Automatic synchronization algorithm and system for bypass switch of power conversion device

Abstract

The invention provides an automatic synchronization algorithm and system for a bypass switch of a power conversion device. The automatic synchronization algorithm comprises the following steps: S1, acquiring position states of a main loop switch and the bypass switch in real time; s2, selecting a corresponding synchronous operation process according to the position states of the main loop switch and the bypass switch; s3, according to the selected synchronous operation process, controlling a bypass switch to execute a switching action; and S4, after the switching action is executed, judging whether the bypass switch is synchronized with the main loop switch, if so, completing the operation, and if not, triggering an alarm. The operation process of the bypass switch is simplified, misoperation possibly occurring in the manual operation process is effectively avoided, and safety risks caused by misoperation are eliminated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the industrial control technical field of power conversion device, and particularly relates to a power conversion device bypass switch automatic synchronization algorithm and system. BACKGROUND

[0002] In the power conversion device, the bypass switch plays a crucial role. Specifically, when the power conversion device must be disconnected due to routine maintenance or specific functional requirements, the bypass switch can be connected to the power supply loop in time to ensure the continuity of load power supply is not affected. It is worth noting that the installation position of the bypass switch and the main switch position of the power conversion device must be strictly corresponding, and the operation process must strictly follow the order specified in the operation ticket. This process is relatively complex, and it puts high requirements on the professional skills and rigorous attitude of the operator, because any minor misoperation may cause serious personal injury accidents.

[0003] In view of this, it is particularly urgent to design a set of automatic operation algorithm for the bypass switch of the power conversion device, which can effectively replace the traditional manual operation mode and fundamentally avoid potential safety risks. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a power conversion device bypass switch automatic synchronization algorithm, which aims to simplify the operation process of the bypass switch, effectively avoid the misoperation that may occur in the manual operation process, and eliminate the safety risks caused thereby.

[0005] In the first aspect, the embodiments of the present application provide a power conversion device bypass switch automatic synchronization algorithm, comprising:

[0006] S1, acquiring the position state of the main loop switch and the bypass switch in real time;

[0007] S2, selecting the corresponding synchronization operation process according to the position state of the main loop switch and the bypass switch;

[0008] S3, controlling the bypass switch to perform switching action according to the selected synchronization operation process;

[0009] S4, after performing the switching action, judging whether the bypass switch has been synchronized with the main loop switch, if yes, completing the operation, if not, triggering an alarm;

[0010] In step S1, the position state is realized by a switch data structure, and the data structure comprises:

[0011] a state variable for storing the current position state of the switch;

[0012] a scanning method for periodically reading the actual position of the switch;

[0013] The state acquisition method is used to return the current state variable;

[0014] A status determination method is used to determine whether the switch position is valid;

[0015] Action control method, used to control the switch to perform opening and closing actions.

[0016] Preferably, the scanning method reads the switch position at a frequency of 10 milliseconds and determines the stable state of the switch by using a position counter.

[0017] Preferably, the synchronous operation process described in step S2 is selected based on the state combination of the main circuit switch and the bypass switch. The state combination is represented by binary code, with each switch corresponding to one bit, where 0 indicates open and 1 indicates closed.

[0018] Preferably, step S2 further includes determining whether the current synchronization operation is an illegal operation; if it is an illegal operation, an alarm is triggered directly.

[0019] Preferably, the method is applicable to power conversion devices with the same number of main circuit switches and bypass switches, and no less than two.

[0020] Secondly, an automatic synchronization system for a bypass switch of a power conversion device includes:

[0021] The status acquisition module is used to acquire the position status of the main circuit switch and the bypass switch in real time.

[0022] The logic processing module is used to select the synchronization operation process based on the location status;

[0023] The execution control module is used to control the bypass switch to perform switching actions;

[0024] The status verification module is used to verify whether synchronization was successful after execution.

[0025] The alarm module is used to trigger alarms in abnormal situations.

[0026] The embodiments of the present invention bring the following beneficial effects:

[0027] This invention ensures the safe and accurate synchronous operation of the bypass switch through a series of judgment and operation steps, and promptly alarms in case of abnormalities, guaranteeing the stable operation of the system. Furthermore, it incorporates a power conversion device in the software design that can automatically complete the synchronous operation.

