CN202495811U - Power supply circuit for chain-type SVG module - Google Patents
Power supply circuit for chain-type SVG module Download PDFInfo
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- CN202495811U CN202495811U CN2012201514390U CN201220151439U CN202495811U CN 202495811 U CN202495811 U CN 202495811U CN 2012201514390 U CN2012201514390 U CN 2012201514390U CN 201220151439 U CN201220151439 U CN 201220151439U CN 202495811 U CN202495811 U CN 202495811U
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- power supply
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- induction
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Abstract
The utility model relates to a power supply circuit for a chain-type SVG module. The power supply circuit comprises an AC constant-current control power supply, a plurality of current induction receiving circuits and a high-voltage cable, wherein each current induction receiving circuit is composed of a ferrite bead and a coil wound on the ferrite bead, an output end of the AC constant-current control power supply is connected with the high-voltage cable, the high-voltage cable penetrates through the ferrite bead of each current induction receiving circuit, a series connection is formed by the ferrite beads, an input end of each SVG module is connected with an output end of each current induction receiving circuit, each current induction receiving circuit is arranged inside each SVG module, and the ferrite beads are arranged outside the SVG modules. The power supply circuit for the chain-type SVG module can be widely applied in the field of high-voltage reactive power compensation.
Description
Technical field
The utility model relates to a kind of high-voltage power supply circuit, particularly about a kind of power supply circuits that can be used for 35KV direct screening chain type SVG (static reacance generator) module.
Background technology
At present, in the high-pressure reactive compensation field, SVG (static reacance generator) development just like a raging fire, various technology reach its maturity, and increasing practical applications case is arranged.Domestic SVG is main with chain type, and the common direct screening electrical network of the SVG of 6KV, 10KV, 35KV more are the mode that adopts transformer to boost at present.Chain type SVG is made up of some unit modules; Each unit module is a single-phase electricity die mould inverter; Mainly form by H type fully controlled bridge, dc capacitor and a control circuit board; The conducting of control circuit board through the IGBT of optical fiber and Master Communications control H type fully controlled bridge with end, and the fastest fault such as protects on the spot at function.High voltage isolating transformer is normally adopted in the power supply of control circuit board; 10KV such as mains-supplied isolates 220/220 type, because the unit module space is limited, isolating transformer must accomplish as far as possible that volume is little; Therefore isolating transformer manufacturer all takes to add the method for insulating material; But can cause following problem like this: 1, because the transformer detection is destructive testing, cause isolating transformer ex factory pass rate, verification and measurement ratio not high, percent defective is but very high.2, insulating material generates very big parasitic capacitance, possibly cause serious disturbance, is one of unsettled maximum hidden danger in the present engineering of SVG.3, the isolating transformer inlet wire of each unit module all is parallel connection, and wiring is comparatively complicated.4, a whole set of SVG needs the dozens of isolating transformer, and cost is higher.5, for the 35KV direct screening, this mode need be isolated 35KV, and then volume is bigger, and feasibility is extremely low.
Summary of the invention
To the problems referred to above, the purpose of the utility model provides a kind of the easy for installation of chain type SVG module that be used for, and cost is low, and not tape insulation hidden danger and the power supply circuits that disturb hidden danger.
For realizing above-mentioned purpose; The utility model is taked following technical scheme: a kind of power supply circuits that are used for chain type SVG module; It is characterized in that: it comprises interchange constant current control power supply, some induction by current receiving circuits and high-tension cable, and each said induction by current receiving circuit constitutes by ferrite bead and the coil that is wrapped on this ferrite bead; Said interchange constant current control power supply output connects said high-tension cable, and said high-tension cable is located in the ferrite bead of each said induction by current receiving circuit, and each said ferrite bead constitutes cascaded structure; The input of each said SVG module connects each said induction by current receiving circuit output respectively, and each said induction by current receiving circuit is built in respectively in each said SVG module, and said ferrite bead is positioned at the outside of said SVG module; Said interchange constant current control power supply comprises half control rectifier bridge, inductance, dc capacitor and phase-shift voltage regulating inverter bridge; Electric main is rectified into the direct voltage that contains ripple component through said half control rectifier bridge; After said inductance reduces rush of current; Said dc capacitor by being connected in parallel between said half control rectifier bridge two outputs suppresses the ripple component in the direct voltage; Import in the said phase-shift voltage regulating inverter bridge, by the big or small direct voltage that can regulate of said phase-shift voltage regulating inverter bridge output.
The external ring set of the output of said phase-shift voltage regulating inverter bridge is useful on the current sensor that detects its output current value.
Said current sensor adopts Hall current sensor.
Said phase-shift voltage regulating inverter bridge is made up of four full-control type IGBT or MOSFET.
Said half control rectifier bridge is made up of two diodes and two controllable silicons.
The utility model is owing to take above technical scheme; It has the following advantages: 1, the utility model constitutes owing to adopting by exchanging constant current controllable power and several induction by current receiving circuits; Each induction by current receiving circuit constitutes by ferrite bead and the coil that is wrapped on this ferrite bead; Exchange constant current controllable electric power output and connect high-tension cable; High-tension cable is located in each ferrite bead, constitute the induction by current receiving circuit of cascaded structure, and each current receiving circuit is built in respectively in each SVG module.Even single like this SVG module for power supply short circuit or open circuit can not influence the power supply of other SVG modules, and easy construction, on-the-spot needs that high-tension cable is passed each ferrite bead and gets final product.2, the utility model is because the high-voltage cable insulating technology that adopts is very ripe, so the insulation of the utility model is fully feasible.3, therefore the utility model can not form the SVG module and disturb owing to there is not parasitic capacitance.4, the utility model is because the interchange constant current control power supply that adopts has inside and outside two closed loops, and it controls convenient, adjustable wide ranges.5, the utility model is made simply, and cost is low, and overall cost is well below the cost of dozens of isolating transformer.Therefore, the utility model can be widely used in the high-pressure reactive compensation field.
Description of drawings
Fig. 1 is the overall structure sketch map of the utility model;
Fig. 2 is the interchange constant-current supply control circuit sketch map of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is carried out detailed description.
As shown in Figure 1; The utility model provides a kind of power supply circuits that are used for chain type SVG (static reacance generator) module to adopt the mode of series connection; It comprises interchange constant current control power supply 10, some induction by current receiving circuits 20 and high-tension cable 30, and each induction by current receiving circuit 20 constitutes by ferrite bead 21 and the coil 22 that is wrapped on this ferrite bead 21.The output that exchanges constant current control power supply 10 connects high-tension cable 30, and high-tension cable 30 is located in the ferrite bead 21 of each induction by current receiving circuit 20, makes each ferrite bead 21 constitute cascaded structure.Wherein, the input of each SVG module connects the output of each induction by current receiving circuit 20 respectively, is about to each induction by current receiving circuit 20 and is built in respectively in each SVG module, and ferrite bead 21 is positioned at the outside of SVG module.Therefore, the induction by current receiving circuit 20 of each SVG module is connected, and what responded to is same alternating current.
In the foregoing description, the power supply circuits of the utility model itself with high-tension electricity and the insulation between the civil power bear by high-tension cable 30 because prior art medium and high voltage cable 30 insulating processes are very ripe, so the insulation of the utility model is fully feasible.
As shown in Figure 2, the interchange constant current control power supply 10 of the utility model comprises half control rectifier bridge 11, inductance 12, dc capacitor 13 and phase-shift voltage regulating inverter bridge 14.Electric main reduces rush of current in the input inductance 12 after being rectified into the direct voltage that contains ripple component through half control rectifier bridge 11, and by the ripple component in the dc capacitor 13 inhibition direct voltages that are connected in parallel between 11 liang of outputs of half control rectifier bridge.In the direct voltage input phase-shift voltage regulating inverter bridge 14 after the inhibition ripple component, by the direct voltage of phase-shift voltage regulating inverter bridge 14 output adjustable size.
Wherein, current sensor 15 is arranged, be used to detect the current value size of phase-shift voltage regulating inverter bridge 14 outputs at the external ring set of the output of phase-shift voltage regulating inverter bridge 14.The current sensor 15 of the utility model adopts Hall current sensor.
In the foregoing description, half control rectifier bridge 11 is made up of two diodes 111 and two controllable silicons 112, and the magnitude of voltage that electric main is exported behind half control rectifier bridge 11, inductance 12 and dc capacitor 13 is by the conducting angle decision of two controllable silicons 12.
In the foregoing description; Phase-shift voltage regulating inverter bridge 14 is made up of four full-control type IGBT 141; Through regulating the phase difference of IGBT 141 in two brachium pontis, generate the output voltage of different sizes, because 30 bringing onto loads of high-tension cable of output can be regarded as an inductance series resistance; Then its output current is the continuous current of pulsation, and its frequency is by the switching frequency decision of IGBT 141.Can realize adjusting to phase-shift voltage regulating inverter bridge 14 output voltage values size.Wherein, under current power was not very big situation, four full-control type IGBT 141 in the phase-shift voltage regulating inverter bridge 14 can also adopt the MOSFET pipe to replace.
Among above-mentioned each embodiment, exchange constant current control power supply 10 and have inside and outside two closed loops, to guarantee the enough and basic constant current (as shown in Figure 2, dotted line is inside and outside two closed loops among the figure) of institute's output current power.In ring be by the drive circuit of IGBT 141 in measured current closed-loop to the phase-shift voltage regulating inverter bridge 14 of current sensor 15, change the phase shift phase place, the characteristics of interior ring are that frequency is high, speed is fast; Outer shroud is the drive circuit by controllable silicons 112 in measured current closed-loop to the half control rectifier bridge 11 of current sensor 15, changes the conducting angle of controllable silicon 112.For example, when the detection electric current is big inadequately, at first increase the phase difference of IGBT 141, maximum to 180 degree, if to 180 degree, electric current is still not enough, reduces the angle of controllable silicon 112 again, promptly improves the voltage of dc capacitor 13, can be to 0 degree.Therefore, inside and outside two closed loops can guarantee enough wide electric current output adjustable range.
Among above-mentioned each embodiment, if the electric capacity in the induction by current receiving circuit 20 that high-tension cable 30 connects is more for a long time, can be at inductance of output series connection of phase-shift voltage regulating inverter bridge 14.
The utility model is following based on the method for supplying power to of the power supply circuits that are used for chain type SVG:
Exchange the electric current of constant current control power supply 10,, sense the coil 22 on the ferrite bead 21 through the magnetic circuit coupling through high-tension cable 30 output alternations; Generate electromotive force, this electromotive force is the input power supply of each SVG module, and mainly by current amplitude, power frequency, the decision of the magnet ring number of turn: electric current is big more; The electromotive force that then induces is strong more; Therefore, for improving current amplitude, the voltage of input is unsuitable too high; Power frequency is high more, and the electromotive force of induction is strong more, therefore needs to improve the frequency of electric current alternation; And it is high more good more; If overall power is not very big, can select the MOSFET pipe in the phase-shift voltage regulating inverter bridge 14 for use, frequency can be more than 10K; If phase-shift voltage regulating inverter bridge 14 is made up of IGBT, its frequency is not less than 5K; The magnet ring number of turn is many more, and the electromotive force of induction is also strong more.
Above-mentioned each embodiment only is used to explain the utility model; The connection of each parts and structure all can change to some extent; On the basis of the utility model technical scheme; All improvement and equivalents of the connection and the structure of individual component being carried out according to the utility model principle all should not got rid of outside the protection range of the utility model.
Claims (7)
1. power supply circuits that are used for chain type SVG module; It is characterized in that: it comprises interchange constant current control power supply, some induction by current receiving circuits and high-tension cable, and each said induction by current receiving circuit constitutes by ferrite bead and the coil that is wrapped on this ferrite bead; Said interchange constant current control power supply output connects said high-tension cable, and said high-tension cable is located in the ferrite bead of each said induction by current receiving circuit, and each said ferrite bead constitutes cascaded structure; The input of each said SVG module connects each said induction by current receiving circuit output respectively, and each said induction by current receiving circuit is built in respectively in each said SVG module, and said ferrite bead is positioned at the outside of said SVG module.
2. a kind of power supply circuits that are used for chain type SVG module as claimed in claim 1 is characterized in that: said interchange constant current control power supply comprises half control rectifier bridge, inductance, dc capacitor and phase-shift voltage regulating inverter bridge; Electric main is rectified into the direct voltage that contains ripple component through said half control rectifier bridge; After said inductance reduces rush of current; Said dc capacitor by being connected in parallel between said half control rectifier bridge two outputs suppresses the ripple component in the direct voltage; Import in the said phase-shift voltage regulating inverter bridge, by the big or small direct voltage that can regulate of said phase-shift voltage regulating inverter bridge output.
3. a kind of power supply circuits that are used for chain type SVG module as claimed in claim 2 is characterized in that: the external ring set of the output of said phase-shift voltage regulating inverter bridge is useful on the current sensor that detects its output current value.
4. a kind of power supply circuits that are used for chain type SVG module as claimed in claim 3 is characterized in that: said current sensor adopts Hall current sensor.
5. like claim 2 or 3 or 4 described a kind of power supply circuits that are used for chain type SVG module, it is characterized in that: said phase-shift voltage regulating inverter bridge is made up of four full-control type IGBT or MOSFET.
6. like claim 2 or 3 or 4 described a kind of power supply circuits that are used for chain type SVG module, it is characterized in that: said half control rectifier bridge is made up of two diodes and two controllable silicons.
7. a kind of power supply circuits that are used for chain type SVG module as claimed in claim 5 is characterized in that: said half control rectifier bridge is made up of two diodes and two controllable silicons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201514390U CN202495811U (en) | 2012-04-11 | 2012-04-11 | Power supply circuit for chain-type SVG module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201514390U CN202495811U (en) | 2012-04-11 | 2012-04-11 | Power supply circuit for chain-type SVG module |
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| Publication Number | Publication Date |
|---|---|
| CN202495811U true CN202495811U (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201514390U Expired - Fee Related CN202495811U (en) | 2012-04-11 | 2012-04-11 | Power supply circuit for chain-type SVG module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624102A (en) * | 2012-04-11 | 2012-08-01 | 东展科博(北京)电气有限公司 | Power supplying circuit and power supplying method for chain-type SVG (static var generator) modules |
| CN110690734A (en) * | 2019-10-15 | 2020-01-14 | 艾铂科技(湖北)有限公司 | High-voltage sensor induction power supply |
-
2012
- 2012-04-11 CN CN2012201514390U patent/CN202495811U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624102A (en) * | 2012-04-11 | 2012-08-01 | 东展科博(北京)电气有限公司 | Power supplying circuit and power supplying method for chain-type SVG (static var generator) modules |
| CN110690734A (en) * | 2019-10-15 | 2020-01-14 | 艾铂科技(湖北)有限公司 | High-voltage sensor induction power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20160411 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |