Voltage regulation method, device and equipment

Abstract

The embodiment of the invention provides a voltage regulation method, device and equipment. The method is applied to a multi-stage transformer substation, and the multi-stage transformer substation comprises a bus and a transformer. The method comprises the following steps: in response to the condition that the voltage of a highest voltage level bus does not meet a first preset voltage range, performing first voltage regulation through the highest voltage level bus; and in response to the fact that the voltage of the highest-voltage-grade bus obtained by the first voltage regulation result does not meet a first preset voltage range, regulating reactive power loss of at least one grade of other-grade transformer substation according to a power factor of a transformer of at least one grade of other-grade transformer substation, therefore, the voltage of the highest-voltage-level bus is adjusted to be within the first preset voltage range. The method is used for achieving the effect of accurately adjusting the voltage of the bus in the multi-stage transformer substation.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a voltage regulation method, device and equipment. Background Art

[0002] In the power grid system, when the bus voltage of the substation is too high or too low, the substation adjusts the bus voltage to an acceptable range to ensure the stable operation of the power grid system.

[0003] In the related art, each substation adjusts the voltage based on the voltage of the bus of the station. In the process of voltage regulation, the influence of the regulation of the bus voltage of the station on the bus voltage of other substations is not considered.

[0004] In the related art, when each substation adjusts the voltage based on the voltage situation of the station, it will affect the bus voltage of other related substations, resulting in inaccurate bus voltage regulation of the substation in the power grid system. Therefore, how to improve the accuracy of bus voltage regulation of substations in the power grid system has become an urgent problem to be solved. Summary of the invention

[0005] The embodiments of the present application provide a voltage regulation method, device and equipment for achieving the effect of accurately regulating the voltage of a bus in a multi-level substation.

[0006] In a first aspect, an embodiment of the present application provides a voltage regulation method, which is applied to a multi-level substation, wherein the multi-level substation includes a bus and a transformer respectively; the method includes:

[0007] In response to the voltage of the busbar with the highest voltage level not satisfying the first preset voltage range, performing a first voltage adjustment through the busbar with the highest voltage level;

[0008] In response to the fact that the voltage of the highest voltage level bus obtained by the first voltage regulation result does not satisfy the first preset voltage range, the reactive loss of the at least one other level substation is adjusted according to the power factor of the transformer of at least one other level substation to adjust the voltage of the highest voltage level bus to within the first preset voltage range.

[0009] In a possible implementation manner, adjusting the reactive power loss of at least one other level substation according to the power factor of the transformer of at least one other level substation includes:

[0010] For each of the at least one other level substation, the following reactive power loss adjustment operation is performed:

[0011] Maintaining the bus voltage of the substation of the other level within the corresponding second preset voltage range, or adjusting the bus voltage of the substation of the other level to the second preset voltage range;

[0012] If the reactive power of the transformer of the other level substation meets the first preset condition, and it is determined that the power factor of the transformer is less than the lower limit of the first preset factor range, a reactive compensation module is switched on and off on the busbar of the other level substation to perform a second voltage regulation corresponding to the other level substation;

[0013] If, after the second voltage adjustment of each of the substations of other levels, it is determined that the voltage of the busbar of the highest voltage level meets the first preset voltage range, the reactive loss adjustment operation is stopped;

[0014] Otherwise, the lower limit of the first preset factor range is reduced, and the reactive loss adjustment operation is repeatedly performed until a second preset condition is met.

[0015] In a possible implementation, the method further includes: in response to determining that the reactive power of the transformer of the other level substation does not meet the first preset condition, switching on a reactive compensation module on a busbar of the other level substation.

[0016] In a possible implementation manner, the second preset condition includes at least one of the following:

[0017] By means of the reactive loss adjustment operation, the voltage of the busbar with the highest voltage level is adjusted to the first preset voltage range;

[0018] After lowering the lower limit of the first preset factor range, the lower limit of the first preset factor range does not meet the preset lower limit condition;

[0019] The transformation ratio adjustment of the transformer cannot ensure that the bus voltage of other levels of substations is within the second preset voltage range.

[0020] In a possible implementation manner, adjusting the bus voltage of the substation of another level to the second preset voltage range includes:

[0021] In response to detecting that the bus voltage of the other level substation is not within the second preset voltage range, the transformation ratio of the transformer of the other level substation is adjusted to adjust the bus voltage of the other level substation to within the second preset voltage range.

[0022] In a possible implementation manner, the reactive power compensation module includes a capacitor group and a reactor group.

[0023] In a possible implementation manner, performing the first voltage regulation through the bus with the highest voltage level includes:

[0024] The first voltage regulation is performed by switching on at least one capacitor group or reactor group on the busbar with the highest voltage level.

[0025] In a possible implementation manner, the first voltage regulation by switching on at least one capacitor group or reactor group on the highest voltage level bus includes:

[0026] If the voltage of the busbar with the highest voltage level is higher than the first preset voltage range, at least one capacitor group existing on the busbar with the highest voltage level is cut out, and / or at least one reactor group is added to the busbar with the highest voltage level;

[0027] If the voltage of the busbar with the highest voltage level is lower than the first preset voltage range, at least one existing reactor group on the busbar with the highest voltage level is cut out, and / or at least one capacitor group is added to the busbar with the highest voltage level.

[0028] In a second aspect, an embodiment of the present application provides a voltage regulating device, which is applied to a multi-level substation, wherein the multi-level substation includes a bus and a transformer respectively; the device includes:

[0029] A first regulating module, configured to perform a first voltage regulation through the bus of the highest voltage level in response to the voltage of the bus of the highest voltage level not satisfying a first preset voltage range;

[0030] A second regulation module is used for adjusting the reactive loss of at least one other level substation according to the power factor of the transformer of at least one other level substation in response to the voltage of the highest voltage level bus obtained by the first voltage regulation result not satisfying the first preset voltage range, so as to adjust the voltage of the highest voltage level bus to within the first preset voltage range.

[0031] In a third aspect, an embodiment of the present application provides a voltage regulating device, including: a memory, a processor;

[0032] The memory stores computer-executable instructions;

[0033] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above first aspect and / or various possible implementations of the first aspect.

[0034] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the first aspect above and / or various possible implementations of the first aspect.

[0035] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above first aspect and / or various possible implementation methods of the first aspect.

[0036] The voltage regulation method, device and equipment provided in the embodiments of the present application, when the voltage of the busbar of the highest voltage level in a multi-level substation is not within the preset voltage range, the voltage is first regulated through the busbar of the highest voltage level. If the voltage of the busbar of the highest voltage level is still not within the preset voltage range after the adjustment, then the reactive power loss of at least one other level of substation is adjusted according to the power factor of the transformer of at least one other level of substation, so as to adjust the voltage of the busbar of the highest voltage level to within the preset voltage range. By starting the voltage regulation strategy of the busbar of the highest voltage level itself, when the voltage regulation is unsuccessful, the linkage voltage regulation strategy of the substations of other levels is started, thereby improving the accuracy of busbar voltage regulation in the multi-level substation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0038] Figure 1 A schematic diagram of a flow chart of a voltage regulation method provided in this application;

[0039] Figure 2 A schematic diagram of the structure of the voltage regulator provided in this application;

[0040] Figure 3 This is a schematic diagram of the structure of the voltage regulation device provided in this application.

[0041] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0042] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0043] For some power supply areas of the power grid, the power load varies greatly in different time periods. The power load is high during weekdays and low during weekends. Therefore, the highest and lowest loads of the power consumption data in these areas lead to obvious peaks and valleys, and large voltage fluctuations. Too high or too low voltage will affect the stable operation of the power grid system. Therefore, it is necessary to adjust the voltage to within the qualified range to ensure the stable operation of the power grid system.

[0044] The relevant technology regulates the voltage. Each substation of the multi-level substation adjusts the voltage of the subordinate bus by switching on and off capacitor groups, reactor groups, or adjusting the transformation ratio of the transformer based on the voltage conditions of the station. By investing capacitors on the bus, reactive power can be added to the power grid system, thereby increasing the bus voltage. By switching off the capacitor groups that have been invested on the bus, the bus voltage can be reduced. By investing reactor groups on the bus, the reactive power of the power grid system can be absorbed, thereby reducing the bus voltage. By switching off the reactor groups that have been invested on the bus, the bus voltage can be increased. By reducing the transformation ratio of the transformer, the voltage of the bus connected to the transformer can be increased. By increasing the transformation ratio of the transformer, the voltage of the bus connected to the transformer can be reduced.

