CN202513581U - Reactive compensation and power filtering device based on two-stage inductors - Google Patents
Reactive compensation and power filtering device based on two-stage inductors Download PDFInfo
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- CN202513581U CN202513581U CN2012201538709U CN201220153870U CN202513581U CN 202513581 U CN202513581 U CN 202513581U CN 2012201538709 U CN2012201538709 U CN 2012201538709U CN 201220153870 U CN201220153870 U CN 201220153870U CN 202513581 U CN202513581 U CN 202513581U
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- reactor
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- branch road
- reactive power
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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 utility model provides a reactive compensation and power filtering device based on two-stage inductors. The device comprises a reactor set, a filtering capacitor, and a second switch which is connected to a first reactor in a bypass manner, wherein the reactor set and the filtering capacitor are in series connection and are connected with a power line via a first switch, and one end of the second switch is directly connected to the power line. When a branch of the device is switched, the first switch is firstly switched on so that the branch is connected to the power line, and the second switch is in an off state; when time-delay buffering is carried out on the working current of the branch, the second switch is switched on so that two ends of the first reactor are short-circuited; and after time-delay buffering, the first switch is switched off, so that the first reactor exits from the branch, and the branch is changed into an LC circuit and enters a stable reactive compensation state, wherein the LC circuit is composed of a second reactor and the filtering capacitor which are connected in series. The device of the utility model can be applied to reactive compensation and power filtering devices and switching methods of the devices in a power system, especially in a high-voltage system.
Description
Technical field
The invention belongs to the reactive power compensation and the electric filtering technical field of electric power system, particularly a kind of reactive power compensation and power filter device that is used for high-voltage electric power system based on the two-stage inductance.
Technical background
For high pressure (for example 10-35kV) electric power system; When need reactive compensation capacity during at large-scope change; One of traditional scheme is to adopt " forward duty ", and in electric power system, its advantage is simple in structure with the direct switching of single tuning branch road of 6% reactance Rate; But shove when its shortcoming is input big, longer duration, even can excite resonance.Two of scheme is to adopt " reverse operation system "; The employing that is disclosed like the ZL200820135702.0 utility model patent is based on the SVC reactive power compensation scheme of magnetic valve type controllable reactor; Its shortcoming is very little even when being 0 when the reactive power that needs compensation, magnetic valve type controllable reactor absorbs perceptual idle very greatly even be 100%.Because the basic principle of this reactor is a magnetic saturation reactor, it is to utilize supersaturation just can obtain Low ESR, and its vibration this moment, noise are very big, loss is very big and produce bigger harmonic current.
Summary of the invention
To the deficiency of the various schemes of prior art, how the problem that the present invention will solve does not produce when the switching compensation arrangement big shove but can give electric power system enough compensation powers.For this reason, the present invention proposes a kind of reactive power compensation and power filter device based on the two-stage inductance, comprises the reactor group, and said reactor group is composed in series by first reactor and second reactor at least; Also comprise filtering capacitor, said reactor group and filtering capacitor are connected in series and form LC reactive power compensation and electric filtering branch road, and said branch road is connected with power circuit through first switch; It is characterized in that comprise that also the side is connected on the second switch on said first reactor, a tip node of said second switch is directly connected to power circuit.
Further technical scheme can also be that the capacity of said first reactor is less than the capacity of said second reactor.
Further technical scheme can also be said first reactor and the coaxial setting of said second reactor.
Further technical scheme can also be that the two ends of said capacitor are parallel with discharge coil.
Further technical scheme can also be, said branch road is three, and an end of three said branch roads links together and the other end is connected to respectively on three phase lines of power circuit.
Further technical scheme can also be, also comprises power factor controller, and said power factor controller is detecting the action of said first switch of reactive power compensation signal rear drive and said second switch.
According to technique scheme; In the time will dropping into reactive power compensation and electric filtering branch road; Earlier with said first switch closure; Said reactive power compensation and electric filtering propped up initial inductance and the filtering capacitor that said first reactor of route, said second reactor form and were composed in series this moment, and the reactance Rate XK1 of said branch road (%) is big [for example XK1 (%)=12 (%)], and the impulse current of said branch road when input is just less; Through the time-delay buffering of short period, the operating current of said branch road tends towards stability, and this moment is closed with said second switch again; Make the said first reactor short circuit; Even owing to have mutual inductance between said first inductance and said second inductance but mutual inductance is also less, only flow through minimum short circuit current in said first reactor, the time-delay through the short period cushions again; Said first switch is broken off; Said branch road became by second reactor and connected with said filtering capacitor and form this moment, and its reactance Rate XK2 (%) has only XK1 (%) about half [for example XK2 (%)=6 (%)], the stable reactive power compensation operating state of said branch road entering.
Because said branch road does not break from electrical network in transfer process all the time, just the inductance of series connection becomes smaller value by higher value, thereby impulse current (shoving) is little in the transfer process.
According to technique scheme; When needs break away from power circuit with reactive power compensation and electric filtering branch road, with the operation of opposite program, promptly; At first closed said first switch; Cut off said second switch again after the operating current of said branch road cushions through time-delay said first reactor is devoted oneself to work, through said first switch of time-delay buffering back cut-out, make said branch road break away from power circuit fully again.Cut off in the said branch road process like this and also can not cause the impact of big electric current, but also can utilize the switching process of said first switch or said second switch to regulate the reactive power compensation amount automatically power circuit.Can certainly directly at first cut off said second switch directly breaks away from said branch road from power circuit.
According to technique scheme, said branch road can and insert in the same phase line of power circuit for several simultaneously, needs how many idle how many bar branch roads of just throwing; Or insert respectively in the out of phase phase line.
Because the present invention has These characteristics and advantage, can be applied to electric power system particularly in the reactive power compensation and power filter device and operation/cutting method thereof of high-pressure system.
Description of drawings
Fig. 1 is a structural representation of using a branch road of technical scheme of the present invention;
Fig. 2 is the structural representation that three branch roads of application technical scheme of the present invention are connected to three-phase line respectively;
Embodiment
As shown in Figure 1, reactive power compensation and power filter device based on the two-stage inductance comprise the reactor group, and said reactor L group is by being composed in series before and after the first reactor L1 and the second reactor L2; Also comprise filtering capacitor C; LC reactive power compensation and electric filtering branch road that said reactor group L and filtering capacitor C are connected in series and form; Said branch road is connected with the A of power circuit through the first K switch M1, and the two ends of said filter capacitor C also are parallel with discharge coil Lf.The said first reactor L1 and the second reactor L2 are air core inductor and coaxial stacking, between the two mutual inductance M less (general mutual inductance M be greatly inductance value 10%).Certainly the said first reactor L1 and the second reactor L2 also can be separate fully two reactors independently separately, but adopt the cost of coaxial reactance low.
Also comprise second switch KM2; The tip node of said second switch KM2 is directly connected to the A phase of power circuit; Another end points is connected on the connecting point position a between said first reactor L1 and the said second reactor L2, and said like this second switch KM2 constitutes the other access node structure to the said first reactor L1.Said first K switch M1 and said second switch KM2 are in off-state when unloaded.
Also comprise power factor controller K, when said power factor controller K detects circuit and needs reactive power compensation, utilize PLC control to send instruction automatically and drive said first K switch M1 and said second switch KM2 sequentially-operating.
When requiring said branch road to drop into, power factor controller K sends instruction, and it is closed to drive the said first K switch M1; The reactance Rate XK1 (%) of said branch road is by initial inductance L12 (L12=L1+L2+2M at this moment; M is the mutual inductance between L1 and L2) and the electric capacity of filtering capacitor C confirm, XK1 (%)=12 (%) for example, impulse current is very little during input; When the effluxion t1 of the said first K switch M1 make delay buffering second electric current of said branch road is tended towards stability or complete stability after after (for example t1=30 second); Closed more said second switch KM2 with the said first reactor L1 short circuit (bypass), flows through the little short circuit current of being confirmed by said second reactor L2 and M in the said first reactor L1; Said branch road tend towards stability through t2 electric current second or complete stability after after (for example t2=10 second); The said first K switch M1 breaks off the said first reactor L1, and this moment, said said second reactor KM2 of route and filtering capacitor C were in series, and its reactance Rate is XK2 (%); XK2 (%)=6 (%) for example, said branch road gets into stable reactive power compensation running status.
When require said branch road from reactance Rate be the steady operational status (for example XK2 (%)=6 (%)) of XK2 (%) when withdrawing from electrical network, power factor controller K sends instruction, said second switch KM2 breaks off, said branch road withdraws from compensation.Also can be that the earlier closed said first K switch M1 breaking off said second switch KM2 through time-delay buffering back, through after the time-delay buffering, breaks off the said first K switch M1 more at last.
Secondly; K sends instruction according to power factor controller, and said branch road can be changed between dropping into and withdrawing from, and when the reactance Rate of branch road described in the corresponding input process begins, is XK1 (%) (bigger); Through less time-delay; Its reactance Rate becomes XK2 (%) (less), gets into steady operational status, so constantly the reactive power of the said Zhi Luxiang power circuit conveying of adjustment.
Be short time duty wherein owing to the said first reactor L1, can its Capacity design is very little, less than the capacity of the said second reactor KM2, cost is very low for this reason at least.
Reactance Rate XK2 (%) for said branch road; Can confirm according to the requirement of filtering, for example will weaken 5,7 subharmonic of three-phase electrical power system, can select for use about XK2 (%)=6%; Weaken 3 subharmonic of Monophase electric power system, can select for use about XK2 (%)=12%.Also different reactance Rate can be set for many branch roads, with the different times harmonics of filtering.
As shown in Figure 2, be the structural representation that three said branch roads are applied to the three-phase power circuit.Wherein said first K switch M1 or said second switch KM2 are respectively coaxial threephase switch, and the tail end O of three said branch roads links together, and the A phase, B that an other end is connected on power circuit respectively mutually and C mutually in the circuit.
The present invention not only is confined to above-mentioned embodiment; Persons skilled in the art are according to content disclosed by the invention; Can adopt other multiple embodiment embodiment of the present invention, therefore, every employing project organization of the present invention and thinking; Do some simple designs that change or change, all fall into the scope of the present invention's protection.
Claims (6)
1. based on the reactive power compensation and the power filter device of two-stage inductance, comprise the reactor group, said reactor group is composed in series by first reactor and second reactor at least; Also comprise filtering capacitor, said reactor group and filtering capacitor are connected in series and form LC reactive power compensation and electric filtering branch road, and said branch road is connected with power circuit through first switch; It is characterized in that comprise that also the side is connected on the second switch on said first reactor, a tip node of said second switch is directly connected to power circuit.
2. reactive power compensation and power filter device based on the two-stage inductance according to claim 1 is characterized in that the capacity of said first reactor is less than the capacity of said second reactor.
3. reactive power compensation and power filter device based on the two-stage inductance according to claim 1 is characterized in that, said first reactor and the coaxial setting of said second reactor.
4. reactive power compensation and power filter device based on the two-stage inductance according to claim 1 is characterized in that the two ends of said capacitor are parallel with discharge coil.
5. according to claim 1,2,3 or 4 described reactive power compensation and power filter devices based on the two-stage inductance, it is characterized in that said branch road is three, an end of three said branch roads links together and the other end is connected to respectively on three phase lines of power circuit.
6. reactive power compensation and power filter device based on the two-stage inductance according to claim 5; It is characterized in that; Also comprise power factor controller, said power factor controller is detecting the action of said first switch of reactive power compensation signal rear drive and said second switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201538709U CN202513581U (en) | 2012-04-05 | 2012-04-05 | Reactive compensation and power filtering device based on two-stage inductors |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201538709U CN202513581U (en) | 2012-04-05 | 2012-04-05 | Reactive compensation and power filtering device based on two-stage inductors |
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| CN202513581U true CN202513581U (en) | 2012-10-31 |
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| CN2012201538709U Expired - Lifetime CN202513581U (en) | 2012-04-05 | 2012-04-05 | Reactive compensation and power filtering device based on two-stage inductors |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167978A (en) * | 2013-05-20 | 2014-11-26 | 安川电机（中国）有限公司 | Motor control device and motor driving system |
| CN104993500A (en) * | 2015-07-30 | 2015-10-21 | 国网山东省电力公司经济技术研究院 | Reactive compensation apparatus and parameter determining method thereof |
| CN111147020A (en) * | 2020-01-16 | 2020-05-12 | 张雁 | High-power LC oscillating circuit |
-
2012
- 2012-04-05 CN CN2012201538709U patent/CN202513581U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167978A (en) * | 2013-05-20 | 2014-11-26 | 安川电机（中国）有限公司 | Motor control device and motor driving system |
| CN104993500A (en) * | 2015-07-30 | 2015-10-21 | 国网山东省电力公司经济技术研究院 | Reactive compensation apparatus and parameter determining method thereof |
| CN111147020A (en) * | 2020-01-16 | 2020-05-12 | 张雁 | High-power LC oscillating circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211227 Address after: 528000 No. 4, Huanzhen East Road, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee after: FOSHAN SHUNDE EAGLERISE ELECTRIC POWER TECHNOLOGY Co.,Ltd. Patentee after: JI'AN IGOR ELECTRIC Co.,Ltd. Patentee after: Ji'an Igor magnetoelectric Technology Co.,Ltd. Patentee after: EAGLERISE ELECTRIC & ELECTRONIC (CHINA) Co.,Ltd. Address before: 528000, A3, Guicheng science and Technology Park, Jian Ping Road, Nanhai District, Guangdong, Foshan Patentee before: EAGLERISE ELECTRIC & ELECTRONIC (CHINA) Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |