Control device

Abstract

The invention provides a control device, and the device comprises a switch module which is used for setting in a three-second wiring mode, so as to carry out the electric energy transmission; the control module is used for collecting and receiving position state information of components in the switch module and performing logical operation according to preset locking logic; the output module is used for outputting an operation allowing signal according to the logic operation result. The position state information of the components in the switch module is collected and received through the control module, logic operation is carried out according to preset locking logic, the locking logic can be flexibly adjusted according to actual working conditions so as to meet different operation requirements, and abnormal conditions can be found and processed in time. The output module outputs an operation allowing signal according to a logical operation result, and ensures that opening and closing operations of components are allowed only under a safe condition, so that the automation and intelligence level of an electrical main wiring system is improved, the possibility of manual misoperation is reduced, various changes can be responded more quickly, and the operation efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of power equipment control, and particularly relates to a control device. Background Art

[0002] In a power system, especially in a 500 kV electrical main connection system, to enhance the flexibility of the operation mode, a two-out-of-three breaker connection mode is usually adopted. In the switching operation of electrical equipment in this connection mode, to avoid electrical misoperation, strict electrical interlocking and other safety measures need to be taken. However, the traditional electrical interlocking method has the problems of being single and not completely reliable. Especially in high-voltage equipment, misoperation may cause serious personal and equipment damage.

[0003] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely explaining the technical solutions of this application and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art just because these solutions are described in the background art part of this application. Summary of the Invention

[0004] The purpose of this application is to solve at least one of the technical problems in the related technologies to a certain extent.

[0005] Therefore, the first object of this application is to propose a control device.

[0006] The second object of this application is to propose a control system.

[0007] To achieve the above object, an embodiment of the first aspect of this application proposes a control device, including:

[0008] Three switch modules, each of the switch modules is connected in series between the first bus and the second bus for the two-out-of-three connection mode setting to conduct power transmission;

[0009] A control module, which is used to collect and receive the position status information of the components in the switch module and perform logical operations according to the preset interlocking logic;

[0010] An output module, which is used to output an operation permission signal according to the result of the logical operation. Among them, the operation permission signal forms a control loop in the switch module to control the opening and closing operations of the components.

[0011] To achieve the above object, an embodiment of the second aspect of this application proposes a control system, and the control system includes the control device proposed in the embodiment of the first aspect of this application.

[0012] In the embodiments of the present application, the control module collects and receives the position status information of the components in the switch module, and performs logical operations according to the preset locking logic. The locking logic can be flexibly adjusted according to the actual working conditions to meet different operation requirements, and abnormal conditions can also be detected and processed in a timely manner. The output module outputs an operation permission signal according to the result of the logical operation, ensuring that the opening and closing operations of the components are only allowed under safe conditions, improving the automation and intelligence level of the electrical main wiring system, reducing the possibility of human misoperation, being able to respond to various changes faster, and improving the operation efficiency.

[0013] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0015] Figure 1 is a schematic structural diagram of a control device provided by an embodiment of the present application;

[0016] Figure 2 is an electrical main wiring diagram of a two-thirds wiring method provided by an embodiment of the present application;

[0017] Figure 3 is a wiring diagram of the control module provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0019] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms "a" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0020] It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the embodiments of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "when" as used herein may be interpreted as "when...", "while...", or "in response to determining".

[0021] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0022] In a 500 kV electrical main connection system, in order to improve the flexibility and adaptability of the operation mode, a breaker-and-a-half or breaker-three-quarter wiring configuration is usually adopted. Specifically, this configuration involves a layout design where each string contains three switches and two outgoing / incoming lines, or four switches and three outgoing / incoming lines.

[0023] Regarding the switching operation of electrical equipment in a 500 kV electrical main connection system, to avoid electrical misoperation, in addition to requiring operators to strictly confirm the equipment status before operation, preventive measures of adding electrical interlocks in the control circuits of electrical equipment are usually taken. The core of this measure lies in further ensuring the safe operation of the 500 kV electrical main connection system through a carefully designed electrical interlock mechanism.

[0024] Existing electrical interlock methods mainly achieve the interlock function by leading out the position contacts of circuit breakers, disconnectors, and earthing switches, and connecting these position contacts in series in the operation circuits of the corresponding equipment according to the operation logic of electrical equipment. However, this electrical interlock method completely depends on the accuracy of the position contacts and only uses single-contact interlocks, which still poses a certain risk of misoperation for disconnectors and earthing switches. Given that misoperation of equipment at the 500 kV voltage level will cause serious damage to equipment and personnel, it is particularly important to explore and implement a more perfect and reliable interlock method. This aims to minimize the possibility of misoperation and ensure the safe and stable operation of the power system.

[0025] A control device according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0026] Figure 1 A schematic structural diagram of a control device provided for an embodiment of the present application.

[0027] AsFigure 1 As shown, the control device includes but is not limited to: three switch modules, a control module, and an output module, where:

[0028] Each switch module is arranged in series between the first bus and the second bus (where the voltages of the first bus and the second bus can be 500 KV) for a 2 / 3 wiring mode setting. In the 2 / 3 wiring mode, the three switch modules are connected in series to form a string. The switch modules in this string are divided into edge switch modules and intermediate switch modules (or tie switch modules). The edge switch modules are directly connected to the bus, while the intermediate switch modules are located between two edge switch modules, serving as a connection and backup.

[0029] In some embodiments, if the power system is operating normally, all switch modules are in the closed state, and electric energy is transmitted through the bus (including the first bus and the second bus), switch modules, and transmission lines; if any one of the switch modules fails, the power system can quickly switch to the standby state and continue to transmit electric energy through other switch modules, thus ensuring the stable operation of the power system.

[0030] As Figure 1 shown, the control module is connected to each switch module and real-time collects the position status information of the components in the switch module (these position status information include whether the components are in the closed, open, or other specific states). After receiving the position status information of the switch module, the control module performs logical operations according to the preset interlocking logic. The interlocking logic is a set of rules and conditions used to ensure the safe operation of the power system under specific circumstances (such as faults or maintenance); the preset interlocking logic may include: anti-misoperation logic (preventing operators from operating the switch module without authorization or in inappropriate situations), fault isolation logic (automatically isolating the fault area when a fault is detected to prevent the spread of the fault and protect the normal operation of other parts), standby switching logic (automatically switching to the standby switch module when a certain switch module fails to ensure continuous power supply to the power system), etc.

[0031] As Figure 1 shown, the output module is connected between the control module and each switch module. Based on the result of the logical operation, the control module sends corresponding control instructions to the output module. According to the control instructions, the output module generates an operation permission signal, which is transmitted to the corresponding switch module. Among them, the operation permission signal forms a control loop in the switch module. Through the control loop, the output module can accurately control the state of the components inside the switch module, thereby controlling the opening and closing operations of the components.

[0032] Optionally, as an example, Figure 2It is the electrical main wiring diagram of the two-thirds wiring method provided according to the embodiments of the present application.

[0033] As Figure 1 and Figure 2 shown, each switch module includes a circuit breaker, two disconnect switches, and two earthing switches. Among them, the first disconnect switch is arranged close to the first busbar; the second disconnect switch is arranged close to the second busbar; the circuit breaker is connected between the first disconnect switch and the second disconnect switch; the first earthing switch is connected to the first end of the circuit breaker; the second earthing switch is connected to the second end of the circuit breaker.

[0034] It should be noted that when generating electricity, the circuit breaker, the first disconnect switch, and the second disconnect switch are in the closed position, and the first earthing switch and the second earthing switch are in the open position; if the circuit breaker is in the maintenance state, the circuit breaker, the second disconnect switch, and the first disconnect switch are sequentially adjusted from the closed position to the open position, and the first earthing switch and the second earthing switch are adjusted from the open position to the closed position.

[0035] Furthermore, as Figure 2 shown, the electrical main wiring diagram includes three switch modules, namely the first side switch module close to the first busbar, the second side switch module close to the second busbar, and the middle switch module. Among them, the first side switch module includes circuit breaker CB1, disconnect switch DS1 (the first disconnect switch), disconnect switch DS2 (the second disconnect switch), earthing switch ES1 (the first earthing switch), and earthing switch ES2 (the second earthing switch); the middle switch module includes circuit breaker CB2, disconnect switch DS3 (the first disconnect switch), disconnect switch DS4 (the second disconnect switch), earthing switch ES3 (the first earthing switch), and earthing switch ES4 (the second earthing switch); the second side switch module includes circuit breaker CB3, disconnect switch DS5 (the first disconnect switch), disconnect switch DS6 (the second disconnect switch), earthing switch ES5 (the first earthing switch), and earthing switch ES6 (the second earthing switch).

