Tooling box of all-working-condition simulation device for protection verification of generator-transformer unit of power station

Abstract

The invention discloses an all-condition simulation device tool box for power station machine transformer group protection verification, which comprises a box body (1), a logic matrix circuit board (2) is arranged in the box body (1), the logic matrix circuit board (2) is connected with a relay module (3), the outer side surface of the box body (1) is provided with an aviation plug (4) connected with the relay module (3), and the aviation plug (4) is connected with a position signal connecting line (5); the upper surface of the box body (1) is provided with an operation condition operation indication button (6), an indication lamp (7) and a power switch (8). According to the invention, the wiring frequency can be greatly reduced, the carrying is convenient, the operation is simple, the working efficiency of protection verification is greatly improved, and the possibility of three-error risks caused by frequent wiring disassembly of operation and maintenance personnel is effectively reduced.

Description

Technical Field

[0001] The invention relates to a pumped storage power station machine transformer group protection verification device, in particular to a full-operating condition simulation device tool box for power station machine transformer group protection verification. Background Art

[0002] There are many operating conditions for the units in pumped storage power stations. The machine-transformer group protection device collects position signals of switches, knife switches, etc., determines the operating conditions of the units, activates the protection locking function, and realizes different protections for the units and main electrical equipment such as main transformers under different unit operating modes. In order to protect the safety of the main equipment of the power station and ensure the reliable and sensitive operation of the machine-transformer group protection, the operation and maintenance personnel will perform partial or full calibration of the machine-transformer group protection device according to the cycle. In order to more truly reflect the actual protection setting action of the machine-transformer group protection under different unit operating conditions, the unit operating conditions must be simulated.

[0003] During the inspection, verification, installation and commissioning of the machine-transformer protection unit, the operation and maintenance personnel routinely simulate different operating conditions of the unit, mainly through a combination of various signals such as short-circuit switches and knife switch positions.

[0004] Traditional operation and maintenance personnel frequently go to the protection cabinet to short-circuit the switch position signal, and mainly face the following problems: First, the signal wiring needs to be carefully checked during the short-circuiting process, and different protection and working conditions require disconnection of the wiring, which makes the protection verification work inefficient; second, the protection cabinet has limited space, and frequent disconnection of the wiring can easily cause disconnection errors, resulting in damage to the equipment or safety incidents of erroneous tripping of the running equipment; third, according to operation and maintenance experience, terminals that are frequently disconnected are prone to damage and need to be replaced regularly. If they are not replaced in time, the terminals will also cause unsafe equipment incidents.

[0005] Therefore, the existing technology has the problems of low working efficiency and easy damage of terminals. Summary of the invention

[0006] The purpose of the present invention is to provide a tool box for a full-operating-condition simulation device for protection verification of a power station transformer group. The present invention can greatly reduce the frequency of wiring, is easy to carry, and is simple to operate, greatly improving the efficiency of protection verification work, while effectively reducing the possibility of "three errors" caused by frequent wiring disconnection by operation and maintenance personnel.

[0007] The technical solution of the present invention is as follows: a tool box for a full-operating condition simulation device for checking the protection of a power station machine-transformer group, comprising a box body, a logic matrix circuit board is arranged inside the box body, the logic matrix circuit board is connected to a relay module, an aviation plug connected to the relay module is arranged on the outer side of the box body, the aviation plug is connected to a position signal connection line; an operating condition operation indication button, an indicator light and a power switch are arranged on the upper surface of the box body.

[0008] In the aforementioned tooling box of the full-operating-condition simulation device for checking the protection of the power station machine-transformer group, a power module connected to the relay module is also provided in the box body, and the power switch is connected to the power module.

[0009] In the aforementioned full-operating-condition simulation device tooling box for power station machine-transformer group protection verification, the number of relay modules is 2 groups.

[0010] In the aforementioned full-operating condition simulation device tooling box for power station machine-transformer protection verification, an air distribution plate is provided on the left side of the box body, an air inlet cavity is provided between the air distribution plate and the inner wall of the box body, a plurality of air inlets are provided at the bottom of the air inlet cavity, and a heat dissipation fan is provided in the middle position of the top right side of the box body.

[0011] In the aforementioned full-operating-condition simulation device tooling box for power station machine-transformer group protection verification, a dust collector is provided in each air inlet.

[0012] In the aforementioned full-operating condition simulation device tooling box for power station transformer protection verification, the air inlet is provided with a stepped groove, the upper and lower ends of the stepped groove are provided with magnetic contact switches, and a matching magnetic sheet is provided on the inner side of the dust collector.

[0013] Compared with the prior art, the present invention is composed of a box body, a logic matrix circuit board, a relay module, an aviation plug, a position signal connection line, a power module, and some button indicator lights. It can simulate 8 operating conditions of pumped storage power station units, greatly reduce the frequency of wiring, is easy to carry, and is simple to operate. It greatly improves the efficiency of protection verification work, and effectively reduces the possibility of "three errors" caused by frequent disconnection of wiring by operation and maintenance personnel. Compared with the prior art, the present invention has the following advantages:

[0014] 1. The operation and maintenance personnel only need to connect the position signal lines of switches, knife switches, etc. on the tooling box of the simulation device to the corresponding position signals of the protection device at one time. There is no need to short-circuit the signals multiple times under different protection and different working conditions. This greatly reduces the frequency of line verification, removal and wiring by the operation and maintenance personnel, effectively reduces the risk of "three errors" in the protection operation of the operation and maintenance personnel, and reduces the risk of erroneous tripping of the running equipment and damage to the equipment;

[0015] 2. In the traditional mode, the voltage when the maintenance personnel disconnect the wires is DC 220V, while the working voltage on the simulation device tooling box is 5V. In the traditional mode, the maintenance personnel need to disconnect the wires many times, while the simulation device only needs to connect the wires once, which greatly reduces the risk of electric shock during the operation of the maintenance personnel;

[0016] 3. Reducing the frequency of disconnection and wiring can effectively protect the terminal block, increase the service life of the terminal block, and better ensure the healthy and stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a top view of embodiment 1 of the present invention;

[0018] Figure 2 1 is a view of the internal structure of the box body of Example 1 of the present invention;

[0019] Figure 3 It is the circuit schematic;

[0020] Figure 4 This is a view of the internal structure of the box body of Example 2;

[0021] Figure 5 yes Figure 4 A partial enlarged view of .

[0022] The marks in the accompanying drawings are: 1-box body, 2-logic matrix circuit board, 3-relay module, 4-aviation plug, 5-position signal connecting line, 6-operating condition operation indication button, 7-indicator light, 8-power switch, 9-power module, 10-air balancing plate, 12-air inlet chamber, 13-air inlet, 14-cooling fan, 15-dust collector, 16-step groove, 17-magnetic contact switch, 11-magnetic sheet. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0024] Embodiment 1. A full-operating-condition simulation device tooling box for checking the protection of a pumped-storage power station transformer unit is constructed as follows: Figure 1-2 As shown, it includes a box body 1, a logic matrix circuit board 2 is arranged inside the box body 1, the logic matrix circuit board 2 is connected to a relay module 3, an aviation plug 4 connected to the relay module 3 is arranged on the outer side of the box body 1, and the aviation plug 4 is connected to a position signal connection line 5; the upper surface of the box body 1 is provided with an operating condition operation indication button 6, an indicator light 7 and a power switch 8.

[0025] A power module 9 connected to the relay module 3 is also provided in the box body 1 , and a power switch 8 is connected to the power module 9 .

[0026] The number of relay modules 3 is 2 groups.

[0027] The present invention develops a full-operating-condition simulation device tool box suitable for protection verification of a pumped-storage power station machine-transformer group. The tool box adopts an F15 flat cover, which is waterproof, dustproof, and corrosion-resistant. It contains a logic matrix circuit board, two groups of 8-way relay modules (capable of inputting and outputting 16-way signals), three aviation plugs (each with 5-way outputs), and two button indicator lights.

[0028] There are two types of button indicator lights, which are used for switch and knife switch position signal indication, device power supply and 8 types of unit operating conditions. The first type of button indicator light (indicator light) is a red indicator light: 12mm in diameter, 3-9V power supply, with the following functions: red indicator light, used to indicate the position status of 12 types of switches, knife switches, and monitoring input signals; the second type of button indicator light (operating condition operation indicator button) is a ring-shaped green light: 12mm in diameter, 3-9V power supply, with the following functions: press the switch, the button goes down, the button light comes on, and the equipment is powered on; release your finger, the button does not reset; press the switch again, the button resets, the button goes out, and the equipment is powered off. The schematic diagram of the tooling box panel is as follows: Figure 1 shown.

[0029] The present invention has developed a full-condition simulation device tool box suitable for pumped-storage power station machine-transformer protection verification, which simulates 8 operating conditions of pumped-storage power station units, including power generation operating conditions, power generation phase adjustment conditions, water pump operating conditions, water pump phase adjustment conditions, traction machine operating conditions, standby traction machine operating conditions, electric brake conditions, and circuit breaker tripping status. The specific operation steps are as follows: complete the wiring of the simulation device to the terminal block at the rear of the protection panel cabinet (the wiring is completed at one time, and the line number of the protection simulation device has indicated the terminal block number on the opposite side), press the power switch on the device tool box, and then press the button (one-touch button) to open a certain unit operating condition operation, and check the unit operating conditions and whether the switch, knife switch, and monitoring position contact signals are in place on the protection device.

[0030] Circuit such as Figure 3 As shown, the logic matrix circuit board is used to realize the mapping relationship between the unit operating conditions and the protection input;

[0031] The relay module connected to the logic matrix circuit board is used to receive the weak current signal IN output by the logic matrix circuit board to close the normally open node of the relay module;

[0032] like Figure 3 As shown, the logic matrix circuit board includes a circuit board, a diode and a jumper, which is used to realize the mapping relationship between the operating conditions and the protection input; on the circuit board, the horizontal stripe represents the operating conditions, and the operating condition button connected in series introduces the weak current power supply circuit to reflect the operating conditions; the vertical stripe represents the auxiliary contact state, and the diode is selectively welded at the intersection according to the corresponding relationship between the operating conditions and the auxiliary contacts, and the vertical stripe connected to the diode is powered. The circuit includes 10 operating conditions GK1-GK10 (including 2 spare conditions), which are reflected in 10 rows on the circuit, including 12 auxiliary node positions, and are represented in 10 columns on the circuit. A diode is set at the position where the matrix element is 1 in the matrix Z. When the diode is turned on, a weak current signal is output to the relay module.

[0033] The relay module is connected to the terminal of the unit protection device via an aviation plug and a position signal connection line. It is used to receive the weak current signal IN output by the logic matrix circuit board to close the normally open node of the relay; the common end is connected to the common end of the protection device through an aviation plug, and the normally open contact is connected to the auxiliary contact input terminal of the protection device through an aviation plug, so as to send the working condition signal or the manual control auxiliary node signal WJ to the protection device.

[0034] The unit operating condition simulation method for protection and commissioning of pumped storage power stations has the following specific steps:

[0035] (1) Count the number of operating conditions m of the pumped storage unit protection, number each operating condition, and establish the pumped storage unit protection operating condition row vector GK; the operating conditions of the pumped storage unit protection at least include power generation operating conditions, power generation phase adjustment conditions, power generation start-up conditions, water pump operating conditions, water pump phase adjustment conditions, traction machine operating conditions, traction machine operating conditions, electric braking conditions, and circuit breaker opening conditions.

[0036] (2) Count the number of auxiliary contact signals n for protection of the pumped-storage unit, and establish a column vector IN of the auxiliary contact input signals for protection of the pumped-storage unit; the auxiliary contact signals for protection of the pumped-storage unit at least include the closing position of the generator circuit breaker, the opening position of the generator circuit breaker, the closing position of the generator phase-changing switch, the closing position of the pumping phase-changing switch, the opening position of the phase-changing switch, the closing position of the dragging switch, the closing position of the dragged switch, the closing position of the electric brake switch, the generator phase adjustment mode monitoring input, and the black start operating mode input.

[0037] (3) Counting the relationship between each operating condition of the pumped-storage unit protection and the auxiliary contacts of the pumped-storage unit protection; in this embodiment, the relationship between each operating condition of the pumped-storage unit protection and the auxiliary contacts of the pumped-storage unit protection is specifically as follows: in the power generation operating condition, the phase-changing switch generator position = 1 and the generator circuit breaker open position = 0 and the generator phase adjustment mode = 0; in the power generation phase adjustment condition, the phase-changing switch generator position = 1 and the generator circuit breaker open position = 0 and the generator phase adjustment mode = 1; in the power generation start-up condition, the phase-changing switch generator position = 1 and the generator circuit breaker open position = 0 and the generator phase adjustment mode = 1. Motor circuit breaker opening position = 1; when the water pump is running, the phase-changing switch motor position = 1 and the generator circuit breaker opening position = 0 and the water pump phase adjustment mode = 0; when the water pump is in phase adjustment, the phase-changing switch motor position = 1 and the generator circuit breaker opening position = 0 and the water pump phase adjustment mode = 1; when the traction machine is in operation, the traction switch closing position =; when the dragged machine is in operation, the dragged switch closing position = 1; when the electric brake is in operation, the electric brake switch closing position = 1 and the generator circuit breaker opening position = 1; when the circuit breaker is in the opening state, the generator circuit breaker opening position = 1. Among them, 1 means that the corresponding position receives a signal, and the potential is generally +110V, and 0 means that the corresponding position does not receive a signal, and the potential is generally -110V.

[0038] (4) According to step (3), a mapping relationship matrix Z0 between the row vector GK of the pumped storage unit protection operation condition and the column vector IN of the pumped storage unit protection auxiliary contact input signal is established, see Table 1;

[0039] Table 1

[0040]

[0041] (5) During the actual operation of the pumped-storage unit, according to the physically exclusive relationship between the pumped-storage unit protection auxiliary contact signals in step (2), the matrix mapping relationship between the pumped-storage unit protection operation condition row vector GK and the pumped-storage unit protection auxiliary contact input signal column vector IN is corrected. The corrected mapping relationship matrix is ​​Z, see Table 2.

[0042] Table 2

[0043]

[0044]

[0045] The present invention develops a full-operating condition simulation device tool box suitable for pumped-storage power station machine-transformer group protection verification. The tool box has a suitable appearance size, weight, etc., and can simulate 12 types of locking input signals of switch blades and 8 types of pumped-storage operating conditions. The simulation device tool box reserves 4 groups of locking signal extension contacts and 2 groups of unit operating condition standby buttons. If a new operating condition is added to the pumped-storage power station unit or a new locking signal is added to the machine-transformer group protection device, it is only necessary to establish a mapping relationship between the new operating condition and the locking signal quantity on the logic circuit board to realize the operating condition simulation and issue the corresponding locking signal to the protection device.

[0046] Embodiment 2. The difference between this embodiment and embodiment 1 is that Figure 4-5 As shown, an air distribution plate 10 is provided on the left side of the box body 1, an air inlet cavity 12 is provided between the air distribution plate 10 and the inner wall of the box body 1, a plurality of air inlets 13 are provided at the bottom of the air inlet cavity 12, and a heat dissipation fan 14 is provided at the middle position of the top right side of the box body 1. A dust collector 15 is provided in each air inlet 13. By providing the above heat dissipation structure in the box body, the internal temperature of the box body can be effectively controlled to ensure the smooth and stable progress of the working condition simulation operation.

[0047] The air inlet 13 is provided with a stepped groove 16, and the upper and lower ends of the stepped groove 16 are provided with a magnetic touch switch 17, and the inner side of the dust collector 15 is provided with a matching magnetic sheet 11. The cooperation of the magnetic sheet and the magnetic touch switch facilitates the installation and replacement of the dust collector.

Claims

1. A full-condition simulation device tooling box for power station machine-transformer protection verification, characterized in that: The invention comprises a box body (1), wherein a logic matrix circuit board (2) is arranged inside the box body (1), the logic matrix circuit board (2) is connected to a relay module (3), an aviation plug (4) connected to the relay module (3) is arranged on the outer side of the box body (1), and the aviation plug (4) is connected to a position signal connection line (5); and an operating condition operation indication button (6), an indicator light (7) and a power switch (8) are arranged on the upper surface of the box body (1).

2. According to claim 1, a tool box for a full-operating-condition simulation device for checking the protection of a power station transformer unit, characterized in that: A power module (9) connected to the relay module (3) is also provided in the box body (1), and a power switch (8) is connected to the power module (9).

3. The tool box of a full-operating-condition simulation device for checking the protection of a power station transformer group according to claim 1 is characterized in that: The number of relay modules (3) is 2 groups.

4. The tool box of a full-operating-condition simulation device for checking the protection of a power station transformer group according to claim 1 is characterized in that: An air distribution plate (10) is provided on the left side of the box body (1), an air inlet cavity (12) is provided between the air distribution plate (10) and the inner wall of the box body (1), a plurality of air inlets (13) are provided at the bottom of the air inlet cavity (12), and a heat dissipation fan (14) is provided at the middle position of the top right side of the box body (1).

5. The tool box of a full-operating-condition simulation device for checking the protection of a power station transformer group according to claim 4 is characterized in that: A dust collector (15) is provided in each air inlet (13).

6. The tool box of a full-operating-condition simulation device for checking the protection of a power station transformer unit according to claim 4 is characterized in that: The inlet of the air inlet (13) is provided with a stepped groove (16), the upper and lower ends of the stepped groove (16) are provided with magnetic contact switches (17), and the inner side of the dust collector (15) is provided with a matching magnetic sheet (11).

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