CN206115241U - Permanent magnetism switch intelligent control ware with PLC realization - Google Patents

Abstract

An intelligent permanent magnet switch controller realized by PLC belongs to the technical field of 10KV permanent magnet switch opening and closing control loops, and in particular relates to an intelligent permanent magnet switch controller realized by PLC. The utility model provides an intelligent permanent magnet switch controller realized by PLC, which can significantly reduce the failure rate of products. The utility model includes PLC, energy storage and release diodes G1, G2, closing intermediate relays HJ1, HJ2 and tripping intermediate relays TJ1, TJ2, and the main point of the structure is that one end of the control end of HJ1 is connected to the positive pole of the first power supply through the closing contact Y4 output by the PLC. , the other end is connected to the negative pole of the first power supply; one end of the HJ2 control terminal is connected to the closing coil through the PLC output to connect the energy storage release diode loop contact Y5 to the positive pole of the first power supply, and the other end is connected to the negative pole of the first power supply; TJ1 control terminal One end is connected to the positive pole of the first power supply through the trip contact Y6 output by the PLC.

Description

The Intelligent Controller of Permanent Magnet Switch Realized by PLC

technical field

The utility model belongs to the technical field of a 10KV permanent magnet switch opening and closing control circuit, in particular to an intelligent controller of a permanent magnet switch realized by PLC.

Background technique

At present, many 10KV lines of 66KV substations use a large number of permanent magnet mechanism switches [permanent magnet holding, electronically controlled electromagnetic operating mechanism]. The permanent magnet mechanism switches have the advantages of simple mechanical structure, not easy to damage, durable, and low driving power. However, its shortcoming is that the tripping and closing circuit shares one coil. The relay protection device connected to the switch tripping and closing circuit needs to output tripping and closing commands, and it is impossible to directly connect the tripping and closing commands to the permanent magnet mechanism switch. On one of the coils, and the tripping and closing command can only stay on the tripping and closing coil for a short time. These characteristics must use an intelligent controller to realize the connection between the protection device and the switch mechanism coil. When the original intelligent controller is damaged, The switch cannot perform opening and closing operations, and a PLC programmable controller is used to carry out a program design in order to realize the connection of the tripping and closing circuit between the switch and the protection, and realize the opening and closing needs of the switch.

The technical problem to be solved by the utility model permanent magnet switch intelligent controller is.

1. The tripping and closing pulse output time should not be too long or too short, and it will be automatically released after the tripping and closing task is completed.

2. Complete the automatic switching of tripping and closing commands through the automatic control of the secondary circuit.

3. The charging circuit of the closing capacitor is canceled, and the switching of the closing circuit is realized by the PLC programmable controller, and the output time of the closing command is designed to be reasonable.

The principle description of the existing permanent magnet switch mechanism.

1) The existing controller is an intermediate interface conversion device connected between the tripping and closing switch at the protection exit and the switch coil. The tripping and closing command issued by the protection upstairs first starts the tripping and closing intermediate relay in the switch cabinet, and the tripping and closing relay Then input the empty contact of the tripping and closing relay to the controller. In addition to the opening of the tripping and closing empty contact just now, the controller also obtains the opening auxiliary signal that the switch is in the opening position + working position or + test position.

2) The function of the controller is as long as it is.

Make the tripping and closing command output to the permanent magnet switch cut off immediately after the tripping and closing task is completed.

After the tripping and closing command is retracted, the switch coil cannot get a reverse electromagnetic signal, which makes the switch rebound.

3) The permanent magnet switch has only one coil, and it closes when the left terminal is positively charged and the right terminal is negatively charged; it is opened when the right terminal is positively charged and the left terminal is negatively charged.

4) When the permanent magnet switch receives the trip and close command, the switch fails to complete the trip and close task, and the trip and close pulse should be automatically interrupted.

5) The tripping and closing command should be output by the contact of the high-capacity intermediate relay.

Contents of the invention

The utility model aims at the above problems, and provides a hardware basis of a permanent magnet switch intelligent controller realized by PLC, which can significantly reduce the product failure rate.

