High-temperature reactor excitation system control logic circuit

Abstract

The embodiment of the utility model provides a control logic circuit of a high-temperature reactor excitation system. The control logic circuit comprises an AND gate circuit and a first OR gate circuit which are connected in sequence, the input end of the AND gate circuit is respectively used for accessing an automatic voltage control system exit signal and a manual voltage control signal; the input end of the first OR gate circuit is also used for accessing an automatic voltage control signal, and the output end of the OR gate circuit is used for outputting a voltage control instruction to an excitation system. According to the control logic circuit of the high-temperature reactor excitation system, interlocking logic is added between an automatic voltage control system and manual voltage control, the automatic voltage control system must exit during manual increase and decrease of magnetism, the manual voltage control cannot be operated when the automatic voltage control system does not exit, and the manual voltage control cannot be operated when the automatic voltage control system does not exit. The automatic voltage control system magnet increasing and decreasing and manual magnet increasing and decreasing are reasonably matched, and it is guaranteed that the voltage is safely and stably adjusted when a unit operates.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the field of electrical technology, and specifically relate to a control logic circuit of a high-temperature reactor excitation system. Background Art

[0002] The increase and decrease of magnetic field of the automatic voltage control system (AVC) of the high-temperature gas-cooled reactor is not interlocked with the increase and decrease of magnetic field of the manual voltage control, which may cause the power plant to adjust the unit voltage (the unit is reactive after being connected to the grid) manually and the power grid at the same time. In serious cases, the two systems may even adjust in the opposite direction, which has an extremely adverse effect on the voltage control of the generator unit excitation system and threatens the safe and stable operation of the unit.

[0003] In addition, when the excitation system fails, if the automatic voltage control system is not exited in time, automatic increase or decrease of magnetism may occur, thereby aggravating the excitation system failure and causing more serious failure of the generator set. Utility Model Content

[0004] The embodiment of the present disclosure aims to solve at least one of the technical problems existing in the prior art, and provides a control logic circuit of a high temperature reactor excitation system, comprising an AND gate circuit and a first OR gate circuit connected in sequence;

[0005] The input ends of the AND gate circuit are respectively used to access the automatic voltage control system exit signal and the manual voltage control signal;

[0006] The input end of the first OR gate circuit is also used to receive an automatic voltage control signal, and the output end of the OR gate circuit is used to output a voltage control instruction to the excitation system.

[0007] Optionally, the manual voltage control signal is a manual magnetization signal, and the automatic voltage control signal is an automatic magnetization signal.

[0008] Furthermore, the voltage control instruction is a magnetization instruction.

[0009] Optionally, the manual voltage control signal is a manual demagnetization signal, and the automatic voltage control signal is an automatic demagnetization signal.

[0010] Furthermore, the voltage control instruction is a demagnetization instruction.

[0011] Optionally, the logic circuit further includes an alarm locking circuit, and the circuit includes a second OR gate circuit;

[0012] The input end of the second OR gate circuit is used to access the alarm signal of the excitation system;

[0013] The output end of the second OR gate circuit is used to output a comprehensive alarm signal to the automatic voltage control system to lock the automatic voltage control system.

[0014] Optionally, the excitation system alarm signal includes a regulator A set fault signal, a regulator B set fault signal, a regulator alarm signal, a comprehensive limit alarm signal, and a power cabinet fault signal.

[0015] A control logic circuit of a high-temperature reactor excitation system in an embodiment of the present disclosure adds an interlocking logic between the automatic voltage control system and the manual voltage control. When the magnetic field is increased or decreased manually, the automatic voltage control system must exit. When the automatic voltage control system has not exited, the manual voltage control cannot be operated, so that the magnetic field increase or decrease of the automatic voltage control system and the manual increase or decrease of the magnetic field are reasonably coordinated to ensure safe and stable voltage regulation of the unit during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a control logic circuit of a high temperature reactor excitation system according to an embodiment of the present disclosure;

[0017] Figure 2 It is a schematic diagram of the structure of an alarm lockout circuit according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0019] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0020] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0021] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, the first component discussed below can be referred to as the second component without departing from the teachings of the concepts of the present disclosure. As used in this disclosure, the term "and / or" includes any one of the associated listed items and all combinations of one or more.

[0022] Those skilled in the art will appreciate that the drawings are merely schematic diagrams of example embodiments, and the modules or processes in the drawings are not necessarily necessary for implementing the present disclosure, and therefore cannot be used to limit the protection scope of the present disclosure.

[0023] like Figure 1 As shown, the logic circuit includes an AND gate circuit and a first OR gate circuit connected in sequence. The input end of the AND gate circuit is used to access the automatic voltage control system exit signal 10 and the manual voltage control signal 20 respectively. The input end of the first OR gate circuit is also used to access the automatic voltage control signal 30, and the output end of the OR gate circuit is used to output a voltage control instruction 40 to the excitation system.

[0024] Specifically, the automatic voltage control system exit signal 10 and the manual voltage control signal 20 must be "1" at the same time to conduct the AND gate circuit. When the automatic voltage control system is put into operation, the automatic voltage control system exit signal 10 is "0", and the AND gate circuit cannot be conducted, thereby locking the manual voltage control. At this time, if the automatic voltage control signal 30 is "1", the first OR gate circuit can be conducted, and the voltage control instruction 40 can be output to the excitation system. The excitation system increases or decreases the magnetism according to the voltage control instruction 40 to adjust the voltage of the generator set. Conversely, when the automatic voltage control system is exited, the automatic voltage control system exit signal 10 is "1". At this time, if the manual voltage control signal 20 is "1", the AND gate circuit and the OR gate circuit can be conducted to realize the manual control of the excitation system to increase or decrease the magnetism and adjust the voltage of the generator set. The manual voltage control signal 20 can be manually issued through a field button or a DCS system.

[0025] A control logic circuit of a high-temperature reactor excitation system in an embodiment of the present disclosure adds an interlocking logic between the automatic voltage control system and the manual voltage control. When the magnetic field is increased or decreased manually, the automatic voltage control system must exit. When the automatic voltage control system has not exited, the manual voltage control cannot be operated, so that the magnetic field increase or decrease of the automatic voltage control system and the manual increase or decrease of the magnetic field are reasonably coordinated to ensure safe and stable voltage regulation of the unit during operation.

[0026] According to the functions that the control logic circuit of the high temperature reactor excitation system needs to realize, that is, sending a magnetization increase instruction or a demagnetization instruction to the excitation system, the manual voltage control signal 20 can be a manual magnetization increase signal or a manual demagnetization signal, and the automatic voltage control signal 30 can be an automatic magnetization increase signal or an automatic demagnetization signal. The signals connected to the corresponding input terminals of the logic circuit can be switched between the above signals, and multiple sets of logic circuits with different input signals can be set to selectively connect to the excitation system.

[0027] For example, Figure 1 As shown, when the manual voltage control signal 20 is a manual magnetization signal, the automatic voltage control signal 30 should also be an automatic magnetization signal. At this time, the voltage control instruction 40 is a magnetization instruction.

[0028] Similarly, for example, Figure 1 As shown, when the manual voltage control signal 20 is a manual demagnetization signal, the automatic voltage control signal 30 should also be an automatic demagnetization signal. At this time, the voltage control instruction 40 is a demagnetization instruction.

[0029] For example, Figure 2 As shown, in order to prevent the automatic increase or decrease of magnetism when the excitation system fails, a high temperature reactor excitation system control logic circuit of the embodiment of the present disclosure also includes an alarm lockout loop 200, and the loop 200 includes a second OR gate circuit. The input end of the second OR gate circuit is used to access the excitation system alarm signal 210. The output end of the second OR gate circuit is used to output a comprehensive alarm signal to the automatic voltage control system 220, so that the automatic voltage control system 220 is locked.

[0030] Specifically, the excitation system alarm signal 210 may include fault alarm signals of multiple excitation systems. When at least one fault alarm signal appears, the input of the corresponding input terminal is "1", and the second OR gate circuit is turned on, thereby outputting a comprehensive alarm signal to the automatic voltage control system 220. After receiving the comprehensive alarm signal, the automatic voltage control system 220 exits the automatic voltage control function and locks the output of the increase or decrease magnetic field instruction.

[0031] For example, Figure 2 As shown, the excitation system alarm signal 210 may include a regulator A set fault signal 211, a regulator B set fault signal 212, a regulator alarm signal 213, a comprehensive limit alarm signal 214, a power cabinet fault signal 215, and the like.

[0032] A high-temperature reactor excitation system control logic circuit of the disclosed embodiment adds an alarm lockout loop, receives a fault alarm signal of the excitation system, and outputs a comprehensive alarm signal to the automatic voltage control system, so as to lock the automatic voltage control function of increasing or decreasing magnetism, thereby preventing the grid from increasing or decreasing magnetism when the excitation system fails, thereby aggravating the excitation system failure and causing a more serious failure of the generator set.

[0033] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A control logic circuit for a high temperature reactor excitation system, characterized in that: The logic circuit includes an AND gate circuit and a first OR gate circuit connected in sequence; The input ends of the AND gate circuit are respectively used to access the automatic voltage control system exit signal and the manual voltage control signal; The input end of the first OR gate circuit is also used to receive an automatic voltage control signal, and the output end of the OR gate circuit is used to output a voltage control instruction to the excitation system.

2. The logic circuit according to claim 1, characterized in that: The manual voltage control signal is a manual magnetization signal, and the automatic voltage control signal is an automatic magnetization signal.

3. The logic circuit according to claim 2, characterized in that: The voltage control instruction is a magnetization instruction.

4. The logic circuit according to claim 1, characterized in that: The manual voltage control signal is a manual demagnetization signal, and the automatic voltage control signal is an automatic demagnetization signal.

5. The logic circuit according to claim 4, characterized in that: The voltage control instruction is a demagnetization instruction.

6. The logic circuit according to any one of claims 1 to 5, characterized in that: The logic circuit also includes an alarm locking loop, and the loop includes a second OR gate circuit; The input end of the second OR gate circuit is used to access the alarm signal of the excitation system; The output end of the second OR gate circuit is used to output a comprehensive alarm signal to the automatic voltage control system to lock the automatic voltage control system.

7. The logic circuit according to claim 6, characterized in that: The excitation system alarm signals include a regulator A set fault signal, a regulator B set fault signal, a regulator alarm signal, a comprehensive limit alarm signal, and a power cabinet fault signal.

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