[0028] Other features and advantages of the invention will be set forth in the following description, and some features will be obvious from the description or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0030] Figure 1 A schematic diagram of the switch data structure provided in an embodiment of the present invention;

[0031] Figure 2 A flowchart of the scanning method provided in an embodiment of the present invention;

[0032] Figures 3-5 This is an example diagram of the synchronization logic of a dual-switch system provided in an embodiment of the present invention;

[0033] Figure 6 This is an example diagram of the synchronization logic of a three-switch system provided in an embodiment of the present invention;

[0034] Figure 7 This is a flowchart illustrating the synchronous operation of a bypass switch provided in an embodiment of the present invention. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: An automatic synchronization algorithm for a bypass switch of a power conversion device, comprising the following steps:

[0037] S1. Real-time acquisition of the position status of the main circuit switch and bypass switch; the position status is implemented through a switch data structure, which is used for real-time monitoring and control of the switch position status, including a state variable (m_state) and multiple operation methods (scan, getState, judge, motion), specifically,

[0038] State variables are used to store the current position state of the switch;

[0039] The scanning method is used to periodically read the actual position of the switch; that is, the switch position feedback signal is scanned with a period of 10ms, and debouncing is achieved by accumulating a counter (+1 when closed, -1 when open). When the counter reaches 8, it confirms that the switch is closed (m_state=1), and when it returns to zero, it confirms that the switch is open (m_state=0).

[0040] The state acquisition method is used to return the current state variable;

[0041] A status determination method is used to determine whether the switch position is valid;

[0042] Action control method is used to send commands to control relays to control switches to perform opening and closing actions.

[0043] The scanning method reads the switch position every 10 milliseconds and determines the stable state of the switch using a position counter. Specifically, it scans the switch's position feedback signal at a fixed period and uses a counter mechanism to debounce the state. When the position counter reaches a preset threshold, the value of the state variable (m_state) is updated to confirm the stable state of the switch.

[0044] S2. Construct the automatic synchronization logic of the bypass switch. Based on the current state combination of the main circuit switch, select the corresponding synchronization operation process, that is, dynamically select and generate the operation sequence that matches the current state combination of the bypass switch so that the state of the bypass switch is synchronized with the state of the main circuit switch.

[0045] Furthermore, the automatic synchronization logic is implemented in the form of a state transition table or decision tree. The state combination of the main circuit switch and the bypass switch is represented by binary code. For any given state combination of the main circuit switch, a set of step-by-step operation instructions can be generated to transition the bypass switch from its current state combination to the same state combination as the main circuit switch. Specifically, the synchronization operation process is selected based on the state combination of the main circuit switch and the bypass switch. The state combination is represented by binary code, with each switch corresponding to one bit: 0 indicates open and 1 indicates closed.

[0046] S3. Control the bypass switch to perform the switching action according to the selected synchronous operation procedure;

[0047] S4. After performing the switching action, determine whether the bypass switch has been synchronized with the main circuit switch. If synchronized, the operation is completed; if not synchronized, an alarm is triggered.

[0048] Specifically, the logic execution module is configured to: receive a synchronization operation command, check all switch positions, determine the legality of the operation, and if legal, execute the operation sequence selected in step S2. After execution, it verifies whether the switch positions meet expectations; if illegal or do not meet expectations, it triggers an alarm. Determining the legality of the operation includes checking for illegal position combinations, such as two incoming switches being simultaneously closed.

[0049] In this embodiment of the invention, when the main circuit consists of two switches, the state combination includes 00, 01, and 10; when the main circuit consists of three switches, the state combination includes 000, 001, 010, 011, 100, 101, 110, and 111; the method can be extended to power conversion devices consisting of more switches.

[0050] The method described in this embodiment of the invention is applicable to power conversion devices with the same number of main circuit switches and bypass switches, and no less than two.

[0051] Example 2, see Figures 3-6 When dealing with dual-switch and triple-switch systems, the automatic synchronization logic of the bypass switch is as follows:

[0052] The main circuit switch and the bypass switch are in different positions, which necessitates the use of different action procedures to achieve synchronous operation. To achieve this goal efficiently and accurately, a functional module needs to be designed. The core function of this module is to select the appropriate action procedure based on the different position states of the switches and strictly follow the predetermined procedure to complete the synchronous operation of the bypass switch.

