A safety protection device for high and low voltage switch cabinet

Abstract

The present invention relates to the field of electric power monitoring technology, and in particular to a high and low voltage switch cabinet safety protection device, comprising a data receiving module, a primary alarm module, a calculation module, a secondary alarm module and a verification module. The present invention can timely detect and respond to potential equipment failures by real-time monitoring and analyzing key parameters of high and low voltage switch cabinets, thereby improving the reliability and safety of the power system. By setting primary and secondary alarms, the system can distinguish between faults of different levels and take corresponding measures. In addition, by comparing the simulated reaction time of the verification module with the actual alarm reaction time, the system can continuously optimize itself and improve the accuracy and response speed of fault diagnosis. Ultimately, the system helps to reduce power outages caused by equipment failures, reduce maintenance costs, and can improve the overall efficiency of power supply.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power monitoring, and in particular to a safety protection device for a high and low voltage switch cabinet. Background Art

[0002] Driven by the global energy transformation and Industry 4.0, the power system is undergoing unprecedented changes. With the large-scale integration of renewable energy, the development of smart grid technology, and the increasing demand for efficient and environmentally friendly power supply, traditional power equipment monitoring and management methods can no longer meet the complexity and dynamics of modern power grids. In addition, with the application of technologies such as the Internet of Things (IoT), big data analysis, cloud computing, and artificial intelligence, the power industry is gradually becoming digital and intelligent, which provides strong technical support and broad development space for remote monitoring and management of power equipment. Therefore, it is necessary to develop a remote monitoring system that integrates real-time data acquisition, intelligent analysis, fault warning, and automatic response to improve the operation and maintenance efficiency of power equipment, reduce the failure rate, and ensure the stability of the power grid and the continuity of power supply.

[0003] The Chinese patent publication number CN105006887A discloses a system and method for realizing intelligent power distribution remote monitoring, the system includes a power equipment control unit: including an indicator light or display screen that can display the current equipment status, a signal acquisition module for data acquisition of the power distribution system, a control module for sending control data to the power distribution system, a logic processing module for processing input information according to configuration rules, a storage module for storing power equipment configuration information, and a transmission module for interacting with a cloud server through a wired or wireless network; a monitoring client: including a setting module for configuring the power equipment control unit according to the purpose of the equipment, a monitoring module for monitoring the target power equipment, a storage module for storing power equipment configuration information, and a transmission module for interacting with the monitoring client and the cloud server; a cloud server: including a device management module for managing power equipment configuration information, a user account management module for managing according to cloud user accounts, an intelligent algorithm module for analyzing the use of equipment and providing decisions, and a transmission module that provides network transmission and encryption and decryption functions. The data acquisition frequency of the system is not high enough, and the system cannot capture the rapidly changing power parameters, resulting in the inability to discover problems in a timely manner. At the same time, the lack of real-time monitoring and automatic response mechanisms leads to the inability to take correct measures in a timely manner. Summary of the invention

[0004] To this end, the present invention provides a high and low voltage switch cabinet safety protection device to overcome the problems of power supply interruption and equipment damage caused by fault detection and processing delays due to the single real-time monitoring and automatic response mechanism in the prior art.

[0005] To achieve the above object, the present invention provides a high and low voltage switch cabinet safety protection device, comprising:

[0006] A data receiving module is used to receive real-time current, real-time voltage and real-time temperature collected by a number of sensors installed at each high and low voltage switch cabinet;

[0007] A first-level alarm module, which is connected to the data receiving module and is used to issue a first-level alarm when the real-time temperature is greater than a preset standard temperature;

[0008] a calculation module, which is connected to the data receiving module and the first-level alarm module respectively, and is used to calculate the temperature change rate according to a number of real-time temperatures in a preset historical query time period when the alarm module issues a first-level alarm, and to calculate the power fluctuation coefficient according to a number of real-time currents and a number of real-time voltages in the historical query time period when the temperature change rate is greater than a preset standard change rate;

[0009] A secondary alarm module, which is connected to the calculation module, is used to compare the temperature change rate with the preset standard change rate when the power fluctuation coefficient is less than the preset abnormal fluctuation value, so as to determine the internal fault type, and issue a secondary alarm according to the internal fault type, and record the alarm response time between the first alarm and the second alarm;

[0010] a verification module, which is connected to the secondary alarm module and the data receiving module respectively, and is used to send a preset cooling fault signal to the plurality of sensors when the internal fault type is determined to be a cooling system fault, and record the simulated reaction time from when the secondary alarm module receives the cooling fault signal to when the secondary alarm is issued, and output the real-time current, real-time voltage and real-time temperature when the simulated reaction time is greater than the alarm reaction time;

[0011] The verification module adjusts the historical query time period according to the simulation reaction time and the alarm reaction time when the simulation reaction time is less than or equal to the alarm reaction time;

[0012] The cooling fault signal includes a current signal, a voltage signal and a temperature signal.

