CN103326360B - A kind of real-time dynamic active harmonic compensation arrangement for high-voltage system - Google Patents
A kind of real-time dynamic active harmonic compensation arrangement for high-voltage system Download PDFInfo
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- CN103326360B CN103326360B CN201210074099.0A CN201210074099A CN103326360B CN 103326360 B CN103326360 B CN 103326360B CN 201210074099 A CN201210074099 A CN 201210074099A CN 103326360 B CN103326360 B CN 103326360B
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- bridge link
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- link inversion
- dsp
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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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Abstract
The present invention relates to a kind of real-time dynamic active harmonic compensation arrangement for high-voltage system, this device parallel connection access high-voltage system, described compensation arrangement comprises main circuit, control circuit and high-pressure hollow reactor, described main circuit comprises H bridge link inversion unit, described control circuit comprises the main control unit and H bridge link inversion control unit that connect successively, described H bridge link inversion unit is connected with main control unit and H bridge link inversion control unit respectively, and described H bridge link inversion unit is connected with high-voltage system by high-pressure hollow reactor.Compared with prior art, the present invention has the advantages such as high-speed, high precision, effective compensation harmonic wave and reactive power.
Description
Technical field
The present invention relates to a kind of active harmonic carcellation device, especially relate to a kind of real-time dynamic active harmonic compensation arrangement for high-voltage system.
Background technology
Active power filter (Active Power Filter, is abbreviated as APF) is the effective measures of administering Harmonious Waves in Power Systems, improving the quality of power supply.The harmonic and reactive currents that nonlinear-load produces produces electrical network and pollutes, and brings serious harm by network system, power supply department and power consumer.The parallel connection type passive filter generally adopted at present also exists filter effect difference, responsive to electrical network parameter, component size is huge, causes the defects such as series parallel resonance accident time serious.As compared to traditional passive filter (Passive Filter, is abbreviated as PF), active power filter has can compensate each harmonic, suppress flickering, compensating reactive power, the technical advantages such as the harmonic wave of automatic tracking and compensating change.Along with the fast development of power electronic technology, the performance such as conducting capacity, switching frequency of power electronic device improves greatly, PWM control technology also reaches its maturity, adopt the active power filter technology of modern power electronics technology, Digital Signal Processing and advanced control theory to carry out dynamic realtime compensation to mains by harmonics, can be considered the approach solving now the most effective of harmonic pollution problems and most potentiality.At present, active power filter oneself become study hotspot in electric and electronic technical field, many countries using Active Power Filter-APF as the key technology and the measure that improve the quality of power supply, in China, also there is boundless application prospect.
Active power filter system forms primarily of two large divisions, namely instruction current computing circuit and offset current circuit for generating (by current follow-up control circuit, drive circuit and main circuit three part form).
The function of instruction current computing circuit is mainly from load current i
lharmonic wave, reactive current i is isolated in (t)
lq(t) and fundamental active current i
lp, then will there is the command signal i of offset current after its reversed polarity effect in (t)
c(t)=i
lq(t).The function of current follow-up control circuit is the offset current i produced according to main circuit
c, calculate the trigger impulse of each switching device of main circuit, this pulse acts on main circuit after drive circuit, produces offset current i
c(t),
i
s(t)＝i
L(t)-i
C(t)＝i
Lp(t)+i
lq(t)-i
C(t)＝i
LP(t)
I.e. source current i
sreal component i only containing first-harmonic in (t)
lp(t), thus reach harmonic carcellation and the object of carrying out reactive power compensation.According to same principle, active power filter can also the negative-sequence current component of right title three-phase circuit compensate.C in accompanying drawing 1
1and L
1form a passive filter circuit, can filtering PWM export high frequency switching ripple, L
1play simultaneously and convert DC side PWM voltage signal to offset current i
ceffect.C
1for DC side energy-storage travelling wave tube, series resistance R represents active filter loss.Switching device S1 ~ S4 adopts IGBT and diode inverse parallel to form.
The main circuit of active power filter is generally made up of PWM inverter.According to the difference of inverter direct-flow side energy-storage travelling wave tube, voltage-type APF (energy-storage travelling wave tube is electric capacity) and current mode APF (energy-storage travelling wave tube is inductance) can be divided into.Voltage-type APF operationally needs to control DC capacitor voltage, and DC voltage is remained unchanged, and thus inverter ac side exports as PWM voltage wave.The advantage of voltage-type APF is that loss is less, and efficiency is high, is the mode that current domestic and international most APF adopts.
The most critical part that high-tension electricity active filter is different from low-voltage power active filter is how to realize offset current circuit for generating, and the voltage endurance due to power electronic device itself makes active power filter be difficult to expanded application in high-pressure system.
Summary of the invention
Object of the present invention is exactly dynamic active harmonic compensation device when providing a kind of effective compensation harmonic wave and reactive power, efficient, stable high-pressure solid to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of real-time dynamic active harmonic compensation arrangement for high-voltage system, this device parallel connection access high-voltage system, it is characterized in that, described compensation arrangement comprises main circuit, control circuit and high-pressure hollow reactor, described main circuit comprises H bridge link inversion unit, described control circuit comprises the main control unit and H bridge link inversion control unit that connect successively, described H bridge link inversion unit is connected with main control unit and H bridge link inversion control unit respectively, described H bridge link inversion unit is connected with high-voltage system by high-pressure hollow reactor,
Main control unit gathers the signal of high-voltage system, and receive the direct current signal of H bridge link inversion control unit feedback, after main control unit compares process to signal, to H bridge link inversion unit sending controling instruction, compensate harmonic wave and the reactive power of high-voltage system.
Described H bridge link inversion unit comprises input terminal, lead-out terminal, IGBT inverter bridge group and DC capacitor group, and described IGBT inverter bridge group and the parallel connection of DC capacitor group, described IGBT inverter bridge group is provided with input terminal and lead-out terminal.
Described H bridge link inversion unit is provided with multiple, the input terminal of first H bridge link inversion unit connects high-pressure hollow reactor, the lead-out terminal of last H bridge link inversion unit connects high-voltage system, and the input terminal of middle H bridge link inversion unit connects the lead-out terminal being adjacent H bridge link inversion unit.
Described each H bridge link inversion unit is corresponding with a H bridge link inversion control unit.
Described main control unit comprises many dsp chips coprocessor, voltage-current sensor, operational amplifier and AD conversion chip, and described voltage-current sensor, operational amplifier, AD conversion chip are connected successively with many dsp chips coprocessor;
Voltage-current sensor gathers the voltage and current signal of high-voltage system, this signal following with modulation transmissions to AD conversion chip by operational amplifier, signal is converted to digital signal and is sent to many dsp chips coprocessor by AD conversion chip, many dsp chips coprocessor receives the direct current signal of signal that AD conversion chip exports and H bridge link inversion control unit feedback, by communication and control bus to each H bridge link inversion unit sending controling instruction.
Described many dsp chips coprocessor comprises four dsp chips and a FPGA Programmable Logic Device, and four described dsp chips and a FPGA Programmable Logic Device carry out exchanges data by pci bus between any two.
Described H bridge link inversion control unit comprises DSP computing circuit, the 2nd FPGA Programmable Logic Device, DC side sampling module, DC side power taking DC/DC module and ultra high speed A/D conversion circuit, and described DC side sampling module, ultra high speed A/D conversion circuit, DSP computing circuit are connected successively with the 2nd FPGA Programmable Logic Device; Ultra high speed A/D conversion circuit receives the direct current signal of DC side sampling module transmission, DSP computing circuit is sent to after being converted into digital signal, after DSP computing circuit and the 2nd FPGA Programmable Logic Device process signal, be sent to main control unit by control and synchronization signal bus.
Compared with prior art, the present invention has following advantage:
1) digital processing circuit of high-speed, high precision: main control unit of the present invention adopts the 4DSP multinuclear associated treatment technology based on PIC bus, the dominant frequency of every block DSP core is up to 1Ghz, 4 pieces of dsp chips are by PIC bus exchanging data, and the intervention of FPGA makes the exchanges data of whole data flow reliable and stable;
2) the H bridge link inversion unit of low-voltage-grade: the core switching device of H bridge link inversion unit is the IGBT module of 1700V, the IGBT module of this model belongs to switching device very conventional in industrial system, ensure that the simple realization of H bridge link inversion unit, each independent H bridge inverter unit is identical, and modular H bridge link inversion unit is that reliable basis has been established in the stable operation of whole system;
3) stable Industrial Ethernet field bus technique: Industrial Ethernet is a kind of Ethernet commercial Application of agreement Network Based, coordinates the use of optical fiber to make the real-time of whole system and synchronism obtain best optimization;
4) multichannel innovated, multilink control technology: but having in whole system and multiplely seem independent H bridge link inversion unit of combining closely in synchronous working, multilink control technology of the present invention ensure that whole system operationally stable and reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation of H bridge link inversion unit of the present invention;
Fig. 2 is the structured flowchart of main control unit of the present invention;
Fig. 3 is the control block diagram of H bridge link inversion control unit of the present invention;
Fig. 4 is the structured flowchart of H bridge link inversion control unit of the present invention;
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of real-time dynamic active harmonic compensation arrangement for high-voltage system, this device parallel connection access high-voltage system, this device comprises main circuit, control circuit and high-pressure hollow reactor, main circuit comprises multiple H bridge link inversion unit, control circuit comprises the main control unit and H bridge link inversion control unit that connect successively, H bridge link inversion unit is connected with main control unit and H bridge link inversion control unit respectively, H bridge link inversion unit is connected with high-voltage system by high-pressure hollow reactor, each H bridge link inversion unit in main circuit is corresponding with a H bridge link inversion control unit.
As shown in Figure 1-2, H bridge link inversion unit comprises input terminal 1, lead-out terminal 2, IGBT inverter bridge group 3 and DC capacitor group 4, IGBT inverter bridge group 3 and DC capacitor group 4 is in parallel, and IGBT inverter bridge group 3 is provided with input terminal 1 and lead-out terminal 2.Every mutually in the input terminal 1 of first H bridge link inversion unit connect high-pressure hollow reactor 5, the lead-out terminal 2 of last H bridge link inversion unit connects high-voltage system, and the input terminal 1 of middle H bridge link inversion unit connects the lead-out terminal 2 being adjacent H bridge link inversion unit.
As shown in Figure 3, main control unit comprises many dsp chips coprocessor 6, voltage-current sensor 7, operational amplifier 8 and AD conversion chip 9, and voltage-current sensor 7, operational amplifier 8, AD conversion chip 9 are connected successively with many dsp chips coprocessor 6.Many dsp chips coprocessor 6 comprises four dsp chips and the fpga logic circuit that carry out exchanges data with pci bus, four dsp chips are respectively main dsp chip 10, A phase dsp chip 11, B phase dsp chip 12 and C phase dsp chip 13, main dsp chip 10 is responsible for the sampling computational analysis of high-voltage system data, A phase dsp chip 11, B phase dsp chip 12 and C phase dsp chip 13 are responsible for A in electric power system respectively, B, the data acquisition of many H bridge link inversion control unit of each phase of C three-phase and control signal download work, competition when fpga logic circuit is responsible for four dsp chip collaborative works and process control.
As shown in Figure 4, H bridge link inversion control unit comprises DSP computing circuit 19, FPGA Programmable Logic Device 15, DC side sampling module 16, DC side power taking DC/DC module 17 and ultra high speed A/D conversion circuit 18, and DC side sampling module 16, ultra high speed A/D conversion circuit 18, DSP computing circuit 19 are connected successively with FPGA Programmable Logic Device 15; H bridge link inversion control unit is responsible for the DC side signal gathering the H bridge link inversion unit corresponding with it, is sent to main control unit after process by control and synchronization signal bus.
Owing to being synchronous real-time working, the present invention will combine from two aspects at work:
1) control circuit part: the voltage and current signal of phase each in high-voltage system gathers into many dsp chips coprocessor 6 by voltage-current sensor 7 by main control unit, main dsp chip 10 uses the theoretical quick separating that fast Fourier analysis combined with instantaneous reactive algorithm of power flow control to go out for compensating the harmonic current and fundamental reactive current that load produces, and main dsp chip 10 is by the respective dsp chip being sent to three-phase real-time for signal; The dsp chip of each phase calculates the ordering calculation order of each H bridge link inversion unit of subordinate according to the DC information analysis meter that the H bridge link inversion unit of the every one-level of subordinate feeds back, and this algorithm is issued to each H bridge link inversion unit at a high speed.The DC inversion source of every one-level is connected to system by each H bridge link inversion unit control IGBT inverter bridge group after the ordering calculation circuit receiving main control unit transmission.
2) main circuit part: equipment in the process of work in (for 10KV system) whole system 27 H bridge link inversion units be all in synchronous working state, the energy of position different relative to system can be obtained by different switch combinations, and to Systemic absorption or transmission energy.
Claims (5)
1. the real-time dynamic active harmonic compensation arrangement for high-voltage system, this device parallel connection access high-voltage system, it is characterized in that, described compensation arrangement comprises main circuit, control circuit and high-pressure hollow reactor, described main circuit comprises H bridge link inversion unit, described control circuit comprises the main control unit and H bridge link inversion control unit that connect successively, described H bridge link inversion unit is connected with main control unit and H bridge link inversion control unit respectively, described H bridge link inversion unit is connected with high-voltage system by high-pressure hollow reactor,
Main control unit gathers the signal of high-voltage system, and receive the direct current signal of H bridge link inversion control unit feedback, after main control unit compares process to signal, to H bridge link inversion unit sending controling instruction, compensate harmonic wave and the reactive power of high-voltage system;
Described main control unit comprises many dsp chips coprocessor, voltage-current sensor, operational amplifier and AD conversion chip, and described voltage-current sensor, operational amplifier, AD conversion chip are connected successively with many dsp chips coprocessor;
Voltage-current sensor gathers the voltage and current signal of high-voltage system, this signal following with modulation transmissions to AD conversion chip by operational amplifier, signal is converted to digital signal and is sent to many dsp chips coprocessor by AD conversion chip, many dsp chips coprocessor receives the direct current signal of signal that AD conversion chip exports and H bridge link inversion control unit feedback, by communication and control bus to each H bridge link inversion unit sending controling instruction;
Described many dsp chips coprocessor comprises four dsp chips and a FPGA Programmable Logic Device, and four described dsp chips and a FPGA Programmable Logic Device carry out exchanges data by pci bus between any two;
Four dsp chips are respectively main dsp chip, A phase dsp chip, B phase dsp chip and C phase dsp chip, main dsp chip is responsible for the sampling computational analysis of high-voltage system data, A phase dsp chip, B phase dsp chip and C phase dsp chip are responsible for data acquisition and the control signal download work of many H bridge link inversion control unit of each phase of A, B, C three-phase in electric power system respectively, a competition when FPGA Programmable Logic Device is responsible for four dsp chip collaborative works and process control; The voltage and current signal of phase each in high-voltage system gathers into many dsp chips coprocessor by voltage-current sensor by main control unit, main dsp chip uses the theoretical quick separating that fast Fourier analysis combined with instantaneous reactive algorithm of power flow control to go out for compensating the harmonic current and fundamental reactive current that load produces, and main dsp chip is by the respective dsp chip being sent to three-phase real-time for signal; The dsp chip of each phase calculates the ordering calculation order of each H bridge link inversion unit of subordinate according to the DC information analysis meter that the H bridge link inversion unit of the every one-level of subordinate feeds back, and this algorithm is issued to each H bridge link inversion unit at a high speed; The DC inversion source of every one-level is connected to system by each H bridge link inversion unit control IGBT inverter bridge group after the ordering calculation order receiving main control unit transmission.
2. a kind of real-time dynamic active harmonic compensation arrangement for high-voltage system according to claim 1, it is characterized in that, described H bridge link inversion unit comprises input terminal, lead-out terminal, IGBT inverter bridge group and DC capacitor group, described IGBT inverter bridge group and the parallel connection of DC capacitor group, described IGBT inverter bridge group is provided with input terminal and lead-out terminal.
3. a kind of real-time dynamic active harmonic compensation arrangement for high-voltage system according to claim 2, it is characterized in that, described H bridge link inversion unit is provided with multiple, the input terminal of first H bridge link inversion unit connects high-pressure hollow reactor, the lead-out terminal of last H bridge link inversion unit connects high-voltage system, and the input terminal of middle H bridge link inversion unit connects the lead-out terminal being adjacent H bridge link inversion unit.
4. a kind of real-time dynamic active harmonic compensation arrangement for high-voltage system according to claim 3, is characterized in that, described each H bridge link inversion unit is corresponding with a H bridge link inversion control unit.
5. a kind of real-time dynamic active harmonic compensation arrangement for high-voltage system according to claim 1, it is characterized in that, described H bridge link inversion control unit comprises DSP computing circuit, the 2nd FPGA Programmable Logic Device, DC side sampling module, DC side power taking DC/DC module and ultra high speed A/D conversion circuit, and described DC side sampling module, ultra high speed A/D conversion circuit, DSP computing circuit are connected successively with the 2nd FPGA Programmable Logic Device; Ultra high speed A/D conversion circuit receives the direct current signal of DC side sampling module transmission, DSP computing circuit is sent to after being converted into digital signal, after DSP computing circuit and the 2nd FPGA Programmable Logic Device process signal, be sent to main control unit by control and synchronization signal bus.
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| US9190993B1 (en) * | 2015-01-08 | 2015-11-17 | United Silicon Carbide, Inc. | High voltage switch |
| CN106684883A (en) * | 2015-11-06 | 2017-05-17 | 河南理工大学 | Chained STATCOM modularized decoupling reactive compensation device |
| CN107046303B (en) * | 2016-11-29 | 2023-06-02 | 三峡大学 | Equivalent reactive battery circuit and control method thereof |
| CN110556870A (en) * | 2019-10-17 | 2019-12-10 | 国网黑龙江省电力有限公司电力科学研究院 | Multifunctional non-isolated converter device for distribution network level distributed new energy grid connection |
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| CN102004455A (en) * | 2010-09-25 | 2011-04-06 | 天津理工大学 | STATCOM (Static Synchronous Compensator) control system based on mixed chaotic sequence generator |
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| CN201435610Y (en) * | 2009-07-09 | 2010-03-31 | 上海艾帕电力电子有限公司 | Device for controlling power quality comprehensively |
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