CN203608077U - Filter circuit for serial-connection parts of SSSC (static synchronous series compensator) and UPQC (unified power quality controller) - Google Patents
Filter circuit for serial-connection parts of SSSC (static synchronous series compensator) and UPQC (unified power quality controller) Download PDFInfo
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- CN203608077U CN203608077U CN201320823531.1U CN201320823531U CN203608077U CN 203608077 U CN203608077 U CN 203608077U CN 201320823531 U CN201320823531 U CN 201320823531U CN 203608077 U CN203608077 U CN 203608077U
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Abstract
The utility model relates to a filter circuit, and specifically relates to a filter circuit for the serial-connection parts of the SSSC and the UPQC. The filter circuit is connected with an inversion-side series part of the SSSC, or an inversion-side series-connection part of the UPQC. The filter circuit comprises an LC filter circuit, a pi-type filter circuit, an LCC or LCCR series-parallel filter circuit, an LCL series-parallel filter circuit, and a C-type filter. The filter circuit provided by the utility model employs the filter circuits in an RCL series-parallel resonance mode for filtering the high-frequency current harmonic waves generated by current converters of the SSSC and the UPQC, inhibits an overlarge change rate of current, improves the output precision of a device, and improves the performance of the device.
Description
Technical field
The utility model relates to a kind of filter circuit, is specifically related to a kind of filter circuit for SSSC and UPQC series connection part.
Background technology
Static Series Synchronous Compensator SSSC(Static Synchronous Series Compensator) be the static synchronous reactive-load compensation equipment that does not contain external power source, be connected on the voltage that transmission line produces with line current is orthogonal, amplitude is controlled, can change line voltage distribution grade and self input, exit status, thereby electric network composition and topological state are adjusted, generally not changing line voltage distribution grade and Basic Topological, is equivalent adjustment line impedance and voltage.
Unified Power Quality Controller UPQC main circuit is made up of series-type voltage source type converter and shunt voltage source type converter.UPQC is as powerful electric energy quality synthesis compensation apparatus, and its series side has dynamic electric voltage recovery device DVR, dynamic uninterrupted power supply DUPS function, and side in parallel has static reacance generator SVG, Active Power Filter-APF APF function.It can absorb the harmonic wave of load side, can compensate fast again that voltage in supply power voltage falls, the short time voltage when imbalance of fluctuation and flickering, each phase voltage and fault interrupts, and has the function to quality of power supply comprehensive regulation.
Filter circuit is usually used in the ripple in elimination inverter output voltage, generally formed by reactance component, as at load resistance two ends shunt capacitor C, or with load series reactor L, and by electric capacity, inductance forms the various compound filter circuit forming.The output voltage of rectification circuit is not pure direct current, observes the output of rectification circuit from oscilloscope, differs greatly with direct current, contains larger ripple component in waveform, is called ripple.For obtaining more satisfactory direct voltage, need to utilize the filter circuit of reactive components (as electric capacity, the inductance) composition with energy storage effect to carry out the high-frequency harmonic in filtering output voltage.
Existing traditional SSSC, UPQC series connection partial circuit often adopts the mode of tandem electric inductance, and simple structure cost is lower, but often filter effect is not ideal enough, and output current also contains certain ripple.Suitable selection L, C, the filter circuit of R combination can more effectively solve filtering problem.
The basic principle that the device of SSSC is controlled transmission system is to inject one to circuit to differ the controllable voltage of 90 degree with line current, with the effective impedance of quick control circuit, thereby carries out efficient system control.It is most important for device control performance and cost etc. whether device outlet side contains filter, and filter is mainly followed the tracks of controlling unit design to contravarianter voltage and had the greatest impact, and is therefore adding in filter circuit situation, need to rethink control strategy.And the cooperation of UPQC and passive filtration unit.Use separately UPQC to provide effective solution for low capacity occasion, but for jumbo requirement, cost pressure sharply increases, therefore mix with passive filter and form mixed type electric energy quality regulator and be applied to large capacity occasion and become a kind of scheme of high performance-price ratio, series connection part is mainly used in the improvement of power quality problem, and provides a high impedance path to stop Load harmonic current direction system for Load harmonic electric current.
Partly on topological structure, have suitable similarity because SSSC connects with UPQC, therefore the design of filter of the two also communicates substantially.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of filter circuit for SSSC and UPQC series connection part, the utility model adopts the filter circuit of RCL series parallel resonance mode for the high-frequency harmonic of elimination SSSC, UPQC converter generation current, and suppress excessive current changing rate, improve device output accuracy, improve device performance.
The purpose of this utility model is to adopt following technical proposals to realize:
The utility model provides a kind of filter circuit for SSSC and UPQC series connection part, and described filter circuit is connected with the series connection part of the inversion side of Static Series Synchronous Compensator SSSC or is connected with the series connection part of the inversion side of Unified Power Quality Controller UPQC; Its improvements are, described filter circuit comprises LC filter circuit, π type filter circuit, LCC or LCCR connection in series-parallel filter circuit, LCL connection in series-parallel filter circuit and C mode filter.
Further, described LC filter circuit is low-pass filter circuit, for the filtering of high-frequency signal, formed by inductance L and capacitor C, described inductance L is connected with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC, described capacitor C and the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC.
Further, described π type filter circuit is by inductance L ', capacitor C1 and capacitor C2 form, described inductance L ' connect with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC, described capacitor C1 and capacitor C2 all with the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC.
Further, described LCC or LCCR connection in series-parallel filter circuit are by inductance L ' ', capacitor C3 and CR series arm form, described inductance L ' ' connect with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC, described capacitor C3 and CR series arm all with the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC;
Described CR series arm is made up of the capacitor C4 connecting and damping resistance R.
Further, described LCL connection in series-parallel filter circuit is by L
1r
tseries arm, L
2r
lseries arm and capacitor C5 composition; Described L
1r
tseries arm and L
2r
lseries arm is all connected with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC; Described capacitor C5 and the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC;
Described L
1r
tseries arm is by the inductance L of connecting
1and resistance R
tcomposition; Described L
2r
lseries arm is by the inductance L of connecting
2and resistance R
lcomposition.
Further, described C mode filter is by inductance L
3, inductance L
4and electric capacity-resonance modules series arm composition; Described inductance L
3and inductance L
4all connect with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC; Described electric capacity-resonance modules series arm and the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC;
Described electric capacity-resonance modules series arm is made up of capacitor C6 and the resonance modules of connecting; Described resonance modules comprises damping resistance R ' and resonant circuit in parallel; Described resonant circuit is by the inductance L of connecting
5form with capacitor C7.
Compared with the prior art, the beneficial effect that the utility model reaches is:
1. the effectively high-frequency harmonic of filtering converter generation voltage of novel filter circuit effectively suppresses current changing rate simultaneously.
2. novel filter circuit effectively reduces the bucking voltage harmonic component of SSSC, UPQC series connection part, has improved SSSC, UPQC compensation precision, has improved the dynamic property of SSSC, UPQC.
3. novel filter circuit can also be used for other devices that needs series compensation, has stronger versatility.
4. improved LCL filter circuit (C mode filter) not only has good compensation effect, and C type passive filter is replaced to the passive link of common single tuning, utilize it in the time of fundamental frequency, to show high impedance, in the time of harmonic frequency, show as Low ESR and carry most of fundamental voltage, can reduce to greatest extent the design capacity of corresponding SSSC, UPQC series connection part, having reduced cost, is the good compensation arrangement of a kind of technical and economic performance of reducing investment outlay, and has very large development prospect.
Accompanying drawing explanation
Fig. 1 is that the SSSC that the utility model provides has the control system block diagram in filter situation
Fig. 2 is the LC connection in series-parallel filter circuit construction schematic diagram that the utility model provides;
Fig. 3 is the π type LC filter circuit construction schematic diagram that the utility model provides;
Fig. 4 is LCC (LCCR) the connection in series-parallel filter circuit construction schematic diagram that the utility model provides;
Fig. 5 is the LCL connection in series-parallel filter circuit construction schematic diagram that the utility model provides;
Fig. 6 is improved LCL filter circuit (C mode filter) structural representation that the utility model provides;
Fig. 7 is SSSC single-phase (containing the LCL filter) topological diagram that the utility model provides;
Fig. 8 is the UPQC basic topology figure that the utility model provides;
Fig. 9 is UPQC series connection part (LCL type filter circuit) structure chart that the utility model provides;
Figure 10 is SSSC output voltage wave (the single L filter circuit) figure that the utility model provides;
Figure 11 is SSSC output voltage wave (LC filter circuit) figure that the utility model provides;
Figure 12 is SSSC output voltage wave (the π type filter circuit) figure that the utility model provides;
Figure 13 is SSSC output voltage wave (LCC filter circuit) figure that the utility model provides;
Figure 14 is SSSC output voltage wave (LCL filter circuit) figure that the utility model provides;
Figure 15 is SSSC output voltage wave (the improved LCL filter circuit) figure that the utility model provides.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Because the output impedance control of SSSC, UPQC series connection part is the most basic control mode.This kind of control mode is generally open loop control, considers the error of pressure drop and the inverter output of coupling transformer, adds inverter to follow the tracks of after controlling unit, can effectively improve control precision.It is most important for device control performance and cost etc. whether outlet side contains Novel Filter, and it is larger that filter is mainly followed the tracks of controlling unit design impact to contravarianter voltage.Therefore,, before adding novel filter circuit, need first consider the control program containing novel filter circuit SSSC, UPQC series connection part.
Take SSSC as example, adding after Novel Filter, SSSC has the control system frame in filter situation, as shown in Figure 1, C in figure
ffor filter capacitor, L
ffor filter inductance, I
lfor inverter side output current.Adopt in filter situation V in control system for major loop
oembodiment in whole control system is comparatively direct, and its feedback quantity can not adopt low pass filter.In practical application, the leakage reactance of available coupling transformer substitutes filter inductance.The output impedance control that this control program contains novel filter circuit to UPQC series connection part is applicable equally.
The filter circuit that the utility model provides is connected with the series connection part of the inversion side of Static Series Synchronous Compensator SSSC or is connected with the series connection part of the inversion side of Unified Power Quality Controller UPQC; Described filter circuit comprises LC filter circuit, π type filter circuit, LCC or LCCR connection in series-parallel filter circuit, LCL connection in series-parallel filter circuit and C mode filter.
One, LC connection in series-parallel filter circuit:
The LC connection in series-parallel filter circuit construction schematic diagram that the utility model provides as shown in Figure 2, LC filter is applicable to the filtering of high-frequency signal, difference according to reactive components to AC and DC impedance, shown in the citation form accompanying drawing 2 of the filter circuit being made up of capacitor C and inductance L.LC filter circuit is made up of inductance L and capacitor C, described inductance L is connected with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC, described capacitor C and the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC.
Because induction reactance increases with frequency, and capacitive reactance reduces with frequency increase, and therefore, the series arm of LC low pass filter connects inductance, and knee-joint electric capacity.Capacitor C in parallel, in the time that input voltage raises, to capacitor charging, can be stored in portion of energy in capacitor.And in the time that input voltage reduces, electric capacity both end voltage is discharged with exponential law, just the energy of storage can be discharged.Circuit is to load discharge after filtering, and the output voltage obtaining in load is just smoother, has played flat ripple effect.If employing inductor filter, in the time that input voltage increases, the electric current in the inductance L of connecting with load increases, and therefore inductance L, by storage area magnetic field energy, in the time that electric current reduces, discharges energy again, makes load current become level and smooth.Compared with L filter, LC filter at load circuit capacitor C in parallel, increased high frequency content path, make output current wave more level and smooth.The SSSC output voltage wave (LC filter circuit) that the utility model provides is schemed as shown in figure 11.
Two, π type filter circuit: with π type LC filter circuit (accompanying drawing 3)
The π type LC filter circuit construction schematic diagram that the utility model provides as shown in Figure 3, described π type filter circuit is by inductance L ', capacitor C1 and capacitor C2 form, described inductance L ' connect with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC, described capacitor C1 and capacitor C2 all with the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC.
For π type LC filter circuit principle, the unidirectional pulsating nature direct voltage of inverter circuit output, first through capacitor C 1 filtering, removes most of high-frequency harmonic composition, and then is added in L ' and C2 filter circuit.For ripple composition, L ' is very large to its induction reactance, and the AC voltage drop on L ' is large like this, is added to alternating component in load little.For first-harmonic, because L ' does not present induction reactance, be equivalent to path, the wire diameter that π type LC filter circuit ripple inductance adopts is simultaneously thicker, and low frequency first-harmonic resistance is very little, like this fundamental voltage be there is no to voltage drop, so output voltage is higher.
Three, LCC (LCCR) filter circuit (accompanying drawing 4)
LCC (LCCR) the connection in series-parallel filter circuit construction schematic diagram that the utility model provides as shown in Figure 4, described LCC or LCCR connection in series-parallel filter circuit are by inductance L ' ', capacitor C3 and CR series arm form, described inductance L ' ' connect with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC, described capacitor C3 and CR series arm all with the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC; Described CR series arm is made up of the capacitor C4 connecting and damping resistance R;
The remaining high-frequency ripple that LCC or LCCR connection in series-parallel filter circuit more effectively stay after elimination LC filter circuit.Between the amortization period, can produce the higher-order of oscillation component that reaches a cycle time, can affect the effect of output voltage, therefore need to take restriction.
The wiring of Novel Filter is substantially the same with common LC filtering.The effect of damping resistance R is the serial resonant that may occur between inhibition filter inductance L ' ' and filter capacitor C4.Compare with conventional LC filtering, this mode of connection has kept the second-order filter characteristic of LC filter substantially, simultaneously also damping the series resonance between LC, therefore its performance is better than common LC filter.
Four, LCL filter circuit (accompanying drawing 5)
As shown in Figure 5, LCL connection in series-parallel filter circuit is by L for the LCL connection in series-parallel filter circuit construction schematic diagram that the utility model provides
1r
tseries arm, L
2r
lseries arm and capacitor C5 composition; Described L
1r
tseries arm and L
2r
lseries arm is all connected with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC; Described capacitor C5 and the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC; Described L
1r
tseries arm is by the inductance L of connecting
1and resistance R
tcomposition; Described L
2r
lseries arm is by the inductance L of connecting
2and resistance R
lcomposition; Its basic principle is L
2with C5 to L
1the HF switch ripple that electric current contains carries out impedance shunting, and capacitor C, for radio-frequency component provides low impedance path, has reduced the high fdrequency component of electric current (offset current of the generation of device) so effectively.LCL filter has than the better performance of single inductor filter, can take into account low-and high-frequency gain and front end decay.Compared with L filter, LCL filter has increased filter inductance L
2with filter capacitor C5, as third-order system, it can better must suppress undue fluctuation and the surge impact of electric current, the high-frequency current composition filtering that switch motion is produced, and have certain EMC effect.
Five, improved LCL filter circuit (accompanying drawing 6)
Improved LCL filter circuit (C mode filter) structural representation that the utility model provides as shown in Figure 6, because LCL filter exists resonance peak, needs passive damping to suppress resonance peak, thereby realizes system stability.Passive damping is exactly the stable control that serial or parallel connection resistance is realized system on LCL filter inductance or electric capacity.Because its method is simple and be easy to realization, thereby be widely applied.But in high-power SSSC and UPQC series connection part, particularly, when power reaches hundreds of kilowatt hour, damping resistance will bring very lossy, have a strong impact on system effectiveness.Therefore, need improve original LCL filter circuit.
As shown in Figure 6,
Filter circuit is by a LC resonant circuit, i.e. C mode filter in parallel at damping resistance two ends.C mode filter is by inductance L
3, inductance L
4and electric capacity-resonance modules series arm composition; Described inductance L
3and inductance L
4all connect with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC; Described electric capacity-resonance modules series arm and the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC; Described electric capacity-resonance modules series arm is made up of capacitor C6 and the resonance modules of connecting; Described resonance modules comprises damping resistance R ' and resonant circuit in parallel; Described resonant circuit is by the inductance L of connecting
5form with capacitor C7.
The principal character of C mode filter is near reactor L and capacitor C first-harmonic
1series resonance makes switching harmonics electric current all reach with the electric current that reduces to flow through damping resistance the object that reduces loss by resonance branch road, and condition of resonance is formula Z
1=r+j (X
l-X
c1) in imaginary part be zero.Under power frequency, resistor R is substantially by short circuit.The fundamental wave reactive power output Q of C mode filter
f1=U
2/ X
c2=w
1c
2u
2, in formula, U is bus virtual voltage.Because the existence of resonant circuit can be played good filter effect, still there is the risk of off resonance simultaneously.
In Fig. 6, the harmonic number corresponding to impedance minimum value of C mode filter depends on ratio C
1/ C, and the value of C is determined by the First Harmonic Reactive Power of the required compensation of system, at condition w
1 2lC
1under=1 restriction, C
1do not bear compensating action.So the selection of capacity takes into full account integrated technology economic index, should not be too large.The minimum impedance of C mode filter is decided by (C
1+ C) CR
2, after determining, cut-off frequency only depends on the value of CR, in reality, conventional R adjusts minimum impedance value, to meet compensation needs.
This kind of improved LCL filter circuit not only has good compensation effect, and C type passive filter is replaced to the passive link of common single tuning, utilize it in the time of fundamental frequency, to show high impedance, in the time of harmonic frequency, show as Low ESR and carry most of fundamental voltage, can reduce to greatest extent the design capacity of corresponding SSSC, UPQC series connection part, having reduced cost, is the good compensation arrangement of a kind of technical and economic performance of reducing investment outlay, and has very large development prospect.
Fig. 7 is the topological diagram in single-phase loop in SSSC device, includes follow-on LCL filter.Wherein the inversion side in single-phase loop is connected in series with the module of single H bridge, then the output of the LCL filter of Innovation of Connection type.
Fig. 8 is UPQC device basic topology figure, wherein installs inside and includes series compensator and shunt compensator.Fig. 9 is the topological diagram of the series compensator in UPQC device, and the unsteady flow of wherein connecting side is with three-phase half-bridge topology, then connects follow-on LCL filter output.Filter effect is consistent with the SSSC device filter effect of Fig. 7.
According to the topological loop of the SSSC device of Fig. 7, carry out verification experimental verification filter effect.
Figure 10 to Figure 15 is the design sketch of waveform, and observation draws the following conclusions: follow-on LCL filter, current capacity the best of filtering radio-frequency component.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although the utility model is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement embodiment of the present utility model, and do not depart from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (6)
1. for the filter circuit of SSSC and UPQC series connection part, described filter circuit is connected with the series connection part of the inversion side of Static Series Synchronous Compensator SSSC or is connected with the series connection part of the inversion side of Unified Power Quality Controller UPQC; It is characterized in that, described filter circuit comprises LC filter circuit, π type filter circuit, LCC or LCCR connection in series-parallel filter circuit, LCL connection in series-parallel filter circuit and C mode filter.
2. filter circuit as claimed in claim 1, it is characterized in that, described LC filter circuit is low-pass filter circuit, for the filtering of high-frequency signal, formed by inductance L and capacitor C, described inductance L is connected with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC, described capacitor C and the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC.
3. filter circuit as claimed in claim 1, it is characterized in that, described π type filter circuit is by inductance L ', capacitor C1 and capacitor C2 form, described inductance L ' connect with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC, described capacitor C1 and capacitor C2 all with the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC.
4. filter circuit as claimed in claim 1, it is characterized in that, described LCC or LCCR connection in series-parallel filter circuit are by inductance L ' ', capacitor C3 and CR series arm form, described inductance L ' ' connect with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC, described capacitor C3 and CR series arm all with the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC;
Described CR series arm is made up of the capacitor C4 connecting and damping resistance R.
5. filter circuit as claimed in claim 1, is characterized in that, described LCL connection in series-parallel filter circuit is by L
1r
tseries arm, L
2r
lseries arm and capacitor C5 composition; Described L
1r
tseries arm and L
2r
lseries arm is all connected with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC; Described capacitor C5 and the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC;
Described L
1r
tseries arm is by the inductance L of connecting
1and resistance R
tcomposition; Described L
2r
lseries arm is by the inductance L of connecting
2and resistance R
lcomposition.
6. filter circuit as claimed in claim 1, is characterized in that, described C mode filter is by inductance L
3, inductance L
4and electric capacity-resonance modules series arm composition; Described inductance L
3and inductance L
4all connect with the inversion side of Static Series Synchronous Compensator SSSC or with the inversion side of Unified Power Quality Controller UPQC; Described electric capacity-resonance modules series arm and the inversion side of Static Series Synchronous Compensator SSSC or in parallel with the inversion side of Unified Power Quality Controller UPQC;
Described electric capacity-resonance modules series arm is made up of capacitor C6 and the resonance modules of connecting; Described resonance modules comprises damping resistance R ' and resonant circuit in parallel; Described resonant circuit is by the inductance L of connecting
5form with capacitor C7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320823531.1U CN203608077U (en) | 2013-12-12 | 2013-12-12 | Filter circuit for serial-connection parts of SSSC (static synchronous series compensator) and UPQC (unified power quality controller) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320823531.1U CN203608077U (en) | 2013-12-12 | 2013-12-12 | Filter circuit for serial-connection parts of SSSC (static synchronous series compensator) and UPQC (unified power quality controller) |
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| Publication Number | Publication Date |
|---|---|
| CN203608077U true CN203608077U (en) | 2014-05-21 |
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ID=50720736
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320823531.1U Expired - Fee Related CN203608077U (en) | 2013-12-12 | 2013-12-12 | Filter circuit for serial-connection parts of SSSC (static synchronous series compensator) and UPQC (unified power quality controller) |
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| CN (1) | CN203608077U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516995A (en) * | 2016-06-15 | 2017-12-26 | 泰达国际控股有限公司 | Suitable for the ripple compensation circuit of power supply unit and its compensation method |
| CN110365025A (en) * | 2019-08-05 | 2019-10-22 | 湖南大学 | A kind of series capacitance coupled mode dynamic electric voltage recovery device and its control method |
-
2013
- 2013-12-12 CN CN201320823531.1U patent/CN203608077U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516995A (en) * | 2016-06-15 | 2017-12-26 | 泰达国际控股有限公司 | Suitable for the ripple compensation circuit of power supply unit and its compensation method |
| CN110365025A (en) * | 2019-08-05 | 2019-10-22 | 湖南大学 | A kind of series capacitance coupled mode dynamic electric voltage recovery device and its control method |
| CN110365025B (en) * | 2019-08-05 | 2022-11-11 | 湖南大学 | Series capacitance coupling type dynamic voltage restorer and control method thereof |
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