CN204794110U

CN204794110U - Reactive power compensator

Info

Publication number: CN204794110U
Application number: CN201520543433.1U
Authority: CN
Inventors: 吕立云
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-07-25
Filing date: 2015-07-25
Publication date: 2015-11-18
Anticipated expiration: 2025-07-25

Abstract

The utility model discloses a reactive power compensator, including A looks current sensor CT1, a looks voltage transformer PT 1, B looks current sensor CT2, B looks voltage transformer PT 2, C looks current sensor CT3, C looks voltage transformer PT 3, static var compensator SVC1, static var compensator SVC2 and capacitance compensation ware C4, current sensor CT1, CT2, CT3 and voltage transformer PT 1, PT2, PT3 are connected with MCU's input respectively, static var compensator SVC1 passes through vacuum contactor K1 and is connected with three -phase grid with fusing FU1, static var compensator SVC2 passes through vacuum contactor K2 and is connected with three -phase grid with fusing FU2, the capacitance compensation ware C4 comprise three star connection's electric capacity. The utility model discloses practice thrift the electric energy.

Description

A kind of reactive power compensator

Technical field

The utility model belongs to power transmission and distribution field, particularly a kind of reactive power compensator.

Background technology

Along with the develop rapidly of national economy, power consumption also constantly increases thereupon.A large amount of uses of industrial expansion, the opening of track traffic, resident's household electrical appliance, make in electrical network, to there is a large amount of inductive loads, not only consume a large amount of active power, also consumes a large amount of reactive powers simultaneously, so just cause the deficiency of system reactive power.Relative to developed country, China's most urban and rural power grids power factor is on the low side.Therefore improve the power factor of electrical network, improve quality of voltage, improve the efficiency of transmission of electric energy, just become an important topic of electric power system.In order to balance var, improving power factor, need design reactive-load compensation equipment, accomplish with load and variation in voltage, timely control capacitor drops into or excision, prevents reactive power releasing, thus saves energy, improve running quality.

Utility model content

For the defect of prior art, the utility model provides a kind of reactive power compensator.

A kind of reactive power compensator, comprise A phase current transducer CT1, A phase voltage instrument transformer PT1, B phase current transducer CT2, B phase voltage instrument transformer PT2, C phase current transducer CT3, C phase voltage instrument transformer PT3, Static Var Compensator SVC1, Static Var Compensator SVC2 and capacitive compensator C4, described current sensor CT1, CT2, CT3 and voltage transformer pt 1, PT2, PT3 is connected with the input of MCU respectively, described Static Var Compensator SVC1 is connected with three phase network with fusing FU1 by vacuum contactor K1, described Static Var Compensator SVC2 is connected with three phase network with fusing FU2 by vacuum contactor K2, described capacitive compensator C4 is made up of the electric capacity of three Y-connections, described capacitive compensator C4 is connected with three phase network, the output of described MCU respectively with described vacuum contactor K1, be connected with the coil of K2, described Static Var Compensator SVC1 or SVC2 comprises electric capacity C1, C2 and C3 that three triangles connect, and leg-of-mutton three summits a, b, c are connected with C respectively by the A phase of inductance L 1, L2 with L3 and three phase network, B phase.

Optionally, described MCU is also connected with I/O expansion module, display circuit and CAN module by bus, and described I/O expansion module is connected with keyboard.

The beneficial effects of the utility model are: can show power factor of electric network value in real time by display circuit, meanwhile, and can also the operating state of display controller and the switching situation of Capacitor banks; Can by different compensation requirements setting and adjustment running parameter by keyboard; Adopt the switching mode that fixed capacitor and SVC combine, in order to avoid Capacitor banks long-time running, temperature rise is too high.Basis is novel in a word can effectively compensate power system reactive power, saves energy.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model reactive power compensator;

Fig. 2 is the structural representation of the utility model Static Var Compensator.

Embodiment

For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail embodiment of the present utility model below in conjunction with accompanying drawing, make above-mentioned and other object of the present utility model, Characteristics and advantages will be more clear.Reference numeral identical in whole accompanying drawing indicates identical part.Deliberately do not draw accompanying drawing in proportion, focus on purport of the present utility model is shown.

As shown in Figure 1, reactive power compensator of the present utility model comprises A phase current transducer CT1, A phase voltage instrument transformer PT1, B phase current transducer CT2, B phase voltage instrument transformer PT2, C phase current transducer CT3, C phase voltage instrument transformer PT3, Static Var Compensator SVC1, Static Var Compensator SVC2 and capacitive compensator C4, described current sensor CT1, CT2, CT3, with voltage transformer pt 1, PT2, PT3 respectively with MCU(main control unit) input be connected, described Static Var Compensator SVC1 is connected with three phase network with fusing FU1 by vacuum contactor K1, described Static Var Compensator SVC2 is connected with three phase network with fusing FU2 by vacuum contactor K2, described capacitive compensator C4 is made up of the electric capacity of three Y-connections, described capacitive compensator C4 is connected with three phase network, the output of described MCU respectively with described vacuum contactor K1, be connected with the coil of K2.Further, described MCU is also connected with I/O expansion module, display circuit and CAN module by bus, and described I/O expansion module is connected with keyboard.

Refer to Fig. 2, described Static Var Compensator SVC1 or SVC2 comprises electric capacity C1, C2 and C3 that three triangles connect, and leg-of-mutton three summits a, b, c are connected with C respectively by the A phase of inductance L 1, L2 with L3 and three phase network, B phase.

1 high-voltage capacitor C4 is housed in the utility model, and capacitor C4 is used for carrying out basic reactive power compensation, SVC1 and SVC2 is controlled by controller MCU, and voltage transformer provides voltage signal, and Current Transmit 1, CT2, CT3 gather phase current.MCU carries out analytical calculation according to the phase current collected and phase voltage, through judging lagging reactive power and the power factor of the system that obtains, then exports control signal, controls vacuum contactor and closes and cut-off.Display circuit, for showing the switching situation of current power factor and SVC1, SVC2, can arrange various parameter by keyboard, and CAN module is used for realizing communication with remote supervisory and control(ling) equipment.

Set forth a lot of detail in the above description so that fully understand the utility model.But above description is only preferred embodiment of the present utility model, the utility model can be much different from alternate manner described here to implement, and therefore the utility model is not by the disclosed concrete restriction implemented above.Any those skilled in the art are not departing under technical solutions of the utility model ambit simultaneously, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solutions of the utility model, or be revised as the Equivalent embodiments of equivalent variations.Every content not departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solutions of the utility model protection.

Claims

1. a reactive power compensator, it is characterized in that comprising A phase current transducer CT1, A phase voltage instrument transformer PT1, B phase current transducer CT2, B phase voltage instrument transformer PT2, C phase current transducer CT3, C phase voltage instrument transformer PT3, Static Var Compensator SVC1, Static Var Compensator SVC2 and capacitive compensator C4, described current sensor CT1, CT2, CT3 and voltage transformer pt 1, PT2, PT3 is connected with the input of MCU respectively, described Static Var Compensator SVC1 is connected with three phase network with fusing FU1 by vacuum contactor K1, described Static Var Compensator SVC2 is connected with three phase network with fusing FU2 by vacuum contactor K2, described capacitive compensator C4 is made up of the electric capacity of three Y-connections, described capacitive compensator C4 is connected with three phase network, the output of described MCU respectively with described vacuum contactor K1, be connected with the coil of K2, described Static Var Compensator SVC1 or SVC2 comprises electric capacity C1, C2 and C3 that three triangles connect, and leg-of-mutton three summits a, b, c are connected with C respectively by the A phase of inductance L 1, L2 with L3 and three phase network, B phase.

2. reactive power compensator according to claim 1, is characterized in that described MCU is also connected with I/O expansion module, display circuit and CAN module by bus, and described I/O expansion module is connected with keyboard.