CN107966613A - The special phase changer of direct-current resistance tester for transformer and phase change method - Google Patents

The special phase changer of direct-current resistance tester for transformer and phase change method Download PDF

Info

Publication number
CN107966613A
CN107966613A CN201711430965.4A CN201711430965A CN107966613A CN 107966613 A CN107966613 A CN 107966613A CN 201711430965 A CN201711430965 A CN 201711430965A CN 107966613 A CN107966613 A CN 107966613A
Authority
CN
China
Prior art keywords
relay
resistance
connection
transformer
power supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201711430965.4A
Other languages
Chinese (zh)
Other versions
CN107966613B (en
Inventor
付玉婷
田忠
张昕
吴卫
黄家铭
谢祥伟
曹礼南
戴迪
宁晗
方苇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Maintenance Branch of State Grid Hubei Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Maintenance Branch of State Grid Hubei Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Maintenance Branch of State Grid Hubei Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201711430965.4A priority Critical patent/CN107966613B/en
Publication of CN107966613A publication Critical patent/CN107966613A/en
Application granted granted Critical
Publication of CN107966613B publication Critical patent/CN107966613B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00

Abstract

The present invention relates to a kind of special phase changer of direct-current resistance tester for transformer, it is characterised in that:It includes MOS1 pipes~MOS6 pipes, resistance R1~resistance R6, resistance R1'~resistance R6', capacitance C1~capacitance C6, relay A1~relay A6, DC power supply DC1 and DC power supply DC2.The present invention can a key replace test connection, while discharging preceding test phase winding, and charge to existing test phase winding.Compared with manually replacing test connection, operated using professional phase changer, both saved the time of each electric discharge and replacement test connection, also reduce the workload of testing crew.

