CN2388763Y - Reactive power compensator - Google Patents
Reactive power compensator Download PDFInfo
- Publication number
- CN2388763Y CN2388763Y CN 99218948 CN99218948U CN2388763Y CN 2388763 Y CN2388763 Y CN 2388763Y CN 99218948 CN99218948 CN 99218948 CN 99218948 U CN99218948 U CN 99218948U CN 2388763 Y CN2388763 Y CN 2388763Y
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- power factor
- capacitor
- compensator
- reactive power
- power
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Abstract
The utility model belongs to the technical field of the power engineering. The utility model provides a reactive power compensator which has the advantages of reasonable design, simple structure and strong practicability and can ensure that the power factor is fixed stably on the given value for overcoming the stubborn technical problems that the large surge, the abortion voltage fluctuation, the transient excess harmonics, etc., are generated unavoidably by switching the capacitance existing in the method which uses an incorporation capacitor for improving the power factor. The utility model is composed of a compensation transformer, a capacitor, a voltage regulator, a power factor controller, a voltage regulating control executor, etc.
Description
The utility model belongs to the power engineering field, particularly a kind of reactive power compensator.
In the existing power system, many power consumption equipments all are inductive, and system's natural power factor is low excessively.In identical supply network, if power factor is low, more send out, for, controller switching equipment capacity taking, electric energy can not fully effectively be utilized.For Mi mends this class problem, often adopt the way compensating power of shunt capacitor in circuit on the engineering, improve power factor, because the reactive power Q that electric capacity provides
c=U
2ω C, the value that changes electric capacity just can change reactive power Q
cSize, reach the purpose that improves power factor.So its principle of the power factor auto-control system that extensively adopts both at home and abroad realizes with the method for incorporating electric capacity at present, as shown in Figure 1, what that controller comes that control capacitor incorporates into according to detected COS φ value are power factor detect, and power factor COS φ is stabilized on a certain higher set-point as much as possible.The method that this usefulness is incorporated electric capacity into improves power factor COS φ, produce huge shoving and thorny technical problems such as voltage fluctuation in half a lifetime, transient overshoot harmonic wave and switching overvoltage when existing switching capacitance inevitably, have to take corresponding technical measures for addressing these problems, also will increase some necessary equipment; Because switched capacitor is one group one group, has caused the discontinuity of power factor controlling.
The purpose of this utility model is exactly in order to overcome the problems referred to above, and reactive power compensator a kind of simple in structure, practical is provided.
In order to finish above-mentioned task, the utility model is achieved in that because the reactive power Q that electric capacity provides
c=U
c 2ω C when the value of given electric capacity, adopts to change the voltage that is added in the electric capacity two ends, also can change reactive power Q
cSize, reach the purpose that improves power factor.
For reaching this purpose, reactive power compensator of the present utility model is to be made of compensator transformer, capacitor, voltage regulator, power factor controller, Regulation Control actuator etc., being connected between capacitor and the electrical network of compensator transformer output stage series connection, the compensator transformer input stage connects with the voltage regulator output stage, and the two ends of voltage regulator are connected with electrical network and with reference to zero potential respectively.Capacitor also can be connect or corner connection constitutes by several minutes capacitor star.The input stage of compensator transformer inserts the voltage regulator output stage after being subjected to the control of Regulation Control actuator.The power factor controller output is connected with Regulation Control actuator input; On the detecting element that the input of power factor controller is connected on electrical network is connected.
Because a termination of capacitor has been gone into compensator transformer, the voltage U at capacitor two ends in the such scheme
cBe exactly the stack of line voltage U and compensator transformer output voltage Δ U, i.e. U
c=U+ Δ U when the capacitance of capacitor is a certain set-point, changes size and the positive-negative polarity of Δ U, just can change reactive power Q
c=U
c 2ω C size reaches the purpose that improves power factor COS φ.The reactive power that voltage system changes compensation is adjusted in this employing, and the adjustment of its voltage has relative continuity, but the relative stability of guaranteed output factor.Do not produce and shove and problems such as voltage fluctuation in half a lifetime, overvoltage and transient overshoot harmonic wave.
