CN1402408A - High performance reactive power compensation circuit - Google Patents
High performance reactive power compensation circuit Download PDFInfo
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- CN1402408A CN1402408A CN02137002A CN02137002A CN1402408A CN 1402408 A CN1402408 A CN 1402408A CN 02137002 A CN02137002 A CN 02137002A CN 02137002 A CN02137002 A CN 02137002A CN 1402408 A CN1402408 A CN 1402408A
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- harmonic current
- capacitor
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- reactor
- transformer
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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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- 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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The characteristics of the invented circuit contains the harmonic current damping circuit, which includes the reactor, the capacitor and the resistance, or incldues the transformer, the reactor, the capacitor and the resistance. The harmonic current damping circuit is connected to the reactive compensator or the reactive generator in serial. Both of them to together with the load are connected to the power of the electric network in paralle. Comparing with the prior art, the advantages of the invention are as follows. (1) The resonance happened between the electric network or load and the reactive compensator or the reactive generator can be restrained effectively. (2) The harmonic current generated by the reactive compensator or the reactive generator possible to feed into the electric network is blocked. (3) Stable operation and good cost performance ratio.
Description
Technical field
The present invention relates to a kind of device of compensating power, particularly a kind of high performance reactive power compensation circuit.
Background technology
A large amount of uses of inductive load or capacitive load all can cause the decline of power factor of electric network, for the economical operation of electrical network, all will carry out reactive power compensation or adjusting usually.Reactive power compensation or adjusting at present has dual mode: the one, and fixing or grading compensation or adjusting, its control is simple, but used reactive-load compensator or adjuster may and network system impedance and load impedance between resonance takes place, influence the network system reliability of operation; The 2nd, idle dynamic is regulated, its advantage is effectively to suppress contingent resonance between reactive-load compensator or adjuster and network system impedance and the load impedance, and can carry out the smooth adjustment of reactive power, but control is complicated, the equipment price costliness may produce additional harmonic current and inject electrical network.Fig. 1 is for existing reactive power and connect the compensating circuit block diagram.
Summary of the invention
The object of the present invention is to provide a kind of high performance reactive power compensation circuit, this compensating circuit can stop reactive power compensator or the issuable harmonic current of adjuster to inject electrical network, can suppress contingent resonance between reactive power power compensator or adjuster and the electrical network again, the compensating circuit reliable operation, has the good ratio of performance to price, its reason is that the harmonic current antihunt circuit 4 in this compensating circuit is the zero impedance circuit for fundamental current, and is high impedance circuit for harmonic current.Fig. 2 is a reactive power compensation circuit block diagram of the present invention.Mark 4 is the harmonic current antihunt circuit among the figure.
A kind of high performance reactive power compensation circuit, comprise single-phase/or three phase network power supply 1, load 2, reactive-load compensator/or reacance generator 3, it is characterized in that: be provided with a harmonic current antihunt circuit 4, this circuit is formed by reactor, capacitor, resistance or by transformer, reactor, capacitor, resistance, harmonic current antihunt circuit 4 and reactive-load compensator/or reacance generator 3 be serially connected, and together be attempted by in the loop of electric network source 1 with load 2.The harmonic current antihunt circuit of being made up of passive device 4 comprises following structure:
1) harmonic current antihunt circuit 4 is made up of reactor L1, capacitor C1, resistance R 1, and wherein capacitor C1, reactor L1 are connected in series back and resistance R 1 and connect, as shown in Figure 3.
2) harmonic current antihunt circuit 4 is made up of transformer T1, reactor L1, capacitor C1, resistance R 1, wherein its two ends, the former limit of transformer T1 respectively with electrical network and reactive-load compensator/or reacance generator 3 be connected, be attempted by the two ends of transformer T1 secondary after capacitor C1, the reactor L1 serial connection with resistance R 1, as shown in Figure 4.
3) harmonic current antihunt circuit 4 is made up of reactor L1～L3, capacitor C1～C3, resistance R 1～R3, form three harmonic current antihunt circuit branch roads respectively, the two ends of each branch road respectively with electrical network each mutually with reactive-load compensator/or each circuitry phase branch road of reacance generator 3 be connected, as shown in Figure 5.
4) harmonic current antihunt circuit 4 is made up of transformer T1～T3, reactor L1～L3, capacitor C1～C3, resistance R 1～R3, form three harmonic current antihunt circuit branch roads respectively, its two ends, the former limit of transformer in three branch roads respectively with electrical network each mutually with reactive-load compensator/or each circuitry phase branch road of reacance generator 3 be connected, be attempted by the two ends of transformer secondary after capacitor, the reactor serial connection with resistance, as shown in Figure 6.
5) harmonic current antihunt circuit 4 is made up of reactor L1～L3, capacitor C1～C3, resistance R 1～R3, form three harmonic current antihunt circuit branch roads, one end of three branch roads interconnects, the other end of three branch roads respectively with reactive-load compensator/or the corresponding serial connection of each circuitry phase branch road of reacance generator 3 after, respectively be connected with electrical network respectively, as shown in Figure 7.
6) harmonic current antihunt circuit 4 is made up of transformer T1～T3, reactor L1～L3, capacitor C1～C3, resistance R 1～R3, form three harmonic current antihunt circuit branch roads, one end on the former limit of transformer in three branch roads interconnects, the other end respectively with reactive-load compensator/or the corresponding serial connection of each circuitry phase branch road of reacance generator 3 after, respectively be connected with electrical network respectively, reactor in each branch road is attempted by on this branch road transformer secondary, as shown in Figure 8 with resistance behind capacitor series
Transformer, reactor, capacitor, protection switch or its combination can be set up in harmonic current antihunt circuit 4 in the foregoing circuit or its branch road and two ends; Can with on the transformer secondary of harmonic current antihunt circuit 4 or its branch road and the resistance that connects shift and to be attempted by on the former limit of this transformer, also can be on former limit of the transformer of harmonic current antihunt circuit 4 or its branch road and secondary simultaneously and connecting resistance or variable resistor, protection switch or its combination.
With prior art relatively, advantage of the present invention is: 1) can suppress effectively electrical network or load and reactive-load compensator/or reacance generator between contingent resonance; 2) stop reactive-load compensator/or the issuable harmonic current of reacance generator inject electrical network; 3) reliable operation has the good ratio of performance to price.
Description of drawings
Fig. 1 is for existing reactive power and connect the compensating circuit block diagram.
Fig. 2 is a reactive power compensation circuit block diagram of the present invention.Mark 4 is the harmonic current antihunt circuit among the figure.
Fig. 3 is a kind of single-phase reactive power compensation circuit figure.
Fig. 4 is another kind of single-phase reactive power compensation circuit figure.
Fig. 5 is a kind of three phase reactive power compensating circuit figure.
Fig. 6 is second kind of three phase reactive power compensating circuit figure.
Fig. 7 is the third three phase reactive power compensating circuit figure.
Fig. 8 is the 4th kind of three phase reactive power compensating circuit figure.
Embodiment
A kind of high performance reactive power compensation circuit, as shown in Figure 3, single-phase load is the 100KVA inductive load, its power factor is 0.7, reactive-load compensator 3 adopts the variable capacitor group of capacitance, reactor L1=200mH in the harmonic current antihunt circuit 4, capacitor C1=55.7uF, resistance R 1=300 Ω.During the volume change of capacitor group, just might with network system generation serial or parallel connection resonance because the existence of harmonic current antihunt circuit 4 is arranged, can prevent the generation of this type of resonance, guarantee the safe operation of network system.
A kind of high performance reactive power compensation circuit, as shown in Figure 6, threephase load is the 100KVA inductive load, its power factor is 0.7, reactive-load compensator 3 adopts three capacitor groups that capacitance is variable, the transformer T1=T2=T3=1KVA in the harmonic current antihunt circuit 4, reactor L1=L2=L3=200mH, capacitor C1=C2=C3=55.7uF, resistance R 1=R2=R3=300 Ω.When the volume change of capacitor group, just might with network system generation serial or parallel connection resonance because the existence of harmonic current antihunt circuit 4 is arranged, can prevent the generation of this type of resonance, guarantee the safe operation of three phase network.
A kind of high performance reactive power compensation circuit, as shown in Figure 8, threephase load is the 100KVA inductive load, its power factor is 0.7, reactive-load compensator 3 adopts three capacitor groups that capacitance is variable, the transformer T1=T2=T3=1KVA in the harmonic current antihunt circuit 4, reactor L1=L2=L3=200mH, capacitor C1=C2=C3=55.7uF, resistance R 1=R2=R3=300 Ω.When the volume change of capacitor group, just might with network system generation serial or parallel connection resonance because the existence of harmonic current antihunt circuit 4 is arranged, can prevent the generation of this type of resonance, guarantee the safe operation of three phase network.
Claims (9)
1. high performance reactive power compensation circuit, comprise single-phase/or three phase network power supply (1), load (2), reactive-load compensator/or reacance generator (3), it is characterized in that: be provided with a harmonic current antihunt circuit (4), this circuit is made up of reactor, capacitor, resistance or transformer, reactor, capacitor, resistance, harmonic current antihunt circuit (4) and reactive-load compensator/or be serially connected ， And and load (2) of reacance generator (3) together be attempted by in the loop of electric network source (1).
2. reactive power compensation circuit according to claim 1, it is characterized in that: harmonic current antihunt circuit (4) is made up of reactor (L1), capacitor (C1), resistance (R1), and wherein capacitor (C1), reactor (L1) are connected in series back and resistance (R1) and connect.
3. reactive power compensation circuit according to claim 1, it is characterized in that: harmonic current antihunt circuit (4) is made up of transformer (T1), reactor (L1), capacitor (C1), resistance (R1), wherein its two ends, the former limit of transformer (T1) respectively with electric network source (1) and reactive-load compensator/or reacance generator (3) be connected, capacitor (C1), reactor (L1) serial connection back are attempted by the two ends of transformer (T1) secondary with resistance (R1).
4. reactive power compensation circuit according to claim 1, it is characterized in that: harmonic current antihunt circuit (4) is by reactor (L1～L3), capacitor (C1～C3), resistance (R1～R3) form, form three harmonic current antihunt circuit branch roads respectively, the two ends of each branch road respectively with electrical network each mutually with reactive-load compensator/or each circuitry phase branch road of reacance generator (3) be connected.
5. reactive power compensation circuit according to claim 1, it is characterized in that: harmonic current antihunt circuit (4) is by transformer (T1～T3), reactor (L1～L3), capacitor (C1～C3), resistance (R1～R3) form, form three harmonic current antihunt circuit branch roads respectively, its two ends, the former limit of transformer in three branch roads respectively with electrical network each mutually and reactive-load compensator/or each circuitry phase branch road of reacance generator (3) be connected, capacitor, reactor are connected in series the two ends that afterwards are attempted by the transformer secondary with resistance.
6. reactive power compensation circuit according to claim 1, it is characterized in that: harmonic current antihunt circuit (4) is by reactor (L1～L3), capacitor (C1～C3), resistance (R1～R3) form, form three harmonic current antihunt circuit branch roads, one end of three branch roads interconnects, the other end of three branch roads respectively with reactive-load compensator/or the corresponding serial connection of each circuitry phase branch road of reacance generator (3) after, respectively be connected with electrical network respectively.
7. reactive power compensation circuit according to claim 1, it is characterized in that: harmonic current antihunt circuit (4) is by transformer (T1～T3), reactor (L1～L3), capacitor (C1～C3), resistance (R1～R3) form, form three harmonic current antihunt circuit branch roads, one end on the former limit of transformer in three branch roads interconnects, the other end respectively with reactive-load compensator/or the corresponding serial connection of each circuitry phase branch road of reacance generator (3) after, respectively be connected with electrical network respectively, the reactor in each branch road is attempted by on this branch road transformer secondary with resistance behind capacitor series.
8. according to any reactive power compensation circuit in the claim 2～7, it is characterized in that: transformer, reactor, capacitor, protection switch or its combination can be set up in harmonic current antihunt circuit (4) or its branch road and two ends.
9. according to any reactive power compensation circuit in the claim 3,5,7; it is characterized in that: can with on the transformer secondary of harmonic current antihunt circuit (4) or its branch road and the resistance that connects shift and to be attempted by on the former limit of this transformer, also can be on the former limit of transformer of harmonic current antihunt circuit (4) or its branch road and secondary simultaneously and connecting resistance or variable resistor, protection switch or its combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02137002A CN1402408A (en) | 2002-09-11 | 2002-09-11 | High performance reactive power compensation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02137002A CN1402408A (en) | 2002-09-11 | 2002-09-11 | High performance reactive power compensation circuit |
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| CN1402408A true CN1402408A (en) | 2003-03-12 |
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| CN02137002A Pending CN1402408A (en) | 2002-09-11 | 2002-09-11 | High performance reactive power compensation circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384046C (en) * | 2005-09-20 | 2008-04-23 | 山东科技大学 | High voltage reactive-load compensation complete equipment |
| CN101860034A (en) * | 2009-04-03 | 2010-10-13 | 通用电气公司 | The bucking-out system that is used for electric power transfer |
| PL424114A1 (en) * | 2017-12-29 | 2019-07-01 | Politechnika Krakowska im. Tadeusza Kościuszki | Pulsed current feed system for the six-electrode arc furnace |
-
2002
- 2002-09-11 CN CN02137002A patent/CN1402408A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384046C (en) * | 2005-09-20 | 2008-04-23 | 山东科技大学 | High voltage reactive-load compensation complete equipment |
| CN101860034A (en) * | 2009-04-03 | 2010-10-13 | 通用电气公司 | The bucking-out system that is used for electric power transfer |
| PL424114A1 (en) * | 2017-12-29 | 2019-07-01 | Politechnika Krakowska im. Tadeusza Kościuszki | Pulsed current feed system for the six-electrode arc furnace |
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