Unit working condition simulation circuit for pumped storage power station protection debugging

Abstract

The utility model discloses a unit working condition simulation circuit for pumped storage power station protection debugging, comprising a logic matrix circuit board (1) used for realizing the mapping relation between the unit operation working condition and the protection input; the relay module (2) is connected with the logic matrix circuit board (1) and is used for receiving the weak current signal IN output by the logic matrix circuit board, so that a normally open node of the relay module is closed; and the power supply module (3) is connected with the relay module (2). The utility model has the characteristics that the working efficiency, safety and reliability can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pumped storage power station working condition simulation field, especially a unit working condition simulation circuit for pumped storage power station protection debugging. BACKGROUND

[0002] The pumped storage power station unit supports multiple working conditions such as power generation operation, power generation phase modulation, pumping operation, pumping phase modulation, driving machine operation, and driven machine operation. The electrical quantities such as voltage, current, and power of the unit under each working condition have different characteristics. The unit relay protection device identifies the working condition through position signals such as unit switches and knife switches or monitoring working condition information, opens or locks specific protection functions according to the electrical quantity characteristics of different working conditions, and realizes protection of the primary equipment of the power station. During the unit protection debugging process, the primary equipment such as outlet switches and commutation knives are in a maintenance state and cannot actually act, so the secondary wiring needs to be removed and short-circuited to simulate various working conditions.

[0003] Currently, when the operation and maintenance personnel debug, one person needs to short-circuit the signal behind the screen, and the other person needs to check the incoming information in front of the screen to confirm that the working condition setting is successful, which is low in efficiency. At the same time, the strong current terminals related to the working condition discrimination are frequently disconnected, which is low in work efficiency and has great risks such as personal electric shock, terminal damage, disconnection error, and equipment malfunction. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a unit working condition simulation circuit for pumped storage power station protection debugging. The utility model has the characteristics of effectively improving work efficiency and safety and reliability.

[0005] The technical scheme of the utility model: a unit working condition simulation circuit for pumped storage power station protection debugging, comprising a logic matrix circuit board for realizing the mapping relationship between the unit working condition and the protection incoming;

[0006] A relay module connected with the logic matrix circuit board for receiving the weak current signal IN output by the logic matrix circuit board to make the normally open node of the relay module closed;

[0007] A power module connected with the relay module;

[0008] Further comprising a button and indicator light module connected with the logic matrix circuit board.

[0009] In the aforementioned unit working condition simulation circuit for pumped storage power station protection debugging, the button and indicator light module comprises a device power button indicator light, a working condition button indicator light, and an auxiliary contact button indicator light.

[0010] In the aforementioned unit working condition simulation circuit for pumped storage power station protection debugging, the power module comprises a lithium battery and a charging unit.

[0011] The relay module is connected with the terminals of the unit protection device through an aviation plug.

[0012] Compared with the prior art, the working condition simulation circuit is composed of the logic matrix circuit board, the relay module and the power module, the logic matrix circuit board is used for realizing the mapping relationship between the unit operation working condition and the protection input, the relay module is used for receiving the weak current signal IN output by the logic matrix circuit board, and the normally open node of the relay module is closed, through the circuit, the unit operation working condition can be simulated in one key mode, the repeated wiring disconnection work is avoided, the debugging work efficiency and safety are remarkably improved, and the problem of serious shortage of current pumped storage relay protection professionals is effectively alleviated. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is the circuit diagram of the utility model;

[0014] Fig. 2 is the principle diagram of the logic matrix circuit board.

[0015] The marks in the drawings are as follows: 1 is a logic matrix circuit board, 2 is a relay module, 3 is a power module, 301 is a lithium battery, and 302 is a charging unit. DETAILED DESCRIPTION

[0016] The utility model will be further described below in combination with the drawings and examples, but not as the basis for limiting the utility model.

[0017] Example. The unit working condition simulation circuit for pumped storage power station protection debugging is constituted as shown in Figs. 1-2 The logic matrix circuit board 1 is used for realizing the mapping relationship between the unit operation working condition and the protection input.

[0018] The relay module 2 connected with the logic matrix circuit board 1 is used for receiving the weak current signal IN output by the logic matrix circuit board, so that the normally open node of the relay module is closed.

[0019] The power module 3 connected with the relay module 2.

[0020] The button and indicator light module connected with the logic matrix circuit board 1 is further included.

[0021] The button and indicator light module includes a device power button indicator light, a working condition button indicator light, and an auxiliary contact button indicator light. The device power button indicator light is used to realize the overall power-on function of the device and indicate the activation result of the device; the working condition button indicator light is used to realize the working condition output function, indicate the working condition result, and light up the auxiliary contact button indicator light corresponding to the working condition; at the same time, the circuit can also simulate abnormal operating conditions through self-defined auxiliary contact combinations, such as simulating the pumping operating condition, in which the pumping phase change knife position signal is lost.

[0022] The power module 3 includes a lithium battery 301 and a charging unit 302. The power supply and charging functions of the operating condition simulation device are realized;

[0023] The relay module 2 is connected to the terminals of the unit protection device through an aviation plug. It receives the weak current signal IN output by the logic matrix circuit board, so that the normally open contact of the relay is closed; the common terminal is connected to the common terminal of the protection device through the aviation plug, and the normally open contact is connected to the auxiliary contact input terminal of the protection device through the aviation plug, so that the working condition signal or the manual control auxiliary node signal WJ is sent to the protection device;

[0024] The aviation plug connects the working condition signal or the manual opening signal of the working condition simulation device to the terminals of the unit protection device.

[0025] The logic matrix circuit board includes a circuit board, diodes, and jumpers, and is used to realize the mapping relationship between the operating conditions and the protection inputs; on the circuit board, the horizontal strip wiring represents the operating conditions, and the weak current power supply circuit is introduced by the operating condition button connected in series to realize the operating conditions; the vertical strip wiring represents the auxiliary contact state, and a diode is selectively welded at the intersection according to the correspondence between the working condition and the auxiliary contact. The vertical strip wiring connected to the diode is powered. The circuit includes 10 operating conditions GK1-GK10 (including 2 standby conditions), which are represented as 10 rows on the circuit, including 12 auxiliary node positions, which are represented as 10 columns on the circuit. In the matrix Z, the matrix elements at the positions of 1 are provided with diodes. When the diodes are turned on, the weak current signal is output to the relay module.

[0026] The unit working condition simulation method for the protection and debugging of a pumped storage power station is as follows:

[0027] (1) Count the number m of operating conditions of the pumped storage unit protection, number each working condition, and establish a pumped storage unit protection operating condition row vector GK; the operating conditions of the pumped storage unit protection at least include a power generation operating condition, a power generation phase modulation operating condition, a power generation start operating condition, a water pump operating condition, a water pump phase modulation operating condition, a driving machine operating condition, a driven machine operating condition, an electric braking condition, and a circuit breaker opening operating condition.

[0028] (2) Statistics of the number of pumped storage unit protection auxiliary contact signals n, and the establishment of pumped storage unit protection auxiliary contact input signal column vector IN; pumped storage unit protection auxiliary contact signals at least include generator circuit breaker closing position, generator circuit breaker opening position, generator commutator switch closing position, pumped commutator switch closing position, commutator switch opening position, drag switch closing position, driven switch closing position, electric brake switch closing position, generator phase modulation mode monitoring input and black start condition mode input.

[0029] (3) Statistics of the relationship between each operating condition of pumped storage unit protection and pumped storage unit protection auxiliary contact; in this embodiment, the relationship between each operating condition of pumped storage unit protection and pumped storage unit protection auxiliary contact is as follows: in generator operating condition, commutator switch generator position = 1 and generator circuit breaker opening position = 0 and generator phase modulation mode = 0; in generator phase modulation condition, commutator switch generator position = 1 and generator circuit breaker opening position = 0 and generator phase modulation mode = 1; in generator starting condition, commutator switch generator position = 1 and generator circuit breaker opening position = 1; in water pump operating condition, commutator switch motor position = 1 and generator circuit breaker opening position = 0 and water pump phase modulation mode = 0; in water pump phase modulation condition, commutator switch motor position = 1 and generator circuit breaker opening position = 0 and water pump phase modulation mode = 1; in drag motor condition, drag switch closing position = 1; in driven operating condition, driven switch closing position = 1; in electric brake condition, electric brake switch closing position = 1 and generator circuit breaker opening position = 1; in circuit breaker opening state, generator circuit breaker opening position = 1. Wherein, 1 indicates that the corresponding position receives a signal, the potential is generally +110V, 0 indicates that the corresponding position does not receive a signal, the potential is generally -110V.

[0030] (4) According to step (3), the mapping relationship matrix Z0 between pumped storage unit protection operating condition row vector GK and pumped storage unit protection auxiliary contact input signal column vector IN is established, see Table 1;

[0031] Table 1

[0032]

[0033] (5) In the actual operation of pumped storage unit, according to the mutual exclusion relationship of pumped storage unit protection auxiliary contact signals in step (2), the matrix mapping relationship between pumped storage unit protection operating condition row vector GK and pumped storage unit protection auxiliary contact input signal column vector IN is corrected, and the corrected mapping relationship matrix is Z, see Table 2.

[0034]

[0035]

[0036] The application relates to a pumped storage power station unit operation condition simulation method, which is realized by a diode circuit, and through one-key operation, the protection debugging process is simplified, repeated disconnection and connection work is avoided, and the debugging work efficiency and safety are significantly improved, and the current problems of low pumped storage unit protection debugging operation condition simulation efficiency, terminal damage, disconnection error and the like are eradicated.

Claims

1. The unit operating condition simulation circuit for protection and commissioning of pumped storage power stations is characterized by: It includes a logic matrix circuit board (1) for realizing the mapping relationship between the unit operating conditions and the protection input; A relay module (2) connected to the logic matrix circuit board (1) is used to receive a weak current signal IN output by the logic matrix circuit board and close a normally open node of the relay module; A power supply module (3) is connected to the relay module (2).

2. The unit operating condition simulation circuit for protection and commissioning of a pumped storage power station according to claim 1, characterized in that: It also includes a button and indicator light module connected to the logic matrix circuit board (1).

3. The unit operating condition simulation circuit for protection and commissioning of a pumped storage power station according to claim 2, characterized in that: The button and indicator light module includes a device power button indicator light, a working condition button indicator light and an auxiliary contact button indicator light.

4. The unit operating condition simulation circuit for protection and commissioning of a pumped storage power station according to claim 1, characterized in that: The power module (3) comprises a lithium battery (301) and a charging unit (302).

5. The unit operating condition simulation circuit for protection and commissioning of a pumped storage power station according to claim 1, characterized in that: The relay module (2) is connected to the terminal of the unit protection device via an aviation plug.

Images