CN202550534U - Comprehensive overcurrent protection power quality control device - Google Patents
Comprehensive overcurrent protection power quality control device Download PDFInfo
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- CN202550534U CN202550534U CN2012201344258U CN201220134425U CN202550534U CN 202550534 U CN202550534 U CN 202550534U CN 2012201344258 U CN2012201344258 U CN 2012201344258U CN 201220134425 U CN201220134425 U CN 201220134425U CN 202550534 U CN202550534 U CN 202550534U
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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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- 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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The utility model discloses a comprehensive overcurrent protection power quality control device, and relates to a circuit device used for an alternating-current main line or an alternating-current distribution network, in particular to a device applicable to stabilizing voltage and reducing harmonic waves or ripples. The comprehensive overcurrent protection power quality control device comprises a voltage and current regulating module and a detection control module, and is connected between a power source and a sensitive load of a three-phase system; the voltage and current regulating module is a multi-level cascading IGBT (insulated gate bipolar transistor) power module, and each phase of the voltage and current regulating module comprises n voltage compensation units which are connected in series; and the detection control module is provided with a comprehensive overcurrent protection circuit, a current limiting protection unit of the comprehensive overcurrent protection circuit is provided with two input ends, one of the input ends is connected to a Uce detecting unit, and the other input end is connected to an overcurrent detection unit in an isolated manner by an optocoupler or an optical fiber. The comprehensive overcurrent protection power quality control device has the advantages that the quality of power provided for sensitive consumers can be remarkably improved, faults of a power grid and electric equipment for sensitive load are reduced, loss of the power gird is reduced, power utilization rate is increased, and reliability of a short-circuit protection circuit is improved.
Description
Technical field
The utility model relates to a kind of circuit arrangement that is used for ac mains or ac distribution network, relates in particular to a kind of high-voltage alternating electrical network burning voltage and device that reduces harmonic wave or ripple of being applicable to.
Background technology
Modern industry, commerce and residential electricity consumption equipment in the urban distribution network; Like high-performance office equipment, accurate laboratory apparatus, frequency control equipment, programmable logic controller (PLC), various automatic assembly line and computer system etc. power supply characteristic is changed the sensitiveness load and be ascendant trend year by year, the requirement of the quality of power supply is improved constantly.As far as sensitive users (like semiconductor manufacturing enterprise), the voltage dip of a few tens of milliseconds just possibly cause device damage, production line to stop production, and causes the tremendous economic loss.Meanwhile, the factors such as a large amount of accesses of distributed energy, impact and interference load all make the electrical network quality of power supply have trend, the safe operation of serious threat electric power system and the operate as normal of power consumption equipment that worsens day by day.
To sensitive load quality of power supply control problem, carried out the research manufacturing of quality of power supply control product both at home and abroad.But; Quality of power supply control device does not also form standardized product; And mainly rest on low pressure low capacity scope, Chinese utility model patent " low harmonic wave power quality control system " (utility model patent number: ZL201020133972 publication number: CN201656479) disclose a kind of low harmonic wave power quality control system.Should low harmonic wave power quality control system comprise checkout gear, electric power adjusting device, resistive load device.Checkout gear receives the feedback signal that comes from the resistive load device.The control signal of checkout gear output can use voltage or electric current to be signal.After the electric power adjusting device receives said control signal, with ratio mode outputting drive voltage.Said ratio mode is for exporting the total power driving voltage at continuous output time at interval, and continuously not output time stop to export the total power driving voltage at interval.After the resistive load device received driving voltage, output feedback signal was to checkout gear.Export the total power driving voltage with the ratio mode at interval at continuous output time, and continuously not output time stop to export the total power driving voltage at interval, can effectively reduce the harmonic wave that produces electric power.But this device is only applicable to low power resistive load device, is not suitable for the electrical network quality of power supply control of high-power; Its objective is of the influence of the harmonic wave of minimizing resistive load device generation to power quality, rather than through improving the quality of power supply of power supply grid, for sensitive loads provides higher-quality power supply.
The utility model content
The purpose of the utility model is that a kind of comprehensive overcurrent protection quality of power supply control device will be provided; Solution improves the sensitive users power supply quality of power supply, the technical problem of the fault of minimizing electrical network and sensitive loads power consumption equipment, reduction grid loss, raising utilization rate of electrical.
