CN209844557U - Dynamic reactive and arc-extinguishing comprehensive compensation device - Google Patents
Dynamic reactive and arc-extinguishing comprehensive compensation device Download PDFInfo
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- CN209844557U CN209844557U CN201920895991.2U CN201920895991U CN209844557U CN 209844557 U CN209844557 U CN 209844557U CN 201920895991 U CN201920895991 U CN 201920895991U CN 209844557 U CN209844557 U CN 209844557U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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 utility model discloses a dynamic reactive and arc extinction comprehensive compensation device, which comprises a control cabinet, a dynamic reactive compensation device and a neutral point special switch which are connected in series, wherein the control cabinet is respectively connected with the dynamic reactive compensation device and the neutral point special switch; the dynamic reactive power compensation device is a star-connected dynamic reactive power compensation device, and the neutral point special switch is connected between the neutral point of the star-connected dynamic reactive power compensation device and the ground. The utility model can not only play the role of reactive compensation when the system is in normal operation; and when the system is in single-phase grounding, the functions of simultaneously compensating reactive power, capacitance current of the compensation system to the ground and arc extinguishing are achieved, the structure of the power grid is simplified, the occupied area is reduced, the system construction and maintenance cost is reduced, and reliable guarantee is provided for the stable operation of the power grid.
Description
Technical Field
The utility model relates to an electric power system operation compensation technical field, especially a compensation arrangement is synthesized to idle and arc extinction.
Background
With the rapid development of cities, the use of cables in a power grid is rapidly increased, so that the capacitance and current of the system are rapidly increased; meanwhile, along with the increase of user loads and power electronic products, the reactive power of the system is also increased rapidly, so that the potential hazard is formed to the safe operation of the power grid, and the wide attention is paid more and more.
In the power system, the method for eliminating the electric arc generated when the single-phase earth fault is caused by the large system capacitance current mainly adopts an arc suppression coil for compensation; the capacity of the arc suppression coil can change smoothly, the capacitance current can be automatically tracked and measured, and the arc suppression coil can immediately act and fully compensate the power frequency grounding current when the single-phase grounding is carried out, so that the arc can be rapidly extinguished. And when the reactive power compensation device is used for dynamically adjusting the reactive power of the system, the reactive power compensation device is adopted for adjusting, the reactive power compensation device can be smoothly and steplessly adjusted, the reactive power of the system is automatically compensated, energy conservation and consumption reduction are achieved, the voltage is stabilized, and the safety and the stability of a power grid are improved.
However, at present, the two kinds of devices are independently arranged, that is, the dynamic reactive compensation device is connected to the bus through the series dynamic reactive compensation switch cabinet, and the ground compensation arc suppression device is connected between the neutral point and the ground through the series arc suppression coil switch cabinet, as shown in fig. 1. The arrangement of the two complete compensation devices not only causes the complex structure of the power grid, occupies a large area and improves the construction and maintenance cost, but also can not respond to the state change of the system in time due to the complex compensation algorithm of the system, and is not beneficial to the stable operation of the power grid.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides a dynamic reactive and arc extinction comprehensive compensation device, dynamic reactive and to the compensation that ground holds the flow when adopting one set of equipment can satisfy the dynamic reactive compensation of system and single-phase ground connection, further simplify the electric wire netting structure, reduce area, provide the guarantee for the steady operation of electric wire netting.
In order to solve the technical problem, the utility model adopts the following technical proposal.
A dynamic reactive and arc extinction comprehensive compensation device comprises a control cabinet, a dynamic reactive compensation device and a neutral point special switch which are connected in series, wherein the control cabinet is respectively connected with the dynamic reactive compensation device and the neutral point special switch; the dynamic reactive power compensation device is a star-connected dynamic reactive power compensation device, and the neutral point special switch is connected between the neutral point of the star-connected dynamic reactive power compensation device and the ground.
The dynamic reactive power and arc extinction comprehensive compensation device comprises a starting cabinet, a reactance cabinet and a power cabinet which are connected in series, wherein three-phase cascade power units connected in a star shape are arranged in the power cabinet.
The dynamic reactive and arc-extinguishing comprehensive compensation device is characterized in that a high-voltage electrified display, a high-voltage isolating switch, a high-voltage vacuum contactor and a high-voltage corrugated resistor are arranged in the starting cabinet and are connected in series through a power cable.
According to the dynamic reactive and arc extinction comprehensive compensation device, a series reactor and a Hall current sensor are arranged in a reactance cabinet, the series reactor is connected with the input end of a power cabinet through a power cable, and the Hall current sensor is sleeved on the power cable in a penetrating manner; and the power cable positioned in the reactance cabinet is connected with a lightning arrester. The dynamic reactive and arc-extinguishing comprehensive compensation device is characterized in that a controller, an indicator lamp, an intermediate relay and a touch screen are arranged in the control cabinet, the indicator lamp, the intermediate relay and the touch screen are respectively connected with the controller, and the output end of the controller is connected with the controlled end of the neutral point special switch through the intermediate relay.
In the dynamic reactive and arc-extinguishing comprehensive compensation device, the switch special for the neutral point is a vacuum contactor, a vacuum circuit breaker or SF6One kind of circuit breaker.
Due to the adoption of the technical scheme, the utility model has the following technical progress.
The utility model adopts a set of star-connected dynamic reactive power compensation equipment which can not only output the capacitive and inductive reactive power required by the system in a stepless way when the system operates normally, but also play a role of reactive power compensation; when the system is in single-phase grounding, unbalanced capacitive current can be absorbed and flows out through the neutral point special switch, so that the effects of the compensation system on ground capacitive current and arc extinction are achieved, and meanwhile, reactive power compensation can be stably, quickly and accurately performed on the power system. The utility model discloses an use and simplified the electric wire netting structure, reduced area, reduced system construction and maintenance cost, provide reliable guarantee for the steady operation of electric wire netting.
Drawings
Fig. 1 is a structural topology diagram of a conventional reactive power compensation plant and a ground compensation plant which are independently arranged;
FIG. 2 is a topology diagram of the system of the present invention;
FIG. 3 is an electrical structural diagram of the present invention;
fig. 4 is an electrical schematic structure diagram between electrical devices in the control cabinet of the present invention;
fig. 5 is an electrical schematic diagram of the power cabinet of the present invention.
Detailed Description
In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention.
A dynamic reactive and arc extinction comprehensive compensation device is connected between a bus and the ground in series through a power cable, a switch cabinet is further connected between the dynamic reactive and arc extinction comprehensive compensation device and the bus in series, and a system topology structure formed by the dynamic reactive and arc extinction comprehensive compensation device and the switch cabinet is shown in figure 2.
The switch cabinet is used for realizing switching operation of the device, and a circuit breaker and a disconnecting switch which are connected in series on a bus are arranged in the switch cabinet.
The structure of the dynamic reactive power and arc extinction comprehensive compensation device is shown in fig. 3, and the dynamic reactive power compensation device and the neutral point special switch are connected in series, and the control cabinet is respectively connected with the dynamic reactive power compensation device and the neutral point special switch. The utility model discloses well dynamic reactive power compensator connects for the star dynamic reactive power compensator that connects, and the neutral point special switch is connected between star dynamic reactive power compensator's neutral point and the ground.
The electrical structure of the dynamic reactive power compensation device in this embodiment is shown in fig. 3, and includes a start-up cabinet, a reactance cabinet and a power cabinet connected in series.
The starting cabinet is internally provided with a high-voltage electrified display, a high-voltage isolating switch, a high-voltage vacuum contactor and a high-voltage ripple resistor which are connected in series through a power cable. The high-voltage live display is used for visually displaying whether the electrical equipment has operating voltage or not, the high-voltage isolating switch and the high-voltage vacuum contactor are used for switching rear equipment, and the high-voltage ripple resistor is used for realizing soft start of the equipment.
The reactance cabinet is used for suppressing harmonic waves and electrically connecting, a series reactor and a Hall current sensor are arranged in the reactance cabinet in the embodiment, the series reactor is connected with the input end of the power cabinet through a power cable, and the Hall current sensor is sleeved on the power cable in a penetrating manner and used for collecting system current; and the power cable positioned in the reactance cabinet is connected with a lightning arrester.
The power cabinet is used for compensating reactive power in the system, and the main equipment in the power cabinet in this embodiment is a three-phase cascade power unit connected in a star shape, as shown in fig. 5. The cascade power unit is composed of a plurality of power units which are connected in series.
The control cabinet is internally provided with a controller, and an indicator light, an intermediate relay and a touch screen which are respectively connected with the controller, and the connection relationship among the devices is shown in figure 4.
The utility model provides a neutral point special switch is vacuum contactor, vacuum circuit breaker or SF6One kind of circuit breaker.
The utility model discloses a theory of operation does: when the system normally operates, the controller collects system current through the current transformer, calculates instantaneous reactive power of the system by combining system voltage, outputs control signals to power units in the power cabinet according to a calculation result and system setting parameters, normally outputs reactive power, effectively compensates reactive power of the system, and improves system power factor and stabilizes system voltage; when the system has single-phase earth fault, the controller calculates the equivalent phase voltage, reactive power and earth capacitance current of the system through the collection of the voltage and current of the system, then outputs a control signal to the power cabinet to compensate the system, and sends an action instruction to the special neutral point switch through the intermediate relay to compensate the system capacitance current, automatically eliminate the earth arc light and ensure the normal operation of the power system.
The high-voltage live display, the high-voltage isolating switch, the high-voltage vacuum contactor, the high-voltage ripple resistor, the series reactor, the Hall current sensor, the power unit, the indicator lamp, the intermediate relay and the touch screen in the switch cabinet, the neutral point special switch and the dynamic reactive power compensation device can be directly purchased from the market and connected by cables according to the specification and the electrical connection relationship of the system; the utility model discloses the core chip of controller mainly adopts the microprocessor that has AD conversion and power, holds flow calculation ability and output control instruction.
The above detailed description of embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (6)
1. The utility model provides a compensation arrangement is synthesized to idle and arc extinction of developments which characterized in that: the control cabinet is respectively connected with the dynamic reactive power compensation device and the neutral point special switch; the dynamic reactive power compensation device is a star-connected dynamic reactive power compensation device, and the neutral point special switch is connected between the neutral point of the star-connected dynamic reactive power compensation device and the ground.
2. A dynamic reactive and arc extinction comprehensive compensation device according to claim 1, characterized in that: the dynamic reactive power compensation device comprises a starting cabinet, a reactance cabinet and a power cabinet which are connected in series, wherein three-phase cascade power units in star connection are arranged in the power cabinet.
3. A dynamic reactive and arc extinction comprehensive compensation device according to claim 2, characterized in that: and a high-voltage electrified display, a high-voltage isolating switch, a high-voltage vacuum contactor and a high-voltage corrugated resistor which are connected in series through a power cable are arranged in the starting cabinet.
4. A dynamic reactive and arc extinction comprehensive compensation device according to claim 2, characterized in that: a series reactor and a Hall current sensor are arranged in the reactance cabinet, the series reactor is connected with the input end of the power cabinet through a power cable, and the Hall current sensor is sleeved on the power cable in a penetrating manner; and the power cable positioned in the reactance cabinet is connected with a lightning arrester.
5. A dynamic reactive and arc extinction comprehensive compensation device according to claim 1, characterized in that: the control cabinet is internally provided with a controller, an indicator light, an intermediate relay and a touch screen which are respectively connected with the controller, and the output end of the controller is connected with the controlled end of the neutral point special switch through the intermediate relay.
6. A dynamic reactive and arc extinction comprehensive compensation device according to any one of claims 1 to 5, characterized in that: the neutral point special switch is a vacuum contactor, a vacuum circuit breaker or SF6One kind of circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920895991.2U CN209844557U (en) | 2019-06-14 | 2019-06-14 | Dynamic reactive and arc-extinguishing comprehensive compensation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920895991.2U CN209844557U (en) | 2019-06-14 | 2019-06-14 | Dynamic reactive and arc-extinguishing comprehensive compensation device |
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| CN209844557U true CN209844557U (en) | 2019-12-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509690A (en) * | 2020-05-11 | 2020-08-07 | 云南电网有限责任公司电力科学研究院 | Ground fault full-compensation system and method for multiplexing reactive compensation |
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2019
- 2019-06-14 CN CN201920895991.2U patent/CN209844557U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509690A (en) * | 2020-05-11 | 2020-08-07 | 云南电网有限责任公司电力科学研究院 | Ground fault full-compensation system and method for multiplexing reactive compensation |
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