CN110988407A - Switching device for detecting main transformer protection circuit - Google Patents

Switching device for detecting main transformer protection circuit Download PDF

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Publication number
CN110988407A
CN110988407A CN201911221898.4A CN201911221898A CN110988407A CN 110988407 A CN110988407 A CN 110988407A CN 201911221898 A CN201911221898 A CN 201911221898A CN 110988407 A CN110988407 A CN 110988407A
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China
Prior art keywords
relay
input
output
respectively connected
chip microcomputer
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CN201911221898.4A
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Chinese (zh)
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CN110988407B (en
Inventor
孙鹏荆
王长江
秦晓波
韩娟
李鹏
王剑锋
王姝洁
邓旗
王屿冰
谢佩瑶
师雨
韩盛选
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Hebi Power Supply Co of State Grid Henan Electric Power Co Ltd
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Hebi Power Supply Co of State Grid Henan Electric Power Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
    • G01R1/0416—Connectors, terminals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/40—Display of information, e.g. of data or controls

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Relay Circuits (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

The invention relates to a switching device for detecting a main transformer protection circuit, which comprises a device body, wherein an input/output plug, a touch screen and a main control board are arranged on the device body, the main control board comprises a power supply, a single chip microcomputer and a relay, the signal input end of the single chip microcomputer is connected with a touch controller through an optical coupler, the signal output end of the single chip microcomputer is connected with the relay through the optical coupler, the signal output end of the single chip microcomputer is also connected with a liquid crystal display area, the touch controller and the liquid crystal display area are arranged on the touch screen, the input/output plug consists of four areas of input voltage, input current, output voltage and output current, the input voltage comprises four groups of input ends of UA-Ua, UB-Ub, UC-Uc and UN-Un, the input current comprises four groups of input ends of IA-Ia, IB-Ib, IC-IC, the output voltage comprises four groups of output ends of UA1-UA2-UA3, UB1-UB2-UB3, UC1-UC2-UC3 and UN1-UN2-UN3, and the output current comprises four groups of output ends of IA1-IA2-IA3, IB1-IB2-IB3, IC1-IC2-IC3 and IN1-IN2-IN 3; the invention has the advantages of automatic switching, reduction of line changing frequency and improvement of working efficiency.

Description

Switching device for detecting main transformer protection circuit
Technical Field
The invention relates to the technical field of power equipment, in particular to a switching device for detecting a main transformer protection circuit.
Background
The transformer substation main transformer protection and other debugging and regular inspection work, due to more protection types, workers need frequent complex steps of plugging and unplugging, changing and connecting test lines and the like, the working time is wasted, the working efficiency is reduced, and certain potential safety hazards can be caused by line changing errors; therefore, it is necessary to provide a switching device for detecting a main transformer protection circuit, which can automatically switch, reduce the line change frequency and improve the working efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a switching device for detecting a main transformer protection loop, which can automatically switch, reduce the line change frequency and improve the working efficiency.
The purpose of the invention is realized as follows: a switching device for detecting a main transformer protection circuit comprises a device body, wherein an input/output plug, a touch screen and a main control board are arranged on the device body, the main control board comprises a power supply, a single chip microcomputer and a relay, a signal input end of the single chip microcomputer is connected with a touch controller through an optical coupler, a signal output end of the single chip microcomputer is connected with the relay through the optical coupler, a signal output end of the single chip microcomputer is further connected with a liquid crystal display area, the touch controller and the liquid crystal display area are arranged on the touch screen, the input/output plug comprises four areas of input voltage, input current, output voltage and output current, the input voltage comprises four groups of input ends of UA-Ua, UB-Ub, UC-Uc and UN-Un, the input current comprises four groups of input ends of IA-Ia, Ib-Ib, IC-IC and IN-IN, the output voltage comprises four groups of output ends of UA1-UA2-UA3, UB1-UB2-UB3, UC1-UC2-UC3 and UN1-UN2-UN3, and the output current comprises four groups of output ends of IA1-IA2-IA3, IB1-IB2-IB3, IC1-IC2-IC3 and IN1-IN2-IN 3.
The number of the relays is six, and the relays are respectively marked as a relay S1, a relay S2, a relay S3, a relay S4, a relay S5 and a relay S6, and the relays are single-pole double-throw relays, a group of common contacts and two groups of switching contacts.
Input voltages UA, UB, UC and UN of the input and output plugs are respectively connected with a common end of a relay S1, a normally closed contact of the relay S1 is respectively connected with output voltages UA1, UB1, UC1 and UN1, and a normally open contact of the relay S1 is respectively connected with output voltages UA2, UB2, UC2 and UN 2.
Input voltages Ua, Ub, Uc and Un of the input and output plugs are respectively connected with a common end of a relay S2, a normally closed contact of the relay S2 is respectively connected with output voltages UA3, UB3, UC3 and UN3, and a normally open contact of the relay S2 is respectively connected with output voltages UA2, UB2, UC2 and UN 2.
Input currents IA, IB, IC and IN of the input/output plug are respectively connected with a common end of a relay S5, a normally closed contact of a relay S5 is respectively connected with output currents IA1, IB1, IC1 and IN1, a normally open contact of a relay S5 is respectively connected with output currents IA2, IB2, IC2 and IN2, the input currents IA, IB, IC and IN are respectively connected with a common end of a S6, and the normally open contact of the relay S6 is connected with an IN end.
The input currents Ia, Ib, Ic and In of the input and output plugs are respectively connected with the common end of the relay S4, the normally closed contacts of the relay S4 are respectively connected with the output currents IA3, IB3, IC3 and IN3, the normally open contacts of the relay S4 are respectively connected with the output currents IA2, IB2, IC2 and IN2, the input currents Ia, Ib, Ic and In are respectively connected with the common end of the S3, and the normally open contacts of the relay S3 are connected with the In end.
The singlechip is an STC12C5A60S2 singlechip, and the power supply is a 5VDC power supply.
The invention has the beneficial effects that: the device is composed of a touch screen, a main control board and an input/output plug; the main control board comprises a power supply, a single chip microcomputer and a relay, wherein the relay is a single-pole double-throw relay, a group of common contacts and two groups of conversion contacts, 6 relays S1, S2, S3, S4, S5 and S6 are shared in the device, the device can be switched in an electrified mode and is mainly controlled sequentially by time in a program, and S3 and S6 are added in the current switching process to prevent a current loop from being opened; the invention has the advantages of automatic switching, reduction of line changing frequency and improvement of working efficiency.
Drawings
FIG. 1 is a schematic view of the external structure of the device body of the present invention.
Fig. 2 is a schematic view of a connection structure of the main control board according to the present invention.
Fig. 3 is a schematic diagram of a touch screen structure according to the present invention.
Fig. 4 is a state diagram of the relay in the default state of the invention.
Fig. 5 is a state diagram of the relay in the "high-medium voltage" state of the invention.
Fig. 6 is a state diagram of the relay in the "medium-low voltage" state of the invention.
Fig. 7 is a state diagram of the relay in the "high-low" state of the invention.
In the figure 1, a device body 2, an input/output plug 3, a touch screen 4, a touch controller 5 and a liquid crystal display area.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
A switching device for detecting a main transformer protection loop comprises a device body 1, wherein an input/output plug 2, a touch screen 3 and a main control board are arranged on the device body 1, the main control board comprises a power supply, a single chip microcomputer and a relay, a signal input end of the single chip microcomputer is connected with a touch controller 4 through an optical coupler, a signal output end of the single chip microcomputer is connected with the relay through the optical coupler, a signal output end of the single chip microcomputer is further connected with a liquid crystal display area 5, the touch controller 4 and the liquid crystal display area 5 are arranged on the touch screen 3, the input/output plug 2 comprises four areas of input voltage, input current, output voltage and output current, the input voltage comprises four groups of input ends of UA-Ua, UB-Ub, UC-Uc and UN-Un, and the input current comprises IA-Ia, IB-Ib, IC-IC, The output voltage comprises four groups of input ends of UA1-UA2-UA3, UB1-UB2-UB3, UC1-UC2-UC3 and UN1-UN2-UN3, and the output current comprises four groups of output ends of IA1-IA2-IA3, IB1-IB2-IB3, IC1-IC2-IC3 and IN1-IN2-IN 3.
The device body 1 is powered on, the default state is a high-voltage-low-voltage state, the relay coil is not electrified at the moment, and the joints of the relays S1, S2, S3, S4, S5 and S6 are all in an off state, as shown in FIG. 4; when a 'high-voltage-medium-voltage' button of the touch screen 3 is pressed, the voltage and the current are synchronously switched, and the voltage is switched: the relays S1, S2 are opened, 1 second delay, the relay S1 is opened, the relay S2 is closed, and the voltage switching is completed. Current switching: s3 and S6 are closed (to prevent the current from being opened during switching), 1 second is delayed, the relays S4 and S5 are closed, 800 milliseconds is delayed, the relay S4 is closed, the relay S5 is opened, 1 second is delayed, the relays S3 and S6 are opened, and the current switching is completed, as shown in fig. 5.
When a 'medium-voltage-low-voltage' button of the touch screen 3 is pressed, the voltage and the current are synchronously switched, and the voltage is switched: the relays S1, S2 are opened, 1 second is delayed, the relay S1 is closed, the relay S2 is opened, and the voltage switching is completed. Current switching: the relays S3, S6 are closed (to prevent the current from being opened during switching), 1 second is delayed, the relays S4, S5 are closed, 800 milliseconds is delayed, the relay S4 is opened, the relay S5 is closed, 1 second is delayed, the relays S3, S6 are opened, and the current switching is completed, as shown in fig. 6.
When a high-voltage-low-voltage button of the touch screen 3 is pressed, the voltage and the current are synchronously switched, and the voltage is switched: the relays S1, S2 are turned off, and the voltage switching is completed. Current switching: the relays S3 and S6 are closed (to prevent the open circuit of current during switching), 1 second is delayed, the relays S4 and S5 are opened, 1 second is delayed, the relays S3 and S6 are opened, and the current switching is completed, as shown in fig. 7.