[0013] Furthermore, the first-level alarm module compares the real-time temperature with the preset standard temperature.

[0014] If the real-time temperature is greater than the preset standard temperature, the first-level alarm module will issue a first-level alarm.

[0015] Furthermore, the calculation module is preset with a historical query time period. When the alarm module issues a first-level alarm, the temperature change rate is calculated using several real-time temperatures received by the data receiving module during the historical query time period, wherein v=(T'-T) / t, v is the temperature change rate, T' is the real-time temperature at the end of the historical query time period, T is the real-time temperature at the beginning of the historical query time period, and t is the historical query time period.

[0016] Furthermore, the calculation module is preset with a standard change speed, and compares the temperature change speed with the standard change speed.

[0017] If the temperature change rate is greater than the standard change rate, the calculation module calculates the average values ​​of the real-time current and real-time voltage in the historical query time period, and calculates the power fluctuation coefficient according to the real-time current and real-time voltage and their corresponding average values, wherein: Where α is the power fluctuation coefficient, Ii is the real-time current at the i-th time point, Vi is the real-time voltage at the i-th time point, I' is the average value of the real-time current during the historical query time period, and V' is the average value of the real-time voltage during the historical query time period.

[0018] Further, the calculation module compares the temperature change rate with the standard change rate;

[0019] If the temperature change rate is less than or equal to the standard change rate, the calculation module controls the alarm module to issue a regular maintenance reminder.

[0020] Furthermore, the secondary alarm module is preset with an abnormal fluctuation value, and compares the power fluctuation coefficient calculated by the calculation module with the abnormal fluctuation value;

[0021] If the power fluctuation coefficient is greater than or equal to the abnormal fluctuation value, the secondary alarm module determines that an external fault exists and issues an external troubleshooting alarm.

[0022] Furthermore, the secondary alarm module is preset with a standard change speed, and when the power fluctuation coefficient is less than the abnormal fluctuation value, the temperature change speed is compared with the standard change speed;

[0023] If the temperature change rate is lower than the standard change rate, the secondary alarm module determines that the internal fault type is an electronic component performance degradation fault.

[0024] Further, the secondary alarm module compares the temperature change rate with the standard change rate;

[0025] If the temperature change rate is greater than or equal to the standard change rate, the secondary alarm module determines that the internal fault type is a cooling system fault, sends a preset cooling fault signal to the multiple sensors, and records the simulated reaction time of the secondary alarm module from when the multiple sensors receive the cooling fault signal to when the secondary alarm is issued.

[0026] Further, the secondary alarm module sends a preset cooling fault signal to the plurality of sensors, and when the secondary alarm module issues a secondary alarm, a simulation reaction time and an alarm reaction time are compared;

[0027] If the simulation reaction time is greater than the alarm reaction time, the secondary alarm module outputs the real-time current, real-time voltage and real-time temperature collected by several sensors at each high and low voltage switch cabinet.

[0028] Further, the secondary alarm module compares the simulation reaction time and the alarm reaction time;

[0029] If the simulation reaction time is less than or equal to the alarm reaction time, the secondary alarm module adjusts the historical query time period according to the simulation reaction time and the alarm reaction time, wherein t'=t×[1+(tj-tm) / tj], t' is the adjusted historical query time period, tj is the alarm reaction time, and tm is the simulation reaction time.

[0030] Compared with the prior art, the beneficial effect of the present invention is that by real-time monitoring and analysis of key parameters of high and low voltage switchgear, potential equipment failures can be discovered and responded to in a timely manner, thereby improving the reliability and safety of the power system. By setting primary and secondary alarms, the system can distinguish between faults of different levels and take corresponding measures. In addition, by comparing the simulated reaction time of the verification module with the actual alarm reaction time, the system can continuously optimize itself and improve the accuracy and response speed of fault diagnosis. Ultimately, the system helps to reduce power outages caused by equipment failures, reduce maintenance costs, and can improve the overall efficiency of power supply.

[0031] Furthermore, firstly, through the real-time temperature monitoring mechanism, it is possible to quickly respond to the potential risk of equipment overheating, thereby preventing equipment damage or failure. Secondly, through timely alarms, it is possible to reduce the downtime of equipment due to overheating and ensure the continuity and reliability of power supply. In addition, the first-level alarm can also serve as a preliminary step in fault diagnosis, providing important information for subsequent fault analysis and processing.

[0032] Furthermore, firstly, by quantifying the temperature change rate, the system is provided with a dynamic indicator for evaluating the change of the thermal state of the equipment, which helps to more accurately identify potential faults or abnormal conditions. Secondly, the calculation results of the temperature change rate can assist the operation and maintenance personnel or the automatic control system to make a faster and more targeted response, such as adjusting the cooling system or taking other preventive measures. Finally, through the analysis of historical data, the operation and maintenance strategy of the equipment can be optimized, the service life of the equipment can be extended, and the long-term operating costs can be reduced.

[0033] Furthermore, by introducing the power fluctuation coefficient, the operating stability of high and low voltage switchgear within a specific time period can be effectively evaluated. If the temperature change rate is abnormal, this may indicate that there are some problems with the equipment, and the calculation of the power fluctuation coefficient provides further analysis to help determine the severity and possible causes of the problem. This method can reveal whether the equipment has affected the quality and stability of power supply due to some faults. By monitoring the power fluctuation coefficient, operation and maintenance personnel can more accurately determine whether emergency measures are needed, such as adjusting equipment operating parameters or performing repairs, thereby avoiding possible large-scale power outages or equipment damage and ensuring the continuity and reliability of power supply.

[0034] Furthermore, scheduled maintenance reminders can help identify and resolve potential problems in advance, thereby avoiding unexpected downtime or performance degradation caused by equipment failure. This approach can reduce the need for emergency repairs, reduce operating costs, and improve equipment reliability and service life. At the same time, scheduled maintenance can also help optimize resource allocation, ensuring that maintenance work is carried out during periods of low equipment load, reducing the impact on power supply.

[0035] Furthermore, firstly, through the preset abnormal fluctuation value, a clear standard is provided for the judgment of external faults, making fault diagnosis faster and more accurate. Secondly, the timely issuance of external troubleshooting alarms helps operation and maintenance personnel to respond quickly, check and deal with possible external problems in a timely manner, and reduce the impact of faults on the stability of the power system. In addition, this data-based judgment mechanism reduces the possibility of human misjudgment and improves the efficiency of fault handling. Finally, through external troubleshooting alarms, it can ensure that the power system can quickly restore stability in the face of external interference, ensuring the continuity and reliability of power supply.

[0036] Furthermore, through the working mechanism of the secondary alarm module, different types of faults can be effectively identified and distinguished. When the temperature change rate is lower than the standard change rate, it usually means that the physical components of the high and low voltage switchgear may be experiencing performance degradation, rather than a failure caused by external factors. This judgment helps operation and maintenance personnel to quickly locate the problem and specifically inspect and replace electronic components with degraded performance. It can reduce unnecessary comprehensive inspections, save time and resources, and improve the efficiency and accuracy of fault handling. In addition, timely detection and replacement of electronic components with degraded performance can help prevent small problems from evolving into larger faults, thereby improving the reliability and stability of the entire power system.

[0037] Furthermore, firstly, by setting a standard change rate and comparing it with the actual measured value, potential problems in the cooling system can be quickly identified, so that measures can be taken in advance to prevent failures. Secondly, sending a preset cooling fault signal and recording the simulated reaction time can help the system evaluate and verify the effectiveness of the fault response process. If the simulated reaction time is within an acceptable range, it means that the system's response is timely; if the simulated reaction time is too long, the fault response process needs to be optimized.

[0038] Furthermore, by comparing the simulation response time and the alarm response time, the timeliness and effectiveness of the fault response system can be ensured. If the simulation response time is long, outputting real-time data can help operation and maintenance personnel quickly understand the current operating status of the high and low voltage switchgear, so as to make more accurate judgments and decisions. This helps to quickly locate the problem and take necessary measures, such as adjusting the cooling system or performing emergency repairs, to prevent the fault from further expanding.

[0039] Furthermore, through the dynamic adjustment mechanism, the secondary alarm module can improve the efficiency of fault detection and response. The adjusted historical query time period is more in line with actual needs, which helps to reduce false positives and false negatives, and ensures that the system only issues alarms when necessary. In addition, the optimized time setting enables the system to more sensitively capture subtle changes in device status, thereby warning of potential faults in advance and providing more time for operation and maintenance personnel to prepare and respond. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structure of the high and low voltage switch cabinet safety protection device;

[0041] Figure 2 The decision logic diagram for the first level alarm decision for this implementation;

[0042] Figure 3 This is the decision logic diagram for the temperature change rate decision of this implementation;

[0043] Figure 4This is the decision logic diagram for implementing the second-level alarm decision. DETAILED DESCRIPTION

[0044] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0046] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0047] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] See also Figure 1 As shown, it is a schematic diagram of the structure of the high and low voltage switch cabinet safety protection device of this embodiment;

[0049] This embodiment provides a high and low voltage switch cabinet safety protection device, including:

