CN202856376U - Intelligent low-voltage power distribution network reactive power compensation device - Google Patents
Intelligent low-voltage power distribution network reactive power compensation device Download PDFInfo
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- CN202856376U CN202856376U CN 201220573219 CN201220573219U CN202856376U CN 202856376 U CN202856376 U CN 202856376U CN 201220573219 CN201220573219 CN 201220573219 CN 201220573219 U CN201220573219 U CN 201220573219U CN 202856376 U CN202856376 U CN 202856376U
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- relay
- reactive power
- distribution network
- thyristor
- 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
- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses an intelligent low-voltage power distribution network reactive power compensation device. The structure of the device comprises a monitoring unit, a relay, a thyristor, a power distribution network and a reactive power compensation unit. The monitoring unit is in electrical connection with the power distribution network for monitoring the state of the power distribution network. The relay is in electrical connection with the output end of the monitoring unit, the relay is in electrical connection with the output end of the monitoring unit, and the relay is connected in parallel with the thyristor. The output end of the thyristor is connected with the normally open contact on the relay and connected with the reactive power compensation unit. The device of the utility model has the following advantages: the device is used to perform reactive power compensation according to the condition of the current and the condition of the voltage on a real time basis, so compared with the prior art, in the process of reactive power compensation, the advantage of less electric energy loss can be realized. Meanwhile, no heat dissipation device needs to be arranged, so the cost can be reduced, and the size can be reduced. The capacitance-variable geometric switching mode or the arithmetic switching mode is adopted, so the number of capacitors can be increased without changing the capacitance of the capacitors, so that the compensation is more reasonable.
Description
Technical field
The utility model relates to low-voltage reactive compensator capable, adopt three-phase total compensation to phase splitting compensation, to reach more preferably compensation effect; The operation recording instrument of intelligent automatic compensating controller and distribution transformer combines; Adopt the casing of stainless steel or aviation aluminium sheet, have winter protection, sun-proof, sealing, moistureproof, antirust characteristics; Select dry type or fill the self-healing type parallel condenser of SF6, with high operational reliability, prolonged service life.
Background technology
In the unbalanced situation of common three-phase load, there are the following problems for traditional low-pressure reactive compensation equipment:
A: only gather single-phase signal, three-phase total compensation occurred mending or owed and mended;
B: the A.C. contactor that the switching control switch adopts, response speed is slow, have that switching shoves in the switching process, shorten useful life;
C: controlled quentity controlled variable adopts voltage, reactive current, power factor more, not consider and the equilibrium relation of voltage and the idle work optimization in zone.
Summary of the invention
The utility model proposes a kind of Intelligent low-voltage network reactive compensator, its purpose is intended to overcome the defective that prior art exists, and has an electric energy loss few, can reduce production costs and reduce this low-voltage reactive power compensation device volume simultaneously.Satisfy the requirement of automation power distribution network, realize measurement, monitoring, statistics, storage, the printing of parameter.
Technical solution of the present utility model: its structure comprises monitoring means, relay, thyristor, distribution network, reactive power compensation unit, wherein monitoring means is electrically connected with distribution network, relay is electrically connected with the output of described monitoring means, relay is electrically connected with the output of monitoring means, relay is in parallel with thyristor, wherein the output of thyristor is connected with normally open contact on the relay, and is connected with the reactive power compensation unit.
Advantage of the present utility model: because this device carries out reactive power compensation in real time according to the current/voltage situation, compared with prior art, when reactive power compensation, electric energy loss is less; Simultaneously do not need to arrange heat dissipation equipment, therefore can reduce cost, reduce volume.And adopted and do not waited capacity geometric ratio or equal difference switching mode, can increase the electric capacity number in the situation that do not change condenser capacity, so that compensation is more reasonable.And have multi-protective function, and comprise overvoltage protection, under-voltage protection, lightning protection, open-phase protection, temperature protection, basically can satisfy the technological requirement of various occasions.
Description of drawings
Accompanying drawing 1 is the utility model low-voltage reactive power compensation device embodiment 1 theory diagram.
Accompanying drawing 2 is the utility model low-voltage reactive power compensation device embodiment 2 concrete schematic diagrams.
Among the figure 1 is monitoring means, the 2nd, relay, the 3rd, thyristor, the 4th, distribution network, the 5th, reactive power compensation unit, the 11st, controller, the 12nd, Acquisition Circuit.
Embodiment
Contrast accompanying drawing 1, its structure comprises: to reactive power compensation unit 5, monitoring means 1, thyristor 3 and relay 2 that distribution network 4 compensates, wherein, monitoring means 1 is electrically connected with distribution network 4, be used for these distribution network 4 states of monitoring, and export corresponding pulse control signal; Relay 2 is electrically connected with the output of monitoring means 1, and in parallel with the input/output terminal of described thyristor 3, and this relay 2 is according to the pulse control signal execution action; The output of thyristor 3 is connected with normally open contact on the described relay 2, and is connected with described reactive power compensation unit 5, is used for the control reactive power compensation and opens or close.
Specifically, the current/voltage that is gathered on the distribution network 4 by the Acquisition Circuit 12 in the described monitoring means 1.When described distribution network 4 current/voltages during less than the preset value that is preset in the described controller 11, the pulse control signal of described controller 11 output 1S, this moment, this pulse control signal can be controlled described thyristor 3 conductings, and dropping into should electric capacitor work; Simultaneously go back output switch amount signal by described controller 11, this switching value signal makes the electromechanical relay coil electricity, and the normally open contact of described electromechanical relay is closed, keeps the normal operation of respective electrical container.Behind 1S, described thyristor 3 cut-offs.
When described distribution network 4 current/voltages during less than the preset value that is preset in the described controller 11, the pulse control signal of described controller 11 output 1S, this moment, this control signal can be controlled described thyristor 3 conductings, kept the respective electrical container to work on; By described controller 11 output switch amount signals, this switching value signal makes the electromechanical relay coil blackout simultaneously, and the normally open contact of described electromechanical relay disconnects.Behind 1S, described thyristor 3 ends when current over-zero and quits work, and therefore can make reactive power compensation unit 5 drop in real time reactive power compensation or stop reactive power compensation according to monitoring means 1 monitoring current voltage.Because this device according to circumstances carries out reactive power compensation in real time, compared with prior art, during reactive power compensation, electric energy loss is less; Simultaneously do not need to arrange heat dissipation equipment, therefore can reduce cost, reduce volume.
In an embodiment, the control loop power supply of thyristor 3 and relay 2 is DC power supply, and relay 2 is electromechanical relay.Controller is the staged idle compensating control, described staged idle compensating control is multichannel output control signal, the power capacitor of first via output control C/4, the power capacitor of the second tunnel output control C/2, other outputs such as are controlled to be at the power capacitor C of capacity, and the capacity arrangement of power capacitor is stepped, according to the size of System Reactive Power load, determine the way of control output, to improve compensation precision.
During implementation, three-phase power line and service entrance switch input link, ground connection behind output one tunnel connection lightning arrester of service entrance switch, connect with current transformer and contactor in another road, then wherein an intermediate point that passes through mutually fast acting fuse and solid-state relay input joins, after two-phase forms series connection through fast acting fuse, reactor in addition, be attached to respectively again other two input points of solid-state relay, wherein contactor is subjected to start, stop two button controls, finishes the power supply to internal bus; The solid-state relay output links with three lead-out wires of opening-closing capacitor bank respectively; Circuit indicator is connected across between any one output of solid-state relay and the ground wire N; Voltmeter is directly parallel in the circuit through fuse; Ammeter is connected with the current transformer secondary coil respectively and is formed the closed-loop path, and ground connection; The voltage signal of reactive power controller input is taken from three-phase voltage, and current signal is got the A phase current, and its output directly links with the input of controller, and the direct and trigger control unit of the output of controller links; Trigger control unit is then controlled the operating state of solid-state relay, finishes the switching to capacitor.
Technical characteristic
1. input voltage: 400V; Rated frequency: 50Hz; Input current: 0～5A.
2. compensation capacity: the separate unit capacity of product is (unit: kilovar) at present: 5～960KVAR.(being box below 150 kilovars, is the screen formula more than 150 kilovars, can configure according to customer requirements.）
3. compensation way: a. mends formula altogether; B. minute benefit is mended convolution together; C. divide benefit.
4. control capacitor group number: 2～16 groups (according to customer requirements setting).
5. certainty of measurement: voltage, electric current are 0.5%; Active power, reactive power, power factor (PF) are 1%; Active electrical degree, idle electric degree are 2%.
6. shell protection grade: 1P3L3
The capacity of reactive power compensator is selected:
The capacity of compensation arrangement remembers with kvar, and compensation rate multiply by total electricity consumption by the difference of the impedance tangent of an angle before and after the compensation and determines, i.e. compensation capacity Qc=P
Kvar
The active power (KW) that the P-power supply is supplied with to load in the formula;
Claims (2)
1. Intelligent low-voltage network reactive compensator, it is characterized in that structure comprises monitoring means, relay, thyristor, distribution network, reactive power compensation unit, wherein monitoring means is electrically connected with distribution network, relay is electrically connected with the output of described monitoring means, relay is electrically connected with the output of monitoring means, relay is in parallel with thyristor, and wherein the output of thyristor is connected with normally open contact on the relay, and is connected with the reactive power compensation unit.
2. Intelligent low-voltage network reactive compensator according to claim 1 is characterized in that described monitoring means comprises: controller and the collecting unit that is electrically connected with this controller; Collecting unit is connected with distribution network, and the output of controller also is electrically connected with thyristor and relay respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220573219 CN202856376U (en) | 2012-11-02 | 2012-11-02 | Intelligent low-voltage power distribution network reactive power compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220573219 CN202856376U (en) | 2012-11-02 | 2012-11-02 | Intelligent low-voltage power distribution network reactive power compensation device |
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| Publication Number | Publication Date |
|---|---|
| CN202856376U true CN202856376U (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220573219 Expired - Lifetime CN202856376U (en) | 2012-11-02 | 2012-11-02 | Intelligent low-voltage power distribution network reactive power compensation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130033A (en) * | 2016-07-18 | 2016-11-16 | 安徽得润电气技术有限公司 | A kind of low-voltage reactive power compensation device detecting current/voltage real-Time Compensation |
-
2012
- 2012-11-02 CN CN 201220573219 patent/CN202856376U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130033A (en) * | 2016-07-18 | 2016-11-16 | 安徽得润电气技术有限公司 | A kind of low-voltage reactive power compensation device detecting current/voltage real-Time Compensation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |
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| CX01 | Expiry of patent term |