The utility model solves the problems of the technologies described above the technical scheme that is adopted:
A kind of comprehensive overcurrent protection quality of power supply control device; Comprise the electric current and voltage adjustment module and detect control module; Described comprehensive overcurrent protection quality of power supply control device is connected between three-phase system power supply and the sensitive loads, and the detection input of described detection control module is connected to the three-phase system power supply, the control output end of described detection control module; Be connected to the electric current and voltage adjustment module, it is characterized in that:
Described electric current and voltage adjustment module is a multipleization cascade IGBT power model, and every voltage compensation unit that is connected in series by n is formed, wherein 1≤n≤20;
Described detection control module is provided with comprehensive current foldback circuit, and described comprehensive current foldback circuit comprises current-limiting protection unit, Uce detecting unit, excessive current detection unit, current sensor;
The output of described current-limiting protection unit is connected in parallel with the output of IGBT drive circuit, and is connected to the grid of protected IGBT power model;
Described current sensor is connected in the electric current output loop of IGBT power model, and the detection output of current sensor is connected to described excessive current detection unit;
The input of described Uce detecting unit is connected to the collector electrode of IGBT power model;
Described current-limiting protection unit is provided with two inputs, and an input is connected to the Uce detecting unit, and another input is connected to said excessive current detection unit through optocoupler or optical fiber isolation.
A kind of optimized technical scheme of the comprehensive overcurrent protection quality of power supply control device of the utility model; The main circuit that it is characterized in that described voltage compensation unit is the H bridge power unit circuit that IGBT connects to form; Each voltage compensation unit is connected to the three-phase system power supply through a multi-winding isolation transformer; The input of each road H bridge power unit circuit is connected to a secondary winding of isolating transformer.
A kind of preferable technical scheme of the comprehensive overcurrent protection quality of power supply control device of the utility model; It is characterized in that described electric current and voltage adjustment module comprises the harmonic current compensation unit, the main circuit of described harmonic current compensation unit is the H bridge power unit circuit that IGBT connects to form; Each of described isolating transformer also is included as the secondary winding of harmonic current compensation unit power supply mutually; The harmonic current compensation unit of each phase is connected to the three-phase system power supply through the secondary winding of isolating transformer respectively, and the input of the H bridge power unit circuit of harmonic current compensation unit is connected to a secondary winding of isolating transformer through rectification circuit; Being connected the same harmonic current compensation unit of going up mutually of three-phase system power supply is connected with the voltage compensation units in series.
A kind of better technical scheme of the comprehensive overcurrent protection quality of power supply control device of the utility model is characterized in that described detection control module comprises digital signal processor, signal condition element and current/voltage-converted element; Described digital signal processor is provided with AD converter and PWM output port, and the input end of analog signal of said AD converter is connected to three-phase system power source voltage instrument transformer summation current transformer through signal condition element and current/voltage-converted element; Said PWM output port is connected respectively to the grid of the IGBT of each harmonic current compensation unit, voltage compensation unit, road through the IGBT drive circuit.
A kind of further improved technical scheme of the comprehensive overcurrent protection quality of power supply control device of the utility model; It is characterized in that described detection control module also comprises NIU, described digital signal processor is connected to the grid monitoring system of three-phase system power supply through NIU.
The beneficial effect of the utility model is:
1. the comprehensive overcurrent protection quality of power supply control device of the utility model can significantly improve the sensitive users power supply quality of power supply, reduces fault, reduction grid loss, the raising utilization rate of electrical of electrical network and sensitive loads power consumption equipment.Utilize Uce detecting unit and current sensor senses, protected IGBT power model is realized integrated protection, improved the reliability of short-circuit protection circuit greatly.
2. adopt multipleization cascade IGBT power model; Series connection through power cell; Reduced the requirement of withstand voltage of power device, can adopt technology maturation, cheap low pressure IGBT to form inversion unit, through the number adaptation different output voltage requirement of series unit.
3. because inverter adopts multipleization PWM technology, can obtain desirable phase voltage waveform, can be rated as perfect harmony through stack.Input power factor can reach more than 0.95, and input filter and power factor compensation device needn't be set, and has further reduced system cost.The improvement of waveform can also reduce noise and dv/dt value except that reducing output harmonic wave.
4. because each power cell of electric current and voltage adjustment module has identical structure and parameter; Be convenient to power cell is made modularization; Realize Redundancy Design, even also can be when the individual elements fault through the unit bypass function with this unit short circuit, system still can be normally or derate move.
