Substation secondary circuit training operation platform

Abstract

A transformer substation secondary circuit training operation platform comprises a box body and an operation table installed on the upper end of the box body; a line protection device, a simulated circuit breaker device, an intelligent terminal, and a switch opening and closing handle are installed inside the box body; the backplane terminals of the line protection device, the simulated circuit breaker device, and the intelligent terminal are connected to the operation table by secondary wires; a wiring jack is arranged on the operation table, and a tripping input circuit module, a pressure input circuit module, a tripping circuit module, and a closing circuit module are arranged inside the operation table; the corresponding terminals in each module are led out from an internal circuit board to the corresponding positions in the circuit diagram on the operation panel; secondary maintenance personnel can use a test line on the operation panel to perform the overlapping work of the secondary circuit and the process layer network, so as to make the secondary maintenance personnel familiar with the on-site circuit connection and the process layer network connection.

Description

Technical Field

[0001] The invention relates to the technical field of transformer substation operation training, and in particular to a transformer substation secondary circuit training operation platform. Background Art

[0002] The electrical circuit formed by the interconnection of secondary equipment to monitor, control, adjust and protect the primary equipment is called the secondary circuit. The secondary circuit plays a vital role in the relay protection system. It can realize the control and monitoring of primary equipment such as circuit breakers and switch mechanisms. The secondary circuit is difficult to master. At present, secondary maintenance personnel are not familiar with the secondary circuit of the intelligent terminal of the smart substation and the networking mode of the process layer of the smart substation, which leads to the lack of improvement of the personnel's skill level and the long time of on-site defect handling. Summary of the invention

[0003] In order to solve the technical problems existing in the above technologies, it is necessary to provide a substation secondary circuit training operation platform.

[0004] A substation secondary circuit training operation platform comprises a box body and an operation table installed on the upper end of the box body; The box is equipped with a line protection device, a simulated circuit breaker device, an intelligent terminal, and a switch opening and closing handle; the backplane terminals of the line protection device, the simulated circuit breaker device, and the intelligent terminal are connected to the operating table with secondary wires; The operating table is provided with a wiring jack, and a tripping input circuit module, a pressure input circuit module, a tripping circuit module and a closing circuit module are arranged inside the operating table; the corresponding terminals in each module are led out from the internal circuit board to the corresponding position in the circuit diagram on the operating panel for the operator to perform wiring operations.

[0005] Preferably, the tripping and closing circuit entry module comprises: The positive end of AC contactor KM2 is connected to one end of terminal block terminal 4Q1D2, the other end of terminal block terminal 4Q1D2 is connected to one end of pressure monitoring relay contact 11YJJ, the other end of pressure monitoring relay contact 11YJJ is connected to one end of terminal block terminal 4Q1D6, the other end of terminal block terminal 4Q1D6 is connected to the positive end of AC contactor; two pressure monitoring relay contacts 11YJJ are connected in parallel. Terminal block terminal 4C1D14 is connected to terminal block terminal 4Q1D6 and terminal block terminal 4C1D15 respectively, terminal block terminal 4C1D14 is also connected to one end of pressure plate terminal 4C1LP4, the other end of pressure plate terminal 4C1LP4 is connected to one end of reclosing switch output contact 4H, the other end of reclosing switch output contact 4H is connected in series with terminal block terminal 4C1D19, reclosing switch relay 1ZHJ, reclosing switch relay 2ZHJ and resistor R in sequence, and then connected to one end of terminal block terminal 4Q1D29, the other end of terminal block terminal 4Q1D29 is connected to the negative end of AC contactor KM2; Terminal block terminal 4C2D1 is respectively connected to the positive end of AC contactor KM2, terminal block terminal 4C2D2, and one end of the remote control of switching handle 4QK. The other end of terminal block terminal 4C2D2 is connected to one end of the five-protection locking contact 4BS. The other end of the five-protection locking contact 4BS is connected to terminal block terminal 4C2D4. Terminal block terminal 4C2D4 is respectively connected to one end of the synchronous hand-on and forced hand-on of switching handle 4QK; the other end of the synchronous hand-on of switching handle 4QK is connected to terminal block terminal 4C2D12, and terminal block terminal 4C2D12 is also connected to terminal block terminal 4C2D 13 connection; the other end of the switching handle 4QK remote control is connected to the terminal block terminal 4C2D6, the terminal block terminal 4C2D6 is also connected to one end of the pressure plate terminal 4C1LP8, the other end of the pressure plate terminal 4C1LP8 is connected to the terminal block terminal 4C2D13, the terminal block terminal 4C2D13 is also connected in series with the remote tripping and remote closing output contact CJ08, the terminal block terminal 4C2D10, the terminal block terminal 4Q1D11, the pressure monitoring relay contact 3YJJ, the manual closing relay 1SHJ, the manual closing relay 2SHJ, the resistor R, and then connected to the terminal block terminal 4Q1D29; The other end of the forced manual switching handle 4Q is respectively connected to the hand-on and hand-off ends of the operating handle 4KK, the other end of the hand-on operating handle 4KK is connected to the terminal block terminal 4Q1D12, the other end of the terminal block terminal 4Q1D12 is connected in series with the pressure monitoring relay contact 21YJJ and then connected between the pressure monitoring relay contact 3YJJ and the hand-on relay 1SHJ; Terminal block terminal 4C2D6 is also connected in series with pressure plate terminal 4C1LP7, remote trip and remote closing output contact CJ07, terminal block terminal 4C2D9, terminal block terminal 4Q1D14, manual trip relay STJA, manual trip relay STJB, manual trip relay STJC, resistor R, and then connected to terminal block terminal 4Q1D29; terminal block terminal 4Q1D14 is also connected to terminal block terminal 4Q1D15, and terminal block terminal 4Q1D15 is also connected to the other end of operating handle 4KK manual trip; after closing, one end of relay HHJ is connected between terminal block terminal 4Q1D11 and pressure monitoring relay contact 3YJJ, and the other end is connected to terminal block terminal 4Q1D29 in series with resistor R; after closing, one end of the relay is also connected between terminal block terminal 4Q1D14 and manual trip relay STJA, and the other end is connected to terminal block terminal 4Q1D29 in series with resistor R; One end of terminal block terminal 4C1D1 is connected to the positive end of AC contactor KM2, and the other end is connected in series with photodiode D1, trip relay 11TJF, trip relay 12TJF, trip relay 13TJF, and resistor R and then connected to terminal block terminal 4Q1D29; the positive pole of photodiode D1 is connected in parallel with photodiode D2, the negative pole of photodiode D2 is connected to the first end of optocoupler OC1, the second end of optocoupler OC1 is connected to terminal block terminal 4Q1D29, the third end of optocoupler OC1 is connected to chip CPU, and the fourth end of optocoupler OC1 is grounded.

