Energy-saving high-voltage switchgear and control method

Abstract

The present invention discloses an energy-saving high-voltage switchgear and control method, which relates to the field of energy-saving technology for high-voltage switchgear, and includes a high-voltage switchgear body, a multi-modal busbar monitoring unit, and an active electromagnetic compensation unit. The multi-modal busbar monitoring unit is installed on the periphery of multiple busbars of the high-voltage switchgear body, and monitors the temperature and non-contact pressure fluctuations of the multiple busbars respectively. By monitoring the temperature and non-contact pressure fluctuations of the busbars in real time, it is possible to accurately predict the change in busbar resistance, thereby performing electromagnetic compensation in a timely manner when the resistance increases, reducing losses during power transmission. Active electromagnetic compensation can dynamically adjust the compensation magnetic field to ensure the stability of the busbar contact point resistance, reduce arcing and faults caused by poor contact, and improve the stability and reliability of the system. By reducing resistance losses, the overall energy consumption of the switchgear is reduced, which contributes to energy conservation and emission reduction, and is in line with the development trend of green environmental protection.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving control of high-voltage switch cabinets, and in particular to an energy-saving high-voltage switch cabinet and a control method thereof. Background Art

[0002] High-voltage switchgear is a very important equipment in the power system, mainly used to control and protect high-voltage electrical equipment.

[0003] Oxidation of the busbars in high-voltage switchgear can lead to higher energy consumption. Busbar oxidation increases contact resistance, which in turn increases power loss. Specifically, busbar oxidation forms an oxide film on its surface, which increases contact resistance, causing more heat to be generated when current passes through, thereby increasing energy consumption. Furthermore, busbar oxidation also affects the busbar's electrical conductivity, reducing its current carrying capacity and further increasing energy consumption.

[0004] The main causes of busbar oxidation include:

[0005] Poor electrical contact: Loose bolts, oxidation of the lap joint, local arc erosion, etc. can lead to poor electrical contact, causing the busbar temperature to rise;

[0006] Environmental factors: Operating environment factors such as humidity, temperature, dust and dirtiness will also affect the oxidation rate and conductivity of the busbar;

[0007] Frequent operation will also accelerate the wear and aging of the busbar, resulting in increased contact resistance;

[0008] To prevent busbar oxidation and reduce its impact on energy consumption, regularly check the busbar connections to ensure bolts are tight and joints are clean. Improve the operating environment by keeping the interior of the switchgear clean to reduce dust and moisture accumulation. Apply antioxidants or use anti-oxidation materials on the busbar surface to extend its service life. Regularly inspect and maintain the busbars to promptly replace any substandard busbars.

[0009] The above measures are usually relatively passive and cannot deal with the surface oxide layer in a timely manner. For industrial high-voltage switchgear under harsh working conditions, surface oxidation may occur in a short period of time, such as one year, leading to increased energy consumption. Therefore, it is urgent to design an active high-voltage switchgear busbar status monitoring and oxidation treatment method and device to solve the energy consumption problem of the high-voltage switchgear. Summary of the Invention

[0010] In order to solve the technical problems of the above-mentioned high-voltage switchgear, the present invention provides an energy-saving high-voltage switchgear and a control method. The following technical solutions are adopted:

[0011] An energy-saving high-voltage switchgear cabinet includes a high-voltage switchgear cabinet body, a multi-modal busbar monitoring unit and an active electromagnetic compensation unit. The multi-modal busbar monitoring unit is installed on the periphery of multiple busbars of the high-voltage switchgear cabinet body, and monitors the temperature and non-contact pressure fluctuations of the multiple busbars respectively. Based on the temperature and non-contact pressure fluctuations, the resistance changes of the multiple busbars are predicted respectively, and a standard resistance threshold is set. The current resistance value is compared with the standard resistance threshold, and a resistance increase threshold is set. If the difference between the current resistance value and the standard resistance threshold is greater than the resistance increase threshold, an electromagnetic compensation control instruction is generated based on an electromagnetic compensation algorithm. The active electromagnetic compensation unit includes multiple electromagnetic compensators and an electromagnetic compensation controller. The multiple electromagnetic compensators are respectively surrounded by the periphery of the multiple busbars, and are used to form a compensation magnetic field on the periphery of the busbars. The electromagnetic compensation controller exchanges electromagnetic compensation control instructions with the multi-modal busbar monitoring unit, and controls the execution actions of the multiple electromagnetic compensators respectively based on the electromagnetic compensation control instructions.