[0036] It should be added that circuit breaker CB1, circuit breaker CB2, and circuit breaker CB3 form a complete string. When the complete string of the two-thirds wiring is in the normal operation state, Figure 2All circuit breakers and disconnectors are in the closed position, and all earthing switches are in the open position. When the power system undergoes a state conversion, the states of the circuit breakers, disconnectors, and earthing switches need to be converted. Since a circuit breaker has the ability to extinguish arcs and can close and interrupt current; while a disconnector does not have the ability to extinguish arcs and can only be used as a disconnecting point from live equipment, and an earthing switch is used to ensure the safety of maintenance personnel when carrying out maintenance work on electrical equipment. In addition, to prevent malicious electrical misoperations, it is required to prevent pulling (closing) a disconnector with load; prevent hanging (closing) an earthing switch while energized; prevent closing a circuit breaker (disconnector) with a grounding wire connected.

[0037] Furthermore, as Figure 2 shown, the electrical main wiring diagram also includes: a disconnector DS9 near the first busbar (the disconnector DS9 is connected to the disconnector DS2 and the disconnector DS3), an earthing switch ES9 and an earthing switch ES10 connected to the disconnector DS9, a disconnector DS10 near the second busbar (the disconnector DS10 is connected to the disconnector DS4 and the disconnector DS5), an earthing switch ES11 and an earthing switch FES11 connected to the disconnector DS10, an earthing switch FES41 connected to the first busbar, and an earthing switch FES42 connected to the second busbar.

[0038] It should be noted that, combined with the equipment characteristics and operation requirements, the electrical equipment interlock logic is set as follows: when the disconnector is operated for opening or closing, the circuit breaker and the earthing switches electrically connected to the circuit breaker must be in the open position; when the earthing switch is operated for opening or closing, the disconnector electrically connected to it must be in the open position.

[0039] Based on the above principles, taking the circuit breaker CB1 as an example, the operation interlock logic is as follows:

[0040] When the disconnector DS1 is opened or closed, it is satisfied that: the circuit breaker CB1 is in the open position, the earthing switch ES1 is in the open position, the earthing switch ES2 is in the open position, and the earthing switch FES41 is in the open position;

[0041] When the disconnector DS2 is opened or closed, it is satisfied that: the circuit breaker CB1 is in the open position, the earthing switch ES1 is in the open position, the earthing switch ES2 is in the open position, and the earthing switch ES9 is in the open position;

[0042] When the earthing switch ES1 is opened or closed, it is satisfied that: the disconnector DS1 is in the open position and the disconnector DS2 is in the open position;

[0043] When the earthing switch ES2 is opened or closed, it is satisfied that: the disconnector DS1 is in the open position and the disconnector DS2 is in the open position.

[0044] Optionally, as an example, Figure 3The wiring diagram of the control module provided according to the embodiments of the present application.

[0045] As Figure 3 shown, the control module includes: an acquisition sub-module and a logic processing sub-module, where:

[0046] The acquisition sub-module is the front-end part of the control module, responsible for receiving the position status information of the components in the switch module and the operation instruction information from the outside. The acquisition sub-module includes a plurality of digital input interfaces, which are designed to receive and convert the position status information of the components in the switch module. These position status information are usually represented in the form of digital signals, such as the closed or open state of the components. In addition, the acquisition sub-module also has the function of receiving the operation instruction information from the outside. These operation instruction information may come from the operator's control panel, remote control system or other automation systems; the acquisition sub-module converts these operation instruction information into signals recognizable by the power system for the subsequent logic sub-module to use.

[0047] As Figure 3 shown, the logic sub-module is connected to the acquisition sub-module and performs logical operations on the position status information provided by the acquisition sub-module based on the preset interlock logic. These operations may include judging the current state of the components, checking the validity of the operation instructions, and verifying whether the execution conditions are met, etc. Based on the logical operation results, the logic sub-module will generate corresponding control instructions, and these control instructions will be passed to the output module to perform corresponding operations.

[0048] Further, as Figure 3 shown, the number of digital input interfaces can be 24. Each switch module may contain multiple components, and each component requires a corresponding digital input interface to monitor its status. Therefore, the number and type of components in the switch module will directly affect the number of digital input interfaces required.

[0049] Further, the logic processing sub-module may include a programmable logic controller, a field programmable gate array, a microprocessor, a microcontroller, an application specific integrated circuit, etc.

[0050] As an example, as Figure 2 shown, if the logic processing sub-module is set by using a programmable logic controller, the preset interlock logic may include:

[0051] If the circuit breaker is in the open position, and the first grounding switch and the second grounding switch are in the open position, the first disconnecting switch and the second disconnecting switch are allowed to perform open operations;

[0052] If the first disconnecting switch and the second disconnecting switch are both in the open position, the first grounding switch and the second grounding switch are allowed to perform closing operations;

[0053] Before the first disconnecting switch or the second disconnecting switch performs opening and closing operations, the circuit breaker is in the open position, and the first grounding knife switch or the second grounding knife switch is in the open position;

[0054] If a closing command for the first disconnecting switch or the second disconnecting switch is received and the closing condition is met, the logic processing sub-module generates a closing permission command, and before the first disconnecting switch or the second disconnecting switch completes the closing operation, the logic processing sub-module maintains the closing permission command;

[0055] If an opening command for the first disconnecting switch or the second disconnecting switch is received and the opening condition is met, the logic processing sub-module generates an opening permission command, and before the first disconnecting switch or the second disconnecting switch completes the opening operation, the logic processing sub-module maintains the opening permission command;

[0056] If a closing command for the first grounding knife switch or the second grounding knife switch is received and the closing condition is met, the logic processing sub-module generates a closing permission command, and before the first grounding knife switch or the second grounding knife switch completes the closing operation, the logic processing sub-module maintains the closing permission command;

[0057] If an opening command for the first grounding knife switch or the second grounding knife switch is received and the opening condition is met, the logic processing sub-module generates an opening permission command, and before the first grounding knife switch or the second grounding knife switch completes the opening operation, the logic processing sub-module maintains the opening permission command.

[0058] Optionally, as an example, the output module includes a plurality of digital output interfaces, which are respectively used to output, according to the logic operation result, an operation permission signal for forming a control loop in the switch module and controlling the opening and closing operations of the components. Specifically, when it comes to digital output, the output module outputs an operation permission signal in the form of high and low level signals, and these high and low level signals are used to form a control loop in the switch module and control the opening and closing operations of the components. It should be noted that in some interlocking logics, the control module generates and maintains an operation permission command (such as a closing permission command, an opening permission command), and according to the operation permission command, the output module outputs the corresponding operation permission signal.

[0059] More specifically, the number of digital output interfaces can be 4. It should be noted that the digital output interface converts the logical operation results of the control module and the operation permission instructions into operation permission signals that can be recognized by external devices. These operation permission signals can be switch signals, which are used to control the start, stop, opening, closing, etc. of the components in the switch module. When designing the digital output interface, factors such as load type, load current, voltage level, and action frequency are usually considered, and then the appropriate interface type (including relay type, transistor type, thyristor type, etc.) and the number of interfaces are selected according to the specific application scenario and requirements.

[0060] As an example, as Figure 2 and Figure 3 shown, the 24 digital input interfaces in the acquisition sub-module are respectively named: I1, I2, I3, I4, I5, I6, I7, I8, I9, IA, IB, IC, X1, X2, X3, X4, X5, X6, X7, X8, X9, XA, XB, XC. The four outputs of the logic processing sub-module are: Q1, Q2, Q3, Q4.

[0061] Furthermore, as Figure 2 and Figure 3 shown, the corresponding relationships of the digital input interfaces and the corresponding relationships of the four outputs are as follows:

[0062] I1 is the opening position of circuit breaker CB1 (CB1 open position); I3 is the manual operation button of grounding switch ES2 (SB4 ES2 manual operation button); I4 is the opening position of disconnecting switch DS1 (DS1 open position); I5 is the opening position of disconnecting switch DS2 (DS2 open position); I6 is the opening position of grounding switch ES1 (ES1 open position); I7 is the opening position of grounding switch ES2 (ES2 open position); I8 is the opening position of grounding switch ES9 (ES9 open position); I9 is the opening position of grounding switch FES41 (FES41 open position); IA is the manual operation button of disconnecting switch DS1 (SB1 DS1 manual operation button); IB is the manual operation button of disconnecting switch DS2 (SB2 DS2 manual operation button); IC is the manual operation button of grounding switch ES1 (SB3 ES1 manual operation button); X1 is the closing command of disconnecting switch DS1 (DS1 closing command); X2 is the opening command of disconnecting switch DS1 (DS1 opening command); X3 is the closing command of disconnecting switch DS2 (DS2 closing command); X4 is the opening command of disconnecting switch DS2 (DS2 opening command); X5 is the closing command of grounding switch ES1 (ES1 closing command); X6 is the opening command of grounding switch ES1 (ES1 opening command); X7 is the closing command of grounding switch ES2 (ES2 closing command); X8 is the opening command of grounding switch ES2 (ES2 opening command); X9 is the closing position of disconnecting switch DS1 (DS1 closed position); XA is the closing position of disconnecting switch DS2 (DS2 closed position); XB is the closing position of grounding switch ES1 (ES1 closed position); XC is the closing position of grounding switch ES2 (ES2 closed position); Q1 is the closing and opening permission signal of disconnecting switch DS1; Q2 is the closing and opening permission signal of disconnecting switch DS2; Q3 is the closing and opening permission signal of grounding switch ES1; Q4 is the closing and opening permission signal of grounding switch ES2.