[0045] For a power grid system including multiple substations, such as a power grid system including a 500kV bus, a 500kV transformer, a 220kV bus, a 220kV transformer, a 110kV bus, a 110kV transformer, and a 10kV bus, a transformation situation includes a 500kV transformer transforming a high voltage to a 500kV bus, a medium voltage to a 220kV bus, and a low voltage to a 35kV bus. A 220kV transformer transforming a high voltage to a 220kV bus, a medium voltage to a 110kV bus, and a low voltage to a 10kV bus. A 110kV transformer transforming a high voltage to a 110kV bus, and a low voltage to a 10kV bus. The middle or low-voltage busbar of a 500kV transformer is connected to capacitor groups and reactor groups. The voltage on the busbar can be adjusted by switching on and off the capacitor groups and reactor groups. The middle or low-voltage busbar of a 220kV transformer and the low-voltage busbar of a 110kV transformer are connected to capacitor groups and reactor groups. The voltage on the busbar can be adjusted by switching on and off the capacitor groups and reactor groups. At the same time, the busbar voltage can also be adjusted by adjusting the transformation ratio of the 220kV transformer or the 110kV transformer.

[0046] For the power grid system including 500kV bus, 500kV transformer, 220kV bus, 220kV transformer, 110kV bus, 110kV transformer and 10kV bus, since each substation adjusts the voltage based on the voltage conditions of its own station, if the voltage input from the 500kV bus (the highest voltage level bus) to the 550kV transformer is not within the qualified range, after the capacitor groups and reactor groups are switched on and off at the busbars of all levels connected to the 550kV transformer, the voltage of the highest voltage level bus is still not within the qualified range. At this time, the voltage of the highest voltage level bus cannot be adjusted to within the qualified range by other means.

[0047] Based on the above analysis, it can be concluded that when the relevant technology adjusts the bus voltage in the power grid system, there is a technical problem of inaccurate bus voltage regulation.

[0048] The voltage regulation method, device and equipment provided in this application are intended to solve the above problems existing in the related technologies.

[0049] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0050] Figure 1 The flow chart of the voltage regulation method provided in this application is applied to a multi-level substation, where the multi-level substation includes a bus and a transformer, such as Figure 1 As shown, the method includes:

[0051] S101. In response to the voltage of the bus with the highest voltage level not satisfying a first preset voltage range, performing a first voltage adjustment via the bus with the highest voltage level.

[0052] It should be noted that setting the voltage of the bus with the highest voltage level within the first preset voltage range can ensure the stable operation of the power grid system and reduce the hidden dangers of the power grid system caused by excessively high or low bus voltage.

[0053] The first voltage regulation method may be based on an existing voltage regulation method of the substation.

[0054] S102. In response to the voltage of the highest voltage level bus obtained by the first voltage regulation result not satisfying the first preset voltage range, the reactive loss of at least one other level substation is adjusted according to the power factor of the transformer of at least one other level substation to adjust the voltage of the highest voltage level bus to within the first preset voltage range.

[0055] It should be noted that the power of the transformer is divided into apparent power S, active power P and reactive power Q. S, P and Q satisfy the following formula (1):

[0056] (1);

[0057] The power factor C of the transformer can be calculated using the active power P and the apparent power using the following formula (2):

[0058] (2);

[0059] The power factor C can be used to measure the effective utilization rate of the input power. The value of the power factor C can be a number between A and 1, where A is greater than 0 and less than 1. For 220kV and 110kV transformers, in order to ensure the effective utilization rate of the input power, the value of the power factor C is generally greater than 0.85, that is, the value of A is generally greater than 0.85.

[0060] When the voltage of the highest voltage level bus obtained by the first voltage regulation result does not meet the first preset voltage range, the reactive loss of at least one other level substation is adjusted according to the power factor of the transformer of at least one other level substation to initiate the linkage voltage regulation of other levels of substations. There is no order of priority in the timing of starting the linkage voltage regulation of each other level of substations, and the linkage voltage regulation of each other level of substations is independent of each other.

[0061] In order to make the voltage of the highest voltage level bus more stable after adjustment, that is, to avoid frequent voltage adjustment, when adjusting the voltage of the highest voltage level bus to within the first preset voltage range, the voltage of the highest voltage level bus can be adjusted to a sub-range of the first preset voltage range.

[0062] As an example, if the first preset voltage range is U 1 to U 2 , the voltage of the bus with the highest voltage level can be adjusted to U 3 to U 4 , where U 1 , U 2 , U 3 , U 4 Meet U 1 3 4 2 .