The device is composed of a touch screen 3, a main control board and an input/output plug 2; the main control board comprises a power supply, a single chip microcomputer and a relay, wherein the relay is a single-pole double-throw relay, a group of common contacts and two groups of conversion contacts, 6 relays S1, S2, S3, S4, S5 and S6 are shared in the device, the device can be switched in an electrified mode and is mainly controlled sequentially by time in a program, and S3 and S6 are added in the current switching process to prevent a current loop from being opened; the invention has the advantages of automatic switching, reduction of line changing frequency and improvement of working efficiency.
Example 2
As shown in fig. 1-7, a switching device for detecting a main transformer protection circuit comprises a device body 1, wherein the device body 1 is provided with an input/output plug 2, a touch screen 3 and a main control board, the main control board comprises a power supply, a single chip microcomputer and a relay, a signal input end of the single chip microcomputer is connected with a touch controller 4 through an optical coupler, a signal output end of the single chip microcomputer is connected with the relay through the optical coupler, a signal output end of the single chip microcomputer is further connected with a liquid crystal display area 5, the touch controller 4 and the liquid crystal display area 5 are arranged on the touch screen 3, the input/output plug 2 is composed of four areas of input voltage, input current, output voltage and output current, the input voltage comprises four groups of input ends of UA-UA, UB-UB, UC-UC and UN-UN, the input current comprises four groups of input ends of, The output voltage comprises four groups of output ends of UA1-UA2-UA3, UB1-UB2-UB3, UC1-UC2-UC3 and UN1-UN2-UN3, and the output current comprises four groups of output ends of IA1-IA2-IA3, IB1-IB2-IB3, IC1-IC2-IC3 and IN1-IN2-IN 3.
The number of the relays is six, and the relays are respectively marked as a relay S1, a relay S2, a relay S3, a relay S4, a relay S5 and a relay S6, the relays are single-pole double-throw relays, a group of common contacts and two groups of conversion contacts, input voltages UA, UB, UC and UN of an input/output plug 2 are respectively connected with a common end of the relay S1, a normally closed contact of the relay S1 is respectively connected with output voltages UA1, UB1, UC1 and UN1, a normally open contact of the relay S1 is respectively connected with the output voltages UA1, UB1, UC1 and UN1, input voltages Ua, Ub, Uc and Un of the input/output plug 2 are respectively connected with a common end of the relay S1, an electric contact of the normally closed contact of the relay S1 is respectively connected with the output voltages UA1, UB1, UC1 and UN1, an input current of the relay S1 and an input/output terminal of the relay S1 and an electric current of the relay IB1 and an input/output terminal of the relay S1, normally closed contacts of a relay S5 are respectively connected with output currents IA1, IB1, IC1 and IN1, normally open contacts of a relay S5 are respectively connected with output currents IA2, IB2, IC2 and IN2, input currents IA, IB, IC and IN are also respectively connected with a common end of S6, normally open contacts of a relay S6 are connected with an IN end, input currents Ia, Ib, IC and IN of an input and output plug 2 are respectively connected with a common end of a relay S4, normally closed contacts of a relay S4 are respectively connected with output currents IA3, IB3, IC3 and IN3, normally open contacts of a relay S4 are respectively connected with output currents IA2, IB2, IC2 and IN2, input currents Ia, Ib, IC and IN are also respectively connected with a common end of the S2, normally open contacts of the relay S2 are connected with an IN end, the singlechip is an STC12C 60S2 singlechip and the power supply is a 5VDC power supply.
The device is composed of a touch screen 3, a main control board and an input/output plug 2; the main control board comprises a power supply, a single chip microcomputer and a relay, wherein the relay is a single-pole double-throw relay, a group of common contacts and two groups of conversion contacts, 6 relays S1, S2, S3, S4, S5 and S6 are shared in the device, the device can be switched in an electrified mode and is mainly controlled sequentially by time in a program, and S3 and S6 are added in the current switching process to prevent a current loop from being opened; the invention has the advantages of automatic switching, reduction of line changing frequency and improvement of working efficiency.

Claims (8)

1. The utility model provides a detect main auto-transformer protection circuit's auto-change over device, it includes the device body, its characterized in that: the device body is provided with an input/output plug, a touch screen and a main control board, the main control board comprises a power supply, a single chip microcomputer and a relay, the signal input end of the single chip microcomputer is connected with a touch controller through an optical coupler, the signal output end of the single chip microcomputer is connected with the relay through the optical coupler, the signal output end of the single chip microcomputer is further connected with a liquid crystal display area, the touch controller and the liquid crystal display area are arranged on the touch screen, the input/output plug comprises four input ends of input voltage, input current, output voltage and output current, the input voltage comprises four input ends of UA-Ua, UB-Ub, UC-Uc and UN-Un, the input current comprises four input ends of IA-Ia, IB-Ib, IC-IC and IN-IN, the output voltage comprises four input ends of UA1-UA2-UA3, UB1-UB2-UB, UC1-UC2-UC3, UN1-UN2-UN3, and output current comprises IA1-IA2-IA3, IB1-IB2-IB3, IC1-IC2-IC3, and IN1-IN2-IN 3.
2. The switching device for detecting a main transformer protection circuit according to claim 1, wherein: the number of the relays is six, and the relays are respectively marked as a relay S1, a relay S2, a relay S3, a relay S4, a relay S5 and a relay S6, and the relays are single-pole double-throw relays, a group of common contacts and two groups of conversion contacts.
3. The switching device for detecting a main transformer protection loop according to claim 2, wherein: input voltages UA, UB, UC and UN of the input and output plugs are respectively connected with a common end of a relay S1, a normally closed electric contact of the relay S1 is respectively connected with output voltages UA1, UB1, UC1 and UN1, and a normally open electric contact of the relay S1 is respectively connected with output voltages UA2, UB2, UC2 and UN 2.
4. The switching device for detecting a main transformer protection loop according to claim 2, wherein: input voltages Ua, Ub, Uc and Un of the input and output plugs are respectively connected with a common end of a relay S2, a normally closed electric contact of the relay S2 is respectively connected with output voltages UA3, UB3, UC3 and UN3, and a normally open electric contact of the relay S2 is respectively connected with output voltages UA2, UB2, UC2 and UN 2.
5. The switching device for detecting a main transformer protection loop according to claim 2, wherein: the input currents IA, IB, IC and IN of the input/output plug are respectively connected with a common end of a relay S5, a normally closed contact of a relay S5 is respectively connected with output currents IA1, IB1, IC1 and IN1, a normally open contact of a relay S5 is respectively connected with output currents IA2, IB2, IC2 and IN2, the input currents IA, IB, IC and IN are respectively connected with a common end of a S6, and the normally open contact of the relay S6 is connected with an IN end.
6. The switching device for detecting a main transformer protection loop according to claim 2, wherein: the input currents Ia, Ib, Ic and In of the input and output plugs are respectively connected with the common end of the relay S4, the normally closed contacts of the relay S4 are respectively connected with the output currents IA3, IB3, IC3 and IN3, the normally open contacts of the relay S4 are respectively connected with the output currents IA2, IB2, IC2 and IN2, the input currents Ia, Ib, Ic and In are respectively connected with the common end of the S3, and the normally open contacts of the relay S3 are connected with the In end.
7. The switching device for detecting a main transformer protection loop according to claim 2, wherein: the single chip microcomputer is an STC12C5A60S2 single chip microcomputer.
8. The switching device for detecting a main transformer protection circuit according to claim 1, wherein: the power supply is a 5VDC power supply.
CN201911221898.4A 2019-12-03 2019-12-03 Switching device for detecting main transformer protection loop Active CN110988407B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08263149A (en) * 1995-03-28 1996-10-11 Icom Inc Method and device for automatic voltage switching
JPH11295369A (en) * 1998-04-09 1999-10-29 Soukou Denki Seisakusho:Kk Relay testing device
CN201281728Y (en) * 2008-09-12 2009-07-29 保定华创电气有限公司 Direct current resistance tester of full-automatic transformer
CN106972620A (en) * 2017-04-28 2017-07-21 江苏易弘联控智能科技有限公司 A kind of dual power supply switch controller based on IEC61850 communication protocols
CN107390619A (en) * 2017-07-10 2017-11-24 上海出入境检验检疫局机电产品检测技术中心 A kind of instantaneous switching method of test current based on PLC controls

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08263149A (en) * 1995-03-28 1996-10-11 Icom Inc Method and device for automatic voltage switching
JPH11295369A (en) * 1998-04-09 1999-10-29 Soukou Denki Seisakusho:Kk Relay testing device
CN201281728Y (en) * 2008-09-12 2009-07-29 保定华创电气有限公司 Direct current resistance tester of full-automatic transformer
CN106972620A (en) * 2017-04-28 2017-07-21 江苏易弘联控智能科技有限公司 A kind of dual power supply switch controller based on IEC61850 communication protocols
CN107390619A (en) * 2017-07-10 2017-11-24 上海出入境检验检疫局机电产品检测技术中心 A kind of instantaneous switching method of test current based on PLC controls

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘利成 等: "微机型变压器保护的缺陷及改进", 安徽电气工程职业技术学院学报, vol. 12, no. 1, pages 1 - 3 *

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