[0063] Furthermore, as Figure 2 and Figure 3 shown, the symbol "&" represents the logical relationship of "AND", that is, the conditions must be met simultaneously; the symbol "|" represents the logical relationship of "OR", that is, any one of the conditions is satisfied; "()" represents the priority of the operation level; the input (switch input) is represented by a capital letter, and the non-input (switch not input, also called output) is represented by a lowercase letter. For example, X9 represents the input of the closing position of disconnecting switch DS1, and x9 represents the non-input of the closing position of disconnecting switch DS1; introducing intermediate variables M1 to ME, the logical operation of the logical processing sub-module is set as:

[0064] Line001: When I1 is input, output M1, that is, when the opening position of circuit breaker CB1 is input, output M1.

[0065] Line002: When I9 is input, M2 is output, that is, when the opening position of the earthing switch FES41 is input, M2 is output.

[0066] Line003: When I4 is input & I5 is input, M3 is output, that is, when the opening position of the disconnecting switch DS1 is input & the opening position of the disconnecting switch DS2 is input, M3 is output.

[0067] Line004: When I6 is input & I7 is input, M3 is output, that is, when the opening position of the earthing switch ES1 is input & the opening position of the earthing switch ES2 is input, M4 is output.

[0068] Line005: When M1 is input & M4 is input & M2 is input, M5 is output, that is, when the opening position of the circuit breaker CB1 is input & the opening position of the earthing switch ES1 is input & the opening position of the earthing switch ES2 is input & the opening position of the earthing switch FES41 is input, M5 is output, and when M5 is output, it indicates that the operation of the disconnecting switch DS1 meets the interlocking condition.

[0069] Line006: When M5 is input & X1 is input & x9 is output, M7 is output, that is, when the opening position of the circuit breaker CB1 is input & the opening position of the earthing switch ES1 is input & the opening position of the earthing switch ES2 is input & the closing command of the disconnecting switch DS1 is input & the disconnecting switch DS1 is not in the closing position, M7 is output.

[0070] Line007: M7 and X1 input form an "OR" relationship, that is, when M7 is conducting, if it meets the conditions of the opening position of the circuit breaker CB1 being input & the opening position of the earthing switch ES1 being input & the opening position of the earthing switch ES2 being input & the opening position of the earthing switch FES41 being input & the disconnecting switch DS1 not being in the closing position, the output of M7 is self - held; after the closing command of the disconnecting switch DS1 is input, before the disconnecting switch DS1 changes from open to closed, M7 can continuously output through the self - held contact to ensure that the disconnecting switch DS1 can be reliably closed.

[0071] Line008: When M5 is input & X2 is input & i4 is output, M8 is output, that is, when the opening position of the circuit breaker CB1 is input & the opening position of the earthing switch ES1 is input & the opening position of the earthing switch ES2 is input & the opening position of the earthing switch FES41 is input & the opening command of the disconnecting switch DS1 & the disconnecting switch DS1 is not in the opening position, M8 is output.

[0072] Line009: The inputs of M8 and X2 are in an "OR" relationship. That is, when M8 is conducting, if the breaker CB1 is in the open position input & the grounding switch ES1 is in the open position input & the grounding switch ES2 is in the open position input & the grounding switch FES41 is in the open position input & the disconnecting switch DS1 is not in the open position, the output of M8 is self - held; after the opening command of the disconnecting switch DS1 is input, before the disconnecting switch DS1 reaches the open position from the closed position, M7 can continuously output through the self - holding contact to ensure that the disconnecting switch DS1 can be reliably opened.

[0073] Line010: When M7 is input, Q1 is output. That is, when the closing command of the disconnecting switch DS1 and the closing operation conditions are met, the signals allowing the opening and closing operations of the disconnecting switch DS1 are output.

[0074] Line011: When M8 is input, Q1 is output. That is, when the opening command of the disconnecting switch DS1 and the opening operation conditions are met, the signals allowing the opening and closing operations of the disconnecting switch DS1 are output.

[0075] Line012: When IA is input & M5 is input, Q1 is output. That is, when the manual operation button of the disconnecting switch DS1 is input & the breaker CB1 is in the open position input & the grounding switch ES1 is in the open position input & the grounding switch ES2 is in the open position input & the grounding switch FES41 is in the open position input, the signals allowing the opening and closing operations of the disconnecting switch DS1 are output.

[0076] Among them, Line010, Line011, and Line012 are in an "OR" relationship. That is, when any condition is met, the signals allowing the opening and closing operations of the disconnecting switch DS1 can be output.

[0077] Line013: When M1 is input & M4 is input & I8 is input, M6 is output. That is, when the breaker CB1 is in the open position input & the grounding switch ES1 is in the open position input & the grounding switch ES2 is in the open position input & the grounding switch ES9 is in the open position input, M6 is output, and when M6 is output, it indicates that the operation of the DS2 disconnecting switch meets the interlocking conditions.

[0078] Line014: When M6 is input & X3 is input & xA is input, M9 is output. That is, when the breaker CB1 is in the open position input & the grounding switch ES1 is in the open position input & the grounding switch ES2 is in the open position input & the grounding switch ES9 is in the open position input & the closing command of the DS2 disconnecting switch & the disconnecting switch DS2 is not in the closed position, M9 is output.

[0079] Line015: The inputs of M9 and X3 are in an "OR" relationship. That is, when M9 is conducting, if the breaker CB1 is in the open position input & the earthing switch ES1 is in the open position input & the earthing switch ES2 is in the open position input & the earthing switch ES9 is in the open position input & the disconnecting switch DS2 is not in the closing position, the output of M9 can be self - held; after the closing command of the disconnecting switch DS2 is input, before the disconnecting switch DS2 changes from open to closed, M9 can continuously output through the self - holding contact to ensure that the disconnecting switch DS2 can be reliably closed.

[0080] Line016: The inputs of M6 & X4 and the output of i5 result in the output of MA, that is, the breaker CB1 is in the open position input & the earthing switch ES1 is in the open position input & the earthing switch ES2 is in the open position input & the earthing switch ES9 is in the open position input & the opening command of the disconnecting switch DS2 is input & the disconnecting switch DS2 is not in the open position, then the output is MA.

[0081] Line017: The inputs of MA and X4 are in an "OR" relationship. That is, when MA is conducting, if the breaker CB1 is in the open position input & the earthing switch ES1 is in the open position input & the earthing switch ES2 is in the open position input & the earthing switch ES9 is in the open position input & the disconnecting switch DS2 is not in the open position, the output of MA can be self - held; after the opening command of the disconnecting switch DS2 is input, before the disconnecting switch DS2 changes from closed to open, MA can continuously output through the self - holding contact to ensure that the disconnecting switch DS2 can be reliably opened.

[0082] Line018: When the input of M9 is received, the output is Q2, that is, when the closing command of the disconnecting switch DS2 and the closing operation conditions are met, the signal allowing the opening and closing operations of the disconnecting switch DS2 is output.

[0083] Line019: When the input of MA is received, the output is Q2, that is, when the closing command of the disconnecting switch DS2 and the closing operation conditions are met, the signal allowing the opening and closing operations of the disconnecting switch DS2 is output.

[0084] Line020: When the inputs of IB and M6 are received, the output is Q2, that is, when the manual operation button of the disconnecting switch DS2 & the breaker CB1 is in the open position input & the earthing switch ES1 is in the open position input & the earthing switch ES2 is in the open position input & the earthing switch ES9 is in the open position input, the signal allowing the opening and closing operations of the disconnecting switch DS2 is output.

[0085] Among them, Line018, Line019, and Line020 are in an "OR" relationship, that is, when any one of the conditions is met, the signal allowing the opening and closing operations of the disconnecting switch DS2 can be output.

[0086] Line022: Inputs of M3, X5, and xB, output MB, i.e., inputs of the open position of disconnecting switch DS1, the open position of disconnecting switch DS2, the closing command of earthing switch ES1, and the earthing switch ES1 not in the closing position, output MB.