[0063] ​​​The voltage regulation method provided in the embodiment of the present application, when the voltage of the busbar of the highest voltage level in a multi-level substation is not within the preset voltage range, the voltage is first regulated through the busbar of the highest voltage level. If the voltage of the busbar of the highest voltage level is still not within the preset voltage range after the adjustment, then the reactive power loss of at least one other level of substation is adjusted according to the power factor of the transformer of at least one other level of substation, so as to adjust the voltage of the busbar of the highest voltage level to within the preset voltage range. By starting the voltage regulation strategy of the busbar of the highest voltage level itself, when the voltage regulation is unsuccessful, the linkage voltage regulation strategy of the substations of other levels is started, thereby improving the accuracy of busbar voltage regulation in the multi-level substation.

[0064] The technical solution of the present application is further explained below by taking the example of adjusting the bus voltage in a power grid system including a 500kV bus, a 500kV transformer, a 220kV bus, a 220kV transformer, a 110kV bus, a 110kV transformer, and a 10kV bus.

[0065] In some embodiments, in step S102, adjusting the reactive power loss of at least one other level substation according to the power factor of the transformer of at least one other level substation includes:

[0066] For each other level substation of at least one other level substation, the following reactive power loss regulation operation is performed:

[0067] First, the bus voltage of the substation of another level is maintained within the corresponding second preset voltage range, or the bus voltage of the substation of another level is adjusted to the second preset voltage range.

[0068] Second, if the reactive power of the transformer of the other level substation meets the first preset condition and it is determined that the power factor of the transformer is less than the lower limit of the first preset factor range, a reactive compensation module is switched on and off on the busbar of the other level substation to perform a second voltage regulation corresponding to the other level substation.

[0069] Third, if after the second voltage adjustment of each other level substation, it is determined that the voltage of the busbar of the highest voltage level meets the first preset voltage range, the reactive loss adjustment operation is stopped.

[0070] Fourth, otherwise, lower the lower limit of the first preset factor range, and repeat the reactive power loss adjustment operation until the second preset condition is met.

[0071] In some implementations of these embodiments, the method further comprises:

[0072] Fifth, in response to determining that the reactive power of the transformer of the other level substation does not meet the first preset condition, a reactive compensation module is switched on the busbar of the other level substation.

[0073] In some implementations of these embodiments, the second preset condition includes at least one of the following:

[0074] The voltage of the busbar with the highest voltage level is adjusted to a first preset voltage range through a reactive loss adjustment operation.

[0075] After the lower limit of the first preset factor range is lowered, the lower limit of the first preset factor range does not meet the preset lower limit condition.

[0076] The transformation ratio adjustment of the transformer cannot ensure that the bus voltage of other levels of substations is within the second preset voltage range.

[0077] It should be noted that the reactive power compensation module adjusts the reactive power loss in the power grid system by supplementing or absorbing reactive power into the power grid system, thereby adjusting the voltage of each bus in the power grid system.

[0078] As an example, the reactive power compensation module includes a capacitor group and a reactor group.

[0079] In the first step, the voltage of the busbars of other levels of substations is set within the second preset voltage range, which can ensure the stable operation of the power grid system and reduce the hidden dangers of power grid system operation caused by excessively high or low busbar voltage.

[0080] The bus voltage of the substation of another level can be ensured to be within the second preset range by adjusting the transformation ratio of the transformer. Specifically, adjusting the bus voltage of the substation of another level to the second preset voltage range includes:

[0081] In response to detecting that the bus voltage of the other level substation is not within the second preset voltage range, the transformation ratio of the transformer of the other level substation is adjusted to adjust the bus voltage of the other level substation to within the second preset voltage range.

[0082] By adjusting the transformation ratio of the transformer to ensure that the bus voltage of the substation of another level is within the second preset voltage range, subsequent linkage voltage regulation operations can be performed under the premise of ensuring that the bus voltage of the substation of another level is regulated to be qualified.

[0083] The preset factor range may be a range from A to 1, wherein the value of A is greater than a preset lower limit condition.

[0084] As an example, the preset factor range may be 0.95 to 1, and the preset lower limit condition is that A is greater than or equal to 0.85.

[0085] As an example, if the voltage of a 550 kV bus (the highest voltage level bus) exceeds a first preset voltage range, the linkage voltage regulation of at least one other level substation associated with the 550 kV bus is started.

[0086] For each of the at least one other level substations associated with the 550 kV bus, the following reactive power loss regulation operation is performed:

[0087] An example is given for explaining a lower level 110 kV busbar associated with the 550 kV busbar, where the 110 kV busbar is obtained from a 220 kV transformer.

[0088] Step 11, determine whether the voltage of the 110kV bus is within the second preset voltage range. If it is higher than the second preset voltage range, then adjust the transformation ratio of the 220kV transformer to reduce the voltage of the 110kV bus until the voltage of the 110kV bus is adjusted to the second preset voltage range. When the voltage of the 110kV bus cannot be adjusted to the second preset voltage range by adjusting the transformation ratio of the 220kV transformer, exit this round of reactive loss adjustment operation.

[0089] Step 12: The first preset condition is to determine whether the reactive power of the 220 kV transformer is less than or equal to zero. If the reactive power of the 220 kV transformer is less than or equal to zero, then execute step 13; otherwise, execute step 16.

[0090] Step 13: Determine whether the power factor of the 220 kV transformer is less than the lower limit of the first preset factor range. If the power factor of the 220 kV transformer is less than the lower limit of the first preset factor range, execute step 14; otherwise, execute step 15.

[0091] Step 14: Switch out a reactor group or put in a capacitor group on the 110kV bus. If after this switching operation, the power factor of the 220kV transformer is within the first preset factor range, or the 550kV bus voltage is within the first preset voltage range, or all the reactor groups have been switched out and all the capacitor groups have been put in, then exit this round of reactive power loss adjustment operation; if the reactive power of the 220kV transformer is greater than zero, cancel this switching operation and exit this round of reactive power loss adjustment operation.

[0092] Step 15: If the power factor of the 220kV transformer is greater than or equal to the lower limit of the first preset factor range, the 220kV transformer and the 220kV bus do not need to perform linkage voltage regulation.

[0093] Step 16: If the reactive power of the 220kV transformer does not meet the first preset condition, that is, the reactive power of the 220kV transformer is greater than zero, a capacitor group is cut out from the 220kV bus, or a reactor group is put in. If after this switching operation, the reactive power of the 220kV transformer is less than or equal to zero, or the 550kV bus voltage is within the first preset voltage range, or all capacitor groups have been cut out and all reactor groups have been put in, then exit this round of reactive loss adjustment operation.

[0094] After this round of reactive loss regulation operation is completed, if the 550kV bus voltage still exceeds the first preset voltage range, the lower limit of the first preset factor range is lowered (for example, the lower limit of the first preset factor range can be lowered by 3%). If after lowering the lower limit of the first preset factor range, the lower limit does not meet the preset lower limit condition (for example, the lower limit is less than 0.85), then this voltage regulation is terminated, otherwise, the next round of reactive loss regulation operation is continued. If the 550kV bus voltage is within the first preset voltage range, or the transformation ratio of the transformers of all other levels of substations cannot be adjusted to the qualified range for the lower-level bus voltage connected to any transformer, then this voltage regulation is terminated, otherwise, the next round of reactive loss regulation operation is continued.

[0095] As an example, if the voltage of a 550 kV bus (the highest voltage level bus) is lower than a first preset voltage range, the linkage voltage regulation of at least one other level substation associated with the 550 kV bus is started.

[0096] For each of the at least one other level substations associated with the 550 kV bus, the following reactive power loss regulation operation is performed:

[0097] An example is given for explaining a lower level 110 kV busbar associated with the 550 kV busbar, where the 110 kV busbar is obtained from a 220 kV transformer.

[0098] Step 21, determine whether the voltage of the 110kV bus is within the second preset voltage range. If it is lower than the second preset voltage range, then adjust the voltage of the 110kV bus by lowering the transformation ratio of the 220kV transformer until the voltage of the 110kV bus is adjusted to the second preset voltage range. When the voltage of the 110kV bus cannot be adjusted to the second preset voltage range by adjusting the transformation ratio of the 220kV transformer, exit the secondary round of reactive loss adjustment operation.

[0099] Step 22: The first preset condition is to determine whether the reactive power of the 220 kV transformer is greater than or equal to zero. If the reactive power of the 220 kV transformer is greater than or equal to zero, then execute step 23; otherwise, execute step 26.

[0100] Step 23, determine whether the power factor of the 220kV transformer is less than the lower limit of the first preset factor range. If the power factor of the 220kV transformer is less than the lower limit of the first preset factor range, execute step 24, otherwise execute step 25.

[0101] Step 24: Cut out a capacitor bank or put in a reactor bank on the 110kV bus. If after this switching operation, the power factor of the 220kV transformer is within the first preset factor range, or the 550kV bus voltage is within the first preset voltage range, or all capacitor banks have been cut out and all reactor banks have been put in, exit this round of reactive loss regulation operation; if the reactive power of the 220kV transformer is less than zero, withdraw this switching operation and exit this round of reactive loss regulation operation at the same time.

[0102] Step 25: If the power factor of the 220 kV transformer is greater than or equal to the lower limit of the first preset factor range, the 220 kV transformer and the 220 kV bus do not need to perform linkage voltage regulation.

[0103] Step 26: If the reactive power of the 220kV transformer does not meet the first preset condition, that is, the reactive power of the 220kV transformer is less than zero, a reactor group is cut out on the 220kV bus, or a capacitor group is put in. If after this switching operation, the reactive power of the 220kV transformer is greater than or equal to zero, or the 550kV bus voltage is within the first preset voltage range, or the reactor groups have all been cut out and the capacitor groups have all been put in, exit this round of reactive loss adjustment operation.

[0104] After this round of reactive loss regulation operation is completed, if the 550kV bus voltage is still lower than the first preset voltage range, the lower limit of the first preset factor range is lowered (for example, the lower limit of the first preset factor range can be lowered by 3%). If the lower limit of the first preset factor range does not meet the preset lower limit condition (for example, the lower limit is less than 0.85) after lowering the lower limit, then this voltage regulation is terminated, otherwise, the next round of reactive loss regulation operation is continued. If the 550kV bus voltage is within the first preset voltage range, or the transformation ratio of the transformers of all other levels of substations cannot be adjusted to the qualified range for the lower bus voltage connected to any transformer, then this voltage regulation is terminated, otherwise, the next round of reactive loss regulation operation is continued.

[0105] In these embodiments, when the voltage of the busbar of the highest voltage level exceeds or is lower than the first preset range, by starting the linkage voltage regulation of at least one other level substation associated with the busbar of the highest voltage level, while ensuring that the voltages of each busbar under the substations of other levels are qualified, the voltage regulation of the busbar of the highest voltage level is assisted and adjusted so that the voltage of the busbar of the highest voltage level is also adjusted to the qualified range.

[0106] In some implementations of these embodiments, performing a first voltage regulation through a bus with a highest voltage level includes:

[0107] The first voltage regulation is performed by switching on at least one capacitor group or reactor group on the busbar with the highest voltage level.

[0108] Specifically, the first voltage regulation is performed by switching on at least one capacitor group or reactor group on the busbar with the highest voltage level, including:

[0109] If the voltage of the busbar with the highest voltage level is higher than the first preset voltage range, at least one capacitor group existing on the busbar with the highest voltage level is disconnected, and / or at least one reactor group is added to the busbar with the highest voltage level;

[0110] If the voltage of the busbar with the highest voltage level is lower than the first preset voltage range, at least one existing reactor group on the busbar with the highest voltage level is cut out, and / or at least one capacitor group is added to the busbar with the highest voltage level.

[0111] As an example, if the voltage of a 550kV bus (the highest voltage level bus) is higher than a first preset voltage range, and if multiple capacitor groups have been put into operation on the 550kV bus, the capacitor groups are cut out one by one until no capacitor groups can be cut out, or the voltage of the 550kV bus is within the first preset voltage range.

[0112] If there are multiple reactor groups that can be put into operation on the 550kV bus, the reactor groups are put into operation one by one until there are no more reactor groups that can be put into operation or the 550kV bus voltage is within the first preset voltage range.

[0113] If the voltage of the 550kV bus is lower than the first preset voltage range, if multiple reactor groups have been put into operation on the 550kV bus, the reactor groups are cut out one by one until no reactor group can be cut out or the voltage of the 550kV bus is within the first preset voltage range.

[0114] If there are multiple capacitor groups available for use on the 550 kV bus, the capacitor groups are put into use one by one until no more capacitor groups are available for use or the 550 kV bus voltage is within the first preset voltage range.

[0115] In these implementations, the voltage regulation strategy of the substation is preferentially executed by switching on the reactive compensation module on the busbar of the highest voltage level, and the voltage of the busbar of the highest voltage level is regulated to within the first preset voltage range. When the voltage regulation strategy of the substation is executed, if it is still impossible to ensure that the voltage of the busbar of the highest voltage level is within the qualified range, the linkage voltage regulation of the associated substations of other levels is started, so as to regulate the voltage of the busbar in the power grid system in the fastest time and with the least impact on other busbars in the power grid system.

