CN201466738U - Reactive power compensation device of grid - Google Patents
Reactive power compensation device of grid Download PDFInfo
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- CN201466738U CN201466738U CN200920103520XU CN200920103520U CN201466738U CN 201466738 U CN201466738 U CN 201466738U CN 200920103520X U CN200920103520X U CN 200920103520XU CN 200920103520 U CN200920103520 U CN 200920103520U CN 201466738 U CN201466738 U CN 201466738U
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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 reactive power compensation device of a grid, which comprises a voltage regulator and a reactive power compensator, wherein the voltage regulator and the reactive power compensator are connected with a grid bus. Windings at the outlet terminal of the voltage regulator are arranged into a voltage reducing winding with a plurality of voltage reducing taps and a voltage increasing winding with a plurality of voltage increasing taps. The voltage reducing taps and the voltage increasing taps are connected with the reactive power compensator through a switch, wherein the reactive power compensator is combined by capacitors or reactors or both the capacitors and the reactors. Capacitor branches are connected with the reactors in parallel. When the voltage of the grid system is normal, the reactive power compensator is connected with the voltage reducing taps, and when the voltage is low, the capacitors and the reactors are switched; and when the voltage is lower than the allowable value, the reactive power compensator is connected with the voltage increasing taps to apply a voltage approximately equal to the rated voltage to the two ends of the capacitors and the reactors, so that the rated capacity compensation is added to the system under low system voltage and the voltage collapses are effectively reduced and avoided.
Description
Technical field
The utility model relates to a kind of electric network reactive compensation device with boost function, and it is applied to line voltage is regulated the compensation that reaches reactive power.
Background technology
Reactive power in the electrical network at every moment all exists, so reactive power compensation, control device are used in big and small transformer station or electricity usage place.The load of whole network system is divided into inductive load and capacitive load, and the reactive power compensation mode of electric power system also has two kinds: shunt capacitor carries out capacitive compensation and shunt reactor carries out the perception compensation.China's utility model patent 200820077377.7 discloses a kind of electric network positive and negative reactive power compensation device, is applied to the compensation to line voltage and reactive power.This kind electric network reactive compensation device comprises the autotransformer that the end of incoming cables is connected with bus by circuit breaker, and the autotransformer leading-out terminal is connected in parallel to capacitor and reactor.It is a kind of static passive compensation device, can provide capacitive compensation that the perception compensation can be provided again.Come the idle output capacity of regulating capacitor, reactor by the terminal voltage of autotransformer regulating capacitor, reactor, it is a switching reactive-load compensator under situation about being lower than under the rated voltage, avoid serious overvoltage, shoved, can realize a grade fine tuning in from specified capacitive compensation capacity to the gamut of specified perceptual compensation capacity.But the voltage regulator that this electric network reactive compensation device is adopted is a step-down transformer, and the maximum of the voltage of secondary output is identical with system voltage.
When reactive power compensation, capacitor is idle exerts oneself and is Q=ω CU
2, exerting oneself of reactor is Q=U
2/ ω L, the size of exerting oneself of reactive power compensator that is to say the size of reactive compensation capacity all be proportional to voltage square.If occur the reactive power compensation deficiency in the electrical network, voltage will reduce; The reactive compensation capacity that the reduction of voltage will make shunt capacitor loop or reactor loop provide again further reduces, and no-power vacancy is further increased, and makes the idle rated value that is significantly less than, and system voltage can continue to reduce, and forms vicious circle.When system need increase reactive power compensation, because the reduction of voltage, the reactive power compensation ability also can significantly reduce, and will cause the system voltage collapse when extreme.Just need this moment to improve system voltage near rated voltage, make the voltage that is added on the reactive-load compensator, could guarantee the maximum output of reactive power compensation so also near rated value.And automatic coupling voltage regulator is just regulated downwards from the system voltage value in the existing voltage-regulation type reactive compensation system, when system voltage is lower than rated value, the voltage that is added on the reactive-load compensator also can reduce, maximum reactive power compensation output capacity also can be along with reduction, the problem of idle undercapacity in the time of can not the countermeasure system low-voltage.
In the device that carries out voltage and reactive power compensation that adopts the grouping switching mode, capacitor directly inserts bus by switch, when system voltage was lower than rated value, maximum reactive compensation capacity can reduce rapidly, the problem of idle undercapacity in the time of can not the countermeasure system low-voltage.
The utility model content
The utility model technical issues that need to address provide a kind of electric network reactive compensation device, it can be at switched capacitor under the low-pressure state, avoid overvoltage, shove, also can when system voltage low pressure permissible value, improve the voltage that is added in reactive-load compensator, the problem that reactive power can not full remuneration when low with resolution system voltage.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
A kind of electric network reactive compensation device, the reactive-load compensator that comprises voltage regulator, is connected with voltage regulator by switch, the end of incoming cables of voltage regulator is connected with the electrical network bus by circuit breaker, the leading-out terminal winding of voltage regulator is provided with the step-down winding and the winding that boosts simultaneously, the step-down winding and the winding that boosts are drawn the step-down tap respectively and the tap that boosts, the step-down tap is connected with reactive-load compensator by switch with the tap that boosts. and described voltage regulator is one, the secondary side of voltage regulator is provided with a plurality of step-down taps and the tap that boosts, and described switch can be to cut switch.
Further improvement of the utility model is: described reactive-load compensator is the combination of the wherein a kind of of capacitance reactive compensation device or reactance reactive-load compensator or two kinds.
Further improvement of the utility model is: described reactive-load compensator is a capacitance reactive compensation device branch road and the combination in parallel of reactance reactive-load compensator branch road, and capacitance reactive compensation device and reactance reactive-load compensator connect by switch and the switch that is connected the voltage regulator leading-out terminal respectively.
Owing to adopted technique scheme, the obtained technological progress of the utility model is:
Device described in the utility model is a kind of electric network reactive compensation device that improves reactive-load compensator terminal voltage function that has.Voltage regulator both can also can boost in step-down, at the voltage of network system just often, make by computer control device and to cut switch and be connected, make the inductor of reactive-load compensator or capacitor when switching, be in low-pressure state, thereby avoid impact electrical network with the step-down tap of voltage regulator.When system voltage is lower than permissible value, can make by computer control device and cut switch and be connected on the tap that boosts of voltage regulator, be applied with the terminal voltage that approximates load voltage value to capacitor, reactor two ends, even the voltage in network system is lower than under the situation of permissible value like this, can guarantee that still voltage on the reactive-load compensator is near its rated voltage, thereby the reactive power compensation of amount of exports constant volume, thereby can reduce or avoid the generation of voltage collapse effectively.
Reactive-load compensator of the present utility model adopts reactor and the capacitor mode of using in parallel, and access and disconnection by switch control reactor, capacitor, make compensator when needs carry out the perception compensation, realize the perception compensation, when needs carry out capacitive compensation, realize capacitive compensation.
Description of drawings
Fig. 1 is the structural representation that is used for single phase system of the present utility model.
Fig. 2 is the structural representation that is used for three-phase system of the present utility model.
Wherein: 1, voltage regulator, 2, switch, 3, capacitor, 4, switch, 5, reactor, 6, bus, 7, inlet wire, 9, circuit breaker, 10, the winding that boosts, 11, the step-down winding, 12, switch.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further details:
Present embodiment is the wiring regulative mode that the Monophase electric power system is carried out reactive power compensation as shown in Figure 1.Present embodiment comprises a voltage regulator 1, reactive-load compensator and switch 12, and switch 12 is for cutting switch.The inlet wire 7 of voltage regulator 1 is connected with the bus 6 of electric power system by circuit breaker 9, the secondary winding of voltage regulator 1 is arranged to the step-down winding 11 and winding 10 two parts that boost, be respectively arranged with a plurality of step-down taps and a plurality of tap that boosts on the step-down winding 11 and the winding 10 that boosts, the step-down tap all is connected with reactive-load compensator by cutting switch 12 with the tap that boosts.
Reactive-load compensator comprises capacitor 3 and reactor 5, and the front end of capacitor 3 and reactor 5 is in series with switch 2 and 4 respectively, and the inductive reactive power compensation device that capacitive reactive power compensator that capacitor 3 is formed and reactor 5 are formed is a relation in parallel.
Present embodiment as shown in Figure 2, be the reactive power compensator that three-phase electrical power system is regulated. the difference of present embodiment and embodiment 1 is, present embodiment is a three-phase electrical power system, its voltage regulator 1 is a three-phase regulator, and its reactive-load compensator is three group capacitors and three group reactors corresponding with three-phase bus. it cuts switch 12 and switch 2,4 also is threephase switch.
The structure that reactive-load compensator of the present utility model can also be arranged to have only the capacitor branch road or have only the reactor branch road.
Claims (3)
1. electric network reactive compensation device, comprise voltage regulator (1), pass through the reactive-load compensator that switch (12) is connected with voltage regulator (1), it is characterized in that: the leading-out terminal winding of voltage regulator (1) is provided with step-down winding (11) and the winding that boosts (10) simultaneously, step-down winding (11) and the winding that boosts (10) are drawn the step-down tap respectively and the tap that boosts, and the step-down tap is connected with reactive-load compensator by switch (12) with the tap that boosts.
2. electric network reactive compensation device according to claim 1 is characterized in that described reactive-load compensator is the combination of the wherein a kind of of capacitance reactive compensation device or reactance reactive-load compensator or two kinds.
3. according to claim 1 or 2 described electric network reactive compensation devices, it is characterized in that described reactive-load compensator is a capacitance reactive compensation device branch road and the combination in parallel of reactance reactive-load compensator branch road, and the capacitance reactive compensation device connects with the switch that is connected the voltage regulator leading-out terminal (12) by switch (2,4) respectively with the reactance reactive-load compensator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920103520XU CN201466738U (en) | 2009-07-01 | 2009-07-01 | Reactive power compensation device of grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920103520XU CN201466738U (en) | 2009-07-01 | 2009-07-01 | Reactive power compensation device of grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201466738U true CN201466738U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920103520XU Expired - Lifetime CN201466738U (en) | 2009-07-01 | 2009-07-01 | Reactive power compensation device of grid |
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| Country | Link |
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| CN (1) | CN201466738U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702154A (en) * | 2013-12-06 | 2015-06-10 | 广西大学 | Novel soft start device of asynchronous motor |
| CN108092276A (en) * | 2015-07-31 | 2018-05-29 | 庄建平 | A kind of low-voltage circuit voltage and reactive power compensation control device |
-
2009
- 2009-07-01 CN CN200920103520XU patent/CN201466738U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702154A (en) * | 2013-12-06 | 2015-06-10 | 广西大学 | Novel soft start device of asynchronous motor |
| CN108092276A (en) * | 2015-07-31 | 2018-05-29 | 庄建平 | A kind of low-voltage circuit voltage and reactive power compensation control device |
| CN108092276B (en) * | 2015-07-31 | 2021-02-05 | 钱才英 | Low-voltage line voltage reactive compensation control device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |
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| CX01 | Expiry of patent term |