Energy-saving high-voltage switch cabinet and control method

Abstract

The invention discloses an energy-saving high-voltage switch cabinet and a control method, and relates to the technical field of energy conservation of high-voltage switch cabinets, the energy-saving high-voltage switch cabinet comprises a high-voltage switch cabinet body, a multi-mode busbar monitoring unit and an active electromagnetic compensation unit, the multi-mode busbar monitoring unit is installed on the periphery of a plurality of busbars of the high-voltage switch cabinet body, and the active electromagnetic compensation unit is installed on the periphery of the multi-mode busbar monitoring unit. The temperature and non-contact pressure fluctuation of a plurality of busbars are respectively monitored, and the temperature and non-contact pressure fluctuation of the busbars are monitored in real time, so that the resistance change of the busbars can be accurately predicted, electromagnetic compensation is carried out in time when the resistance is increased, and the loss in the electric energy transmission process is reduced. The active electromagnetic compensation can dynamically adjust the compensation magnetic field, ensures the stability of the busbar contact point resistance, reduces the electric arc and fault caused by poor contact, and improves the stability and reliability of the system. By reducing the resistance loss, the overall energy consumption of the switch cabinet is reduced, energy conservation and emission reduction are facilitated, and the switch cabinet conforms to the green and environment-friendly development trend.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving control of high-voltage switchgear, and particularly relates to an energy-saving high-voltage switchgear and a control method thereof. Background Art

[0002] High-voltage switchgear is a very important device in the power system, mainly used for controlling and protecting high-voltage electrical equipment.

[0003] Oxidation of the busbars in high-voltage switchgear will lead to higher energy consumption. Oxidation of the busbars will cause an increase in contact resistance, thereby increasing power loss. Specifically, oxidation of the busbars will form an oxide film on their surfaces, which will increase the contact resistance, cause more heat to be generated when current passes through, and further increase energy consumption. In addition, oxidation of the busbars will also affect the electrical conductivity of the busbars, reduce their current-carrying capacity, and further increase energy consumption.

[0004] The main reasons for busbar oxidation include:

[0005] Poor electrical contact: Loose bolts, oxidized lapping surfaces, local arc ablation, etc. will all cause poor electrical contact, thus causing the temperature of the busbars to rise;

[0006] Environmental factors: Operating environmental factors such as humidity, temperature, dust, and degree of pollution will also affect the oxidation rate and electrical conductivity of the busbars;

[0007] Frequent operation will also accelerate the wear and aging of the busbars, resulting in an increase in contact resistance;

[0008] In order to prevent busbar oxidation and reduce the impact of busbar oxidation on energy consumption, regularly check the connection status of the busbars, ensure that the bolts are tightened, the lapping surfaces are clean, and improve the operating environment: Keep the inside of the switchgear clean to reduce the accumulation of dust and moisture. Apply an antioxidant on the surface of the busbars or use antioxidant materials to extend the service life of the busbars, and replace the busbars that do not meet the standards in a timely manner through regular inspections and maintenance;

[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 with harsh working conditions, the surface may be oxidized and the energy consumption may increase in a relatively short period of time, such as one year. Therefore, there is an urgent need to design an active method and device for monitoring the status of high-voltage switchgear busbars and disposing of oxidation to solve the energy consumption problem of high-voltage switchgear. Summary of the Invention

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

[0011] An energy-saving high-voltage switchgear cabinet, comprising a high-voltage switchgear cabinet body, a multimodal busbar monitoring unit, and an active electromagnetic compensation unit. The multimodal busbar monitoring unit is installed around multiple busbars of the high-voltage switchgear cabinet body, respectively monitoring the temperature and non-contact pressure fluctuations of the multiple busbars, predicting the resistance changes of the multiple busbars based on the temperature and non-contact pressure fluctuations respectively, setting a standard resistance threshold, comparing the current resistance value with the standard resistance threshold, setting a resistance increase threshold, and if the difference between the current resistance value and the standard resistance threshold is greater than the resistance increase threshold, generating an electromagnetic compensation control instruction based on the electromagnetic compensation algorithm. The active electromagnetic compensation unit includes multiple electromagnetic compensators and an electromagnetic compensation controller. The multiple electromagnetic compensators are respectively arranged around the multiple busbars to form a compensation magnetic field around the busbars. The electromagnetic compensation controller interacts with the multimodal busbar monitoring unit for the electromagnetic compensation control instruction and controls the execution actions of the multiple electromagnetic compensators respectively based on the electromagnetic compensation control instruction.

[0012] By adopting the above technical solutions, by real-time monitoring the temperature and non-contact pressure fluctuations of the busbars, the change of the busbar resistance can be accurately predicted, so as to perform electromagnetic compensation in time when the resistance increases, reducing the loss in the process of electric energy transmission. The heat generation caused by the increase of resistance is reduced, the wear of the busbars and contact components is reduced, and the service life of the switchgear cabinet and its components is prolonged.

[0013] Active electromagnetic compensation can dynamically adjust the compensation magnetic field, ensure the stability of the busbar contact point resistance, reduce the arc and faults caused by poor contact, and improve the stability and reliability of the system.

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

[0015] By adopting advanced monitoring technologies and electromagnetic compensation algorithms, the intelligent management of the switchgear cabinet is realized, and the automation level of the power system is improved.

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

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

[0018] By reducing the arc and overheating phenomena, the risks of fire and explosion are reduced, and the safety of the industrial power system is improved.

[0019] The energy-saving high-voltage switchgear has significant technical effects in aspects such as improving the efficiency of electric energy transmission, extending the service life of equipment, optimizing system stability, saving energy and reducing consumption, intelligent management, real-time monitoring and rapid response, reducing maintenance costs, and enhancing safety.

[0020] Optionally, the multimodal busbar monitoring unit includes a surrounding housing, a distributed optical fiber temperature measurement system, a micro-pressure gauge array, a monitoring data analysis and instruction generation module. The surrounding housing surrounds the outer periphery of the busbar. Multiple temperature sensor heads of the distributed optical fiber temperature measurement system are array-mounted on the inner wall of the surrounding housing. Multiple micro-pressure gauges of the micro-pressure gauge array are array-mounted on the inner wall of the surrounding housing. The monitoring data analysis and instruction generation module is respectively communicatively connected to the distributed optical fiber temperature measurement system and the micro-pressure gauge array. The monitoring data analysis and instruction generation module predicts the resistance changes of multiple busbars based on temperature and non-contact pressure fluctuations respectively, and generates an electromagnetic compensation control instruction based on the electromagnetic compensation algorithm. The monitoring data analysis and instruction generation module communicates and exchanges the electromagnetic compensation control instruction with the electromagnetic compensation controller.

[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 respectively communicatively connected to the distributed optical fiber temperature measurement system and the micro-pressure gauge array. The computer is communicatively connected to the memory. The computer generates an electromagnetic compensation control instruction and is communicatively connected to the electromagnetic compensation controller.

[0022] By adopting the above technical solution, by integrating the distributed optical fiber temperature measurement system and the micro-pressure gauge array, it is possible to simultaneously monitor the temperature and non-contact pressure fluctuations of the busbar, providing comprehensive monitoring of the busbar status, which helps to more accurately evaluate the operating condition of the busbar and provides 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 an electromagnetic compensation control instruction according to the change of the resistance value based on the pre-stored electromagnetic compensation control instruction set, thereby realizing automatic electromagnetic compensation control.

[0023] Optionally, the electromagnetic compensator includes multiple surrounding coils and a driving circuit. The multiple surrounding coils are respectively surrounded and installed on the inner wall of the housing. The electromagnetic compensation controller controls the execution actions of the multiple surrounding coils respectively through the driving circuit.

[0024] By adopting the above technical solution, through the layout of multiple surrounding coils, precise electromagnetic compensation can be carried out for specific parts of the busbar, effectively reducing the change of contact resistance and improving the accuracy of compensation. Each surrounding coil has a corresponding driving circuit, enabling the electromagnetic compensation to be carried out distributively and providing personalized compensation for different segments of different busbars, thus enhancing the flexibility of compensation.

[0025] The electromagnetic compensation controller can adjust the drive circuit in real time according to the electromagnetic compensation control instruction, achieve a fast response to the surrounding coil, thereby compensating for the change of the busbar resistance in real time and maintaining the stable performance of the busbar. By reducing the busbar contact resistance, the power transmission loss is reduced, the power transmission efficiency is improved, and energy conservation is facilitated. The heat generated due to resistance change is reduced, the wear of the busbar and contact components is decreased, and the service life of the switchgear and its components is extended.

[0026] Electromagnetic compensation helps reduce arc and overheating phenomena, improves the operating stability of the switchgear, and reduces the probability of faults.

[0027] Through beneficial technical effects such as 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, etc., 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 buffer and a control chip. The instruction buffer is communicatively connected with a computer to interact electromagnetic compensation control instructions, and the control chip is communicatively connected with the instruction buffer and controls the execution actions of multiple electromagnetic compensators respectively.

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

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

[0031] Step 2, the computer predicts the change of the 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 judges whether the difference between the resistance value and the standard resistance threshold exceeds the resistance increase threshold;

[0033] Step 4, if it is judged in Step 3 that the resistance increase threshold is exceeded, 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 the change of the busbar resistance is:

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

[0037] Where R_pred(t) is the predicted resistance value of the busbar at time t; R0 is the initial resistance of the busbar; 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 calculation formula for 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 of the busbar, R_pred(t) is the predicted resistance value of the busbar at time t, and R_threshold is the standard resistance threshold of the busbar;

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

[0042] Optionally, the algorithm formula for generating the electromagnetic compensation control command 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 a control method. By real-time monitoring of the temperature and non-contact pressure fluctuations of the busbar, it can accurately predict the change of the busbar resistance, and thus perform electromagnetic compensation in time when the resistance increases, reducing the loss during the power transmission process.

[0049] Active electromagnetic compensation can dynamically adjust the compensation magnetic field, ensure the stability of the busbar contact point resistance, reduce the arcs and faults caused by poor contact, and improve the stability and reliability of the system.

[0050] By reducing the resistance loss, the overall energy consumption of the switchgear is reduced, which helps to save energy and reduce emissions, and conforms to the development trend of green environmental protection.

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

[0052] By reducing arc and overheating phenomena, the risks of fire and explosion are decreased, and the safety of industrial power systems is improved.

[0053] The energy-saving high-voltage switchgear cabinet has remarkable technical effects in aspects such as improving the power transmission efficiency, extending the equipment life, optimizing the system stability, saving energy and reducing consumption, intelligent management, real-time monitoring and rapid response, reducing maintenance costs, and improving safety. Description of the Drawings

[0054] Figure 1 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 is a schematic diagram of the partial sectional structure of an energy-saving high-voltage switchgear cabinet of the present invention;

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

[0057] Description of the Drawings: 1. High-voltage switchgear cabinet body; 21. Surrounding housing; 22. Distributed optical fiber temperature measurement system; 23. Micro-pressure gauge array; 24. Monitoring data analysis and instruction generation module; 241. Memory; 242. Computer; 31. Electromagnetic compensator; 311. Surrounding coil; 312. Driving circuit; 4. Electromagnetic compensation controller; 41. Instruction buffer; 42. Control chip; 100. Busbar. Detailed Embodiment

[0058] The following further describes the present invention in detail with reference to the drawings.

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

[0060] Refer to Figures 1 - 3, Embodiment 1, An energy-saving high-voltage switchgear, comprising 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 around multiple busbars 100 of the high-voltage switchgear body 1 to respectively monitor the temperature and non-contact pressure fluctuations of the multiple busbars 100, predict the resistance changes of the multiple busbars 100 based on the temperature and non-contact pressure fluctuations respectively, set a standard resistance threshold, compare the current resistance value with the standard resistance threshold, set 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 arranged around the multiple busbars 100 to form a compensation magnetic field around the busbars 100. The electromagnetic compensation controller 4 interacts with the multi-modal busbar monitoring unit for the electromagnetic compensation control instruction, and controls the execution actions of the multiple electromagnetic compensators 31 respectively based on the electromagnetic compensation control instruction.

[0061] By real-time monitoring the temperature and non-contact pressure fluctuations of the busbars 100, the resistance changes of the busbars 100 can be accurately predicted, so that electromagnetic compensation can be carried out in time when the resistance increases, reducing the loss during the power transmission process. The heat generation caused by the increase in resistance is reduced, the wear of the busbars 100 and the contact components is decreased, and the service life of the switchgear and its components is extended.

[0062] The active electromagnetic compensation can dynamically adjust the compensation magnetic field, ensure the stability of the busbar 100 contact point resistance, reduce the arcs and faults caused by poor contact, and improve the stability and reliability of the system.

[0063] By reducing the resistance loss, the overall energy consumption of the switchgear is reduced, which helps to save energy and reduce emissions, meeting the development trend of green environmental protection.

[0064] Adopting advanced monitoring technologies and electromagnetic compensation algorithms, the intelligent management of the switchgear is realized, and the automation level of the power system is improved.

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

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

[0067] By reducing the arcs and overheating phenomena, the risks of fire and explosion are reduced, and the safety of the industrial power system is improved.

[0068] The energy-saving high-voltage switchgear has remarkable technical effects in aspects such as improving the efficiency of electric energy transmission, extending the service life of equipment, optimizing system stability, saving energy and reducing consumption, intelligent management, real-time monitoring and rapid response, reducing maintenance costs, and enhancing safety.

[0069] Embodiment 2: The multimodal busbar monitoring unit includes a surrounding housing 21, a distributed optical fiber temperature measurement system 22, a micro-pressure gauge array 23, and a monitoring data analysis and instruction generation module 24. The surrounding housing 21 surrounds the periphery of the busbar 100. Multiple temperature sensor head arrays of the distributed optical fiber temperature measurement system 22 are installed on the inner wall of the surrounding housing 21. Multiple micro-pressure gauges of the micro-pressure gauge array 23 are installed on the inner wall of the surrounding housing 21. The monitoring data analysis and instruction generation module 24 is communicatively connected to the distributed optical fiber temperature measurement system 22 and the micro-pressure gauge array 23 respectively. 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 respectively, and generates an electromagnetic compensation control instruction based on the electromagnetic compensation algorithm. The monitoring data analysis and instruction generation module 24 communicates and exchanges the electromagnetic compensation control instruction with the electromagnetic compensation controller 4.

[0070] Embodiment 3: 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 communicatively connected to the distributed optical fiber temperature measurement system 22 and the micro-pressure gauge array 23 respectively. The computer 242 is communicatively connected to the memory 241. The computer 242 generates an electromagnetic compensation control instruction and is communicatively connected to the electromagnetic compensation controller 4.

[0071] By integrating the distributed optical fiber temperature measurement system 22 and the micro-pressure gauge array 23, it is possible to simultaneously monitor the temperature and non-contact pressure fluctuations of the busbar 100, providing comprehensive busbar status monitoring, which helps to more accurately evaluate the operating conditions of the busbar, provides 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 an electromagnetic compensation control instruction according to the change of the resistance value based on the pre-stored electromagnetic compensation control instruction set, thereby realizing automatic electromagnetic compensation control.

[0072] Embodiment 4: The electromagnetic compensator 31 includes multiple surrounding coils 311 and a drive circuit 312. The multiple surrounding coils 311 are respectively installed around the inner wall of the housing 21. The electromagnetic compensation controller 4 controls the execution actions of the multiple surrounding coils 311 respectively through the drive circuit 312.

