Capacitor combination using method and system of reactive compensation equipment

Abstract

The invention discloses a capacitor combination using method and system of reactive compensation equipment. The method comprises the steps that historical power supply power information and capacitor capacitance information in the reactive compensation equipment are acquired; dividing a plurality of power intervals according to the historical power supply power information; dividing a plurality of capacitor groups according to the capacitance values of the capacitors, wherein the capacitance values of the plurality of capacitors in the same group are the same or approximate; dividing a plurality of quantity distribution levels according to the quantity of the capacitors of each capacitor bank; establishing a mapping relationship between each number distribution level and the number distribution level of each different capacitor bank to form a plurality of mapping relationship chains of the number distribution levels; establishing a mapping relationship between the plurality of power intervals and the plurality of mapping relationship chains; acquiring actual power supply power of a user, and identifying a power interval where the actual power supply power is located; and based on the target power interval and the mapping relation chain, generating starting instructions of the plurality of capacitors. The method and the device have the effect of matching the number of capacitors with corresponding capacitance values for users according to needs.

Description

Technical Field

[0001] The present application relates to the technical field of reactive power compensation, and in particular to a capacitor combination use method and system for reactive power compensation equipment. Background Art

[0002] During the power transmission process of the power grid system, various inductors and other devices will consume part of the power supply. This part of power is not actually consumed by the user's power equipment, so it is called "reactive power". The other part of the power is actually consumed by the user's power equipment to do work, which is called "active power". The larger the reactive power is relative to the active power, the smaller the power factor is, and the lower the power supply efficiency of the power grid is.

[0003] In order to improve the utilization efficiency of power resources in the power grid, connecting a capacitor bank in the power supply line is one of the common technical means to improve the power factor, and the connected capacitor bank is usually one of the important components installed in the reactive power compensation equipment.

[0004] In the mountainous areas of my country's hilly regions, the tea industry is one of the main agricultural industries in the area, which not only fully utilizes the geographical advantages, but also drives the local economic development. Different tea-making farmers have different tea-making scales and tea-making processes, especially the multiple tea-making machinery and equipment included in the tea-making scale (such as multiple drum withering machines, tea rolling machines, tea drying machines and a series of related auxiliary equipment, etc.). Therefore, the actual power required by different tea-making farmers is also different, and operators often need to install reactive power compensation equipment (small, portable) in different areas where tea-making farmers are located.

[0005] However, the capacitor groups built into the reactive power compensation equipment are usually put into operation at the same time, and it is difficult for operators to put into operation the capacitor groups with corresponding capacitance according to the actual power consumption of the tea farmers. Summary of the invention

[0006] In order to match the number of capacitors with corresponding capacitance values ​​for users as needed, the present application provides a method and system for using a capacitor combination of a reactive compensation device.

[0007] In a first aspect, the present application provides a method for using a capacitor combination of a reactive power compensation device, which adopts the following technical solution:

[0008] A method for using a capacitor combination of a reactive power compensation device, comprising:

[0009] Obtaining historical power supply information of each user in the power distribution area and capacitance information of capacitors built into the reactive power compensation device;

[0010] Divide the historical power supply information into multiple power intervals;

[0011] According to the capacitance of each capacitor, multiple capacitor groups are divided, and the capacitance of multiple capacitors in the same group is the same or close;

[0012] According to the number of capacitors in each capacitor group, a plurality of quantity distribution levels are divided;

[0013] Establishing a mapping relationship between each of the quantity distribution levels and the quantity distribution level of each different capacitor bank to form a plurality of mapping relationship chains of the quantity distribution levels;

[0014] Establishing a mapping relationship between a plurality of the power intervals and a plurality of the mapping relationship chains;

[0015] Obtaining the actual power supply of the user where the reactive power compensation device is located, and identifying the power range in which the actual power supply is located;

[0016] Based on the target power interval and the corresponding mapping relationship chain, startup instructions for multiple capacitors are generated.

[0017] Through the above technical solution, the power supply information of each tea-making farmer in the power distribution area is collected and obtained, divided into multiple power intervals, and the capacitance information of the capacitor in the reactive compensation device is collected, divided into multiple capacitor groups. And the number of capacitors in each capacitor group is divided into multiple distribution levels.

[0018] Then, a mapping relationship is established between each quantity distribution level and the quantity distribution level of each different capacitor group, thereby forming a plurality of mapping relationship chains of quantity distribution levels, that is, there is a mapping relationship between each quantity distribution level of each group of capacitors and each quantity distribution level of another group of capacitors, and different quantity distribution levels of multiple different groups of capacitors are interconnected to form a mapping relationship chain.

[0019] Next, a mapping relationship between multiple power intervals and multiple mapping relationship chains is established. According to the actual power supply power of the tea farmers, the power interval, that is, the target power interval, is identified. Finally, according to the target power interval and the corresponding mapping relationship chain, startup instructions for multiple capacitors are generated, so that the startup of multiple capacitors can be controlled, and the number of capacitors with corresponding capacitance values ​​can be matched for users as needed, thereby improving the power factor and the utilization efficiency of power resources, which is beneficial to energy conservation and environmental protection.

[0020] In a preferred example, the present application may be further configured as generating startup instructions for multiple capacitors based on the target power interval and the corresponding mapping relationship chain, including:

[0021] According to the sum of the capacitance values ​​of the multiple capacitors corresponding to each mapping relationship chain, the mapping relationship chains are numbered and sorted to form a mapping relationship chain sequence list;

[0022] According to a preset sequence span, the mapping relationship chain sequence table is divided into a plurality of sequence intervals;

[0023] Obtaining the usage time of multiple capacitors corresponding to the target mapping relationship chain;

[0024] Compare the usage time of each capacitor corresponding to the target mapping relationship chain with a preset usage time threshold corresponding to the capacitor;

[0025] If the capacitors corresponding to the target mapping relationship chain include capacitors that have reached the preset usage time threshold, then in the sequence interval where the target mapping relationship chain is located, mapping relationship chains that do not include capacitors that have reached the preset usage time threshold are preferentially matched;

[0026] Using the matched mapping relationship chain that does not include the capacitor that has reached the preset usage time threshold as the instruction mapping relationship chain;

[0027] Based on the target power interval and the command mapping relationship chain, startup commands for multiple capacitors are generated.

[0028] Through the above technical solution, a plurality of mapping relationship chains are sorted according to the sum of the capacitance values ​​of the capacitors to form a mapping relationship chain sequence list, and the mapping relationship sequence list is divided into a plurality of sequence intervals, and the usage time of the capacitors in the target mapping relationship chain is compared with a preset usage time threshold, so as to facilitate the discovery of the capacitors included in the target mapping relationship chain, and to select, from the sequence interval where the target mapping relationship chain is located, a mapping relationship chain that does not include capacitors that have reached the preset usage time threshold (the capacitance of the capacitors that have reached the preset usage time threshold is significantly attenuated), so that the sum of the capacitance values ​​of the capacitors corresponding to the final matching mapping relationship chain can be close to the actual demand for reactive power compensation, fully improve the power factor, and reduce energy loss.

[0029] In a preferred example, the present application may be further configured as follows: if no mapping relationship chain including capacitors that have reached the preset usage time threshold is matched in the sequence interval where the target mapping relationship chain is located, then matching the mapping relationship chain with the least number of capacitors that have reached the preset usage time threshold in the sequence interval;

[0030] The mapping relationship chain with the least number of capacitors that have reached the preset usage time threshold is used as the instruction mapping relationship chain;

[0031] Based on the target power interval and the command mapping relationship chain, startup commands for multiple capacitors are generated.

[0032] Through the above technical solution, if the sequence interval where the target mapping relationship chain is located does not include any mapping relationship chain of capacitors that have reached the preset usage time threshold, then the mapping relationship chain with the least number of capacitors that have reached the preset usage time threshold is matched in the sequence interval (if there are multiple mapping relationship chains with the least number of capacitors that have reached the preset usage time threshold, further determination can be made, see below) as the instruction mapping relationship chain, thereby reducing the gap between the required capacitance value and the sum of the actual starting capacitor capacitance values.

[0033] In a preferred example, the present application may be further configured as follows: if in the sequence interval where the target mapping relationship chain is located, there are multiple mapping relationship chains with the least number of capacitors that have reached the preset usage time threshold, then the total failure time of the capacitors corresponding to the mapping relationship chains in the sequence interval after reaching the preset usage time threshold is obtained;

[0034] According to the total failure time, sorting the plurality of mapping relationship chains within the target sequence interval to generate a total failure time sequence table;

[0035] In the total failure time sequence table, the mapping relationship chain corresponding to the shortest total failure time is selected as the instruction mapping relationship chain.

[0036] Based on the target power interval and the command mapping relationship chain, startup commands for multiple capacitors are generated.

[0037] Through the above technical solution, if in the sequence interval where the target mapping relationship chain is located, there are multiple mapping relationship chains with the least number of capacitors that have reached the preset usage time threshold, for example, there are two mapping relationship chains in the sequence interval and the number of failed capacitors corresponding to each of them is 2, then the total failure time of the failed capacitors corresponding to each mapping relationship chain after reaching the preset usage time threshold is obtained, and they are sorted to generate a total failure time sequence table.

[0038] In the total failure time sequence table, the mapping relationship chain corresponding to the shortest total failure time is selected as the instruction mapping relationship chain, which can also screen out the mapping relationship chain with relatively short capacitor failure time, so that the sum of the capacitance values ​​of the capacitors finally started is closer to the actual needs of reactive power compensation.

[0039] In a preferred example, the present application may be further configured as follows: the mapping relationship chain that does not include the capacitor that has reached the preset usage time threshold is matched as an instruction mapping relationship chain, and then further includes:

[0040] Marking a mapping relationship chain including a capacitor that has reached the preset usage time threshold as an avoidance relationship chain;

[0041] Re-dividing the mapping relationship chain sequence list into a plurality of sequence intervals according to the position of the avoidance relationship chain in the mapping relationship chain sequence list and the preset sequence span;

[0042] The newly divided sequence intervals are used as the matching basis for the next mapping relationship chain.

[0043] Through the above technical solution, the avoidance relationship chain including the capacitor that has reached the preset usage time threshold is marked, and the mapping relationship chain sequence list is re-divided into a plurality of sequence intervals according to the position of the avoidance relationship chain in the mapping relationship chain sequence list and the preset sequence span, so as to avoid selecting the mapping relationship chain of the capacitor that has reached the preset usage time threshold again in the next mapping relationship chain matching process, which not only shortens the determination time of the system, but also facilitates matching the number of capacitors that are close to the corresponding capacitance for the user as needed.

[0044] In a preferred example, the present application may be further configured as follows: according to the position of the avoidance relationship chain in the mapping relationship chain sequence list and the preset sequence span, the mapping relationship chain sequence list is re-divided into a plurality of sequence intervals, including:

[0045] Obtaining the positions of the marked plurality of avoidance relationship chains in the mapping relationship chain sequence table and the preset sequence span;

[0046] Between the sequence numbers corresponding to any two adjacent avoidance relationship chains, the mapping relationship chain sequence table is re-divided into a plurality of sequence intervals according to the preset sequence span;

[0047] The sequence number corresponding to the avoidance relationship chain and the plurality of mapping relationship chains between the proximal endpoint sequence numbers of adjacent sequence intervals are divided into a filling sequence interval.

[0048] Through the above technical solution, the remaining sequence length between the sequence numbers of two adjacent avoidance relationship chains excluding the re-divided sequence interval is shorter than the preset sequence span. Therefore, multiple mapping relationship chains between the sequence numbers corresponding to the avoidance relationship chains and the proximal endpoint sequence numbers of the adjacent sequence intervals are divided into filling sequence intervals, which can fill the partial vacancies caused by the reduction of sequence intervals due to the appearance of avoidance relationship chains, thereby providing sufficient matching samples.

[0049] In a second aspect, the present application also provides a combined capacitor module, which adopts the following technical solution:

[0050] A combined capacitor module is used in the reactive compensation device mentioned in the method for using the capacitor combination of the reactive compensation device. The combined capacitor module includes n capacitor groups with different capacitances, each of which is provided with a plurality of capacitors, and the capacitor groups of different groups are used to form different capacitance orders of magnitude, wherein the total capacitance of the mth capacitor group is greater than or equal to the total capacitance of the m+1th capacitor group, 0<m<n, and m and n are both positive integers.

[0051] Through the above technical solution, the above-mentioned combined capacitor module is arranged in the reactive power compensation equipment. The combined capacitor module is provided with several capacitor groups. The capacitance of the capacitors included in the same capacitor group is equal or close. The capacitors of different groups can form different capacitance orders of magnitude. For example, the reactive power compensation equipment actually requires 1100 farads. Then, under ideal conditions, the capacitors of one group of capacitor groups can match a capacitance of 1000 farads, and the capacitors of the other group of capacitor groups can match a capacitance of 100 farads, so the cumulative capacitance is 1100 farads.

[0052] In a third aspect, the present application also provides a capacitor combination use system for reactive power compensation equipment, which adopts the following technical solution:

[0053] A capacitor combination use system for reactive power compensation equipment, comprising:

[0054] Information acquisition module: used to obtain the historical power supply information of each user in the power distribution area and the capacitance information of the capacitor built into the reactive power compensation device;

[0055] A division module: used to divide the historical power supply information into multiple power intervals;

[0056] Division module: used to divide the capacitors in the reactive power compensation device into multiple groups with the same or similar capacitance values ​​according to the capacitance values ​​of the capacitors in the reactive power compensation device;

[0057] A division module: used for dividing the capacitors of each capacitor group into a plurality of quantity distribution levels according to the quantity of the capacitors;

[0058] A mapping relationship establishing module: used to establish a mapping relationship between each of the quantity distribution levels and the quantity distribution level of each different capacitor group, forming a plurality of mapping relationship chains of quantity distribution levels;

[0059] A mapping relationship establishing module: used to establish a mapping relationship between a plurality of the power intervals and a plurality of the mapping relationship chains;

[0060] Information acquisition module: used to obtain the actual power supply of the user where the reactive power compensation device is located, and identify the target power range where the actual power supply power is located;

[0061] An instruction generation module is used to generate startup instructions for multiple capacitors based on the target power range and the corresponding mapping relationship chain.

[0062] In summary, this application includes the following beneficial technical effects:

[0063] 1. Through the mapping relationship chain of the number distribution level of capacitor groups, the operation of multiple capacitors in the reactive compensation equipment is finely controlled, and the number of capacitors with corresponding capacitance values ​​and corresponding capacitance values ​​are matched for tea farmers on demand, which improves the power factor and the utilization efficiency of power resources, and is conducive to energy conservation and environmental protection;

[0064] 2. By comparing the usage time of the capacitor corresponding to the matched mapping relationship chain with the preset usage time threshold, the capacitors that have reached the preset usage time are screened out to avoid putting capacitors that have reached the preset usage time threshold into use, thereby further improving the accuracy of on-demand matching of capacitors. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a structural block diagram of a method for using a capacitor combination of a reactive compensation device provided in an embodiment of the present application.

[0066] Figure 2 It is a schematic diagram of the “mapping relationship chain” mentioned in the embodiment of the present application.

[0067] Figure 3 This is a structural block diagram of the instruction mapping relationship chain generation provided in an embodiment of the present application.

[0068] Figure 4 This is a structural block diagram of the instruction mapping relationship chain generation provided in an embodiment of the present application.

[0069] Figure 5 This is a structural block diagram of the instruction mapping relationship chain generation provided in an embodiment of the present application.

[0070] Figure 6 It is a structural block diagram of the re-division of sequence intervals provided in an embodiment of the present application.

[0071] Figure 7 It is a structural block diagram of the filling sequence interval division provided in an embodiment of the present application.

[0072] Figure 8 It is a system block diagram of a capacitor combination use system of a reactive compensation device provided in an embodiment of the present application.

[0073] Description of reference numerals:

[0074] A, A type capacitor; B, B type capacitor; C, C type capacitor; a1, a2, a3 represent different quantity distribution levels of A type capacitor; b1, b2, b3 represent different quantity distribution levels of B type capacitor; c1, c2, c3 represent different quantity distribution levels of C type capacitor. DETAILED DESCRIPTION

[0075] The following is combined with Figure 1 -Attached Figure 8 This application is described in further detail.

[0076] Disclosed in an embodiment of the present application is a method for using a capacitor combination of a reactive compensation device, which can be applied to a capacitor combination system of the reactive compensation device.

[0077] See attached Figure 1 and attached Figure 2 As shown, a method for using a capacitor combination of a reactive compensation device includes:

[0078] S101. Obtain historical power supply information of each user in the power distribution area and capacitance information of capacitors built into reactive power compensation equipment.

[0079] In implementation, for a certain power distribution area, the historical power supply of each tea-making farmer in the area is obtained. The power supply here refers to the power supply from the power grid system to the tea-making farmer. And the capacitance information of multiple capacitors installed in the reactive power compensation equipment is obtained, that is, the capacitance value of each capacitor.

[0080] S102: Divide into multiple power intervals according to historical power supply information.

[0081] In implementation, the historical power supply to each tea-making farmer in the accessory area is divided into multiple power intervals. The multiple power intervals here can be continuous or multiple discrete intervals. It is only necessary to add the power supply changes of the tea-making farmers to the power interval division principle.

[0082] S103, dividing the capacitors into multiple capacitor groups according to the capacitance values ​​of the capacitors, wherein the capacitance values ​​of the capacitors in the same group are the same or close.

[0083] In practice, for each of the multiple groups of capacitors in the reactive power compensation device, the same type of capacitors may be selected. Then, the capacitances of the capacitors in the same group are equal or close to each other, so that the capacitors can be clearly grouped according to the capacitance.

[0084] S104, dividing into a plurality of quantity distribution levels according to the quantity of capacitors in each capacitor group.

[0085] In implementation, each capacitor group is divided into multiple quantity distribution levels according to its quantity. For example, quantity distribution level a1 corresponds to X1 capacitors, quantity distribution level a2 corresponds to X2 capacitors, and so on. The quantity distribution levels of other groups of capacitors are not described in detail.

[0086] S105 , establishing a mapping relationship between each quantity distribution level and the quantity distribution level of each different capacitor group, to form a plurality of mapping relationship chains of quantity distribution levels.

[0087] In implementation, the quantity distribution levels of each different capacitor group are connected to form a mapping relationship chain, so that the sum of the capacitance values ​​of multiple capacitors corresponding to different mapping relationship chains is different, that is, the multiple capacitors corresponding to each mapping relationship chain include different numbers of capacitors in each capacitor group, thereby improving the accuracy of capacitance matching (the specific explanation of the quantity distribution level mapping relationship chain is shown later).

[0088] S106: Establish a mapping relationship between multiple power intervals and multiple mapping relationship chains.

[0089] In implementation, a mapping relationship between a power interval and a mapping relationship chain is established so as to match a corresponding mapping relationship chain according to the determined power interval.

[0090] S107: Acquire the actual power supply of the user where the reactive power compensation device is located, and identify the power range in which the actual power supply is located.

[0091] In implementation, the power range in which the actual power supply is located is identified based on the actual power supply of the tea farmers obtained.

[0092] S108 . Generate startup instructions for multiple capacitors based on the target power range and the corresponding mapping relationship chain.

[0093] During implementation, startup instructions for multiple capacitors are generated based on the matched mapping relationship chain, so that the number of capacitors with corresponding capacitance and the corresponding capacitance can be matched for tea farmers on demand, which improves the power factor, improves the utilization efficiency of power resources, and is beneficial to energy conservation and environmental protection.

[0094] Through this method, the operation of multiple capacitors in the reactive compensation equipment can be finely controlled.

[0095] See attached Figure 2As shown, the explanation of the "mapping relationship chain" is as follows. The explanation in the following text is only for ease of understanding and is not a limitation of the relevant concepts. For example, suppose there are three capacitors with different capacitance specifications in a reactive power compensation device, namely, type A capacitor, type B capacitor, and type C capacitor. The relevant specific description after the capacitors are grouped is as follows:

[0096] The multiple quantity distribution levels of type A capacitor bank are: a1, a2, a3.

[0097] The multiple quantity distribution levels of the B type capacitor bank are: b1, b2, b3.

[0098] The multiple quantity distribution levels of C type capacitor bank are: c1, c2, c3.

[0099] Then, the number distribution level in capacitor group A is a1, and the number distribution level in capacitor group B is b1, b2, b 3， Similarly, there are corresponding relationships between the number distribution level b1 in the capacitor group B and the number distribution levels c1, c2, and c3 in the capacitor C. Then, some of the mapping relationship chains can be described as: a1-b1-c1 and a1-b2-c3, etc. ("-" only indicates the corresponding relationship), and the composition relationship of the remaining mapping relationship chains will not be repeated.

[0100] Attached Figure 2 In the figure, only two mapping relationship chains are shown, and the remaining mapping relationship chains are not shown.

[0101] Optional, see attached Figure 3 As shown, in step S108, the specific steps may be as follows:

[0102] S201 . According to the sum of the capacitance values ​​of the multiple capacitors corresponding to each mapping relationship chain, a plurality of mapping relationship chains are numbered and sorted to form a mapping relationship chain sequence list.

[0103] In implementation, several mapping relationship chains are numbered and arranged according to the sum of the capacitance values ​​of multiple capacitors corresponding to each mapping relationship chain to form a mapping relationship chain sequence list, and several mapping relationship chains are sorted out to facilitate subsequent data matching.

[0104] S202: Divide the mapping relationship chain sequence table into a plurality of sequence intervals according to a preset sequence span.

[0105] In implementation, the "sequence span" mentioned here refers to the sequence length of a number of mapping relationship chains in the mapping relationship sequence table, and the sequence interval refers to a set of multiple mapping relationship chains arranged in order.

[0106] S203: Obtain usage durations of multiple capacitors corresponding to the target mapping relationship chain.

[0107] In implementation, the usage time information of each capacitor in the reactive power compensation device can be obtained through a variety of ways, which will not be repeated here.

[0108] S204: Compare the usage time of each capacitor corresponding to the target mapping relationship chain with a preset usage time threshold corresponding to the capacitor.

[0109] In implementation, for example, a mapping relationship chain includes type A capacitors, type B capacitors, and type C capacitors. Then, the usage time of each type A capacitor is compared with the preset usage time threshold of the type A capacitor, and the same is true for the remaining type B capacitors and type C capacitors.

[0110] S205. If the capacitors corresponding to the target mapping relationship chain include capacitors that have reached a preset usage time threshold, then in the sequence interval where the target mapping relationship chain is located, mapping relationship chains that do not include capacitors that have reached the preset usage time threshold are preferentially matched.

[0111] In implementation, if the target mapping relationship chain includes a capacitor that has reached a preset usage time threshold, that is, for example, the mapping relationship chain corresponds to a capacitor that has reached the preset usage time threshold (in order to simplify the expression, the capacitor that has reached the preset usage time threshold is called a "failed capacitor"), then in the sequence interval where the mapping relationship chain is located, the mapping relationship chain that does not include the capacitor that has reached the preset usage time threshold is preferentially matched, thereby avoiding the startup of the failed capacitor and improving the accuracy of capacitor capacitance matching.

[0112] S206 , using the matched mapping relationship chain that does not include the capacitor that has reached the preset usage time threshold as the instruction mapping relationship chain.

[0113] In implementation, the mapping relationship chain that does not include the failed electrical appliances is used as the instruction mapping relationship chain to facilitate instruction generation.

[0114] S207 . Generate startup instructions for multiple capacitors based on the target power range and the instruction mapping relationship chain.

[0115] In implementation, according to the instruction mapping relationship chain that is finally matched, startup instructions for multiple capacitors of teammates in the instruction mapping relationship chain are generated to complete the startup operation of the multiple capacitors.

[0116] Optional, see attached Figure 4 As shown, after step S205, the following steps may also be included:

[0117] S301. If no mapping relationship chain including capacitors that have reached a preset usage time threshold is matched in the sequence interval where the target mapping relationship chain is located, then a mapping relationship chain with the least number of capacitors that have reached the preset usage time threshold is matched in the sequence interval.

[0118] In implementation, if there is no mapping relationship chain that does not include failed capacitors in the sequence interval where the target mapping relationship chain is located, then the mapping relationship chain with the least number of failed capacitors is matched in the sequence interval to improve the logic captured by the mapping relationship chain.

[0119] S302: Use the mapping relationship chain with the least number of capacitors that have reached a preset usage time threshold as the instruction mapping relationship chain.

[0120] S303: Generate startup instructions for multiple capacitors based on the target power range and the instruction mapping relationship chain.

[0121] The descriptions of step S302 and step S303 are similar to those of step S206 and step S207 and are not repeated here.

[0122] Optional, see attached Figure 5 After step 301, the following steps may also be included:

[0123] S401. If, in the sequence interval where the target mapping relationship chain is located, there are multiple mapping relationship chains with the least number of capacitors that have reached a preset usage time threshold, obtain the total failure time of the capacitors corresponding to the mapping relationship chains in the sequence interval after reaching the preset usage time threshold.

[0124] In implementation, if in the sequence interval where the target mapping relationship chain is located, there are multiple mapping relationship chains with the least number of failed capacitors (for example, in a certain mapping relationship chain, there are multiple mapping relationship chains containing K failed capacitors, and K is the mapping relationship chain with the minimum number of failed capacitors in the sequence interval), then the total failure time of the capacitors corresponding to the mapping relationship chains in the sequence interval after reaching a preset usage time threshold is obtained.

[0125] The “total failure time” mentioned here, taking a mapping relationship chain in a sequence interval as an example, refers to the sum of the time after all the corresponding failed capacitors in the mapping relationship chain reach a preset usage time threshold.

[0126] S402: Sort multiple mapping relationship chains within the target sequence interval according to the total failure time to generate a total failure time sequence table.

[0127] In implementation, according to the total failure time, multiple mapping relationship chains in the target sequence interval are sorted in order from large to small or from small to large. After the total failure time sequence list is generated, it is convenient to capture the target from the end of the total failure time sequence list, thereby shortening the target capture time and improving work efficiency.

[0128] S403. In the total failure time sequence table, select the mapping relationship chain corresponding to the shortest total failure time as the instruction mapping relationship chain.

[0129] S404: Generate startup instructions for multiple capacitors based on the target power range and the instruction mapping relationship chain.

[0130] The descriptions of step S403 and step S404 are similar to those of step S206 and step S207 and are not repeated here.

[0131] Optional, see attached Figure 6 As shown, after step S206, the following steps may also be included:

[0132] S501: Mark a mapping relationship chain including capacitors that have reached a preset usage time threshold as an avoidance relationship chain.

[0133] In implementation, capacitors that have reached a preset usage time threshold, i.e., failed capacitors, have severely decayed capacitance and no longer meet the basic conditions for equipment operation. At this time, if a failed capacitor corresponds to a certain mapping relationship chain, the mapping relationship chain where the failed capacitor is located is marked as an avoidance relationship chain, which means that when subsequent relationship chains are matched, the avoidance relationship chain will be excluded from the matching basis, thereby improving the accuracy of the electric heater capacitance matching.

[0134] S502: Re-divide the mapping relationship chain sequence list into a plurality of sequence intervals according to the position of the avoidance relationship chain in the mapping relationship chain sequence list and a preset sequence span.

[0135] In implementation, according to the above-mentioned "position" and "sequence span", the mapping relationship chain sequence list is re-divided into multiple sequence intervals, which can avoid the avoidance relationship chain and prevent the avoidance relationship chain from being matched as the target relationship chain again, thereby reducing the possibility of the failed capacitor being activated.

[0136] S503: Use the newly divided sequence intervals as the matching basis for the next mapping relationship chain.

[0137] In implementation, the re-divided sequence intervals do not include the mapping relationship chain including the failed capacitor, so the newly divided sequence intervals are used as the matching basis for the next mapping relationship chain, thereby reducing the possibility of the failed capacitor being activated.

[0138] Optional, see attached Figure 7 , the specific steps of step 502 may be as follows:

[0139] S601: Obtain positions of a plurality of marked avoidance relationship chains in a mapping relationship chain sequence table and a preset sequence span.

[0140] In implementation, the above position acquisition, taking a certain avoidance relationship chain as an example, refers to the specific sequence number of the avoidance relationship chain in the mapping relationship chain sequence table, so as to determine and plan the starting point of the sequence interval.

[0141] S602: Between the sequence numbers corresponding to any two adjacent avoidance relationship chains, the mapping relationship chain sequence table is re-divided into a plurality of sequence intervals according to a preset sequence span.

[0142] In implementation, taking two adjacent avoidance relationship chains as an example, for example, one of the avoidance relationship chains is numbered 2, and the other avoidance relationship chain is numbered 8. If the preset sequence span is 2 (here 2 represents two mapping relationship chains), then from sequence number 2 to sequence number 7, the sequence interval is divided according to the span value of 2. Sequence number 3 and sequence number 4 can be divided into a sequence interval, sequence number 5 and sequence number 6 can be divided into another sequence interval, and sequence number 7 can be divided into a sequence interval containing a single subset according to the situation.