[0116] It should be noted that in these implementations, when switching the reactive compensation modules, the defective or overhauled reactive compensation modules are not switched.

[0117] Figure 2 This is a schematic diagram of the structure of the voltage regulator provided in the present application. The voltage regulator is applied to a multi-stage substation, and the multi-stage substation includes a busbar and a transformer respectively; Figure 2 As shown, the voltage regulating device 20 provided in this embodiment includes:

[0118] A first regulating module 201, configured to perform a first voltage regulation through the bus of the highest voltage level in response to the voltage of the bus of the highest voltage level not satisfying a first preset voltage range;

[0119] The second regulation module 202 is used to adjust the reactive power loss of at least one other level substation according to the power factor of the transformer of at least one other level substation in response to the voltage of the highest voltage level bus obtained by the first voltage regulation result not meeting the first preset voltage range, so as to adjust the voltage of the highest voltage level bus to within the first preset voltage range.

[0120] In some embodiments, the second adjustment module 202 is further configured to:

[0121] For each other level substation of at least one other level substation, the following reactive power loss regulation operation is performed:

[0122] Maintaining the bus voltage of the substation of the other level within the corresponding second preset voltage range, or adjusting the bus voltage of the substation of the other level to the second preset voltage range;

[0123] If the reactive power of the transformer of the other level substation meets the first preset condition, and it is determined that the power factor of the transformer is less than the lower limit of the first preset factor range, a reactive compensation module is switched on and off on the busbar of the other level substation to perform a second voltage regulation corresponding to the other level substation;

[0124] If, after the second voltage adjustment of each substation of other levels, it is determined that the voltage of the busbar of the highest voltage level meets the first preset voltage range, the reactive loss adjustment operation is stopped;

[0125] Otherwise, the lower limit of the first preset factor range is reduced, and the reactive power loss adjustment operation is repeatedly performed until the second preset condition is met.

[0126] In some implementations of these embodiments, the second adjustment module 202 is further configured to:

[0127] In response to determining that the reactive power of the transformer of the other level substation does not meet the first preset condition, a reactive compensation module is switched on the busbar of the other level substation.

[0128] In some implementations of these embodiments, the second preset condition includes at least one of the following:

[0129] Adjusting the voltage of the busbar with the highest voltage level to a first preset voltage range through a reactive loss adjustment operation;

[0130] After lowering the lower limit of the first preset factor range, the lower limit of the first preset factor range does not meet the preset lower limit condition;

[0131] The transformation ratio adjustment of the transformer cannot ensure that the bus voltage of other levels of substations is within the second preset voltage range.

[0132] In some implementations of these embodiments, the second adjustment module 202 is further configured to:

[0133] In response to detecting that the bus voltage of the other level substation is not within the second preset voltage range, the transformation ratio of the transformer of the other level substation is adjusted to adjust the bus voltage of the other level substation to within the second preset voltage range.

[0134] In some implementations of these embodiments, the reactive power compensation module includes a capacitor group and a reactor group.

[0135] In some implementations of these embodiments, the first adjustment module 201 is further configured to:

[0136] The first voltage regulation is performed by switching on at least one capacitor group or reactor group on the busbar with the highest voltage level.

[0137] In some implementations of these embodiments, the first adjustment module 201 is further configured to:

[0138] If the voltage of the busbar with the highest voltage level is higher than the first preset voltage range, at least one capacitor group existing on the busbar with the highest voltage level is disconnected, and / or at least one reactor group is added to the busbar with the highest voltage level;

[0139] If the voltage of the busbar with the highest voltage level is lower than the first preset voltage range, at least one existing reactor group on the busbar with the highest voltage level is cut out, and / or at least one capacitor group is added to the busbar with the highest voltage level.

[0140] The voltage regulating device provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be described in detail here.

[0141] Figure 3This is a schematic diagram of the structure of the voltage regulation device provided in this application. Figure 3 As shown, the electronic device 30 provided in this embodiment includes: at least one processor 301 and a memory 302. Optionally, the device 30 also includes a communication component 303. The processor 301, the memory 302 and the communication component 303 are connected via a bus 304.

[0142] In a specific implementation process, at least one processor 301 executes the computer-executable instructions stored in the memory 302, so that at least one processor 301 executes the above method.