[0006] Preferably, the reclosing switch outlet contact 4H includes: the two ends of the A contact are respectively connected to the pressure plate terminal 4C1LP4 and the terminal block terminal 4C1D18, and the terminal block terminal 4C1D18 is connected to the terminal block terminal 4C1D19; the two ends of the B contact are respectively connected to the pressure plate terminal 4C1LP4 and the terminal block terminal 4C1D21, and the terminal block terminal 4C1D21 is connected to the terminal block terminal 4C1D18; the two ends of the C contact are respectively connected to the pressure plate terminal 4C1LP4 and the terminal block terminal 4C1D24, and the terminal block terminal 4C1D24 is connected to the terminal block terminal 4C1D21.

[0007] Preferably, in the tripping and closing input circuit, the pressure monitoring relay contacts 11YJJ, 3YJJ, and 21YJJ are respectively taken from the pressure monitoring relays 11YJJ, 3YJJ, and 21YJJ in the pressure input circuit module.

[0008] Preferably, the pressure input circuit module comprises: Terminal block terminal 4Q1D2 is connected to the positive end of AC contactor KM2; one end of terminal block terminal 4Q1D4 is connected to the positive end of AC contactor KM2, and the other end is connected in series with terminal block terminal 4Q1D17, resistor R, pressure monitoring relay 21YJJ, resistor R, and then connected to terminal block terminal 4Q1D29, and terminal block terminal 4Q1D29 is also connected to the negative end of AC contactor KM2; one end of terminal block terminal 4Q1D21 is connected to the input end of pressure monitoring relay 21YJJ, and the other end is connected to the negative end of AC contactor KM2; Terminal block terminal 4Q1D18 is connected to terminal block terminal 4Q1D17, and terminal block terminal 4Q1D18 is also connected in series with resistor R, pressure monitoring relay 3YJJ, and resistor R in sequence, and then connected to terminal block terminal 4Q1D29; one end of terminal block terminal 4Q1D22 is connected to the input end of pressure monitoring relay 3YJJ, and the other end is connected to the negative end of AC contactor KM2; Terminal block terminal 4Q1D19 is connected to terminal block terminal 4Q1D18, and terminal block terminal 4Q1D19 is also connected in series with resistor R, pressure monitoring relay 11YJJ, and resistor R in sequence, and then connected to terminal block terminal 4Q1D29; one end of terminal block terminal 4Q1D23 is connected to the input end of pressure monitoring relay 11YJJ, and the other end is connected to the negative end of AC contactor KM2; pressure monitoring relay contact 4YJJ is connected in parallel to pressure monitoring relay 11YJJ; Terminal block terminal 4Q1D25 is connected to the positive terminal of AC contactor KM2. Terminal block terminal 4Q1D25 is also connected in series with resistor R, pressure monitoring relay 4YJJ, resistor R and then connected to terminal block terminal 4Q1D29; terminal block terminal 4Q1D26 is connected to the input end of pressure monitoring relay 4YJJ.

[0009] Preferably, the pressure is opened in the loop module, and the pressure monitoring relay contact 4YJJ opens the pressure monitoring relay 4YJJ in the loop module.

[0010] Preferably, the trip circuit module comprises: Terminal block terminal 4Q1D2 is connected to the positive end of AC contactor KM2, and terminal block terminal 4Q1D2 is also connected in series with closing relay HWJA, resistor R, resistor R, and terminal block terminal 4K1D1 in sequence; the first end of optocoupler OC2 is connected to the output end of closing relay HWJA, the second end of optocoupler OC2 is connected between two resistors R, the third end of optocoupler OC2 is connected to CPU, and the fourth end is grounded; terminal block terminal 4Q1D5 is connected to the positive end of AC contactor KM2, and terminal block terminal 4Q1D5 is also connected in series with tripping relay contact 11TJF, tripping holding relay TBJA, terminal block terminal 4K1D2, and one end of circuit breaker tripping coil phase A, and the other end of circuit breaker tripping coil phase A is connected to the negative end of AC contactor KM2, and terminal block terminal 4K1D2 is connected to terminal block terminal 4K 1D1 is connected; one end of the tripping and holding relay contact TBJA is connected to the terminal block terminal 4Q1D2, and the other end is connected to the input end of the tripping and holding relay TBJA; the manual tripping relay contact STJA is connected in parallel to the two ends of the tripping relay contact 11TJF; the two ends of the pressure monitoring relay contact 11YJJ are respectively connected to the terminal block terminal 4Q1D5 and the terminal block terminal 4Q1D2, and the two ends of the pressure monitoring relay contact 11YJJ are also connected in parallel with the pressure monitoring relay contact 11YJJ; the tripping A contact is connected to the terminal block terminal 4Q1D5, and the tripping A contact is also connected in series with the pressure plate terminal 4C1LP1 and the terminal block terminal 4C1D4, and the terminal block terminal 4C1D5 is respectively connected to the terminal block terminal 4C1D4 and the input end of the tripping and holding relay TBJA; the terminal block terminal 4Q1D29 is connected to the negative end of the AC contactor KM2; Terminal block terminal 4Q1D2 is also connected in series with closing relay HWJB, resistor R, resistor R, and terminal block terminal 4K1D4 in sequence; the first end of the optical coupler OC3 is connected to the output end of the closing relay HWJB, the second end of the optical coupler OC3 is connected between the two resistors R, the third end of the optical coupler OC3 is connected to the CPU, and the fourth end is grounded; terminal block terminal 4Q1D5 is also connected in series with trip relay contact 12TJF, trip holding relay TBJB, terminal block terminal 4K1D5, one end of the circuit breaker trip coil B phase, and the other end of the circuit breaker trip coil B phase is connected to the AC contactor The negative end of KM2 is connected, and the terminal block terminal 4K1D5 is connected to the terminal block terminal 4K1D4; one end of the tripping and holding relay contact TBJB is connected to the terminal block terminal 4Q1D2, and the other end is connected to the input end of the tripping and holding relay TBJB; the manual tripping relay contact STJB is connected in parallel to the two ends of the tripping relay contact 12TJF; the tripping B contact is connected to the terminal block terminal 4Q1D5, and the tripping B contact is also connected in series with the pressure plate terminal 4C1LP2 and the terminal block terminal 4C1D7, and the terminal block terminal 4C1D8 is respectively connected to the terminal block terminal 4C1D7 and the input end of the tripping and holding relay TBJB; Terminal block terminal 4Q1D2 is also connected in series with closing relay HWJC, resistor R, resistor R, and terminal block terminal 4K1D7 in sequence; the first end of optocoupler OC4 is connected to the output end of closing relay HWJC, the second end of optocoupler OC4 is connected between two resistors R, the third end of optocoupler OC4 is connected to CPU, and the fourth end is grounded; terminal block terminal 4Q1D5 is also connected in series with trip relay contact 13TJF, trip holding relay TBJC, terminal block terminal 4K1D8, one end of circuit breaker trip coil C phase, and the other end of circuit breaker trip coil C phase is connected to AC contactor K The negative end of M2 is connected, terminal block terminal 4K1D8 is connected to terminal block terminal 4K1D7; one end of the tripping and holding relay contact TBJC is connected to terminal block terminal 4Q1D2, and the other end is connected to the input end of the tripping and holding relay TBJC; the manual tripping relay contact STJC is connected in parallel to the two ends of the tripping relay contact 13TJF; the tripping C contact is connected to terminal block terminal 4Q1D5, and the tripping C contact is also connected in series with the pressure plate terminal 4C1LP3 and the terminal block terminal 4C1D10, and the terminal block terminal 4C1D11 is respectively connected to the terminal block terminal 4C1D10 and the input end of the tripping and holding relay TBJC.

[0011] Preferably, in the tripping circuit module, the pressure monitoring relay contact 11YJJ is taken from the pressure monitoring relay 11YJJ of the pressure input circuit module; the tripping holding relay contacts TBJA, TBJB, and TBJC are respectively taken from the tripping holding relays TBJA, TBJB, and TBJC in the tripping circuit module; and the tripping relay contacts 11TJF, 12TJF, and 13TJF are respectively taken from the tripping relays 11TJF, 12TJF, and 13TJF of the tripping and closing input circuit module.

[0012] Preferably, the closing circuit module includes: Terminal block terminal 4Q1D2 is connected to the positive end of AC contactor KM2. Terminal block terminal 4Q1D2 is also connected in series with jump relay TWJA, resistor R, resistor R, terminal block terminal 4K1D10, and circuit breaker A phase normally closed auxiliary contact DLA. The other end of circuit breaker A phase normally closed auxiliary contact DLA is connected to the negative end of AC contactor KM2. Terminal block terminal 4Q1D29 is connected to the negative end of AC contactor KM2. The first end of optocoupler OC5 is connected to the output end of jump relay TWJA. The second end of optocoupler OC5 is connected between two resistors R. The third end of optocoupler OC5 is connected to CPU, and the fourth end is grounded. Terminal block terminal 4Q1D6 is connected to the positive end of AC contactor KM2. Sub 4Q1D6 is also connected in series with the hand-closing relay contact 1SHJ-1, the closing holding relay HBJA, the terminal 4K1D11 of the terminal block, and one end of the closing coil phase A of the circuit breaker, and the other end of the closing coil phase A of the circuit breaker is connected to the negative end of the AC contactor KM2; the two ends of the pressure monitoring relay contact 11YJJ are respectively connected to the terminal 4Q1D2 of the terminal block and the terminal 4Q1D6 of the terminal block, and the two ends of the pressure monitoring relay contact 11YJJ are also connected in parallel with the pressure monitoring relay contact 11YJJ; the two ends of the closing holding relay contact HBJA are respectively connected to the terminal 4Q1D2 of the terminal block and the input end of the closing holding relay HBJA, and the reclosing relay contact 1ZHJ-1 is connected in parallel with the two ends of the hand-closing relay contact 1SHJ-1; Terminal block terminal 4Q1D2 is also connected in series with jump relay TWJB, resistor R, resistor R, terminal block terminal 4K1D14, circuit breaker B phase normally closed auxiliary contact DLB, the other end of circuit breaker B phase normally closed auxiliary contact DLB is connected to the negative end of AC contactor KM2, the first end of optocoupler OC6 is connected to the output end of jump relay TWJB, the second end of optocoupler OC6 is connected between two resistors R, the third end of optocoupler OC6 is connected to CPU, and the fourth end is grounded; terminal block Terminal 4Q1D6 is also connected in series with the hand-closing relay contact 1SHJ-2, the closing holding relay HBJB, the terminal block terminal 4K1D15, and one end of the closing coil B phase of the circuit breaker, and the other end of the closing coil B phase of the circuit breaker is connected to the negative end of the AC contactor KM2; the two ends of the closing holding relay contact HBJB are respectively connected to the terminal block terminal 4Q1D2 and the input end of the closing holding relay HBJB, and the reclosing relay contact 1ZHJ-2 is connected in parallel to the two ends of the hand-closing relay contact 1SHJ-2; Terminal block terminal 4Q1D2 is also connected in series with jump relay TWJC, resistor R, resistor R, terminal block terminal 4K1D18, and circuit breaker C phase normally closed auxiliary contact DLC. The other end of circuit breaker C phase normally closed auxiliary contact DLC is connected to the negative end of AC contactor KM2. The first end of optical coupler OC7 is connected to the output end of jump relay TWJC. The second end of optical coupler OC7 is connected between two resistors R. The third end of optical coupler OC7 is connected to CPU, and the fourth end is grounded. Terminal 4Q1D6 is also connected in series with the manual closing relay contact 2SHJ-1, the closing holding relay HBJC, the terminal block terminal 4K1D19, and one end of the circuit breaker closing coil phase C. The other end of the circuit breaker closing coil phase C is connected to the negative end of the AC contactor KM2; the two ends of the closing holding relay contact HBJC are respectively connected to the terminal block terminal 4Q1D2 and the input end of the closing holding relay HBJC, and the reclosing relay contact 2ZHJ-1 is connected in parallel to the two ends of the manual closing relay contact 2SHJ-1.

