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

Abstract

The invention discloses a pumped storage group protection debugging operation condition simulation method and circuit. The method comprises the following steps: establishing a pumped storage group protection operation condition row vector; s2, establishing a pumped storage unit protection auxiliary contact opening signal column vector; s3, the relation between each operation condition of pumped storage unit protection and the pumped storage unit protection auxiliary contact is counted; s4, establishing a mapping relation matrix between the pumped storage unit protection operation condition row vector and the pumped storage unit protection auxiliary contact opening signal column vector; and S5, in actual operation, correcting a matrix mapping relation between the row vector of the pumped storage unit protection operation condition and the column vector of the pumped storage unit protection auxiliary contact opening-in signal. The circuit comprises a logic matrix circuit board (1), a relay module (2) and a power supply module (3). The method has the characteristic that the working efficiency and the safety and reliability can be effectively improved.

Description

Technical Field

[0001] The invention relates to the field of operating condition simulation of a pumped storage power station, in particular to an operating condition simulation method and circuit for a unit used for protection and commissioning of a pumped storage power station. Background Art

[0002] The units of pumped storage power stations support various operating conditions such as power generation operation, power generation phase adjustment, pumping operation, pumping phase adjustment, traction machine operation, and traction machine operation. The unit voltage, current, power and other electrical quantities have their own characteristics under each operating condition. The unit relay protection device identifies the operating conditions through the position signals of the unit switches, knife switches, etc. or the monitoring condition information. According to the electrical quantity characteristics of different operating conditions, it opens or locks specific protection functions to achieve protection of the primary equipment of the power station. During the unit protection debugging process, since the primary equipment such as the outlet switch and the phase-changing knife are under maintenance and cannot actually operate, it is necessary to remove and short-circuit the secondary wiring to simulate various operating conditions.

[0003] At present, when the operation and maintenance personnel are debugging, one person needs to short-circuit the signal behind the screen, and the other person needs to check the input information in front of the screen to confirm that the operating condition is set successfully, which is inefficient. At the same time, the strong current terminals involved in the judgment of the operating condition are frequently disconnected and connected, which is inefficient and has a greater risk of electric shock, terminal damage, disconnection and wiring errors, and equipment malfunction. Summary of the invention

[0004] The purpose of the present invention is to provide a method and circuit for simulating the working condition of a unit for protection and commissioning of a pumped storage power station. The present invention has the characteristics of effectively improving working efficiency and safety and reliability.

[0005] The technical solution of the present invention is a method for simulating the operating conditions of a unit for protection and commissioning of a pumped storage power station, comprising the following steps:

[0006] S1. Count the number of operating conditions m of the pumped storage unit protection, number each condition, and establish a row vector GK of the pumped storage unit protection operating conditions;

[0007] S2. Count the number of pumped storage unit protection auxiliary contact signals n, and establish a pumped storage unit protection auxiliary contact input signal column vector IN;

[0008] S3. Count the relationship between each operating condition of the pumped storage unit protection and the auxiliary contact of the pumped storage unit protection;

[0009] S4, according to step S3, establish a mapping relationship matrix Z0 between the pumped storage unit protection operating condition row vector GK and the pumped storage unit protection auxiliary contact input signal column vector IN;

[0010] S5. During the actual operation of the pumped-storage unit, according to the physically exclusive relationship between the protection auxiliary contact signals of the pumped-storage unit in step S2, 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, and the corrected mapping relationship matrix is ​​Z.

[0011] In the aforementioned method for simulating operating conditions of protection and debugging of pumped-storage units, in step S1, the operating conditions of the protection of the pumped-storage unit 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 / or circuit breaker opening conditions.

[0012] In the aforementioned method for simulating the operating condition of the protection and debugging of the pumped-storage unit, in step S2, the pumped-storage unit protection auxiliary contact signal includes the generator circuit breaker closing position, the generator circuit breaker opening position, the generating phase-changing switch closing position, the pumping phase-changing switch closing position, the phase-changing switch opening position, the dragging switch closing position, the dragged switch closing position, the electric brake switch closing position, the generator phase adjustment mode monitoring input and / or the black start operating mode input.

[0013] A pumped storage unit protection debugging operation condition simulation circuit, including a logic matrix circuit board, used to realize the mapping relationship between the unit operation condition and the protection input;

[0014] The relay module connected to the logic matrix circuit board is used to receive the weak current signal output by the logic matrix circuit board to close the normally open node of the relay module;

[0015] A power module connected to the relay module.

[0016] The aforementioned unit operating condition simulation circuit for protection and debugging of the pumped storage power station also includes a button indicator light module connected to the logic matrix circuit board.

[0017] In the aforementioned unit operating condition simulation circuit for protection and commissioning of the pumped storage power station, the button indicator light module includes a device power button indicator light, an operating condition button indicator light and an auxiliary contact button indicator light.

[0018] In the aforementioned unit operating condition simulation circuit for protection and commissioning of a pumped storage power station, the power module includes a lithium battery and a charging unit.

[0019] In the aforementioned unit operating condition simulation circuit for protection and commissioning of a pumped storage power station, the relay module is connected to the terminal of the unit protection device via an aviation plug.

[0020] Compared with the prior art, the present invention forms an operating condition simulation circuit through a logic matrix circuit board, a relay module and a power module. The logic matrix circuit board is used to realize the mapping relationship between the unit operating condition and the protection input, and the relay module is used to receive the weak current signal IN output by the logic matrix circuit board, so that the normally open node of the relay module is closed. Through this circuit, the unit operating condition can be simulated with one click, avoiding repeated disconnection and wiring work, significantly improving the debugging work efficiency and safety, and effectively alleviating the current serious shortage of pumped storage relay protection professionals. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a circuit diagram of the present invention;

[0022] Figure 2 This is the schematic diagram of the logic matrix circuit board.

[0023] The markings in the attached figure are: 1-logic matrix circuit board, 2-relay module, 3-power module, 301-lithium battery, 302-charging unit. DETAILED DESCRIPTION

[0024] 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.

[0025] Embodiment. A method for simulating the operating conditions of a unit for protection and commissioning of a pumped storage power station, the specific steps are as follows:

[0026] (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.

[0027] (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.

[0028] (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.

[0029] (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;

[0030] Table 1

[0031]

[0032]

[0033] (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.

[0034]

[0035]

[0036] (6) Use the following circuit boards: Figure 1-2 As shown, the above method is implemented by at least including a power module 3, a button indicator light module, a logic matrix circuit board 1, a relay module 2, and an aviation plug.

[0037] a. The power module 3 includes a lithium battery 301 and a charging unit 302, which are used to realize the power supply and charging function of the operating condition simulation device;

[0038] b. Button indicator module, including the device power button indicator, working condition button indicator and auxiliary contact button indicator; the device power button indicator is used to realize the overall power-on function of the device and indicate the result of device activation; the working condition button indicator is used to realize the working condition output function, indicate the working condition result, and light up the auxiliary contact button indicator corresponding to the working condition; at the same time, the circuit can also simulate abnormal operating conditions through custom auxiliary contact combinations. For example, in the simulated pumping operation condition, the pumping phase change knife position signal is lost

[0039] c. Logic matrix circuit board, including circuit board, diodes and jumpers, used to realize the mapping relationship between operating conditions and protection input; on the circuit board, the horizontal stripe represents the operating condition, and the operating condition button connected in series introduces the weak current power supply circuit to reflect the operating condition; 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 condition and the auxiliary contact, 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 expressed 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, the weak point signal is output to the relay module.

[0040] d. Relay module, used to receive the weak current signal IN output by the logic matrix circuit board, so that the normally open node of the relay is closed; the common end is connected to the common end 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 as to send the working condition signal or the manual control auxiliary node signal WJ to the protection device;

[0041] e. Aviation plug, to connect the working condition signal of the working condition simulation device or the manual output signal with the terminals of the unit protection device.

[0042] The present application relates to a method for simulating the operating conditions of a pumped-storage power station unit, which is implemented by a diode circuit and simplifies the protection and debugging process through one-button operation, thereby eradicating the current problems of low efficiency in the protection and debugging operating condition simulation of the pumped-storage unit, terminal damage, disconnection and wiring errors, etc.

Claims

1. A method for simulating operating conditions of protection and commissioning of a pumped storage unit, characterized in that: The following steps are involved: S1. Count the number of operating conditions m of the pumped storage unit protection, number each condition, and establish a row vector GK of the pumped storage unit protection operating conditions; S2. Count the number of pumped storage unit protection auxiliary contact signals n, and establish a pumped storage unit protection auxiliary contact input signal column vector IN; S3. Count the relationship between each operating condition of the pumped storage unit protection and the auxiliary contact of the pumped storage unit protection; S4, according to step S3, establish a mapping relationship matrix Z0 between the pumped storage unit protection operating condition row vector GK and the pumped storage unit protection auxiliary contact input signal column vector IN; S5. During the actual operation of the pumped-storage unit, according to the physically exclusive relationship between the protection auxiliary contact signals of the pumped-storage unit in step S2, 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, and the corrected mapping relationship matrix is ​​Z.

2. A method for simulating operating conditions of protection and commissioning of a pumped storage unit according to claim 1, characterized in that: In step S1, the operating conditions of the pumped storage unit protection 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 / or circuit breaker opening conditions.

3. A method for simulating operating conditions of protection and commissioning of a pumped storage unit according to claim 1, characterized in that: In step S2, the auxiliary contact signals for the protection of the pumped-storage unit include the closing position of the generator circuit breaker, the opening position of the generator circuit breaker, the closing position of the generating 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 / or the black start operating mode input.

4. A simulation circuit for simulating the operating condition of a pumped storage unit protection and debugging according to any one of claims 1 to 3, characterized in that: It comprises 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 the weak current signal output by the logic matrix circuit board to close the normally open node of the relay module; A power module (3) connected to the relay module (2).

5. The pumped storage unit protection and debugging operation condition simulation circuit according to claim 4 is characterized in that: It also includes a button indicator light module connected to the logic matrix circuit board (1).

6. The pumped storage unit protection and debugging operation condition simulation circuit according to claim 5 is characterized in that: The button indicator light module includes a device power button indicator light, a working condition button indicator light and an auxiliary contact button indicator light.

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

8. The unit operating condition simulation circuit for protection and commissioning of a pumped storage power station according to claim 4, characterized in that: The relay module (2) is connected to the terminal of the unit protection device via an aviation plug.

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