CN110988407B - Switching device for detecting main transformer protection loop - Google Patents

Switching device for detecting main transformer protection loop Download PDF

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Publication number
CN110988407B
CN110988407B CN201911221898.4A CN201911221898A CN110988407B CN 110988407 B CN110988407 B CN 110988407B CN 201911221898 A CN201911221898 A CN 201911221898A CN 110988407 B CN110988407 B CN 110988407B
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Prior art keywords
relay
input
output
respectively connected
singlechip
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CN201911221898.4A
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CN110988407A (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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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02General constructional details
    • G01R1/04Housings; Supporting members; Arrangements of terminals
    • G01R1/0408Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
    • G01R1/0416Connectors, terminals
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/40Display 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 loop, which comprises a device body, wherein an input and 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 singlechip and a relay, the signal input end of the singlechip is connected with a touch controller through an optical coupler, the signal output end of the singlechip is connected with the relay through the optical coupler, the signal output end of the singlechip 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 and 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-IC and IN-In, the output voltage comprises four groups of UA1-UA2-UA3, UB1-UB2-UB3, UC1-UC2-UC3, UN1-UN 2-UB and U3, and the output current comprises four groups of input ends of IA-3 and I-In 2-I2; the invention has the advantages of automatic switching, reducing the rerouting frequency and improving the working efficiency.

Description

Switching device for detecting main transformer protection loop
Technical Field
The invention relates to the technical field of power equipment, in particular to a switching device for detecting a main transformer protection loop.
Background
Debugging and fixed inspection work such as transformer station main transformer protection and the like is performed, and because of more protection types, workers need frequent complicated steps such as plugging and unplugging, changing test wires and the like, so that the working time is wasted, the working efficiency is reduced, and certain potential safety hazards can be brought by wrong line changing; therefore, it is necessary to provide a switching device for detecting a main transformer protection circuit, which automatically switches, reduces the rerouting frequency and improves 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 is capable of automatically switching, reducing the rerouting frequency and improving the working efficiency.
The purpose of the invention is realized in the following way: the switching device for detecting the main transformer protection loop comprises a device body, an input and 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 singlechip and a relay, a signal input end of the singlechip is connected with a touch controller through an optical coupler, a signal output end of the singlechip is connected with the relay through the optical coupler, the signal output end of the singlechip 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 and 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 and IN-In, the output voltage comprises four groups of UA1-UA2-UA3, UB1-UB2-UB3, UC1-UC2-UC3, UN1-UN 2-UB and I-IN 3, and the output voltage comprises four groups of input ends of IA-IA 2-IB3 and I-IN 2-I2.
The number of the relays is six, and the relays are respectively recorded as a relay S1, a relay S2, a relay S3, a relay S4, a relay S5 and a relay S6, wherein the relays are single-pole double-throw relays, a group of common contacts and two groups of switching contacts.
Input voltage UA, UB, UC, UN of the input/output plug is respectively connected with a public end of a relay S1, normally closed contacts of the relay S1 are respectively connected with output voltages UA1, UB1, UC1 and UN1, and normally open contacts of the relay S1 are respectively connected with output voltages UA2, UB2, UC2 and UN2.
Input voltage Ua, ub, uc, un of the input/output plug is respectively connected with a public end of a relay S2, normally closed contacts of the relay S2 are respectively connected with output voltages UA3, UB3, UC3 and UN3, and normally open contacts of the relay S2 are respectively connected with the output voltages UA2, UB2, UC2 and UN2.
Input current IA, IB, IC, IN of the input and output plug is respectively connected with a common end of a relay S5, normally closed contacts of the relay S5 are respectively connected with output currents IA1, IB1, IC1 and IN1, normally open contacts of the relay S5 are respectively connected with output currents IA2, IB2, IC2 and IN2, input current IA, IB, IC, IN is also respectively connected with a common end of an S6, and normally open contacts of the relay S6 are connected with an IN end.
Input current Ia, ib, ic, in of the input and output plug is respectively connected with a common end of a relay S4, normally closed contacts of the relay S4 are respectively connected with output currents IA3, IB3, IC3 and IN3, normally open contacts of the relay S4 are respectively connected with output currents IA2, IB2, IC2 and IN2, input current Ia, ib, ic, in is also respectively connected with the common end of the relay S3, and normally open contacts of the relay S3 are connected with an IN end.
The singlechip is STC12C5A60S2 singlechip, and the power supply is a 5VDC power supply.
The invention has the beneficial effects that: the device consists of a touch screen, a main control board and an input/output plug; the main control board comprises a power supply, a singlechip and a relay, 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 a charged manner, the time in a program is mainly used for sequential control, and the S3 and the S6 are added in the current switching process to prevent a current loop from being opened; the invention has the advantages of automatic switching, reducing the rerouting frequency and improving the 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 diagram of a connection structure of a main control board according to the present invention.
FIG. 3 is a schematic view of a touch screen structure of 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" 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.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings.
Examples
The switching device for detecting the main transformer protection loop comprises a device body 1, an input and 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 singlechip and a relay, a signal input end of the singlechip is connected with a touch controller 4 through an optical coupler, a signal output end of the singlechip is connected with the relay through the optical coupler, a signal output end of the singlechip 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 and output plug 2 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 and IN-IN, the output voltage comprises four groups of UA1-UA2-UA3, UB1-UB 2-UC3, UC 1-UB 2-UC3, UB1-UB 2-3, U2-IC-UB 2-I, and U-I2-I3, and the output current comprises four groups of input ends of UB-UB 2-UB3 and I-I2-I2.
The device body 1 is electrified, the default state is a high-voltage-low-voltage state, the relay coil is not electrified, and the joint states of the relays S1, S2, S3, S4, S5 and S6 are all in an off state, as shown in fig. 4; the 'high voltage-medium voltage' button of the touch screen 3 is pressed, at this time, the voltage and the current are synchronously switched, and the voltage is switched: relays S1, S2 are opened, delay for 1 second, relay S1 is opened, relay S2 is closed, and voltage switching is completed. And (3) current switching: s3, S6 are closed (current open circuit is prevented in the switching process), delay is 1 second, relays S4, S5 are closed, delay is 800 milliseconds, relay S4 is closed, relay S5 is opened, delay is 1 second, relays S3, S6 are opened, and current switching is completed, as shown in FIG. 5.
Pressing the "medium-low voltage" button of the touch screen 3, at this time, the voltage and current are synchronously switched, and the voltage is switched: relays S1, S2 are opened, relay S1 is closed, relay S2 is opened, and voltage switching is completed. And (3) current switching: relays S3, S6 are closed (preventing current from opening during switching), delay 1 second, relays S4, S5 are closed, delay 800 milliseconds, relay S4 is open, relay S5 is closed, delay 1 second, relays S3, S6 are open, current switching is completed, as shown in fig. 6.
The 'high voltage-low voltage' button of the touch screen 3 is pressed, at this time, the voltage and the current are synchronously switched, and the voltage is switched: the relays S1 and S2 are turned off, and the voltage switching is completed. And (3) current switching: relays S3, S6 are closed (preventing current from being opened during switching), delayed for 1 second, relays S4, S5 are opened, delayed for 1 second, relays S3, S6 are opened, and current switching is completed, as shown in fig. 7.
The device consists of a touch screen 3, a main control board and an input/output plug 2; the main control board comprises a power supply, a singlechip and a relay, 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 a charged manner, the time in a program is mainly used for sequential control, and the S3 and the S6 are added in the current switching process to prevent a current loop from being opened; the invention has the advantages of automatic switching, reducing the rerouting frequency and improving the working efficiency.
Examples
As shown IN fig. 1-7, a switching device for detecting a main transformer protection loop comprises a device body 1, wherein an input and 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 singlechip and a relay, a signal input end of the singlechip is connected with a touch controller 4 through an optical coupler, a signal output end of the singlechip is connected with the relay through the optical coupler, the signal output end of the singlechip is also 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 and 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, the input current comprises four groups of input ends of IA-Ia, IB-IC-IC, IN-IN, the output voltage comprises four groups of UA1-UA2-UA3, UB1-UB2-UB3, IB-UB 2-UB3, and U-UB 2-IN3, and the output current comprises four groups of input ends of UB-UB 2-UB3 and IN-UB 3.
The number of relays is six, which 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, one group of public contacts and two groups of conversion contacts, the input voltage UA, UB, UC, UN of the input-output plug 2 is respectively connected with the public end of the relay S1, the normally closed contacts of the relay S1 are respectively connected with the output voltages UA1, UB1, UC1 and UN1, the normally open contacts of the relay S1 are respectively connected with the output voltages UA2, UB2, UC2 and UN2, the input voltage Ua, ub, uc, un of the input-output plug 2 is respectively connected with the public end of the relay S2, the normally closed contacts of the relay S2 are respectively connected with the output voltages UA3, UB3, UC3 and UN3, the normally open contacts of the relay S2 are respectively connected with the output voltages UA2, UB2, UC2 and UN2, input current IA, IB, IC, IN of input/output plug 2 is connected with the public end of relay S5 respectively, normally closed contact of relay S5 connects output current IA1, IB1, IC1, IN1 respectively, normally open contact of relay S5 connects output current IA2, IB2, IC2, IN2 respectively, input current IA, IB, IC, IN is also connected with the public end of S6 respectively, normally open contact of relay S6 is connected with the IN end, input current Ia, ib, ic, in of input/output plug 2 is connected with the public end of relay S4 respectively, normally closed contact of relay S4 connects output current IA3, IB3, IC3, IN3 respectively, normally open contact of relay S4 connects output current IA2, IB2, IC2, IN2 respectively, input current Ia, ib, ic, in is also connected with the public end of S3 respectively, normally open contact of relay S3 is connected with the IN end, the singlechip is STC 12A 60S2 singlechip, power is 5VDC power.
The device consists of a touch screen 3, a main control board and an input/output plug 2; the main control board comprises a power supply, a singlechip and a relay, 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 a charged manner, the time in a program is mainly used for sequential control, and the S3 and the S6 are added in the current switching process to prevent a current loop from being opened; the invention has the advantages of automatic switching, reducing the rerouting frequency and improving the working efficiency.

Claims (3)

1. The utility model provides a detect switching device of main transformer protection circuit, it includes the device body, its characterized in that: the device comprises a device body, and is characterized IN that an input and 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 singlechip and a relay, a signal input end of the singlechip is connected with a touch controller through an optical coupler, a signal output end of the singlechip is connected with the relay through the optical coupler, a signal output end of the singlechip 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 and output plug consists of four areas of input voltage, input current, output voltage and output current, wherein the input voltage comprises four groups of input ends of UA-UA, UB-UB, UC-UC, UN-UN, the input current comprises four groups of input ends of IA-Ia, IB-Ib, IC-IC, IN-IN, the output voltage comprises four groups of input ends of UA1-UA2-UA3, UB1-UB2-UB3, UC1-UC 2-UN3, and the output current comprises four groups of output ends of IA-IA 2-IB, IB 1-IC2-IC3, IB 2-IC 2-IN 3;
the number of the relays is six, and the relays are respectively recorded as a relay S1, a relay S2, a relay S3, a relay S4, a relay S5 and a relay S6, wherein the relays are single-pole double-throw relays, a group of common contacts and two groups of switching contacts;
the input voltage UA, UB, UC, UN of the input/output plug is respectively connected with the public end of the relay S1, the normally closed contact of the relay S1 is respectively connected with the output voltages UA1, UB1, UC1 and UN1, and the normally open contact of the relay S1 is respectively connected with the output voltages UA2, UB2, UC2 and UN2;
the input voltage Ua, ub, uc, un of the input/output plug is respectively connected with the public end of the relay S2, the normally closed contact of the relay S2 is respectively connected with the output voltages UA3, UB3, UC3 and UN3, and the normally open contact of the relay S2 is respectively connected with the output voltages UA2, UB2, UC2 and UN2;
input current IA, IB, IC, IN of the input/output plug is respectively connected with a public end of a relay S5, normally closed contacts of the relay S5 are respectively connected with output currents IA1, IB1, IC1 and IN1, normally open contacts of the relay S5 are respectively connected with output currents IA2, IB2, IC2 and IN2, input current IA, IB, IC, IN is also respectively connected with a public end of an S6, and normally open contacts of the relay S6 are connected with an IN end;
input current Ia, ib, ic, in of the input and output plug is respectively connected with a public end of a relay S4, normally closed contacts of the relay S4 are respectively connected with output currents IA3, IB3, IC3 and IN3, normally open contacts of the relay S4 are respectively connected with output currents IA2, IB2, IC2 and IN2, input current Ia, ib, ic, in is also respectively connected with the public end of the relay S3, and normally open contacts of the relay S3 are connected with an IN end.
2. The switching device for detecting a main transformer protection circuit according to claim 1, wherein: the singlechip is an STC12C5A60S2 singlechip.
3. 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
微机型变压器保护的缺陷及改进;刘利成 等;安徽电气工程职业技术学院学报;第12卷(第1期);1-3 *

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