[0050] A data receiving module is used to receive real-time current, real-time voltage and real-time temperature collected by a number of sensors installed at each high and low voltage switch cabinet, wherein each high and low voltage switch cabinet corresponds to three sensors, namely a temperature sensor, a current sensor and a voltage sensor;

[0051] A first-level alarm module, connected to the data receiving module, for issuing a first-level alarm when the real-time temperature is greater than a preset standard temperature;

[0052] a calculation module, connected to the data receiving module and the first-level alarm module respectively, for calculating the temperature change rate according to a number of real-time temperatures in a preset historical query time period when the alarm module issues a first-level alarm, and for calculating the power fluctuation coefficient according to a number of real-time currents and a number of real-time voltages in the historical query time period when the temperature change rate is greater than a preset standard change rate;

[0053] A secondary alarm module is connected to the calculation module and is used to compare the temperature change rate with the preset standard change rate when the power fluctuation coefficient is less than the preset abnormal fluctuation value to determine the internal fault type, and issue a secondary alarm according to the internal fault type, and record the alarm response time between the first alarm and the second alarm;

[0054] a verification module, connected to the secondary alarm module and the data receiving module respectively, for sending a preset cooling fault signal to the plurality of sensors when determining that the internal fault type is a cooling system fault, and recording a simulated reaction time from when the secondary alarm module receives the cooling fault signal to when the secondary alarm is issued, and outputting real-time current, real-time voltage and real-time temperature when the simulated reaction time is greater than the alarm reaction time;

[0055] The verification module adjusts the historical query time period according to the simulation reaction time and the alarm reaction time when the simulation reaction time is less than or equal to the alarm reaction time;

[0056] The cooling fault signal includes a current signal, a voltage signal and a temperature signal.

[0057] First, the data receiving module collects the real-time current, voltage and temperature data transmitted by the sensors of each high and low voltage switch cabinet. When the first-level alarm module detects that the real-time temperature exceeds the preset standard temperature, it will issue a first-level alarm. Subsequently, after receiving the first-level alarm, the calculation module will calculate the temperature change rate based on the real-time temperature data in the historical query time period. If the temperature change rate exceeds the preset standard, the calculation module will further analyze the current and voltage data in the same time period to calculate the power fluctuation coefficient. When the power fluctuation coefficient is lower than the abnormal value, the second-level alarm module will compare the temperature change rate with the standard change rate, determine the fault type, and issue the corresponding second-level alarm, while recording the alarm reaction time. When the fault type is a cooling system fault, the verification module will send a cooling fault signal to the sensor and record the simulated reaction time. If the simulated reaction time exceeds the alarm reaction time, the real-time data is output; if the simulated reaction time is within a reasonable range, the historical query time period is adjusted to optimize the alarm system.

[0058] By real-time monitoring and analysis of key parameters of high and low voltage switchgear, potential equipment failures can be discovered and responded to in a timely manner, thereby improving the reliability and safety of the power system. By setting primary and secondary alarms, the system can distinguish between different levels of faults and take appropriate measures. In addition, by comparing the simulated reaction time of the verification module with the actual alarm reaction time, the system can continuously optimize itself and improve the accuracy and response speed of fault diagnosis. Ultimately, the system helps to reduce power outages caused by equipment failures, reduce maintenance costs, and improve the overall efficiency of power supply.

[0059] Among them, the sensors include a temperature sensor, a current sensor and a voltage sensor.

[0060] The preset standard temperature is a set temperature threshold used to determine whether the device is within the normal operating temperature range. If the device temperature exceeds this threshold, the system will consider that there is a risk of overheating. Depending on the operating temperature range recommended by the equipment manufacturer and historical operating data, the typical operating temperature of the transformer is usually set to 60°C to 80°C. In this embodiment, it is set to 70°C. Setting it to 70°C can ensure that the device operates within a safe temperature range and avoid damage or failure of the device caused by overheating.

[0061] The preset historical query time period is the time range used by the system to analyze historical data in order to calculate parameters such as the temperature change rate or power fluctuation coefficient. The selection of this time period will affect the system's sensitivity to changes in device status. It depends on the normal operation cycle of the device and the average time interval between failures. It is usually set to 1 hour to 24 hours. In this embodiment, it is set to 3 hours. The 3-hour time window can capture short-term anomalies in device operation, while preventing the alarm system from being overly sensitive due to too frequent data.

[0062] The preset standard change rate is a set temperature change rate threshold, which is used to evaluate whether the device temperature change is within the normal range. If the temperature change rate exceeds this threshold, it may indicate that there is a problem with the device. It depends on the temperature change rate of the device under normal operation and slight abnormal conditions. It is usually set to a temperature change of no more than 1°C per minute. In this embodiment, it is set to 0.5°C per minute.

[0063] Tighter standards change rates can detect potential equipment problems earlier and improve failure prevention capabilities.