[0087] Line023: MB and the input of X5 form an "OR" relationship. That is, when MB is conducting, if the inputs of the open position of disconnecting switch DS1, the open position of disconnecting switch DS2, and the earthing switch ES1 not in the closing position are satisfied, the output of MB is self - held; after the closing command of earthing switch ES1 is input, before the earthing switch ES1 changes from open to closed, MB can continuously output through the self - holding contact to ensure that the earthing switch ES1 can be reliably closed.

[0088] Line024: Inputs of M3, X6, and i6, output MC, i.e., inputs of the open position of disconnecting switch DS1, the open position of disconnecting switch DS2, the opening command of earthing switch ES1, and the earthing switch ES1 not in the open position, output MC.

[0089] Line025: MC and the input of X6 form an "OR" relationship. That is, when MC is conducting, if the inputs of the open position of disconnecting switch DS1, the open position of disconnecting switch DS2, and the earthing switch ES1 not in the open position are satisfied, the output of MC is self - held; after the opening command of earthing switch ES1 is input, before the earthing switch ES1 changes from closed to open, MC can continuously output through the self - holding contact to ensure that the earthing switch ES1 can be reliably opened.

[0090] Line026: Input of MB, output Q3, i.e., when the closing command of earthing switch ES1 and the closing operation conditions are satisfied, output the signal allowing the opening and closing operations of earthing switch ES1.

[0091] Line027: Input of MC, output Q3, i.e., when the opening command of earthing switch ES1 and the opening operation conditions are satisfied, output the signal allowing the opening and closing operations of earthing switch ES1.

[0092] Line028: Input of IC and input of M3, output Q3, i.e., input of the manual operation button of earthing switch ES1, input of the open position of disconnecting switch DS1, and input of the open position of disconnecting switch DS2, output the signal allowing the opening and closing operations of earthing switch ES1.

[0093] Among them, Line026, Line027, and Line028 are in an "OR" relationship, that is, when any one of the conditions is satisfied, the signal allowing the opening and closing operations of earthing switch ES1 can be output.

[0094] Line030: Inputs of M3, X7, and xC, output MD, i.e., inputs of the open position of disconnecting switch DS1, the open position of disconnecting switch DS2, the closing command input of earthing switch ES2, and the earthing switch ES2 not in the closing position, output MD.

[0095] Line031: MD and the input of X7 form an "OR" relationship, that is, when MD is conducting, if the inputs of the open position of disconnecting switch DS1, the open position of disconnecting switch DS2, and the earthing switch ES2 not in the closing position are satisfied, the output of MD can be self - held; after the closing command input of earthing switch ES2, before the earthing switch ES2 changes from open to closed, MD can continuously output through the self - holding contact to ensure the reliable closing of the earthing switch ES2.

[0096] Line032: Inputs of M3, X8, and i7, output ME, i.e., inputs of the open position of disconnecting switch DS1, the open position of disconnecting switch DS2, the opening command input of earthing switch ES2, and the earthing switch ES2 not in the open position, output ME.

[0097] Line033: ME and the input of X8 form an "OR" relationship, that is, when ME is conducting, if the inputs of the open position of disconnecting switch DS1, the open position of disconnecting switch DS2, and the earthing switch ES2 not in the open position are satisfied, the output of ME is self - held; after the opening command input of earthing switch ES2, before the earthing switch ES2 changes from closed to open, ME can continuously output through the self - holding contact to ensure the reliable opening of the earthing switch ES2.

[0098] Line034: Input of MD, output Q4, i.e., when the closing command of earthing switch ES2 and the closing operation conditions are met, output the signal allowing the opening and closing operations of earthing switch ES2.

[0099] Line035: Input of ME, output Q4, i.e., when the opening command of earthing switch ES2 and the opening operation conditions are met, output the signal allowing the opening and closing operations of earthing switch ES2.

[0100] Line036: Inputs of I3 and M3, output Q4, i.e., input of the manual operation button of earthing switch ES2, input of the open position of disconnecting switch DS1, input of the open position of disconnecting switch DS2, output the signal allowing the opening and closing operations of earthing switch ES2.

[0101] Among them, Line034, Line035, and Line036 are in an "OR" relationship, that is, when any one of the conditions is met, the signal allowing the opening and closing operations of earthing switch ES2 can be output.

[0102] The operation locking logics of circuit breakers CB2 and CB3 are the same as that of circuit breaker CB1, and will not be elaborated here.

[0103] In particular, according to the embodiments of the present application, the control device described above with reference to the structural schematic diagram can be implemented as a control system. The control system receives the position status information of components, performs logical operations according to the preset locking logic, and controls the opening and closing operations of components based on the results of the logical operations.