[0013] Preferably, in the closing circuit module, the pressure monitoring relay contact 11YJJ is taken from the pressure monitoring relay 11YJJ of the pressure input circuit module; the closing holding relay contacts HBJA, HBJB, and HBJC are respectively taken from the closing holding relays HBJA, HBJB, and HBJC of the closing circuit module; the manual closing relay contacts 1SHJ-1 and 1SHJ-2 are taken from the manual closing relay 1SHJ of the jump closing input circuit module, and the manual closing relay contact 2SHJ is taken from the manual closing relay 2SHJ of the jump closing input circuit module; the reclosing relay contacts 1ZHJ-1 and 1ZHJ-2 are taken from the reclosing relay 1ZHJ of the jump closing input circuit module, and the reclosing relay contact 2ZHJ is taken from the reclosing relay of the jump closing input circuit module.

[0014] Compared with the prior art, the substation secondary circuit training operation platform provided by the present invention comprises a box body and an operation table installed on the upper end of the box body; a line protection device, a simulated circuit breaker device, an intelligent terminal, and an opening and closing handle are installed inside the box body; the backplane terminals of the line protection device, the simulated circuit breaker device, and the intelligent terminal are connected to the operation table with secondary wires; a wiring jack is provided on the operation table, and a tripping input circuit module, a pressure input circuit module, a tripping circuit module, and a closing circuit module are arranged inside the operation table; the corresponding terminals in each module are led out from the internal circuit board to the corresponding positions in the circuit diagram on the operation panel; secondary maintenance personnel can use test lines on the operation panel to perform the splicing of secondary circuits and process layer networks, so as to make the secondary maintenance personnel familiar with the on-site circuit connection and the process layer network connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the tripping input circuit module, the pressure input circuit module, the tripping circuit module, and the closing circuit module of the present invention.

[0017] Figure 2 It is a circuit diagram of the tripping and closing opening loop module of the present invention.

[0018] Figure 3 It is a circuit diagram of the pressure input loop module of the present invention.

[0019] Figure 4 It is a circuit diagram of the tripping circuit module of the present invention.

[0020] Figure 5 It is a circuit diagram of the closing circuit module of the present invention.

[0021] Figure 6 It is a structural schematic diagram of the substation secondary circuit training operation platform of the present invention.

[0022] Figure 7 For the present invention Figure 1 Schematic diagram of the structure from another angle.

[0023] In the figure: box 01, line protection device 02, simulated circuit breaker device 03, intelligent terminal 04, opening and closing handle 05, wiring jack 06, universal wheel 07, inspection door 08, ventilation hole 81, handle 82, pull rod 09, operation table 10, tripping and closing opening circuit module 20, pressure opening circuit module 30, tripping circuit module 40, closing circuit module 50. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Please see Figure 6 , Figure 7The present invention provides a substation secondary circuit training operation platform, including a box body and an operation table installed on the upper end of the box body; a line protection device, a simulated circuit breaker device, an intelligent terminal, and a switch opening and closing handle are installed inside the box body; the backplane terminals of the line protection device, the simulated circuit breaker device, and the intelligent terminal are connected to the operation table with secondary wires; a wiring jack is provided on the operation table, and a tripping input circuit module, a pressure input circuit module, a tripping circuit module, and a closing circuit module are arranged inside the operation table; the corresponding terminals in each module are led out from the internal circuit board to the corresponding positions in the circuit diagram on the operation panel for the operator to perform wiring operations. Secondary maintenance personnel can use test lines on the operation panel to perform the overlap work of the secondary circuit and the process layer network, so as to make the secondary maintenance personnel familiar with the field circuit connection and the process layer network connection.

[0026] Among them, universal wheels are arranged at the bottom of the box, which can facilitate the movement of the entire operating platform. An inspection door is arranged on the back of the box, which can facilitate the inspection of the interior of the box. Ventilation holes are opened on the inspection door to allow the heat emitted from the box to flow out; the ventilation holes can be arranged in a grille-type structure. At the same time, in order to facilitate opening the inspection door, a handle is installed on the outside of the inspection door. In order to make it easier to grasp when moving the entire operating platform, a pull rod is arranged on the side of the box.

[0027] Operators can not only perform wiring operations and then conduct training tests on smart terminals based on each module, but also clearly and intuitively see the circuit connection relationship, action coordination relationship and action principle of each module during the test operation, thereby deepening the trainees' understanding of the smart terminal operation circuit test and improving the training effect. For example, the terminal block terminals, handle terminals, pressure plate terminals, five-protection locking terminals, etc. are led to the corresponding positions on the circuit diagram and made into jacks. The connections between the terminals are completed by trainees according to the drawings. Compared with the traditional training method of smart terminal group screens, the schematic diagram is directly designed on the test platform, which is convenient for trainees to understand and master the principles of the operating circuit, and have a clearer understanding of the contacts, relays, pressure plates and other components in the circuit. Trainees can practice wiring by themselves, which helps to understand the circuit function, troubleshoot circuit problems, improve the maintenance and defect handling level of smart terminals, and reduce the risk of on-site smart terminal operation.

[0028] See also Figure 2-5 , which are circuit diagrams of the tripping and closing input circuit module, the pressure input circuit module, the tripping circuit module and the closing circuit module respectively.

[0029] The following is an explanation of this scheme in conjunction with a specific protection test example: 1. Take protection clause A as an example (the same applies to clauses B and C) (1) Without pressure circuit like Figure 4The circuit diagram of the trip circuit module 40 shown in FIG. Figure 5 In the circuit diagram of the closing circuit module 50 shown in the figure, the terminal 4Q1D2 of the terminal block is short-circuited with the terminal 4Q1D5 of the terminal block, crossing the pressure circuit. The terminal 4K1D2 of the terminal block is connected to the simulated circuit breaker, and the pressure plate terminal 4C1LP1 pressure plate is put into operation, and the tripping contact A is closed, or the test line is short-circuited with the contacts 417 and 418 at both ends of the tripping contact A. The tripping and holding relay TBJA is started, and the normally open tripping and holding relay contact TBJA is closed, forming a self-holding circuit, completing the tripping of phase A. After phase A is tripped, the normally open contact DLA of the circuit breaker is opened, the tripping and holding relay TBJA returns, and the tripping and holding relay contact TBJA opens. Figure 5 At the same time, the normally closed contact of DLA is closed and the jump relay TWJA is activated.

[0030] (2) With pressure circuit like Figure 4 As shown, terminal block terminal 4Q1D2 is disconnected from terminal block terminal 4Q1D5, and the positive power of terminal block terminal 4Q1D2 needs to be connected to terminal block terminal 4Q1D5 through pressure monitoring relay contact 11YJJ.

[0031] 1) When the low pressure locking trip contact between terminal 4Q1D23 and terminal 4Q1D29 of the terminal block is open, the pressure monitoring relay 11YJJ relay can be operated, the normally open contact of the pressure monitoring relay contact 11YJJ is closed, the terminal 4Q1D2 of the terminal block is connected to the terminal 4Q1D5 of the terminal block, and the protection can normally trip A. When the low pressure locking trip contact between terminal 4Q1D23 and terminal 4Q1D29 of the terminal block is closed, the positive electricity passes through the terminal 4Q1D23 of the terminal block across the pressure monitoring relay 11YJJ, the pressure monitoring relay 11YJJ cannot be operated, the normally open contact of the pressure monitoring relay contact 11YJJ is opened, the terminal 4Q1D2 of the terminal block is not connected to the terminal 4Q1D5 of the terminal block, and the protection cannot trip A.

[0032] 2) When the pressure prohibited operation contact between terminal 4Q1D4 and terminal 4Q1D25 of the terminal block is closed, the pressure monitoring relay 4YJJ is actuated, the normally open contact of the pressure monitoring relay contact 4YJJ is closed, the positive electricity passes through the normally closed contact of the pressure monitoring relay contact 4YJJ and crosses the pressure monitoring relay 11YJJ, the pressure monitoring relay 11YJJ cannot be actuated, the normally open contact of the pressure monitoring relay contact 11YJJ is opened, the terminal block terminal 4Q1D2 and the terminal block terminal 4Q1D5 are not conductive, and the protection cannot trip A.

[0033] 2. Take Protection Agreement A as an example (the same applies to B and C) (1) Without pressure circuit like Figure 2 , 4As shown in Figure 5, the terminal block terminal 4Q1D2 is short-circuited with the terminal block terminal 4Q1D6 to cross the pressure circuit. The terminal block terminal 4K1D11 is connected to the simulated circuit breaker, the pressure plate terminal 4C1LP4 is put into operation, and the A contact is closed, or the test line is short-circuited to connect the contacts 423 and 424 at both ends of the A contact. Start the reclosing relays 1ZHJ and 2ZHJ. The reclosing relay contact 1ZHJ-1 is closed, and the normally open contact of the start-up holding relay contact HBJA is closed to form a self-holding circuit and complete the A phase closing. After the A phase is closed, the circuit breaker's DLA normally closed contact opens, the closing holding relay HBJA relay returns, and the closing holding relay contact HBJA opens. At the same time, the circuit breaker's DLA normally open contact closes, and the closing relay HWJA operates.

[0034] (2) With pressure circuit Terminal block terminal 4Q1D2 is disconnected from terminal block terminal 4Q1D6, and the positive current of 4Q1D2 needs to be connected to terminal block terminal 4Q1D6 through pressure monitoring relay contact 11YJJ; 1) When the low pressure lockout trip contact between terminal 4Q1D23 and terminal 4Q1D29 is open, the pressure monitoring relay 11YJJ can operate, the normally open contact of the pressure monitoring relay node 11YJJ is closed, the terminal 4Q1D2 of the terminal block is connected to the terminal 4Q1D6 of the terminal block, and the protection can be closed normally. When the low pressure lockout trip contact between terminal 4Q1D23 and terminal 4Q1D29 of the terminal block is closed, the positive electricity passes through the terminal 4Q1D23 across the pressure monitoring relay 11YJJ, the pressure monitoring relay 11YJJ cannot operate, the normally open contact of the pressure monitoring relay contact 11YJJ is opened, the terminal 4Q1D2 of the terminal block is not connected to the terminal 4Q1D6 of the terminal block, and the protection cannot trip.

[0035] 2) When the pressure prohibited operation contact between terminal 4Q1D4 and terminal 4Q1D25 of the terminal block is closed, the pressure monitoring relay 4YJJ is actuated, the normally open contact of the pressure monitoring relay contact 4YJJ is closed, the positive electricity passes through the normally closed contact of the pressure monitoring relay contact 4YJJ and crosses the pressure monitoring relay 11YJJ, the pressure monitoring relay 11YJJ cannot be actuated, the normally open contact of the pressure monitoring relay relay 11YJJ is opened, the terminal block terminal 4Q1D2 and the terminal block terminal 4Q1D6 are not conductive, and the protection cannot be closed A.

[0036] Among them, the circuit breaker closing coils are HQA, HQB, and HQC, and the circuit breaker tripping coils are TQA, TQB, and TQC.

[0037] It should be noted that the operations of other circuits are similar. The circle symbols marked with numbers in the figure are also contacts, and operators can perform connection operations.

[0038] In addition, the relays and relay contacts in the diagram can be made dynamic to display the relay and contact action status in real time, so as to further visualize the operation circuit and further deepen the students' understanding of the operation circuit.