Description

The special phase changer of direct-current resistance tester for transformer and phase change method
Technical field
The present invention relates to high voltage electric equipment technical field, and in particular to a kind of direct-current resistance tester for transformer is special to be changed Phase device and phase change method.
Background technology
In power transmission and transformation equipment state overhauling testing regulations, DC Resistance Test of Transformer is that state's network planning determines power transformer Essential one in experiment, by the research and development to instrument for measuring DC resistance for many years, now mainly have three-phase tester and Single-phase two kinds of tester.The former is served only for the experiment of three-phase transformer direct current resistance m easurem ent, and the latter can be used to single-phase transformer D.C. resistance is tested, it can also be used to and three-phase transformer D.C. resistance is tested, and small volume is easy to carry, therefore in electrical test In obtained wider application.
But if by single-phase tester for three-phase transformer direct current resistance m easurem ent test, testing crew can only gradually to A, B, C phase windings measure.Each commutation, first preceding test phase winding electric discharge, then replaces test connection, then to existing test Phase winding charges.Due to all at least 17 grades taps of the high-pressure side winding of 110kV and above three-phase transformer Switch position, as carried out three-phase transformer high-pressure side direct current resistance m easurem ent using single-phase tester, commutation works not testing crew It is only very cumbersome, also waste the plenty of time.
The content of the invention
It is an object of the invention to provide a kind of special phase changer of direct-current resistance tester for transformer and phase change method, this is changed Phase device can a key replace test connection, while discharging preceding test phase winding, and existing test phase winding is filled Electricity.Compared with manually replacing test connection, operated using professional phase changer, both saved each electric discharge and replacement experiment and connect The time of line, also reduces the workload of testing crew.
In order to solve the above technical problems, the special phase changer of a kind of direct-current resistance tester for transformer disclosed by the invention, its It is characterized in that:It include MOS1 pipes~MOS6 pipes, resistance R1~resistance R6, resistance R1'~resistance R6', capacitance C1~capacitance C6, Relay A1~relay A6, DC power supply DC1 and DC power supply DC2, wherein, one end of the normally opened contact k1 of relay A1 connects Connect the cathode of DC power supply DC1, the anode of one end connection DC power supply DC1 of resistance R1', the other end connection of resistance R1' after One end of electric appliance A1 normally-closed contacts k1', the normally opened contact k1's of the other end connection relay A1 of relay A1 normally-closed contacts k1' The other end, one end of the other end connection resistance R1 of the normally opened contact k1 of relay A1, the other end connection MOS1 pipes of resistance R1 Grid, the voltage tester wire connection terminal U of the anode connection commutator transformer neutral conductor of DC power supply DC1, capacitance C1 are connected to Between the other end of resistance R1 and the anode of DC power supply DC1, the drain electrode connection direct-current resistance tester for transformer of MOS1 pipes is just The source electrode connection commutator transformer A phases line voltage test wire connection terminals U of voltage tester wire connection terminal U, the MOS1 pipe of pole detection mouth;
The cathode of one end connection DC power supply DC2 of the normally opened contact k2 of relay A2, one end connection direct current of resistance R2' The anode of power supply DC2, one end of the other end connection relay A2 normally-closed contacts k2' of resistance R2', relay A2 normally-closed contacts The other end of the normally opened contact k2 of the other end connection relay A2 of k2', the other end connection of the normally opened contact k2 of relay A2 One end of resistance R2, the grid of the other end connection MOS2 pipes of resistance R2, the anode of DC power supply DC2 are connected in commutator transformer The testing current wire connection terminal I of property line, capacitance C2 are connected between the other end of resistance R2 and the anode of DC power supply DC2, The source of testing current wire connection terminal I, the MOS2 pipe of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS2 pipes Pole connection commutator transformer A phase line current test wire connection terminals I;
The cathode of one end connection DC power supply DC1 of the normally opened contact k3 of relay A3, one end connection direct current of resistance R3' The anode of power supply DC1, one end of the other end connection relay A3 normally-closed contacts k3' of resistance R3', relay A3 normally-closed contacts The other end of the normally opened contact k3 of the other end connection relay A3 of k3', the other end connection of the normally opened contact k3 of relay A3 One end of resistance R3, the grid of the other end connection MOS3 pipes of resistance R3, capacitance C3 are connected to the other end and direct current of resistance R3 Between the anode of power supply DC1, the voltage tester of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS3 pipes connects The source electrode connection commutator transformer B phases line voltage test wire connection terminals U of line terminals U, MOS1 pipe;
The cathode of one end connection DC power supply DC2 of the normally opened contact k4 of relay A4, one end connection direct current of resistance R4' The anode of power supply DC2, one end of the other end connection relay A4 normally-closed contacts k4' of resistance R4', relay A4 normally-closed contacts The other end of the normally opened contact k4 of the other end connection relay A4 of k4', the other end connection of the normally opened contact k4 of relay A4 One end of resistance R4, the grid of the other end connection MOS4 pipes of resistance R4, capacitance C4 are connected to the other end and direct current of resistance R4 Between the anode of power supply DC2, the testing current of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS4 pipes connects The source electrode connection commutator transformer B phase line current test wire connection terminals I of line terminals I, MOS4 pipe;
