CN202564949U - Mutual-standby protection type electric energy quality control device - Google Patents
Mutual-standby protection type electric energy quality control device Download PDFInfo
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- CN202564949U CN202564949U CN2012201352428U CN201220135242U CN202564949U CN 202564949 U CN202564949 U CN 202564949U CN 2012201352428 U CN2012201352428 U CN 2012201352428U CN 201220135242 U CN201220135242 U CN 201220135242U CN 202564949 U CN202564949 U CN 202564949U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a mutual-standby protection type electric energy quality control device, which relates to a circuit device used for an alternating-current trunk line or an alternating-current power distribution network, in particular to a device suitable for a high-voltage alternating-current power grid to stabilize voltage and reduce harmonic waves or ripples. The mutual-standby protection type electric energy quality control device is connected between a three-phase system power supply and a sensitive load and comprises a voltage and current regulation module and a detection control module, wherein the voltage and current regulation module is a multiple-cascading IGBT (insulated gate bipolar translator) power module; each phase consists of n voltage compensation units connected in series; the main circuit of the voltage compensation unit is an H bridge power unit circuit formed by connecting the IGBT; each voltage compensation unit is connected to the three-phase system power supply by a multiple-winding isolation transformer; and the input end of each path of the H bridge power unit circuit is connected to one secondary winding of the isolation transformer by a rectification circuit. According to the device disclosed by the utility model, the power supply electric energy quality of a sensitive customer can be obviously improved, and the device can be guaranteed to still operate even if parts of modules of the device fail by the protection strategy that modules are mutually standby modules.
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 mutual protection type quality of power supply control device fully will be provided, and 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 protection type quality of power supply control device that is equipped with mutually; Be connected between three-phase system power supply and the sensitive loads; Comprise the electric current and voltage adjustment module and detect control module, 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;
The main circuit of described voltage compensation unit is the H bridge power unit circuit that IGBT connects to form, and described H bridge power unit circuit is provided with and detects control element mutually fully; Detect the DC side that control element is parallel-connected to H bridge power unit circuit mutually fully; The described input control end that detects control element mutually fully is connected to described detection control module.
A kind of optimized technical scheme that is equipped with protection type quality of power supply control device mutually of the utility model; It is characterized in that described 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 that is equipped with protection type quality of power supply control device mutually 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 that is equipped with protection type quality of power supply control device mutually 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 improved technical scheme that is equipped with protection type quality of power supply control device mutually 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 mutual protection type quality of power supply control device that is equipped with 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.
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,, but still can move when the assurance device part of module breaks down through protection strategy subsequent use each other between the module.
Description of drawings
Fig. 1 is the main circuit diagram that is equipped with protection type quality of power supply control device mutually 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 that is equipped with protection type quality of power supply control device mutually of the utility model;
Fig. 4 is the control unit circuit figure that is equipped with protection type quality of power supply control device mutually of the utility model.
The label of each parts in more than scheming: 100-three phase mains, multipleization of 200-cascade IGBT power model, 201～20nH bridge power model; 210-harmonic current compensation unit, 300-digital signal processor, 310-AD transducer; The 320-PWM output port, 400-signal condition element, 410-current/voltage-converted element; The 500-NIU, 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 that is equipped with protection type quality of power supply control device mutually of the utility model; Comprise electric current and voltage adjustment module 200 and detect the control module (not shown); The described protection type quality of power supply control device that is equipped with mutually 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.
Fig. 3 is the H bridge element circuit figure that is equipped with protection type quality of power supply control device mutually 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.
H bridge power unit circuit 201～20n is provided with and detects control element Tf mutually fully; Detect the DC side that control element Tf is parallel-connected to H bridge power unit circuit 201～20n mutually fully; The described input control end that detects control element Tf mutually fully is connected to described detection control module.
When any one voltage or current compensation unit broke down, described detection control module can be controlled and detect control element Tf mutually fully by-path turn-on is provided; When indivedual H bridges of fundamental module break down, can unify control with fundamental module with high-frequency model as fundamental module, thereby satisfy the compensation of transient voltage disturbance; Equally, when the device high-frequency model broke down, fundamental module also can replace high-frequency model, the attenuation characteristic of high frequency content was realized the compensation of high frequency content through control strategy.
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=12=...=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 that is equipped with protection type quality of power supply control device mutually 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 that is equipped with protection type quality of power supply control device mutually 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. one kind is equipped with protection type quality of power supply control device mutually; Be connected between three-phase system power supply and the sensitive loads; Comprise the electric current and voltage adjustment module and detect control module, 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;
The main circuit of described voltage compensation unit is the H bridge power unit circuit that IGBT connects to form, and described H bridge power unit circuit is provided with and detects control element mutually fully, detects the DC side that control element is parallel-connected to H bridge power unit circuit mutually fully; The described input control end that detects control element mutually fully is connected to described detection control module.
2. the protection type quality of power supply control device that is equipped with mutually according to claim 1; It is characterized in that described 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. the protection type quality of power supply control device that is equipped with mutually according to claim 2; 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, the 2 or 3 described protection type quality of power supply control device that are equipped with mutually, 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, the input end of analog signal of said AD converter,
Be 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. the protection type quality of power supply control device that is equipped with mutually 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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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201352428U CN202564949U (en) | 2012-04-01 | 2012-04-01 | Mutual-standby protection type electric energy quality control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201352428U CN202564949U (en) | 2012-04-01 | 2012-04-01 | Mutual-standby protection type electric energy quality control device |
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| CN202564949U true CN202564949U (en) | 2012-11-28 |
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| CN2012201352428U Expired - Lifetime CN202564949U (en) | 2012-04-01 | 2012-04-01 | Mutual-standby protection type electric energy quality control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111262216A (en) * | 2020-01-02 | 2020-06-09 | 北京大华无线电仪器有限责任公司 | High-speed source-borne protection device with far-end compensation |
-
2012
- 2012-04-01 CN CN2012201352428U patent/CN202564949U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111262216A (en) * | 2020-01-02 | 2020-06-09 | 北京大华无线电仪器有限责任公司 | High-speed source-borne protection device with far-end compensation |
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Granted publication date: 20121128 |