[0012] By implementing this technical solution, real-time monitoring of busbar temperature and non-contact pressure fluctuations allows accurate prediction of busbar resistance changes, enabling timely electromagnetic compensation when resistance increases, reducing losses during power transmission. This reduces heat generation caused by increased resistance, minimizes wear on the busbar and contact components, and extends the service life of the switchgear and its components.

[0013] Active electromagnetic compensation can dynamically adjust the compensation magnetic field to ensure stable resistance at the busbar contact points, reduce arcing and faults caused by poor contact, and improve system stability and reliability.

[0014] By reducing resistance loss, the overall energy consumption of the switch cabinet is reduced, which helps save energy and reduce emissions and is in line with the development trend of green environmental protection.

[0015] The use of advanced monitoring technology and electromagnetic compensation algorithms realizes intelligent management of switchgear and improves the automation level of the power system.

[0016] The multimodal busbar monitoring unit can monitor the busbar status in real time, and the active electromagnetic compensation unit can quickly respond to resistance changes, realizing real-time control and optimization of the switchgear operating status.

[0017] Due to the reduction of failure rate and extension of equipment life, the corresponding maintenance costs will also be reduced, reducing the downtime and maintenance workload caused by equipment failure.

[0018] By reducing arcing and overheating, the risk of fire and explosion is reduced, improving the safety of industrial power systems.

[0019] Energy-saving high-voltage switchgear has significant technical effects in improving power transmission efficiency, extending equipment life, optimizing system stability, saving energy and reducing consumption, intelligent management, real-time monitoring and rapid response, reducing maintenance costs and improving safety.

[0020] Optionally, the multimodal busbar monitoring unit includes a surrounding shell, a distributed optical fiber temperature measurement system, a micromanometer array, and a monitoring data analysis and instruction generation module. The surrounding shell surrounds the periphery of the busbar, and multiple temperature sensor head arrays of the distributed optical fiber temperature measurement system are installed on the inner wall of the surrounding shell. Multiple micromanometer arrays of the micromanometer array are installed on the inner wall of the surrounding shell. The monitoring data analysis and instruction generation module is respectively communicated with the distributed optical fiber temperature measurement system and the micromanometer array. The monitoring data analysis and instruction generation module predicts the resistance changes of multiple busbars based on temperature and non-contact pressure fluctuations, and generates electromagnetic compensation control instructions based on the electromagnetic compensation algorithm. The monitoring data analysis and instruction generation module communicates with the electromagnetic compensation controller to exchange electromagnetic compensation control instructions.

[0021] Optionally, the monitoring data analysis and instruction generation module includes a memory and a computer, the memory stores an electromagnetic compensation control instruction set, the memory is communicatively connected to the distributed optical fiber temperature measurement system and the micromanometer array respectively, the computer is communicatively connected to the memory, the computer generates electromagnetic compensation control instructions, and is communicatively connected to the electromagnetic compensation controller.

[0022] By adopting the above technical solution and integrating the distributed optical fiber temperature measurement system and the micromanometer array, the temperature and non-contact pressure fluctuations of the busbar can be monitored simultaneously, providing comprehensive busbar status monitoring, which helps to more accurately evaluate the operating status of the busbar and provide raw data for subsequent computer analysis and calculation of the current resistance value of the busbar. The monitoring data analysis and instruction generation module can generate electromagnetic compensation control instructions according to the changes in resistance value based on the pre-stored electromagnetic compensation control instruction set, thereby realizing automated electromagnetic compensation control.

[0023] Optionally, the electromagnetic compensator includes a plurality of surrounding coils and a driving circuit, the plurality of surrounding coils are respectively mounted on the inner wall of the shell, and the electromagnetic compensation controller controls the execution actions of the plurality of surrounding coils respectively through the driving circuit.

[0024] By adopting this technical solution and deploying multiple encircling coils, precise electromagnetic compensation can be performed on specific sections of the busbar, effectively reducing contact resistance variations and improving compensation accuracy. Each encircling coil has a corresponding drive circuit, enabling distributed electromagnetic compensation, allowing for personalized compensation for different busbar sections and increasing compensation flexibility.