In order to achieve the above object, the utility model adopts the following technical scheme. The utility model includes PLC, energy storage and release diodes G1, G2, closing intermediate relays HJ1, HJ2 and tripping intermediate relays TJ1, TJ2. The closing contact Y4 output by the PLC is connected to the positive pole of the first power supply, and the other end is connected to the negative pole of the first power supply.

One end of the control end of HJ2 is connected to the positive pole of the first power supply through the connection point Y5 of the closing coil outputted by the PLC, and the second end is connected to the negative pole of the first power supply.

One end of the TJ1 control end is connected to the positive pole of the first power supply through the trip contact Y6 output by the PLC, and the other end is connected to the negative pole of the first power supply.

One end of the control terminal of TJ2 is connected to the positive pole of the first power supply through the connection point Y5 of the energy storage release diode circuit output by the PLC, and the other end is connected to the negative pole of the first power supply.

One end of the first normally open contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the opening and closing coil A end through the first normally closed contact of the controlled end of TJ1.

One end of the first normally closed contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the opening and closing coil B end through the first normally open contact of the controlled end of TJ1.

One end of the second normally closed contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the opening and closing coil A end through the second normally open contact of the controlled end of TJ1.

One end of the second normally open contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the B end of the opening and closing coil through the second normally closed contact of the controlled end of TJ1.

One end of the first normally open contact of the controlled end of HJ2 is connected to the negative pole of G1, and the other end is connected to the opening and closing coil A end through the first normally closed contact of the controlled end of TJ2.

One end of the first normally closed contact of the controlled end of HJ2 is connected to the negative pole of G1, and the other end is connected to the B end of the opening and closing coil through the first normally open contact of the controlled end of TJ2.

One end of the second normally closed contact of the controlled end of HJ2 is connected to the positive pole of G2, and the other end is connected to the A end of the opening and closing coil through the second normally open contact of the controlled end of TJ2.

One end of the second normally open contact of the controlled end of HJ2 is connected to the positive pole of G2, and the other end is connected to the B end of the opening and closing coil through the second normally closed contact of the controlled end of TJ2.

The negative pole of G2 is connected to the positive pole of G1, and the A terminal and the B terminal are the two ends of the same opening and closing coil.

The signal input port of the PLC is respectively connected with the auxiliary signal terminal of the trip position of the permanent magnet switch input from the outside, the closing signal terminal of the external input, and the opening signal terminal of the external input.

As a preferred solution, the PLC of the utility model adopts NAiS FPC1-16 PLC.

As another preferred solution, the closing intermediate relay and the tripping intermediate relay of the utility model are 200V DC intermediate relays.

As another preferred solution, the positive pole of the first power supply described in the present invention is +24V, the negative pole of the first power supply is -24V; the positive pole of the second power supply is +220V, and the negative pole of the second power supply is -220V.

Secondly, the withstand voltage of the energy storage and release diode described in the utility model is 220 volts.

The utility model has beneficial effects.

The utility model realizes switching of opening and closing circuits through the cooperation of the closing intermediate relay, the tripping intermediate relay and the PLC programmable controller.

The utility model adopts PLC to automatically disconnect the tripping circuit when the closing circuit is connected, and automatically disconnect the closing circuit when the tripping circuit is connected.

The circuit of the utility model is designed with an energy release circuit in the transition process of the inductance coil (that is, the tripping and closing coil).

The utility model does not use the capacitor energy storage method to close the switch, and uses the relay contact combined with the PLC programmable controller to switch the polarity of the tripping and closing coil, so that the product is not easy to break down.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. The scope of protection of the utility model is not limited to the expression of the following content.

Fig. 1-1, 1-2 is the ladder diagram of the utility model PLC programmable controller.

Fig. 2 is the circuit diagram of the intermediate relay for tripping and closing conversion of the utility model.

Fig. 3 is a circuit diagram of the tripping and closing outlet of the utility model.

Fig. 4 is a circuit diagram of energy storage and release of the tripping and closing coils of the utility model.

Fig. 5 is a schematic structure diagram of the utility model PLC programmable controller.

detailed description

As shown in the figure, the utility model includes PLC, energy storage and release diodes G1, G2, closing intermediate relays HJ1, HJ2 and tripping intermediate relays TJ1, TJ2, and one end of the HJ1 control terminal is connected to the first power supply through the closing contact Y4 output by the PLC. The positive pole is connected, and the other end is connected with the negative pole of the first power supply.

