CN203774797U - Dynamic reactive rapid compensation system for composite electric-power load - Google Patents
Dynamic reactive rapid compensation system for composite electric-power load Download PDFInfo
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- CN203774797U CN203774797U CN201420115065.6U CN201420115065U CN203774797U CN 203774797 U CN203774797 U CN 203774797U CN 201420115065 U CN201420115065 U CN 201420115065U CN 203774797 U CN203774797 U CN 203774797U
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The utility model provides a dynamic reactive rapid compensation system for a composite electric-power load. The system includes an intelligent electric-energy detection module (4), an intelligent controller (7), an adjustable capacitor group (5) and an impedance convertor (6). One end of the adjustable capacitor group (5) and the impedance convertor (6) is connected to a power grid after being connected in parallel and the other end is grounded. The impedance convertor (6) includes a variable electric reactor (11) and an electric-power electronic power converter (12). The intelligent controller (7) is connected with the intelligent electric-power detection module (4) and a thyristor circuit in the impedance convertor (6) through data lines. The dynamic reactive rapid compensation system for the composite electric-power load is capable of solving a scientific technical problem of composite-electric-power-load reactive power rapid compensation of an intelligent power grid (a power distribution system or electric-power load) and applicable to the field of metallurgy, building material and petrochemical industries.
Description
Technical field
The utility model relates to dynamic passive compensation field, particularly relates to a kind of quick bucking-out system of dynamic reactive of composite electric load.
Background technology
Along with the development of electric power system, various novel impact loads (as industrial arc, electric locomotive, rolling mill etc.) make on low-voltage network voltage fluctuation frequent, large-scale semiconductor rectifier equipment etc. causes harmonic wave in electrical network, make quality of voltage variation, affected the work of miscellaneous equipment in electrical network.Meanwhile, there is (as semiconductor manufacturing factory etc.) in new sensitive equipment in a large number, the quality of power supply is had higher requirement, therefore, in the urgent need to improving the control appliance of the quality of power supply.
Reactive power compensation technology mainly comprises capacitor compensation (FC), synchronous compensator, saturable reactor (SR), mechanical switching capacitance (MSC), Static Var Compensator (SVC), advanced Static Var Compensator (ACVG) etc. at present.Early stage reactive compensation system is synchronous compensator and fixed compensation capacitor device, and the former operating cost is high, and complexity is installed, and the latter's compensation capacity has level, but can not regulate continuously, and likely resonance occurs.Synchronous compensator compensation way does not re-use in current reactive power compensation project.Mechanical switch opening-closing capacitor bank (MSC) is a kind of fairly simple reactive compensation system, gradable, grouping switching, but it can not be adjustable continuously.About static reacance power compensating system, although have in research both at home and abroad about main loop unit, thyristor valve, trigger control unit, power conversion unit, the control system of Static Var Compensator and the research that adopts the controlled reactor of transformer to compensate distribution side reactive power, all from " composite electric load Technology of Dynamic Reactive Power Compensation " in the utility model and different with the method for " dynamic reactive compensator " topological structure.
Electric power system is a close coupling, nonlinear complication system, is difficult to realize robustness control with traditional control method.Therefore, the quick bucking-out system of dynamic reactive of the composite electric load that the utility model provides is intended the design feature of the continuous adjustable and induction reactance converter high and low pressure isolation of the adjustable induction reactance converter of fully utilization capacitive reactance variable adjustable condenser group, induction reactance, electronic power converter, dynamically tracking reactive power changes, and makes distribution system or the dynamic equilibrium of electrical load reactive requirement; Regulate reactive-load compensator parameter by intelligent controller, realize the reactance value that carrys out dynamic regulation high voltage main circuit with the electric and electronic power translation circuit of low-voltage, thereby realize, the dynamic reactive of distribution system or electrical load is compensated fast.
The disclosed technical scheme of Chinese patent literature " Static Var Compensator (200920087271.X) based on variable reactance " is: it is by intelligent controller control variable reactor, change the electric current that flows through variable reactor, thereby reactive-load compensator circuit absorbed or send reactive current, realizing the object of load dynamic reactive power compensation.But this compensator is mainly used in static reactive power compensation, there is limitation in composite electric load field.
Summary of the invention
Technical problem to be solved in the utility model is: the limitation for existing reactive power compensation technology for composite electric load, a kind of quick bucking-out system of dynamic reactive of composite electric load is provided, this system is mainly for the situation of the power real-time change of composite electric load, can carry out dynamic reactive and compensate fast, thereby solve intelligent grid (distribution system or electrical load) composite electric load reactive power scientific and technical difficult problem for compensation fast.
The technical scheme that the utility model solves its technical problem employing is: be made up of intelligent electric energy detection module, intelligent controller, adjustable condenser group and induction reactance converter, in one end access electrical network after described adjustable condenser group and the parallel connection of induction reactance converter, other end ground connection; Induction reactance converter is made up of variable reactor and electronic power converter; Intelligent controller is connected with the thyristor circuit in induction reactance converter with intelligent electric energy detection module respectively by data wire.
Described tunable capacitor group can be formed by the series circuit of organizing fast acting fuse, capacitor switching contactor and capacitor more after parallel connection.
Described tunable capacitor group, it can form and send idle loop to electric power system with the series circuit of capacitor switching contactor, I/O interface circuit.
Described induction reactance converter is connected to the grid after can being connected with the end of incoming cables of the first side winding of variable reactor by capacitor switching contactor, the leading-out terminal ground connection of first side winding; The secondary side winding of variable reactor is connected with electronic power converter.
Described electronic power converter can be made up of three-phase anti-parallel thyristor, is connected on respectively the two ends of variable reactor secondary winding, and by intelligent controller control trigger board triggering and conducting.
Described intelligent controller can adopt PLC control system.This PLC control system can be by the PLC controller being connected with power supply and the electrical energy parameter acquisition module, touch-screen, I/O interface circuit, the trigger board the electric circuit constitute that are connected with PLC controller respectively with data wire.
The utility model compared with prior art has advantages of following:
(1) power electronics emotional resistance transformer configuration, adopts high and low pressure isolation method, has reduced power electric component voltage withstand class and requirement and environment for use;
(2) intelligent sensor and controller reactive power and the reactive current to composite electric load carried out real-time analysis and extraction;
(3) intelligent controller regulates reactive-load compensator parameter, realizes the dynamic reactive of distribution system or electrical load is compensated fast;
(4) adjustable condenser group and induction reactance converter cooperatively interact, and meet send to electrical network idle adjustable continuously.
In a word, the quick compensator of dynamic reactive of the composite electric load that the utility model Gong provides, has reduced power electric component voltage withstand class and requirement and environment for use.By dynamic reactive real-time current detection method, realize reactive power in different load situation and real-time analysis and the extraction of reactive current.Finally, for the situation of load variations (sudden change of inductive load, the sudden change of capacitive load, inductive load suddenly change and sport inductive load to capacitive load and capacitive load), can seek optimum idle quick compensation Based Intelligent Control.
Brief description of the drawings
Fig. 1 is the schematic diagram of the quick bucking-out system of dynamic reactive of the utility model composite electric load.
In Fig. 1: 1. high voltage isolator; 2. primary cut-out; 3. voltage current transformer; 4. intelligent electric energy detection module; 5. adjustable condenser group; 6. induction reactance converter; 7. intelligent controller; 8. fast acting fuse; 9. capacitor switching contactor; 10. capacitor; 11. variable reactors; 12. electronic power converters.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
The quick bucking-out system of dynamic reactive of the composite electric load that the utility model provides, its structure as shown in Figure 1, formed by intelligent electric energy detection module 4, intelligent controller 7, adjustable condenser group 5 and induction reactance converter 6, wherein: tunable capacitor group 5 is formed after parallel connection by the series circuit of organizing fast acting fuse 8, capacitor switching contactor 9 and capacitor 10 more, induction reactance converter 6 is made up of variable reactor 11 and electronic power converter 12.After adjustable condenser group 5 and induction reactance converter 6 is in parallel in access electrical network, intelligent controller 7 is connected with thyristor circuit in intelligent electric energy detection module 4 and induction reactance converter 6 respectively by data wire.
Described tunable capacitor group 5, the series circuit of itself and capacitor switching contactor 9, I/O interface circuit form and send idle loop to electric power system.
Described induction reactance converter 6 is connected to the grid after being connected with the end of incoming cables of the first side winding of variable reactor 11 by capacitor switching contactor 9, the leading-out terminal ground connection of first side winding; The secondary side winding of variable reactor 11 is connected with electronic power converter 12.
Described electronic power converter 12 is made up of three-phase anti-parallel thyristor, is connected on respectively the two ends of variable reactor secondary winding, and controls trigger board triggering and conducting by intelligent controller 7.
Described intelligent controller 7 adopts PLC control system.
Described PLC control system is by the PLC controller being connected with power supply and the electrical energy parameter acquisition module, touch-screen, I/O interface circuit, the trigger board the electric circuit constitute that are connected with PLC controller respectively with data wire.
The utility model is controlled electronic power converter 12 by intelligent controller 7, changes electric current and the impedance of variable reactor 11 secondary winding, thereby changes electric current and the impedance of a winding of variable reactor 11.In the time that input voltage is constant, realize the change of variable reactor 11 admittance, just can change fundamental current, thereby cause the variation of variable reactor 11 absorbing reactive powers.When target power factor left and right is controlled and compensated to adjustable condenser group 5 by intelligent controller 7, induction reactance converter 6 coordinates adjustable condenser group 5, and energy smooth adjustment reactive power, realizes dynamic passive compensation.
Specific works process of the present utility model is as follows:
1. closing by hand QS(high voltage isolator 1), QF(primary cut-out 2), the intelligent electric energy detection module 4 in circuit and intelligent controller 7 access after power supply electricly, intelligent controller 7 is started working;
2. pass through intelligent controller 7 by contactor KM1 closure, now adjustable condenser group 5 accesses electrical network, the current/voltage that intelligence electric energy detection module 4 extracts by voltage current transformer 3 is through converting power factor and active power to, the adhesive of the KM11～KM1n of intelligent controller 7 control capacitance contactors 9 selects suitable several group capacitors 10 to drop into electrical network, the actual capacitance that regulates access electric power system, makes power factor of electric network reach target power factor.
3. in the time of overcompensation, by intelligent controller 7 output pulse signals, control the primary current that electronic power converter 12 regulates variable reactor 11, thereby make induction reactance converter 6 absorbing reactive powers adjustable, thereby play power factor of electric network fine setting and the real-time effect that detects and regulate the reactive power of sending;
4. by the variation of voltage current transformer 3 and intelligent electric energy detection module 4 real-time detection of grid power factors, then realize " start operation, detected transmission, analytical calculation, send idle and absorb idle " function by intelligent controller 7;
5. after composite electric loaded work piece is in stable condition, the power factor of electrical network reaches target zone, and the composite electric load dynamic reactive quick compensator that the utility model adopts detects and steady-working state in real time, can send stable reactive power.Having realized composite electric load dynamic reactive by above step 1-step 4 compensates fast.
Control method for coordinating between above-mentioned steps 1-step 5 is realized by PLC control system, its method is: by data communication between the connected PLC controller of power supply and electrical energy parameter acquisition module, the transmission of control signal and data-signal between touch-screen and PLC controller, PLC controller is by the closure of I/O interface circuit control contactor, and PLC controller is controlled trigger board by analog output module.
The quick bucking-out system of dynamic reactive of the utility model composite electric load, it has reduced power electric component voltage withstand class and requirement and environment for use in conjunction with variable reactor technology.By dynamic reactive real-time current detection and intelligent compensation, realize reactive power in different load situation and real-time analysis and the extraction of reactive current, realize composite electric load dynamic reactive is compensated fast.This system can be in the Quick reactive-load compensation of high pressure composite electric load that comprises metallurgy, building materials or petrochemical industry field application.
Claims (7)
1. the quick bucking-out system of the dynamic reactive of composite electric load, it is characterized in that being formed by intelligent electric energy detection module (4), intelligent controller (7), adjustable condenser group (5) and induction reactance converter (6), in one end access electrical network after described adjustable condenser group (5) and induction reactance converter (6) parallel connection, other end ground connection; Induction reactance converter (6) is made up of variable reactor (11) and electronic power converter (12); Intelligent controller (7) is connected with the thyristor circuit in induction reactance converter (6) with intelligent electric energy detection module (4) respectively by data wire.
2. the quick bucking-out system of the dynamic reactive of composite electric load according to claim 1, is characterized in that described tunable capacitor group (5) is formed after parallel connection by the series circuit of organizing fast acting fuse (8), capacitor switching contactor (9) and capacitor (10) more.
3. the quick bucking-out system of the dynamic reactive of composite electric load according to claim 2, it is characterized in that: described tunable capacitor group (5), the series circuit of itself and capacitor switching contactor (9), I/O interface circuit form and send idle loop to electric power system.
4. the quick bucking-out system of the dynamic reactive of composite electric load according to claim 1, it is characterized in that: described induction reactance converter (6) is connected to the grid after being connected with the end of incoming cables of the first side winding of variable reactor (11) by capacitor switching contactor (9), the leading-out terminal ground connection of first side winding; The secondary side winding of variable reactor (11) is connected with electronic power converter (12).
5. the quick bucking-out system of the dynamic reactive of composite electric load according to claim 1, it is characterized in that: described electronic power converter (12) is made up of three-phase anti-parallel thyristor, be connected on respectively the two ends of variable reactor secondary winding, and control trigger board triggering and conducting by intelligent controller (7).
6. the quick bucking-out system of the dynamic reactive of composite electric load according to claim 1, is characterized in that: described intelligent controller (7) adopts PLC control system.
7. the quick bucking-out system of the dynamic reactive of composite electric load according to claim 6, is characterized in that: described PLC control system is by the PLC controller being connected with power supply and the electrical energy parameter acquisition module, touch-screen, I/O interface circuit, the trigger board the electric circuit constitute that are connected with PLC controller respectively with data wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420115065.6U CN203774797U (en) | 2014-03-14 | 2014-03-14 | Dynamic reactive rapid compensation system for composite electric-power load |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420115065.6U CN203774797U (en) | 2014-03-14 | 2014-03-14 | Dynamic reactive rapid compensation system for composite electric-power load |
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| CN203774797U true CN203774797U (en) | 2014-08-13 |
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| CN201420115065.6U Expired - Fee Related CN203774797U (en) | 2014-03-14 | 2014-03-14 | Dynamic reactive rapid compensation system for composite electric-power load |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262110A (en) * | 2015-11-02 | 2016-01-20 | 国网河南方城县供电公司 | Dynamic reactive compensation system |
| CN105810061A (en) * | 2016-04-15 | 2016-07-27 | 国网江苏省电力公司盐城供电公司 | Digital simulation reactive compensation controller |
-
2014
- 2014-03-14 CN CN201420115065.6U patent/CN203774797U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262110A (en) * | 2015-11-02 | 2016-01-20 | 国网河南方城县供电公司 | Dynamic reactive compensation system |
| CN105810061A (en) * | 2016-04-15 | 2016-07-27 | 国网江苏省电力公司盐城供电公司 | Digital simulation reactive compensation controller |
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| 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 |
Granted publication date: 20140813 Termination date: 20150314 |
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| EXPY | Termination of patent right or utility model |