[0073] Through the layout of multiple surrounding coils 311, precise electromagnetic compensation can be carried out for specific parts of the busbar 100, effectively reducing the variation of contact resistance and improving the accuracy of compensation. Each surrounding coil 311 has a corresponding drive circuit 312, enabling the electromagnetic compensation to be carried out distributively, and personalized compensation for different segments of different busbars, enhancing the flexibility of compensation.

[0074] The electromagnetic compensation controller 4 can adjust the drive circuit 312 in real time according to the electromagnetic compensation control instruction, achieving a fast response to the surrounding coil 311, thereby compensating for the change of the busbar 100 resistance in real time and maintaining the stable performance of the busbar. By reducing the busbar contact resistance, the power transmission loss is reduced, the power transmission efficiency is improved, which helps to save energy. The heat generated due to the resistance change is reduced, the wear of the busbar and contact components is decreased, and the service life of the switchgear and its components is extended.

[0075] Electromagnetic compensation helps to reduce arc and overheating phenomena, improves the operating stability of the switchgear, and reduces the probability of faults.

[0076] Through the beneficial technical effects in aspects such as precise compensation, distributed control, real-time adjustment, improving transmission efficiency, extending equipment life, enhancing 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] Embodiment 5, the electromagnetic compensation controller 4 includes an instruction buffer 41 and a control chip 42. The instruction buffer 41 is communicatively connected to the computer 242 to interact with the electromagnetic compensation control instruction, and the control chip 42 is communicatively connected to the instruction buffer 41 and controls the execution actions of multiple electromagnetic compensators 31 respectively.

[0078] Embodiment 6, an energy-saving control method for an energy-saving high-voltage switchgear, used to control the energy consumption of an energy-saving high-voltage switchgear, includes the following steps:

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

[0080] Step 2, the computer 242 predicts the change of the 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 it is determined in Step 3 that the resistance increase threshold is exceeded, the computer 242 generates an electromagnetic compensation control instruction based on the electromagnetic compensation algorithm;

[0083] Step 5: The electromagnetic compensation controller 4 controls the operation of the electromagnetic compensator 31 according to the generated compensation current command.

[0084] In Embodiment 7, in Step 2, the formula for predicting the change in the busbar resistance 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; and ΔP(t) is the pressure change at time t.

[0087] In Embodiment 8, in Step 3, the calculation formula for 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 of the busbar 100, 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, then go to Step 4; where ΔR_threshold is the resistance increase threshold.

[0091] In Embodiment 9, the algorithm formula for generating the electromagnetic compensation control command 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 change rate of the compensation current.

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

[0097] The high-voltage switchgear in a certain power system is responsible for distributing high-voltage electrical energy to different areas. Due to long-term operation, the contact resistance of the busbar gradually increases, resulting in increased energy consumption and shortened equipment life. An energy-saving high-voltage switchgear is adopted.

[0098] Installation of monitoring unit:

[0099] Install a multi-modal busbar monitoring unit around multiple busbars 100 of the high-voltage switchgear, including an enclosing housing 21, a distributed optical fiber temperature measurement system 22, and a micro-pressure gauge array 23;

[0100] The sensor head array of the distributed optical fiber temperature measurement system 22 and the micro-pressure gauge array 23 are installed on the inner wall of the enclosing housing 21;

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

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

[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(t0 - R_threshold;

[0107] ΔR(t0 is the difference between the resistance value at time t and the standard resistance threshold, R_pred(t0 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, go to step 4 to generate an electromagnetic compensation control instruction; where 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, and L is the inductance of the electromagnetic coil, is the change rate of the compensation current.

[0113] 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 multiple electromagnetic compensators 31 through the instruction buffer 41 and the control chip 42.

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

[0116] Through the above implementation steps, the energy-saving high-voltage switchgear can monitor the busbar status in real time, dynamically perform electromagnetic compensation according to the resistance change, thereby reducing the busbar contact resistance, reducing the power transmission loss, reducing the busbar heating, extending the service life of the equipment, improving the operation stability and reliability of the switchgear, realizing the intelligent management of the switchgear, and enhancing the automation level of the power system.

[0117] Ensure the accuracy and reliability of the monitoring unit, and perform calibration 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 according to the plan to ensure its long-term stable operation.

[0120] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. An energy-saving high-voltage switchgear, characterized in that: It includes the high-voltage switchgear body (1), a multimodal busbar monitoring unit, and an active electromagnetic compensation unit. The multimodal busbar monitoring unit is installed around multiple busbars (100) of the high-voltage switchgear 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, it respectively predicts the resistance changes of the multiple busbars (100), sets a standard resistance threshold, compares the current resistance value with the standard resistance threshold, 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 arranged around the multiple busbars (100) to form a compensation magnetic field around the busbars (100). The electromagnetic compensation controller (4) interacts with the multimodal busbar monitoring unit for the electromagnetic compensation control instruction, and respectively controls the execution actions of the multiple electromagnetic compensators (31) based on the electromagnetic compensation control instruction.

2. The energy-saving high-voltage switchgear according to claim 1, characterized in that: The multimodal busbar monitoring unit includes a surrounding housing (21), a distributed optical fiber temperature measurement system (22), a micro-pressure gauge array (23), and a monitoring data analysis and instruction generation module (24). The surrounding housing (21) surrounds the busbar (100). Multiple temperature sensor head arrays of the distributed optical fiber temperature measurement system (22) are installed on the inner wall of the surrounding housing (21). Multiple micro-pressure gauge arrays of the micro-pressure gauge array (23) are installed on the inner wall of the surrounding housing (21). The monitoring data analysis and instruction generation module (24) is respectively communicatively connected to the distributed optical fiber temperature measurement system (22) and the micro-pressure gauge array (23). The monitoring data analysis and instruction generation module (24) respectively predicts the resistance changes of the multiple busbars (100) based on the temperature and non-contact pressure fluctuations, and generates an electromagnetic compensation control instruction based on the electromagnetic compensation algorithm. The monitoring data analysis and instruction generation module (24) communicatively interacts with the electromagnetic compensation controller (4) for the electromagnetic compensation control instruction.

3. An 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 communicatively connected to the distributed optical fiber temperature measurement system (22) and the micro-pressure gauge array (23). The computer (242) is communicatively connected to the memory (241). The computer (242) generates an electromagnetic compensation control instruction and is communicatively connected to the electromagnetic compensation controller (4).

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

5. An 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 communicatively connected to the computer (242) to interact electromagnetic compensation control instructions, and the control chip (42) is communicatively connected to the instruction buffer (41) and controls the execution actions of multiple electromagnetic compensators (31) respectively.

6. An energy-saving control method for an energy-saving high-voltage switchgear, characterized in that: To control the energy consumption of an energy-saving high-voltage switchgear cabinet as claimed in claim 5, the following steps are included: Step 1: The distributed optical fiber temperature measurement system (22) collects the temperature data of the busbar (100), and the micro-pressure gauge array (23) collects the 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 it is determined in Step 3 that the resistance increase threshold is exceeded, the computer (242) generates an electromagnetic compensation control instruction based on the electromagnetic compensation algorithm. Step 5: The electromagnetic compensation controller (4) controls the actions of the electromagnetic compensators (31) according to the generated compensation current instruction.

7. The energy-saving control method of an energy-saving high-voltage switchgear according to claim 6, characterized in that: In Step 2, the formula for predicting the change of the busbar resistance is: R_pred(t) = R0 + kT·ΔT(t) + kP·ΔP(t); 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.

8. The energy-saving control method of an energy-saving high-voltage switch cabinet 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, then go to Step 4; where ΔR_threshold is the resistance increase threshold.

9. The energy-saving control method of an energy-saving high-voltage switch cabinet according to claim 8, characterized in that: The algorithm formula for generating the electromagnetic compensation control instruction 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, and L is the inductance of the electromagnetic coil, is the rate of change of the compensation current.

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