[0143] S603: Divide the sequence numbers corresponding to the avoidance relationship chains and multiple mapping relationship chains between the proximal endpoint sequence numbers of the adjacent sequence intervals into a filling sequence interval.

[0144] In implementation, as described in the implementation of step S602, "sequence number 7 can be divided into a sequence interval containing a single subset according to the situation", which can fill in some vacancies in the sequence interval caused by the appearance of the avoidance relationship chain, thereby providing sufficient matching samples.

[0145] Of course, if the sequence span is greater than 2, there may be one or two mapping relationship chains that are not included in the sequence interval. At this time, the remaining one or two mapping relationship chains are divided into filling sequence intervals. The concepts of "filling sequence interval" and "sequence interval" are basically the same. The different names here are only for the convenience of distinction.

[0146] Similar situations where the sequence span is greater than 2 will not be described in detail.

[0147] The embodiment of the present application also discloses a combined capacitor module, which is used in the reactive power compensation device mentioned in the above method. The combined capacitor module includes n capacitor groups with different capacitance values, each capacitor group is provided with a plurality of capacitors, and different groups of capacitor groups are used to form different capacitance orders of magnitude, wherein the total capacitance of the mth capacitor group is greater than or equal to the total capacitance of the m+1th capacitor group, 0<m<n, and m and n are both positive integers.

[0148] The capacitors included in the same capacitor group have the same or similar capacitance values ​​(which can be understood here as capacitors of the same model), and different groups of capacitors can form different capacitance values ​​of different magnitudes.

[0149] For example, the reactive power compensation equipment actually needs to provide a capacitance of 1100 farads. Under ideal conditions, the capacitors in one capacitor group can match a capacitance of 1000 farads, and the capacitors in the other capacitor group can match a capacitance of 100 farads. The accumulated capacitance is 1100 farads, thus providing precise capacitance matching.

[0150] As attached Figure 8 As shown, the embodiment of the present application also discloses a capacitor combination use system for reactive compensation equipment, the system includes an information acquisition module, a division module, a mapping relationship establishment module and a module, and the specific functions of the relevant modules are as follows:

[0151] Information acquisition module: used to obtain the historical power supply information of each user in the distribution area and the capacitance information of the capacitor built into the reactive power compensation equipment.

[0152] Division module: used to divide multiple power intervals according to historical power supply information.

[0153] Division module: used to divide the capacitors in the reactive power compensation device into multiple capacitor groups with the same or similar capacitance values ​​according to the capacitance values ​​of the capacitors in the reactive power compensation device.

[0154] Division module: used for dividing into a plurality of quantity distribution levels according to the quantity of capacitors in each capacitor group.

[0155] Mapping relationship establishment module: used to establish a mapping relationship between each quantity distribution level and the quantity distribution level of each different capacitor group, forming a plurality of mapping relationship chains of quantity distribution levels.

[0156] Mapping relationship establishment module: used to establish mapping relationships between multiple power intervals and multiple mapping relationship chains.

[0157] Information acquisition module: used to obtain the actual power supply of the user where the reactive power compensation equipment is located, and identify the target power range where the actual power supply power is located.

[0158] Instruction generation module: used to generate startup instructions for multiple capacitors based on the target power range and the corresponding mapping relationship chain.

[0159] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application in turn. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for using a capacitor combination of a reactive power compensation device, characterized in that: The method comprises: Obtaining historical power supply information of each user in the power distribution area and capacitance information of capacitors built into the reactive power compensation device; Dividing a plurality of power intervals according to the historical power supply information; According to the capacitance of each capacitor, multiple capacitor groups are divided, and the capacitance of multiple capacitors in the same group is the same or close; According to the number of capacitors in each capacitor group, a plurality of quantity distribution levels are divided; Establishing a mapping relationship between each of the quantity distribution levels and the quantity distribution level of each different capacitor bank to form a plurality of mapping relationship chains of the quantity distribution levels; Establishing a mapping relationship between a plurality of the power intervals and a plurality of the mapping relationship chains; Obtaining the actual power supply of the user where the reactive power compensation device is located, and identifying the power range in which the actual power supply is located; Based on the target power interval and the corresponding mapping relationship chain, startup instructions for multiple capacitors are generated.

2. The method for using a capacitor combination of a reactive power compensation device according to claim 1, characterized in that: The generating a startup instruction of a plurality of capacitors based on the target power interval and the corresponding mapping relationship chain includes: According to the sum of the capacitance values ​​of the multiple capacitors corresponding to each mapping relationship chain, the mapping relationship chains are numbered and sorted to form a mapping relationship chain sequence list; According to a preset sequence span, the mapping relationship chain sequence table is divided into a plurality of sequence intervals; Obtaining the usage time of multiple capacitors corresponding to the target mapping relationship chain; Compare the usage time of each capacitor corresponding to the target mapping relationship chain with a preset usage time threshold corresponding to the capacitor; If the capacitors corresponding to the target mapping relationship chain include capacitors that have reached the preset usage time threshold, then in the sequence interval where the target mapping relationship chain is located, mapping relationship chains that do not include capacitors that have reached the preset usage time threshold are preferentially matched; Using the matched mapping relationship chain that does not include the capacitor that has reached the preset usage time threshold as the instruction mapping relationship chain; Based on the target power interval and the command mapping relationship chain, startup commands for multiple capacitors are generated.

3. The method for using a capacitor combination of a reactive power compensation device according to claim 2, characterized in that: The method further comprises: If no mapping relationship chain that does not include capacitors that have reached the preset usage time threshold value can be matched in the sequence interval where the target mapping relationship chain is located, then matching the mapping relationship chain with the least number of capacitors that have reached the preset usage time threshold value in the sequence interval; The mapping relationship chain with the least number of capacitors that have reached the preset usage time threshold is used as the instruction mapping relationship chain; Based on the target power interval and the command mapping relationship chain, startup commands for multiple capacitors are generated.

4. The method for using a capacitor combination of a reactive power compensation device according to claim 3, characterized in that: The method further comprises: If, in the sequence interval where the target mapping relationship chain is located, there are multiple mapping relationship chains with the least number of capacitors that have reached the preset usage time threshold, then obtaining the total failure time of the capacitors corresponding to the mapping relationship chains in the sequence interval after reaching the preset usage time threshold; According to the total failure time, sorting the plurality of mapping relationship chains within the target sequence interval to generate a total failure time sequence table; In the total failure time sequence table, selecting the mapping relationship chain corresponding to the shortest total failure time as the instruction mapping relationship chain; Based on the target power interval and the command mapping relationship chain, startup commands for multiple capacitors are generated.

5. The method for using a capacitor combination of a reactive power compensation device according to claim 2, characterized in that: The matched mapping relationship chain that does not include the capacitor that has reached the preset usage time threshold is used as an instruction mapping relationship chain, and then further includes: Marking a mapping relationship chain including a capacitor that has reached the preset usage time threshold as an avoidance relationship chain; Re-dividing the mapping relationship chain sequence list into a plurality of sequence intervals according to the position of the avoidance relationship chain in the mapping relationship chain sequence list and the preset sequence span; The newly divided sequence intervals are used as the matching basis for the next mapping relationship chain.

6. The method for using a capacitor combination of a reactive power compensation device according to claim 5, characterized in that: The step of re-dividing the mapping relationship chain sequence list into a plurality of sequence intervals according to the position of the avoidance relationship chain in the mapping relationship chain sequence list and the preset sequence span includes: Obtaining the positions of the marked plurality of avoidance relationship chains in the mapping relationship chain sequence table and the preset sequence span; Between the sequence numbers corresponding to any two adjacent avoidance relationship chains, the mapping relationship chain sequence table is re-divided into a plurality of sequence intervals according to the preset sequence span; The sequence number corresponding to the avoidance relationship chain and the plurality of mapping relationship chains between the proximal endpoint sequence numbers of adjacent sequence intervals are divided into a filling sequence interval.

7. A combined capacitor module, used in the reactive power compensation device mentioned in the method for using a combined capacitor of a reactive power compensation device according to any one of claims 1 to 6, characterized in that: The combined capacitor module includes n capacitor groups with different capacitances, each of which is provided with a plurality of capacitors, and the capacitor groups of different groups are used to form different capacitance orders of magnitude, wherein the total capacitance of the mth capacitor group is greater than or equal to the total capacitance of the m+1th capacitor group, 0<m<n, and m and n are both positive integers.

8. A capacitor combination use system for reactive power compensation equipment, characterized in that: include: Information acquisition module: used to obtain the historical power supply information of each user in the power distribution area and the capacitance information of the capacitor built into the reactive power compensation device; A division module: used to divide the historical power supply information into multiple power intervals; Division module: used to divide the capacitors in the reactive power compensation device into multiple groups with the same or similar capacitance values ​​according to the capacitance values ​​of the capacitors in the reactive power compensation device; A division module: used for dividing the capacitors of each capacitor group into a plurality of quantity distribution levels according to the quantity of the capacitors; A mapping relationship establishing module: used to establish a mapping relationship between each of the quantity distribution levels and the quantity distribution level of each different capacitor group, forming a plurality of mapping relationship chains of quantity distribution levels; A mapping relationship establishing module: used to establish a mapping relationship between a plurality of the power intervals and a plurality of the mapping relationship chains; Information acquisition module: used to obtain the actual power supply of the user where the reactive power compensation device is located, and identify the target power range where the actual power supply power is located; An instruction generation module is used to generate startup instructions for multiple capacitors based on the target power range and the corresponding mapping relationship chain.

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