[0025] The electromagnetic compensation controller adjusts the drive circuit in real time according to electromagnetic compensation control commands, achieving rapid response to the surrounding coils. This compensates for changes in busbar resistance in real time, maintaining stable busbar performance. By reducing busbar contact resistance, power transmission losses are reduced, power transmission efficiency is improved, and energy conservation is facilitated. Heat generation caused by resistance changes is also reduced, reducing wear on the busbar and contact components, thereby extending the service life of the switchgear and its components.

[0026] Electromagnetic compensation helps reduce arcing and overheating, improves the operating stability of the switchgear, and reduces the probability of failure.

[0027] Through the beneficial technical effects of precise compensation, distributed control, real-time adjustment, improved transmission efficiency, extended equipment life, enhanced system stability, strong adaptability, simple maintenance, improved safety and intelligent integration, it provides an efficient, stable and reliable electromagnetic compensation solution for the operation of high-voltage switchgear.

[0028] Optionally, the electromagnetic compensation controller includes an instruction cache and a control chip, wherein the instruction cache is connected to the computer for exchanging electromagnetic compensation control instructions, and the control chip is connected to the instruction cache for respectively controlling the execution actions of the plurality of electromagnetic compensators.

[0029] An energy-saving control method for an energy-saving high-voltage switchgear is used to control the energy consumption of an energy-saving high-voltage switchgear, comprising the following steps:

[0030] Step 1: The distributed optical fiber temperature measurement system collects the temperature data of the busbar, and the micromanometer array collects the non-contact pressure fluctuation data of the busbar;

[0031] Step 2: The computer predicts the change of busbar resistance based on the temperature data and the non-contact pressure fluctuation data;

[0032] Step 3: The computer compares the predicted resistance value with the standard resistance threshold and determines whether the difference between the resistance value and the standard resistance threshold exceeds the resistance increase threshold;

[0033] Step 4: If the resistance increase threshold is exceeded in step 3, the computer generates an electromagnetic compensation control instruction based on the electromagnetic compensation algorithm;

[0034] Step 5: The electromagnetic compensation controller controls the action of the electromagnetic compensator according to the generated compensation current instruction.

[0035] Optionally, in step 2, the formula for predicting busbar resistance change is:

[0036] R_pred(t)=R0+kT·ΔT(t)+kP·ΔP(t);

[0037] Where R_pred(t) is the predicted busbar resistance at time t; R0 is the initial busbar resistance; kT is the temperature coefficient; ΔT(t) is the temperature change at time t; kP is the pressure coefficient; ΔP(t) is the pressure change at time t.

[0038] Optionally, in step 3, the formula for calculating the difference between the resistance value and the standard resistance threshold is:

[0039] ΔR(t)=R_pred(t)-R_threshold;

[0040] ΔR(t) is the difference between the resistance value at time t and the standard resistance threshold, R_pred(t) is the predicted busbar resistance value at time t, and R_threshold is the standard busbar resistance threshold;

[0041] If ΔR(t)>ΔR_threshold, proceed to step 4; where ΔR_threshold is the resistance increase threshold.

[0042] Optionally, the algorithm formula for generating the electromagnetic compensation control instruction in step 4 is:

[0043] l_comp(t)=K·ΔR(t);

[0044] Where l_comp(t) is the compensation current at time t, K is the electromagnetic compensation, and ΔR(t) is the difference between the resistance value at time t and the standard resistance threshold;

[0045]

[0046] Where V_comp(t) is the compensation voltage at time t, L is the inductance of the electromagnetic coil, is the rate of change of the compensation current.

[0047] In summary, the present invention includes at least one of the following beneficial technical effects:

[0048] The present invention can provide an energy-saving high-voltage switchgear and control method. By real-time monitoring of busbar temperature and non-contact pressure fluctuations, changes in busbar resistance can be accurately predicted, thereby performing electromagnetic compensation in a timely manner when resistance increases, reducing losses during power transmission.

[0049] Active electromagnetic compensation can dynamically adjust the compensation magnetic field to ensure stable resistance at the busbar contact points, reduce arcing and faults caused by poor contact, and improve system stability and reliability.

