Time-phased power insurance supply analysis method and system

Abstract

The invention relates to the technical field of power supply insurance, in particular to a time-phased power supply insurance analysis method and system, and the method comprises the following steps: S1, voltage stability analysis; s2, voltage load analysis; s3, line aging analysis; s4, carrying out line overload analysis; s5, analyzing the reliability of the line; s6, analyzing the state of the power generation equipment; s7, analyzing the influence of the conveying process; s8, analyzing the supply insurance capability of the supply end; according to the method, the voltage fluctuation degree, the voltage load balance degree, the aging influence degree and the overload influence degree of the power transmission line in each time period are analyzed to obtain the stability coefficient of the power transmission line in each time period, and the power generation capacity parameter of the supply end and the influence degree of weather in each time period on the power system are analyzed to obtain the power supply reliability of the power transmission line. Therefore, the power supply protection reliability degree index of the power system in each time period is obtained through comprehensive analysis and is fed back, the power supply reliability is improved, and the safe and stable operation of the power system is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply security, and in particular to a time-divided power supply security analysis method and system. Background Art

[0002] Power supply security refers to an important task that ensures the stability and reliability of power supply and normal electricity use for users through scientific planning, reasonable scheduling and effective management in the power system. With the continuous acceleration of industrialization and urbanization, the demand for electricity has increased sharply, and the work of power supply security has become particularly important.

[0003] The core of power supply security is to meet users' demand for electricity and ensure the continuity and safety of power supply from the power grid. In modern power systems, due to the continuous growth of power demand and the complexity of the power system, the balance between power supply and demand has become more difficult, especially in the face of extreme weather, emergencies and other situations. Therefore, it is necessary to formulate scientific power supply security strategies and response measures to cope with various possible challenges.

[0004] The patent name is a technical solution published by a Chinese patent, "A multi-time scale power supply analysis method and system" (patent number 202211505185.2). This solution collects load parameters, performs load characteristic analysis and new energy characteristic analysis, and obtains preliminary typical day simulation analysis results. Based on the preliminary results, typical day simulation calculations are performed to obtain daily power supply results, ensuring that the system is not short of power. If there is a power gap, monthly power balance calculations are performed to formulate seasonal power supply plans. According to the demand characteristics of different seasons and time periods, power resources can be reasonably allocated, which improves the flexibility and adaptability of power supply. However, there are still some shortcomings, which are specifically manifested in the following aspects: 1. The solution mainly focuses on the analysis of voltage loads and lacks a comprehensive analysis of transmission lines. This may lead to the neglect of potential risks such as line aging and line overload, resulting in unstable power supply, load imbalance and other problems during system operation, affecting the system's operating efficiency and planning capabilities, and affecting the quality of power supply.

[0005] Second, the plan does not mention an analysis of the reliability of supply guarantees on the supply side, which may result in the system failing to respond promptly to problems on the power supply side, leading to a decrease in the operating efficiency of the entire power system and affecting the quality and stability of power supply. Summary of the Invention

[0006] In view of this, in order to solve the problems raised in the above background technology, a time-divided power supply analysis method and system are proposed.

[0007] The technical solution adopted by the present invention to solve its technical problems is: First, the present invention provides a time-based power supply analysis method, comprising the following steps: S1. Voltage stability analysis: Based on the voltage analysis of the transmission line at each time point in each time period, the voltage fluctuation degree of the transmission line in each time period is obtained.

[0008] S2. Voltage load analysis: Based on the voltage load analysis of the transmission line in each time period, the voltage load balance degree of the transmission line in each time period is obtained.

[0009] S3. Line aging analysis: Obtain the usage time of the transmission line in each time period, and combine the temperature and vibration number of the transmission line in each time period to analyze the degree of aging impact of the transmission line in each time period.

[0010] S4. Line overload analysis: Compare the transmission power of the transmission line in each time period with the rated capacity of the transmission line to determine whether the transmission line is overloaded and analyze the degree of overload impact of the transmission line in each time period.

[0011] S5. Line reliability analysis: The stability coefficient of the transmission line in each period is obtained by analyzing the voltage fluctuation degree, voltage load balance degree, aging impact degree, and overload impact degree of the transmission line in each period. m , where m represents the number of the mth time period, m = 1, 2, ..., q.

[0012] S6. Power generation equipment status analysis: Detect the status data of the supply side and analyze it to obtain the power generation capacity coefficient of the supply side. The status data includes the output power and maximum load of each power generation equipment under various loads.

[0013] S7. Transmission Process Impact Analysis: Detect weather impact parameters at each time point during power transmission on the supply side, and analyze the degree of weather impact on the power system during each time period. Weather impact parameters include temperature, humidity, and wind speed.

