Wireless remote control system and method of alternating current contactor

Abstract

The invention discloses a wireless remote control system and method for an AC contactor, and relates to the field of AC contactor control, and the method comprises the steps: an electrical parameter collection module collects all parameters of a power grid in real time, and transmits the parameter information to a control master station through a communication module; the control master station receives the parameter information, analyzes and calculates the parameter information, judges whether to start and stop the AC contactor, and sends a start-stop instruction to the communication module if start-stop is needed; the communication module sends a start-stop instruction to the start-stop control module, the start-stop control module controls the AC contactor to start and stop, and the self-inspection module collects the current state of the system and sends state information to the control master station through the communication module. According to the invention, a wireless remote control means is adopted, so that a product does not need wiring, distance limitation does not need to be considered, a self-checking module is additionally arranged, a power distribution network can be automatically and forcibly disconnected in an emergency, and a remarkable effect on protection of a system and paired equipment is achieved.

Description

Technical Field

[0001] The invention relates to the field of AC contactor control, in particular to a wireless remote control system and method for an AC contactor. Background Art

[0002] AC contactors play a vital role in power grids. For example, AC contactors can realize the on-off control of circuits and are widely used in starting and stopping motors, switching power lines, etc. to ensure the stable operation of power systems. When circuits are overloaded, short-circuited, etc., AC contactors can quickly cut off the power supply to protect electrical equipment and lines from damage. In automated control systems, AC contactors are used as actuators to realize automatic control of electrical equipment.

[0003] At present, most AC contactors use hard wiring to achieve close-range control, which has the following disadvantages:

[0004] Spatial distance limitation: The hard wiring method limits the installation location of the AC contactor, which limits the distance between the control device and the controlled device, which is not conducive to the layout and maintenance of large equipment.

[0005] Complex wiring: Hard wiring requires a large number of cables and terminals, which makes wiring complex and increases the difficulty of installation and maintenance.

[0006] Poor flexibility: Hard wiring is not conducive to the relocation and adjustment of equipment. Once the location of the equipment changes, rewiring is required, which increases the workload.

[0007] Aiming at the shortcomings of the existing AC contactor control method, the present invention proposes a wireless remote control system and method for AC contactor. The system realizes remote control of AC contactor through wireless communication technology, which solves the problems of space distance limitation, complex wiring, low reliability, poor flexibility and safety hazards of existing hard-wired connection. Summary of the invention

[0008] In view of the above-mentioned problems, the present invention is proposed.

[0009] Therefore, the problem to be solved by the present invention is that most of the existing AC contactors use hard wiring to achieve close-range control, which has problems such as spatial distance limitation, complex wiring, low reliability, poor flexibility and potential safety hazards.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions: a wireless remote control system for an AC contactor, comprising an electrical parameter acquisition module, a communication module, a start-stop control module and a self-test module.

[0011] As a preferred solution of the wireless remote control system of an AC contactor described in the present invention, wherein: the electrical parameter acquisition module is used to collect power parameter data in the power grid; the communication module is used to send information of the wireless remote control system to the control master station, and receive command information sent by the control master station; the start-stop control module is used to control the start and stop of the AC contactor; and the self-test module is used to detect the status information of the wireless remote control system.

[0012] To solve the above technical problems, the present invention provides the following technical solutions: a method for a wireless remote control system of an AC contactor, comprising: an electrical parameter acquisition module acquires various parameters of the power grid in real time, and sends the parameter information to a control main station through a communication module; the control main station receives the parameter information for analysis and calculation, determines whether to start and stop the AC contactor, and sends a start and stop instruction to the communication module if start and stop are required; the communication module sends the start and stop instruction to the start and stop control module, the start and stop control module controls the AC contactor to start and stop, the self-test module acquires the current state of the system, and sends the state information to the control main station through the communication module.

[0013] As a preferred solution of the method of wireless remote control system of an AC contactor described in the present invention, wherein: the electrical parameter acquisition module real-time acquisition of various parameters of the power grid includes: the electrical parameter acquisition module acquires power data collected by high-precision voltage sensors and current sensors deployed at key nodes of the power grid; the analog signal collected by the sensor is converted into a digital signal by an analog-to-digital converter in the electrical parameter acquisition module, and preprocessed; a copy of the preprocessed data is made, the original data is transmitted to the communication module and sent to the control main station, and the backup data is stored in the memory inside the electrical parameter acquisition module.

[0014] As a preferred solution of the method of wireless remote control system of an AC contactor described in the present invention, wherein: the communication module sends a session key to pair with the control main station, and after successful pairing, establishes a transmission channel with the control main station, and the communication module packages and encrypts the pre-processed data and sends it to the control main station; for the information sent by the control main station, the communication module receives it and the decryption module inside the communication module decrypts it, parses the instructions and sends them to the corresponding module.

[0015] As a preferred solution of a method for a wireless remote control system of an AC contactor described in the present invention, the judgment of whether to start and stop the AC contactor includes: after the control main station receives the parameter information, obtaining the status information of the wireless remote control system at the previous moment; if the status information at the previous moment is a connected state, analyzing and calculating the parameter information, judging whether the current current and voltage will be higher than the load threshold of the distribution equipment, if higher than the load threshold, sending a disconnection instruction to the communication module, if lower than the load threshold, no instruction is required to be sent; if the status information at the previous moment is a disconnection state, analyzing and calculating the parameter information, judging whether the current current and voltage will be lower than the load threshold of the distribution equipment, if lower than the load threshold, sending a connection instruction to the communication module, if higher than the load threshold, no instruction is required to be sent.

[0016] As a preferred solution of a method for a wireless remote control system of an AC contactor described in the present invention, wherein: the start-stop control module controls the AC contactor to perform start-stop actions, including: the relay in the start-stop control module serves as a control interface, receives the command signal from the communication module, the control interface is directly connected to the coil of the AC contactor, and controls the attraction and release of the AC contactor by switching on and off the current to control the connection and disconnection of the distribution equipment in the distribution network; after the operation is executed, the operation result is fed back to the self-test module through the state feedback circuit.

[0017] As a preferred solution of a method for a wireless remote control system of an AC contactor described in the present invention, wherein: the self-check module collects the current state of the system and sends the state information to the control main station through the communication module, including: the self-check module monitors the power supply and operating temperature of the electrical parameter acquisition module, the communication module and the start-stop control module; if the power supply is lower than the minimum power consumption threshold, the charging reminder information is sent to the control main station through the communication module; if the operating temperature is greater than the temperature threshold, the temperature information is sent to the control main station through the communication module, and a high temperature warning is issued; when the high temperature duration meets the preset time, the self-check module starts the forced stop setting, and the wireless The remote control system and the power distribution equipment are disconnected from the power distribution network; the operation result is fed back to the self-checking module through the state feedback circuit, including monitoring the pull-in and release states of the AC contactor through the position sensor, feeding back the state information to the self-checking module through the feedback circuit, the self-checking module (400) uses the communication module to send the state information to the control main station, the control main station compares whether the state information and the sent instruction information are consistent, if they are consistent, the system runs normally, if not, the instruction is sent to the communication module again, and new state information is received, if the new state information and the sent instruction information are still inconsistent, then a forced stop instruction is sent to enable the self-checking module to start the forced stop setting.

[0018] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the wireless remote control system and method of an AC contactor as described above are implemented.

[0019] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the wireless remote control system and method for an AC contactor as described above.

[0020] The beneficial effects of the present invention are as follows: most existing AC contactors use hard wiring to achieve close-range control, which has problems such as space distance limitation, complex wiring, low reliability, poor flexibility and potential safety hazards. The present invention uses wireless remote control means to make the product free of wiring and distance limitation, and adds a self-check module, which can automatically forcibly disconnect the power distribution network in case of emergencies, and has a significant effect on the protection of the system and paired devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0022] Figure 1 This is a module structure diagram of a wireless remote control system for an AC contactor in Example 1.

[0023] Figure 2 This is a flow chart of a method for a wireless remote control system of an AC contactor in Example 2. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a wireless remote control system for an AC contactor including an electrical parameter acquisition module 100, a communication module 200, a start-stop control module 300 and a self-test module 400.

[0027] The electrical parameter acquisition module 100 is used to collect power parameter data in the power grid; the communication module 200 is used to send information of the wireless remote control system to the control main station and receive command information from the control main station; the start-stop control module 300 is used to control the start and stop of the AC contactor; the self-test module 400 is used to detect the status information of the wireless remote control system.

[0028] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0029] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0030] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0031] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0032] Example 2, reference Figure 2 , which is the second embodiment of the present invention, and which is different from the first embodiment in that: a method for wireless remote control system of an AC contactor includes: Figure 2 As shown:

[0033] S1. The electric parameter acquisition module 100 acquires various parameters of the power grid in real time and sends the parameter information to the control main station through the communication module 200.

[0034] The electric parameter acquisition module 100 acquires electric power data collected by high-precision voltage sensors and current sensors deployed at key nodes of the power grid.

[0035] The analog signal collected by the sensor is converted into a digital signal by the analog-to-digital converter in the electrical parameter collection module 100 and pre-processed.

[0036] A copy of the pre-processed data is made, the original data is transmitted to the communication module 200 and sent to the control main station, and the backup data is stored in the memory inside the electrical parameter acquisition module 100 .

[0037] The data in the memory can be retrieved according to the instructions of the control master station and automatically cleared at regular intervals to reduce memory pressure.

[0038] The communication module 200 sends the session key to pair with the control master station. After the pairing is successful, a transmission channel is established with the control master station. The communication module 200 packages and encrypts the pre-processed data and sends it to the control master station.

[0039] The information sent from the control master station is received by the communication module 200 and then decrypted by the decryption module inside the communication module 200, and the instructions are parsed and sent to the corresponding execution module.

[0040] S2. The control master station receives the parameter information for analysis and calculation to determine whether to start or stop the AC contactor. If start or stop is required, a start or stop instruction is sent to the communication module 200.

[0041] After receiving the parameter information, the control master station obtains the status information of the wireless remote control system at the last moment.

[0042] If the status information at the previous moment is a connected state, the parameter information is analyzed and calculated to determine whether the current current and voltage are higher than the load threshold of the distribution equipment. If it is higher than the load threshold, a disconnect command is sent to the communication module 200. If it is lower than the load threshold, no command needs to be sent.

[0043] If the status information at the previous moment is a disconnected state, the parameter information is analyzed and calculated to determine whether the current current and voltage are lower than the load threshold of the distribution equipment. If it is lower than the load threshold, a connection instruction is sent to the communication module 200. If it is higher than the load threshold, no instruction needs to be sent.

[0044] S3, the communication module 200 sends the start-stop command to the start-stop control module 300, the start-stop control module 300 controls the AC contactor to perform start-stop actions, the self-test module 400 collects the current state of the system, and sends the state information to the control master station through the communication module 200.

[0045] The relay in the start-stop control module 300 serves as a control interface, receiving the command signal from the communication module 200. The control interface is directly connected to the coil of the AC contactor, and controls the attraction and release of the AC contactor by switching on and off the current to control the connection and disconnection of the distribution equipment in the distribution network.

[0046] After the operation is performed, the operation result is fed back to the self-check module 400 through the state feedback circuit.

[0047] The self-check module 400 monitors the power supply and operating temperature of the electrical parameter acquisition module, the communication module and the start-stop control module. If the power supply is lower than the minimum power consumption threshold, the charging reminder information is sent to the control main station through the communication module 200. If the operating temperature is greater than the temperature threshold, the temperature information is sent to the control main station through the communication module 200, and a high temperature warning is issued. When the high temperature duration meets the preset time, the self-check module 400 starts the forced stop setting to disconnect the wireless remote control system and the power distribution equipment from the distribution network.

[0048] Feedback of the operation result to the self-test module 400 through the state feedback circuit specifically includes: monitoring the attraction and release state of the AC contactor through the position sensor, feeding back the state information to the self-test module 400 through the feedback circuit, the self-test module 400 uses the communication module 200 to send the state information to the control main station, and the control main station compares the state information and the sent instruction information to see if they are consistent. If they are consistent, the system runs normally. If they are inconsistent, the instruction is sent to the communication module 200 again, and new state information is received. If the new state information is still inconsistent with the sent instruction information, a forced stop instruction is sent to enable the self-test module 400 to start the forced stop setting.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wireless remote control system for an AC contactor, characterized in that: It comprises an electrical parameter acquisition module (100), a communication module (200), a start / stop control module (300) and a self-test module (400).

2. A wireless remote control system for an AC contactor as claimed in claim 1, characterized in that: The electric parameter acquisition module (100) is used to acquire electric power parameter data in the power grid; The communication module (200) is used to send information of the wireless remote control system to the control main station, and receive instruction information sent by the control main station; The start-stop control module (300) is used to control the start and stop of the AC contactor; The self-check module (400) is used to detect status information of the wireless remote control system.

3. A method for wireless remote control system of an AC contactor as described in claims 1 to 2, characterized in that: The electric parameter acquisition module (100) acquires various parameters of the power grid in real time, and sends the parameter information to the control main station through the communication module (200); The control master station receives the parameter information for analysis and calculation, determines whether to start or stop the AC contactor, and sends a start or stop command to the communication module (200) if start or stop is required; The communication module (200) sends the start / stop command to the start / stop control module (300), the start / stop control module (300) controls the AC contactor to perform start / stop actions, and the self-check module (400) collects the current state of the system and sends the state information to the control main station through the communication module (200).

4. A method for wireless remote control system of an AC contactor as claimed in claim 3, characterized in that: The electric parameter acquisition module (100) acquires various parameters of the power grid in real time, including: the electric parameter acquisition module (100) acquires power data collected by high-precision voltage sensors and current sensors deployed at key nodes of the power grid; The analog signal collected by the sensor is converted into a digital signal by an analog-to-digital converter in the electrical parameter collection module (100), and preprocessed; A copy of the pre-processed data is made, the original data is transmitted to the communication module (200) and sent to the control main station, and the backup data is stored in a memory inside the electrical parameter acquisition module (100).

5. The method for wireless remote control system of an AC contactor as claimed in claim 4, characterized in that: The communication module (200) sends a session key to pair with the control main station, and after successful pairing, establishes a transmission channel with the control main station. The communication module (200) packages and encrypts the pre-processed data and sends it to the control main station; After the communication module (200) receives the information sent from the control master station, the information is decrypted by a decryption module inside the communication module (200), and instructions are parsed and sent to the corresponding module.

6. A method for wireless remote control system of an AC contactor as claimed in claim 5, characterized in that: The determination of whether to start or stop the AC contactor includes, after the control master station receives the parameter information, obtaining the state information of the wireless remote control system at the last moment; If the status information at the previous moment is a connected state, then analyzing and calculating parameter information to determine whether the current current and voltage are higher than the load threshold of the power distribution equipment; if they are higher than the load threshold, then sending a disconnection instruction to the communication module (200); if they are lower than the load threshold, then no instruction is required; If the status information at the previous moment is a disconnected state, the parameter information is analyzed and calculated to determine whether the current current and voltage are lower than the load threshold of the power distribution equipment. If they are lower than the load threshold, a connection instruction is sent to the communication module (200). If they are higher than the load threshold, no instruction needs to be sent.

7. A method for wireless remote control system of an AC contactor as claimed in claim 6, characterized in that: The start-stop control module (300) controls the AC contactor to perform start-stop actions, including: a relay in the start-stop control module (300) serving as a control interface to receive a command signal from the communication module (200); the control interface is directly connected to the coil of the AC contactor, and the AC contactor is controlled to be closed and released by switching current on and off, so as to control the connection and disconnection of the power distribution equipment in the power distribution network; After the operation is performed, the operation result is fed back to the self-checking module (400) through the state feedback circuit.

8. A method for wireless remote control system of an AC contactor as claimed in claim 7, characterized in that: The self-check module (400) collects the current state of the system and sends the state information to the control main station through the communication module (200), including: the self-check module (400) monitors the power supply and operating temperature of the electrical parameter collection module, the communication module and the start-stop control module; if the power supply is lower than the minimum power consumption threshold, the communication module (200) sends charging reminder information to the control main station; if the operating temperature is greater than the temperature threshold, the communication module (200) sends temperature information to the control main station and issues a high temperature warning; when the high temperature duration meets a preset time, the self-check module (400) starts a forced stop setting to disconnect the wireless remote control system and the power distribution equipment from the power distribution network; Feeding back the operation result to the self-checking module (400) through the state feedback circuit includes: monitoring the pull-in and release states of the AC contactor through a position sensor, feeding back the state information to the self-checking module (400) through the feedback circuit, the self-checking module (400) sending the state information to the control main station using the communication module (200), the control main station comparing the state information and the sent instruction information to see if they are consistent, if they are consistent, the system operates normally, if they are inconsistent, sending the instruction to the communication module (200) again, and receiving new state information, if the new state information and the sent instruction information are still inconsistent, sending a forced stop instruction to enable the self-checking module (400) to start the forced stop setting.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for a wireless remote control system of an AC contactor according to any one of claims 3 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a method for a wireless remote control system of an AC contactor according to any one of claims 3 to 8 are implemented.

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