CN201178308Y - Voltage disturbing compensating apparatus - Google Patents
Voltage disturbing compensating apparatus Download PDFInfo
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- CN201178308Y CN201178308Y CNU2008200801813U CN200820080181U CN201178308Y CN 201178308 Y CN201178308 Y CN 201178308Y CN U2008200801813 U CNU2008200801813 U CN U2008200801813U CN 200820080181 U CN200820080181 U CN 200820080181U CN 201178308 Y CN201178308 Y CN 201178308Y
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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
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- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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Abstract
The utility model relates to a voltage disturbance compensation device, and belongs to the technical field of electric power quality analysis and control. The voltage disturbance compensation device comprises a parallel-connection converter transformer (1), a three-phase full-bridge PWM convertor (2), a direct current chopper and super-capacitance energy storage system (3), a single-phase full-bridge PWM convertor (4) and a series-connection injection transformer (5). The voltage disturbance compensation device has the advantages that the multiple functions aiming at the operation device in the 380V three-phase four-wire system, such as dynamic voltage recovery, active filtering, short-circuit current limitation and electric energy conservation, can be flexibly realized. For the possible long-time under-voltage or overvoltage, the provided voltage disturbance compensation device ensures the loaded operation within the allowable voltage range to not only prevent the power load from being damaged, but also limit the overvoltage in a rated voltage, thereby greatly reducing electric powder consumption of the load to save the electric power. When the short-circuit failure occurs on the loaded side, the provided voltage disturbance compensation device can effectively limit the short-circuit value, and protect the safe operation of the circuit and other power supply devices.
Description
Technical field
The utility model belongs to power quality analysis and control technology field, and a kind of voltage disturbance compensation arrangement particularly is provided.
Background technology
Along with improving constantly of science and technology development and the production automation, digitlization, integrated degree, a large amount of sensitive loads relevant with the continuity production process are more and more higher to the requirement of the quality of power supply.The quality of voltage problem that did not in the past cause a significant threat has directly or indirectly influenced the production and the economic benefit of these sensitive users.The present invention's (multifunctional electric quality adjustor in the low-pressure system) can solve the supply power voltage quality problems effectively, it has the inhibition voltage harmonic, bucking voltage is fallen temporarily and the temporary multiple function that rises, suppresses voltage fluctuation, limits load short circuit current and saves energy, can greatly improve power supply reliability and economy to sensitive load.At present domestic still do not have desirable solution to quality of voltage problems such as voltage dip, short circuit current restriction etc., and the utility model will provide comprehensive technology and solution for sensitive loads such as new and high-tech development zone, accurate flow production line solve power quality problem.
Summary of the invention
The purpose of this utility model is to provide a kind of low-pressure system (rated line voltage is the three-phase four-wire system of 380V) multifunctional electric disturbance compensation mechanism, be based on the power electronic equipment of igbt (IGBT) device and pulse-width modulation (PWM) control technology, it can solve the overwhelming majority sensitive load is produced dysgenic supply power voltage quality problems, as voltage dip, temporary liter, voltage harmonic, voltage fluctuation and long-time overvoltage, under voltage etc.It adopts novel energy-storing element-super capacitor as energy storage device, at different sensitive equipments, realize that dynamic electric voltage recovers (Dynamic Voltage Restorer, DVR), active power filtering (Active PowerFilter, APF), short circuit current restriction (Fault Current Limit, FCL) and multi objective control such as energy-conservation, improve the supply power voltage quality of sensitive load significantly.
The voltage disturbance compensation arrangement that the utility model proposes (is designated hereinafter simply as UVQC, Unified VoltageQuality Conditioner), form by converter transformer 1 in parallel, three phase full bridge PWM current transformer 2, DC chopper and super capacitor energy-storage system 3, single-phase full bridge PWM current transformer group 4, series connection injection transformer group 5, as shown in Figure 1.At the operational outfit in the 380V three-phase four-wire system, realize dynamic electric voltage recovery, active power filtering, short circuit current restriction and energy-conservation controlled function.
Converter transformer in parallel as shown in Figure 2 is the three-phase two winding transformer, realize adjuster and the isolation of electrical network and the two-way conveying of energy, former secondary is respectively star and delta connection, and the connection group is Y/D-11, former secondary rated line voltage is 400V, rated frequency 50Hz.The former limit of transformer three phase terminals are parallel-connected on the three-phase power line, and secondary three phase terminals are connected to three phase full bridge PWM current transformer part.