[0053] If 0 represents the switch being open and 1 represents the switch being closed, and the main circuit consists of two switches, then 00, 10, and 01 can represent three position combinations. The number of bypass switches corresponds to the number of switches in the main circuit, and also has three position combinations: 00, 10, and 01.

[0054] "0" represents the switch being in the open state, and "1" represents the switch being in the closed state. When the main circuit consists of two switches, different combinations of switch states can be represented by three specific code forms: "00", "10", and "01", indicating three different position combinations of the main circuit switches. Since the number of bypass switches corresponds one-to-one with the number of main circuit switches, their position combinations also have the three representation forms: "00", "10", and "01".

[0055] like Figure 3The current main circuit switch is in state 00. The bypass switch is in position 00. Since the main circuit switch and bypass switch are in the same position, the bypass switch remains in its current state and requires no operation. If the bypass switch is in position 01, then disconnecting bypass switch #2 will synchronize the main circuit switch and bypass switch. If the bypass switch is in position 10, then disconnecting bypass switch #1 will synchronize the main circuit switch and bypass switch.

[0056] like Figure 4 The current main circuit switch is in state 01. The bypass switch is in state 00. Therefore, closing bypass switch #2 will synchronize the main circuit switch and bypass switch. If the bypass switch is in state 01, since the main circuit switch and bypass switch are in the same position, the bypass switch remains in its current state without any operation. If the bypass switch is in state 10, first disconnect bypass switch #1 to change its position to 00, then close bypass switch #2. This will synchronize the main circuit switch and bypass switch.

[0057] like Figure 5 The current main circuit switch is in position 10 (state zero). The bypass switch is in position 00. Closing bypass switch #1 will synchronize the main circuit switch and bypass switch. If the bypass switch is in position 01, first disconnect bypass switch #2 to change its position to 00, then close bypass switch #1. This will synchronize the main circuit switch and bypass switch. If the bypass switch is in position 10, since the main circuit switch and bypass switch are in the same position, the bypass switch remains in its current state without any further action.

[0058] Regardless of the positions of the bypass switch and the main switch, the above three steps can synchronize the bypass switch of the power conversion device consisting of two switches in the main circuit.

[0059] When the main circuit consists of three switches, different combinations of switch states can be represented by eight specific codes: "000", "001", "010", "011", "100", "101", "110", and "111". Since the bypass switches correspond one-to-one with the main circuit switches, their position combinations also have the same eight representations: "000", "001", "010", "011", "100", "101", "110", and "111".

[0060] like Figure 6The example shown uses the main circuit switch in state 6, position 110. If the bypass switch is in position 000, first close bypass switch #1 to change its position to 100, then close bypass switch #2. Afterwards, the main circuit switch and bypass switch are in the same position, achieving synchronization. If the bypass switch is in position 001, first disconnect bypass switch #3 to change its position to 000, then close bypass switch #1 to change its position to 100, and finally close bypass switch #2. Afterwards, the main circuit switch and bypass switch are in the same position, achieving synchronization. If the bypass switch is in position 010, closing bypass switch #1 will change the main circuit switch and bypass switch are in the same position, achieving synchronization. If the bypass switch is in position 011, first disconnect bypass switch #3 to change its position to 010, then close bypass switch #1. Afterwards, the main circuit switch and bypass switch are in the same position, achieving synchronization. If the bypass switch is in position 100, closing bypass switch #2 will change the main circuit switch and bypass switch are in the same position, achieving synchronization. If the bypass switch is in position 101, first disconnect bypass switch #3 to change its position to 100, then close bypass switch #2. Afterward, the main circuit switch and bypass switch will be in the same position, achieving synchronization. If the bypass switch is in position 110, since the main circuit switch and bypass switch are in the same position, the bypass switch remains in its current state and requires no operation. If the bypass switch is in position 111, disconnecting bypass switch #3 will change the main circuit switch and bypass switch positions, achieving synchronization.

[0061] The synchronous operation procedures for other states when the main circuit consists of three switches will not be elaborated further. The synchronous operation procedures designed based on the above ideas can be extended to power conversion devices consisting of more switches.

[0062] Example 3: A method for performing synchronous operation based on the bypass switch in Example 1, such as... Figure 7 As shown, the specific steps are as follows:

[0063] Received synchronization operation instruction: The process begins with receiving the synchronization operation instruction. This is the trigger point for the entire operation, indicating that the system needs to perform a synchronization operation of the bypass switch.

