CN110808590A - Cooperative control method and device for reactive power compensation device of transformer substation and storage medium - Google Patents
Cooperative control method and device for reactive power compensation device of transformer substation and storage medium Download PDFInfo
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- CN110808590A CN110808590A CN201910969792.6A CN201910969792A CN110808590A CN 110808590 A CN110808590 A CN 110808590A CN 201910969792 A CN201910969792 A CN 201910969792A CN 110808590 A CN110808590 A CN 110808590A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The embodiment of the invention discloses a cooperative control method, a cooperative control device and a storage medium of a reactive power compensation device of a transformer substation, and relates to the technical field of reactive power compensation of a power system, wherein the control method comprises the following steps: controlling a magnetic control type parallel reactor of a target transformer substation to work in a voltage mode, and acquiring a voltage value of a controlled bus of the target transformer substation and reactive power of the magnetic control type parallel reactor; and if the reactive power of the magnetic control type parallel reactor exceeds a preset reactive power upper limit value and the duration time exceeds preset time, controlling to disconnect at least one group of low-voltage side fixed capacitors of the target transformer substation so as to adjust the voltage value of the controlled bus to a target voltage value. The invention has the following advantages: the magnetic control high-impedance device can play a role of dynamic reactive power compensation all the time, improve the dynamic reactive power compensation efficiency of the magnetic control high-impedance device and improve the voltage quality of a controlled bus.
Description
Technical Field
The embodiment of the invention relates to the technical field of reactive power compensation of power systems, in particular to a cooperative control method and device of a reactive power compensation device of a transformer substation and a storage medium.
Background
The conventional cooperative control method of the reactive power compensation device mainly adopts voltage control, the basic control idea is to take node voltage as a control target, preferentially use a continuous reactive power compensation device for voltage regulation, and consider using a discrete reactive power compensation device for voltage regulation after the continuous reactive power capacity is used up.
The magnetic control type shunt reactor (hereinafter referred to as "magnetic control high reactance") is generally installed on a high-voltage side bus of a transformer substation with a voltage class of 500kV or above, and the low-voltage fixed-capacity capacitor and reactance (hereinafter referred to as "low-capacity" and "low reactance") are generally installed on a low-voltage side bus of the transformer substation. When a power grid normally operates, the fluctuation of system voltage is mainly caused by load change and power plant output change, and in order to constantly control the voltage of a high-voltage side bus of a transformer substation to be a target value Uref, a conventional reactive power compensation device cooperative control method comprises the following steps: the station coordination controller detects the voltage value of the high-voltage side controlled bus in real time, the magnetic control high-voltage reactor adopts a voltage control mode, the reactance value of the station coordination controller can be dynamically adjusted based on the target value Uref of the voltage of the controlled bus, the station coordination controller has a following type steady-state voltage regulation function, and the voltage of the controlled bus is maintained at the target value before the magnetic control high-voltage reactor capacity is used up. When the magnetic control high-impedance capacity is used up, the voltage of the controlled bus deviates from a target value, if the time that the voltage value is continuously higher than the upper limit Umax is longer than the time delay t, a group of low-impedance devices is put in or quit from a group of low-capacitance devices (the low-capacitance devices are preferentially withdrawn), timing is cleared, the magnetic control high-impedance capacity is withdrawn, and the voltage is continuously controlled to be the target value; and if the time that the voltage value is continuously lower than the lower limit Umin is longer than the time delay t, putting a group of low impedances or quitting the group of low impedances (preferentially quitting the low impedances), timing and resetting, and continuously controlling the voltage to be the target value after the magnetic control high impedance capacity is adjusted back.
Therefore, the conventional reactive power compensation device cooperative control method takes the controlled bus voltage as the action criterion of low capacitance and low impedance. And in the time t after the voltage of the controlled bus exceeds the upper limit and the lower limit of the set voltage, the magnetic control high-resistance capacity is in an exhausted state, and the dynamic reactive compensation function cannot be exerted. Meanwhile, the controlled bus voltage is always in an out-of-limit state, which causes the voltage quality to be reduced.
Disclosure of Invention
Therefore, the embodiment of the invention provides a cooperative control method and device for a reactive power compensation device of a transformer substation and a storage medium, so as to solve the problems of low reactive power compensation efficiency and reduced voltage quality of the cooperative control method for the reactive power compensation device in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the embodiment of the first aspect of the invention discloses a cooperative control method for a reactive power compensation device of a transformer substation, which comprises the following steps: controlling a magnetic control type parallel reactor of a target transformer substation to work in a voltage mode, and acquiring a voltage value of a controlled bus of the target transformer substation and reactive power of the magnetic control type parallel reactor; and if the reactive power of the magnetic control type parallel reactor exceeds a preset reactive power upper limit value and the duration time exceeds preset time, controlling to disconnect at least one group of low-voltage side fixed capacitors of the target transformer substation so as to adjust the voltage value of the controlled bus to a target voltage value.
Further, after acquiring the voltage value of the controlled bus and the reactive power of the magnetically controlled shunt reactor, the method further includes: and if the reactive power of the magnetic control type parallel reactor exceeds the preset reactive power upper limit value and the duration time exceeds the preset time, controlling to switch on at least one group of low-voltage side fixed reactance of the target transformer substation so as to adjust the voltage value of the controlled bus to the target voltage value.
Further, after acquiring the voltage value of the controlled bus and the reactive power of the magnetically controlled shunt reactor, the method further includes: and if the reactive power of the magnetic control type parallel reactor is lower than a preset reactive power lower limit value and the duration time exceeds the preset time, controlling to disconnect at least one group of low-voltage side fixed reactance of the target transformer substation so as to adjust the voltage value of the controlled bus to the target voltage value.
Further, after acquiring the voltage value of the controlled bus and the reactive power of the magnetically controlled shunt reactor, the method further includes: and if the reactive power of the magnetically controlled shunt reactor is lower than the preset reactive power lower limit value and the duration time exceeds the preset time, controlling to switch on at least one group of low-voltage side fixed capacitors of the target transformer substation so as to adjust the voltage value of the controlled bus to the target voltage value.
An embodiment of a second aspect of the present invention discloses a cooperative control device for a reactive power compensation device of a substation, including: the driving module is used for driving to switch on or switch off a low-voltage side fixed capacitor of a target transformer substation and is also used for driving to switch on or switch off a low-voltage side fixed reactance of the target transformer substation; the detection module is used for acquiring the voltage value of the controlled bus of the target substation and the reactive power of the magnetic control type parallel reactor; and the control module is used for controlling the magnetically controlled shunt reactor to work in a voltage mode, and if the reactive power of the magnetically controlled shunt reactor exceeds a preset reactive power upper limit value and the duration time of the magnetically controlled shunt reactor exceeds preset time, the driving module drives at least one group of low-voltage side fixed capacitors of the transformer substation to be disconnected so as to adjust the voltage value of the controlled bus to a target voltage value.
Further, the control module is further configured to enable the magnetically controlled shunt reactor to work in a voltage mode, and if the reactive power of the magnetically controlled shunt reactor exceeds the preset upper limit value of the reactive power and the duration time of the magnetically controlled shunt reactor exceeds the preset time, the driving module drives at least one group of low-voltage side fixed reactors of the target substation to be connected, so that the voltage value of the controlled bus is adjusted to the target voltage value.
Further, the control module is further configured to enable the magnetically controlled shunt reactor to work in a voltage mode, and if the reactive power of the magnetically controlled shunt reactor is lower than a preset reactive power lower limit value and the duration time of the magnetically controlled shunt reactor exceeds the preset time, the driving module drives at least one group of low-voltage side fixed reactors of the target substation to be switched on, so that the voltage value of the controlled bus is adjusted to the target voltage value.
Further, the control module is further configured to enable the magnetically controlled shunt reactor to work in a voltage mode, and if the reactive power of the magnetically controlled shunt reactor is lower than the preset reactive power lower limit value and the duration time of the magnetically controlled shunt reactor exceeds the preset time, the driving module drives at least one group of low-voltage side fixed capacitors of the target substation to be connected, so that the voltage value of the controlled bus is adjusted to a target voltage value.
In a third aspect, an embodiment of the present invention further provides an electronic device, including: at least one processor and at least one memory; the memory is to store one or more program instructions; the processor is configured to execute one or more program instructions to execute the cooperative control method for the substation reactive power compensation device according to the first aspect.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium containing one or more program instructions, where the one or more program instructions are used to execute the cooperative control method for a substation reactive compensation device according to the first aspect.