One end of the control end of HJ2 is connected to the positive pole of the first power supply through the connection point Y5 of the closing coil outputted by the PLC, and the second end is connected to the negative pole of the first power supply.

One end of the TJ1 control end is connected to the positive pole of the first power supply through the trip contact Y6 output by the PLC, and the other end is connected to the negative pole of the first power supply.

One end of the control terminal of TJ2 is connected to the positive pole of the first power supply through the connection point Y5 of the energy storage release diode circuit output by the PLC, and the other end is connected to the negative pole of the first power supply.

One end of the first normally open contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the opening and closing coil A end through the first normally closed contact of the controlled end of TJ1.

One end of the first normally closed contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the opening and closing coil B end through the first normally open contact of the controlled end of TJ1.

One end of the second normally closed contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the opening and closing coil A end through the second normally open contact of the controlled end of TJ1.

One end of the second normally open contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the B end of the opening and closing coil through the second normally closed contact of the controlled end of TJ1.

One end of the first normally open contact of the controlled end of HJ2 is connected to the negative pole of G1, and the other end is connected to the opening and closing coil A end through the first normally closed contact of the controlled end of TJ2.

One end of the first normally closed contact of the controlled end of HJ2 is connected to the negative pole of G1, and the other end is connected to the B end of the opening and closing coil through the first normally open contact of the controlled end of TJ2.

One end of the second normally closed contact of the controlled end of HJ2 is connected to the positive pole of G2, and the other end is connected to the A end of the opening and closing coil through the second normally open contact of the controlled end of TJ2.

One end of the second normally open contact of the controlled end of HJ2 is connected to the positive pole of G2, and the other end is connected to the B end of the opening and closing coil through the second normally closed contact of the controlled end of TJ2.

The negative pole of G2 is connected to the positive pole of G1, and the A terminal and the B terminal are the two ends of the same opening and closing coil.

The signal input port of the PLC is respectively connected with the auxiliary signal terminal of the trip position of the permanent magnet switch input from the outside, the closing signal terminal of the external input, and the opening signal terminal of the external input.

The PLC adopts NAiS FPC1-16 PLC.

The closing intermediate relay and the tripping intermediate relay are 200V DC intermediate relays.

The positive pole of the first power supply is +24V, the negative pole of the first power supply is -24V; the positive pole of the second power supply is +220V, and the negative pole of the second power supply is -220V.

The withstand voltage of the energy storage and release diode is 220 volts.

The ladder diagram of the PLC may include an externally input trip position auxiliary contact X1, internal expansion intermediate relays R0 and R1 of the position contacts, and trip position contact expansion intermediate relays Y0 and Y1 of output contacts.

External input closing contact X4, external input opening contact X6, closing command delay time relay T3, closing command output Y4, closing command self-holding internal relay R4, closing command self-holding output intermediate relay Y5, Closing command output time time relay T4.

Opening command delay time relay T5, opening command output Y6, opening command self-holding internal relay R6, opening command self-holding output intermediate relay Y7, tripping command output time relay T6.

The delay time relay T1 that disconnects the trip circuit when the closing command appears, the internal relay R2 that disconnects the trip circuit when the closing command appears, and the external output relay Y2 that disconnects the trip circuit when the closing command appears, and when the tripping command appears Open the delay time relay T2 of the closing circuit, open the internal relay R3 of the closing circuit when the trip command appears, and open the external output relay Y3 of the closing circuit when the trip command appears.

Line 1 of the ladder diagram of the PLC is: the left end R1 is a normally open switch, and the right end R0 and Y0 are connected in parallel.

Line 2 of the PLC ladder diagram is: left end X1, right end R1, Y1 connected in parallel.

Line 3 of the PLC ladder diagram is: left end X4, right end TMR 3 K 2.

Line 4 of the ladder diagram of the PLC is: the left end time relay T3 normally open switch, R1 normally open switch, R2 normally closed switch are connected in series, and the right end Y4.

Line 5 of the PLC ladder diagram is: the left end R4 normally open switch is connected in series with the time relay T4 normally closed switch and then connected in parallel with Y4, and the right end R4 and Y5 are connected in parallel.

Row 6 of the PLC ladder diagram is: R4 normally open switch at the left end, TMX 4 K 4 at the right end.

Line 7 of the PLC ladder diagram is: left end X6, right end TMR 5 K 5.

Line 8 of the ladder diagram of the PLC is: the left end time relay T5 normally open switch, R0 normally open switch, R3 normally closed switch are connected in series, and the right end Y6.

Line 9 of the PLC ladder diagram is: the left end R6 normally open switch is connected in series with the time relay T6 normally closed switch and then connected in parallel with Y6, and the right end R6 and Y7 are connected in parallel.

Line 10 of the PLC ladder diagram is: R6 normally open switch at the left end, TMX 6 K 20 at the right end.

Line 11 of the PLC ladder diagram is: the left end X4, R1 normally open switches are connected in series, and the right end TMX 1 K 2.

Line 12 of the ladder diagram of the PLC is: the left end X6, R0 normally open switches are connected in series, and the right end TMX 2 K 2.

Line 13 of the PLC ladder diagram is: the left end R2 normally open switch and R1 normally open switch are connected in series with the time relay T1 normally open switch, and the right end Y2 and R2 are connected in parallel.

Line 14 of the ladder diagram of the PLC is: the left end R3 normally open switch, R0 normally open switch are connected in series and connected with the time relay T2 normally open switch in parallel, and the right end Y3 and R3 are connected in parallel.

TMX means 0.1 second unit time relay; TMR means 0.01 second unit time relay, K means decimal; the number after TMX or TMR means the serial number of the time relay, and the number after K means the time multiplier.

Figure 1 The main functions of the ladder diagram.

1) The pulse time of each tripping and closing is not more than 0.2 seconds, and the tripping and closing circuit is automatically disconnected after 0.2 seconds.

2) The closing pulse can only be output after 20 milliseconds each time the PLC is powered on, and the trip pulse can only be output after 50 milliseconds.

3) In order to prevent the tripping and closing commands from existing simultaneously, when designing the circuit, the closing normally open contact is connected in series with the opening normally closed contact or vice versa.

4) When the circuit considers manual closing of the faulty line, the switch has just completed the closing task after receiving the closing order, and immediately receives the tripping order. Before the tripping pulse is sent out, the closing circuit is disconnected first, and then the electromagnetic storage energy of the closing coil is discharged to the diode for 0.4 seconds before the tripping circuit is opened. The closing energy stored in the closing coil of the permanent magnet mechanism can be well released by the diode to prepare for subsequent tripping, and at the same time prevent the contacts of the closing intermediate relay from being burned due to arcing. The design of the trip circuit considers the cooperation with the automatic reclosing time of 3 seconds, and gives the trip coil energy storage and release time of 2 seconds. This design can also make the protection escape the self-starting current when the line is powered.

5) Each trip and close, when the trip and close are unsuccessful (the auxiliary contact of the switch is not switched), the switch will automatically withdraw the command after 0.2 seconds after the switch receives the trip and close command, and keep the circuit in this state all the time. At this time, only by disconnecting the DC of the PLC device and then re-supplying the power, the program can return to the initial state. When the tripping and closing is successful (the switch auxiliary contact has been converted), the above problems do not exist.

6) Program installation uses the normally closed auxiliary contact design of the switch.

The above is the program ladder diagram of the PLC programmable controller. TMX means 0.1 second unit time relay; TMR means 0.01 second unit time relay, K means decimal. [TMX 6 K 20] means that the timing of the T6 time relay is 20*0.1=2 seconds. R is the internal export intermediate relay; Y is the external output intermediate relay; X is the PLC input terminal.

In Fig. 2: Y4 and Y6 are the closing and tripping contacts of the PLC output respectively; Y5 and Y7 are the circuit contacts for connecting the energy storage release diode for the tripping and closing coil. Y5 (Y7) and Y4 (Y6) act at the same time, and Y5 (Y7) returns later than Y4 (Y6) (in Figure 1-1, the symbol In the programmable controller ladder diagram, it is a normally open contact; is a normally closed contact; It is a high internal resistance intermediate relay.

1) When T3 acts, R1 acts, and R2 does not act, start Y4.