Further specify the such scheme implementation process below in conjunction with accompanying drawing;
Fig. 1 is the reactive power compensation principle schematic in using at present;
As shown in Figure 1, the signal that power factor controller 1 provides according to detecting element 5, calculate control switch 3 after the power factor in the middle of the electrical network 4, promptly the switching amount of control capacitor 2 improves the power factor COS φ in the electrical network 4.
Fig. 2 is the operation principle schematic diagram of the utility model reactive power compensator;
As shown in Figure 2, provide the three-phase alternating current of 630kAV online at power supply, we survey The power factor that arrives is only for=0.75, when inserting one by 100kAV compensator transformer 1, three groups 30kvar capacitor 2, pressure regulator 4, power factor controller 5, Regulation Control actuator 3 etc. Behind the three phase reactive power compensator that consists of, just can actually adjust to powerfactorcosφ fully=0.98. We have adopted the as shown in Figure 2 three phase reactive power of circuit formation to realize this process Compensator, an end of 1 three output stages of compensator transformer in this compensator respectively with three groups of 30kvar Capacitor 2 be connected, three group capacitors 2 form stars and connect, the star contact is connected on reference on the zero potential. The other end of 1 three output stages of compensator transformer inserts three-phase alternating current electrical network 7, compensator transformer 1 Three input stages link with pressure regulator 4 outputs respectively, its tie point is carried out by Regulation Control Device 3 controls, three input stage two ends of pressure regulator 4 are respectively with three phase network 7 and with reference to zero potential Be connected. Three-phase activity coefficient controller 5 outputs are connected with Regulation Control actuator 3, and are defeated Entering end is connected with three-phase alternating current electrical network 7 by detecting element 6. Its operation principle is: when given During the power factor value of power factor controller 5 a certain settings, power factor controller 5 is by right The signal that detecting element 6 provides carries out data to be processed, and judges simultaneously, if power factor is inclined to one side During from a certain setting value, signal of power factor controller 5 outputs is given Regulation Control actuator 3, Regulation Control actuator 3 is controlled pressure regulator 4 outputs according to this signal and is offered the compensation transformation The voltage of device 1 input makes reactive power Qc＝(U+ΔU)
2ω C is because of the size of Δ U Change and change with positive-negative polarity, reach the purpose that improves power factor, and constant in a certain given On the value.
Claims (4)
1. reactive power compensator that constitutes by compensator transformer, capacitor, voltage regulator, power factor controller, Regulation Control actuator etc., it is characterized in that compensator transformer (1) output stage is serially connected between capacitor (2) and the electrical network (7), compensator transformer (1) input stage connects with voltage regulator (4) output stage, and voltage regulator (4) input stage two ends are connected with electrical network (7) and with reference to zero potential respectively.
2. reactive power compensator as claimed in claim 1 is characterized in that capacitor (2) can be connect or corner connection constitutes by several minutes capacitor star.
3. reactive power compensator as claimed in claim 1 is characterized in that compensator transformer (1) input stage is subjected to the control of Regulation Control actuator (3) when inserting the output stage of voltage regulator (4).
4. reactive power compensator as claimed in claim 1 is characterized in that power factor controller (5) output is connected with Regulation Control actuator (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99218948 CN2388763Y (en) | 1999-07-30 | 1999-07-30 | Reactive power compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99218948 CN2388763Y (en) | 1999-07-30 | 1999-07-30 | Reactive power compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2388763Y true CN2388763Y (en) | 2000-07-19 |
Family
ID=34010003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99218948 Expired - Fee Related CN2388763Y (en) | 1999-07-30 | 1999-07-30 | Reactive power compensator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2388763Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615806B (en) * | 2009-07-29 | 2011-12-07 | 广西诺斯贝电气有限公司 | Phase-control reactive power dynamic compensation device and compensation method thereof |
-
1999
- 1999-07-30 CN CN 99218948 patent/CN2388763Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615806B (en) * | 2009-07-29 | 2011-12-07 | 广西诺斯贝电气有限公司 | Phase-control reactive power dynamic compensation device and compensation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |