Remote auxiliary transmission method and system

Abstract

The invention discloses a remote auxiliary transmission method and system. The method comprises the steps that a main control board reads a GPIO state and generates a control signal; the main control board transmits a control signal to the slave board through the wireless sending module; and the slave board wireless receiving module receives the control signal, sets a GPIO state according to the decoding content, and triggers the relay to control the action. The beneficial effects of the invention are that the main control board generates a corresponding control signal according to the state of the button, so that an operator can remotely control the switching-on and switching-off actions of the circuit breaker in a main control room, the working efficiency is remarkably improved, and the labor intensity of the operator is reduced; and the system for remotely controlling the opening and closing of the circuit breaker through the wireless communication technology not only solves the problem of limited control distance, but also improves the efficiency and safety of substation protection regular checking work.

Description

Technical Field

[0001] The invention relates to the field of remote control of electric power systems, and in particular to a remote auxiliary transmission method and system thereof. Background Art

[0002] In the regular inspection of the protection of the substation, the relay protection maintenance personnel face a series of challenges. First, when conducting multiple transmission tests on the circuit breaker, the operator needs to frequently travel between the main control room and the switch site, which not only reduces the work efficiency, but also increases the labor intensity of the operators. Secondly, since it is impossible to visually observe the opening and closing of the circuit breaker, the correctness of the experimental results is difficult to guarantee. Especially in the regular inspection of the main transformer protection system of the digital station, when conducting the anti-trip test of the circuit breaker, personnel are required to short-circuit the circuit at the installation of the circuit breaker on each side of the main transformer, which further aggravates the problem of low work efficiency in the case of a shortage of personnel. In the prior art, the control of the circuit breaker depends on manual on-site operation, which is not only inconvenient to operate and has a long response time, but also has a limited control distance, making it difficult to achieve long-distance control. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a remote auxiliary transmission method and system thereof, which can remotely control the circuit breaker opening and closing system through wireless communication technology, which not only solves the problem of limited control distance, but also improves the efficiency and safety of substation protection and regular inspection work.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In the first aspect, an embodiment of the present invention provides a remote auxiliary transmission method, which includes: a main control board reads the GPIO status and generates a control signal; the main control board transmits the control signal to the slave board through a wireless sending module; the slave board wireless receiving module receives the control signal and sets the GPIO status according to the decoded content, triggering the relay control action.

[0008] As a preferred solution of the remote auxiliary transmission method of the present invention, the GPIO state is whether the closing and opening buttons are pressed; the step of the main control board reading the GPIO state and generating a control signal is that the main control board generates a closing or opening control signal by reading the state of the closing and opening buttons.

[0009] As a preferred solution of the remote auxiliary transmission method of the present invention, the wireless transmitting module and the wireless receiving module both adopt 433MHz wireless modules.

[0010] As a preferred solution of the remote auxiliary transmission method of the present invention, the process in which the main control board transmits the control signal to the slave board through the wireless sending module is that the wireless sending module on the main board encodes and modulates the closing and opening control signal, and the wireless sending module transmits it to the slave board in the form of low-frequency broadcasting.

[0011] As a preferred solution of the remote auxiliary transmission method of the present invention, the process of receiving the control signal from the board wireless receiving module and setting the GPIO state according to the decoded content is as follows: after the wireless module of the board receives the radio frequency signal, the signal is converted into original data through the demodulation circuit, and decoded through the decoding circuit, and finally the decoded control information is output to the frame buffer, and the GPIO state is set according to the content of the frame buffer.

[0012] As a preferred solution of the remote auxiliary transmission method of the present invention, the control action of the slave board triggering the relay includes two actions: when the GPIO state read by the main board is closed, the slave board triggers the relay closing action; when the GPIO state read by the main board is open, the slave board triggers the relay opening action.

[0013] In a second aspect, an embodiment of the present invention provides a remote auxiliary transmission system, which includes a main control board and n groups of slave boards, where n≥1, and the main control board sends signals to corresponding slave boards over a long distance via wireless transmission.

[0014] As a preferred solution of the remote auxiliary transmission system of the present invention, the main control board includes a first single chip microcomputer, a wireless transmission module, n groups of gate buttons and n combination gate buttons.

[0015] As a preferred solution of the remote auxiliary transmission system of the present invention, the slave board includes a second single-chip microcomputer, a wireless receiving module, and a relay control module.

[0016] As a preferred solution of the remote auxiliary transmission system of the present invention, the relay control module further includes a closing DC relay and an opening DC relay.

[0017] Beneficial effects of the present invention: The present invention generates corresponding control signals according to the button status through the main control board, so that the operator can remotely control the closing and opening actions of the circuit breaker in the main control room, which significantly improves the work efficiency and reduces the labor intensity of the operators; and the system for remotely controlling the opening and closing of the circuit breaker through wireless communication technology not only solves the problem of limited control distance, but also improves the efficiency and safety of the substation protection and regular inspection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 labor. Among them:

[0019] Figure 1 Schematic diagram of the overall process of the remote auxiliary transmission method.

[0020] Figure 2 This is a schematic diagram of the data transmission and processing logic of the main control board of the remote auxiliary transmission system.

[0021] Figure 3 This is a schematic diagram of slave board data transmission and processing logic for the remote auxiliary transmission system.

[0022] Figure 4 This is the system structure block diagram of the remote auxiliary transmission system. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Example 1

[0027] Reference Figures 1 to 3 , which is the first embodiment of the present invention, provides a remote auxiliary transmission method, which includes:

[0028] S1: The main control board reads the GPIO status and generates a control signal;

[0029] Furthermore, the GPIO state is whether the closing or opening button is pressed; the step of the main control board reading the GPIO state and generating a control signal is that the main control board generates a closing or opening control signal by reading the state of the closing or opening button.

[0030] It should be noted that the main control board in the present invention adopts an STM microcontroller with processing and control capabilities. Compared with the traditional direct line connection control method, the method of reading the GPIO state is more flexible and can easily integrate a variety of control inputs, such as buttons, sensors, etc. At the same time, the processing of digital signals is also more stable and reliable, and has strong anti-interference ability.

[0031] It should also be noted that GPIO (General Purpose Input / Output) is a general input / output port. By setting the corresponding parameter status value in the STM microcontroller, the physical state of whether the closing and opening buttons are pressed is converted into a digital signal and filled into the buffer to prepare for subsequent wireless transmission.

[0032] S2: The main control board transmits the control signal to the slave board through the wireless transmission module;

[0033] Furthermore, both the wireless transmitting module and the wireless receiving module use 433MHz wireless modules.

[0034] Furthermore, the process of the main control board transmitting the control signal to the slave board through the wireless transmission module is that the wireless transmission module on the main board encodes and modulates the closing and opening control signal, and the wireless transmission module transmits it to the slave board in the form of low-frequency broadcasting.

[0035] It should be noted that the low cost and good penetration of the 433MHz frequency band make it very suitable for wireless communication in complex electromagnetic environments such as substations. The adoption of low-frequency broadcasting further enhances the stability and reliability of the signal, ensuring the effective transmission of the control signal even in the presence of obstacles, ensuring the stability of remote control, and avoiding misoperation caused by loss of control signals.

[0036] Preferably, wireless transmission of control signals is used to solve many drawbacks of traditional manual on-site operation. Maintenance personnel do not need to frequently travel between the main control room and the switch site, which greatly improves work efficiency and reduces labor intensity. At the same time, wireless control breaks the distance limit and realizes remote control of circuit breakers, which is especially suitable for large substations or places that are difficult for personnel to reach.

[0037] S3: Receive the control signal from the wireless receiving module of the board and set the GPIO state according to the decoded content to trigger the relay control action.

[0038] Furthermore, the process of receiving the control signal from the board's wireless receiving module and setting the GPIO state according to the decoded content is as follows: after the wireless module of the board receives the RF signal, the signal is converted into original data through the demodulation circuit, and decoded through the decoding circuit, and finally the decoded control information is output to the frame buffer, and the GPIO state is set according to the content of the frame buffer.

[0039] Furthermore, the control action of the slave board triggering the relay includes two actions: when the GPIO state read by the main board is closed, the slave board triggers the relay to close; when the GPIO state read by the main board is open, the slave board triggers the relay to open.

[0040] It should be noted that the demodulation, decoding and frame buffer mechanisms are set up on the slave board to ensure the accuracy of the control instructions and effectively avoid the malfunction of the circuit breaker due to signal interference or transmission errors, thereby improving the safety of the system, especially when conducting regular inspections on the main transformer protection system, avoiding potential equipment damage and personal injury.

[0041] In summary, the remote auxiliary transmission method provided by the present invention can realize the remote control of the opening and closing of the circuit breaker through the system, and realize the remote and precise control of the opening and closing of the circuit breaker through wireless reception, decoding and relay control. The reliability and accuracy of the experimental results are effectively ensured, especially when conducting the circuit breaker anti-trip test, there is no need for personnel to go to the site to short-close the circuit breaker, which effectively solves the work efficiency problem under the condition of lack of personnel and avoids potential safety risks. The present invention effectively solves the problems of low efficiency and poor safety in the maintenance work of relay protection in substations.

[0042] Example 2

[0043] The second embodiment of the present invention provides a remote auxiliary transmission method. In order to verify the effectiveness of the remote auxiliary transmission method in the substation circuit breaker transmission test, the following experimental environment is built: the substation main control room and the switch site are simulated, and different distances and obstacles are set between the two to test the performance of the method in different environments. The experimental system includes a main control board and three slave boards, and its hardware configuration is as described in the overall solution.

[0044] Before the experiment, the hardware and software were configured first. On the main control board, STM32CubeMX was used to configure GPIO and USART, and a program was written to implement the functions of GPIO status reading, control signal generation, encoding, modulation, and sending through the 433MHz wireless module. The control signal is designed in a simple instruction format. For example, 0x01 represents the closing of slave board No. 1, 0x02 represents the opening of slave board No. 1, and so on. On the slave board, STM32CubeMX was also used to configure GPIO, USART and 433MHz wireless module, and a program was written to implement signal reception, demodulation, decoding, GPIO status setting, relay control and other functions.

[0045] During the experiment, the main control board and the slave board were first connected to a 5V DC power supply. Then, the slave board was placed next to the circuit breakers at three different locations in the simulated switch field, and the three circuit breakers at different locations were simulated and controlled, and the distance and obstacles between each location and the main control room were recorded.

[0046] Next, the circuit breaker transmission test was carried out. The experimenter operated the buttons on the main control panel in the main control room to simulate the closing and opening operations of the circuit breakers in three different positions. After each operation, the sending time of the control signal, the receiving time from the panel, the relay action time, and the actual opening and closing status of the circuit breaker were recorded. At the same time, a stopwatch was used to record the time required for traditional manual operation to complete the same action.

[0047] In order to more comprehensively evaluate the performance of this method, tests were conducted in three different environments:

[0048] Ideal environment: The distance between the main control room and the switch site is short (10 meters) and there are no obstacles;

[0049] Medium environment: The distance between the main control room and the switch site is medium (50 meters), and there are few obstacles (such as walls);

[0050] Complex environment: The distance between the main control room and the switch site is far (100 meters), and there are many obstacles (such as walls and metal equipment);

[0051] In each environment, each circuit breaker was closed 10 times and opened 10 times, and all the data were recorded, as shown in Table 1.

[0052] Table 1

[0053]

[0054] In the above experiments, a large amount of data on the remote auxiliary drive method in the substation circuit breaker drive test was collected by simulating tests under different environmental conditions. These data include not only the sending and receiving time of the control signal, but also the relay action time and the circuit breaker action time.

[0055] After completing the experiment in the simulation environment, the data results of the actual operation on site were further collected, as shown in Table 2, which records the experimental data in the actual on-site environment. These data reflect in detail the performance of the remote auxiliary drive method in the real substation operation, including the total time from the control signal being sent to the on-site relay action, and the time efficiency compared with traditional manual operation.

[0056] Table 2

[0057]

[0058] By analyzing the experimental data and comparing the data in the simulation environment in Table 1 with the actual field data in Table 2, we can clearly see the advantages of the remote auxiliary transmission method:

[0059] Significantly improve efficiency: From the comparison of "circuit breaker action time" and "manual operation time", it can be seen that the remote auxiliary transmission method significantly shortens the circuit breaker operation time. Especially in complex environments, the advantages of this method are more obvious. For example, in a complex environment with a distance of 100 meters and the presence of walls and metal equipment, the remote control circuit breaker action time is about 70ms on average, while manual operation takes about 108 seconds, which is nearly 1543 times more efficient. The actual test results in the actual substation are shown in Table 2. The actual efficiency improvement is also about 45 times, saving an average of 9 minutes. This shows that this method can greatly improve the efficiency of substation circuit breaker transmission tests and save a lot of time and labor costs.

[0060] Enhanced control reliability and safety: Experimental data show that the remote auxiliary transmission method can stably and reliably control the circuit breaker to close and open in different environments. The transmission, reception and processing of control signals all show high stability, and the time difference between the circuit breaker action time and the control signal sending time is very small and fluctuates little. This shows that this method can effectively avoid possible misoperation and delays in traditional manual operation, improve the reliability and safety of control, especially when performing regular inspections on the main transformer protection system, it can effectively avoid potential equipment damage and personal injury.

[0061] Realize remote control: Experimental data show that even at a distance of 100 meters and in a complex environment with many obstacles, this method can still effectively control the circuit breaker. This shows that this method has strong anti-interference ability and remote control ability, breaking through the distance limitation of traditional control methods and providing new possibilities for remote maintenance and control of substations.

[0062] Digital control and recording: By recording data such as control signal sending time, receiving time, and relay action time, the entire control process can be finely managed and analyzed. This helps to discover and solve potential problems in a timely manner, further improve the reliability and safety of the system, and also provides data support for subsequent maintenance and optimization.

[0063] Compared with the existing technology, the present invention realizes the remote, automated and refined circuit breaker transmission test by introducing wireless communication technology and automated control means. This not only solves the problems of inconvenient operation, long response time and limited control distance in the existing technology, but also significantly improves work efficiency and safety, and has obvious innovation and practical value.

[0064] Example 3

[0065] Reference Figure 4 , which is the third embodiment of the present invention, provides a remote auxiliary transmission system, which includes:

[0066] Specifically, the main control board 100 and n groups of slave boards 200, where n≥1, the main control board 100 sends a signal to the corresponding slave board 200 over a long distance through wireless transmission.

[0067] Furthermore, the main control board 100 includes a first single chip microcomputer 101 , a wireless transmission module 102 , n groups of switch buttons 103 and n combination switch buttons 104 .

[0068] Furthermore, the slave board 200 includes a second single chip microcomputer 201 , a wireless receiving module 202 , and a relay control module 203 .

[0069] Furthermore, the relay control module 203 also includes a closing DC relay 203a and an opening DC relay 203b.

[0070] It should be noted that this embodiment provides a method of using three groups of slave boards, namely slave board 200-A, slave board 200-B and slave board 200-C. The main control board 100 is provided with three groups of switching buttons 103 and three combination switching buttons 104, namely opening button 103-A, opening button 103-B, opening button 103-C and closing button 104-A, closing button 104-B, closing button 104-C.

[0071] When in use, take the closing and opening of slave board 200a as an example:

[0072] When the opening button 103-A of the slave board A is pressed on the main control board 100, the first single-chip computer 101 recognizes the status information and transmits it to the slave board 200a through the wireless transmission module 102. After receiving the data, the wireless receiving module 202 of the slave board 200a transmits it to the second single-chip computer 201. The second single-chip computer 201 outputs a low level to the signal port of the opening DC relay 203b, and the opening DC relay 203b is actuated to close its normally open contact.

[0073] When the closing button 104-A of the slave board A is pressed on the main control board 100, the first single-chip microcomputer 101 recognizes the status information and transmits it to the slave board 200a through the wireless sending module 102. After receiving the data, the wireless receiving module 202 of the slave board 200a transmits it to the second single-chip microcomputer 201. The second single-chip microcomputer 201 outputs a low level to the signal port of the opening DC relay 203b, and the closing DC relay 203a is activated to close its normally open contacts.

[0074] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "system plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0075] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0076] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0077] 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 remote auxiliary transmission method, characterized in that: The main control board reads the GPIO status and generates control signals; The main control board transmits the control signal to the slave board through the wireless transmission module; The slave board wireless receiving module receives the control signal and sets the GPIO state according to the decoded content, triggering the relay control action.

2. The remote auxiliary transmission method according to claim 1, characterized in that: The GPIO status is whether the closing and opening buttons are pressed; The steps of the main control board reading the GPIO state and generating a control signal are as follows: the main control board generates a closing or opening control signal by reading the state of the closing and opening buttons.

3. The remote auxiliary transmission method according to claim 2, characterized in that: The wireless sending module and the wireless receiving module both adopt 433MHz wireless modules.

4. The remote auxiliary transmission method according to claim 3, characterized in that: The process of the main control board transmitting the control signal to the slave board through the wireless transmission module is that the wireless transmission module on the main board encodes and modulates the closing and opening control signals, and the wireless transmission module transmits them to the slave board in the form of low-frequency broadcasting.

5. The remote auxiliary transmission method according to claim 4, characterized in that: The process of receiving the control signal from the wireless receiving module of the slave board and setting the GPIO state according to the decoded content is as follows: after receiving the RF signal from the wireless module of the slave board, the signal is converted into raw data through the demodulation circuit, and decoded through the decoding circuit, and finally the decoded control information is output to the frame buffer, and the GPIO state is set according to the content of the frame buffer.

6. The remote auxiliary transmission method according to claim 5, characterized in that: The control action of triggering the relay from the board includes two actions: When the GPIO status read by the main board is closed, the slave board triggers the relay closing action; When the GPIO status read by the main board is open, the slave board triggers the relay to open.

7. A remote auxiliary transmission system, based on the remote auxiliary transmission method according to any one of claims 1 to 6, characterized in that: Also includes, A main control board (100) and n groups of slave boards (200), where n≥1, the main control board (100) sends a signal to a corresponding slave board (200) over a long distance via wireless transmission.

8. The remote auxiliary transmission system according to claim 7, characterized in that: The main control board (100) comprises a first single-chip computer (101), a wireless transmission module (102), n groups of gate buttons (103) and n combination gate buttons (104).

9. The remote auxiliary transmission system according to claim 8, characterized in that: The slave board (200) comprises a second single-chip computer (201), a wireless receiving module (202), and a relay control module (203).

10. The remote auxiliary transmission system according to claim 9, characterized in that: The relay control module (203) further comprises a closing DC relay (203a) and an opening DC relay (203b).

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