[0039] The modules or units in the device of the embodiment of the present invention can be combined, divided and deleted according to actual needs. The above disclosure is only the preferred embodiment of the present invention, and of course it cannot be used to limit the scope of the rights of the present invention. Those skilled in the art can understand that all or part of the processes of the above embodiment are implemented, and the equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A substation secondary circuit training operation platform, characterized by: It includes a box body and an operating table installed on the upper end of the box body; The box is equipped with a line protection device, a simulated circuit breaker device, an intelligent terminal, and a switch opening and closing handle; the backplane terminals of the line protection device, the simulated circuit breaker device, and the intelligent terminal are connected to the operating table with secondary wires; The operating table is provided with a wiring jack, and a tripping input circuit module, a pressure input circuit module, a tripping circuit module and a closing circuit module are arranged inside the operating table; the corresponding terminals in each module are led out from the internal circuit board to the corresponding position in the circuit diagram on the operating panel for the operator to perform wiring operations.

2. The substation secondary circuit training operation platform according to claim 1 is characterized by: The tripping and closing circuit module comprises: The positive end of AC contactor KM2 is connected to one end of terminal block terminal 4Q1D2, the other end of terminal block terminal 4Q1D2 is connected to one end of pressure monitoring relay contact 11YJJ, the other end of pressure monitoring relay contact 11YJJ is connected to one end of terminal block terminal 4Q1D6, the other end of terminal block terminal 4Q1D6 is connected to the positive end of AC contactor; two pressure monitoring relay contacts 11YJJ are connected in parallel. Terminal block terminal 4C1D14 is connected to terminal block terminal 4Q1D6 and terminal block terminal 4C1D15 respectively, terminal block terminal 4C1D14 is also connected to one end of pressure plate terminal 4C1LP4, the other end of pressure plate terminal 4C1LP4 is connected to one end of reclosing switch output contact 4H, the other end of reclosing switch output contact 4H is connected in series with terminal block terminal 4C1D19, reclosing switch relay 1ZHJ, reclosing switch relay 2ZHJ and resistor R in sequence, and then connected to one end of terminal block terminal 4Q1D29, the other end of terminal block terminal 4Q1D29 is connected to the negative end of AC contactor KM2; Terminal block terminal 4C2D1 is respectively connected to the positive end of AC contactor KM2, terminal block terminal 4C2D2, and one end of the remote control of switching handle 4QK. The other end of terminal block terminal 4C2D2 is connected to one end of the five-protection locking contact 4BS. The other end of the five-protection locking contact 4BS is connected to terminal block terminal 4C2D4. Terminal block terminal 4C2D4 is respectively connected to one end of the synchronous hand-on and forced hand-on of switching handle 4QK; the other end of the synchronous hand-on of switching handle 4QK is connected to terminal block terminal 4C2D12, and terminal block terminal 4C2D12 is also connected to terminal block terminal 4C2D 13 connection; the other end of the switching handle 4QK remote control is connected to the terminal block terminal 4C2D6, the terminal block terminal 4C2D6 is also connected to one end of the pressure plate terminal 4C1LP8, the other end of the pressure plate terminal 4C1LP8 is connected to the terminal block terminal 4C2D13, the terminal block terminal 4C2D13 is also connected in series with the remote tripping and remote closing output contact CJ08, the terminal block terminal 4C2D10, the terminal block terminal 4Q1D11, the pressure monitoring relay contact 3YJJ, the manual closing relay 1SHJ, the manual closing relay 2SHJ, the resistor R, and then connected to the terminal block terminal 4Q1D29; The other end of the forced manual switching handle 4Q is respectively connected to the hand-on and hand-off ends of the operating handle 4KK, the other end of the hand-on operating handle 4KK is connected to the terminal block terminal 4Q1D12, the other end of the terminal block terminal 4Q1D12 is connected in series with the pressure monitoring relay contact 21YJJ and then connected between the pressure monitoring relay contact 3YJJ and the hand-on relay 1SHJ; Terminal block terminal 4C2D6 is also connected in series with pressure plate terminal 4C1LP7, remote trip and remote closing output contact CJ07, terminal block terminal 4C2D9, terminal block terminal 4Q1D14, manual trip relay STJA, manual trip relay STJB, manual trip relay STJC, resistor R, and then connected to terminal block terminal 4Q1D29; terminal block terminal 4Q1D14 is also connected to terminal block terminal 4Q1D15, and terminal block terminal 4Q1D15 is also connected to the other end of operating handle 4KK manual trip; after closing, one end of relay HHJ is connected between terminal block terminal 4Q1D11 and pressure monitoring relay contact 3YJJ, and the other end is connected to terminal block terminal 4Q1D29 in series with resistor R; after closing, one end of the relay is also connected between terminal block terminal 4Q1D14 and manual trip relay STJA, and the other end is connected to terminal block terminal 4Q1D29 in series with resistor R; One end of terminal block terminal 4C1D1 is connected to the positive end of AC contactor KM2, and the other end is connected in series with photodiode D1, trip relay 11TJF, trip relay 12TJF, trip relay 13TJF, and resistor R and then connected to terminal block terminal 4Q1D29; the positive pole of photodiode D1 is connected in parallel with photodiode D2, the negative pole of photodiode D2 is connected to the first end of optocoupler OC1, the second end of optocoupler OC1 is connected to terminal block terminal 4Q1D29, the third end of optocoupler OC1 is connected to chip CPU, and the fourth end of optocoupler OC1 is grounded.

3. The substation secondary circuit training operation platform according to claim 2 is characterized by: The reclosing switch outlet contact 4H includes: the two ends of the A contact are respectively connected to the pressure plate terminal 4C1LP4 and the terminal block terminal 4C1D18, and the terminal block terminal 4C1D18 is connected to the terminal block terminal 4C1D19; the two ends of the B contact are respectively connected to the pressure plate terminal 4C1LP4 and the terminal block terminal 4C1D21, and the terminal block terminal 4C1D21 is connected to the terminal block terminal 4C1D18; the two ends of the C contact are respectively connected to the pressure plate terminal 4C1LP4 and the terminal block terminal 4C1D24, and the terminal block terminal 4C1D24 is connected to the terminal block terminal 4C1D21.

4. The substation secondary circuit training operation platform according to claim 2 is characterized by: In the tripping and closing opening circuit, the pressure monitoring relay contacts 11YJJ, 3YJJ, and 21YJJ are respectively taken from the pressure monitoring relays 11YJJ, 3YJJ, and 21YJJ in the pressure opening circuit module.

5. The substation secondary circuit training operation platform according to claim 1 is characterized by: The pressure input circuit module comprises: Terminal block terminal 4Q1D2 is connected to the positive end of AC contactor KM2; one end of terminal block terminal 4Q1D4 is connected to the positive end of AC contactor KM2, and the other end is connected in series with terminal block terminal 4Q1D17, resistor R, pressure monitoring relay 21YJJ, resistor R, and then connected to terminal block terminal 4Q1D29, and terminal block terminal 4Q1D29 is also connected to the negative end of AC contactor KM2; one end of terminal block terminal 4Q1D21 is connected to the input end of pressure monitoring relay 21YJJ, and the other end is connected to the negative end of AC contactor KM2; Terminal block terminal 4Q1D18 is connected to terminal block terminal 4Q1D17, and terminal block terminal 4Q1D18 is also connected in series with resistor R, pressure monitoring relay 3YJJ, and resistor R in sequence, and then connected to terminal block terminal 4Q1D29; one end of terminal block terminal 4Q1D22 is connected to the input end of pressure monitoring relay 3YJJ, and the other end is connected to the negative end of AC contactor KM2; Terminal block terminal 4Q1D19 is connected to terminal block terminal 4Q1D18, and terminal block terminal 4Q1D19 is also connected in series with resistor R, pressure monitoring relay 11YJJ, and resistor R in sequence, and then connected to terminal block terminal 4Q1D29; one end of terminal block terminal 4Q1D23 is connected to the input end of pressure monitoring relay 11YJJ, and the other end is connected to the negative end of AC contactor KM2; pressure monitoring relay contact 4YJJ is connected in parallel to pressure monitoring relay 11YJJ; Terminal block terminal 4Q1D25 is connected to the positive terminal of AC contactor KM2. Terminal block terminal 4Q1D25 is also connected in series with resistor R, pressure monitoring relay 4YJJ, resistor R and then connected to terminal block terminal 4Q1D29; terminal block terminal 4Q1D26 is connected to the input end of pressure monitoring relay 4YJJ.

6. The substation secondary circuit training operation platform according to claim 5 is characterized by: In the pressure input loop module, the pressure monitoring relay contact 4YJJ is opened into the pressure monitoring relay 4YJJ in the loop module.

7. The substation secondary circuit training operation platform according to claim 1 is characterized by: The trip circuit module comprises: Terminal block terminal 4Q1D2 is connected to the positive end of AC contactor KM2, and terminal block terminal 4Q1D2 is also connected in series with closing relay HWJA, resistor R, resistor R, and terminal block terminal 4K1D1 in sequence; the first end of optocoupler OC2 is connected to the output end of closing relay HWJA, the second end of optocoupler OC2 is connected between two resistors R, the third end of optocoupler OC2 is connected to CPU, and the fourth end is grounded; terminal block terminal 4Q1D5 is connected to the positive end of AC contactor KM2, and terminal block terminal 4Q1D5 is also connected in series with tripping relay contact 11TJF, tripping holding relay TBJA, terminal block terminal 4K1D2, and one end of circuit breaker tripping coil phase A, and the other end of circuit breaker tripping coil phase A is connected to the negative end of AC contactor KM2, and terminal block terminal 4K1D2 is connected to terminal block terminal 4K 1D1 is connected; one end of the tripping and holding relay contact TBJA is connected to the terminal block terminal 4Q1D2, and the other end is connected to the input end of the tripping and holding relay TBJA; the manual tripping relay contact STJA is connected in parallel to the two ends of the tripping relay contact 11TJF; the two ends of the pressure monitoring relay contact 11YJJ are respectively connected to the terminal block terminal 4Q1D5 and the terminal block terminal 4Q1D2, and the two ends of the pressure monitoring relay contact 11YJJ are also connected in parallel with the pressure monitoring relay contact 11YJJ; the tripping A contact is connected to the terminal block terminal 4Q1D5, and the tripping A contact is also connected in series with the pressure plate terminal 4C1LP1 and the terminal block terminal 4C1D4, and the terminal block terminal 4C1D5 is respectively connected to the terminal block terminal 4C1D4 and the input end of the tripping and holding relay TBJA; the terminal block terminal 4Q1D29 is connected to the negative end of the AC contactor KM2; Terminal block terminal 4Q1D2 is also connected in series with closing relay HWJB, resistor R, resistor R, and terminal block terminal 4K1D4 in sequence; the first end of the optical coupler OC3 is connected to the output end of the closing relay HWJB, the second end of the optical coupler OC3 is connected between the two resistors R, the third end of the optical coupler OC3 is connected to the CPU, and the fourth end is grounded; terminal block terminal 4Q1D5 is also connected in series with trip relay contact 12TJF, trip holding relay TBJB, terminal block terminal 4K1D5, one end of the circuit breaker trip coil B phase, and the other end of the circuit breaker trip coil B phase is connected to the AC contactor The negative end of KM2 is connected, and the terminal block terminal 4K1D5 is connected to the terminal block terminal 4K1D4; one end of the tripping and holding relay contact TBJB is connected to the terminal block terminal 4Q1D2, and the other end is connected to the input end of the tripping and holding relay TBJB; the manual tripping relay contact STJB is connected in parallel to the two ends of the tripping relay contact 12TJF; the tripping B contact is connected to the terminal block terminal 4Q1D5, and the tripping B contact is also connected in series with the pressure plate terminal 4C1LP2 and the terminal block terminal 4C1D7, and the terminal block terminal 4C1D8 is respectively connected to the terminal block terminal 4C1D7 and the input end of the tripping and holding relay TBJB; Terminal block terminal 4Q1D2 is also connected in series with closing relay HWJC, resistor R, resistor R, and terminal block terminal 4K1D7 in sequence; the first end of optocoupler OC4 is connected to the output end of closing relay HWJC, the second end of optocoupler OC4 is connected between two resistors R, the third end of optocoupler OC4 is connected to CPU, and the fourth end is grounded; terminal block terminal 4Q1D5 is also connected in series with trip relay contact 13TJF, trip holding relay TBJC, terminal block terminal 4K1D8, one end of circuit breaker trip coil C phase, and the other end of circuit breaker trip coil C phase is connected to AC contactor K The negative end of M2 is connected, terminal block terminal 4K1D8 is connected to terminal block terminal 4K1D7; one end of the tripping and holding relay contact TBJC is connected to terminal block terminal 4Q1D2, and the other end is connected to the input end of the tripping and holding relay TBJC; the manual tripping relay contact STJC is connected in parallel to the two ends of the tripping relay contact 13TJF; the tripping C contact is connected to terminal block terminal 4Q1D5, and the tripping C contact is also connected in series with the pressure plate terminal 4C1LP3 and the terminal block terminal 4C1D10, and the terminal block terminal 4C1D11 is respectively connected to the terminal block terminal 4C1D10 and the input end of the tripping and holding relay TBJC.

8. The substation secondary circuit training operation platform according to claim 7 is characterized by: In the tripping circuit module, the pressure monitoring relay contact 11YJJ is taken from the pressure monitoring relay 11YJJ of the pressure input circuit module; the tripping holding relay contacts TBJA, TBJB, and TBJC are respectively taken from the tripping holding relays TBJA, TBJB, and TBJC in the tripping circuit module; the tripping relay contacts 11TJF, 12TJF, and 13TJF are respectively taken from the tripping relays 11TJF, 12TJF, and 13TJF of the tripping and closing input circuit module.

9. The substation secondary circuit training operation platform according to claim 1 is characterized by: The closing circuit module comprises: Terminal block terminal 4Q1D2 is connected to the positive end of AC contactor KM2. Terminal block terminal 4Q1D2 is also connected in series with jump relay TWJA, resistor R, resistor R, terminal block terminal 4K1D10, and circuit breaker A phase normally closed auxiliary contact DLA. The other end of circuit breaker A phase normally closed auxiliary contact DLA is connected to the negative end of AC contactor KM2. Terminal block terminal 4Q1D29 is connected to the negative end of AC contactor KM2. The first end of optocoupler OC5 is connected to the output end of jump relay TWJA. The second end of optocoupler OC5 is connected between two resistors R. The third end of optocoupler OC5 is connected to CPU, and the fourth end is grounded. Terminal block terminal 4Q1D6 is connected to the positive end of AC contactor KM2. Sub 4Q1D6 is also connected in series with the hand-closing relay contact 1SHJ-1, the closing holding relay HBJA, the terminal 4K1D11 of the terminal block, and one end of the closing coil phase A of the circuit breaker, and the other end of the closing coil phase A of the circuit breaker is connected to the negative end of the AC contactor KM2; the two ends of the pressure monitoring relay contact 11YJJ are respectively connected to the terminal 4Q1D2 of the terminal block and the terminal 4Q1D6 of the terminal block, and the two ends of the pressure monitoring relay contact 11YJJ are also connected in parallel with the pressure monitoring relay contact 11YJJ; the two ends of the closing holding relay contact HBJA are respectively connected to the terminal 4Q1D2 of the terminal block and the input end of the closing holding relay HBJA, and the reclosing relay contact 1ZHJ-1 is connected in parallel with the two ends of the hand-closing relay contact 1SHJ-1; Terminal block terminal 4Q1D2 is also connected in series with jump relay TWJB, resistor R, resistor R, terminal block terminal 4K1D14, circuit breaker B phase normally closed auxiliary contact DLB, the other end of circuit breaker B phase normally closed auxiliary contact DLB is connected to the negative end of AC contactor KM2, the first end of optocoupler OC6 is connected to the output end of jump relay TWJB, the second end of optocoupler OC6 is connected between two resistors R, the third end of optocoupler OC6 is connected to CPU, and the fourth end is grounded; terminal block Terminal 4Q1D6 is also connected in series with the hand-closing relay contact 1SHJ-2, the closing holding relay HBJB, the terminal block terminal 4K1D15, and one end of the closing coil B phase of the circuit breaker, and the other end of the closing coil B phase of the circuit breaker is connected to the negative end of the AC contactor KM2; the two ends of the closing holding relay contact HBJB are respectively connected to the terminal block terminal 4Q1D2 and the input end of the closing holding relay HBJB, and the reclosing relay contact 1ZHJ-2 is connected in parallel to the two ends of the hand-closing relay contact 1SHJ-2; Terminal block terminal 4Q1D2 is also connected in series with jump relay TWJC, resistor R, resistor R, terminal block terminal 4K1D18, and circuit breaker C phase normally closed auxiliary contact DLC. The other end of circuit breaker C phase normally closed auxiliary contact DLC is connected to the negative end of AC contactor KM2. The first end of optical coupler OC7 is connected to the output end of jump relay TWJC. The second end of optical coupler OC7 is connected between two resistors R. The third end of optical coupler OC7 is connected to CPU, and the fourth end is grounded. Terminal 4Q1D6 is also connected in series with the manual closing relay contact 2SHJ-1, the closing holding relay HBJC, the terminal block terminal 4K1D19, and one end of the circuit breaker closing coil phase C. The other end of the circuit breaker closing coil phase C is connected to the negative end of the AC contactor KM2; the two ends of the closing holding relay contact HBJC are respectively connected to the terminal block terminal 4Q1D2 and the input end of the closing holding relay HBJC, and the reclosing relay contact 2ZHJ-1 is connected in parallel to the two ends of the manual closing relay contact 2SHJ-1.

10. The substation secondary circuit training operation platform according to claim 9 is characterized in that: In the closing circuit module, the pressure monitoring relay contact 11YJJ is taken from the pressure monitoring relay 11YJJ of the pressure input circuit module; the closing holding relay contacts HBJA, HBJB, and HBJC are respectively taken from the closing holding relays HBJA, HBJB, and HBJC of the closing circuit module; the manual closing relay contacts 1SHJ-1 and 1SHJ-2 are taken from the manual closing relay 1SHJ of the jump closing input circuit module, and the manual closing relay contact 2SHJ is taken from the manual closing relay 2SHJ of the jump closing input circuit module; the reclosing relay contacts 1ZHJ-1 and 1ZHJ-2 are taken from the reclosing relay 1ZHJ of the jump closing input circuit module, and the reclosing relay contact 2ZHJ is taken from the reclosing relay of the jump closing input circuit module.

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