[0064] Check all switch positions: Upon receiving the command, the system first checks the position status of all relevant switches. This step is to obtain the actual state of the current switches, providing basic data for subsequent operations.

[0065] Determining if an operation is illegal: Based on the detected switch position status, the system will determine whether the currently requested synchronization operation is legal. If the operation is illegal, the process will directly proceed to the "alarm" step, alerting the operator that an abnormal situation has occurred.

[0066] Selecting the correct operating procedure: If the operation is legal, the system will select the appropriate correct operating procedure based on the current position of the switch. This step ensures the accuracy and safety of the operation, adopting different operating strategies according to different situations.

[0067] Bypass switch switching: After selecting the correct operation procedure, the system will perform the bypass switch switching operation. This is the actual step of changing the switch state, adjusting the switch to the expected position.

[0068] Determining if the position meets expectations: After completing the switch switching operation, the system will recheck the switch's position status to determine if the expected position has been reached. If the position meets expectations, the process returns to the "Received Synchronization Operation Instruction" step, waiting for the next instruction; if the position does not meet expectations, the process enters the "Alarm" step, alerting the operator that there is an operational anomaly.

[0069] Alarm: If the system determines that an illegal operation or the location is not as expected, it will trigger an alarm mechanism to notify the operator of the abnormal situation so that it can be dealt with in a timely manner.

[0070] The entire process involves a series of judgments and operational steps to ensure that the synchronous operation of the bypass switch can be carried out safely and accurately, and to provide timely alarms in case of abnormalities, thus ensuring the stable operation of the system.

[0071] Example 4: An automatic synchronization system for a bypass switch of a power conversion device, comprising:

[0072] The status acquisition module is used to acquire the position status of the main circuit switch and the bypass switch in real time.

[0073] The logic processing module is used to select the synchronization operation process based on the location status;

[0074] The execution control module is used to control the bypass switch to perform switching actions;

[0075] The status verification module is used to verify whether synchronization was successful after execution.

[0076] The alarm module is used to trigger alarms in abnormal situations.

[0077] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0078] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic synchronization algorithm for a bypass switch of a power conversion device, characterized in that, include: S1. Real-time acquisition of the position status of the main circuit switch and bypass switch; S2. Select the corresponding synchronous operation procedure according to the position status of the main circuit switch and the bypass switch; S3. Control the bypass switch to perform the switching action according to the selected synchronous operation procedure; S4. After performing the switching action, determine whether the bypass switch has been synchronized with the main circuit switch. If synchronized, the operation is completed; if not synchronized, an alarm is triggered. The position state described in step S1 is implemented through a switch data structure, which includes: State variables are used to store the current position state of the switch; A scanning method is used to periodically read the actual position of the switch; The state acquisition method is used to return the current state variable; A status determination method is used to determine whether the switch position is valid; Action control method, used to control the switch to perform opening and closing actions.

2. The automatic synchronization algorithm for the bypass switch of the power conversion device according to claim 1, characterized in that, The scanning method reads the switch position every 10 milliseconds and uses a position counter to determine the stable state of the switch.

3. The automatic synchronization algorithm for the bypass switch of the power conversion device according to claim 1, characterized in that, The synchronous operation process described in step S2 is selected based on the state combination of the main circuit switch and the bypass switch. The state combination is represented by binary code, with each switch corresponding to one bit, where 0 indicates open and 1 indicates closed.

4. The automatic synchronization algorithm for the bypass switch of the power conversion device according to claim 1, characterized in that, Step S2 also includes determining whether the current synchronization operation is an illegal operation; if it is an illegal operation, an alarm is triggered directly.

5. The automatic synchronization algorithm for the bypass switch of the power conversion device according to claim 1, characterized in that, The method is applicable to power conversion devices with the same number of main circuit switches and bypass switches, and no fewer than two.

6. An automatic synchronization system for a bypass switch of a power conversion device, characterized in that, include: The status acquisition module is used to acquire the position status of the main circuit switch and the bypass switch in real time. The logic processing module is used to select the synchronization operation process based on the location status; The execution control module is used to control the bypass switch to perform switching actions; The status verification module is used to verify whether synchronization was successful after execution. The alarm module is used to trigger alarms in abnormal situations.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the method as described in any one of claims 1-5.

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