Description of drawings
Fig. 1 is the main circuit diagram of the comprehensive overcurrent protection quality of power supply control device of the utility model;
Fig. 2 is the operation principle block diagram of multipleization cascade IGBT power model;
Fig. 3 is the H bridge element circuit figure of the comprehensive overcurrent protection quality of power supply control device of the utility model;
Fig. 4 is the control unit circuit figure of the comprehensive overcurrent protection quality of power supply control device of the utility model;
Fig. 5 is the theory diagram of comprehensive current foldback circuit.
The label of each parts in more than scheming: 100-three phase mains, multipleization of 200-cascade IGBT power model, 201～20n H bridge power model, 210-harmonic current compensation unit; The 300-digital signal processor, 310-AD transducer, 320-PWM output port, 400-signal condition element; 410-current/voltage-converted element, 500-NIU, 600-current-limiting protection unit, 610-Uce detecting unit; The 620-excessive current detection unit, 621-external reference voltage input, 630-current sensor; 640-is soft to switch off control circuit, 700-IGBT drive circuit, 900-sensitive loads.
Embodiment
In order to understand the technique scheme of the utility model better, be explained in further detail below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the main circuit diagram of the comprehensive overcurrent protection quality of power supply control device of the utility model; Comprise electric current and voltage adjustment module 200 and detect the control module (not shown); Described comprehensive overcurrent protection quality of power supply control device is connected between three-phase system power supply 100 and the sensitive loads 900; The detection input of described detection control module is connected to three-phase system power supply 100, and the control output end of described detection control module is connected to electric current and voltage adjustment module 200.Electric current and voltage adjustment module 200 is a multipleization cascade IGBT power model, and every voltage compensation unit 201-20n that is connected in series by n forms wherein 1≤n≤20 (referring to Fig. 3).So-called multipleization cascade; Be exactly whenever to form by several low pressure pwm power units in series; Each power cell is by the isolating transformer power supply of winding more than, with the opening and closing of each power cell of high speed digital signal processor control, with optocoupler or optical fiber isolation drive.
Described detection control module is provided with comprehensive current foldback circuit, and comprehensive current foldback circuit is as shown in Figure 5, comprises current-limiting protection unit 600, Uce detecting unit 610, excessive current detection unit 620, current sensor 630; The output of current-limiting protection unit 600 is connected in parallel with the output of IGBT drive circuit 700, and is connected to the grid of protected IGBT power model 200; Current sensor 630 is connected in the electric current output loop of IGBT power model 200, and the detection output of current sensor 630 is connected to excessive current detection unit 620; The input of Uce detecting unit 610 is connected to the collector electrode of IGBT power model 200; Current-limiting protection unit 600 is provided with two inputs, and an input is connected to Uce detecting unit 610, and another input is isolated the output that is connected to current detecting unit 620 through optocoupler or optical fiber.
Fig. 3 is the H bridge element circuit figure of the comprehensive overcurrent protection quality of power supply control device of the utility model, has only represented the phase in multipleization of the three-phase cascade IGBT power model among Fig. 3, and the circuit structure of other two phases is identical.Among the figure; The main circuit of voltage compensation unit 201～20n is the H bridge power unit circuit that insulated gate bipolar transistor (IGBT) connects to form; Each power cell 201～20n is made up of IGBT (T1 to T4), forms the PWM voltage source inverter of three-phase input, single-phase output.The output voltage of each power cell 201～20n is 1,0 ,-1 three kind of state level, and every phase n unit stack just can produce the different levels of 2n+1 kind.Each voltage compensation unit is connected to the three-phase system power supply through a multi-winding isolation transformer T10, and the input of each road H bridge power unit circuit is connected to the secondary winding of isolating transformer T10 through rectification circuit; Isolating transformer T10 is a three-phase power transformer, and total 3n secondary winding is divided into the n group, and the difference through isolating transformer between every group connects group, realizes the phase difference (referring to Fig. 2) of 180/3n.Be example with 5 unit cascaded patterns among Fig. 2, connecing method with middle Δ is reference (phase difference is 0), upper and lower respectively have two covers leading respectively (+180/3n ,+360/3n) with hysteresis (180/3n ,-360/3n) 4 groups of windings.Difference through transformer connects group, can realize required difference angle.If the every group of power unit cascade that is 690V by 5 rated voltages, phase voltage is 690V * 5=3450V, and pairing line voltage is 6000V, thereby has realized realizing the function that high tension voltage compensates with the low pressure and low power element.Adopt power unit cascade, rather than connect with traditional device and to realize that high pressure exports, so the problem that does not exist device all to press.The output current that each power cell bears all equals the load phase current, that is, and and I1=I2=...=In; The voltage U i that each power cell bears (i=1-n) is the 1/n of output phase voltage U; Each power cell bears the power output of 1/3n.