[0014] S8. Supply side supply guarantee capability analysis: Based on the supply side power generation capacity coefficient and the degree of weather impact on the power system in each period, the supply side supply guarantee capability index ψ for each period is obtained. m .

[0015] S9. Power supply reliability analysis: Based on the transmission line stability coefficient and the supply capacity index of the supply side in each time period, the power system supply reliability index of each time period is obtained, and it is compared with the preset supply reliability index threshold to obtain the power system supply reliability and provide feedback.

[0016] Preferably, the specific analysis method of the voltage stability analysis is: divide the monitoring period according to the set time length, record it as each period, and take several time points at equal time intervals in each period, and read the voltage of the transmission line at each time point in each period through a voltmeter, record it as V mi , where m represents the number of the mth period, m=1,2,...,q, i represents the number of the i-th time point, i=1,2,...,n, and the average voltage of the transmission line in each period is obtained by averaging the voltage of the transmission line at each time point in each period, which is recorded as Substitute it into the formula Get the voltage fluctuation degree α of the transmission line in each period m , where n represents the number of time points.

[0017] Preferably, the specific analysis method of the voltage load analysis is: reading the voltage V of the transmission line at each time point in each period mi At the same time, the current of the transmission line at each time point in each period is read from the ammeter and recorded as I mi , through the formula Get the voltage load R of the transmission line in each period m , n represents the number of time points, and the average voltage load of the transmission line in each period is obtained by averaging the voltage load of the transmission line, which is recorded as Substitute it into the formula Get the voltage load balancing degree β of the transmission line in each period m .

[0018] Preferably, the specific analysis process of the line aging analysis is as follows: read the service life of the transmission line from the management database, recorded as L0, and obtain the length of time the transmission line has been used in each period, recorded as L m , the temperature and vibration times of the transmission line in each period are detected, and are recorded as T m , Z m By taking the average value of the temperature and vibration times of the transmission line in each period, the average temperature and average vibration times of the transmission line are obtained, which are recorded as Substitute it into the formula Get the aging impact degree of the transmission line in each period γ m , where ο1, ο2, and ο3 represent the weight factors of service life, temperature, and vibration number, respectively.

[0019] Preferably, the specific analysis method of the line overload analysis is: reading the voltage V of the transmission line at each time point in each period respectively mi , current I mi , through the formula The transmission power Pm of the transmission line in each period is obtained, where η1 represents the set transmission line power factor, n represents the number of time points, and the rated transmission power of the preset transmission line is extracted from the management database and recorded as P max , through the formula ΔP m =P max -P m The transmission power difference of the transmission line in each period is obtained. If the transmission power difference of the transmission line in a certain period is less than 0, it means that the transmission line is in an overloaded state during this period, and the overload impact degree of the transmission line in this period is recorded as 1. If the transmission power difference of the transmission line in a certain period is greater than or equal to 0, it means that the transmission line is not in an overloaded state during this period, and the overload impact degree of the transmission line in this period is recorded as 0. The overload impact degree of the transmission line in each period is calculated and recorded as λ m .

[0020] Preferably, the specific analysis method of the line reliability analysis is: reading the voltage fluctuation degree α of the transmission line in each period respectively m , voltage load balance degree β m , aging impact γ m , Overload impact degree λ m , substitute it into the formula

[0021] Get the transmission line stability coefficient χ of each period m , where φ1, φ2, φ3, and φ4 represent the weight factors of the set voltage fluctuation degree, voltage load balance degree, aging impact degree, and overload impact degree, respectively, and φ1+φ2+φ3+φ4=1, and e represents a natural constant.

[0022] Preferably, the specific analysis process of the power generation equipment status analysis is as follows: the first step is to connect the variable load device to the output port of each power generation equipment on the supply side, and detect the current and voltage of each power generation equipment under each load on the supply side, which are recorded as V' jx 、I' jx , where j represents the number of the j-th power generation equipment on the supply side, j=1,2,...,k, and x represents the number of the x-th load, x=1,2,...,y, through the formula P' jx =V jx *I jx *η2 obtains the output power P' of each power generation equipment under each load on the supply side jx , where η2 represents the set supply-side power factor.

[0023] The second step is to read the rated output power of the power generation equipment on the supply side from the management database, recorded as P'max, and use the formula Get the output power difference ΔP' of the power generation equipment under each load on the supply sidex , filter out the minimum value of the output power difference of the power generation equipment under each load on the supply side, record its corresponding output power as the maximum output power of the power generation equipment on the supply side, and then record its corresponding load as the maximum load on the supply side, which is recorded as F max .

[0024] The third step is to calculate the output power P' of each power generation equipment under each load on the supply side. jx , the maximum load F on the supply side max Substitute into the formula The power generation capacity coefficient δ of the supply side is obtained, where They represent the weight factors of the set output power and maximum load respectively.

[0025] Preferably, the specific analysis process of the supply side supply guarantee capability analysis is as follows: First, connect to the local meteorological system and read the temperature, humidity, and wind speed at each time point in each period, which is recorded as T mi 、D mi 、v mi , substitute it into the formula Get the impact of weather on the power system in each period ε m , where a1, a2, and a3 represent the weight factors of the set temperature, humidity, and wind speed, respectively, and n represents the number of time points.

[0026] The second step is to read the power generation capacity coefficient δ of the supply side and the impact of weather on the power system ε in each period. m , substitute it into the formula Get the supply guarantee capability index ψ of the supply side in each period m , where η4 represents the correction factor of the supply guarantee capability index.

[0027] Preferably, the specific analysis process of the power supply reliability analysis is as follows: Step 1, read the transmission line stability coefficient χ m , Supply-side supply security index ψ m , through the formula Get the power supply reliability index of the power system in each period Where w1 and w2 represent the weight factors of the set transmission line stability coefficient and power supply capability index respectively.

[0028] The second step is to compare the power system's supply reliability index in each time period with the preset power system's supply reliability index threshold. If the power system's supply reliability index in a certain time period is greater than or equal to the preset power system's supply reliability index threshold, it means that the power system's supply reliability in that time period is qualified; otherwise, it means that it is unqualified, and feedback is given.

[0029] In a second aspect, the present invention also provides a time-based power supply analysis system, including: a voltage stability detection and analysis module for detecting the voltage of the transmission line at each time point in each time period, and then analyzing the voltage fluctuation degree of the transmission line in each time period.

[0030] The voltage load detection and analysis module is used to obtain the voltage load of the transmission line in each period based on the voltage and current of the transmission line at each time point in each period, and then obtain the voltage load balance degree of the transmission line in each period.

[0031] The line aging analysis module is used to obtain the usage time of the transmission line in each time period, and combine the temperature and vibration number of the transmission line in each time period to analyze the aging impact of the transmission line in each time period.

[0032] The line overload analysis module is used to analyze the transmission power of the transmission line in each period and compare it with the rated capacity of the transmission line to determine whether the transmission line is overloaded and analyze the degree of overload impact of the transmission line in each period.

[0033] The line reliability analysis module is used to obtain the transmission line stability coefficient of each period based on the comprehensive analysis of the voltage fluctuation degree, voltage load balance degree, aging impact degree and overload impact degree of the transmission line in each period.

[0034] The power generation equipment status detection module detects the status data of the supply side and analyzes it to obtain the power generation capacity coefficient of the supply side. The status data includes the output power and maximum load of each power generation equipment under various loads.

[0035] The transmission process impact detection module is used to detect the weather impact parameters at each time point during power transmission on the supply side, and analyze the impact of weather on the power system in each time period. The weather impact parameters include temperature, humidity, and wind speed.

[0036] The supply-side supply guarantee capacity analysis module is used to obtain the supply-side supply guarantee capacity coefficient of each time period based on the supply-side power generation capacity coefficient and the impact of weather on the power system in each time period.

[0037] The power supply reliability analysis module is used to obtain the power supply reliability index of the power system in each time period based on the transmission line stability coefficient and the supply capacity coefficient of the supply side in each time period, and then compare it with the preset power supply reliability index threshold to obtain the power system's power supply reliability and feed it back to the system.

[0038] Management database for storing rated voltage load of transmission lines and rated capacity of each power generation equipment on the supply side.

[0039] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects: First, the present invention obtains the voltage fluctuation degree of the transmission line in each time period based on the voltage analysis of the transmission line at each time point in each time period, and obtains the voltage load balance degree of the transmission line in each time period based on the voltage load analysis of the transmission line in each time period, thereby performing intelligent scheduling and improving the operating efficiency and stability of the power grid.

[0040] 2. The present invention obtains the degree of aging impact of the transmission line in each period based on the service life, temperature, and number of vibrations of the transmission line in each period, and obtains the degree of overload impact of the transmission line in each period based on the transmission power of the transmission line in each period. Potential problems can be identified in advance and corresponding measures can be taken to reduce the risk of accidents.

[0041] 3. The present invention obtains the stability coefficient of the transmission line in each time period by analyzing the voltage fluctuation degree, voltage load balance degree, aging impact degree, and overload impact degree of the transmission line in each time period. According to the stability coefficient of the transmission line in different time periods, the operating status of the power system can be intelligently controlled, the power distribution can be optimized, and the stability and operating efficiency of the power system can be improved.

[0042] 4. The present invention obtains the power generation capacity coefficient of the supply side based on the status data analysis of the supply side, obtains the degree of influence of the weather on the power system in each period based on the weather impact parameters at each time point in each period when the supply side transmits electricity, and then obtains the supply guarantee capacity coefficient of the supply side in each period through comprehensive analysis. It can quantitatively evaluate the power supply guarantee capability of the power system, timely discover potential risks and respond to them, and ensure the reliability of power supply in emergency situations.

[0043] 5. The present invention obtains the power supply reliability index of the power system in each time period based on the transmission line stability coefficient and the supply capacity coefficient of the supply side in each time period, and then analyzes the power supply reliability of the power system and provides feedback, thereby improving power supply reliability and ensuring the safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative effort.

[0045] Figure 1 Schematic diagram of the method of the present invention.

[0046] Figure 2 This is a system module connection diagram of the present invention. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] See also Figure 1 As shown, the first aspect of the present invention provides a time-divided power supply analysis method, comprising the following steps: S1. Voltage stability analysis: obtaining the voltage fluctuation degree of the transmission line in each time period based on the voltage analysis of the transmission line at each time point in each time period.

[0049] The specific analysis method of the voltage stability analysis is as follows: the monitoring period is divided into each period according to the set time length, and a number of time points are taken at equal time intervals within each period, and the voltage of the transmission line at each time point in each period is read by a voltmeter, which is recorded as V mi , where m represents the number of the mth period, m=1,2,...,q, i represents the number of the i-th time point, i=1,2,...,n, and the average voltage of the transmission line in each period is obtained by averaging the voltage of the transmission line at each time point in each period, which is recorded as Substitute it into the formula Get the voltage fluctuation degree α of the transmission line in each period m , where n represents the number of time points; it can monitor power operation in real time and detect voltage anomalies or faults in a timely manner, helping to quickly locate problems and take effective measures to repair them, reducing the risk of power outages.

[0050] S2. Voltage load analysis: Based on the voltage load analysis of the transmission line in each time period, the voltage load balance degree of the transmission line in each time period is obtained.

[0051] The specific analysis method of the voltage load analysis is: reading the voltage V of the transmission line at each time point in each period mi At the same time, the current of the transmission line at each time point in each period is read from the ammeter and recorded as I mi , through the formula Get the voltage load R of the transmission line in each period m , n represents the number of time points, and the average voltage load of the transmission line in each period is obtained by averaging the voltage load of the transmission line, which is recorded as Substitute it into the formula Get the voltage load balancing degree β of the transmission line in each period mBy calculating the voltage load balance of the transmission lines in each time period, the load balance of the power grid at different time points can be evaluated, which helps to discover load imbalance problems, take measures to balance the load, and improve energy utilization efficiency.

[0052] S3. Line aging analysis: Obtain the usage time of the transmission line in each time period, and combine the temperature and vibration number of the transmission line in each time period to analyze the degree of aging impact of the transmission line in each time period.

[0053] The specific analysis method of the line aging analysis is as follows: read the service life of the transmission line from the management database, recorded as L0, and obtain the length of time the transmission line has been used in each period, recorded as L m , the temperature and vibration times of the transmission line in each period are detected, and are recorded as T m , Z m By taking the average value of the temperature and vibration times of the transmission line in each period, the average temperature and average vibration times of the transmission line are obtained, which are recorded as Substitute it into the formula Get the aging impact degree of the transmission line in each period γ m , where o1, o2, and o3 represent the weighting factors of service life, temperature, and vibration number, respectively; by monitoring the degree of aging impact of the transmission line in each period, it is possible to warn of possible aging failures, carry out timely inspections and replacements, reduce the failure rate, and improve the reliability and stability of the transmission line.

[0054] It should be noted that, in one embodiment, ο1 can be set to 0.4, ο2 can be set to 0.3, and ο3 can be set to 0.3. The service life refers to the life that the equipment can achieve under normal working conditions. For transmission lines, the length of the service life directly affects the degree of line aging, so the weight corresponding to the service life is relatively large, and temperature is one of the important factors affecting the aging of transmission lines. High temperature will accelerate the aging rate of insulating materials in the line. The number of vibrations refers to the external vibration impact on the transmission line. Long-term vibration will cause fatigue damage to the material in the line and accelerate aging. Compared with the service life, the influence of temperature and vibration number on aging is relatively small, so the corresponding weight is relatively low.

[0055] S4. Line overload analysis: Compare the transmission power of the transmission line in each time period with the rated capacity of the transmission line to determine whether the transmission line is overloaded and analyze the degree of overload impact of the transmission line in each time period.

