CN201926744U - Dynamic detector for feeder switch of direct-current power supply - Google Patents

Abstract

The utility model discloses a dynamic detection device for a DC power feeder switch. The dynamic detection device for a DC power feeder switch is composed of a main monitoring unit, a plurality of switch modules and a remote monitoring device. The interface is connected to a remote monitoring device, and the other RS485 interface is connected to each switch module through its RS485 bus; each switch module is connected to the lower port of each feeder switch in the DC system to be tested. The utility model is a dynamic detection device for a DC power supply feeder switch that can correctly reflect the on-off of the feeder switch.

Description

DC power feeder switch dynamic detection device

technical field

The utility model relates to a device for dynamic detection of a feeder switch of a DC power supply system in a substation of an electric power system.

Background technique

The DC power supply system provides power for control loads, power loads, and DC emergency lighting loads through multiple feeder branches. Each feeder branch is controlled by its own feeder switch. Therefore, the reliability of the feeder branch switch is related to Stability directly affects the safety of substation operation. At present, there are two ways to indicate the on-off state of the feeder branch switch in the DC power system: one is to use the lower port of the switch to connect the indicator light in parallel, but it cannot realize remote transmission; the other is to use the auxiliary contact of the switch, which can realize The disadvantage of remote transmission is that the auxiliary contact is sometimes inconsistent with the main contact due to poor contact and other reasons, and cannot correctly reflect the on-off of the feeder switch. Therefore, it is a technical problem to be solved at present to design a dynamic detection device for a DC power feeder switch that can correctly reflect whether the feeder switch is on or off.

Contents of the invention

The technical problem to be solved by the utility model is to provide a dynamic detection device for a DC power feeder switch that can correctly reflect whether the feeder switch is on or off.

The technical scheme that the utility model solves its technical problem is:

DC power feeder switch dynamic detection device. The DC power feeder switch dynamic detection device is composed of a main monitoring unit, multiple switch modules and a remote monitoring device. The main monitoring unit includes two RS485 interfaces, which are connected to the remote monitoring device through an RS485 interface. , and the other RS485 interface is connected to each switch module through its RS485 bus; each switch module is connected to the lower port of each feeder switch in the DC system to be tested on the one hand, and the on-off state of the switch is judged by collecting voltage. Connect with the main monitoring unit through the RS485 bus to upload switch telemetry information. The operation process is as follows: the main monitoring unit uses 485 communication to obtain the closing and opening status of each feeder switch from the switch module, and displays it on the spot through the LCD, and can also transmit the remote monitoring device through the 485 interface; the switch module is to be tested by collecting The lower port voltage of each feeder switch in the DC system is used to detect the on-off state of the switch, and then uploaded to the main monitoring unit via the 485 bus.

The technical scheme that the utility model solves its technical problem can also be:

The main monitoring unit described in the utility model mainly includes a microprocessor U1, two ES485 interfaces U2, U3 and an intelligent display terminal U4. The model of U1 is ATMEGA128L8AI, the models of U2 and U3 are ADM2483, and the model of U4 is DMT64480T056. Pin 1 of U2 and U3 is connected to VCC, pins 2 and 8 of U2 and U3 are connected in parallel to GND, pin 7 of U2 and U3 are connected to VCC, pin 3 of U2 is connected to pin 59 of U1, pin 4 and pin 5 of U2 are connected in parallel Then connect 60 pins of U1, 6 pins of U2 connect to 61 pins of U1, 3 pins of U3 connect to 2 pins of U1, connect 4 pins and 5 pins of U3 in parallel and then connect 4 pins of U1, 6 pins of U3 connect to 3 pins of U1 GND pin of U4 is grounded, RX pin of U4 is connected to pin 28 of U1, TX pin of U4 is connected to pin 27 of U1, pin 20 of U1 is connected in parallel with R1 and C1, the other end of R1 is connected to VCC, and the other end of C1 is connected to GND , U1's 22 and 53 pins are connected in parallel and grounded, U1's 21 and 52 pins are connected in parallel and then connected to VCC, Y1 is connected between U1's 23 and 24 pins, and C2 and C3, C2 and C3 are respectively connected at both ends of Y1 The other end is connected in parallel to ground.

The number of feeder switches detected by the switch module described in the utility model is 6.