The technical scheme provided by the embodiment of the invention at least has the following advantages:
compared with the conventional reactive power compensation device cooperative control method, the cooperative control method and the cooperative control device for the reactive power compensation device of the transformer substation and the storage medium, the cooperative control method and the cooperative control device for the reactive power compensation device of the transformer substation can trigger low-resistance or low-resistance action before the magnetic control high-resistance reactive power capacity is used up, so that the magnetic control high-resistance reactive power compensation device can play a role in dynamic reactive power compensation all the time, the dynamic reactive power compensation efficiency of the magnetic control high-resistance reactive power compensation device is improved, and the voltage quality of a controlled bus.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.
Fig. 1 is a flowchart of a cooperative control method for a reactive power compensation device of a substation according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of an electrical power system according to an exemplary simulation of the present invention;
FIG. 3 is a simulation result diagram of a conventional reactive power compensation device cooperative control method;
fig. 4 is a simulation result diagram of the cooperative control method of the reactive power compensation device of the transformer substation of the present invention;
fig. 5 is a block diagram of a cooperative control device of a substation reactive power compensation device according to an embodiment of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through an intermediate medium, or they may be connected internally to the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a flowchart of a cooperative control method for a reactive power compensation device of a substation according to an embodiment of the present invention. As shown in fig. 1, the cooperative control method for the reactive power compensation device of the substation according to the embodiment of the present invention includes:
s1: and controlling the magnetic control type parallel reactor of the target transformer substation to work in a voltage mode, and acquiring the voltage value of the controlled bus of the target transformer substation and the reactive power of the magnetic control type parallel reactor.
S2: and if the reactive power of the magnetic control type parallel reactor exceeds a preset reactive power upper limit value Qmax and the duration time exceeds a preset time t, controlling to disconnect at least one group of low-voltage side fixed capacitors of the target transformer substation so as to adjust the voltage value of the controlled bus to the target voltage value.
In an embodiment of the present invention, after step S1, the method further includes: and if the reactive power of the magnetic control type parallel reactor exceeds a preset reactive power upper limit value Qmax and the duration time exceeds a preset time t, controlling to switch on at least one group of low-voltage side fixed reactance of the target transformer substation so as to adjust the voltage value of the controlled bus to the target voltage value.
In an embodiment of the present invention, after step S1, the method further includes: and if the reactive power of the magnetic control type parallel reactor is lower than a preset reactive power lower limit value Qmin and the duration time exceeds a preset time t, controlling to disconnect at least one group of low-voltage side fixed reactance of the target transformer substation so as to adjust the voltage value of the controlled bus to the target voltage value.
In an embodiment of the present invention, after step S1, the method further includes: and if the reactive power of the magnetic control type parallel reactor is lower than a preset reactive power lower limit value Qmin and the duration time exceeds a preset time t, controlling to switch on at least one group of low-voltage side fixed capacitors of the target transformer substation so as to adjust the voltage value of the controlled bus to the target voltage value.
FIG. 2 is a schematic circuit diagram of an electrical power system according to an exemplary simulation of the present invention. As shown in fig. 2, the thevenin power supply on the left side in fig. 1 simulates a 500kV power grid, the controlled power supply on the right side simulates a 220kV wind farm, and the two parallel transformers in the middle, the low-voltage side capacitors (BRKC1 and BRKC2), the reactances (BRKL1, BRKL2, BRKL3 and BRKL4) and the magnetic control high-impedance (CSR) on the 500kV side simulate a 500kV substation. The magnetic control high-resistance rated capacity is 120Mvar, the reactive capacity of the magnetic control high-resistance rated capacity is continuously adjustable within the range of 6Mvar to 120Mvar, 4 groups of low-resistance rated capacity 60Mvar are formed in a single group, and 2 groups of low-resistance rated capacity 60Mvar are formed in a single group. The 500kV transformer substation is connected with a power grid through a 2-circuit 500kV line, and the wind power plant is connected to the 220kV side of the 500kV transformer substation through a 4-circuit 220kV power transmission line. With the increase of the output of the wind power plant, a large amount of reactive power can be consumed by the power transmission line and the transformer, so that the bus voltage of each side of the transformer substation is lowered. The magnetic control high-voltage reactor adopts a voltage control mode, the aim is to maintain the 500kV bus voltage to be 518kV, and the conventional reactive power compensation device cooperative control method and the method provided by the invention are simulated respectively below, and the advantages and disadvantages of the two methods are compared.
Fig. 3 is a simulation result diagram of the cooperative control method of the conventional reactive power compensation device. As shown in fig. 3, the simulation sets up: and 4 groups of low-voltage resistors are switched on the low-voltage side of the transformer substation at the initial moment. The active output of the wind power plant has an initial value of 400MW, and is increased at a rate of 10MW per second. The control target Uref of the 500kV bus is 518kV, the upper limit criterion Umax of the voltage is 520kV, the lower limit criterion Umin of the voltage is 515kV, and the low capacitance or low resistance action time delay t is 25 s. The simulation results are shown in fig. 3. In the figure, U51 is the voltage of a 500kV bus, QX is magnetic control high reactive power, Qlow is the low-voltage side reactive power of a transformer substation, and the reactive power is positive when flowing to reactive compensation equipment.
With the increase of the wind power output, the reactive power of the magnetic control high impedance is gradually reduced, and when the reactive power of the magnetic control high impedance is reduced to the minimum value (Qmin) of 6Mvar, the voltage of the 500kV bus starts to be reduced. When the voltage of the 500kV bus is reduced to 516kV, the timer is started, the low-voltage side is withdrawn from 1 group of low-voltage resistors after 25s, the voltage of the 500kV bus is raised, the magnetic control high-voltage resistor reactive power is adjusted back, and the voltage of the 500kV bus is controlled to 518kV again. With the further increase of the wind power output, the above process is repeated, the magnetic control high resistance is always in an exhausted state within 25s of the starting of the timer, the dynamic reactive compensation function cannot be exerted, the voltage of the 500kV bus is always deviated from a target value within 25s, the waveform of the voltage is in a sawtooth shape, and the voltage quality is reduced.
Fig. 4 is a simulation result diagram of the cooperative control method of the reactive power compensation device of the transformer substation. As shown in fig. 4, the simulation sets up: and 4 groups of low-voltage resistors are switched on the low-voltage side of the transformer substation at the initial moment. The active output of the wind power plant has an initial value of 400MW, and is increased at a rate of 10MW per second. The control target Uref of the 500kV bus is 518kV, the reactive upper limit criterion Qmax is 100Mvar, the reactive lower limit criterion Qmin is 25Mvar, and the low capacitance or low reactance action time delay t is 25 s. The simulation results are shown in fig. 4. In the figure, U51 is the voltage of a 500kV bus, QX is magnetic control high reactive power, Qlow is the low-voltage side reactive power of a transformer substation, and the reactive power is positive when flowing to reactive compensation equipment.
With the increase of the wind power output, the reactive power of the magnetic control high impedance is gradually reduced, when the reactive power of the magnetic control high impedance is reduced to a reactive lower limit criterion of 25Mvar, the timer is started, the reactive power of the magnetic control high impedance is continuously reduced in the next 25s, but the reactive power is not used up, so that the voltage of the 500kV bus is always kept unchanged at 518kV, the low-voltage side is withdrawn from 1 group of low impedance after 25s, the voltage of the 500kV bus is raised, the reactive power of the magnetic control high impedance is adjusted back, and the voltage of the 500kV bus is controlled to be 518kV again. With the further increase of the wind power output, the process is repeated, the magnetic control high-voltage reactor continuously plays a dynamic reactive compensation role within 25s of the starting of the timer, the voltage of the 500kV bus does not deviate from a target value, therefore, a sawtooth-shaped voltage waveform in the figure 3 does not appear, and the voltage quality is obviously improved.
Compared with the conventional reactive power compensation device cooperative control method, the cooperative control method of the reactive power compensation device of the transformer substation provided by the embodiment of the invention can trigger the low-capacitance or low-resistance action before the magnetic control high-resistance reactive power capacity is used up, so that the magnetic control high-resistance device can play a role in dynamic reactive power compensation all the time, the dynamic reactive power compensation efficiency of the magnetic control high-resistance device is improved, and the voltage quality of a controlled bus is also improved.
Fig. 5 is a block diagram of a cooperative control device of a substation reactive power compensation device according to an embodiment of the present invention. As shown in fig. 5, the cooperative control apparatus for a reactive power compensation apparatus of an electric power system according to an embodiment of the present invention includes: a drive module 100, a detection module 200, and a control module 300.