The cathode of one end connection DC power supply DC1 of the normally opened contact k5 of relay A5, one end connection direct current of resistance R5' The anode of power supply DC1, one end of the other end connection relay A5 normally-closed contacts k5' of resistance R5', relay A5 normally-closed contacts The other end of the normally opened contact k5 of the other end connection relay A5 of k5', the other end connection of the normally opened contact k5 of relay A5 One end of resistance R5, the grid of the other end connection MOS5 pipes of resistance R5, capacitance C5 are connected to the other end and direct current of resistance R5 Between the anode of power supply DC1, the voltage tester of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS5 pipes connects The source electrode connection commutator transformer C phases line voltage test wire connection terminals U of line terminals U, MOS5 pipe;
The cathode of one end connection DC power supply DC2 of the normally opened contact k6 of relay A6, one end connection direct current of resistance R6' The anode of power supply DC2, one end of the other end connection relay A6 normally-closed contacts k6' of resistance R6', relay A6 normally-closed contacts The other end of the normally opened contact k6 of the other end connection relay A6 of k6', the other end connection of the normally opened contact k6 of relay A6 One end of resistance R6, the grid of the other end connection MOS6 pipes of resistance R6, capacitance C6 are connected to the other end and direct current of resistance R6 Between the anode of power supply DC2, the testing current of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS6 pipes connects The source electrode connection commutator transformer C phase line current test wire connection terminals I of line terminals I, MOS6 pipe.
A kind of phase change method using above-mentioned phase changer, it includes the following steps:
Step 1:Commutator transformer A phase lines are detected by direct-current resistance tester for transformer, control relay A1 and control Relay A2 is powered, control relay A3, relay A4, relay A5 and relay A6 power-off;Relay A1 and relay at this time Device A2 is powered, and the normally opened of the normally opened contact k1 and relay A2 of MOS1 pipes and 2 pipe trigger signal circuit relay electric appliance A1 of MOS touches Point k2 is closed, and DC power supply DC1 is charged by resistance R1 to capacitance C1, and DC power supply DC2 is charged by resistance R2 to capacitance C2, MOS1 is managed and MOS2 manages corresponding commutator transformer A phase voltages and the conducting of current measurement major loop;When commutator transformer A phase controls Circuit disconnects, and capacitance C1 starts to discharge by resistance R1 and resistance R1', and capacitance C2 starts to discharge by resistance R2 and resistance R2', Commutator transformer A phase voltages and current measurement major loop are closed;
Step 2:Commutator transformer B phase lines are detected by direct-current resistance tester for transformer, control relay A3 and control Relay A4 is powered, control relay A1, relay A2, relay A5 and relay A6 power-off;Relay A3 and relay at this time Device A4 is powered, the normally opened contact of the normally opened contact k3 and relay A4 of MOS3 pipes and MOS4 pipe trigger signal circuit relay electric appliances A3 K4 is closed, and DC power supply DC1 is charged by resistance R3 to capacitance C3, and DC power supply DC2 is charged by resistance R4 to capacitance C4, MOS3 is managed and MOS4 manages corresponding commutator transformer B phase voltages and the conducting of current measurement major loop;When commutator transformer B phase controls Circuit disconnects, and capacitance C3 starts to discharge by resistance R3 and resistance R3', and capacitance C4 starts to discharge by resistance R4 and resistance R4', Commutator transformer B phase voltages and current measurement major loop are closed;
Step 3:Commutator transformer C phase lines are detected by direct-current resistance tester for transformer, control relay A5 and control Relay A6 is powered, control relay A1, relay A2, relay A3 and relay A4 power-off;Relay A5 and relay at this time Device A6 is powered, the normally opened contact of the normally opened contact k5 and relay A6 of MOS5 pipes and MOS6 pipe trigger signal circuit relay electric appliances A5 K6 is closed, and DC power supply DC1 is charged by resistance R5 to capacitance C5, and DC power supply DC2 is charged by resistance R6 to capacitance C6, MOS5 is managed and MOS6 manages corresponding commutator transformer C phase voltages and the conducting of current measurement major loop;When commutator transformer C phase controls Circuit disconnects, and capacitance C5 starts to discharge by resistance R5 and resistance R5', and capacitance C6 starts to discharge by resistance R6 and resistance R6', Commutator transformer C phase voltages and current measurement major loop are closed.
The present invention can a key replace test connection, while discharging preceding test phase winding, and to existing test phase Winding charges.With manually replace test connection compared with, operated using professional phase changer, both saved it is each electric discharge and The time of test connection is replaced, also reduces the workload of testing crew.
The present invention mainly has three advantages using Sofe Switch of the metal-oxide-semiconductor as measurement major loop:First, metal-oxide-semiconductor conducting resistance It is much smaller relative to DCR of Transformer, do not influenced substantially for measurement result;2nd, the metal-oxide-semiconductor in saturation region is suitable In a variable resistor, overvoltage can will not be produced by metal-oxide-semiconductor repid discharge by being disconnected winding;3rd, during switching circuit, Preceding test phase circuit, which is disconnected, to be turned on and can be carried out at the same time with now testing phase circuit, saves the time.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
A kind of special phase changer of direct-current resistance tester for transformer of the present invention, it is characterised in that:It include MOS1 pipe~ MOS6 pipes, resistance R1~resistance R6, resistance R1'~resistance R6', capacitance C1~capacitance C6, relay A1~relay A6, direct current Power supply DC1 and DC power supply DC2, wherein, the cathode of one end connection DC power supply DC1 of the normally opened contact k1 of relay A1, electricity The anode of one end connection DC power supply DC1 of R1' is hindered, the other end of resistance R1' connects the one of relay A1 normally-closed contacts k1' End, the other end of the normally opened contact k1 of the other end connection relay A1 of relay A1 normally-closed contacts k1', relay A1's is normally opened One end of the other end connection resistance R1 of contact k1, the grid of the other end connection MOS1 pipes of resistance R1, DC power supply DC1's is negative Voltage tester the wire connection terminal U, capacitance C1 of the pole connection commutator transformer neutral conductor are connected to the other end and direct current of resistance R1 Between the anode of source DC1, the voltage tester of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth IN of MOS1 pipes connects The source electrode connection commutator transformer A phases line voltage test wire connection terminals U of line terminals U, MOS1 pipe;
The cathode of one end connection DC power supply DC2 of the normally opened contact k2 of relay A2, one end connection direct current of resistance R2' The anode of power supply DC2, one end of the other end connection relay A2 normally-closed contacts k2' of resistance R2', relay A2 normally-closed contacts The other end of the normally opened contact k2 of the other end connection relay A2 of k2', the other end connection of the normally opened contact k2 of relay A2 One end of resistance R2, the grid of the other end connection MOS2 pipes of resistance R2, the anode of DC power supply DC2 are connected in commutator transformer The testing current wire connection terminal I of property line, capacitance C2 are connected between the other end of resistance R2 and the anode of DC power supply DC2, The source of testing current wire connection terminal I, the MOS2 pipe of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS2 pipes Pole connection commutator transformer A phase line current test wire connection terminals I;
The cathode of one end connection DC power supply DC1 of the normally opened contact k3 of relay A3, one end connection direct current of resistance R3' The anode of power supply DC1, one end of the other end connection relay A3 normally-closed contacts k3' of resistance R3', relay A3 normally-closed contacts The other end of the normally opened contact k3 of the other end connection relay A3 of k3', the other end connection of the normally opened contact k3 of relay A3 One end of resistance R3, the grid of the other end connection MOS3 pipes of resistance R3, capacitance C3 are connected to the other end and direct current of resistance R3 Between the anode of power supply DC1, the voltage tester of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS3 pipes connects The source electrode connection commutator transformer B phases line voltage test wire connection terminals U of line terminals U, MOS1 pipe;
The cathode of one end connection DC power supply DC2 of the normally opened contact k4 of relay A4, one end connection direct current of resistance R4' The anode of power supply DC2, one end of the other end connection relay A4 normally-closed contacts k4' of resistance R4', relay A4 normally-closed contacts The other end of the normally opened contact k4 of the other end connection relay A4 of k4', the other end connection of the normally opened contact k4 of relay A4 One end of resistance R4, the grid of the other end connection MOS4 pipes of resistance R4, capacitance C4 are connected to the other end and direct current of resistance R4 Between the anode of power supply DC2, the testing current of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS4 pipes connects The source electrode connection commutator transformer B phase line current test wire connection terminals I of line terminals I, MOS4 pipe;
The cathode of one end connection DC power supply DC1 of the normally opened contact k5 of relay A5, one end connection direct current of resistance R5' The anode of power supply DC1, one end of the other end connection relay A5 normally-closed contacts k5' of resistance R5', relay A5 normally-closed contacts The other end of the normally opened contact k5 of the other end connection relay A5 of k5', the other end connection of the normally opened contact k5 of relay A5 One end of resistance R5, the grid of the other end connection MOS5 pipes of resistance R5, capacitance C5 are connected to the other end and direct current of resistance R5 Between the anode of power supply DC1, the voltage tester of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS5 pipes connects The source electrode connection commutator transformer C phases line voltage test wire connection terminals U of line terminals U, MOS5 pipe;
The cathode of one end connection DC power supply DC2 of the normally opened contact k6 of relay A6, one end connection direct current of resistance R6' The anode of power supply DC2, one end of the other end connection relay A6 normally-closed contacts k6' of resistance R6', relay A6 normally-closed contacts The other end of the normally opened contact k6 of the other end connection relay A6 of k6', the other end connection of the normally opened contact k6 of relay A6 One end of resistance R6, the grid of the other end connection MOS6 pipes of resistance R6, capacitance C6 are connected to the other end and direct current of resistance R6 Between the anode of power supply DC2, the testing current of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS6 pipes connects The source electrode connection commutator transformer C phase line current test wire connection terminals I of line terminals I, MOS6 pipe.
In above-mentioned technical proposal, the voltage tester terminals U of the anode detection mouth OUT of direct-current resistance tester for transformer connects Connect the voltage tester wire connection terminal U of the commutator transformer neutral conductor, the electricity of the anode detection mouth OUT of direct-current resistance tester for transformer The testing current wire connection terminal I of the current test terminals I connection commutator transformer neutral conductors.
In order to avoid being impacted to double bridge in single-phase tester, voltage MOS1 pipes, MOS3 pipes, MOS5 pipes and electric current MOS2 pipes, MOS4 pipes, MOS6 pipes trigger circuit use DC power supply DC1 and DC2 respectively.
In above-mentioned technical proposal, the DC power supply DC1 is identical with the voltage of DC power supply DC2, DC power supply DC1 with it is straight Galvanic electricity source DC2 mono- provides power supply to voltage circuit, another provides power supply to current loop, both are mutually isolated to prevent voltage There is short circuit in measuring loop and current measurement circuit.
In above-mentioned technical proposal, when direct-current resistance tester for transformer will detect commutator transformer A phase lines, relay is controlled Device A1 and control relay A2 are powered, control relay A3, relay A4, relay A5 and relay A6 power-off.
In above-mentioned technical proposal, when direct-current resistance tester for transformer will detect commutator transformer B phase lines, relay is controlled Device A3 and control relay A4 are powered, control relay A1, relay A2, relay A5 and relay A6 power-off.
In above-mentioned technical proposal, when direct-current resistance tester for transformer will detect commutator transformer C phase lines, relay is controlled Device A5 and control relay A6 are powered, control relay A1, relay A2, relay A3 and relay A4 power-off.
In above-mentioned technical proposal, the time constant of C1 chargings is related with R1, and the time constant of C2 chargings is related with R2, determines The conducting speed of MOS1 and MOS2 pipes;The time constant of C1 electric discharges is related with (R1+R1'), the time constant and (R2+ of C2 electric discharges R2' it is) related, determine the turn-off speed of MOS1 pipes and MOS2 pipes.Therefore, when R1 is smaller, the larger (R1*C1=1 of R1';(R1+ R1') during * C1=5), R2 is smaller, the larger (R2*C2=1 of R2';(R2+R2') during * C2=5) both it can make MOS1 and MOS2 pipes can To turn on rapidly, and the time in saturation region can be increased when MOS1 and MOS2 pipes turn off.All other corresponding commutation portions Dividing has identical structure and principle.
The anode of direct-current resistance tester for transformer cathode detection mouth IN and direct-current resistance tester for transformer in the present invention Detection mouth OUT accesses commutator transformer A phases, commutator transformer B phases, commutator transformer C phases and straight by the phase changer of the present invention The convertor transformer neutral conductor.
A kind of phase change method using above-mentioned phase changer, it includes the following steps:
Step 1:Commutator transformer A phase lines are detected by direct-current resistance tester for transformer, control relay A1 and control Relay A2 is powered, control relay A3, relay A4, relay A5 and relay A6 power-off;Relay A1 and relay at this time Device A2 is powered, and the normally opened of the normally opened contact k1 and relay A2 of MOS1 pipes and 2 pipe trigger signal circuit relay electric appliance A1 of MOS touches Point k2 is closed, and DC power supply DC1 is charged by resistance R1 to capacitance C1, and DC power supply DC2 is charged by resistance R2 to capacitance C2, MOS1 is managed and MOS2 manages corresponding commutator transformer A phase voltages and the conducting of current measurement major loop;When commutator transformer A phase controls Circuit disconnects, and capacitance C1 starts to discharge by resistance R1 and resistance R1', and capacitance C2 starts to discharge by resistance R2 and resistance R2', Commutator transformer A phase voltages and current measurement major loop are closed;
Step 2:Commutator transformer B phase lines are detected by direct-current resistance tester for transformer, control relay A3 and control Relay A4 is powered, control relay A1, relay A2, relay A5 and relay A6 power-off;Relay A3 and relay at this time Device A4 is powered, the normally opened contact of the normally opened contact k3 and relay A4 of MOS3 pipes and MOS4 pipe trigger signal circuit relay electric appliances A3 K4 is closed, and DC power supply DC1 is charged by resistance R3 to capacitance C3, and DC power supply DC2 is charged by resistance R4 to capacitance C4, MOS3 is managed and MOS4 manages corresponding commutator transformer B phase voltages and the conducting of current measurement major loop;When commutator transformer B phase controls Circuit disconnects, and capacitance C3 starts to discharge by resistance R3 and resistance R3', and capacitance C4 starts to discharge by resistance R4 and resistance R4', Commutator transformer B phase voltages and current measurement major loop are closed;
Step 3:Commutator transformer C phase lines are detected by direct-current resistance tester for transformer, control relay A5 and control Relay A6 is powered, control relay A1, relay A2, relay A3 and relay A4 power-off;Relay A5 and relay at this time Device A6 is powered, the normally opened contact of the normally opened contact k5 and relay A6 of MOS5 pipes and MOS6 pipe trigger signal circuit relay electric appliances A5 K6 is closed, and DC power supply DC1 is charged by resistance R5 to capacitance C5, and DC power supply DC2 is charged by resistance R6 to capacitance C6, MOS5 is managed and MOS6 manages corresponding commutator transformer C phase voltages and the conducting of current measurement major loop;When commutator transformer C phase controls Circuit disconnects, and capacitance C5 starts to discharge by resistance R5 and resistance R5', and capacitance C6 starts to discharge by resistance R6 and resistance R6', Commutator transformer C phase voltages and current measurement major loop are closed.
The content that this specification is not described in detail belongs to the prior art known to professional and technical personnel in the field.

Claims (7)

  1. A kind of 1. special phase changer of direct-current resistance tester for transformer, it is characterised in that:It includes MOS1 pipes~MOS6 pipes, resistance R1~resistance R6, resistance R1'~resistance R6', capacitance C1~capacitance C6, relay A1~relay A6, DC power supply DC1 and straight Galvanic electricity source DC2, wherein, the cathode of one end connection DC power supply DC1 of the normally opened contact k1 of relay A1, one end of resistance R1' The anode of DC power supply DC1 is connected, the other end of resistance R1' connects one end of relay A1 normally-closed contacts k1', and relay A1 is normal The other end of the normally opened contact k1 of the other end connection relay A1 of closed contact k1', the normally opened contact k1's of relay A1 is another One end of end connection resistance R1, the grid of the other end connection MOS1 pipes of resistance R1, the anode connection direct current of DC power supply DC1 become The voltage tester wire connection terminal U of the depressor neutral conductor, capacitance C1 be connected to the other end of resistance R1 and DC power supply DC1 anode it Between, voltage tester wire connection terminal U, the MOS1 pipe of the drain electrode connection direct-current resistance tester for transformer cathode detection mouth of MOS1 pipes Source electrode connection commutator transformer A phases line voltage test wire connection terminals U;
    The cathode of one end connection DC power supply DC2 of the normally opened contact k2 of relay A2, one end connection DC power supply of resistance R2' The anode of DC2, one end of the other end connection relay A2 normally-closed contacts k2' of resistance R2', relay A2 normally-closed contacts k2''s The other end of the normally opened contact k2 of other end connection relay A2, the other end connection resistance R2 of the normally opened contact k2 of relay A2 One end, the grid of the other end connection MOS2 pipes of resistance R2, the anode connection commutator transformer neutral conductor of DC power supply DC2 Testing current wire connection terminal I, capacitance C2 are connected between the other end of resistance R2 and the anode of DC power supply DC2, MOS2 pipes The source electrode connection of testing current wire connection terminal I, the MOS2 pipe of drain electrode connection direct-current resistance tester for transformer cathode detection mouth is straight Convertor transformer A phase line currents test wire connection terminal I;
    The cathode of one end connection DC power supply DC1 of the normally opened contact k3 of relay A3, one end connection DC power supply of resistance R3' The anode of DC1, one end of the other end connection relay A3 normally-closed contacts k3' of resistance R3', relay A3 normally-closed contacts k3''s The other end of the normally opened contact k3 of other end connection relay A3, the other end connection resistance R3 of the normally opened contact k3 of relay A3 One end, the grid of the other end connection MOS3 pipes of resistance R3, capacitance C3 is connected to the other end of resistance R3 and DC power supply DC1 Anode between, MOS3 pipes drain electrode connection direct-current resistance tester for transformer cathode detection mouth voltage tester wire connection terminal U, The source electrode connection commutator transformer B phases line voltage test wire connection terminals U of MOS1 pipes;
    The cathode of one end connection DC power supply DC2 of the normally opened contact k4 of relay A4, one end connection DC power supply of resistance R4' The anode of DC2, one end of the other end connection relay A4 normally-closed contacts k4' of resistance R4', relay A4 normally-closed contacts k4''s The other end of the normally opened contact k4 of other end connection relay A4, the other end connection resistance R4 of the normally opened contact k4 of relay A4 One end, the grid of the other end connection MOS4 pipes of resistance R4, capacitance C4 is connected to the other end of resistance R4 and DC power supply DC2 Anode between, MOS4 pipes drain electrode connection direct-current resistance tester for transformer cathode detection mouth testing current wire connection terminal I, The source electrode connection commutator transformer B phase line current test wire connection terminals I of MOS4 pipes;
    The cathode of one end connection DC power supply DC1 of the normally opened contact k5 of relay A5, one end connection DC power supply of resistance R5' The anode of DC1, one end of the other end connection relay A5 normally-closed contacts k5' of resistance R5', relay A5 normally-closed contacts k5''s The other end of the normally opened contact k5 of other end connection relay A5, the other end connection resistance R5 of the normally opened contact k5 of relay A5 One end, the grid of the other end connection MOS5 pipes of resistance R5, capacitance C5 is connected to the other end of resistance R5 and DC power supply DC1 Anode between, MOS5 pipes drain electrode connection direct-current resistance tester for transformer cathode detection mouth voltage tester wire connection terminal U, The source electrode connection commutator transformer C phases line voltage test wire connection terminals U of MOS5 pipes;
    The cathode of one end connection DC power supply DC2 of the normally opened contact k6 of relay A6, one end connection DC power supply of resistance R6' The anode of DC2, one end of the other end connection relay A6 normally-closed contacts k6' of resistance R6', relay A6 normally-closed contacts k6''s The other end of the normally opened contact k6 of other end connection relay A6, the other end connection resistance R6 of the normally opened contact k6 of relay A6 One end, the grid of the other end connection MOS6 pipes of resistance R6, capacitance C6 is connected to the other end of resistance R6 and DC power supply DC2 Anode between, MOS6 pipes drain electrode connection direct-current resistance tester for transformer cathode detection mouth testing current wire connection terminal I, The source electrode connection commutator transformer C phase line current test wire connection terminals I of MOS6 pipes.
  2. 2. the special phase changer of direct-current resistance tester for transformer according to claim 1, it is characterised in that:Transformer dc The voltage tester wire connection terminal of the voltage tester terminals U connection commutator transformer neutral conductors of the anode detection mouth of resistance meter U, the electric current of the testing current terminals I connection commutator transformer neutral conductors of the anode detection mouth of direct-current resistance tester for transformer Test wire connection terminal I.
  3. 3. the special phase changer of direct-current resistance tester for transformer according to claim 1, it is characterised in that:The direct current Source DC1 is identical with the voltage of DC power supply DC2.
  4. 4. the special phase changer of direct-current resistance tester for transformer according to claim 1, it is characterised in that:When transformer is straight When leakage resistance tester will detect commutator transformer A phase lines, control relay A1 and control relay A2 are powered, and control relay A3, relay A4, relay A5 and relay A6 power-off.
  5. 5. the special phase changer of direct-current resistance tester for transformer according to claim 1, it is characterised in that:When transformer is straight When leakage resistance tester will detect commutator transformer B phase lines, control relay A3 and control relay A4 are powered, and control relay A1, relay A2, relay A5 and relay A6 power-off.
  6. 6. the special phase changer of direct-current resistance tester for transformer according to claim 1, it is characterised in that:When transformer is straight When leakage resistance tester will detect commutator transformer C phase lines, control relay A5 and control relay A6 are powered, and control relay A1, relay A2, relay A3 and relay A4 power-off.
  7. 7. a kind of phase change method using phase changer described in claim 1, it is characterised in that it includes the following steps:
    Step 1:Commutator transformer A phase lines, control relay A1 and control relay are detected by direct-current resistance tester for transformer Device A2 is powered, control relay A3, relay A4, relay A5 and relay A6 power-off;Relay A1 and relay A2 at this time It is powered, the normally opened contact k2 of the normally opened contact k1 and relay A2 of MOS1 pipes and 2 pipe trigger signal circuit relay electric appliance A1 of MOS Closure, DC power supply DC1 are charged by resistance R1 to capacitance C1, and DC power supply DC2 is charged by resistance R2 to capacitance C2, MOS1 Pipe and MOS2 manage corresponding commutator transformer A phase voltages and the conducting of current measurement major loop;When commutator transformer A phase controls circuit Disconnect, capacitance C1 starts to discharge by resistance R1 and resistance R1', and capacitance C2 starts to discharge by resistance R2 and resistance R2', direct current Transformer A phase voltages and current measurement major loop are closed;
    Step 2:Commutator transformer B phase lines, control relay A3 and control relay are detected by direct-current resistance tester for transformer Device A4 is powered, control relay A1, relay A2, relay A5 and relay A6 power-off;Relay A3 and relay A4 at this time Powered, the normally opened contact k4 of the normally opened contact k3 and relay A4 of MOS3 pipes and MOS4 pipe trigger signal circuit relay electric appliances A3 are closed Close, DC power supply DC1 is charged by resistance R3 to capacitance C3, and DC power supply DC2 is charged by resistance R4 to capacitance C4, MOS3 pipes Corresponding commutator transformer B phase voltages and the conducting of current measurement major loop are managed with MOS4;When commutator transformer B phase controls circuit is broken Open, capacitance C3 starts to discharge by resistance R3 and resistance R3', and capacitance C4 starts to discharge by resistance R4 and resistance R4', and direct current becomes Depressor B phase voltages and current measurement major loop are closed;
    Step 3:Commutator transformer C phase lines, control relay A5 and control relay are detected by direct-current resistance tester for transformer Device A6 is powered, control relay A1, relay A2, relay A3 and relay A4 power-off;Relay A5 and relay A6 at this time Powered, the normally opened contact k6 of the normally opened contact k5 and relay A6 of MOS5 pipes and MOS6 pipe trigger signal circuit relay electric appliances A5 are closed Close, DC power supply DC1 is charged by resistance R5 to capacitance C5, and DC power supply DC2 is charged by resistance R6 to capacitance C6, MOS5 pipes Corresponding commutator transformer C phase voltages and the conducting of current measurement major loop are managed with MOS6;When commutator transformer C phase controls circuit is broken Open, capacitance C5 starts to discharge by resistance R5 and resistance R5', and capacitance C6 starts to discharge by resistance R6 and resistance R6', and direct current becomes Depressor C phase voltages and current measurement major loop are closed.
CN201711430965.4A 2017-12-26 2017-12-26 Special phase converter for transformer direct-current resistance tester and phase conversion method Active CN107966613B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711430965.4A CN107966613B (en) 2017-12-26 2017-12-26 Special phase converter for transformer direct-current resistance tester and phase conversion method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711430965.4A CN107966613B (en) 2017-12-26 2017-12-26 Special phase converter for transformer direct-current resistance tester and phase conversion method

