacity range of the high-voltage shunt reactor of the power system under different working conditions and different target requirements, and obtain the operation signal based on the intersection analysis of the capacity range of the high-voltage shunt reactor under different working conditions and different target requirements, wherein the operation signal includes a determined signal and a signal to be determined; Among them, the types of different operating conditions include: peak operation period, stable operation period and low-peak operation period of the power system; Different target requirements include sub-supply current limitation, voltage fluctuation and reactive power balance; In some embodiments, an operation simulation model of the power system is established by PSASP, PSS / E or DigSILENT power system simulation software, which includes but is not limited to transmission lines, generators, transformers, loads, and shunt reactors; The simulation analysis process specifically includes: S1, in the operation simulation model of the power system, setting simulation operation parameters according to the actual operation parameters of the power system under different working conditions, including but not limited to system voltage, power, etc.; S2, according to the operation simulation of the power system, obtain the capacity range of the high-voltage shunt reactor that needs to meet the requirement of the submerged current limitation under different working conditions, including: the capacity range of the high-voltage shunt reactor that needs to meet the submerged current limitation during the peak operation period, the capacity range of the high-voltage shunt reactor that needs to meet the submerged current limitation during the stable operation period, and the capacity range of the high-voltage shunt reactor that needs to meet the submerged current limitation during the low-peak operation period; S3, according to the operation simulation of the power system, obtain the capacity range of the high-voltage shunt reactor that needs to meet the voltage fluctuation requirements under different working conditions, including: the capacity range of the high-voltage shunt reactor that needs to meet the voltage fluctuation requirements during the peak operation period, the capacity range of the high-voltage shunt reactor that needs to meet the voltage fluctuation requirements during the stable operation period, and the capacity range of the high-voltage shunt reactor that needs to meet the voltage fluctuation requirements during the low-peak operation period; S4, according to the operation simulation of the power system, obtain the capacity range of the high-voltage shunt reactor that needs to meet the reactive power balance demand under different working conditions, including: the capacity range of the high-voltage shunt reactor that needs to meet the reactive power balance during the peak operation period, the capacity range of the high-voltage shunt reactor that needs to meet the reactive power balance during the stable operation period, and the capacity range of the high-voltage shunt reactor that needs to meet the reactive power balance during the low-peak operation period; The intersection analysis of the capacity range of high-voltage shunt reactors under different target requirements under the same working conditions is as follows: Obtain the capacity range of high-voltage shunt reactors that need to meet the secondary current limit under the same working conditions, and integrate the capacity range intervals into a set A; Obtain the capacity range of high-voltage shunt reactors that need to meet voltage fluctuations under the same working conditions, and integrate the capacity range intervals into set B; Obtain the capacity range of high-voltage shunt reactors that need to meet reactive power balance under the same working conditions, and integrate the capacity range intervals into a set C; It should be noted that the working conditions corresponding to sets A, B, and C are the same; If in the sets A, B and C, there exists A∩B∩C, then a determination signal is generated; If A∩B∩C does not exist in the sets A, B, and C, a signal to be determined is generated; It should be noted that the determination signal indicates that: under the same operating conditions, there is a high-voltage shunt reactor capacity range or capacity that can meet different target requirements; Step 2: Based on the determination signal, determine the capacity range of the high-voltage shunt reactor under the corresponding working condition, and perform distance analysis on the capacity range of the high-voltage shunt reactor under the corresponding working condition to determine the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; Specifically, the operating condition type for generating the determination signal is obtained, and the intersection set D obtained by processing the generated determination signal under the operating condition type is used as the capacity range of the high-voltage shunt reactor under the determined corresponding operating condition, wherein D=A∩B∩C; If there is only one element in the intersection set D, the only remaining element is used as the optimal capacity of the high-voltage shunt reactor under the corresponding operating condition type; If the number of elements S in the intersection set D is greater than 1, then find the optimal capacity of the high-voltage shunt reactor corresponding to the corresponding target requirements in the sets A, B, and C respectively, and perform distance analysis between them and the elements in the intersection set D to determine the optimal capacity of the high-voltage shunt reactor under the corresponding operating condition type; Specifically, the optimal capacity of the high-voltage shunt reactor that meets the potential current limit in set A is obtained and marked as AJ; the optimal capacity of the high-voltage shunt reactor that meets the voltage fluctuation in set B is obtained and marked as BJ; the optimal capacity of the high-voltage shunt reactor that meets the reactive power balance in set C is obtained and marked as CJ; It should be noted that the optimal capacity of the high-voltage shunt reactors in sets A, B, and C is the capacity that can meet the corresponding target demand to the greatest extent within its capacity range; Assume that the optimal capacity of the high-voltage shunt reactor under the corresponding operating condition type is ZJ, where ZJ is in the intersection set D; For each element X in the intersection set D, calculate the sum of its distances from AJ, BJ, and CJ: D(X)=∣X−AJ∣+∣X−BJ∣+∣X−CJ∣; Traverse the intersection set D and find the value of X that minimizes D(X), which is the optimal capacity ZJ of the high-voltage shunt reactor under the corresponding operating condition; It should be noted that the optimal capacity of the high-voltage shunt reactor under the corresponding working condition type is found through distance analysis. Its significance lies in that the interval of its intersection set D is the capacity range of the high-voltage shunt reactor under the corresponding working condition type determined by it. An element point closest to the optimal capacities AJ, BJ and CJ of the high-voltage shunt reactor that meets different requirements is found in D as the optimal capacity of the high-voltage shunt reactor under the corresponding working condition type, which not only meets different requirements, but also ideally and maximally meets different requirements under the corresponding working condition type. Step 3: Based on the signal to be determined, obtain the operation history data of the power system under the corresponding working condition, analyze the operation history data, obtain the priority coefficients of different target demands under the corresponding working condition, and determine the capacity range and optimal capacity of the high-voltage shunt reactor under the corresponding working condition according to the priority coefficients of different target demands; The operation history data includes the voltage, potential supply current and reactive power of the power system in previous operation cycles; In some embodiments, the voltage, the latent current and the reactive power in the previous operation cycle are compared with the voltage standard limit range, the latent current standard limit range and the reactive power standard limit range respectively; If the voltage exceeds the voltage standard limit range, a voltage abnormality signal is generated; If the submersible current exceeds the submersible current standard limit range, a submersible current abnormal signal is generated; If the reactive power exceeds the reactive power standard limit range, a reactive power abnormal signal is generated; Count the total number of abnormal voltage signals, abnormal secondary current signals and abnormal reactive power signals in the previous operation cycle, and mark them as the total number of abnormalities; The number of times the voltage abnormality signal appears in the previous operation cycle is processed by ratio processing with the total number of abnormalities to obtain the voltage abnormality number ratio; Obtain the time when the voltage abnormality signal occurs each time, and sum and average them to obtain the mean value of the voltage abnormality duration, and perform ratio processing on the mean value of the voltage abnormality duration and the duration corresponding to the previous operation cycle to obtain the voltage abnormality time ratio; Mark the period in which the voltage abnormality signal continuously appears as the voltage abnormality period, obtain all voltage values ​​in the voltage abnormality period, and sum and average them to obtain the voltage mean value in the voltage abnormality period, perform difference processing on the voltage mean value and the nearest adjacent voltage standard limit range endpoint value, and take the absolute value of the difference to obtain the voltage deviation, perform ratio processing on the voltage deviation and the nearest adjacent voltage standard limit range endpoint value to obtain the voltage over-limit ratio, obtain the voltage over-limit ratio in all voltage abnormality periods, and obtain the voltage abnormality degree ratio; The voltage abnormality frequency ratio, voltage abnormality time ratio and voltage abnormality degree ratio are summed to obtain the priority coefficient of the voltage fluctuation target demand; The priority coefficient of the target demand for voltage fluctuation is obtained in the same way as that of the target demand for voltage fluctuation. The priority coefficient of the target demand for current limitation is obtained by the ratio of the number of abnormal times of the target demand for current fluctuation, the ratio of the abnormal time of the target demand for current fluctuation and the ratio of the abnormal degree of the target demand for current fluctuation. Similarly, the priority coefficient of the target demand for reactive power balance is obtained. Based on generating the signal to be determined, if there is no intersection between the sets A, B and C, generating a first analysis signal; If any two of the sets A, B and C intersect, a second analysis signal is generated; Based on the first analysis signal, the capacity range of the high-voltage shunt reactor of the target demand corresponding to the largest priority coefficient is selected as the capacity range of the high-voltage shunt reactor under the corresponding working condition, and the optimal capacity within the capacity range of the high-voltage shunt reactor corresponding to the target demand is used as the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; It should be noted that the purpose of determining the capacity range and optimal capacity of the high-voltage shunt reactor under the corresponding working conditions according to the priority coefficient is that the priority coefficient reflects the abnormal performance value of different target demands in the previous power system operation cycle. The larger the priority coefficient, the more serious the abnormality, which means that the impact on the power system is greater. When determining the capacity of the high-voltage shunt reactor, it needs to be considered and satisfied first; Based on the second analysis signal, the target demand types corresponding to the two intersecting sets are obtained, and the priority coefficients of the target demands are summed to obtain the total priority coefficients of the target demands corresponding to the two intersecting sets, and the total priority coefficients are marked as the intersecting priority coefficients, and the priority coefficients of the target demands corresponding to the other non-intersecting set are marked as the non-intersecting priority coefficients, and the intersecting priority total coefficients are compared with the non-intersecting priority coefficients; If the total coefficient of the intersecting priority is greater than the coefficient of the unintersecting priority, the intersection H of the two intersecting sets is obtained, and it is used as the capacity range of the high-voltage shunt reactor under the corresponding working condition. At the same time, the optimal capacities of the high-voltage shunt reactors corresponding to the target demands of the two intersecting sets are obtained respectively, and they are marked as the first capacity and the second capacity; the priority coefficients of the target demands corresponding to the two intersecting sets are obtained, and they are ratio-processed to obtain the priority coefficient ratio of the two target demands; Traverse the elements in the intersection H, find an element in the intersection H such that the ratio of the distance of the element to the first capacity point and the distance to the second capacity point is equal to the priority coefficient ratio, and use the found element as the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; If an element cannot be found in the intersection H such that the ratio of the distance of the element to the first capacity point to the distance of the element to the second capacity point is equal to the priority coefficient ratio, then an element in the intersection H whose ratio of the distance of the element to the first capacity point to the distance of the element to the second capacity point is closer to the priority coefficient ratio is selected as the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; It should be noted that the priority coefficients of the intersecting target demands are superimposed and compared with the priority coefficients of the non-intersecting target demands. The capacity range of the high-voltage shunt reactor is determined by comparing the priority coefficients and the optimal capacity is determined according to the priority coefficient ratio of the intersecting target demands, so as to achieve maximum satisfaction while meeting the target demands that need to be met first. If the total coefficient of the intersection priority is less than the non-intersecting priority coefficient, the same as the first analysis signal, the capacity range of the high-voltage shunt reactor of the target demand corresponding to the non-intersecting priority coefficient is selected as the capacity range of the high-voltage shunt reactor under the corresponding working condition, and the optimal capacity within the capacity range of the high-voltage shunt reactor of the corresponding target demand is used as the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; If the total coefficient of intersection priority is equal to the non-intersecting priority coefficient, then the capacity range of the high-voltage shunt reactor of the target demand corresponding to the non-intersecting priority coefficient or the intersection H corresponding to the total coefficient of intersection priority can be selected as the capacity range of the high-voltage shunt reactor under the corresponding working condition, and the optimal capacity of the high-voltage shunt reactor under the corresponding working condition is determined according to the capacity range of the high-voltage shunt reactor under the corresponding working condition; the determination method is the same as above, and will not be repeated here; The technical solution of the embodiment of the present invention is: simulate and analyze the power system to obtain the capacity range of the high-voltage shunt reactor of the power system under different working conditions and different target demands, and obtain the operation signal based on the intersection analysis of the capacity range of the high-voltage shunt reactor under different working conditions and different target demands, wherein the operation signal includes a determined signal and a signal to be determined, and based on the determined signal, determine the capacity range of the high-voltage shunt reactor under the corresponding working condition, and perform distance analysis on the capacity range of the high-voltage shunt reactor under the corresponding working condition to determine the optimal capacity of the high-voltage shunt reactor under the corresponding working condition, and based on the signal to be determined, obtain the operation history data of the power system under the corresponding working condition, and obtain the priority coefficients of different target demands under the corresponding working condition based on the analysis of the operation history data, and determine the capacity range and optimal capacity of the high-voltage shunt reactor under the corresponding working condition according to the priority coefficients of different target demands. The embodiment of the present invention first determines the capacity range of the high-voltage shunt reactor under the same working condition and different target demands through the simulation operation of the power system. The capacity range of the high-voltage parallel reactor under the demand is determined, and an intersection analysis is performed to obtain a determined signal and a signal to be determined. Based on the determined signal, the capacity range of the high-voltage parallel reactor under the corresponding working condition and the optimal capacity are determined according to the intersection result. Based on the signal to be determined, the capacity range of the high-voltage parallel reactor under the corresponding working condition and the optimal capacity are determined according to the priority coefficient that can reflect the influence of the target demand. The present invention is firstly conducive to finding a common feasible area of ​​the capacity of the high-voltage parallel reactor, thereby avoiding excessive or insufficient allocation of resources, which helps to achieve a balance between the economy and reliability of the power system. Secondly, for different working conditions and target demands, the present invention can dynamically adjust the capacity range of the high-voltage parallel reactor to adapt to the real-time changes of the power system. Then, by analyzing the historical operation data of the power system, the priority coefficients of different target demands are extracted, and the capacity range of the high-voltage parallel reactor under the corresponding working condition and the optimal capacity are determined according to the priority coefficient, so that the resource design and allocation are more reasonable. Example 2

[0021] like Figure 2 As shown, based on Example 1, a system for determining the capacity of a high-voltage shunt reactor according to an embodiment of the present invention includes: Operation processing module: simulate and analyze the power system to obtain the capacity range of the high-voltage shunt reactor of the power system under different working conditions and different target requirements, and obtain the operation signal based on the intersection analysis of the capacity range of the high-voltage shunt reactor under different working conditions and different target requirements, wherein the operation signal includes a determined signal and a signal to be determined; The first determination module: determines the capacity range of the high-voltage shunt reactor under the corresponding working condition based on the determination signal, and performs distance analysis on the capacity range of the high-voltage shunt reactor under the corresponding working condition to determine the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; The second determination module: based on the signal to be determined, obtain the operation history data of the power system under the corresponding working conditions, and based on the analysis of the operation history data, obtain the priority coefficients of different target demands under the corresponding working conditions, and determine the capacity range and optimal capacity of the high-voltage shunt reactor under the corresponding working conditions according to the priority coefficients of different target demands.

[0022] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for determining the capacity of a high-voltage shunt reactor, characterized in that: include: Performing simulation analysis on the power system to obtain the capacity range of the high-voltage shunt reactor of the power system under different working conditions and different target requirements, and performing intersection analysis on the capacity range of the high-voltage shunt reactor under different working conditions and different target requirements to obtain an operation signal, wherein the operation signal includes a determined signal and a signal to be determined; Based on the determination signal, determine the capacity range of the high-voltage shunt reactor under the corresponding working condition, and perform distance analysis on the capacity range of the high-voltage shunt reactor under the corresponding working condition to determine the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; Based on the signal to be determined, the operating history data of the power system under the corresponding working conditions is obtained, and based on the analysis of the operating history data, the priority coefficients of different target demands under the corresponding working conditions are obtained. According to the priority coefficients of different target demands, the capacity range and optimal capacity of the high-voltage shunt reactor under the corresponding working conditions are determined.

2. A method for determining the capacity of a high-voltage shunt reactor according to claim 1, characterized in that: The operation signal is obtained in the following manner: Obtain the capacity range of high-voltage shunt reactors that need to meet the secondary current limit under the same working conditions, and integrate the capacity range intervals into a set A; Obtain the capacity range of high-voltage shunt reactors that need to meet voltage fluctuations under the same working conditions, and integrate the capacity range intervals into set B; Obtain the capacity range of high-voltage shunt reactors that need to meet reactive power balance under the same working conditions, and integrate the capacity range intervals into a set C; If in the sets A, B and C, there exists A∩B∩C, then a determination signal is generated; If A∩B∩C does not exist in the sets A, B, and C, a pending signal is generated.

3. A method for determining the capacity of a high-voltage shunt reactor according to claim 1, characterized in that: Based on the determination signal, the capacity range of the high-voltage shunt reactor under the corresponding working condition is determined, specifically: The operating condition type for generating a determination signal is obtained, and the intersection set D obtained by processing the generated determination signal under the operating condition type is used as the capacity range of the high-voltage shunt reactor under the determined corresponding operating condition, wherein D=A∩B∩C.

4. A method for determining the capacity of a high-voltage shunt reactor according to claim 1, characterized in that: Conduct distance analysis on the capacity range of the high-voltage shunt reactor under the corresponding working conditions to determine the optimal capacity of the high-voltage shunt reactor under the corresponding working conditions, including: If there is only one element in the intersection set D, the only remaining element is used as the optimal capacity of the high-voltage shunt reactor under the corresponding operating condition type; If the number of elements S in the intersection set D is greater than 1, then the optimal capacity of the high-voltage shunt reactor corresponding to the corresponding different target requirements is found in the sets A, B and C respectively, including: the optimal capacity AJ of the high-voltage shunt reactor that meets the potential current limit in the set A, the optimal capacity BJ of the high-voltage shunt reactor that meets the voltage fluctuation in the set B, and the optimal capacity CJ of the high-voltage shunt reactor that meets the reactive power balance in the set C; Assume that the optimal capacity of the high-voltage shunt reactor under the corresponding operating condition type is ZJ, where ZJ is in the intersection set D; For each element X in the intersection set D, calculate the sum of its distances from AJ, BJ, and CJ: D(X)=∣X−AJ∣+∣X−BJ∣+∣X−CJ∣; Traverse the intersection set D and find the X value that minimizes D(X), which is the optimal capacity ZJ of the high-voltage shunt reactor under the corresponding operating condition.

5. A method for determining the capacity of a high-voltage shunt reactor according to claim 1, characterized in that: The priority coefficient is obtained as follows: Compare the voltage, the secondary supply current and the reactive power in the previous operation cycle with the standard limit range of voltage, the standard limit range of secondary supply current and the standard limit range of reactive power respectively; If the voltage exceeds the voltage standard limit range, a voltage abnormality signal is generated; If the submersible current exceeds the submersible current standard limit range, a submersible current abnormal signal is generated; If the reactive power exceeds the reactive power standard limit range, a reactive power abnormal signal is generated; Based on the analysis of abnormal voltage signals, abnormal sub-supply current signals and abnormal reactive power signals, the priority coefficient of the voltage fluctuation target demand, the priority coefficient of the sub-supply current limitation target demand and the priority coefficient of the reactive power balance target demand are obtained, wherein the priority coefficient of the sub-supply current limitation target demand and the priority coefficient of the reactive power balance target demand are obtained in the same way as the priority coefficient of the voltage fluctuation target demand.

6. A method for determining the capacity of a high-voltage shunt reactor according to claim 5, characterized in that: The priority coefficient of the voltage fluctuation target requirement is obtained as follows: Count the total number of abnormal voltage signals, abnormal secondary current signals and abnormal reactive power signals in the previous operation cycle, and mark them as the total number of abnormalities; The number of times the voltage abnormality signal appears in the previous operation cycle is processed by ratio processing with the total number of abnormalities to obtain the voltage abnormality number ratio; Obtain the time when the voltage abnormality signal occurs each time, and sum and average them to obtain the mean value of the voltage abnormality duration, and perform ratio processing on the mean value of the voltage abnormality duration and the duration corresponding to the previous operation cycle to obtain the voltage abnormality time ratio; Mark the period in which the voltage abnormality signal continuously appears as the voltage abnormality period, obtain all voltage values ​​in the voltage abnormality period, and sum and average them to obtain the voltage mean value in the voltage abnormality period, perform difference processing on the voltage mean value and the nearest adjacent voltage standard limit range endpoint value, and take the absolute value of the difference to obtain the voltage deviation, perform ratio processing on the voltage deviation and the nearest adjacent voltage standard limit range endpoint value to obtain the voltage over-limit ratio, obtain the voltage over-limit ratio in all voltage abnormality periods, and obtain the voltage abnormality degree ratio; The voltage anomaly frequency ratio, voltage anomaly time ratio and voltage anomaly degree ratio are summed to obtain the priority coefficient of the voltage fluctuation target demand.