[0050] By reducing resistance loss, the overall energy consumption of the switch cabinet is reduced, which helps save energy and reduce emissions and is in line with the development trend of green environmental protection.

[0051] Due to the reduction of failure rate and extension of equipment life, the corresponding maintenance costs will also be reduced, reducing the downtime and maintenance workload caused by equipment failure.

[0052] By reducing arcing and overheating, the risk of fire and explosion is reduced, improving the safety of industrial power systems.

[0053] Energy-saving high-voltage switchgear has significant technical effects in improving power transmission efficiency, extending equipment life, optimizing system stability, saving energy and reducing consumption, intelligent management, real-time monitoring and rapid response, reducing maintenance costs and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of the connection principle of electrical components of an energy-saving high-voltage switchgear cabinet of the present invention;

[0055] Figure 2 This is a partial cross-sectional structural diagram of an energy-saving high-voltage switchgear cabinet according to the present invention;

[0056] Figure 3 The present invention is a flowchart of an energy-saving control method for an energy-saving high-voltage switchgear.

[0057] Description of the drawings: 1. High-voltage switchgear body; 21. Surrounding shell; 22. Distributed optical fiber temperature measurement system; 23. Micromanometer array; 24. Monitoring data analysis and instruction generation module; 241. Memory; 242. Computer; 31. Electromagnetic compensator; 311. Surrounding coil; 312. Drive circuit; 4. Electromagnetic compensation controller; 41. Instruction cache; 42. Control chip; 100. Busbar. DETAILED DESCRIPTION

[0058] The present invention will be further described in detail below with reference to the accompanying drawings.

[0059] The embodiments of the present invention disclose an energy-saving high-voltage switchgear and a control method.

[0060] Reference Figure 1-Figure 3, Example 1, an energy-saving high-voltage switchgear, including a high-voltage switchgear body 1, a multi-modal busbar monitoring unit and an active electromagnetic compensation unit, the multi-modal busbar monitoring unit is installed on the periphery of multiple busbars 100 of the high-voltage switchgear body 1, and monitors the temperature and non-contact pressure fluctuations of the multiple busbars 100 respectively, predicts the resistance changes of the multiple busbars 100 based on the temperature and non-contact pressure fluctuations, sets a standard resistance threshold, compares the current resistance value with the standard resistance threshold, and sets a resistance increase threshold. If the difference between the current resistance value and the standard resistance threshold is greater than the resistance increase threshold, an electromagnetic compensation control instruction is generated based on the electromagnetic compensation algorithm. The active electromagnetic compensation unit includes multiple electromagnetic compensators 31 and an electromagnetic compensation controller 4. The multiple electromagnetic compensators 31 are respectively surrounded by the periphery of the multiple busbars 100, and are used to form a compensation magnetic field on the periphery of the busbar 100. The electromagnetic compensation controller 4 exchanges electromagnetic compensation control instructions with the multi-modal busbar monitoring unit, and controls the execution actions of the multiple electromagnetic compensators 31 based on the electromagnetic compensation control instructions.

[0061] By real-time monitoring of busbar 100 temperature and non-contact pressure fluctuations, changes in busbar 100 resistance can be accurately predicted, enabling timely electromagnetic compensation when resistance increases, reducing losses during power transmission. This reduces heat generation caused by increased resistance, minimizes wear on busbar 100 and contact components, and extends the service life of the switchgear and its components.

[0062] Active electromagnetic compensation can dynamically adjust the compensation magnetic field to ensure stable resistance at the busbar 100 contact points, reducing arcs and faults caused by poor contact and improving system stability and reliability.

[0063] By reducing resistance loss, the overall energy consumption of the switch cabinet is reduced, which helps save energy and reduce emissions and is in line with the development trend of green environmental protection.

[0064] The use of advanced monitoring technology and electromagnetic compensation algorithms realizes intelligent management of switchgear and improves the automation level of the power system.

[0065] The multimodal busbar monitoring unit can monitor the busbar status in real time, and the active electromagnetic compensation unit can quickly respond to resistance changes, realizing real-time control and optimization of the switchgear operating status.

[0066] Due to the reduction of failure rate and extension of equipment life, the corresponding maintenance costs will also be reduced, reducing the downtime and maintenance workload caused by equipment failure.

[0067] By reducing arcing and overheating, the risk of fire and explosion is reduced, improving the safety of industrial power systems.

[0068] Energy-saving high-voltage switchgear has significant technical effects in improving power transmission efficiency, extending equipment life, optimizing system stability, saving energy and reducing consumption, intelligent management, real-time monitoring and rapid response, reducing maintenance costs and improving safety.

[0069] Example 2, the multimodal busbar monitoring unit includes a surrounding shell 21, a distributed optical fiber temperature measurement system 22, a micromanometer array 23, and a monitoring data analysis and instruction generation module 24. The surrounding shell 21 surrounds the periphery of the busbar 100, and multiple temperature sensor head arrays of the distributed optical fiber temperature measurement system 22 are installed on the inner wall of the surrounding shell 21. Multiple micromanometer arrays of the micromanometer array 23 are installed on the inner wall of the surrounding shell 21. The monitoring data analysis and instruction generation module 24 is respectively communicated with the distributed optical fiber temperature measurement system 22 and the micromanometer array 23. The monitoring data analysis and instruction generation module 24 predicts the resistance changes of multiple busbars 100 based on temperature and non-contact pressure fluctuations, and generates electromagnetic compensation control instructions based on the electromagnetic compensation algorithm. The monitoring data analysis and instruction generation module 24 communicates with the electromagnetic compensation controller 4 to exchange electromagnetic compensation control instructions.

[0070] Example 3, the monitoring data analysis and instruction generation module 24 includes a memory 241 and a computer 242, the memory 241 stores the electromagnetic compensation control instruction set, the memory 241 is communicated with the distributed optical fiber temperature measurement system 22 and the micromanometer array 23 respectively, the computer 242 is communicated with the memory 241, the computer 242 generates electromagnetic compensation control instructions, and is communicated with the electromagnetic compensation controller 4.

[0071] By integrating the distributed optical fiber temperature measurement system 22 and the micromanometer array 23, the temperature and non-contact pressure fluctuations of the busbar 100 can be monitored simultaneously, providing comprehensive busbar status monitoring, which helps to more accurately evaluate the operating status of the busbar and provide raw data for the subsequent computer 242 to analyze and calculate the current resistance value of the busbar 100. The monitoring data analysis and instruction generation module 24 can generate electromagnetic compensation control instructions according to the changes in resistance value based on the pre-stored electromagnetic compensation control instruction set, thereby realizing automated electromagnetic compensation control.

[0072] In embodiment 4, the electromagnetic compensator 31 includes a plurality of surrounding coils 311 and a driving circuit 312 . The plurality of surrounding coils 311 are respectively mounted on the inner wall of the shell 21 . The electromagnetic compensation controller 4 controls the execution actions of the plurality of surrounding coils 311 through the driving circuit 312 .

[0073] The layout of multiple encircling coils 311 allows precise electromagnetic compensation for specific sections of the busbar 100, effectively reducing contact resistance variations and improving compensation accuracy. Each encircling coil 311 has a corresponding drive circuit 312, enabling distributed electromagnetic compensation and personalized compensation for different busbar sections, enhancing compensation flexibility.

[0074] The electromagnetic compensation controller 4 can adjust the drive circuit 312 in real time according to electromagnetic compensation control instructions, achieving a rapid response to the surrounding coil 311. This compensates for changes in busbar 100 resistance in real time, maintaining stable busbar performance. By reducing busbar contact resistance, power transmission losses are reduced, power transmission efficiency is improved, and energy conservation is facilitated. Heat generation caused by resistance changes is also reduced, reducing wear on the busbar and contact components, thereby extending the service life of the switchgear and its components.

[0075] Electromagnetic compensation helps reduce arcing and overheating, improves the operating stability of the switchgear, and reduces the probability of failure.

[0076] Through the beneficial technical effects of precise compensation, distributed control, real-time adjustment, improved transmission efficiency, extended equipment life, enhanced system stability, strong adaptability, simple maintenance, improved safety and intelligent integration, it provides an efficient, stable and reliable electromagnetic compensation solution for the operation of high-voltage switchgear.

[0077] In embodiment 5, the electromagnetic compensation controller 4 includes an instruction cache 41 and a control chip 42. The instruction cache 41 is connected to the computer 242 for communicating and exchanging electromagnetic compensation control instructions. The control chip 42 is connected to the instruction cache 41 and controls the execution actions of multiple electromagnetic compensators 31 respectively.

[0078] Example 6, an energy-saving control method for an energy-saving high-voltage switchgear, for controlling energy consumption of an energy-saving high-voltage switchgear, comprises the following steps:

[0079] Step 1: The distributed optical fiber temperature measurement system 22 collects temperature data of the busbar 100, and the micromanometer array 23 collects non-contact pressure fluctuation data of the busbar 100;

[0080] Step 2: The computer 242 predicts the change in busbar resistance based on the temperature data and the non-contact pressure fluctuation data;

[0081] Step 3: The computer 242 compares the predicted resistance value with the standard resistance threshold and determines whether the difference between the resistance value and the standard resistance threshold exceeds the resistance increase threshold;

[0082] Step 4: If the resistance increase threshold is exceeded in step 3, the computer 242 generates an electromagnetic compensation control instruction based on the electromagnetic compensation algorithm;

[0083] In step 5, the electromagnetic compensation controller 4 controls the operation of the electromagnetic compensator 31 according to the generated compensation current command.

[0084] In Example 7, in step 2, the formula for predicting the busbar resistance change is:

[0085] R_pred(t)=R0+kT·ΔT(t)+kP·ΔP(t);

[0086] Where R_pred(t) is the predicted resistance value of the busbar 100 at time t; R0 is the initial resistance of the busbar 100; kT is the temperature coefficient; ΔT(t) is the temperature change at time t; kP is the pressure coefficient; ΔP(t) is the pressure change at time t.

[0087] In Example 8, in step 3, the formula for calculating the difference between the resistance value and the standard resistance threshold is:

[0088] ΔR(t)=R_pred(t)-R_threshold;

[0089] ΔR(t) is the difference between the resistance value at time t and the standard resistance threshold, R_pred(t) is the predicted resistance value of the busbar 100 at time t, and R_threshold is the standard resistance threshold of the busbar 100;

[0090] If ΔR(t)>ΔR_threshold, proceed to step 4; where ΔR_threshold is the resistance increase threshold.

[0091] In Example 9, the algorithm formula for generating the electromagnetic compensation control instruction in step 4 is:

[0092] l_comp(t)=K·ΔR(t);

[0093] Where l_comp(t) is the compensation current at time t, K is the electromagnetic compensation, and ΔR(t) is the difference between the resistance value at time t and the standard resistance threshold;

[0094]

[0095] Where V_comp(t) is the compensation voltage at time t, L is the inductance of the electromagnetic coil, is the rate of change of the compensation current.

[0096] The following uses a specific embodiment to illustrate the implementation principle of an energy-saving high-voltage switchgear and control method of the present invention:

[0097] High-voltage switchgear in a power system distributes high-voltage power to different areas. Over time, the busbar contact resistance gradually increases, leading to increased energy consumption and shortened equipment life. Energy-saving high-voltage switchgear is required.

[0098] Install the monitoring unit:

[0099] A multi-modal busbar monitoring unit is installed around the multiple busbars 100 of the high-voltage switchgear, including a surrounding shell 21, a distributed optical fiber temperature measurement system 22, and a micromanometer array 23;

[0100] The sensor head array and micromanometer array 23 of the distributed optical fiber temperature measurement system 22 are mounted on the inner wall surrounding the housing 21;

[0101] The distributed optical fiber temperature measurement system 22 and the micromanometer array 23 begin to collect temperature and non-contact pressure fluctuation data of the busbar 100 .

[0102] The computer 242 of the monitoring data analysis and instruction generation module 24 uses the formula to predict the change of busbar resistance based on the collected data:

[0103] R_pred(t)=R0+kT·ΔT(t)+kP·ΔP(t);

[0104] Where R_pred(t) is the predicted resistance value of the busbar 100 at time t; R0 is the initial resistance of the busbar 100; kT is the temperature coefficient; ΔT(t) is the temperature change at time t; kP is the pressure coefficient; ΔP(t) is the pressure change at time t.

[0105] Resistance threshold comparison and compensation instruction generation:

[0106] The computer 242 compares the predicted resistance value with a preset standard resistance threshold and calculates the difference: ΔR(t)=R_pred(t)-R_threshold;

[0107] ΔR(t) is the difference between the resistance value at time t and the standard resistance threshold, R_pred(t) is the predicted resistance value of the busbar 100 at time t, and R_threshold is the standard resistance threshold of the busbar 100;

[0108] If ΔR(t)>ΔR_threshold, proceed to step 4 to generate the electromagnetic compensation control instruction; wherein ΔR_threshold is the resistance increase threshold.

[0109] The computer 242 generates an electromagnetic compensation control instruction according to the electromagnetic compensation algorithm: l_comp(t)=K·ΔR(t);

[0110] Where l_comp(t) is the compensation current at time t, K is the electromagnetic compensation, and ΔR(t) is the difference between the resistance value at time t and the standard resistance threshold;

[0111]

[0112] Where V_comp(t) is the compensation voltage at time t, L is the inductance of the electromagnetic coil, is the rate of change of the compensation current.

[0113] To perform electromagnetic compensation:

[0114] The electromagnetic compensation controller 4 receives the electromagnetic compensation control instructions generated by the computer 242 and controls the actions of the plurality of electromagnetic compensators 31 through the instruction buffer 41 and the control chip 42 .

[0115] The multiple surrounding coils 311 of the electromagnetic compensator 31 are respectively installed on the inner wall of the housing 21 to generate a compensation magnetic field according to control instructions to reduce the contact resistance of the busbar 100.

[0116] Through the above implementation steps, energy-saving high-voltage switchgear can monitor busbar status in real time and dynamically perform electromagnetic compensation based on resistance changes, thereby reducing busbar contact resistance and energy transmission losses. This reduces busbar heating and extends equipment life. This improves switchgear operational stability and reliability, enabling intelligent switchgear management and enhancing the automation level of the power system.

[0117] To ensure the accuracy and reliability of the monitoring unit, calibrate it regularly.

[0118] The software of the monitoring data analysis and instruction generation module 24 needs to be updated regularly to optimize the compensation algorithm.

[0119] The maintenance and inspection of the electromagnetic compensator 31 should be carried out as planned to ensure its long-term stable operation.

[0120] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An energy-saving high-voltage switchgear, characterized by: The invention comprises a high-voltage switch cabinet body (1), a multi-mode busbar monitoring unit and an active electromagnetic compensation unit. The multi-mode busbar monitoring unit is installed on the periphery of multiple busbars (100) of the high-voltage switch cabinet body (1), and respectively monitors the temperature and non-contact pressure fluctuations of the multiple busbars (100). Based on the temperature and non-contact pressure fluctuations, the resistance changes of the multiple busbars (100) are respectively predicted, a standard resistance threshold is set, a current resistance value is compared with the standard resistance threshold, and a resistance increase threshold is set. If the difference between the current resistance value and the standard resistance threshold is greater than the resistance increase threshold, an electromagnetic compensation control instruction is generated based on an electromagnetic compensation algorithm. The active electromagnetic compensation unit comprises multiple electromagnetic compensators (31) and an electromagnetic compensation controller (4). The multiple electromagnetic compensators (31) are respectively surrounded on the periphery of the multiple busbars (100) and are used to form a compensation magnetic field on the periphery of the busbars (100). The electromagnetic compensation controller (4) exchanges electromagnetic compensation control instructions with the multi-mode busbar monitoring unit and controls the execution actions of the multiple electromagnetic compensators (31) based on the electromagnetic compensation control instructions.

2. The energy-saving high-voltage switchgear according to claim 1, characterized in that: The multi-modal busbar monitoring unit comprises a surrounding shell (21), a distributed optical fiber temperature measurement system (22), a micromanometer array (23), and a monitoring data analysis and instruction generation module (24). The surrounding shell (21) surrounds the periphery of the busbar (100). A plurality of temperature sensor head arrays of the distributed optical fiber temperature measurement system (22) are mounted on the inner wall of the surrounding shell (21). A plurality of micromanometer arrays of the micromanometer array (23) are mounted on the inner wall of the surrounding shell (21). The monitoring data analysis and instruction generation module (24) is respectively connected to the distributed optical fiber temperature measurement system (22) and the micromanometer array (23). The monitoring data analysis and instruction generation module (24) predicts resistance changes of the plurality of busbars (100) based on temperature and non-contact pressure fluctuations, and generates electromagnetic compensation control instructions based on an electromagnetic compensation algorithm. The monitoring data analysis and instruction generation module (24) communicates with the electromagnetic compensation controller (4) to exchange the electromagnetic compensation control instructions.