[0104] In summary, the control device of the present application collects and receives the position status information of components in the switch module through the control module, performs logical operations according to the preset locking logic, can flexibly adjust the locking logic according to the actual working conditions to meet different operation requirements, and can also detect and handle abnormal situations in a timely manner. The output module outputs an operation permission signal according to the result of the logical operation, ensuring that the opening and closing operations of components are only allowed under safe conditions, improving the automation and intelligence levels of the electrical main wiring system, reducing the possibility of human misoperation, being able to respond to various changes faster, and improving the operation efficiency.

[0105] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in this application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of this application are pointed out by the following claims.

[0106] It should be understood that this application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is only limited by the appended claims.

Claims

1. A control device, characterized in that, The control device includes: Three switch modules, each of the switch modules is connected between the first bus and the second bus in series, and is used for a two-thirds wiring mode setting to perform power transmission; A control module, which is used to collect and receive the position status information of the components in the switch module, and perform logical operations according to the preset interlock logic; An output module, which is used to output an operation permission signal according to the result of the logical operation. Among them, the operation permission signal forms a control loop in the switch module to control the opening and closing operations of the components.

2. The control device according to claim 1, wherein Each of the switch modules includes a circuit breaker, two disconnectors, and two earthing switches. Among them, the first disconnector is arranged near the first bus; the second disconnector is arranged near the second bus; the circuit breaker is connected between the first disconnector and the second disconnector; the first earthing switch is connected to the first end of the circuit breaker; the second earthing switch is connected to the second end of the circuit breaker.

3. The control device according to claim 2, characterized in that, It further includes: If power generation operation is carried out, the circuit breaker, the first disconnector, and the second disconnector are in the closed position, and the first earthing switch and the second earthing switch are in the open position; If the circuit breaker is in the maintenance state, the circuit breaker, the second disconnector, and the first disconnector are sequentially adjusted from the closed position to the open position, and the first earthing switch and the second earthing switch are adjusted from the open position to the closed position.

4. The control device according to claim 2, wherein The control module includes: an acquisition sub-module and a logic processing sub-module. Among them, the acquisition sub-module includes a plurality of digital input interfaces, which are respectively used to collect the position status information of the components in the switch module and receive operation instructions from the outside; the logic processing sub-module is connected to the acquisition sub-module and performs logical operations on the position status information based on the preset interlock logic.

5. The control device according to claim 4, characterized in that, The number of the digital input interfaces is 24.

6. The control device according to claim 4, characterized in that The logic processing sub-module includes: a programmable logic controller and a field programmable gate array.

7. The control device according to claim 4, characterized in that, The preset interlock logic includes: If the circuit breaker is in the open position, and the first earthing switch and the second earthing switch are in the open position, the first disconnector and the second disconnector are allowed to perform opening operations; If both the first disconnector and the second disconnector are in the open position, the first earthing switch and the second earthing switch are allowed to perform closing operations; Before the first disconnector or the second disconnector performs opening and closing operations, the circuit breaker is in the open position, and the first earthing switch or the second earthing switch is in the open position.

8. The control device according to claim 7, characterized in that, The preset interlock logic further includes: If a closing instruction for the first disconnector or the second disconnector is received and the closing condition is met, the logic processing sub-module generates a closing permission instruction, and before the first disconnector or the second disconnector completes the closing operation, the logic processing sub-module maintains the closing permission instruction; If a opening command of the first disconnector or the second disconnector is received and the opening condition is satisfied, the logic processing sub-module generates an opening permission command, and the logic processing sub-module maintains the opening permission command before the first disconnector or the second disconnector completes the opening operation; If a closing command of the first earthing switch or the second earthing switch is received and the closing condition is satisfied, the logic processing sub-module generates a closing permission command, and the logic processing sub-module maintains the closing permission command before the first earthing switch or the second earthing switch completes the closing operation; If a opening command of the first earthing switch or the second earthing switch is received and the opening condition is satisfied, the logic processing sub-module generates an opening permission command, and the logic processing sub-module maintains the opening permission command before the first earthing switch or the second earthing switch completes the opening operation.

9. The control device according to claim 4, wherein The output module includes a plurality of digital output interfaces, which are respectively used for outputting, according to the logic operation result, an operation permission signal for forming a control loop in the switch module and controlling the opening and closing operations of components.

10. The control device according to claim 9, characterized in that, The number of the digital output interfaces is 4.

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