[0143] The specific implementation process of the processor 301 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0144] In the above embodiments, it should be understood that the processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the invention can be directly implemented as a hardware processor, or can be implemented by a combination of hardware and software modules in the processor.

[0145] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk storage.

[0146] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

[0147] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0148] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0149] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0150] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0151] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0152] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0153] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0154] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0155] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0156] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A voltage regulation method, applied to a multi-level substation, wherein the multi-level substation comprises a busbar and a transformer respectively; the method comprises: In response to the voltage of the busbar with the highest voltage level not satisfying the first preset voltage range, performing a first voltage adjustment through the busbar with the highest voltage level; In response to the fact that the voltage of the highest voltage level bus obtained by the first voltage regulation result does not satisfy the first preset voltage range, the reactive loss of the at least one other level substation is adjusted according to the power factor of the transformer of at least one other level substation to adjust the voltage of the highest voltage level bus to within the first preset voltage range.

2. The method according to claim 1, characterized in that The step of adjusting the reactive power loss of at least one other level substation according to the power factor of the transformer of at least one other level substation comprises: For each of the at least one other level substation, the following reactive power loss adjustment operation is performed: Maintaining the bus voltage of the substation of the other level within the corresponding second preset voltage range, or adjusting the bus voltage of the substation of the other level to the second preset voltage range; If the reactive power of the transformer of the other level substation meets the first preset condition, and it is determined that the power factor of the transformer is less than the lower limit of the first preset factor range, a reactive compensation module is switched on and off on the busbar of the other level substation to perform a second voltage regulation corresponding to the other level substation; If, after the second voltage adjustment of each of the substations of other levels, it is determined that the voltage of the busbar of the highest voltage level meets the first preset voltage range, the reactive loss adjustment operation is stopped; Otherwise, the lower limit of the first preset factor range is reduced, and the reactive loss adjustment operation is repeatedly performed until a second preset condition is met.

3. The method according to claim 2, characterized in that The method further includes: in response to determining that the reactive power of the transformer of the other level substation does not meet the first preset condition, switching on a reactive compensation module on a busbar of the other level substation.

4. The method according to claim 2, characterized in that: The second preset condition includes at least one of the following: By means of the reactive loss adjustment operation, the voltage of the busbar with the highest voltage level is adjusted to the first preset voltage range; After lowering the lower limit of the first preset factor range, the lower limit of the first preset factor range does not meet the preset lower limit condition; The transformation ratio adjustment of the transformer cannot ensure that the bus voltage of other levels of substations is within the second preset voltage range.

5. The method according to claim 2, characterized in that: The step of adjusting the bus voltage of the substation of another level to the second preset voltage range includes: In response to detecting that the bus voltage of the other level substation is not within the second preset voltage range, the transformation ratio of the transformer of the other level substation is adjusted to adjust the bus voltage of the other level substation to within the second preset voltage range.

6. The method according to any one of claims 2 to 5, characterized in that: The reactive power compensation module includes a capacitor group and a reactor group.

7. The method according to claim 6, characterized in that The first voltage regulation is performed through the bus with the highest voltage level, including: The first voltage regulation is performed by switching on at least one capacitor group or reactor group on the busbar with the highest voltage level.

8. The method according to claim 7, characterized in that The first voltage regulation is performed by switching on at least one capacitor group or reactor group on the busbar with the highest voltage level, including: If the voltage of the busbar with the highest voltage level is higher than the first preset voltage range, at least one capacitor group existing on the busbar with the highest voltage level is cut out, and / or at least one reactor group is added to the busbar with the highest voltage level; If the voltage of the busbar with the highest voltage level is lower than the first preset voltage range, at least one existing reactor group on the busbar with the highest voltage level is cut out, and / or at least one capacitor group is added to the busbar with the highest voltage level.

9. A voltage regulating device, applied to a multi-level substation, wherein the multi-level substation comprises a busbar and a transformer respectively; the device comprises: A first regulating module, configured to perform a first voltage regulation through the bus of the highest voltage level in response to the voltage of the bus of the highest voltage level not satisfying a first preset voltage range; A second regulation module is used for adjusting the reactive loss of at least one other level substation according to the power factor of the transformer of at least one other level substation in response to the voltage of the highest voltage level bus obtained by the first voltage regulation result not satisfying the first preset voltage range, so as to adjust the voltage of the highest voltage level bus to within the first preset voltage range.

10. A voltage regulating device, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 8 when executed by a processor.

12. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 8 when being executed by a processor.

Images