[0056] The specific analysis method of the line overload analysis is: read the voltage V of the transmission line at each time point in each period respectively mi , current I mi , through the formula The transmission power Pm of the transmission line in each period is obtained, where η1 represents the set transmission line power factor, n represents the number of time points, and the rated transmission power of the preset transmission line is extracted from the management database and recorded as P max , through the formula ΔP m =P max -P m The transmission power difference of the transmission line in each period is obtained. If the transmission power difference of the transmission line in a certain period is less than 0, it means that the transmission line is in an overloaded state during this period, and the overload impact degree of the transmission line in this period is recorded as 1. If the transmission power difference of the transmission line in a certain period is greater than or equal to 0, it means that the transmission line is not in an overloaded state during this period, and the overload impact degree of the transmission line in this period is recorded as 0. The overload impact degree of the transmission line in each period is calculated and recorded as λ m By calculating the transmission power difference, it is possible to determine which periods of time the transmission line is in an overloaded state, and then take measures to deal with it to avoid adverse effects of overload on the power system.

[0057] S5. Line reliability analysis: The stability coefficient of the transmission line in each period is obtained by analyzing the voltage fluctuation degree, voltage load balance degree, aging impact degree, and overload impact degree of the transmission line in each period. m , where m represents the number of the mth time period, m = 1, 2, ..., q.

[0058] The specific analysis method of the line reliability analysis is: read the voltage fluctuation degree α of the transmission line in each period respectively m , voltage load balance degree β m , aging impact γ m , Overload impact degree λ m , substitute it into the formula

[0059] Get the transmission line stability coefficient χ of each period m , where φ1, φ2, φ3, and φ4 represent the weighting factors of the set voltage fluctuation degree, voltage load balance degree, aging impact degree, and overload impact degree, respectively, and φ1+φ2+φ3+φ4=1, and e represents a natural constant. By comprehensively analyzing the transmission line stability coefficient in each time period, we can have a more comprehensive understanding of the stability state of the transmission line, so that targeted measures can be taken to improve the management efficiency and operation stability of the line.

[0060] It should be noted that, in one embodiment, φ1 can be set to 0.3, φ2 can be set to 0.3, φ3 can be set to 0.2, and φ4 can be set to 0.2. Voltage fluctuations will directly affect the safe operation of the equipment and the stability of the power grid, and the degree of voltage load balance reflects the load distribution between various parts of the system, which is very important for maintaining the normal operation of the system and extending the life of the equipment. Therefore, the weights corresponding to the voltage fluctuation degree and the voltage load balance degree are slightly higher.

[0061] S6. Power generation equipment status analysis: Detect the status data of the supply side and analyze it to obtain the power generation capacity coefficient of the supply side. The status data includes the output power and maximum load of each power generation equipment under various loads.

[0062] The specific analysis process of the power generation equipment status analysis is as follows: First, connect the variable load device to the output port of each power generation equipment on the supply side, and detect the current and voltage of each power generation equipment under each load on the supply side, which are recorded as V' jx 、I' jx , where j represents the number of the j-th power generation equipment on the supply side, j=1,2,...,k, and x represents the number of the x-th load, x=1,2,...,y, through the formula P' jx =V jx *I jx *η2 obtains the output power P' of each power generation equipment under each load on the supply side jx , where η2 represents the set supply-side power factor; real-time detection of output power can promptly detect problems such as abnormal operation of power generation equipment or overload, so as to respond in advance, avoid failure or damage, and ensure the normal operation of the power system.

[0063] The second step is to read the rated output power of the power generation equipment on the supply side from the management database, recorded as P'max, and use the formula Get the output power difference ΔP' of the power generation equipment under each load on the supply side x , filter out the minimum value of the output power difference of the power generation equipment under each load on the supply side, record its corresponding output power as the maximum output power of the power generation equipment on the supply side, and then record its corresponding load as the maximum load on the supply side, which is recorded as F max By identifying the maximum load, we can better understand the load situation of the power system, make targeted optimization and adjustments, ensure the normal operation of the maximum load point and its corresponding power generation equipment, and avoid problems caused by overload operation.

[0064] The third step is to calculate the output power P' of each power generation equipment under each load on the supply side. jx , the maximum load F on the supply side max Substitute into the formula The power generation capacity coefficient δ of the supply side is obtained, where They represent the weight factors of the set output power and maximum load respectively; by calculating the supply-side power generation capacity parameters, we can better evaluate the power supply capacity of the power supply system, discover potential problems in a timely manner and take corresponding countermeasures to ensure the reliability and continuity of power supply.

[0065] It should be noted that, in one embodiment, It can be set to 0.5, It can be set to 0.5. Output power is a core indicator of the generator set, which directly affects the power generation efficiency and the power supply capacity of the power generation system. The maximum load is the maximum load capacity that the power generation system can withstand. It reflects the capacity and carrying capacity of the system. It is of great significance to ensure the stable operation of the system and respond to sudden load changes. Therefore, the weights corresponding to output power and maximum load are equal.

[0066] S7. Transmission Process Impact Analysis: Detect weather impact parameters at each time point during power transmission on the supply side, and analyze the degree of weather impact on the power system during each time period. Weather impact parameters include temperature, humidity, and wind speed.

[0067] S8. Supply side supply guarantee capability analysis: Based on the supply side power generation capacity coefficient and the degree of weather impact on the power system in each period, the supply side supply guarantee capability index ψ for each period is obtained. m .

[0068] The specific analysis process of the supply side supply guarantee capability analysis is as follows: First, connect to the local meteorological system and read the temperature, humidity, and wind speed at each time point in each period, denoted as T mi 、D mi 、v mi , substitute it into the formula Get the impact of weather on the power system in each period ε m , where a1, a2, and a3 represent the weighting factors of the set temperature, humidity, and wind speed, respectively, and n represents the number of time points. By analyzing the impact of weather on the power system in each period, we can more accurately predict the impact of future meteorological conditions on the power system, and formulate targeted power generation plans and resource allocation plans to ensure the stable operation and power supply quality of the power system under different weather conditions.

[0069] It should be noted that, in one embodiment, a1 can be set to 0.4, a2 can be set to 0.3, and a3 can be set to 0.3. Temperature has a direct impact on the heat dissipation, insulation performance and load capacity of electrical equipment. High temperature will cause the equipment to overheat, affecting operating efficiency and lifespan. Low temperature will affect the normal operation of the equipment. Therefore, the weight corresponding to temperature is slightly higher.

[0070] The second step is to read the power generation capacity coefficient δ of the supply side and the impact of weather on the power system ε in each period. m , substitute it into the formula Get the supply guarantee capability index ψ of the supply side in each period m , where η4 represents the correction factor of the supply guarantee capability index; by analyzing the supply guarantee capability coefficient of the supply side in each time period, the supply guarantee capability level of the supply side under different meteorological conditions can be quantified, the power supply capacity of the power supply system can be fully understood, and the reliability and stability of the power supply system can be evaluated.

[0071] S9. Power supply reliability analysis: Based on the transmission line stability coefficient and the supply capacity coefficient of the supply side in each time period, the power system supply reliability index for each time period is obtained, and compared with the preset supply reliability index threshold, the power system supply reliability is obtained and feedback is provided.

[0072] The specific analysis process of the power supply reliability analysis is as follows: Step 1: Read the transmission line stability coefficient χ m , the supply-side supply capacity coefficient ψ m , through the formula Get the power supply reliability index of the power system in each period Among them, w1 and w2 represent the weight factors of the set transmission line stability coefficient and power supply capacity coefficient respectively; according to the power supply reliability index of the power system in each time period, the weak links and risk points of the power system can be discovered in a timely manner, and corresponding prevention and adjustment measures can be formulated in a targeted manner. Through the analysis of the power supply reliability index, it can help optimize resource allocation and improve the power system's ability to respond to emergencies and extreme situations.

[0073] It should be noted that, in one embodiment, w1 can be set to 0.5, and w2 can be set to 0.5. The transmission line stability coefficient directly reflects the stability and reliability of the transmission line under various conditions, and has an important impact on the power supply stability and reliability of the power system. The supply-side supply capacity coefficient reflects the backup and emergency power supply capabilities of the power supply end, which is crucial for ensuring the power supply reliability of the power system and responding to emergencies. Therefore, the weights corresponding to the transmission line stability coefficient and the supply-side supply capacity coefficient are equal.

[0074] The second step is to compare the power system's supply reliability index in each time period with the preset power system's supply reliability index threshold. If the power system's supply reliability index in a certain time period is greater than or equal to the preset power system's supply reliability index threshold, it means that the power system's supply reliability in that time period is qualified; otherwise, it means that it is unqualified, and feedback is provided. By providing timely feedback on these problem time periods and areas, managers can quickly locate the problems, strengthen monitoring and regulation, and ensure the stable operation of the power system.

[0075] See Figure 2 As shown, the second aspect of the present invention provides an intelligent control system for power consumption of a vacuum circuit breaker, including a voltage stability detection and analysis module, a voltage load detection and analysis module, a line aging analysis module, a line overload analysis module, a line reliability analysis module, a power generation equipment status detection module, a transmission process impact detection module, a supply-side supply guarantee capability analysis module, a power supply reliability analysis module, and a management database.

[0076] The management database is connected to the voltage load detection and analysis module, the line overload analysis module, the line reliability analysis module, the power supply reliability analysis module, the supply-side supply capability analysis module, and the transmission process impact detection module; the line reliability analysis module is connected to the voltage stability detection and analysis module, the voltage load detection and analysis module, the line overload analysis module, the circuit aging analysis module, and the power supply reliability analysis module; the supply-side supply capability analysis module is connected to the power supply reliability analysis module, the power generation equipment status detection module, and the transmission process impact detection module.

[0077] The voltage stability detection and analysis module is used to detect the voltage of the transmission line at each time point in each period, and then analyze the voltage fluctuation degree of the transmission line in each period.

[0078] The voltage load detection and analysis module is used to obtain the voltage load of the transmission line in each period based on the voltage and current of the transmission line at each time point in each period, and then obtain the voltage load balance degree of the transmission line in each period.

[0079] The line aging analysis module is used to obtain the usage time of the transmission line in each time period, and combine the temperature and vibration number of the transmission line in each time period to analyze the aging impact of the transmission line in each time period.

[0080] The line overload analysis module is used to analyze the transmission power of the transmission line in each period and compare it with the rated capacity of the transmission line to determine whether the transmission line is overloaded and analyze the degree of overload impact of the transmission line in each period.

[0081] The line reliability analysis module is used to obtain the transmission line stability coefficient of each period based on the comprehensive analysis of the voltage fluctuation degree, voltage load balance degree, aging impact degree and overload impact degree of the transmission line in each period.

[0082] The power generation equipment status detection module detects the status data of the supply side and analyzes it to obtain the power generation capacity coefficient of the supply side. The status data includes the output power and maximum load of each power generation equipment under various loads.

[0083] The transmission process impact detection module is used to detect the weather impact parameters at each time point during power transmission on the supply side, and analyze the impact of weather on the power system in each time period. The weather impact parameters include temperature, humidity, and wind speed.

[0084] The supply-side supply guarantee capacity analysis module is used to obtain the supply-side supply guarantee capacity coefficient of each time period based on the supply-side power generation capacity coefficient and the impact of weather on the power system in each time period.

[0085] The power supply reliability analysis module is used to obtain the power supply reliability index of the power system in each time period based on the transmission line stability coefficient and the supply capacity coefficient of the supply side in each time period, and then compare it with the preset power supply reliability index threshold to obtain the power system's power supply reliability and feed it back to the system.

[0086] Management database for storing rated voltage load of transmission lines and rated capacity of each power generation equipment on the supply side.

[0087] The present invention obtains the transmission line stability coefficient for each time period by analyzing the voltage fluctuation degree, voltage load balance degree, aging impact degree, and overload impact degree of the transmission line in each time period. Based on the analysis of the power generation capacity coefficient of the supply side and the impact of the weather on the power system in each time period, the supply guarantee capacity coefficient of the supply side for each time period is obtained. Then, a comprehensive analysis is conducted to obtain the supply reliability index of the power system in each time period and provide feedback, thereby improving the power supply reliability and ensuring the safe and stable operation of the power system.

[0088] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the scope of protection of the present invention.

Claims

1. A time-divided power supply analysis method, characterized in that: The steps include: S1. Voltage stability analysis: Analyze the voltage of the transmission line at each time point in each period to determine the voltage fluctuation level of the transmission line in each period; S2. Voltage load analysis: Analyze the voltage load of the transmission line at each time period to determine the voltage load balance of the transmission line at each time period. S3. Line aging analysis: Obtain the length of time the transmission line has been in use in each period, and combine it with the temperature and vibration frequency of the transmission line in each period to analyze the degree of aging impact of the transmission line in each period; S4. Line overload analysis: Compare the transmission power of the transmission line at each time period with the rated capacity of the transmission line to determine whether the transmission line is overloaded and analyze the degree of overload impact of the transmission line at each time period; S5. Line reliability analysis: The stability coefficient of the transmission line in each period is obtained by analyzing the voltage fluctuation degree, voltage load balance degree, aging impact degree, and overload impact degree of the transmission line in each period. m , where m represents the number of the mth period, m = 1, 2, ..., q; S6. Power Generation Equipment Status Analysis: Detect and analyze the supply-side status data to determine the supply-side power generation capacity coefficient. The status data includes the output power and maximum load of each power generation equipment under various loads. S7. Transmission Process Impact Analysis: Detect weather impact parameters at each time point during power transmission at the supply end, and analyze the degree of weather impact on the power system during each time period. Weather impact parameters include temperature, humidity, and wind speed. S8. Supply side supply guarantee capability analysis: Based on the supply side power generation capacity coefficient and the degree of weather impact on the power system in each period, the supply side supply guarantee capability index ψ for each period is obtained. m ; S9. Power supply reliability analysis: Based on the transmission line stability coefficient and the supply capacity index of the supply side in each time period, the power system supply reliability index of each time period is obtained, and it is compared with the preset supply reliability index threshold to obtain the power system supply reliability and provide feedback.