Three phase full bridge PWM current transformer as shown in Figure 3.The three-phase line of being drawn by converter transformer in parallel is incorporated into three brachium pontis terminals of three phase full bridge PWM current transformer by three inductance that are connected.Each brachium pontis is by up and down two IGBT and inverse parallel diode thereof are in series.End points is connected respectively to together about three brachium pontis, forms the dc bus of current transformer, and the upper end bus is anodal, and the lower end bus is a negative pole.When three phase full bridge PWM current transformer works in high-frequency rectification state following time, energy flows to the load of DC side from grid side; And it works under the reproduced state, is equivalent to the three-phase PWM voltage source inverter, and the energy of DC side is fed back to the AC side electrical network.Positive and negative two dc buss are connected to DC chopper and super capacitor energy-storage system.
DC chopped-wave and super capacitor energy-storage system are connected between the dc bus of three phase full bridge PWM current transformer output as shown in Figure 4.Electric capacity shown in the figure is the super capacitor energy-storage system, by 200 monomer series-connected forming of super capacitor, is connected to the protection of two diodes realizations of super capacitor to super capacitor.Diode anode, a negative electrode are connected to super capacitor negative pole, positive pole respectively; The anode of another diode, negative electrode are connected to the positive pole of super capacitor, the anodal dc bus of three phase full bridge PWM current transformer output respectively.The switching device of DC chopped-wave is two IGBT, and high-order IGBT realizes the buck chopper control of super capacitor charging, and low level IGBT realizes the boost chopper control of super capacitor discharge, two diodes respectively with the IGBT reverse parallel connection.The inductance that is connected on the super capacitor positive pole is the shared inductance of boost chopper and buck chopper, and the opposite side lead-in wire of inductance is connected to the terminal of DC chopped-wave brachium pontis.
Single-phase series injection transformer group is made of three single-phase injection transformers, as shown in Figure 6.Every transformer is single-phase double-winding structure, former secondary rated voltage 400V, operating frequency 50～1000Hz.
The operation principle of UVQC is summarized as follows.
When harmonic current formed the harmonic wave pressure drop on line impedance, the three phase full bridge PWM current transformer of UVQC worked in the high-frequency rectification state, absorbed the various meritorious consumption of energy compensating by grid side, and it is constant to keep DC bus-bar voltage; The single-phase full bridge PWM current transformer of UVQC works in inverter state, injects and the harmonic voltage that the system harmonics voltage swing equates, direction is opposite, keeps the voltage waveform of load side sine, realizes tandem type APF (active filter) function.
When system side causes voltage dip owing to reasons such as operation, fault, big load inputs, three single-phase full bridge PWM current transformers inject corresponding bucking voltage according to control command, make the voltage of load side keep fault that preceding normal condition takes place, realize the function of DVR (dynamic electric voltage recovery device).
When if long-time overvoltage, under voltage take place in system, UVQC requires to be injected and system voltage homophase or anti-phase instantaneous voltage by three single-phase full bridge PWM current transformers according to control, make load side voltage remain the rated operational voltage of setting, guarantee load operation in optimum condition, realize target energy-conservation and that prolong the power consumption equipment life-span.When overvoltage took place, the compensation response of UVQC can cause DC bus-bar voltage to raise.If overvoltage or surge carry out quick charge by DC chopper circuit to the super capacitor energy-storage system in short-term, absorb less dc voltage pump and rise energy.If the extended overvoltage situation occurs, then the three phase full bridge current transformer of UVQC works in inverter mode, the DC bus-bar voltage pump is risen energy feed back in the electrical network and go, and greatly reduces power consumption, has saved the energy.
When under voltage took place, the three phase full bridge current transformer of UVQC worked in the rectifier state, absorbed energy to keep nominal load side voltage and be near the scope that allows the rated value from system.
When load side was short-circuited fault, the instantaneous injection three-phase of UVQC and system each phase voltage equal and opposite in direction, the instantaneous voltage value that direction is opposite because of load side voltage is limited to minimum numerical value, thereby had limited the size of short circuit current.Consider the requirement of relaying protection action, can adjust, make that fault current numerical value satisfied relaying protection action limit value when short circuit took place the injecting voltage of UVQC.The system capacity that absorbs during the limiting short-circuit current is by the three phase full bridge current transformer feedback grid of UVQC, and protection circuit and power consumption equipment are avoided damage.
Advantage of the present utility model is: at the operational outfit in the 380V three-phase four-wire system, can realize the multinomial function of dynamic electric voltage recovery, active power filtering, short circuit current restriction and saves energy flexibly.For the long-time under voltage or the overvoltage problem that may occur, the voltage disturbance compensation arrangement that the utility model provides has guaranteed that load operation is in the voltage range that allows, the danger of not only protecting power load to avoid damaging, and since with overvoltage Limiting in rated voltage, the electric energy that makes load consume greatly reduces, and has realized the function of saves energy; When load side is short-circuited fault, the voltage disturbance compensation arrangement that the utility model provides effectively limiting short-circuit current numerical value with the safe operation of protection circuit and other power consumption equipments.
Description of drawings
Fig. 1 is the circuit structure diagram of voltage disturbance compensation arrangement of the present utility model (UVQC).Wherein, converter transformer 1 in parallel, three phase full bridge PWM current transformer 2, DC chopper and super capacitor energy-storage system 3, single-phase full bridge PWM current transformer group 4, series connection injection transformer group 5.
Fig. 2 is a converter transformer schematic diagram in parallel of the present utility model.
Fig. 3 is a three phase full bridge PWM current transformer schematic diagram of the present utility model.
Fig. 4 is DC chopper of the present utility model and super capacitor energy-storage system schematic.
Fig. 5 is a single-phase full bridge PWM current transformer group schematic diagram of the present utility model.
Fig. 6 is a single-phase series injection transformer group schematic diagram of the present utility model.
Embodiment
Voltage disturbance compensation arrangement (UVQC), by converter transformer in parallel, three phase full bridge PWM current transformer, DC chopper and super capacitor energy-storage system, single-phase full bridge PWM current transformer group, series connection injection transformer group totally 5 parts form, as shown in Figure 1.Wherein label is that 1 part is a converter transformer in parallel, referring to accompanying drawing 2; Label is that 2 part is a three phase full bridge PWM current transformer, referring to accompanying drawing 3; Label is that 3 part is DC chopper and super capacitor energy-storage system, referring to accompanying drawing 4; Label is that 4 part is a single-phase full bridge PWM current transformer group, referring to accompanying drawing 5; Label is that 5 part is a single-phase series injection transformer group, referring to accompanying drawing 6, is respectively described below.
Converter transformer in parallel as shown in Figure 2 is the three-phase two winding transformer, and former secondary is respectively star and delta connection, and the connection group is Y/D-11, and former secondary rated line voltage is 400V, rated frequency 50Hz.The former limit of transformer three phase terminals are parallel-connected on the three-phase power line, and secondary three phase terminals are connected to three phase full bridge PWM current transformer part.
Three phase full bridge PWM current transformer as shown in Figure 3.The three-phase line of being drawn by converter transformer in parallel is incorporated into three brachium pontis terminals of three phase full bridge PWM current transformer by three inductance that are connected.Each brachium pontis is by up and down two IGBT and inverse parallel diode thereof are in series.End points is connected respectively to together about three brachium pontis, forms the dc bus of current transformer, and the upper end bus is anodal, and the lower end bus is a negative pole.When three phase full bridge PWM current transformer works in high-frequency rectification state following time, energy flows to the load of DC side from grid side; And it works under the reproduced state, is equivalent to the three-phase PWM voltage source inverter, and the energy of DC side is fed back to the AC side electrical network.Positive and negative two dc buss are connected to DC chopper and super capacitor energy-storage system.
DC chopped-wave and super capacitor energy-storage system are connected between the dc bus of three phase full bridge PWM current transformer output as shown in Figure 4.Electric capacity shown in the figure is the super capacitor energy-storage system, by up to a hundred monomer series-connected the forming of super capacitor, is connected to the protection of two diodes realizations of super capacitor to super capacitor.Diode anode, a negative electrode are connected to super capacitor negative pole, positive pole respectively; The anode of another diode, negative electrode are connected to the positive pole of super capacitor, the anodal dc bus of three phase full bridge PWM current transformer output respectively.The switching device of DC chopped-wave is two IGBT, and high-order IGBT realizes the buck chopper control of super capacitor charging, and low level IGBT realizes the boost chopper control of super capacitor discharge, two diodes respectively with the IGBT reverse parallel connection.The inductance that is connected on the super capacitor positive pole is the shared inductance of boost chopper and buck chopper, and the opposite side lead-in wire of inductance is connected to the terminal of DC chopped-wave brachium pontis.
Single-phase series injection transformer group is made of three single-phase injection transformers, as shown in Figure 6.Every transformer is single-phase double-winding structure, former secondary rated voltage 400V, operating frequency 50～1000Hz.
Claims (6)
1, a kind of voltage disturbance compensation arrangement is characterized in that: be made up of converter transformer in parallel (1), three phase full bridge PWM current transformer (2), DC chopper and super capacitor energy-storage system (3), single-phase full bridge PWM current transformer group (4), series connection injection transformer group (5).
2, according to the described voltage disturbance compensation arrangement of claim 1, it is characterized in that: described converter transformer in parallel is a three-phase double winding converter transformer, former limit, secondary are respectively star and delta connection, the connection group is Y/D-11, former limit, secondary rated line voltage are 400V, rated frequency 50Hz.
3, according to the described voltage disturbance compensation arrangement of claim 1, it is characterized in that: described three phase full bridge PWM current transformer has three brachium pontis, each brachium pontis is by up and down two IGBT and inverse parallel diode thereof are in series, end points is connected respectively to together about three brachium pontis, form the dc bus of current transformer, the upper end bus is anodal, and the lower end bus is a negative pole.
4, according to the described voltage disturbance compensation arrangement of claim 1, it is characterized in that: the energy-storage system in described DC chopped-wave and the super capacitor energy-storage system, by 200 monomer series-connected forming of super capacitor; Diode anode, a negative electrode are connected to negative pole, the positive pole of super capacitor system respectively; The anode of another diode, negative electrode are connected to the positive pole of super capacitor and the anodal dc bus of three phase full bridge PWM current transformer output respectively; The switching device of DC chopped-wave is two IGBT, two diodes respectively with the IGBT reverse parallel connection; The inductance that is connected on the super capacitor positive pole is the shared inductance of boost chopper and buck chopper, and the opposite side lead-in wire of inductance is connected to the terminal of DC chopped-wave brachium pontis.
5, according to the described voltage disturbance compensation arrangement of claim 1, it is characterized in that: described single-phase full bridge PWM current transformer group comprises three single-phase full bridge PWM current transformers, corresponding dc capacitor and filter circuit, the DC side of three single-phase full bridge PWM current transformers is shared dc bus, be connected with direct current capacitor between the dc bus of every single-phase full bridge PWM current transformer, single-phase full bridge PWM current transformer is respectively by two brachium pontis, four IGBT constitute, every IGBT reverse parallel connection fly-wheel diode, two brachium pontis terminals of single-phase full bridge PWM current transformer are connected to the LC low pass filter, link to each other with three-phase series filtering inductance.
6, according to the described voltage disturbance compensation arrangement of claim 1, it is characterized in that: described single-phase series injection transformer group is made of three single-phase injection transformers, every transformer is single-phase double-winding structure, former limit, secondary rated voltage 400V, operating frequency 50～1000Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200801813U CN201178308Y (en) | 2008-04-25 | 2008-04-25 | Voltage disturbing compensating apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200801813U CN201178308Y (en) | 2008-04-25 | 2008-04-25 | Voltage disturbing compensating apparatus |
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| CN201178308Y true CN201178308Y (en) | 2009-01-07 |
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| CNU2008200801813U Expired - Fee Related CN201178308Y (en) | 2008-04-25 | 2008-04-25 | Voltage disturbing compensating apparatus |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807799A (en) * | 2010-04-27 | 2010-08-18 | 天津大学 | Super capacitor energy storage type power quality compensator |
| CN103078316A (en) * | 2013-01-06 | 2013-05-01 | 湖北省电力公司电力科学研究院 | Network voltage disturbance generating device and control method thereof |
| CN103326398A (en) * | 2013-06-09 | 2013-09-25 | 阳光电源（上海）有限公司 | Voltage compensation device, current converter comprising same and photovoltaic power generation system comprising same |
| CN106740152A (en) * | 2016-11-06 | 2017-05-31 | 华北电力大学 | A kind of electric automobile uses the vehicle-mounted integrated form charge-discharge circuit of shunting tap |
| CN107783010A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of more level active compensation devices of front-end power and control method |
| CN110266018A (en) * | 2019-06-04 | 2019-09-20 | 中国科学院电工研究所 | Unified Power Quality Controller and its control method and control system |
| CN111952984A (en) * | 2020-08-24 | 2020-11-17 | 西安许继电力电子技术有限公司 | Non-access type alternating voltage compensation circuit and system |
-
2008
- 2008-04-25 CN CNU2008200801813U patent/CN201178308Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807799A (en) * | 2010-04-27 | 2010-08-18 | 天津大学 | Super capacitor energy storage type power quality compensator |
| CN101807799B (en) * | 2010-04-27 | 2012-05-02 | 天津大学 | Super capacitor energy storage type power quality compensator |
| CN103078316A (en) * | 2013-01-06 | 2013-05-01 | 湖北省电力公司电力科学研究院 | Network voltage disturbance generating device and control method thereof |
| CN103078316B (en) * | 2013-01-06 | 2015-02-04 | 湖北省电力公司电力科学研究院 | Network voltage disturbance generating device and control method thereof |
| CN103326398A (en) * | 2013-06-09 | 2013-09-25 | 阳光电源（上海）有限公司 | Voltage compensation device, current converter comprising same and photovoltaic power generation system comprising same |
| CN107783010A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of more level active compensation devices of front-end power and control method |
| CN106740152A (en) * | 2016-11-06 | 2017-05-31 | 华北电力大学 | A kind of electric automobile uses the vehicle-mounted integrated form charge-discharge circuit of shunting tap |
| CN110266018A (en) * | 2019-06-04 | 2019-09-20 | 中国科学院电工研究所 | Unified Power Quality Controller and its control method and control system |
| CN111952984A (en) * | 2020-08-24 | 2020-11-17 | 西安许继电力电子技术有限公司 | Non-access type alternating voltage compensation circuit and system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090107 Termination date: 20110425 |