CN101625924B

CN101625924B - Voltage transformer simulation load box

Info

Publication number: CN101625924B
Application number: CN200910074386XA
Authority: CN
Inventors: 陈卓娅; 赵屹涛; 卢兴远; 赵修民; 宋伟; 韩海洲; 李清; 张保国; 赵玉富; 王进红; 潘辉
Original assignee: Shanxi Electromechanical Design And Research Institute; Electric Power Research Institute of State Grid Henan Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Henan Electric Power Co Ltd; Shanxi Institute of Mechanical and Electrical Engineering
Priority date: 2009-05-14
Filing date: 2009-05-14
Publication date: 2012-05-02
Anticipated expiration: 2029-05-14
Also published as: CN101625924A

Abstract

The invention relates to a voltage transformer simulation load box, which is a device for inputting secondary voltage of a voltage transformer, outputting a phase-adjustable current source through a micro-electromechanical sub-circuit, and converting the current source into required secondary current through the transformer, wherein the size and the phase of the output secondary current are controlled by a microcomputer, and the voltage transformer with the secondary voltage of 100, 110, 120, 150, 200V, 100/V3, 110/V3, 120/V3, 150/V3, 200/V3, 220/V3V can obtain any simulation load with the power factor of 1-100 VA to 0-1.00.

Description

Voltage transformer simulation load box

Technical field

The invention belongs to transformer simulation load box, be specifically related to a kind of voltage transformer simulation load box.

Background technology

When measuring instrument transformer, must rated voltage difference, load admittance size and power factor voltages having different magnitude Burden box have been produced specially at the load that is added regulation by the secondary of examination instrument transformer for this reason.Although this voltage Burden box is arranged at present; FYF1 type emulation voltage Burden box like Shanxi Institute of Mechanical & Electrical Engineering's production; This voltage Burden box is on instrument transformer, to be connected with resistance, and it can only survey 0.8 and 1 power factor, if survey the power factor of other numerical value; Also need to make the voltage Burden box separately, can not satisfy the needs of surveying other special power factor.

Summary of the invention

Technical problem to be solved by this invention provides a kind of voltage transformer simulation load box, and it can make, and secondary voltage is 100,110,120,150,200, to obtain 1～100VA power factor be any artificial load between 0～1.00 to the voltage transformer of 220V, 100/ √, 3,110/ √, 3,120/ √, 3,150/ √, 3,200/ √, 3,220/ √ 3V.

Technical scheme of the present invention: a kind of voltage transformer simulation load box; It is made up of voltage transformer Y1, self coupling voltage transformer Y2, current transformer Y3, self coupling current transformer Y4, micro electronmechanical circuitry phase QL, relay and the ramp of drifting; Ramp a, x connect a, the x end of voltage transformer Y1 power supply winding respectively; The H0 end of the b0 termination self coupling voltage transformer Y2 of the output winding of voltage transformer Y1; And connect the input P2 of the micro electronmechanical circuitry phase QL that drifts; The tap b1-b6 of output winding is connected with the H1 end of self coupling voltage transformer Y2 through relay J a1-Ja6; The H1 of self coupling voltage transformer Y2 or H2 end link to each other with the input P1 of the micro electronmechanical circuitry phase QL that drifts through relay J g, and the output Q1 of the micro electronmechanical circuitry phase QL that drifts is connected with the binary system of current transformer Y3 input winding D8 end, and another output Q2 is connected with d0 or the D0 end of current transformer Y3 through relay J 0; Binary system input winding d0D0, d1D1 are to d9D9 totally 10 windings; According to putting in order, D0 through relay J 1 is connected with d1 or D1, D1 passes through relay J 2 and is connected with d2 or D2, pass through relay J 9 up to D8 and be connected with d9 or D9; The output winding C0 end of current transformer Y3 links to each other with the E0 end of self coupling current transformer Y4 and is connected ramp D; The tap C1-C6 of the output winding of current transformer Y3 is connected to relay J r through relay J a1-Ja6, and is connected with E3 or the E1 end of self coupling current transformer Y4 through relay J r, and the E3 of self coupling current transformer Y4 or E2 end are connected to ramp Y through relay J g.

The present invention compared with prior art has following beneficial effect: the present invention can make that secondary voltage is 100,110,120,150,200, the voltage transformer of 220V, 100/ √, 3,110/ √, 3,120/ √, 3,150/ √, 3,200/ √, 3,220/ √ 3V obtains any artificial load of 1～100VA power factor 0～1.00.

Description of drawings

Fig. 1 is a schematic circuit of the present invention.

Embodiment

A kind of voltage transformer simulation load box; It is made up of voltage transformer Y1, self coupling voltage transformer Y2, current transformer Y3, self coupling current transformer Y4, micro electronmechanical circuitry phase QL, relay and the ramp of drifting; Ramp a, x connect a, the x end of voltage transformer Y1 power supply winding respectively; The H0 end of the b0 termination self coupling voltage transformer Y2 of the output winding of voltage transformer Y1; And connect the input P2 of the micro electronmechanical circuitry phase QL that drifts; The tap b1-b6 of output winding is connected with the H1 end of self coupling voltage transformer Y2 through relay J a1-Ja6; The H1 of self coupling voltage transformer Y2 or H2 end link to each other with the input P1 of the micro electronmechanical circuitry phase QL that drifts through relay J g, and the output Q1 of the micro electronmechanical circuitry phase QL that drifts is connected with the binary system of current transformer Y3 input winding D8 end, and another output Q2 is connected with d0 or the D0 end of current transformer Y3 through relay J 0; Binary system input winding d0D0, d1D1 are to d9D9 totally 10 windings; According to putting in order, D0 through relay J 1 is connected with d1 or D1, D1 passes through relay J 2 and is connected with d2 or D2, pass through relay J 9 up to D8 and be connected with d9 or D9; The output winding C0 end of current transformer Y3 links to each other with the E0 end of self coupling current transformer Y4 and is connected ramp D; The tap C1-C6 of the output winding of current transformer Y3 is connected to relay J r through relay J a1-Ja6, and is connected with E3 or the E1 end of self coupling current transformer Y4 through relay J r, and the E3 of self coupling current transformer Y4 or E2 end are connected to ramp Y through relay J g.

Operation principle:

Input voltage instrument transformer secondary voltage; Through microcomputer electronic circuit output adjustable phase current source; Convert the device of required secondary current into through instrument transformer; And the secondary current size of output and phase place be by system controlled by computer, can make that secondary voltage is 100,110,120,150,200, the voltage transformer of 220V, 100/ √, 3,110/ √, 3,120/ √, 3,150/ √, 3,200/ √, 3,220/ √ 3V obtains any artificial load of 1～100VA power factor 0～1.00.

The micro electronmechanical circuitry phase QL that drifts is produced by Shanxi Institute of Mechanical & Electrical Engineering.

Claims

1. A voltage transformer simulation load box, which consists of a voltage transformer (Y1), an auto-coupling voltage transformer (Y2), a current transformer (Y3), an auto-coupling current transformer (Y4), and a microcomputer current phase-shifting circuit (QL), a relay and a terminal button, which is characterized in that the terminal buttons a and x are respectively connected to the a and x terminals of the voltage transformer (Y1) power supply winding, and the b0 terminal of the output winding of the voltage transformer (Y1) is connected to the self The H0 terminal of the coupling voltage transformer (Y2) is connected to the input terminal P2 of the microcomputer current phase-shifting circuit (QL), and the taps b1-b6 of the output winding are connected to the H1 terminal of the auto-coupling voltage transformer (Y2) through the relays Ja1-Ja6 Connection, the H1 or H2 end of the auto-coupling voltage transformer (Y2) is connected with the input terminal P1 of the microcomputer current phase-shifting circuit (QL) through the relay Jg, and the output terminal Q1 of the microcomputer current phase-shifting circuit (QL) is connected with the current transformer ( The binary input winding D8 of Y3) is connected to the D8 terminal, and the other output terminal Q2 is connected to the d0 or D0 terminal of the current transformer (Y3) through the relay J0. The binary input windings d0D0, d1D1 to d9D9 have a total of 10 windings. According to the order of arrangement, D0 Connect with d1 or D1 through relay J1, D1 connect with d2 or D2 through relay J2, until D8 connects with d9 or D9 through relay J9, the output winding C0 terminal of current transformer (Y3) and auto-coupling current transformer (Y4) The E0 terminal of the current transformer (Y3) is connected to the terminal button D, and the taps C1-C6 of the output winding of the current transformer (Y3) are connected to the relay Jr through the relay Ja1-Ja6, and are connected to the E3 of the auto-coupling current transformer (Y4) through the relay Jr. Or E1 end connection, the E3 or E2 end of the auto-coupling current transformer (Y4) is connected to the terminal button Y through the relay Jg.