Publications (2)

Publication Number Publication Date
CN107966613A true CN107966613A (en) 2018-04-27
CN107966613B CN107966613B (en) 2020-02-07

Family

ID=61994863

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711430965.4A Active CN107966613B (en) 2017-12-26 2017-12-26 Special phase converter for transformer direct-current resistance tester and phase conversion method

Country Status (1)

Country Link
CN (1) CN107966613B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202797894U (en) * 2012-07-17 2013-03-13 成都玺汇科技有限公司 Automatic adjuster of power source phase sequence for three-phase asynchronous motor
MD943Z (en) * 2015-01-30 2016-03-31 Технический университет Молдовы Method for measuring the impedance components
CN206422538U (en) * 2017-01-14 2017-08-18 河南中盟电气设备有限公司 Three-phase load unbalance self-checking device
CN107147113A (en) * 2017-06-05 2017-09-08 泰豪科技股份有限公司 A kind of phase change method and device without phase fault
CN207650278U (en) * 2017-12-26 2018-07-24 国家电网公司 The special phase changer of direct-current resistance tester for transformer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202797894U (en) * 2012-07-17 2013-03-13 成都玺汇科技有限公司 Automatic adjuster of power source phase sequence for three-phase asynchronous motor
MD943Z (en) * 2015-01-30 2016-03-31 Технический университет Молдовы Method for measuring the impedance components
CN206422538U (en) * 2017-01-14 2017-08-18 河南中盟电气设备有限公司 Three-phase load unbalance self-checking device
CN107147113A (en) * 2017-06-05 2017-09-08 泰豪科技股份有限公司 A kind of phase change method and device without phase fault
CN207650278U (en) * 2017-12-26 2018-07-24 国家电网公司 The special phase changer of direct-current resistance tester for transformer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张昕 等: "龙政直流系统换相失败故障分析", 《湖北电力》 *

Also Published As

Publication number Publication date
CN107966613B (en) 2020-02-07

Similar Documents

Publication Publication Date Title
CN108693439A (en) A kind of small current neutral grounding system multi-line is the same as phase single-phase grounding selecting method
CN107785884A (en) A kind of more level active compensation devices of three-phase four-arm and control method
CN207650278U (en) The special phase changer of direct-current resistance tester for transformer
CN102508155B (en) Test circuit for internally installed load switch of intelligent electric energy meter
CN109932616B (en) Method for judging and positioning one-phase-lack fault of 10kV distribution network
CN101424715B (en) Power frequency parameter measuring set for high-pressure power transmission line
CN203365531U (en) Novel alternating-current and direct-current high-voltage electroscope
CN109256762A (en) Power distribution network single-phase fault current compensation control method, device and system
CN102879710B (en) System and method for detecting single-phase ground fault point of power distribution line
CN107785883A (en) A kind of more level active compensation devices of three-phase four-arm and control method
JP2014128165A (en) Insulation determination system
CN107957539B (en) A kind of electromagnetic potential transformer first winding tail end insulation detecting method and device
CN203825089U (en) Remote monitoring device of transformer insulating resistance
CN105807187A (en) Single-phase ground-fault assist detection device
CN107966613A (en) The special phase changer of direct-current resistance tester for transformer and phase change method
CN202916381U (en) Polarity testing device of transformer
CN107561406A (en) It is a kind of based on fault line selection method for single-phase-to-ground fault of the multiterminal than width phase comparing method
CN204479671U (en) A kind of DC converter station direct current arrester electrification detection system
CN209327527U (en) A kind of dynamic electric resistor test equipment
CN110780127A (en) Portable automatic phase sequence detection device
CN108414886A (en) A kind of mutual table method of power distribution network
CN103730879A (en) Protection device for power utilization system of transformer substation
CN201311456Y (en) Power frequency parameter measuring device for high-voltage transmission lines
CN202930905U (en) Multifunctional breaker
CN203932966U (en) A kind of device that earth fault signal is provided to demarcation switch

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant