KR102420702B1 - Panel-type reactive power compensator directly connected to a high voltage power system - Google Patents

Abstract

Disclosed in the present invention are a panel-type reactive power compensator of a high voltage power system connection type and a power stabilization facility using the same. The panel-type reactive power compensator comprises: a fuse directly connected to a power system; a thyristor valve which performs a switching function; a reactor connected to the thyristor valve and configured to prevent the inflow of harmonic waves; a capacitor connected to the reactor and configured to provide a predetermined phase-lead reactive power when the thyristor valve is turned on; a protective contactor connected between the fuse and the thyristor valve; and a valve control unit which controls the switching of the thyristor valve. The reactive power compensator may be configured to be mounted in a panel-type structure of a preset size, and a plurality of reactive power compensators may be provided in a power stabilization facility in the form of a panel. According to the present invention, it is possible to provide a reactive power compensator which can be stably operated by being directly connected to a high voltage or extra-high voltage by applying a switch having a multi-thyristor structure and a high-insulation interface.

Description

Panel-type reactive power compensation device directly connected to the high-voltage power grid {PANEL-TYPE REACTIVE POWER COMPENSATOR DIRECTLY CONNECTED TO A HIGH VOLTAGE POWER SYSTEM}

The present disclosure relates to a reactive power compensating device, and more particularly, to a panel-type reactive power compensating device of a high voltage power system direct connection method.

In operating the power system, the number of substations where voltage drop due to ground reactive power as well as voltage rise due to advanced reactive power occurs is increasing. This phenomenon may be mainly due to the following causes.

- The power factor is supplied at '1' due to the increase in new and renewable energy power plants, but the capacitive component increases due to the capacitive component of the underground cable.

- Because apartment complexes in new towns exclude the use of ground cables due to microscopic problems and supply electricity through underground cables, it is caused by the capacitive component of cables.

- Conventionally, it has become common to input a capacitor, which is a capacitive component, at the receiving end by using a lot of motor loads. oversupplied.

Conventionally, in order to prevent such voltage fluctuations, a method of putting a capacitor and a reactor into a circuit breaker has been applied, but in this method, it is impossible to adjust the reactive power value, and it is impossible to adjust by closing/opening the circuit breaker due to a transient phenomenon, There are problems in that losses continue to occur as 100% capacitance and reactance are supplied.

Recently, in order to solve the problem of the method of supplying and maintaining capacitors or reactors in parallel to the power system and the problem of power quality in the power system, the development of a flexible AC transmission system (FACTS) facility using power electronic devices and supply is actively being made. A representative of them is a facility that uses a thyristor to input/open a capacitor and a reactor to supply ground or advanced reactive power to stabilize the voltage.

In implementing a reactive power compensation device using such a thyristor, there is a need to develop a device that can be directly connected to a high-voltage or extra-high voltage power system as well as enable parallel control.

An object of the present disclosure for solving these problems is to provide a panel type reactive power compensation device of a high voltage power system direct connection method.

According to an embodiment of the present disclosure, a panel type reactive power compensation device is provided. The device includes a fuse directly connected to the power grid; a thyristor valve performing a switching function; a reactor connected to the thyristor valve and preventing the inflow of external harmonics; a capacitor connected to the reactor and configured to provide a predetermined forward reactive power when the thyristor valve is turned on; a protective contactor connected between the fuse and the thyristor valve; And it may include a valve control unit for controlling the switching of the thyristor valve. The reactive power compensating device may be configured to be mounted in a panel-type structure of a preset standard, and a plurality of reactive power compensating devices may be provided to the power stabilization facility in the form of an easy-to-assemble panel.

In addition, the thyristor valve may include a plurality of pairs of thyristors connected in anti-parallel, the pairs of the plurality of thyristors may be connected in series stacked.

In addition, the valve control unit may control the turn-on/turn-off of each thyristor constituting the thyristor valve in a zero-crossing manner.

In addition, the thyristor may be a Light Triggered Thyristor (LTT). The reactive power compensation device may include a plurality of insulated interfaces respectively connected to each thyristor constituting the thyristor valve and an optical cable. Each insulating interface may convert a thyristor control signal from the valve control unit into an optical signal and transmit it to a corresponding thyristor, convert monitoring data from the corresponding thyristor into an electrical signal and transmit it to the valve control unit.

According to an embodiment of the present disclosure, a power stabilization facility is provided. The facility includes a plurality of panel-type reactive power compensation devices; and a main controller configured to control the input and opening of each of the plurality of panel-type reactive power compensation devices according to the amount of reactive power required in the power system. Each of the panel-type reactive power compensation devices may be connected to the power system in parallel.

In addition, the main controller sets a plurality of groups by grouping a predetermined number of reactive power compensation devices among the plurality of panel-type reactive power compensation devices as a group, and groups according to the amount of reactive power required in the power system It may be configured to select a group to open among and to select a device to open among reactive power compensation devices of the selected group.

In addition, the main controller may be configured to change the input and opening of the groups and the input and opening of the reactive power compensation devices of each group in response to the changed amount of reactive power when the amount of reactive power required in the power system is changed.

In addition, the power stabilization facility may include a plurality of circuit breakers corresponding to the groups. Each circuit breaker may be connected between the reactive power compensation devices of a corresponding group and the power system, and the main controller may control opening and closing of the circuit breakers to enable system separation for each group.

According to an embodiment of the present disclosure, there is provided a method for supplying reactive power in a power stabilization facility. The method comprises the steps of: determining the amount of reactive power required in the power system; determining the input of one or more groups among the plurality of groups according to the required amount of reactive power; determining the input of one or more reactive power compensating devices among the panel-type reactive power compensating devices of the group whose input is determined according to the required amount of reactive power; and providing reactive power to the power system based on the reactive power compensation devices whose input is determined.

In addition, the method, determining the change in the amount of reactive power required in the power system; And it may further include the step of changing whether the input of the groups and whether the reactive power compensation devices of each group are put in according to the changed amount of reactive power.

According to the present disclosure, it is possible to provide a reactive power compensation device capable of minimizing inrush current and voltage distortion by controlling a capacitor in a zero-crossing manner using a thyristor.

In addition, according to the present disclosure, it is possible to provide a reactive power compensation device that can be stably operated by being directly connected to a high voltage or extra high voltage by applying a switch and a high insulation interface made of a thyristor multi-structure.

In addition, according to the present disclosure, a single step that provides a unit large-capacity reactive power is configured as a panel, and a power stabilization facility structure that is composed of a plurality of panels and can be controlled in parallel is implemented, thereby operating according to the target reactive power capacity. A reactive power compensation device may be provided.

1 is a diagram showing the configuration of a panel type reactive power compensation device according to an embodiment of the present disclosure.
2A, 2B and 2C are diagrams illustrating exemplary side cross-sectional views, front cross-sectional views, and rear cross-sectional views, respectively, of the panel-type reactive power compensation device of FIG. 1 .
3 is a diagram illustrating a power stabilization facility composed of a plurality of panel-type reactive power compensation devices according to an embodiment of the present disclosure.
4 is an exemplary graph showing a change in system voltage when the panel-type reactive power compensating device having a unit capacity is input.
5 is a diagram illustrating a control configuration diagram of a power stabilization facility composed of a plurality of panel-type reactive power compensation devices according to an embodiment of the present disclosure.
6 is a flowchart illustrating a reactive power supply method of a power stabilization facility according to an embodiment of the present disclosure.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Various aspects of the invention are described below. It is to be understood that the inventions presented herein may be embodied in a wide variety of forms and that any specific structure, function, or both, presented herein is exemplary only. Based on the inventions presented herein, those of ordinary skill in the art will recognize that one aspect presented herein may be implemented independently of any other aspects, and that two or more of these aspects may vary in various ways. It will be understood that they can be combined with For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. Moreover, such an apparatus may be implemented or such a method may be practiced using other structure, function, or structure and functionality in addition to or other than one or more aspects described herein.

The reactive power compensation device presented in the present specification is a SVC (Static Var Compensator) using a thyristor that can be applied to a flexible power transmission system (FACTS), and a Thyristor Switched Capacitor (SVC-TSC) method that can provide advanced reactive power to the power system It may be a reactive power compensation device of Also, the power system referred to herein may be a three-phase power system.

1 is a diagram showing the configuration of a panel-type reactive power compensation device according to an embodiment of the present disclosure.

As shown in FIG. 1 , the panel type reactive power compensation device 100 includes a fuse 110 , a protective contactor 120 , a thyristor valve 130 , a reactor 140 , a capacitor 150 and a valve control unit 170 . may include. The panel-type reactive power compensation device 100 may be configured such that the components are mounted in a panel-type structure of a preset standard. This panel-type structure facilitates the assembly and arrangement of a plurality of reactive power compensation devices 100 in the power system, and as will be described later, a reactive power compensation device (eg, SVC-TSC) made of a panel unit. ) as one step, it is possible to implement a power stabilization facility composed of a plurality of steps.

A high voltage or extra high voltage of, for example, 1 kV to 27.5 kV may be applied to the power system 10 according to the standard of the corresponding receiving end. The fuse 110 is directly connected to the power system 10 , and may serve to separate the reactive power compensation device 100 from the system when a short circuit accident occurs. The thyristor valve 100 may perform a switching (turn-on/turn-off) function for supplying reactive power. The protective contactor 130 may be connected between the fuse 110 and the thyristor valve 100, and when an abnormality occurs in elements such as a thyristor, a reactor 140, a capacitor 150 in the reactive power compensation device 100, the device 100 ) can play a role in separating it so that it does not work. In one implementation, the protective contactor 130 may be a vacuum contact switch (VCS). The reactor 140 is connected to the thyristor valve 130 and can operate as a current limiting reactor that prevents the inrush current generated during the switching operation by the thyristor as well as the inflow of external harmonics. The capacitor 150 is connected to the reactor 140 , and may provide a predetermined advance reactive power when the thyristor valve 130 is turned on. The predetermined advance reactive power may be a unit reactive power amount (eg, 1MVAR, 5MVAR, etc.) to be provided through one reactive power compensation device 100 , the fuse 110 , the reactor 130 , the capacitor 140 . ) and other passive devices can be designed with specifications for implementing such a capacity.

The valve control unit 170 may be configured to control the switching of the thyristor valve 130 and monitor the state. The valve control unit 170 may include an interface 171 , a control unit 172 , a communication unit 173 , a voltage/current analysis unit 174 , an input/output unit (IN/OUT) 175 , and a display unit 176 . have. The interface 171 may serve as an interfacing for transmitting a thyristor control signal to the thyristor valve 130 and receiving monitoring data such as status information from the thyristor valve 130 . The control unit 172 may be configured to control the operation of the valve control unit 170 , and may be a processing unit such as a field programmable gate array (FPGA), a complex programmable logic device (CPLD), or the like, according to an embodiment. The communication unit 173 may perform a communication function with other devices (eg, the main controller 220 to be described later) of the power stabilization facility, and according to an embodiment, based on a communication protocol applied to the facility such as RS-485, etc. It may be implemented as a communication module. Although not separately shown in the drawing, the voltage/current analyzer 174 checks and analyzes the voltage and current of the power system measured through measuring means such as a PT (Potential Transformer) sensor and a CT (Current Transformer) sensor connected to the power system. can do. The input/output unit 175 may include an input port and an output port for data input/output, and the display unit 176 may display various states (normal state, abnormal state, etc.) of the reactive power compensation device 100 through a light emitting means such as an LED. ) can be displayed visually.

In one embodiment, the thyristor valve 130 may include a plurality of (131-1, ..., 131-m) a pair of thyristors connected in anti-parallel, and the plurality of pairs of thyristors may be connected in series stacked. . The number of thyristor pairs stacked in series may be determined such that the high voltage withstand strength that the thyristor valve 130 can withstand is at least greater than the voltage of the power system 10 . The thyristor valve 130 has a resistance to the high voltage of the power system 10 through the series stacking of thyristors, and forward and reverse current passing through the anti-parallel configuration may be possible.

In one embodiment, the valve control unit 170 may control the turn-on/turn-off of each thyristor constituting the thyristor valve 130 in a zero-crossing (zero-crossing) manner. As such, the reactive power compensation apparatus 100 of the present disclosure may minimize the inrush current and voltage distortion by controlling the capacitor 150 in a zero-crossing manner using a thyristor.

In one embodiment, each thyristor constituting the thyristor valve 130 may be implemented as an Electrical Triggered Thyristor (ETT) or a Light Triggered Thyristor (LTT). When the thyristor is implemented as LTT, the reactive power compensation device 100 is a plurality of insulated interfaces 160-1a, 160-1b, respectively connected to each thyristor constituting the thyristor valve 130 and an optical cable. .., 160-ma, 160-mb), these insulating interfaces 160-1a, 160-1b, ..., 160-ma, 160-mb are to be connected to the valve control unit 170 can For example, the two thyristors of the first pair of thyristors 131-1 may be respectively connected to the two insulating interfaces 160-1a and 160-1b through an optical cable, and the m-th pair of thyristors 131- m) of the two thyristors may be connected to each of the two insulated interfaces 160-ma and 160-mb via an optical cable. In one implementation, the insulating interface may be a laser diode module.

Each of the insulating interfaces 160-1a, 160-1b, ..., 160-ma, 160-mb converts the thyristor control signal (firing) from the valve control unit 170 into an optical signal and transmits it to the corresponding thyristor. And, the monitoring data (status) transmitted as an optical signal from the corresponding thyristor may be converted into an electrical signal and transmitted to the valve control unit 170 . The switching of the thyristor through such an optical signal makes it possible to ensure high insulation of the thyristor valve 130 .

As described above, the present disclosure is directly connected to the high-voltage or extra-high voltage power system 10 by applying the thyristor valve 130 consisting of a thyristor multi-structure having a high voltage withstand strength and the high-insulation interface 160 for processing an optical signal. It is possible to provide a reactive power compensation device 100 that can be connected to a stable operation.

2A, 2B and 2C are diagrams illustrating exemplary side cross-sectional views, front cross-sectional views, and rear cross-sectional views of the panel-type reactive power compensator of FIG. 1 , respectively.

The panel-type reactive power compensation apparatus 100 may be configured to be mounted within a panel-type structure of a preset standard. The dimensions of the panel illustrated in FIGS. 2A, 2B and 2C are 2400 mm (horizontal) * 2900 mm (length) * 3500 mm (width), but is not limited thereto, and the panel of the reactive power compensation device 100 has different dimensions and It can be designed with different arrangements of components.

As such, the reactive power compensation device 100 of the present disclosure may be implemented with the same preset panel standard, and assembling and disposing the plurality of reactive power compensation devices 100 as a plurality of panels of the same standard power Applicable to stabilization equipment.

3 is a diagram illustrating a power stabilization facility composed of a plurality of panel-type reactive power compensation devices according to an embodiment of the present disclosure.

As shown in FIG. 3 , the power stabilization facility of the present disclosure may include a plurality of reactive power compensation devices 100 each connected in parallel to the power system 10 . In addition, the power stabilization facility includes a main controller 220 (shown in FIG. 5) configured to control the input and opening of each of the plurality of panel-type reactive power compensation devices 100 according to the amount of reactive power required in the power system. may include

In one embodiment, the main controller 220 may set a plurality of groups by grouping a predetermined number of reactive power compensating devices among a plurality of panel-type reactive power compensating devices 100 as one group. As illustrated in FIG. 3 , when the power stabilization facility has 3N reactive power compensating devices 100 , by setting N reactive power compensating devices 100 into one group, three groups are can be set. For example, the first group (or bank) is composed of N reactive power compensation devices 100-1 to 100-N constituting N steps of SVC-TSC, and the second group is N of SVC-TSC It is composed of the next N reactive power compensation devices 100-N+1 to 100-2N constituting the step, and the third group is the next N reactive power compensation devices 100 constituting the N step of the SVC-TSC. -2N+1 to 100-3N).

In addition, the power stabilization facility may include a plurality of circuit breakers 200 corresponding to the set groups. Each circuit breaker 200 may be connected between the reactive power compensation devices 100 and the power system 10 of a corresponding group, and the main controller 220 is a circuit breaker 200 to enable separation of the grid for each group. opening and closing can be controlled. For example, the first circuit breaker 200-1 is connected to the reactive power compensation devices 100-1 to 100-N of the first group, and the second circuit breaker 200-2 is the reactive power of the second group. The compensation devices 100-N+1 to 100-2N are connected, and the third circuit breaker 200-3 can be connected to the reactive power compensation devices 100-2N+1 to 100-3N of the third group. have. In one embodiment, the breaker 200 may be a vacuum circuit breaker (VCB).

4 is an exemplary graph showing a change in system voltage when the panel-type reactive power compensator having a unit capacity is input.

As described above, one reactive power compensation apparatus 100 constituting the SVC-TSC 1 step may be implemented to provide a predetermined unit reactive power amount. Accordingly, the amount of reactive power that can be compensated by the reactive power compensating devices 100 does not increase linearly, but increases discontinuously by the unit reactive power amount according to the number of input (ie, turned on) reactive power compensating devices 100 . can do.