7. A method for determining the capacity of a high-voltage shunt reactor according to claim 1, characterized in that: According to the priority coefficients of different target requirements, the capacity range and optimal capacity of the high-voltage shunt reactor under the corresponding working conditions are determined, including: Based on generating the signal to be determined, if there is no intersection between the sets A, B and C, generating a first analysis signal; If any two of the sets A, B and C intersect, a second analysis signal is generated; Based on the first analysis signal, the capacity range of the high-voltage parallel reactor corresponding to the target demand with the largest priority coefficient is selected as the capacity range of the high-voltage parallel reactor under the corresponding working condition, and the optimal capacity within the capacity range of the high-voltage parallel reactor corresponding to the target demand is used as the optimal capacity of the high-voltage parallel reactor under the corresponding working condition.

8. A method for determining the capacity of a high-voltage shunt reactor according to claim 7, characterized in that: Based on the second analysis signal, the target demand types corresponding to the two intersecting sets are obtained, and the priority coefficients of the target demands are summed to obtain the total priority coefficients of the target demands corresponding to the two intersecting sets, and the total priority coefficients are marked as the intersecting priority coefficients, and the priority coefficients of the target demands corresponding to the other non-intersecting set are marked as the non-intersecting priority coefficients, and the intersecting priority total coefficients are compared with the non-intersecting priority coefficients; If the total coefficient of the intersection priority is greater than the coefficient of the non-intersecting priority, the intersection H of the two intersecting sets is obtained, and it is used as the capacity range of the high-voltage shunt reactor under the corresponding working condition. At the same time, the optimal capacities of the high-voltage shunt reactors corresponding to the target requirements of the two intersecting sets are obtained respectively, and they are marked as the first capacity and the second capacity; Obtain the priority coefficients of the target requirements corresponding to the two intersecting sets, and perform ratio processing on them to obtain the priority coefficient ratio of the two target requirements; Traverse the elements in the intersection H, find an element in the intersection H such that the ratio of the distance of the element to the first capacity point and the distance to the second capacity point is equal to the priority coefficient ratio, and use the found element as the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; If an element cannot be found in the intersection H such that the ratio of the distance of the element to the first capacity point to the distance to the second capacity point is equal to the priority coefficient ratio, then an element in the intersection H whose ratio of the distance to the first capacity point to the distance to the second capacity point is closer to the priority coefficient ratio is selected as the optimal capacity of the high-voltage shunt reactor under the corresponding operating conditions.

9. A method for determining the capacity of a high-voltage shunt reactor according to claim 8, characterized in that: comparing the total coefficient of intersecting priorities with the coefficient of non-intersecting priorities; If the total coefficient of the intersection priority is less than the non-intersecting priority coefficient, the same as the first analysis signal, the capacity range of the high-voltage shunt reactor of the target demand corresponding to the non-intersecting priority coefficient is selected as the capacity range of the high-voltage shunt reactor under the corresponding working condition, and the optimal capacity within the capacity range of the high-voltage shunt reactor of the corresponding target demand is used as the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; If the total coefficient of the intersecting priority is equal to the non-intersecting priority coefficient, then the capacity range of the high-voltage shunt reactor of the target demand corresponding to its non-intersecting priority coefficient or the intersection H corresponding to the total coefficient of the intersecting priority can be selected as the capacity range of the high-voltage shunt reactor under the corresponding working condition. The optimal capacity of the high-voltage shunt reactor under the corresponding working condition is determined according to the capacity range of the high-voltage shunt reactor under the corresponding working condition.

10. A system for determining the capacity of a high-voltage shunt reactor, the system being used to implement a method for determining the capacity of a high-voltage shunt reactor as claimed in any one of claims 1 to 9, characterized in that: include: Operation processing module: simulate and analyze the power system to obtain the capacity range of the high-voltage shunt reactor of the power system under different working conditions and different target requirements, and obtain the operation signal based on the intersection analysis of the capacity range of the high-voltage shunt reactor under different working conditions and different target requirements, wherein the operation signal includes a determined signal and a signal to be determined; The first determination module: determines the capacity range of the high-voltage shunt reactor under the corresponding working condition based on the determination signal, and performs distance analysis on the capacity range of the high-voltage shunt reactor under the corresponding working condition to determine the optimal capacity of the high-voltage shunt reactor under the corresponding working condition; The second determination module: based on the signal to be determined, obtain the operation history data of the power system under the corresponding working conditions, and based on the analysis of the operation history data, obtain the priority coefficients of different target demands under the corresponding working conditions, and determine the capacity range and optimal capacity of the high-voltage shunt reactor under the corresponding working conditions according to the priority coefficients of different target demands.

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