The electric current and voltage adjustment module of the comprehensive overcurrent protection quality of power supply control device of the utility model comprises harmonic current compensation unit 210, has only represented the main circuit of the harmonic current compensation unit 210 of A phase among Fig. 1.This main circuit is identical with the voltage compensation unit, also is the H bridge power unit circuit that IGBT connects to form.Each of isolating transformer T10 also is included as the secondary winding of harmonic current compensation unit power supply mutually; 3 harmonic current compensation unit are connected to the three-phase system power supply through the secondary winding of isolating transformer T10 respectively, and the input of each road H bridge power unit circuit is connected to a secondary winding of isolating transformer; After being connected the same harmonic current compensation unit of going up mutually of three-phase system power supply and the voltage compensation units in series being connected, through the LC filter circuit that inductance L and capacitor Cx form, series connection inserts between three-phase system power supply 100 and the sensitive loads 900.Filter inductance L has metering function when load-side is short-circuited.
The detection control module of the comprehensive overcurrent protection quality of power supply control device of the utility model is as shown in Figure 4; Comprise digital signal processor 300, signal condition element 400, current/voltage-converted element 410 and NIU 500; Digital signal processor 300 is provided with AD converter 310 and PWM output port 320; The input end of analog signal of AD converter 310; Be connected to three-phase system power source voltage instrument transformer summation current transformer through signal condition element 400 and current/voltage-converted element 410, receive supply voltage and current detection signal; PWM output port 320 is through IGBT drive circuit 700; Be connected respectively to the grid of the IGBT (T1 to T4) of each harmonic current compensation unit, voltage compensation unit, road, send the pwm control signal of digital signal processor 300 generations to each power cell of multipleization cascade; Digital signal processor 300 is connected to the grid monitoring system of three-phase system power supply through NIU 500, realizes remote monitoring and networking control.
In an embodiment of the utility model; Digital signal processor 300 is the TMS320F28335 type digital signal processor of TI company, and this processor has the high speed processing ability of 150MHz, possesses 32 floating point processing units; 6 DMA passages are supported ADC, McBSP and EMIF; Nearly 18 tunnel PWM output is arranged, wherein have 6 the tunnel to be the distinctive more high-precision PWM output of TI (HRPWM), 12 16 passage ADC.IGBT drive circuit 700 can use any existing IGBT drive integrated circult, and typical embodiment is the EXB840 of EXB8 series, EXB841, EXB850; EXB851, the M57957 of M579 series, M57958; M57962, the HL402 of HL series, the GH-039 of GH series etc.In this embodiment; NIU 500 adopts EtherCAT from station control ET1100; EtherCAT is a real-time and opening Ethernet communications protocol; Can satisfy the continuous expansion of electric power system scale, system operation mode becomes increasingly complex, to the increasingly high requirement that requires of automatization level.
28335 produce 8 road PWM ripples, see off through IGBT drive circuit 700.On the integrated circuit board with all input fault signal phases " or " give 6 the tunnel and block PWM input signals (TZ), 28335 can directly block all PWM in case guarantee to break down from hardware.
The channel attached signal condition element 400 of analog acquisition comprises with current/voltage-converted element 410: two-way voltage Hall element (CHV-50P/1200A) input; The input of 2 road current Hall elements; 4 road thermistors sampling input, AD converter adopts 28335 inner 12bitAD.
The digital input signals that 4 road DI input terminals that DIDO connects connect comprises: rectifier bridge left side brachium pontis fault, right brachium pontis fault, inverter bridge left side brachium pontis fault, right brachium pontis fault, drive plate line under-voltage fault; The digital output signal of DO output comprises: 8 road pwm signals, block by-passing signal and drive plate reset signal.
Those of ordinary skill in the art will be appreciated that; Above embodiment only is the technical scheme that is used for explaining the utility model; And be not the qualification that is used as the utility model; Any connotation based on the utility model is to variation, modification that the above embodiment did, all will drop in the protection range of claim of the utility model.
Claims (5)
1. comprehensive overcurrent protection quality of power supply control device; Comprise the electric current and voltage adjustment module and detect control module; Described comprehensive overcurrent protection quality of power supply control device is connected between three-phase system power supply and the sensitive loads, and the detection input of described detection control module is connected to the three-phase system power supply, the control output end of described detection control module; Be connected to the electric current and voltage adjustment module, it is characterized in that:
Described electric current and voltage adjustment module is a multipleization cascade IGBT power model, and every voltage compensation unit that is connected in series by n is formed, wherein 1≤n≤20;
Described detection control module is provided with comprehensive current foldback circuit, and described comprehensive current foldback circuit comprises current-limiting protection unit, Uce detecting unit, excessive current detection unit, current sensor;
The output of described current-limiting protection unit is connected in parallel with the output of IGBT drive circuit, and is connected to the grid of protected IGBT power model;
Described current sensor is connected in the electric current output loop of IGBT power model, and the detection output of current sensor is connected to described excessive current detection unit;
The input of described Uce detecting unit is connected to the collector electrode of IGBT power model;
Described current-limiting protection unit is provided with two inputs, and an input is connected to the Uce detecting unit, and another input is connected to said excessive current detection unit through optocoupler or optical fiber isolation.
2. comprehensive overcurrent protection quality of power supply control device according to claim 1; The main circuit that it is characterized in that described voltage compensation unit is the H bridge power unit circuit that IGBT connects to form; Each voltage compensation unit is connected to the three-phase system power supply through a multi-winding isolation transformer; The input of each road H bridge power unit circuit is connected to a secondary winding of isolating transformer through rectification circuit.
3. comprehensive overcurrent protection quality of power supply control device according to claim 1; It is characterized in that described electric current and voltage adjustment module comprises the harmonic current compensation unit, the main circuit of described harmonic current compensation unit is the H bridge power unit circuit that IGBT connects to form; Each of described isolating transformer also is included as the secondary winding of harmonic current compensation unit power supply mutually; The harmonic current compensation unit of each phase is connected to the three-phase system power supply through the secondary winding of isolating transformer respectively, and the input of the H bridge power unit circuit of harmonic current compensation unit is connected to a secondary winding of isolating transformer through rectification circuit; Being connected the same harmonic current compensation unit of going up mutually of three-phase system power supply is connected with the voltage compensation units in series.
4. according to claim 1,2 or 3 described comprehensive overcurrent protection quality of power supply control device, it is characterized in that described detection control module comprises digital signal processor, signal condition element and current/voltage-converted element; Described digital signal processor is provided with AD converter and PWM output port, and the input end of analog signal of said AD converter is connected to three-phase system power source voltage instrument transformer summation current transformer through signal condition element and current/voltage-converted element; Said PWM output port is connected respectively to the grid of the IGBT of each harmonic current compensation unit, voltage compensation unit, road through the IGBT drive circuit.
5. comprehensive overcurrent protection quality of power supply control device according to claim 4; It is characterized in that described detection control module also comprises NIU, described digital signal processor is connected to the grid monitoring system of three-phase system power supply through NIU.
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| CN2012201344258U CN202550534U (en) | 2012-04-01 | 2012-04-01 | Comprehensive overcurrent protection power quality control device |
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| CN2012201344258U CN202550534U (en) | 2012-04-01 | 2012-04-01 | Comprehensive overcurrent protection power quality control device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092202A (en) * | 2014-07-14 | 2014-10-08 | 国家电网公司 | Distributed power failure protection device and method suitable for multi-source power grid |
| CN110460080A (en) * | 2019-09-10 | 2019-11-15 | 国网四川省电力公司电力科学研究院 | A kind of voltage compensation type battery energy storage converter and its control method |
-
2012
- 2012-04-01 CN CN2012201344258U patent/CN202550534U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092202A (en) * | 2014-07-14 | 2014-10-08 | 国家电网公司 | Distributed power failure protection device and method suitable for multi-source power grid |
| CN104092202B (en) * | 2014-07-14 | 2017-09-05 | 国家电网公司 | A kind of distributed power source failure protecting device and method suitable for multi-source power network |
| CN110460080A (en) * | 2019-09-10 | 2019-11-15 | 国网四川省电力公司电力科学研究院 | A kind of voltage compensation type battery energy storage converter and its control method |
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