CN203859521U - Active comprehensive power quality regulating device - Google Patents
Active comprehensive power quality regulating device Download PDFInfo
- Publication number
- CN203859521U CN203859521U CN201420204332.7U CN201420204332U CN203859521U CN 203859521 U CN203859521 U CN 203859521U CN 201420204332 U CN201420204332 U CN 201420204332U CN 203859521 U CN203859521 U CN 203859521U
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- signal
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The utility model relates to an active comprehensive power quality regulating device, which comprises a signal detection and pretreatment circuit, a compensation signal synthesizer, a protection loop, a comparator, a compensation control driver, a variable current main circuit, a composite compensation current output loop, a PI adjuster, a reference signal generator, a compensation capacity controller and a voltage reference signal generator. The active comprehensive power quality regulating device can be hooked to a power supplying system of 10kV or other voltage grades for use, serialized, standardized and modularized production can be realized, the active comprehensive power quality regulating device can be applied to harmonic treatment of quickly-changed harmonic source loads of various kinds, reactive power compensation and voltage fluctuation caused by load regulation, the response speed is fast, and problems of unbalanced three phases, reactive over compensation, system resonance and the like can be effectively solved.
Description
Technical field
The utility model belongs to electrical technology field, relate to the compound compensation equipment of the quality of power supply, especially a kind of active type quality of power supply comprehensive regulation device (PQCCD-PowerQualityCompoundControl Device) taking the quality of power supply as main regulation and control object.
Background technology
The voltage that normal utility network provides should be the sinusoidal waveform with fixed frequency, regulation amplitude and three-phase equilibrium, but in fact in electrical network, exist the nonlinear-loads such as a large amount of milling trains, arc furnace, electric railway traction locomotive, induction furnace, converter and all kinds of power electronic equipments, these loads not only produce a large amount of harmonic current injection electrical networks in running, some three-phase current unbalances, what have has a feature such as intermittence, impact, thereby cause supply power voltage wave distortion, and voltage fluctuation, flickering, the problem such as be interrupted, subside.In utility network, extensively exist above-mentioned power quality problem, directly have influence on the safety and economic operation of electric power system and user's electric equipment.
The device that improves at present the quality of power supply has passive power filter (PPF), Active Power Filter-APF (APF), Dynamic Voltage Regulator (DVR), static reacance generator (SVG) etc.Filtering when passive power filter (PPF) is mainly used in needing reactive power compensation and pressure regulation; Active filter (APF) is mainly used to compensate the harmonic current that various nonlinear-loads produce; Dynamic Voltage Regulator (DVR) is mainly used to compensate the transient changing of supply power voltage; Static reacance generator (SVG) is a kind of parallel connection type reactive power compensator, it can not only send or absorbing reactive power, and by regulating its output can regulate and control the meritorious parameter in electric power system, but owing to being subject to the restriction of self-condition, can not regulate and control other index of the quality of power supply comprehensively.
In sum, compensating parameter and the compensation performance of existing all kinds of electric energy quality compensating devices are limited, and a covering device can not complete the task of the multinomial power quality index of compensation simultaneously.Along with the development of high-power semiconductor switch device, large electric current, high-tension IGBT element are widely used in the devices such as Active Power Filter-APF (APF), Dynamic Voltage Regulator (DVR) and static reacance generator (SVG).At present, the devices such as Active Power Filter-APF (APF), Dynamic Voltage Regulator (DVR) and static reacance generator (SVG), no matter be on major loop structure, or on its control system and control strategy, there are many same or analogous places, as long as they are carried out to suitable function synthesized and architecture advances, just can become a kind of novel active type quality of power supply comprehensive regulation device of the compensate function with above-mentioned several devices.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art part, a kind of active type quality of power supply comprehensive regulation device is provided, this device simultaneously harmonic current to various loads, first-harmonic phase shift power factor, voltage fluctuation and three-phase imbalance carries out active compensation, there is the adaptivity of height, the quality of power supply of the points of common connection that can effectively ensure to power.
The purpose of this utility model is achieved through the following technical solutions:
A kind of active type quality of power supply comprehensive regulation device, formed by input and pre-process circuit, compensating signal synthesizer, protection loop, comparator, compensation control driver, unsteady flow major loop, combined compensation electric current output loop, pi regulator, reference signal generator, compensation capacity controller, voltage reference signal maker, input and pre-process circuit detection line electric current and bus voltage signal, and do preliminary treatment, afterwards, the control signal of signal synthesizer by way of compensation; The voltage reference signal that busbar voltage produces through voltage reference signal maker generates compensation capacity control signal through compensation capacity controller together with the output signal of pi regulator; The output signal of input and pre-process circuit and compensation capacity controller enters compensating signal synthesizer, and the compensating signal that compensating signal synthesizer is exported under protection loop protection enters comparator; Reference signal generator produces triangular signal, in comparator, compare with the output signal of compensating signal synthesizer, and produce the modulated signal of corresponding pulse duration under protection loop protection, after driver Amplification and insulation is controlled in compensation, for driving the turn-on and turn-off of each IGBT element of unsteady flow major loop, thereby produce needed combined compensation electric current, combined compensation electric current is entered supply line and is realized the compound regulation and control of the quality of power supply by combined compensation electric current output loop link; Unsteady flow major loop and combined compensation electric current output loop are sent into feedback signal respectively protection loop, with the autoprotection of finishing device.
And described unsteady flow major loop adopts three-phase independence bridge current transformer and high-low variable pressure structure of multiplex, unsteady flow bridge and direct current capacitor that the carrier wave absorbing circuit being made up of transformer, reactor and AC capacitor, many IGBT elements form form; The high-pressure side three-phase winding parallel of transformer is on the 10kV or other voltage gradation bus of electric power system, all access carrier absorbing circuits of the each phase winding of low-pressure side, output offset current enters supply line by combined compensation electric current output loop link, realizes the compound regulation and control of the quality of power supply.
And, what described compensation capacity controller adopted is the digital-analogue formula compensation capacity controller that high-speed dsp and Industrial Control Computer combine, and is detected loop, keyboard, display and host computer communication interface and is formed by Industrial Control Computer, high speed digital signal processor DSP, random two-way memory DARAM, three-phase voltage and three-phase current detection loop, pre-shaping Phase-Locked Synchronous sampling circuit, measuring-signal output circuit, compensating signal output circuit, control signal output circuit, major loop drive circuit, fault monitoring signal circuit, operating state.
Advantage of the present utility model and good effect are:
1, the utility model is adjusted the major loop structure of existing active power compensator, increases the many-side improvement such as capacity, improvement control strategy simultaneously and forms; The digital-analogue formula Mersure Controler that adopts high-speed dsp and Industrial Control Computer to combine, the major loop forming with large power semiconductor device, has special topological structure.The advantage of this main circuit structure is:
The first, realize the output of high-tension high-power, solved the problem of active power compensator off-capacity in the past.
The second, because this main circuit uses the transformer (T) of step-down, by 10kV high voltage, through step-down injection transformer, become 1000V and following low-voltage, thereby realize under low-voltage and modulated unsteady flow, can reduce du/dt, effectively reduced the switching loss of device simultaneously.
Three, main circuit adopts three-phase independence bridge construction, is applicable to harmonic and the compensating fundamental wave of any three-phase equilibrium and unbalanced nonlinear-load; Also can be easily the structure of three-phase 10kV level be expanded to the structure for single-phase 27.5kV level, be directly parallel to the electricity Tie supply line of 27.5kV, can effectively administer the harmonic wave of electric railway and do not increase reactive compensation capacity.
Four, the DC side of three-phase independence bridge current transformer shares same group of high-capacity direct current capacitor (Cd), makes direct current capacitor (Cd) side voltage more stable, with the three-phase equilibrium of AC side of converter voltage in assurance device regulation process.
2, the utility model can use in the electricity supplying and using system of 10kV or other electric pressure in direct screening, practicable seriation, standardization, modularization are produced, to be adapted to harmonic wave control and the reactive power compensation of all kinds of fast-changing harmonic-producing loads, and the voltage fluctuation that regulates and controls to load and cause, fast response time; Can effectively solve three-phase imbalance simultaneously, mend and the problem such as system resonance without merits and demerits.
Brief description of the drawings
Fig. 1 is the functional-block diagram of the utility model access power circuit;
Fig. 2 is the circuit theory diagrams of the unsteady flow major loop (06) of Fig. 1;
Fig. 3 is the functional-block diagram of the compensation capacity controller (10) of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described; The present embodiment is descriptive, is not determinate, can not limit thus protection range of the present utility model.
A kind of active type quality of power supply comprehensive regulation device, referring to Fig. 1, by input and pre-process circuit (01), compensating signal synthesizer (02), protection loop (03), comparator (04), driver (05) is controlled in compensation, unsteady flow major loop (06), combined compensation electric current output loop (07), pi regulator (08), reference signal generator (09), compensation capacity controller (10), the link compositions such as voltage reference signal maker (11), its concrete signal trend is: after switching on power, by input and pre-process circuit (01) detection line electric current and bus voltage signal, and do preliminary treatment, afterwards, the control signal of signal synthesizer (02) by way of compensation, the voltage reference signal that busbar voltage produces through voltage reference signal maker (11) passes through compensation capacity controller (10) and generates compensation capacity control signal together with the output signal of pi regulator (08), the output signal of input and pre-process circuit (01) and compensation capacity controller (10) enters compensating signal synthesizer (02), and the compensating signal of compensating signal synthesizer (02) output under the protection of protection loop (03) enters comparator (04), reference signal generator (09) produces the triangular signal that frequency is 10kHz left and right, in comparator (04), compare with the output signal of compensating signal synthesizer (02), and produce the modulated signal of corresponding pulse duration under the protection of protection loop (03), after driver (05) Amplification and insulation is controlled in compensation, be used for driving the turn-on and turn-off of each IGBT element of unsteady flow major loop (06), thereby produce needed combined compensation electric current, combined compensation electric current enters supply line by combined compensation electric current output loop (07) link, realize the compound regulation and control of the quality of power supply, unsteady flow major loop (06) and combined compensation electric current output loop (07) are sent into feedback signal respectively protection loop (03), with the autoprotection of finishing device.
The circuit theory diagrams of the unsteady flow major loop (06) in the utility model are referring to Fig. 2, adopt three-phase independence bridge current transformer and high-low variable pressure structure of multiplex, the carrier wave absorbing circuit being formed by transformer (T), reactor and AC capacitor, many unsteady flow bridge and direct current capacitor (Cd) formations that IGBT element forms; The high-pressure side three-phase winding parallel of transformer (T) on the 10kV or other voltage gradation bus of electric power system, all access carrier absorbing circuits of the each phase winding of low-pressure side; Output offset current enters supply line by combined compensation electric current output loop (07) link, realizes the compound regulation and control of the quality of power supply.
The block diagram of the compensation capacity controller in the utility model is referring to Fig. 3, employing be the digital-analogue formula compensation capacity controller (10) that high-speed dsp (DigitalSignal Processing) and Industrial Control Computer combine.This Mersure Controler is detected the links such as loop, keyboard, display and host computer communication interface and is formed by Industrial Control Computer, high speed digital signal processor DSP, random two-way memory DARAM, three-phase voltage and three-phase current detection loop, pre-shaping Phase-Locked Synchronous sampling circuit, measuring-signal output circuit, compensating signal output circuit, control signal output circuit, major loop drive circuit, fault monitoring signal circuit, operating state.Industrial Control Computer is for regulating, control, communicate by letter and protection: the voltage of the each phase of electrical network and load current signal, after transducer, regulate and become normalized signal through ratio, after keeping by sampling, enter the A/D passage of DSP, pre-shaping Phase-Locked Synchronous sampling circuit is got three-phase voltage signal Zhong mono-tunnel as reference signal and is produced a sampling synchronization pulse and sends in DSP; Each phase voltage signal and current signal obtain corresponding first-harmonic and harmonic component value after detection and DSP computing, obtain needing again the signal of compensation by control algolithm, as a wherein road output signal of DSP, compensating signal produces pwm control signal by PWM passage again, enter the drive circuit of main circuit IGBT element, make major loop produce corresponding offset current output; Another road output signal of DSP is measuring-signal output, is input in Industrial Control Computer.DSP and Industrial Control Computer are shared measurement data by DARAM.Industrial Control Computer has light, hard, floppy drive and flash interface, and serial, parallel, ethernet interface and house dog etc., for completing the function such as real-time control, network service, data management of active type quality of power supply comprehensive regulation device; Malfunction monitoring signal and operating state detection signal are sent into Industrial Control Computer, complete control signal output after the comprehensive various types of signal of Industrial Control Computer; Keyboard, display and host computer etc. can communicate with Industrial Control Computer.This digital-analogue formula compensation capacity controller has advantages of compared with full digital controller measures accurately, regulates sensitive, fast response time.
Claims (3)
1. an active type quality of power supply comprehensive regulation device, it is characterized in that: formed by input and pre-process circuit, compensating signal synthesizer, protection loop, comparator, compensation control driver, unsteady flow major loop, combined compensation electric current output loop, pi regulator, reference signal generator, compensation capacity controller, voltage reference signal maker, input and pre-process circuit detection line electric current and bus voltage signal, and do preliminary treatment, afterwards, the control signal of signal synthesizer by way of compensation; The voltage reference signal that busbar voltage produces through voltage reference signal maker generates compensation capacity control signal through compensation capacity controller together with the output signal of pi regulator; The output signal of input and pre-process circuit and compensation capacity controller enters compensating signal synthesizer, and the compensating signal that compensating signal synthesizer is exported under protection loop protection enters comparator; Reference signal generator produces triangular signal, in comparator, compare with the output signal of compensating signal synthesizer, and produce the modulated signal of corresponding pulse duration under protection loop protection, after driver Amplification and insulation is controlled in compensation, for driving the turn-on and turn-off of each IGBT element of unsteady flow major loop, thereby produce needed combined compensation electric current, combined compensation electric current is entered supply line and is realized the compound regulation and control of the quality of power supply by combined compensation electric current output loop link; Unsteady flow major loop and combined compensation electric current output loop are sent into feedback signal respectively protection loop, with the autoprotection of finishing device.
2. active type quality of power supply comprehensive regulation device according to claim 1, it is characterized in that: described unsteady flow major loop adopts three-phase independence bridge current transformer and high-low variable pressure structure of multiplex, unsteady flow bridge and direct current capacitor that the carrier wave absorbing circuit being made up of transformer, reactor and AC capacitor, many IGBT elements form form; The high-pressure side three-phase winding parallel of transformer is on the 10kV or other voltage gradation bus of electric power system, all access carrier absorbing circuits of the each phase winding of low-pressure side, output offset current enters supply line by combined compensation electric current output loop link, realizes the compound regulation and control of the quality of power supply.
3. active type quality of power supply comprehensive regulation device according to claim 1, it is characterized in that: what described compensation capacity controller adopted is the digital-analogue formula compensation capacity controller that high-speed dsp and Industrial Control Computer combine, by Industrial Control Computer, high speed digital signal processor DSP, random two-way memory DARAM, three-phase voltage and three-phase current detection loop, pre-shaping Phase-Locked Synchronous sampling circuit, measuring-signal output circuit, compensating signal output circuit, control signal output circuit, major loop drive circuit, fault monitoring signal circuit, operating state detects loop, keyboard, display and host computer communication interface form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420204332.7U CN203859521U (en) | 2014-04-25 | 2014-04-25 | Active comprehensive power quality regulating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420204332.7U CN203859521U (en) | 2014-04-25 | 2014-04-25 | Active comprehensive power quality regulating device |
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| CN203859521U true CN203859521U (en) | 2014-10-01 |
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| CN201420204332.7U Expired - Fee Related CN203859521U (en) | 2014-04-25 | 2014-04-25 | Active comprehensive power quality regulating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016077970A1 (en) * | 2014-11-17 | 2016-05-26 | Micron Technology, Inc. | Apparatuses and methods for compensating for process, voltage, and temperature variation in a memory |
| CN105743104A (en) * | 2016-04-25 | 2016-07-06 | 哈尔滨理工大学 | Controller and control method for reactive compensation and low-order harmonic current suppression of power grid |
-
2014
- 2014-04-25 CN CN201420204332.7U patent/CN203859521U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016077970A1 (en) * | 2014-11-17 | 2016-05-26 | Micron Technology, Inc. | Apparatuses and methods for compensating for process, voltage, and temperature variation in a memory |
| US9691443B2 (en) | 2014-11-17 | 2017-06-27 | Micron Technology, Inc. | Apparatuses and methods for compensating for process, voltage, and temperature variation in a memory |
| US10068623B2 (en) | 2014-11-17 | 2018-09-04 | Micron Technology, Inc. | Apparatuses and methods for compensating for process, voltage, and temperature variation in a memory |
| CN105743104A (en) * | 2016-04-25 | 2016-07-06 | 哈尔滨理工大学 | Controller and control method for reactive compensation and low-order harmonic current suppression of power grid |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20190425 |