A method of reactive power compensation configuration

Abstract

The embodiment of the application discloses a kind of reactive compensation configuration methods, comprising: calculating the reactive loss and charging power of line in target subject, and calculating the reactive loss of transformer in target subject, obtain the active power and power factor of charge-discharge of energy storage converter in energy storage power station, to calculate the regulating power of energy storage converter in energy storage power station, then according to the regulating power of all energy storage converters in energy storage power station, the reactive loss and charging power of all lines in target subject, and the reactive loss of all transformers in target subject, calculate reactive compensation configuration capacity, finally by equal adjustment the power factor of all energy storage converters in energy storage power station, so that reactive compensation configuration capacity reaches minimum, and the minimum reactive compensation configuration capacity is as the capacity of reactive compensation device that needs to be configured, wherein target subject includes wind power station and energy storage power station;It reduces reactive compensation configuration, reduces cost, and can effectively suppress the power fluctuation of wind power station.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power systems, and particularly relates to a reactive power compensation configuration method. BACKGROUND

[0002] When the wind power station is in operation, the dependence on reactive power is quite high. With the continuous expansion of the scale and capacity of wind power grid connection, if appropriate reactive power compensation measures are not taken, the reactive power deficiency of the power system will be aggravated, and the impact on the voltage of the power system will also be continuously enhanced, thereby bringing a major threat to the safe and stable operation of the power grid. Therefore, in order to reduce the influence of wind power grid connection on the power system and improve the stability of the wind power station connected to the power system, it is an urgent need to optimize the reactive power compensation of the wind power station connected to the power system.

[0003] At present, the main problems of the reactive power compensation configuration of the wind power station include that the reactive power compensation configuration is large, the cost is high, and it is difficult to suppress the power fluctuation of the wind power station. SUMMARY

[0004] Therefore, it is necessary to propose a reactive power compensation configuration method aiming at the above problems, which can reduce the reactive power compensation configuration, reduce the cost, effectively suppress the power fluctuation of the wind power station, improve the voltage level of the wind power station, improve the stability and safety of wind power grid connection, and improve the yield of the energy storage power station.

[0005] To achieve the above purpose, the present application provides a reactive power compensation configuration method in the first aspect, which comprises:

[0006] calculating the reactive power loss and charging power of the lines in the target subject, and calculating the reactive power loss of the transformers in the target subject;

[0007] obtaining the charging and discharging active power and power factor of the energy storage converters in the energy storage power station, so as to calculate the regulation power of the energy storage converters in the energy storage power station;

[0008] calculating the reactive power compensation configuration capacity according to the regulation power of all the energy storage converters in the energy storage power station, the reactive power loss and charging power of all the lines in the target subject, and the reactive power loss of all the transformers in the target subject;

[0009] obtaining the power factor regulation range of the energy storage converters in the energy storage power station, and adjusting the power factor of all the energy storage converters in the energy storage power station according to the power factor regulation range of the energy storage converters in the energy storage power station, so that the reactive power compensation configuration capacity is minimized, and the minimum reactive power compensation configuration capacity is taken as the capacity of the reactive power compensation device to be configured;

[0010] The target subject comprises the wind power station and the energy storage power station.

[0011] Optionally, the reactive loss of the line in the target subject is calculated, comprising:

[0012] The line voltage, active power, reactive power and line reactance of the line in the target subject are obtained.

[0013] The reactive loss of the line in the target subject is calculated according to the line voltage, active power, reactive power and line reactance of the line in the target subject.

[0014] Optionally, the charging power of the line in the target subject is calculated, comprising:

[0015] The line voltage, angular frequency and ground capacitance of the line in the target subject are obtained.

[0016] The charging power of the line in the target subject is calculated according to the line voltage, angular frequency and ground capacitance of the line in the target subject.

[0017] Optionally, the reactive loss of the transformer in the target subject is calculated, comprising:

[0018] The high-voltage side voltage, active power, reactive power, rated capacity, no-load current percentage and named value of transformer reactance of the transformer in the target subject are obtained.

[0019] The reactive loss of the transformer in the target subject is calculated according to the high-voltage side voltage, active power, reactive power, rated capacity, no-load current percentage and named value of transformer reactance of the transformer in the target subject.

[0020] Optionally, the reactive compensation configuration capacity is calculated according to the regulation power of all energy storage converters in the energy storage power station, the reactive loss and charging power of all lines in the target subject, and the reactive loss of all transformers in the target subject, comprising:

[0021] The capacitive reactive compensation configuration capacity is calculated according to the regulation power of all energy storage converters in the energy storage power station and the charging power of all lines in the target subject.

[0022] The inductive reactive compensation configuration capacity is calculated according to the regulation power of all energy storage converters in the energy storage power station, the reactive loss of all lines in the target subject and the reactive loss of all transformers in the target subject.

[0023] The capacitive reactive compensation configuration capacity to the inductive reactive compensation configuration capacity is taken as the reactive compensation configuration capacity.

[0024] Optionally, the regulation power of the energy storage converter in the energy storage power station is calculated, comprising:

[0025] calculating the regulating power of the energy storage converter in the energy storage power station by using the formula

[0026] wherein, is the regulating power of the energy storage converter in the energy storage power station, is the charging and discharging active power of the energy storage converter in the energy storage power station, is the power factor of the energy storage converter in the energy storage power station.

[0027] Optionally, the calculation of the reactive loss of the line in the target subject according to the line voltage, the active power, the reactive power and the line reactance of the line in the target subject comprises:

[0028] calculating the reactive loss of the line in the target subject by using the formula

[0029] wherein, is the reactive loss of the line in the target subject, is the line reactance of the line in the target subject, is the active power of the line in the target subject, is the reactive power of the line in the target subject, is the line voltage of the line in the target subject.

[0030] Optionally, the calculation of the charging power of the line in the target subject according to the line voltage, the angular frequency and the ground capacitance of the line in the target subject comprises:

[0031] calculating the charging power of the line in the target subject by using the formula

[0032] wherein, is the charging power of the line in the target subject, is the line voltage of the line in the target subject, is the angular frequency of the line in the target subject, is the ground capacitance of the line in the target subject.

[0033] Optionally, the calculation of the reactive loss of the transformer in the target subject according to the high-voltage side voltage, the active power, the reactive power, the rated capacity, the no-load current percentage and the named value of the transformer reactance of the transformer in the target subject comprises:

[0034] calculating the reactive loss of the transformer in the target subject by using the formula

[0035] wherein, is the reactive loss of the transformer in the target subject,​​​​ a nominal value of transformer reactance of a transformer in the target subject, an active power of an i-th transformer in the target subject, a reactive power of a transformer in the target subject, a high-voltage side voltage of a transformer in the target subject, a no-load current percentage of a transformer in the target subject, a rated capacity of a transformer in the target subject.

[0036] Optionally, the calculation of the capacitive reactive compensation configuration capacity according to the regulation power of all energy storage converters in the energy storage power station and the charging power of all lines in the target subject comprises:

[0037] the capacitive reactive compensation configuration capacity is calculated by using the formula

[0038] The calculation of the inductive reactive compensation configuration capacity according to the regulation power of all energy storage converters in the energy storage power station, the reactive loss of all lines in the target subject and the reactive loss of all transformers in the target subject comprises:

[0039] the inductive reactive compensation configuration capacity is calculated by using the formula

[0040] wherein, ;

[0041] In the above formula, the capacitive reactive compensation configuration capacity, the sum of the regulation power of all energy storage converters in the energy storage power station, the sum of the reactive loss of all energy storage collection lines and all energy storage access lines in the energy storage power station, the sum of the reactive loss of all energy storage step-up transformers in the energy storage power station, the sum of the reactive loss of all wind power collection lines, all wind power submarine cable transmission lines and all wind power land transmission lines in the wind power station, the sum of the reactive loss of all wind power unit transformer and all wind power step-up transformers in the wind power station, the inductive reactive compensation configuration capacity, the sum of the charging power of all energy storage collection lines and all energy storage access lines in the energy storage power station, the sum of the charging power of all wind power collection lines, all wind power submarine cable transmission lines and all wind power land transmission lines in the wind power station, ​​a sum of charging power of all wind power cable outgoing lines and all wind power land outgoing lines in the wind power station, a regulating power of the first energy storage converter in the energy storage power station, a regulating power of the first energy storage converter in the energy storage power station, a reactive loss of the first energy storage access line in the energy storage power station, a reactive loss of the first energy storage step-up transformer in the energy storage power station, a reactive loss of the first wind power collection line in the wind power station, a reactive loss of the first wind power cable outgoing line in the wind power station, a reactive loss of the first wind power land outgoing line in the wind power station, a reactive loss of the first wind power unit transformer in the wind power station, a reactive loss of the first wind power step-up transformer in the wind power station, a charging power of the first energy storage collection line in the energy storage power station, a charging power of the first energy storage access line in the energy storage power station, a charging power of the first wind power collection line in the wind power station, a charging power of the first wind power cable outgoing line in the wind power station, a charging power of the first wind power land outgoing line in the wind power station.

[0042] To achieve the above object, the present application provides, in a second aspect, a reactive compensation configuration device, which comprises:

[0043] a reactive loss and charging power calculation module for calculating the reactive loss and charging power of lines in a target subject and calculating the reactive loss of transformers in the target subject;

[0044] a regulating power calculation module for obtaining the charging and discharging active power and power factor of energy storage converters in an energy storage power station to calculate the regulating power of the energy storage converters in the energy storage power station;

[0045] The reactive power compensation calculation module is configured to calculate a reactive power compensation configuration capacity according to the regulation power of all the energy storage converters in the energy storage power station, the reactive power loss and charging power of all the lines in the target subject, and the reactive power loss of all the transformers in the target subject.

[0046] The adjustment module is configured to obtain a power factor adjustment range of the energy storage converters in the energy storage power station, and adjust the power factor of all the energy storage converters in the energy storage power station according to the power factor adjustment range of the energy storage converters in the energy storage power station, so that the reactive power compensation configuration capacity is minimized, and the minimum reactive power compensation configuration capacity is taken as the capacity of the reactive power compensation device to be configured.

[0047] The target subject includes a wind power station and the energy storage power station.

[0048] To achieve the above object, the present application provides, in a third aspect, a computer readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the method according to any one of the first aspect.

[0049] To achieve the above object, the present application provides, in a fourth aspect, a computer device comprising a memory and a processor, wherein the memory stores a computer program, which, when executed by the processor, causes the processor to perform the method according to any one of the first aspect.

[0050] The embodiment of the present application has the following beneficial effects: the method calculates the reactive power loss and charging power of the lines in the target subject, and the reactive power loss of the transformers in the target subject; then the active power and power factor of the charge-discharge of the energy storage converters in the energy storage power station are obtained to calculate the regulation power of the energy storage converters in the energy storage power station, and then the regulation power of all the energy storage converters in the energy storage power station, the reactive power loss and charging power of all the lines in the target subject, and the reactive power loss of all the transformers in the target subject are used to calculate the reactive compensation configuration capacity; finally, the power factor regulation range of the energy storage converters in the energy storage power station is obtained, and the power factor of all the energy storage converters in the energy storage power station is adjusted according to the power factor regulation range of the energy storage converters in the energy storage power station, so that the reactive compensation configuration capacity is minimized, and the minimum reactive compensation configuration capacity is used as the capacity of the reactive compensation device to be configured, wherein the target subject includes the wind power station and the energy storage power station; that is, by using the energy storage power station matched with the wind power station, considering the reactive compensation provided by the energy storage power station, and adjusting the power factor of the energy storage converters in the energy storage power station, the reactive compensation configuration capacity is minimized, thereby reducing the reactive compensation configuration and reducing the cost; in addition, by participating in the reactive power regulation of the wind power station, the power fluctuation of the wind power station can be effectively suppressed, the voltage level of the wind power station can be improved, the stability and safety of the wind power grid connection can be improved, and the yield of the energy storage power station can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0052] Among them:

[0053] Figure 1 It is a topological schematic diagram of the wind power station and the energy storage power station matched with the wind power station in the embodiment of the present application;

[0054] Figure 2 It is a schematic diagram of a reactive compensation configuration method in the embodiment of the present application;

[0055] Figure 3 It is a schematic diagram of a reactive compensation configuration device in the embodiment of the present application;

[0056] Figure 4 It is an internal structure diagram of a computer device in some embodiments. DETAILED DESCRIPTION

[0057] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.

[0058] When the wind power station is running, the dependence on reactive power is quite high. With the continuous expansion of the scale and capacity of wind power grid connection, if appropriate reactive power compensation measures are not taken, the reactive power shortage of the power system will be aggravated, and the impact on the voltage of the power system will also be continuously enhanced, thereby bringing a major threat to the safe and stable operation of the power grid. Therefore, in order to reduce the influence of wind power grid connection on the power system and improve the stability of the wind power station connected to the power system, it is an urgent need to optimize the reactive power compensation of the wind power station connected to the power system.

[0059] At present, the main problems of the reactive power compensation configuration of the wind power station include that the reactive power compensation configuration is large, the cost is high, and it is difficult to suppress the power fluctuation of the wind power station.

[0060] In view of the above problems, the present application provides a reactive power compensation configuration method, which can reduce the reactive power compensation configuration, reduce the cost, effectively suppress the power fluctuation of the wind power station, improve the voltage level of the wind power station, improve the stability and safety of wind power grid connection, and improve the yield of the energy storage power station, and the specific implementation principle will be described in detail in the embodiments below.

[0061] In order to facilitate the detailed description of the embodiments of the present application below, the present application first provides a topological diagram of the wind power station and the energy storage power station matched with the wind power station, so that the contents in the embodiments of the present application can be better understood with the help of the diagram; please refer to Figure 1 The topological diagram of the wind power station and the energy storage power station matched with the wind power station in the embodiments of the present application is shown, the wind power station is connected to the power grid, the wind power station includes a line, a transformer and a wind turbine, wherein the line includes a land transmission line, a submarine cable transmission line and a wind power collection line, the transformer includes a wind power step-up transformer and a wind turbine unit transformer (i.e. a box-type transformer); the energy storage power station matched with the wind power station includes a line, a transformer, an energy storage converter and an energy storage group, wherein the line includes an energy storage access line and an energy storage collection line, and the transformer includes an energy storage step-up transformer.

[0062] Please refer to Figure 2 The schematic diagram of the reactive power compensation configuration method in the embodiments of the present application is shown, the method comprises:

[0063] Step 210: Calculate the reactive loss and charging power of the line in the target subject, and calculate the reactive loss of the transformer in the target subject.

[0064] In some embodiments, the line voltage, active power, reactive power and line parameters of the line in the target subject can be acquired, and then the reactive loss and charging power of the line in the target subject are calculated according to the line voltage, active power, reactive power and line parameters of the line in the target subject, and the high-voltage side voltage, active power, reactive power and transformer parameters of the transformer in the target subject are acquired; the reactive loss of the transformer in the target subject is calculated according to the high-voltage side voltage, active power, reactive power and transformer parameters of the transformer in the target subject; of course, in other embodiments, only the line voltage, active power and line parameters of the line in the target subject can be acquired, and then the reactive loss and charging power of the line in the target subject are calculated according to the line voltage, active power and line parameters of the line in the target subject.

[0065] The target subject of the present application includes a wind power station and an energy storage station, and in some embodiments, the target subject includes a wind power station and an energy storage station, and the target subject includes a wind power station and an energy storage station. Figure 1 The lines and transformers shown are examples, and the lines include land transmission lines, sea cable transmission lines and wind power collection lines of the wind power station, and energy storage access lines and energy storage collection lines of the energy storage station, and the reactive loss and charging power of the line in the target subject include the reactive loss and charging power of the land transmission line, the reactive loss and charging power of the sea cable transmission line, the reactive loss and charging power of the wind power collection line in the wind power station, and the reactive loss and charging power of the energy storage access line and the energy storage collection line in the energy storage station; the transformer includes a wind power step-up transformer and a wind turbine unit transformer of the wind power station, and an energy storage step-up transformer of the energy storage station, and the reactive loss of the transformer in the target subject includes the reactive loss of the wind power step-up transformer, the reactive loss of the wind turbine unit transformer in the wind power station, and the reactive loss of the energy storage step-up transformer in the energy storage station.

[0066] Step 220: Acquire the charging and discharging active power and power factor of the energy storage converter in the energy storage station to calculate the regulating power of the energy storage converter in the energy storage station.

[0067] It should be noted that the charging active power of the energy storage converter in the energy storage power station refers to the actual working power provided when the electrical energy is transmitted from the outside (such as a wind power station, a power grid, etc.) to the energy storage group for charging, that is, the energy that can be truly converted into useful work in the charging process. The discharging active power of the energy storage converter in the energy storage power station refers to the actual working power provided by the energy storage converter when the electrical energy is released from the energy storage group to the outside. The power factor of the energy storage converter in the energy storage power station refers to the relationship between the active power and the reactive power provided by the energy storage converter to the outside in the energy storage system; wherein the power factor can be positive, negative or zero.

[0068] In some embodiments, the regulating power of the energy storage converter in the energy storage power station can be calculated according to the charging and discharging active power and the power factor of the energy storage converter in the energy storage power station; wherein the regulating power of the energy storage converter in the energy storage power station has a correlation with the power factor, that is, the regulating power of the energy storage converter in the energy storage power station can also be positive, negative or zero.

[0069] Step 230: calculating the reactive compensation configuration capacity according to the regulating power of all energy storage converters in the energy storage power station, the reactive loss and the charging power of all lines in the target subject, and the reactive loss of all transformers in the target subject.

[0070] Step 240: obtaining the power factor regulating range of the energy storage converter in the energy storage power station, and adjusting the power factor of all energy storage converters in the energy storage power station equally according to the power factor regulating range of the energy storage converter in the energy storage power station, so that the reactive compensation configuration capacity reaches the minimum, and the minimum reactive compensation configuration capacity is taken as the capacity of the reactive compensation device to be configured.

[0071] Wherein, the power factor regulating range of the energy storage converter in the energy storage power station is a parameter that the energy storage converter has by itself, and is specific to the capacity, topology structure, control strategy and input and output power level of the energy storage converter, etc.; in some embodiments, the power factor regulating range of the energy storage converter in the energy storage power station can be -0.95 to 0.95, wherein the values below 0 are capacitive, and the values above 0 are inductive, that is, it can be understood that the reactive compensation configuration capacity of the present application includes the capacitive reactive compensation configuration capacity and the inductive reactive compensation configuration capacity.

[0072] It should be noted that, since the regulating power of the energy storage converter in the energy storage power station has a correlation with the power factor, the regulating power in the energy storage converter can be changed by adjusting the power factor of the energy storage converter, so that the reactive compensation configuration capacity reaches the minimum, and then the minimum reactive compensation configuration capacity is taken as the capacity of the reactive compensation device to be configured, so as to determine the capacity of the reactive compensation device to be configured in the wind power station (the capacity of the reactive compensation device includes the capacitive reactive compensation configuration capacity to the inductive reactive compensation configuration capacity, as in the above embodiments).

[0073] It should be further explained that, since the power of all energy storage converters in the energy storage power station needs to be consistent, i.e., the power factor of all energy storage converters in the energy storage power station needs to be consistent, so as to ensure that the energy storage converters in the energy storage power station will not cause fire accidents and other accidents due to inconsistent power, it is necessary to equally adjust the power factor of all energy storage converters in the energy storage power station. Of course, if the fire accidents and other accidents are not considered, in some embodiments, the power factor adjustment range of the i th energy storage converter in the energy storage power station can also be obtained, and the power factor of the i th energy storage converter in the energy storage power station is adjusted according to the power factor adjustment range of the i th energy storage converter in the energy storage power station. The above steps are repeated, i is an integer greater than 0, so that the minimum reactive power compensation configuration capacity is obtained, and the minimum reactive power compensation configuration capacity is taken as the capacity of the reactive power compensation device to be configured.

[0074] In the embodiments of the present application, the reactive power loss and the charging power of the lines in the target subject are calculated, and the reactive power loss of the transformers in the target subject is calculated. Then the charging and discharging active power and the power factor of the energy storage converters in the energy storage power station are obtained to calculate the adjustment power of the energy storage converters in the energy storage power station. Then, according to the adjustment power of all energy storage converters in the energy storage power station, the reactive power loss and the charging power of all lines in the target subject, and the reactive power loss of all transformers in the target subject, the reactive power compensation configuration capacity is calculated. Finally, the power factor adjustment range of the energy storage converters in the energy storage power station is obtained, and the power factor of all energy storage converters in the energy storage power station is equally adjusted according to the power factor adjustment range of the energy storage converters in the energy storage power station, so that the minimum reactive power compensation configuration capacity is obtained, and the minimum reactive power compensation configuration capacity is taken as the capacity of the reactive power compensation device to be configured. The target subject includes a wind power station and an energy storage power station. That is, by using the energy storage power station matched with the wind power station, considering the reactive power compensation that the energy storage power station can provide, and adjusting the power factor of the energy storage converters in the energy storage power station, the minimum reactive power compensation configuration capacity is obtained, so as to reduce the reactive power compensation configuration and reduce the cost. In addition, by participating in the reactive power regulation of the wind power station through the energy storage power station, not only the power fluctuation of the wind power station can be effectively suppressed, but also the voltage level of the wind power station can be improved, the stability and safety of the wind power grid connection can be improved, and the yield of the energy storage power station can be improved.

[0075] In a feasible implementation manner, the step 210 in the above embodiment, the calculation of the reactive power loss of the lines in the target subject, includes: obtaining the line voltage, active power, reactive power and line reactance of the lines in the target subject; and calculating the reactive power loss of the lines in the target subject according to the line voltage, active power, reactive power and line reactance of the lines in the target subject.

[0076] In the embodiments of the present application, the reactive power loss of the line in the target subject can be calculated according to the line voltage, the active power, the reactive power and the line reactance of the line in the target subject, so that the accuracy and reliability of the calculation of the reactive power loss of the line in the wind power plant and the energy storage power plant can be improved.

[0077] In a feasible implementation, the step 210 in the above embodiment, the charging power of the line in the target subject is calculated, including: obtaining the line voltage, the angular frequency and the ground capacitance of the line in the target subject; and calculating the charging power of the line in the target subject according to the line voltage, the angular frequency and the ground capacitance of the line in the target subject.

[0078] In the embodiments of the present application, the charging power of the line in the target subject can be calculated according to the line voltage, the angular frequency and the ground capacitance of the line in the target subject, so that the accuracy and reliability of the calculation of the charging power of the line in the wind power plant and the energy storage power plant can be improved.

[0079] In a feasible implementation, the step 210 in the above embodiment, the reactive power loss of the transformer in the target subject is calculated, including: obtaining the high-voltage side voltage, the active power, the reactive power, the rated capacity, the no-load current percentage and the named value of the transformer reactance of the transformer in the target subject; and calculating the reactive power loss of the transformer in the target subject according to the high-voltage side voltage, the active power, the reactive power, the rated capacity, the no-load current percentage and the named value of the transformer reactance of the transformer in the target subject.

[0080] In the embodiments of the present application, the charging power of the line in the target subject can be calculated according to the line voltage, the angular frequency and the ground capacitance of the line in the target subject, so that the accuracy and reliability of the calculation of the charging power of the line in the wind power plant and the energy storage power plant can be improved.

[0081] In a feasible implementation, the step 230 in the above embodiment, the reactive compensation configuration capacity is calculated according to the regulation power of all the energy storage converters in the energy storage power plant, the reactive power loss and the charging power of all the lines in the target subject, and the reactive power loss of all the transformers in the target subject, including: calculating the capacitive reactive compensation configuration capacity according to the regulation power of all the energy storage converters in the energy storage power plant and the charging power of all the lines in the target subject; calculating the inductive reactive compensation configuration capacity according to the regulation power of all the energy storage converters in the energy storage power plant, the reactive power loss of all the lines in the target subject and the reactive power loss of all the transformers in the target subject; and taking the capacitive reactive compensation configuration capacity to the inductive reactive compensation configuration capacity as the reactive compensation configuration capacity.

[0082] In the embodiments of the present application, the capacitive reactive compensation configuration capacity can be obtained more accurately by calculating the capacitive reactive compensation configuration capacity according to the regulation power of all energy storage converters in the energy storage power station and the charging power of all lines in the target subject; the inductive reactive compensation configuration capacity can be obtained more accurately by calculating the inductive reactive compensation configuration capacity according to the regulation power of all energy storage converters in the energy storage power station, the reactive loss of all lines in the target subject and the reactive loss of all transformers in the target subject; and the regulation power of all energy storage converters in the energy storage power station is used for regulating both the capacitive reactive compensation configuration capacity and the inductive reactive compensation configuration capacity, so that the capacitive reactive compensation configuration capacity and the inductive reactive compensation configuration capacity can be minimized, and thus the required reactive compensation configuration capacity can be minimized to reduce the reactive compensation configuration and reduce the cost.

[0083] In a feasible implementation manner, the step 220 in the above embodiment, the regulation power of the energy storage converter in the energy storage power station is calculated, including:

[0084] The regulation power of the energy storage converter in the energy storage power station is calculated by using the formula

[0085] Wherein, is the regulation power of the energy storage converter in the energy storage power station, is the charging and discharging active power of the energy storage converter in the energy storage power station, is the power factor of the energy storage converter in the energy storage power station.

[0086] In the embodiments of the present application, the calculation formula of the regulation power of the energy storage converter is provided from the mathematical point of view, and the accuracy of the calculated regulation power of the energy storage converter can be ensured from the mathematical logic rigor, and the calculation formula of the regulation power of the energy storage converter is preferably shown to facilitate the technical personnel to provide reference, understanding and calculation.

[0087] In a feasible implementation manner, the reactive loss of the line in the target subject is calculated according to the line voltage, the active power, the reactive power and the line reactance of the line in the target subject in the above embodiment, including:

[0088] The reactive loss of the line in the target subject is calculated by using the formula

[0089] Wherein, is the reactive loss of the line in the target subject, is the line reactance of the line in the target subject, is the active power of the line in the target subject, is the reactive power of the line in the target subject, is the line voltage of the line in the target subject. ​​

[0090] In the embodiments of the present application, the rigorous calculation formula of the reactive power loss of the line is provided from the mathematical point of view, the accuracy of the calculated reactive power loss of the line can be ensured from the rigor of the mathematical logic, and the preferred calculation formula of the reactive power loss of the line is shown so as to provide the reference, understanding and calculation for the technical personnel.

[0091] In a feasible implementation, the calculation of the charging power of the line in the target subject according to the line voltage, the angular frequency and the ground capacitance of the line in the target subject in the above-mentioned embodiments comprises:

[0092] The charging power of the line in the target subject is calculated by using the formula

[0093] Wherein, is the charging power of the line in the target subject, is the line voltage of the line in the target subject, is the angular frequency of the line in the target subject, is the ground capacitance of the line in the target subject.

[0094] In the embodiments of the present application, the rigorous calculation formula of the charging power of the line is provided from the mathematical point of view, the accuracy of the calculated charging power of the line can be ensured from the rigor of the mathematical logic, and the preferred calculation formula of the charging power of the line is shown so as to provide the reference, understanding and calculation for the technical personnel.

[0095] In a feasible implementation, the calculation of the reactive power loss of the transformer in the target subject according to the high voltage side voltage, the active power, the reactive power, the rated capacity, the no-load current percentage and the named value of the transformer reactance of the transformer in the target subject in the above-mentioned embodiments comprises:

[0096] The reactive power loss of the transformer in the target subject is calculated by using the formula

[0097] Wherein, is the reactive power loss of the transformer in the target subject, is the named value of the transformer reactance of the transformer in the target subject, is the active power of the i-th transformer in the target subject, is the reactive power of the transformer in the target subject, is the high voltage side voltage of the transformer in the target subject, is the no-load current percentage of the transformer in the target subject, is the rated capacity of the transformer in the target subject.

[0098] ​​In this application embodiment, a rigorous mathematical formula for calculating the reactive power loss of a transformer is provided. The rigor of the mathematical logic ensures the accuracy of the calculated reactive power loss of the transformer. Furthermore, by showing the preferred formula for calculating the reactive power loss of a transformer, it is convenient for technicians to refer to, understand, and calculate.

[0099] In one feasible implementation, the calculation of the capacitive reactive power compensation configuration capacity based on the regulation power of all energy storage converters in the energy storage power station and the charging power of all lines in the target main body, as described in the above embodiments, includes:

[0100] Using formula Calculate the capacity of capacitive reactive power compensation configuration;

[0101] The calculation of the inductive reactive power compensation configuration capacity based on the regulation power of all energy storage converters in the energy storage power station, the reactive power loss of all lines in the target main body, and the reactive power loss of all transformers in the target main body in the above embodiments includes:

[0102] Using formula Calculate the configuration capacity of inductive reactive power compensation;

[0103] in, ;

[0104] In the above formula, Configure capacity for capacitive reactive power compensation. This is the sum of the regulating power of all energy storage converters in the energy storage power station. This is the sum of reactive power losses in all energy storage collector lines and all energy storage access lines in the energy storage power station. This is the sum of reactive power losses of all energy storage step-up transformers in the energy storage power station. This is the sum of reactive power losses for all wind power collection lines, all wind power submarine cable transmission lines, and all wind power onshore transmission lines in the wind farm. This is the sum of reactive power losses of all wind turbine unit transformers and all wind power step-up transformers in the wind farm. Configure capacity for inductive reactive power compensation. This is the sum of the charging power of all energy storage collector lines and all energy storage access lines in the energy storage power station. This is the sum of the charging power of all wind power collection lines, all wind power submarine cable transmission lines, and all wind power onshore transmission lines in the wind farm. This is the sum of the charging power of all submarine wind power transmission lines and all onshore wind power transmission lines in the wind farm. The first in energy storage power stations The regulating power of the energy storage converter The first in energy storage power stations The reactive power loss of the energy storage collection line, reactive power loss of the first reactive power compensation device in the wind power station, reactive power loss of the first wind power collection line in the wind power station, reactive power loss of the first reactive power compensation device in the wind power station, reactive power loss of the first wind power land transmission line in the wind power station, reactive power loss of the first wind power collection line in the wind power station, reactive power loss of the first wind power land transmission line in the wind power station, reactive power loss of the first wind power collection line in the wind power station, reactive power loss of the first wind power land transmission line in the wind power station, reactive power loss of the first wind power collection line in the wind power station, reactive power loss of the first wind power land transmission line in the wind power station, reactive power loss of the first wind power collection line in the wind power station, reactive power loss of the first wind power land transmission line in the wind power station, reactive power loss of the first wind power collection line in the wind power station, reactive power loss of the first wind power land transmission line in the wind power station, charging power of the first reactive power compensation device in the wind power station, charging power of the first reactive power compensation device in the wind power station, charging power of the first reactive power compensation device in the wind power station, charging power of the first reactive power compensation device in the wind power station, charging power of the first reactive power compensation device in the wind power station, charging power of the first reactive power compensation device in the wind power station. It should be noted that, since there is no transformer between the wind power sea cable transmission line and the wind power land transmission line in the wind power station, the line voltage, active power, reactive power and line reactance of the lines are approximately equal, so the reactive power loss calculation of the wind power sea cable transmission line and the wind power land transmission line can be unified as the reactive power loss calculation of the wind power transmission line. In the embodiments of the present application, the calculation formulas of the capacitive reactive power compensation configuration capacity and the inductive reactive power compensation configuration capacity are provided from the mathematical point of view, and the accuracy of the calculated capacitive reactive power compensation configuration capacity and the inductive reactive power compensation configuration capacity can be ensured from the mathematical logic rigor, and the calculation formulas of the capacitive reactive power compensation configuration capacity and the inductive reactive power compensation configuration capacity are preferably shown, so as to provide reference, understanding and calculation for the technical personnel.

[0105] In some embodiments, the present application also provides a reactive power compensation configuration device.

[0106] Please refer to

[0107] In some embodiments, the present application also provides a reactive power compensation configuration device.

[0108] Please refer to Figure 3 ​​Fig. 1 is a schematic diagram of a reactive power compensation configuration device according to an embodiment of the present application. The device 310 includes:

[0109] A reactive loss and charging power calculation module 311 is configured to calculate the reactive loss and charging power of the lines in the target subject, and to calculate the reactive loss of the transformers in the target subject.

[0110] An adjustment power calculation module 312 is configured to obtain the charging and discharging active power and power factor of the energy storage converters in the energy storage power station, so as to calculate the adjustment power of the energy storage converters in the energy storage power station.

[0111] A reactive power compensation calculation module 313 is configured to calculate the reactive power compensation configuration capacity according to the adjustment power of all the energy storage converters in the energy storage power station, the reactive loss and charging power of all the lines in the target subject, and the reactive loss of all the transformers in the target subject.

[0112] An adjustment module 314 is configured to obtain the power factor adjustment range of the energy storage converters in the energy storage power station, and to adjust the power factor of all the energy storage converters in the energy storage power station according to the power factor adjustment range of the energy storage converters in the energy storage power station, so that the reactive power compensation configuration capacity is minimized, and the minimum reactive power compensation configuration capacity is taken as the capacity of the reactive power compensation device to be configured.

[0113] The target subject includes a wind power station and an energy storage power station.

[0114] In the embodiments of the present application, the related content of the above-mentioned reactive loss and charging power calculation module 311, adjustment power calculation module 312, reactive power compensation calculation module 313 and adjustment module 314 can be referred to the content of the embodiments shown in Fig. 1, and will not be described here. Figure 2

[0115] It should be noted that the device 310 of the present application further includes some other modules. It can be understood that the method of the present application has a one-to-one correspondence with the device 310, and therefore some other modules of the device 310 of the present application are the corresponding content of the method of the present application in the above-mentioned embodiments.

[0116] ​In the embodiment of the present application, the reactive power loss and the charging power of the lines in the target subject are calculated, and the reactive power loss of the transformers in the target subject is calculated; then the active power and the power factor of the charge-discharge of the energy storage converters in the energy storage power station are obtained to calculate the regulation power of the energy storage converters in the energy storage power station, and the regulation power of all the energy storage converters in the energy storage power station, the reactive power loss and the charging power of all the lines in the target subject, and the reactive power loss of all the transformers in the target subject are used to calculate the reactive power compensation configuration capacity; finally, the power factor regulation range of the energy storage converters in the energy storage power station is obtained, and the power factor of all the energy storage converters in the energy storage power station is adjusted according to the power factor regulation range of the energy storage converters in the energy storage power station, so that the reactive power compensation configuration capacity is minimized, and the minimum reactive power compensation configuration capacity is taken as the capacity of the reactive power compensation device to be configured, wherein the target subject includes the wind power station and the energy storage power station; that is, by using the energy storage power station matched with the wind power station, considering the reactive power compensation that can be provided by the energy storage power station, and adjusting the power factor of the energy storage converters in the energy storage power station, the reactive power compensation configuration capacity is minimized, thereby reducing the reactive power compensation configuration and reducing the cost; in addition, by participating in the reactive power regulation of the wind power station, the power fluctuation of the wind power station can be effectively smoothed, the voltage level of the wind power station can be improved, the stability and safety of the wind power grid connection can be improved, and the yield of the energy storage power station can be improved.

[0117] In some embodiments, the present application also provides a computer readable storage medium storing a computer program, and the computer program is executed by a processor to make the processor perform the reactive power compensation configuration method in any of the above method embodiments.

[0118] In some embodiments, the present application also provides a computer device including a memory and a processor, and the memory stores a computer program, and the computer program is executed by the processor to make the processor perform the reactive power compensation configuration method in any of the above method embodiments.

[0119] Figure 4 The internal structure diagram of the computer device in some embodiments is shown. The computer device can be a terminal, a server, or a gateway. As shown in the figure, the computer device includes a processor, a memory, and a network interface connected through a system bus. Figure 4

[0120] The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system and can also store a computer program, and the computer program is executed by the processor to make the processor implement each step in the above method embodiments. The internal memory can also store a computer program, and the computer program is executed by the processor to make the processor perform each step in the above method embodiments. Those skilled in the art can understand that the computer program can be stored in the non-volatile storage medium or the internal memory, or both.​Figure 4 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0121] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The program can be stored in a non-volatile computer readable storage medium, and when the program is executed, it can include the processes of the above-mentioned embodiments of the method.

[0122] Any reference to memory, storage, database, or other medium used in the embodiments provided by the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0123] Any combination of the technical features of the above embodiments can be combined. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0124] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A reactive power compensation configuration method, characterized in that, The method includes: Calculate the reactive power loss and charging power of the lines in the target body, and calculate the reactive power loss of the transformer in the target body; The active power and power factor of the energy storage converter in the energy storage power station are obtained to calculate the regulation power of the energy storage converter in the energy storage power station. The reactive power compensation configuration capacity is calculated based on the regulation power of all energy storage converters in the energy storage power station, the reactive power loss and charging power of all lines in the target body, and the reactive power loss of all transformers in the target body. Obtain the power factor adjustment range of the energy storage converter in the energy storage power station, and adjust the power factor of all energy storage converters in the energy storage power station equally according to the power factor adjustment range of the energy storage converter in the energy storage power station, so that the reactive power compensation configuration capacity reaches the minimum, and take the minimum reactive power compensation configuration capacity as the capacity of the reactive power compensation device to be configured. The target entities include wind farms and energy storage power stations; The calculation of reactive power loss of the transformer in the target body includes: Obtain the nominal values ​​of the high-voltage side voltage, active power, reactive power, rated capacity, no-load current percentage, and transformer reactance of the transformer in the target body; Calculate the reactive power loss of the transformer in the target body based on the high-voltage side voltage, active power, reactive power, rated capacity, no-load current percentage, and nominal value of transformer reactance of the transformer in the target body. The calculation of reactive power compensation configuration capacity based on the regulation power of all energy storage converters in the energy storage power station, the reactive power loss and charging power of all lines in the target body, and the reactive power loss of all transformers in the target body includes: The capacitive reactive power compensation configuration capacity is calculated based on the regulation power of all energy storage converters in the energy storage power station and the charging power of all lines in the target body. The inductive reactive power compensation configuration capacity is calculated based on the regulating power of all energy storage converters in the energy storage power station, the reactive power loss of all lines in the target body, and the reactive power loss of all transformers in the target body. The reactive power compensation configuration capacity is defined as the range from the capacitive reactive power compensation configuration capacity to the inductive reactive power compensation configuration capacity.

2. The method according to claim 1, characterized in that, Calculating the reactive power loss of the lines in the target entity includes: Obtain the line voltage, active power, reactive power, and line reactance of the lines in the target body; Calculate the reactive power loss of the lines in the target body based on the line voltage, active power, reactive power, and line reactance of the lines in the target body.

3. The method according to claim 1, characterized in that, Calculating the charging power of the circuits in the target body includes: Obtain the line voltage, angular frequency, and capacitance to ground of the lines in the target body; The charging power of the lines in the target body is calculated based on the line voltage, angular frequency, and capacitance to ground of the lines in the target body.

4. The method according to claim 1, characterized in that, The calculation of the regulation power of the energy storage converter in the energy storage power station includes: Using formula Calculate the regulating power of the energy storage converter in the energy storage power station; in, This refers to the regulating power of the energy storage converter in the energy storage power station. This refers to the active power of the energy storage converter in an energy storage power station during charging and discharging. The power factor of the energy storage converter in the energy storage power station is given.

5. The method according to claim 2, characterized in that, The calculation of reactive power loss of the lines in the target entity based on the line voltage, active power, reactive power, and line reactance of the lines in the target entity includes: Using formula Calculate the reactive power loss of the lines in the target body; in, The reactive power loss of the lines in the target body. The line reactance of the circuit in the target body. Let be the active power of the lines in the target body. The reactive power of the lines in the target body is [value missing]. The line voltage of the circuit in the target body.

6. The method according to claim 3, characterized in that, The step of calculating the charging power of the lines in the target body based on the line voltage, angular frequency, and capacitance to ground of the lines in the target body includes: Using formula Calculate the charging power of the circuits in the target body; in, The charging power of the circuitry in the target body. The voltage of the circuit in the target body. The angular frequency of the circuitry in the target body is given. The capacitance to ground of the circuit in the target body is given.

7. The method according to claim 1, characterized in that, The calculation of reactive power loss of the transformer in the target body based on the high-voltage side voltage, active power, reactive power, rated capacity, no-load current percentage, and nominal value of transformer reactance of the transformer in the target body includes: Using formula Calculate the reactive power loss of the transformer in the target body; in, The reactive power loss of the transformer in the target body. Here is the named value of the transformer reactance of the transformer in the target body. The active power of the i-th transformer in the target body. The reactive power of the transformer in the target body. The voltage on the high-voltage side of the transformer in the target body. The percentage of no-load current of the transformer in the target body. The rated capacity of the transformer in the target body.

8. The method according to claim 1, characterized in that, The calculation of the capacitive reactive power compensation configuration capacity based on the regulation power of all energy storage converters in the energy storage power station and the charging power of all lines in the target main body includes: Using formula Calculate the capacity of the capacitive reactive power compensation configuration; The calculation of the inductive reactive power compensation configuration capacity based on the regulating power of all energy storage converters in the energy storage power station, the reactive power loss of all lines in the target body, and the reactive power loss of all transformers in the target body includes: Using formula Calculate the capacity of the inductive reactive power compensation configuration; in, ; In the above formula, Configure capacity for the capacitive reactive power compensation. This is the sum of the regulating power of all energy storage converters in the energy storage power station. This is the sum of reactive power losses in all energy storage collector lines and all energy storage access lines in the energy storage power station. This is the sum of reactive power losses of all energy storage step-up transformers in the energy storage power station. This is the sum of reactive power losses for all wind power collection lines, all wind power submarine cable transmission lines, and all wind power onshore transmission lines in the aforementioned wind farm. This is the sum of reactive power losses of all wind turbine unit transformers and all wind power step-up transformers in the aforementioned wind farm. Configure capacity for the inductive reactive power compensation. This is the sum of the charging power of all energy storage collector lines and all energy storage access lines in the energy storage power station. This is the sum of the charging power of all wind power collection lines, all wind power submarine cable transmission lines, and all wind power onshore transmission lines in the aforementioned wind farm. This is the sum of the charging power of all submarine wind power transmission lines and all land-based wind power transmission lines in the aforementioned wind farm. The first in the energy storage power station The regulating power of the energy storage converter The first in the energy storage power station The reactive power loss of the energy storage collection line, The first in the energy storage power station Reactive power loss of the energy storage access line, The first in the energy storage power station Reactive power loss of an energy storage step-up transformer The first wind farm in the aforementioned wind farm Reactive power loss of a wind power collector line, The first wind farm in the aforementioned wind farm Reactive power loss of a wind power submarine cable transmission line. The first wind farm in the aforementioned wind farm Reactive power loss of a wind power onshore transmission line. The first wind farm in the aforementioned wind farm Reactive power loss of the transformer in each wind turbine unit The first wind farm in the aforementioned wind farm Reactive power loss of a wind power step-up transformer The first in the energy storage power station The charging power of the energy storage collection line, The first in the energy storage power station The charging power of the energy storage access line, The first wind farm in the aforementioned wind farm The charging power of the wind power collection line, The first wind farm in the aforementioned wind farm The charging power of the wind power submarine cable transmission line. The first wind farm in the aforementioned wind farm The charging power of a wind power onshore transmission line.

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