2) Y4 activates R4 and Y5, and at the same time, the normally open contact of R4 and the normally closed contact of T4 form a holding circuit for Y5. After R4 and Y5 are activated, even if Y4 returns, it can still be used by the normally open contact of R4 and the normally closed contact of T4. R4 and Y5 continue to act, and only when T4 acts and its T4 normally closed contact is disconnected, can Y5 return.

That is, when Y4 returns, Y5 does not return immediately, and only when T4 also acts on Y5 will it return.

The action relationship between Y6 and Y7 is also the same. ), HJ1, HJ2, TJ1, TJ2 are 200V DC intermediate relays with at least two pairs of normally open contacts and two pairs of normally closed contact outputs.

It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solutions described in the embodiments of the utility model. Those of ordinary skill in the art should understand that they can still understand the utility model Modifications or equivalent replacements are carried out to achieve the same technical effect; as long as the needs of use are met, they are all within the protection scope of the present utility model.

Claims (5)

1. The permanent magnet switch intelligent controller realized by PLC, including PLC, energy storage and release diodes G1, G2, closing intermediate relays HJ1, HJ2 and tripping intermediate relays TJ1, TJ2, is characterized in that one end of HJ1 control terminal is output by PLC The closing contact Y4 is connected to the positive pole of the first power supply, and the other end is connected to the negative pole of the first power supply; One end of the control terminal of HJ2 is connected to the positive pole of the first power supply through the output of the PLC to provide connection to the closing coil of the energy storage release diode circuit Y5, and the other end is connected to the negative pole of the first power supply; One end of the TJ1 control terminal is connected to the positive pole of the first power supply through the trip contact Y6 output by the PLC, and the other end is connected to the negative pole of the first power supply; One end of the control terminal of TJ2 is connected to the positive pole of the first power supply through the connection point Y5 of the energy storage release diode circuit output by the PLC, and the other end is connected to the negative pole of the first power supply; One end of the first normally open contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the opening and closing coil A end through the first normally closed contact of the controlled end of TJ1; One end of the first normally closed contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the B end of the opening and closing coil through the first normally open contact of the controlled end of TJ1; One end of the second normally closed contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the opening and closing coil A end through the second normally open contact of the controlled end of TJ1; One end of the second normally open contact of the controlled end of HJ1 is connected to the positive pole of the second power supply, and the other end is connected to the B end of the opening and closing coil through the second normally closed contact of the controlled end of TJ1; One end of the first normally open contact of the controlled end of HJ2 is connected to the negative pole of G1, and the other end is connected to the opening and closing coil A end through the first normally closed contact of the controlled end of TJ2; One end of the first normally closed contact of the controlled end of HJ2 is connected to the negative pole of G1, and the other end is connected to the B end of the opening and closing coil through the first normally open contact of the controlled end of TJ2; One end of the second normally closed contact of the controlled end of HJ2 is connected to the positive pole of G2, and the other end is connected to the opening and closing coil A end through the second normally open contact of the controlled end of TJ2; One end of the second normally open contact of the controlled end of HJ2 is connected to the positive pole of G2, and the other end is connected to the B end of the opening and closing coil through the second normally closed contact of the controlled end of TJ2; The negative pole of G2 is connected to the positive pole of G1, and the A terminal and the B terminal are the two ends of the same opening and closing coil; The signal input port of the PLC is respectively connected with the auxiliary signal terminal of the trip position of the permanent magnet switch input from the outside, the closing signal terminal of the external input, and the opening signal terminal of the external input. 2. The permanent magnet switch intelligent controller realized with PLC according to claim 1 is characterized in that said PLC adopts NAiS FPC1-16 PLC. 3. The permanent magnet switch intelligent controller realized by PLC according to claim 1 is characterized in that the closing intermediate relay and the tripping intermediate relay are 200V DC intermediate relays. 4. The permanent magnet switch intelligent controller realized by PLC according to claim 1 is characterized in that the positive pole of the first power supply is +24V, the negative pole of the first power supply is -24V; the positive pole of the second power supply is +220V, the second The negative pole of the power supply is -220V. 5. The permanent magnet switch intelligent controller realized by PLC according to claim 1, characterized in that the withstand voltage of the energy storage and release diode is 220 volts.