The switch module described in the utility model includes MSP430F2013 single-chip microcomputer and an RS485 interface of a model ADM2483, and the VSS pin of the MSP430F2013 single-chip microcomputer is connected with the ground wire; the VCC pin is connected to a 3.3V high level; The power-on reset function is completed; the VDD1 pin of the RS485 interface ADM2483 is connected to the 3.3V power supply, the GND1 pin is grounded, the RXO pin is connected to the P26 pin of the MSP430F2013, the TXI pin is connected to the P17 pin of the MSP430F2013, and the RE and DE pins are shorted to the P27 of the MSP430F2013 The A, B, VDD2, and GND2 pins of ADM2483 are connected to the RS485 bus of the RS485 interface to form a 485 communication loop; there are six switching input circuits, each of which uses an optocoupler to collect the feeder switches in the DC system to be tested The voltage of the lower port; the first way, the P10 pin of MSP430F2013 is grounded through the resistor R7 and connected to the 3 pin of the optocoupler PS2505 U1, the 4 pin of U1 is connected to the 3.3V power supply, and the 2 pin is connected to the " -", the 1st pin is connected to the "+" of the lower port of the feeder switch of the first branch through the resistor R1; the second way, the P11 pin of the MSP430F2013 is grounded through the resistor R8 and connected to the 3rd pin of the optocoupler PS2505 U2, and the 4th pin of U2 is connected to 3.3V power supply, pin 2 is connected to the "-" of the lower port of the feeder switch of the second branch, and pin 1 is connected to the "+" of the lower port of the feeder switch of the second branch through the resistor R2; the third road, the P12 pin of MSP430F2013 is connected to the resistor R9 Grounded and connected to pin 3 of optocoupler PS2505 U3, pin 4 of U3 is connected to 3.3V power supply, pin 2 is "-" at the lower port of the third branch feeder switch, and pin 1 is connected to the lower port of the third branch feeder switch through resistor R3 The "+" of the fourth channel, the P13 pin of MSP430F2013 is grounded through the resistor R10 and connected to the 3 pin of the optocoupler PS2505 U4, the 4 pin of U4 is connected to the 3.3V power supply, and the 2 pin is connected to the " -", the 1st pin is connected to the "+" of the fourth branch feeder switch through the resistance R4; the fifth line, the P14 pin of the MSP430F2013 is grounded through the resistor R11 and connected to the 3rd pin of the optocoupler PS2505 U5, and the 4th pin of U5 is connected to the 3.3V power supply, pin 2 is connected to the "-" of the lower port of the feeder switch of the fifth branch, and pin 1 is connected to the "+" of the lower port of the feeder switch of the fifth branch through the resistor R5; the sixth circuit, the P15 pin of the MSP430F2013 is connected to the resistor R12 Grounded and connected to pin 3 of optocoupler PS2505 U6, pin 4 of U6 is connected to 3.3V power supply, pin 2 is connected to "-" at the lower port of the feeder switch of the sixth branch, and pin 1 is connected to the feeder switch of the sixth branch through resistor R6 The "+" in the mouth.

Compared with the prior art, the utility model has the following advantages:

①The on-off state of the feeder switch of the substation DC system is displayed in real time on the spot, which is intuitive and convenient. It can also be remotely transmitted through the RS485 interface to realize the telemetry function of the feeder switch state, saving a lot of manpower and material resources.

②By collecting the voltage at the lower port of the feeder switch, the closing and opening state of the switch can be accurately detected, which overcomes the shortcomings of the auxiliary contact method (sometimes the opening and closing of the main contact is inconsistent with the main contact due to poor contact).

Description of drawings

Fig. 1 is the overall block diagram of the utility model.

Fig. 2 is the schematic circuit diagram of the main monitoring unit of the utility model.

Fig. 3 is a schematic circuit diagram of the switch module of the present invention.

Detailed ways

DC power feeder switch dynamic detection device. The DC power feeder switch dynamic detection device is composed of a main monitoring unit, multiple switch modules and a remote monitoring device. The main monitoring unit includes two RS485 interfaces, which are connected to the remote monitoring device through an RS485 interface. , and the other RS485 interface is connected to each switch module through its RS485 bus; each switch module is connected to the lower port of each feeder switch in the DC system to be tested. The main monitoring unit mainly includes a microprocessor U1, two 485 interface circuits U2, U3 and an intelligent display terminal U4, the model of U1 is ATMEGA128L8AI, the models of U2 and U3 are ADM2483, the model of U4 is DMT64480T056, U2, Pin 1 of U3 is connected to VCC, pins 2 and 8 of U2 and U3 are connected in parallel to GND, pin 7 of U2 and U3 are connected to VCC, pin 3 of U2 is connected to pin 59 of U1, pins 4 and 5 of U2 are connected in parallel and then connected The 60 pins of U1, the 6 pins of U2 are connected to the 61 pins of U1, the 3 pins of U3 are connected to the 2 pins of U1, the 4 pins and 5 pins of U3 are connected in parallel and then connected to the 4 pins of U1, the 6 pins of U3 are connected to the 3 pins of U1, The GND pin of U4 is grounded, the RX pin of U4 is connected to the 28 pin of U1, the TX pin of U4 is connected to the 27 pin of U1, the 20 pin of U1 is connected in parallel with R1 and C1, the other end of R1 is connected to VCC, the other end of C1 is connected to GND, U1 Pins 22 and 53 of U1 are connected in parallel and grounded, pins 21 and 52 of U1 are connected in parallel and connected to VCC, Y1 is connected between pins 23 and 24 of U1, C2 and C3 are connected at both ends of Y1, and the other terminals of C2 and C3 Connect one end to ground. There are 6 switch modules. The switch module includes an MSP430F2013 single-chip microcomputer and a 485 interface circuit of ADM2483, the VSS pin of the MSP430F2013 single-chip microcomputer is connected to the ground wire; the VCC pin is connected to a 3.3V high level; the RST pin is connected to a 3.3V high level through a resistor R13 to complete Power-on reset function. 485 interface circuit The VDD1 pin of ADM2483 is connected to the 3.3V power supply, the GND1 pin is grounded, the RXO pin is connected to the P26 pin of the MSP430F2013, the TXI pin is connected to the P17 pin of the MSP430F2013, the RE and DE pins are short-circuited and connected to the P27 pin of the MSP430F2013; the A of the ADM2483 , B, VDD2, and GND2 are connected to the RS485 bus of the RS485 interface to form a 485 communication loop. There are six switch input circuits, each of which collects the voltage at the lower port of each feeder switch in the DC system to be tested through an optocoupler; the first channel, P10 pin of MSP430F2013 is grounded through resistor R7 and connected to pin 3 of optocoupler PS2505 U1 Connected, pin 4 of U1 is connected to 3.3V power supply, pin 2 is connected to the "-" of the lower port of the first branch feeder switch, and pin 1 is connected to the "+" of the lower port of the first branch feeder switch through resistor R1; the second circuit, The P11 pin of MSP430F2013 is grounded through the resistor R8 and connected to the 3 pin of the optocoupler PS2505 U2, the 4 pin of U2 is connected to the 3.3V power supply, the 2 pin is connected to the "-" of the lower port of the second branch feeder switch, and the 1 pin is connected through the resistor R2. The "+" at the lower port of the second branch feeder switch; the third branch, the P12 pin of MSP430F2013 is grounded through the resistor R9 and connected to the 3 pin of the optocoupler PS2505 U3, the 4 pin of U3 is connected to the 3.3V power supply, and the 2 pin is the third branch The "-" of the lower port of the feeder switch of the first branch is connected to the "+" of the lower port of the third branch feeder switch through the resistor R3; the fourth road, the P13 pin of the MSP430F2013 is grounded through the resistor R10 and connected to the 3 pin of the optocoupler PS2505 U4 Connected, pin 4 of U4 is connected to 3.3V power supply, pin 2 is connected to "-" at the lower port of the fourth branch feeder switch, and pin 1 is connected to "+" at the lower port of the fourth branch feeder switch through resistor R4; the fifth road, The P14 pin of MSP430F2013 is grounded through the resistor R11 and connected to the 3 pin of the optocoupler PS2505 U5, the 4 pin of U5 is connected to the 3.3V power supply, the 2 pin is connected to the "-" of the lower port of the fifth branch feeder switch, and the 1 pin is connected to the power supply through the resistor R5 The "+" at the lower port of the fifth branch feeder switch; the sixth branch, the P15 pin of MSP430F2013 is grounded through the resistor R12 and connected to the 3 pin of the optocoupler PS2505 U6, the 4 pin of U6 is connected to the 3.3V power supply, and the 2 pin is connected to the sixth The "-" at the lower port of the feeder switch of the branch circuit, and the "+" at the lower port of the sixth branch feeder switch through the resistor R6 on pin 1.

Claims (4)

1. direct supply feeder switch device for dynamically detecting, it is characterized in that: direct supply feeder switch device for dynamically detecting is made up of main monitoring unit, a plurality of switching value module and a remote monitoring device, main monitoring unit comprises two RS485 interfaces, link to each other with the remote monitoring device by a RS485 interface, another RS485 interface links to each other with each switching value module respectively by its RS485 interface bus; Each switching value module is connected in each feeder switch end opening in the straight-flow system to be measured.

2. direct supply feeder switch device for dynamically detecting according to claim 1, it is characterized in that: described main monitoring unit mainly comprises microprocessor U1, two RS485 interface U2, U3 and intelligent display terminal U4, the model of U1 is ATMEGA128L8AI, U2, the model of U3 is ADM2483, the model of U4 is DMT64480T056, U2,1 pin of U3 meets VCC, 2 of U2 and U3, meet GND after the 8 pin parallel connections, 7 pin of U2 and U3 all meet VCC, 3 pin of U2 connect 59 pin of U1, connect 60 pin of U1 after 4 pin of U2 and the 5 pin parallel connections, 6 pin of U2 connect 61 pin of U1,3 pin of U3 connect 2 pin of U1, connect 4 pin of U1 after 4 pin of U3 and the 5 pin parallel connections, 6 pin of U3 connect 3 pin of U1, the GND pin ground connection of U4, the RX pin of U4 connects 28 pin of U1, the TX pin of U4 connects 27 pin of U1,20 pin of U1 R1 in parallel and C1, another termination VCC of R1, another termination GND of C1,22 of U1, ground connection after the 53 pin parallel connections, 21 of U1, meet VCC after the 52 pin parallel connections, at 23 of U1, be connected with Y1 between 24 pin, two ends at Y1 are connected with C2 and C3 respectively, the other end of C2 and C3 ground connection in parallel.

3. direct supply feeder switch device for dynamically detecting according to claim 1 is characterized in that: the feeder switch that described switching value module detects is 6 the tunnel.

4. direct supply feeder switch device for dynamically detecting according to claim 3, it is characterized in that: described switching value module comprises MSP430F2013 single-chip microcomputer and the RS485 interface that model is ADM2483, and MSP430F2013 single-chip microcomputer VSS pin is connected with ground wire; The VCC pin connects the 3.3V high level; The RST pin connects the 3.3V high level by resistance R 13 and finishes the electrification reset function; The VDD1 pin of 485 interface ADM2483 connects the 3.3V power supply, GND1 pin ground connection, and the RXO pin is connected with the P26 pin of MSP430F2013, and the TXI pin is connected with the P17 pin of MSP430F2013, and RE, DE pin short circuit link to each other with the P27 pin of MSP430F2013; The A of ADM2483, B, VDD2, GND2 pin connect the RS485 bus of 485 interfaces, and constitute 485 order circuits; The switching value input circuit has six the tunnel, and each road all is a voltage of gathering each feeder switch end opening in the straight-flow system to be measured by optocoupler; The first via, the P10 pin of MSP430F2013 links to each other by resistance R 7 ground connection and with 3 pin of optocoupler PS2505 U1,4 pin of U1 connect the 3.3V power supply, and 2 pin meet "-" of the first branch road feeder switch end opening, and 1 pin meets "+" of the first branch road feeder switch end opening by resistance R 1; The second the tunnel, the P11 pin of MSP430F2013 links to each other by resistance R 8 ground connection and with 3 pin of optocoupler PS2505 U2,4 pin of U2 connect the 3.3V power supply, and 2 pin meet "-" of the second branch road feeder switch end opening, and 1 pin meets "+" of the second branch road feeder switch end opening by resistance R 2; Third Road, the P12 pin of MSP430F2013 links to each other by resistance R 9 ground connection and with 3 pin of optocoupler PS2505 U3, and 4 pin of U3 connect the 3.3V power supply, "-" of 2 pin the 3rd branch road feeder switch end opening, 1 pin meets "+" of the 3rd branch road feeder switch end opening by resistance R 3; The four the tunnel, the P13 pin of MSP430F2013 links to each other by resistance R 10 ground connection and with 3 pin of optocoupler PS2505 U4,4 pin of U4 connect the 3.3V power supply, and 2 pin meet "-" of the 4th branch road feeder switch end opening, and 1 pin meets "+" of the 4th branch road feeder switch end opening by resistance R 4; The five the tunnel, the P14 pin of MSP430F2013 links to each other by resistance R 11 ground connection and with 3 pin of optocoupler PS2505 U5,4 pin of U5 connect the 3.3V power supply, and 2 pin meet "-" of the 5th branch road feeder switch end opening, and 1 pin meets "+" of the 5th branch road feeder switch end opening by resistance R 5; The six the tunnel, the P15 pin of MSP430F2013 links to each other by resistance R 12 ground connection and with 3 pin of optocoupler PS2505 U6,4 pin of U6 connect the 3.3V power supply, and 2 pin meet "-" of the 6th branch road feeder switch end opening, and 1 pin meets "+" of the 6th branch road feeder switch end opening by resistance R 6.

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