The driving module 100 is configured to drive a low-voltage-side fixed capacitor of the target substation to be connected or disconnected, and is further configured to drive a low-voltage-side fixed reactance of the target substation to be connected or disconnected. The detection module 200 is used for acquiring a voltage value of a controlled bus of a target substation and reactive power of a magnetically controlled shunt reactor. The control module 300 is configured to control the magnetically controlled parallel reactor to operate in a voltage mode, and if the reactive power of the magnetically controlled parallel reactor exceeds a preset reactive power upper limit value and the duration time of the magnetically controlled parallel reactor exceeds a preset time, the driving module 100 drives at least one group of low-voltage side fixed capacitors of the target substation to be disconnected, so that the voltage value of the controlled bus is adjusted to a target voltage value.
In an embodiment of the present invention, the control module 300 is further configured to operate the magnetically controlled parallel reactor in a voltage mode, and if the reactive power of the magnetically controlled parallel reactor exceeds a preset upper reactive power limit and the duration of the magnetically controlled parallel reactor exceeds a preset time, the driving module 100 drives at least one set of low-voltage side fixed reactors of the target substation to be switched on, so that the voltage value of the controlled bus is adjusted to the target voltage value.
In an embodiment of the present invention, the control module 300 is further configured to operate the magnetically controlled parallel reactor in a voltage mode, and if the reactive power of the magnetically controlled parallel reactor is lower than a preset reactive power lower limit value and the duration of the magnetically controlled parallel reactor exceeds a preset time, the driving module 100 drives at least one group of low-voltage side fixed reactors of the target substation to be disconnected, so that the voltage value of the controlled bus is adjusted to the target voltage value.
In an embodiment of the present invention, the control module 300 is further configured to operate the magnetically controlled shunt reactor in a voltage mode, and if the reactive power of the magnetically controlled shunt reactor is lower than a preset reactive power lower limit value and the duration of the magnetically controlled shunt reactor exceeds a preset time, the driving module 100 drives at least one group of low-voltage-side fixed capacitors of the target substation to be switched on, so that the voltage value of the controlled bus is adjusted to the target voltage value.
It should be noted that, a specific implementation of the cooperative control device for the reactive power compensation device of the substation according to the embodiment of the present invention is similar to a specific implementation of the cooperative control method for the reactive power compensation device of the substation according to the embodiment of the present invention, and specific reference is specifically made to the description of the cooperative control method for the reactive power compensation device of the substation, and details are not repeated in order to reduce redundancy.
In addition, other configurations and functions of the cooperative control device of the substation reactive power compensation device according to the embodiment of the present invention are known to those skilled in the art, and are not described in detail in order to reduce redundancy.
An embodiment of the present invention discloses an electronic device, including: at least one processor and at least one memory; the memory is to store one or more program instructions; the processor is used for running one or more program instructions to execute the cooperative control method of the substation reactive power compensation device.
The disclosed embodiment of the present invention provides a computer-readable storage medium, in which computer program instructions are stored, and when the computer program instructions are run on a computer, the computer is caused to execute the above-mentioned cooperative control method for the substation reactive power compensation device.
In an embodiment of the invention, the processor may be an integrated circuit chip having signal processing capability. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The processor reads the information in the storage medium and completes the steps of the method in combination with the hardware.
The storage medium may be a memory, for example, which may be volatile memory or nonvolatile memory, or which may include both volatile and nonvolatile memory.
The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory.
Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous DRAM (DDRSDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM).
The storage media described in connection with the embodiments of the invention are intended to comprise, without being limited to, these and any other suitable types of memory.
Those skilled in the art will appreciate that the functionality described in the present invention may be implemented in a combination of hardware and software in one or more of the examples described above. When software is applied, the corresponding functionality may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
In the description herein, references to the description of "one embodiment" or "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A cooperative control method for a reactive power compensation device of a transformer substation is characterized by comprising the following steps:
controlling a magnetic control type parallel reactor of a target transformer substation to work in a voltage mode, and acquiring a voltage value of a controlled bus of the target transformer substation and reactive power of the magnetic control type parallel reactor;
and if the reactive power of the magnetic control type parallel reactor exceeds a preset reactive power upper limit value and the duration time exceeds preset time, controlling to disconnect at least one group of low-voltage side fixed capacitors of the target transformer substation so as to adjust the voltage value of the controlled bus to a target voltage value.
2. The cooperative control method for the substation reactive power compensation device according to claim 1, further comprising, after obtaining the voltage value of the controlled bus and the reactive power of the magnetically controlled shunt reactor:
and if the reactive power of the magnetic control type parallel reactor exceeds the preset reactive power upper limit value and the duration time exceeds the preset time, controlling to switch on at least one group of low-voltage side fixed reactance of the target transformer substation so as to adjust the voltage value of the controlled bus to the target voltage value.
3. The cooperative control method for the substation reactive power compensation device according to claim 1, further comprising, after obtaining the voltage value of the controlled bus and the reactive power of the magnetically controlled shunt reactor:
and if the reactive power of the magnetic control type parallel reactor is lower than a preset reactive power lower limit value and the duration time exceeds the preset time, controlling to disconnect at least one group of low-voltage side fixed reactance of the target transformer substation so as to adjust the voltage value of the controlled bus to the target voltage value.
4. The cooperative control method for the substation reactive power compensation device according to claim 1, further comprising, after obtaining the voltage value of the controlled bus and the reactive power of the magnetically controlled shunt reactor:
and if the reactive power of the magnetic control type parallel reactor is lower than the preset reactive power lower limit value and the duration time exceeds the preset time, controlling to switch on at least one group of low-voltage side fixed capacitors of the target transformer substation so as to adjust the voltage value of the controlled bus to the target voltage value.
5. The utility model provides a reactive power compensator's of transformer substation cooperative control device which characterized in that includes:
the driving module is used for driving to switch on or switch off a low-voltage side fixed capacitor of a target transformer substation and is also used for driving to switch on or switch off a low-voltage side fixed reactance of the target transformer substation;
the detection module is used for acquiring the voltage value of the controlled bus of the target substation and the reactive power of the magnetic control type parallel reactor;
and the control module is used for controlling the magnetically controlled shunt reactor to work in a voltage mode, and if the reactive power of the magnetically controlled shunt reactor exceeds a preset reactive power upper limit value and the duration time of the magnetically controlled shunt reactor exceeds preset time, the driving module drives and disconnects the low-voltage side fixed capacitors of at least one group of target transformer substations so as to adjust the voltage value of the controlled bus to a target voltage value.
6. The cooperative control device for the substation reactive power compensation device according to claim 5, wherein the control module is further configured to operate the magnetically controlled shunt reactor in a voltage mode, and if the reactive power of the magnetically controlled shunt reactor exceeds the preset upper limit reactive power value and the duration of the magnetically controlled shunt reactor exceeds the preset time, the driving module drives at least one low-voltage side fixed reactance of the target substation to be switched on, so that the voltage value of the controlled bus is adjusted to the target voltage value.
7. The cooperative control device for the substation reactive power compensation device according to claim 5, wherein the control module is further configured to operate the magnetically controlled shunt reactor in a voltage mode, and if the reactive power of the magnetically controlled shunt reactor is lower than a preset reactive power lower limit value and the duration of the magnetically controlled shunt reactor exceeds the preset time, the driving module is configured to drive at least one set of low-voltage side fixed reactance of the target substation to be switched off, so that the voltage value of the controlled bus is adjusted to the target voltage value.
8. The cooperative control device for the substation reactive power compensation device according to claim 5, wherein the control module is further configured to operate the magnetically controlled shunt reactor in a voltage mode, and if the reactive power of the magnetically controlled shunt reactor is lower than the preset reactive power lower limit value and the duration of the magnetically controlled shunt reactor exceeds the preset time, the driving module is used to drive at least one set of low-voltage-side fixed capacitors of the target substation to be switched on, so that the voltage value of the controlled bus is adjusted to a target voltage value.
9. An electronic device, characterized in that the electronic device comprises: at least one processor and at least one memory;
the memory is to store one or more program instructions;
the processor is used for running one or more program instructions to execute the cooperative control method of the substation reactive compensation device according to any one of claims 1 to 4.
10. A computer readable storage medium, characterized in that the computer readable storage medium contains one or more program instructions for executing the cooperative control method of the substation reactive compensation device according to any one of claims 1 to 4.
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| CN113991695A (en) * | 2021-10-28 | 2022-01-28 | 广东电网有限责任公司 | Reactive compensation equipment switching method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113991695A (en) * | 2021-10-28 | 2022-01-28 | 广东电网有限责任公司 | Reactive compensation equipment switching method and device |
| CN113991695B (en) * | 2021-10-28 | 2024-04-30 | 广东电网有限责任公司 | Reactive power compensation equipment switching method and device |
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