As illustrated in FIG. 4 , if one step of SVC-TSC can provide a unit reactive power amount of 5MVAR, if SVC-TSC is additionally input one step at a time, the reactive power supplied until the target reactive power is reached. It can increase discontinuously in units of 5MVAR, and the grid voltage can also increase in a stepwise manner according to the increase in reactive power supplied by units of 5MVAR.

The main controller 220 may be configured to select a group to be opened from among the groups according to the amount of reactive power required in the power system 10 and to select a device to be opened from among the reactive power compensation devices 100 of the selected group. For example, the power stabilization facility of FIG. 3 is composed of three groups each consisting of five (ie, N=5) reactive power compensating device 100, and one step of reactive power compensating device 100 is 5MVAR of It is assumed that the unit reactive power can be provided. In this case, if an amount of reactive power of 40 MVAR is required for power factor improvement of the power system 10, the main controller 220 selects the first group and inputs 5 SVC-TSC steps of the first group (ie, turn on) ) to generate 25MVAR of reactive power, select the second group, and put 3 SVC-TSC steps in the second group to generate 15MVAR reactive power, and open ( That is, by turning off) and controlling the third group to block (eg, open the circuit breaker 200-3), it is possible to provide a target amount of reactive power of 40MVAR.

In addition, the main controller 220 controls the input and opening of the groups and the input and opening of the reactive power compensation devices 100 of each group in response to the changed amount of reactive power when the amount of reactive power required in the power system 100 is changed. can be configured to change. For example, in the above example, when the target reactive power amount is changed from 40MVAR to 55MVAR, the main controller 220 additionally inputs the remaining two SVC-TSC steps of the second group to generate an additional reactive power amount of 10MVAR and , by selecting the 3rd group and injecting 1 SVC-TSC step of the 3rd group to generate an additional reactive power amount of 5MVAR and control to open the remaining 4 SVC-TSC steps of the 3rd group, thereby invalidating the changed target of 55MVAR power can be provided.

5 is a diagram illustrating a control configuration diagram of a power stabilization facility composed of a plurality of panel-type reactive power compensation devices according to an embodiment of the present disclosure.

As shown in Figure 5, the system for operating the power stabilization facility is HMI (Human Machine Interface) (230-1, 230-2), the main controller 220, the communication interface 210, each of a plurality (N) A plurality of (M) groups consisting of the reactive power compensation devices 100 of can

HMI is a device that allows an operator to perform system setting, system status monitoring, and system control, and may be implemented as a fixed device 230-1 such as a workstation or PC or a mobile device 230-2 such as a tablet or laptop computer. can The main controller 220 may be configured to receive power state information from the receiving end, analyze the power system state and system state, and issue an operation command. In addition, the main controller 220 controls the input and opening (eg, opening and closing of the circuit breakers 200-1 to 200-M) of a plurality of (M) groups according to the amount of reactive power required as a result of the power system analysis and , a plurality of (N) reactive power compensation devices 100 of each group to control the closing and opening of each of the reactive power compensation device 100 to control the valve control unit 170 (ie, SVC-TSC controller) It may be configured to issue a command. Through this, the main controller 220 may perform parallel control on each of the plurality of reactive power compensation devices 100 and groups consisting of them. The valve control unit 170 of each reactive power compensation device 100 may be configured to control the switching of the thyristor valve 130 according to an operation command from the main controller 220 and to monitor the operating state. The communication interface 210 may serve as an interface for mutual communication between the SVC-TSC controllers of the HMIs 230-1 and 230-2, the main controller 220, and the plurality of reactive power compensation devices 100. have.

Through this configuration, the present disclosure configures a single step that provides a unit large-capacity reactive power as a panel and operates according to the target reactive power capacity by implementing a power stabilization facility structure that is composed of a plurality of panels and enables parallel control Possible reactive power compensation devices and power stabilization facilities can be provided.

6 is a flowchart illustrating a reactive power supply method of a power stabilization facility according to an embodiment of the present disclosure.

As shown in FIG. 6 , the main control unit 220 of the power stabilization facility may determine the amount of reactive power required by the power system 10 by analyzing the power state information from the receiving end ( 610 ). The main control unit 220 determines the input of one or more groups of the groups of reactive power compensation devices 100 according to the required amount of reactive power (620), and among the reactive power compensation devices 100 of the group where the input is determined. It is possible to determine the input of one or more reactive power compensation devices (630). The main control unit 220 may control the power stabilization facility to provide reactive power corresponding to the required amount of reactive power to the power system 10 based on the reactive power compensation devices for which input is determined (640).

In addition, the main controller 220 may determine a change in the amount of reactive power required in the power system 10 according to the change in the power state of the power system (10). The main control unit 220 may control to change whether the groups are put in and whether the reactive power compensation devices 100 of each group are put in so that reactive power corresponding to the changed amount of reactive power can be provided to the power system 100 . have.

The description of the presented embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments presented herein, but is to be construed in the widest scope consistent with the principles and novel features presented herein.

10: power grid
100: panel type reactive power compensation device
110: fuse
120: protective contactor
130: thyristor valve
131-1, 131-m: a pair of thyristors
140: reactor
150: capacitor
160-1a, 160-1b, 160-ma, 160-mb: isolated interface
170: valve control
171: interface
172: control unit
173: communication department
174: voltage / current analysis unit
175: input/output unit (IN/OUT)
176: display unit
200-1, 200-2, 200-3, 200-M: Breaker
210: communication interface
220: main controller
230-1, 230-2: HMI

Claims (10)

A panel type reactive power compensation device comprising:
fuses that are directly connected to the power grid;
a thyristor valve performing a switching function;
a reactor connected to the thyristor valve and preventing the inflow of external harmonics;
a capacitor connected to the reactor and configured to provide a predetermined forward reactive power when the thyristor valve is turned on;
a protective contactor connected between the fuse and the thyristor valve; and
A valve control unit for controlling the switching of the thyristor valve
including,
The reactive power compensation device is configured to be mounted in a panel-type structure of a preset standard,
The thyristor valve includes a plurality of pairs of thyristors connected in anti-parallel, and the pairs of the plurality of thyristors are connected in series stacking,
The valve control unit controls the turn-on/turn-off of each thyristor constituting the thyristor valve in a zero-crossing manner,
The thyristor is a Light Triggered Thyristor (LTT),
The reactive power compensating device includes a plurality of insulated interfaces respectively connected to each thyristor constituting the thyristor valve and an optical cable,
Each insulating interface converts a thyristor control signal from the valve control unit into an optical signal and transmits it to a corresponding thyristor, and converts monitoring data from the corresponding thyristor into an electrical signal and transmits it to the valve control unit,
Enclosed reactive power compensator. delete delete delete A power stabilization facility comprising:
A plurality of panel-type reactive power compensation devices according to claim 1; and
Comprising a main controller configured to control the input and opening of each of the plurality of panel-type reactive power compensation devices according to the amount of reactive power required in the power system,
The panel-type reactive power compensation devices are each connected to the power grid in parallel,
power stabilization equipment. 6. The method of claim 5,
The main controller sets a plurality of groups by grouping a predetermined number of reactive power compensation devices among the plurality of panel-type reactive power compensation devices, and opens among the groups according to the amount of reactive power required in the power system configured to select a group to be opened and to select a device to open among reactive power compensation devices of the selected group,
power stabilization equipment. 7. The method of claim 6,
The main controller is configured to change the closing and opening of the groups and the closing and opening of the reactive power compensation devices of each group in response to the changed amount of reactive power when the amount of reactive power required in the power system is changed,
power stabilization equipment. 6. The method of claim 5,
Further comprising a plurality of breakers corresponding to the groups,
Each circuit breaker is connected between the reactive power compensation devices of a corresponding group and the power grid, and the main controller controls opening and closing of the circuit breakers to enable grid separation for each group,
power stabilization equipment. In the reactive power supply method of the power stabilization facility according to any one of claims 5 to 8,
Determining the amount of reactive power required in the power system;
determining the input of one or more groups among the plurality of groups according to the required amount of reactive power;
determining the input of one or more reactive power compensating devices among the panel-type reactive power compensating devices of the group in which the input is determined according to the required amount of reactive power; and
Comprising the step of providing reactive power to the power grid based on the reactive power compensation devices for which the input is determined,
Reactive power supply method in power stabilization installations. 10. The method of claim 9,
determining a change in the amount of reactive power required in the power system; and
Further comprising the step of changing whether the input of the groups and the input of the reactive power compensation devices of each group according to the changed amount of reactive power,
Reactive power supply method in power stabilization installations.

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