3. The energy-saving high-voltage switchgear according to claim 2, characterized in that: The monitoring data analysis and instruction generation module (24) includes a memory (241) and a computer (242). The memory (241) stores an electromagnetic compensation control instruction set. The memory (241) is respectively connected to the distributed optical fiber temperature measurement system (22) and the micromanometer array (23). The computer (242) is connected to the memory (241). The computer (242) generates electromagnetic compensation control instructions and is connected to the electromagnetic compensation controller (4).

4. The energy-saving high-voltage switchgear according to claim 3, characterized in that: The electromagnetic compensator (31) comprises a plurality of surrounding coils (311) and a drive circuit (312). The plurality of surrounding coils (311) are respectively mounted on the inner wall of the housing (21). The electromagnetic compensation controller (4) controls the execution actions of the plurality of surrounding coils (311) respectively through the drive circuit (312).

5. The energy-saving high-voltage switchgear according to claim 4, characterized in that: The electromagnetic compensation controller (4) includes an instruction buffer (41) and a control chip (42). The instruction buffer (41) is connected to a computer (242) for communicating and exchanging electromagnetic compensation control instructions. The control chip (42) is connected to the instruction buffer (41) for communicating and controlling the execution actions of the plurality of electromagnetic compensators (31).

6. An energy-saving control method for an energy-saving high-voltage switchgear, characterized in that: The method for controlling the energy consumption of an energy-saving high-voltage switchgear cabinet according to claim 5 comprises the following steps: Step 1: The distributed optical fiber temperature measurement system (22) collects temperature data of the busbar (100), and the micromanometer array (23) collects non-contact pressure fluctuation data of the busbar (100); Step 2, the computer (242) predicts the change of the busbar resistance based on the temperature data and the non-contact pressure fluctuation data; Step 3, the computer (242) compares the predicted resistance value with the standard resistance threshold, and determines whether the difference between the resistance value and the standard resistance threshold exceeds the resistance increase threshold; Step 4, if the resistance increase threshold is exceeded in step 3, the computer (242) generates an electromagnetic compensation control instruction based on the electromagnetic compensation algorithm; In step 5, the electromagnetic compensation controller (4) controls the action of the electromagnetic compensator (31) according to the generated compensation current instruction.

7. The energy-saving control method for an energy-saving high-voltage switchgear according to claim 6, characterized in that: In step 2, the formula for predicting the busbar resistance change is: R_pred(t)=R0+kT·ΔT(t)+kP·ΔP(t); Wherein R_pred(t) is the predicted resistance value of the busbar (100) at time t; R0 is the initial resistance of the busbar (100); kT is the temperature coefficient; ΔT(t) is the temperature change at time t; kP is the pressure coefficient; ΔP(t) is the pressure change at time t.

8. The energy-saving control method for an energy-saving high-voltage switchgear according to claim 7, characterized in that: In step 3, the formula for calculating the difference between the resistance value and the standard resistance threshold is: ΔR(t)=R_pred(t)-R_threshold; ΔR(t) is the difference between the resistance value at time t and the standard resistance threshold, R_pred(t) is the predicted resistance value of the busbar (100) at time t, and R_threshold is the standard resistance threshold of the busbar (100); If ΔR(t)>ΔR_threshold, proceed to step 4; where ΔR_threshold is the resistance increase threshold.

9. The energy-saving control method for an energy-saving high-voltage switchgear according to claim 8, characterized in that: The algorithm formula for generating electromagnetic compensation control instructions in step 4 is: l_comp(t)=K·ΔR(t); Where l_comp(t) is the compensation current at time t, K is the electromagnetic compensation, and ΔR(t) is the difference between the resistance value at time t and the standard resistance threshold; Where V_comp(t) is the compensation voltage at time t, L is the inductance of the electromagnetic coil, is the rate of change of the compensation current.

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