[0064] The preset abnormal fluctuation value is a threshold value of a power fluctuation coefficient, which is used to evaluate whether the power supply is stable. If the power fluctuation coefficient is lower than this threshold, it may indicate that there is a fault in the high and low voltage switchgear, depending on the current and voltage fluctuation range of the equipment under normal operation and known fault conditions. It is usually set to a voltage fluctuation of no more than ±5% and a current fluctuation of no more than ±10%. In this embodiment, it is set to a voltage fluctuation of ±3% and a current fluctuation of ±8%. A stricter fluctuation value can reduce false alarms while ensuring a quick response to real abnormal situations.

[0065] The preset cooling fault signal is a specific signal combination that the system will send when a possible fault in the cooling system is detected. It is used to simulate a cooling system fault and test the system's responsiveness. This signal usually includes changes in current, voltage, and temperature. Depending on the response time and fault recovery time of the cooling system, it is usually set to a combination signal containing a current signal drop, a voltage signal drop, and a temperature signal increase. In this embodiment, it is set to a current signal drop of 10%, a voltage signal drop of 5%, and a temperature signal increase of 2°C. Through a specific signal combination, it is possible to more accurately simulate a cooling system fault and test the system's responsiveness.

[0066] Please continue reading Figure 2 As shown, it is a decision logic diagram for the first-level alarm decision of this implementation;

[0067] Specifically, the first-level alarm module compares the real-time temperature with the preset standard temperature.

[0068] If the real-time temperature is greater than the preset standard temperature, the first-level alarm module will issue a first-level alarm.

[0069] The main function of the first-level alarm module is to monitor the real-time temperature of the high and low voltage switchgear during operation. It continuously receives real-time temperature data from the data receiving module and compares it with the preset standard temperature. If the monitored real-time temperature exceeds this preset value, the first-level alarm module will be triggered and a first-level alarm signal will be issued. This alarm signal can be a sound, light or a warning message sent through a communication network. The purpose is to immediately notify the operation and maintenance personnel or the control system that the equipment may be experiencing an overheating condition.

[0070] First, through the real-time temperature monitoring mechanism, it can quickly respond to the potential risk of equipment overheating, thereby preventing equipment damage or failure. Second, through timely alarms, it can reduce the downtime of equipment due to overheating and ensure the continuity and reliability of power supply. In addition, the first-level alarm can also serve as a preliminary step in fault diagnosis, providing important information for subsequent fault analysis and processing.

[0071] Specifically, the calculation module is preset with a historical query time period. When the alarm module issues a first-level alarm, the temperature change rate is calculated using several real-time temperatures received by the data receiving module during the historical query time period, wherein v = (T'-T) / t, v is the temperature change rate, T' is the real-time temperature at the end of the historical query time period, T is the real-time temperature at the beginning of the historical query time period, and t is the historical query time period.

[0072] The calculation module is activated after the primary alarm module sounds an alarm. Its role is to analyze the real-time temperature data collected by the data receiving module during the preset historical query time period. The calculation module determines the temperature change rate based on a formula. In this way, the calculation module is able to quantify the rate of increase or decrease of temperature within a specific time period, providing key information for further analysis.

[0073] First, by quantifying the rate of temperature change, the system is provided with a dynamic indicator for evaluating changes in the thermal state of the equipment, which helps to more accurately identify potential failures or abnormal conditions. Second, the calculation results of the temperature change rate can assist operation and maintenance personnel or automatic control systems to make faster and more targeted responses, such as adjusting the cooling system or taking other preventive measures. Finally, through the analysis of historical data, the operation and maintenance strategies of the equipment can be optimized, the service life of the equipment can be extended, and the long-term operating costs can be reduced.

[0074] Specifically, the calculation module is preset with a standard change speed, and compares the temperature change speed with the standard change speed.

[0075] If the temperature change rate is greater than the standard change rate, the calculation module calculates the average values ​​of the real-time current and real-time voltage in the historical query time period, and calculates the power fluctuation coefficient according to the real-time current and real-time voltage and their corresponding average values, wherein: Where α is the power fluctuation coefficient, Ii is the real-time current at the i-th time point, Vi is the real-time voltage at the i-th time point, I' is the average value of the real-time current during the historical query time period, and V' is the average value of the real-time voltage during the historical query time period.

[0076] After receiving a Level 1 alarm, the calculation module first calculates the temperature change rate based on the real-time temperature data during the historical query period. If this rate exceeds the preset standard change rate, the calculation module further analyzes the real-time current and voltage data during the same period. The calculation module calculates the average of these data and uses the real-time current and real-time voltage and their respective averages to calculate the power fluctuation coefficient. This coefficient quantifies the stability of the power supply by comparing the deviation between the real-time data and the average data.

[0077] By introducing the power fluctuation coefficient, the operating stability of high and low voltage switchgear within a specific time period can be effectively evaluated. If the temperature change rate is abnormal, this may indicate that there are some problems with the equipment, and the calculation of the power fluctuation coefficient provides further analysis to help determine the severity and possible causes of the problem. This method can reveal whether the equipment has affected the quality and stability of power supply due to certain faults. By monitoring the power fluctuation coefficient, operation and maintenance personnel can more accurately determine whether emergency measures need to be taken, such as adjusting equipment operating parameters or performing repairs, thereby avoiding possible large-scale power outages or equipment damage and ensuring the continuity and reliability of power supply.

[0078] Please continue reading Figure 3 As shown, it is a determination logic diagram for determining the temperature change rate in this embodiment;

[0079] Specifically, the calculation module compares the temperature change rate with the standard change rate.

[0080] If the temperature change rate is less than or equal to the standard change rate, the calculation module controls the alarm module to issue a regular maintenance reminder.

[0081] When the temperature change rate monitored by the calculation module is less than or equal to the preset standard change rate, it indicates that the temperature change of the high and low voltage switch cabinets is within the normal range and there is no abnormal rapid temperature rise. In this case, the calculation module will not trigger further alarms, but will send instructions to the alarm module, which will issue a regular maintenance reminder.

[0082] Regular maintenance reminders help to detect and resolve potential problems in advance, thus avoiding unexpected downtime or performance degradation caused by equipment failure. This approach can reduce the need for emergency repairs, reduce operating costs, and improve equipment reliability and service life. At the same time, regular maintenance can also help optimize resource allocation, ensuring that maintenance work is carried out during periods of low equipment load, reducing the impact on power supply.

[0083] Please continue reading Figure 4 As shown, it is a decision logic diagram for implementing the second-level alarm decision;

[0084] Specifically, the secondary alarm module is preset with an abnormal fluctuation value, and compares the power fluctuation coefficient calculated by the calculation module with the abnormal fluctuation value.

[0085] If the power fluctuation coefficient is greater than or equal to the abnormal fluctuation value, the secondary alarm module determines that an external fault exists and issues an external troubleshooting alarm.

[0086] After receiving the data provided by the calculation module, the secondary alarm module will compare the calculated power fluctuation coefficient with the preset abnormal fluctuation value. When the power fluctuation coefficient reaches or exceeds this abnormal fluctuation value, the secondary alarm module will determine that there is an external fault, that is, the power supply problem may be caused by external factors such as power grid fluctuations, load mutations, etc. Subsequently, the secondary alarm module will issue an external investigation alarm to notify the operation and maintenance personnel or the control system to check and handle it.

[0087] First, the preset abnormal fluctuation value provides a clear standard for the judgment of external faults, making fault diagnosis faster and more accurate. Second, the timely issuance of external troubleshooting alarms helps operation and maintenance personnel respond quickly, check and deal with possible external problems in a timely manner, and reduce the impact of faults on the stability of the power system. In addition, this data-based judgment mechanism reduces the possibility of human misjudgment and improves the efficiency of fault handling. Finally, through external troubleshooting alarms, it can ensure that the power system can quickly restore stability in the face of external interference, ensuring the continuity and reliability of power supply.

[0088] Specifically, the secondary alarm module is preset with a standard change speed. When the power fluctuation coefficient is less than the abnormal fluctuation value, the temperature change speed is compared with the standard change speed.

[0089] If the temperature change rate is lower than the standard change rate, the secondary alarm module determines that the internal fault type is an electronic component performance degradation fault.

[0090] After receiving the power fluctuation coefficient provided by the calculation module, the secondary alarm module will compare it with the preset abnormal fluctuation value. If the power fluctuation coefficient is lower than the abnormal fluctuation value, it means that the fluctuation of power supply is within the acceptable range. At this time, the secondary alarm module will further analyze the temperature change rate. If the temperature change rate provided by the calculation module is lower than the preset standard change rate, the secondary alarm module will determine the fault type as electronic component performance degradation fault based on this data and the preset fault judgment logic, and issue a corresponding alarm.

[0091] Through the working mechanism of the secondary alarm module, different types of faults can be effectively identified and distinguished. When the temperature change rate is lower than the standard change rate, it usually means that the physical components of the high and low voltage switchgear may be experiencing performance degradation, rather than a failure caused by external factors. This judgment helps operation and maintenance personnel to quickly locate the problem and specifically inspect and replace electronic components with degraded performance. It can reduce unnecessary comprehensive inspections, save time and resources, and improve the efficiency and accuracy of fault handling. In addition, timely detection and replacement of electronic components with degraded performance can help prevent small problems from evolving into larger faults, thereby improving the reliability and stability of the entire power system.

[0092] Specifically, the secondary alarm module compares the temperature change rate with the standard change rate.

[0093] If the temperature change rate is greater than or equal to the standard change rate, the secondary alarm module determines that the internal fault type is a cooling system fault, sends a preset cooling fault signal to the multiple sensors, and records the simulated reaction time of the secondary alarm module from when the multiple sensors receive the cooling fault signal to when the secondary alarm is issued.

[0094] When performing fault diagnosis, the secondary alarm module compares the temperature change rate provided by the calculation module with the preset standard change rate. If the temperature change rate is detected to be greater than or equal to this standard value, the secondary alarm module will determine that there may be a fault in the cooling system. At this time, the secondary alarm module will send a preset cooling fault signal to the connected sensor, and then monitor and record the time from the sensor receiving the fault signal to the actual issuance of the secondary alarm. This time is called the simulated reaction time.

[0095] First, by setting a standard change rate and comparing it with the actual measurement value, potential problems in the cooling system can be quickly identified, so that measures can be taken in advance to prevent failures. Second, sending a preset cooling fault signal and recording the simulated reaction time can help the system evaluate and verify the effectiveness of the fault response process. If the simulated reaction time is within an acceptable range, it means that the system responds in a timely manner; if the simulated reaction time is too long, the fault response process needs to be optimized.

[0096] Specifically, the secondary alarm module sends a preset cooling fault signal to the plurality of sensors. When the secondary alarm module issues a secondary alarm, the simulation reaction time and the alarm reaction time are compared.

[0097] If the simulation reaction time is greater than the alarm reaction time, the secondary alarm module outputs the real-time current, real-time voltage and real-time temperature collected by several sensors at each high and low voltage switch cabinet.

[0098] When the secondary alarm module detects that the temperature change rate is greater than or equal to the standard change rate and determines that it is a cooling system failure, it will send a preset cooling fault signal to the sensor. Subsequently, the secondary alarm module will enter a monitoring phase to record the actual time from the sensor receiving the cooling fault signal to the issuance of the secondary alarm, that is, the simulated reaction time. Once the secondary alarm is triggered, the module will compare the simulated reaction time with the alarm reaction time, that is, the actual time from the detection of the fault to the issuance of the alarm. If the simulated reaction time exceeds the alarm reaction time, it indicates that the sensor or system has a delay in responding to the fault. The secondary alarm module will output the real-time current, voltage and temperature data collected by the sensors at each high and low voltage switch cabinet.

[0099] By comparing the simulation reaction time and the alarm reaction time, the timeliness and effectiveness of the fault response system can be ensured. If the simulation reaction time is long, outputting real-time data can help operation and maintenance personnel quickly understand the current operating status of the high and low voltage switchgear, so as to make more accurate judgments and decisions. This helps to quickly locate the problem and take necessary measures, such as adjusting the cooling system or performing emergency repairs, to prevent the fault from further expanding.

[0100] Specifically, the secondary alarm module compares the simulated reaction time and the alarm reaction time.

[0101] If the simulation reaction time is less than or equal to the alarm reaction time, the secondary alarm module adjusts the historical query time period according to the simulation reaction time and the alarm reaction time, wherein t'=t×[1+(tj-tm) / tj], t' is the adjusted historical query time period, tj is the alarm reaction time, and tm is the simulation reaction time.

[0102] When the secondary alarm module completes the simulation test of the cooling system failure, it compares the simulated reaction time with the actual alarm reaction time. If the simulated reaction time is less than or equal to the alarm reaction time, the secondary alarm module determines that the current historical query time period is set too conservatively and there is room for optimization. To this end, the historical query time period needs to be adjusted.

[0103] Through a dynamic adjustment mechanism, the secondary alarm module can improve the efficiency of fault detection and response. The adjusted historical query time period is more in line with actual needs, which helps to reduce false positives and false negatives, and ensures that the system only issues alarms when necessary. In addition, the optimized time setting enables the system to more sensitively capture small changes in device status, thereby warning of potential faults in advance and providing more time for operation and maintenance personnel to prepare and respond.

[0104] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high and low voltage switch cabinet safety protection device, characterized in that: include: A data receiving module is used to receive real-time current, real-time voltage and real-time temperature collected by a number of sensors installed at each high and low voltage switch cabinet; A first-level alarm module, which is connected to the data receiving module and is used to issue a first-level alarm when the real-time temperature is greater than a preset standard temperature; a calculation module, which is connected to the data receiving module and the first-level alarm module respectively, and is used to calculate the temperature change rate according to a number of real-time temperatures in a preset historical query time period when the alarm module issues a first-level alarm, and to calculate the power fluctuation coefficient according to a number of real-time currents and a number of real-time voltages in the historical query time period when the temperature change rate is greater than a preset standard change rate; A secondary alarm module, which is connected to the calculation module, is used to compare the temperature change rate with the preset standard change rate when the power fluctuation coefficient is less than the preset abnormal fluctuation value, so as to determine the internal fault type, and issue a secondary alarm according to the internal fault type, and record the alarm response time between the first alarm and the second alarm; a verification module, which is connected to the secondary alarm module and the data receiving module respectively, and is used to send a preset cooling fault signal to the plurality of sensors when the internal fault type is determined to be a cooling system fault, and record the simulated reaction time from when the secondary alarm module receives the cooling fault signal to when the secondary alarm is issued, and output the real-time current, real-time voltage and real-time temperature when the simulated reaction time is greater than the alarm reaction time; The verification module adjusts the historical query time period according to the simulation reaction time and the alarm reaction time when the simulation reaction time is less than or equal to the alarm reaction time; The cooling fault signal includes a current signal, a voltage signal and a temperature signal.

2. The high and low voltage switch cabinet safety protection device according to claim 1 is characterized in that: The first-level alarm module compares the real-time temperature with the preset standard temperature. If the real-time temperature is greater than the preset standard temperature, the first-level alarm module will issue a first-level alarm.

3. The high and low voltage switch cabinet safety protection device according to claim 2 is characterized in that: The calculation module is preset with a historical query time period. When the alarm module issues a first-level alarm, the temperature change rate is calculated using several real-time temperatures received by the data receiving module within the historical query time period, wherein v=(T'-T) / t, v is the temperature change rate, T' is the real-time temperature at the end of the historical query time period, T is the real-time temperature at the beginning of the historical query time period, and t is the historical query time period.

4. The high and low voltage switch cabinet safety protection device according to claim 3 is characterized in that: The calculation module is preset with a standard change speed, and compares the temperature change speed with the standard change speed. If the temperature change rate is greater than the standard change rate, the calculation module calculates the average values ​​of the real-time current and real-time voltage in the historical query time period, and calculates the power fluctuation coefficient according to the real-time current and real-time voltage and their corresponding average values, wherein: Where α is the power fluctuation coefficient, Ii is the real-time current at the i-th time point, Vi is the real-time voltage at the i-th time point, I' is the average value of the real-time current during the historical query time period, and V' is the average value of the real-time voltage during the historical query time period.

5. The high and low voltage switch cabinet safety protection device according to claim 4 is characterized in that: The calculation module compares the temperature change rate with the standard change rate; If the temperature change rate is less than or equal to the standard change rate, the calculation module controls the alarm module to issue a regular maintenance reminder.

6. The high and low voltage switch cabinet safety protection device according to claim 5 is characterized in that: The secondary alarm module is preset with an abnormal fluctuation value, and compares the power fluctuation coefficient calculated by the calculation module with the abnormal fluctuation value; If the power fluctuation coefficient is greater than or equal to the abnormal fluctuation value, the secondary alarm module determines that an external fault exists and issues an external troubleshooting alarm.

7. The high and low voltage switch cabinet safety protection device according to claim 6 is characterized in that: The secondary alarm module is preset with a standard change speed, and when the power fluctuation coefficient is less than the abnormal fluctuation value, the temperature change speed is compared with the standard change speed; If the temperature change rate is lower than the standard change rate, the secondary alarm module determines that the internal fault type is an electronic component performance degradation fault.

8. The high and low voltage switch cabinet safety protection device according to claim 7 is characterized in that: The secondary alarm module compares the temperature change rate with the standard change rate; If the temperature change rate is greater than or equal to the standard change rate, the secondary alarm module determines that the internal fault type is a cooling system fault, sends a preset cooling fault signal to the multiple sensors, and records the simulated reaction time of the secondary alarm module from when the multiple sensors receive the cooling fault signal to when the secondary alarm is issued.

9. The high and low voltage switch cabinet safety protection device according to claim 8 is characterized in that: The secondary alarm module sends a preset cooling fault signal to the plurality of sensors, and when the secondary alarm module issues a secondary alarm, compares the simulation reaction time with the alarm reaction time; If the simulation reaction time is greater than the alarm reaction time, the secondary alarm module outputs the real-time current, real-time voltage and real-time temperature collected by several sensors at each high and low voltage switch cabinet.

10. The high and low voltage switch cabinet safety protection device according to claim 9 is characterized in that: The secondary alarm module compares the simulation reaction time and the alarm reaction time; If the simulation reaction time is less than or equal to the alarm reaction time, the secondary alarm module adjusts the historical query time period according to the simulation reaction time and the alarm reaction time, wherein t'=t×[1+(tj-tm) / tj], t' is the adjusted historical query time period, tj is the alarm reaction time, and tm is the simulation reaction time.

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