2. The time-divided power supply analysis method according to claim 1 is characterized in that: The specific analysis method of the voltage stability analysis is: The monitoring period is divided into each period according to the set time, and several time points are taken at equal time intervals in each period. The voltage of the transmission line at each time point in each period is read by a voltmeter and recorded as V mi , where m represents the number of the mth period, m=1,2,...,q, i represents the number of the i-th time point, i=1,2,...,n, and the average voltage of the transmission line in each period is obtained by averaging the voltage of the transmission line at each time point in each period, which is recorded as Substitute it into the formula Get the voltage fluctuation degree α of the transmission line in each period m , where n represents the number of time points.

3. The time-divided power supply analysis method according to claim 2 is characterized in that: The specific analysis method of the voltage load analysis is: Read the voltage V of the transmission line at each time point in each period mi At the same time, the current of the transmission line at each time point in each period is read from the ammeter and recorded as I mi , through the formula Get the voltage load R of the transmission line in each period m , n represents the number of time points, and the average voltage load of the transmission line in each period is obtained by averaging the voltage load of the transmission line, which is recorded as Substitute it into the formula Get the voltage load balancing degree β of the transmission line in each period m .

4. The time-divided power supply analysis method according to claim 3 is characterized by: The specific analysis method of the line aging analysis is: Read the service life of the transmission line from the management database, recorded as L0, and obtain the length of time the transmission line has been used in each period, recorded as L m , the temperature and vibration times of the transmission line in each period are detected, and are recorded as T m , Z m By taking the average value of the temperature and vibration times of the transmission line in each period, the average temperature and average vibration times of the transmission line are obtained, which are recorded as Substitute it into the formula Get the aging impact degree of the transmission line in each period γ m , where ο1, ο2, and ο3 represent the weight factors of service life, temperature, and vibration number, respectively.

5. The time-divided power supply analysis method according to claim 4 is characterized in that: The specific analysis method of the line overload analysis is: Read the voltage V of the transmission line at each time point in each period respectively mi Current I mi By formula The transmission power Pm of the transmission line in each period is obtained, where η1 represents the set transmission line power factor, n represents the number of time points, and the rated transmission power of the preset transmission line is extracted from the management database and recorded as P max , through the formula ΔP m =P max -P m The transmission power difference of the transmission line in each period is obtained. If the transmission power difference of the transmission line in a certain period is less than 0, it means that the transmission line is in an overloaded state during this period, and the overload impact degree of the transmission line in this period is recorded as 1. If the transmission power difference of the transmission line in a certain period is greater than or equal to 0, it means that the transmission line is not in an overloaded state during this period, and the overload impact degree of the transmission line in this period is recorded as 0. The overload impact degree of the transmission line in each period is calculated and recorded as λ m .

6. The time-divided power supply analysis method according to claim 5 is characterized by: The specific analysis method of the line reliability analysis is as follows: Read the voltage fluctuation degree α of the transmission line in each period respectively m , voltage load balance degree β m , aging impact γ m , Overload impact degree λ m , substitute it into the formula Get the transmission line stability coefficient χ of each period m , where φ1, φ2, φ3, and φ4 represent the weight factors of the set voltage fluctuation degree, voltage load balance degree, aging impact degree, and overload impact degree, respectively, and φ1+φ2+φ3+φ4=1, and e represents a natural constant.

7. The time-divided power supply analysis method according to claim 1 is characterized in that: The specific analysis process of the power generation equipment status analysis is as follows: The first step is to connect the variable load device to the output port of each power generation equipment on the supply side, and detect the current and voltage of each power generation equipment under each load on the supply side, which are recorded as V' jx 、I' jx , where j represents the number of the j-th power generation equipment on the supply side, j=1,2,...,k, and x represents the number of the x-th load, x=1,2,...,y, through the formula P' jx =V jx *I jx *η2 obtains the output power P' of each power generation equipment under each load on the supply side jx , where η2 represents the set supply-side power factor; The second step is to read the rated output power of the power generation equipment on the supply side from the management database, denoted as P'max, and use the formula Get the output power difference ΔP' of the power generation equipment under each load on the supply side x , filter out the minimum value of the output power difference of the power generation equipment under each load on the supply side, record its corresponding output power as the maximum output power of the power generation equipment on the supply side, and then record its corresponding load as the maximum load on the supply side, recorded as F max ; The third step is to calculate the output power P' of each power generation equipment under each load on the supply side. jx , the maximum load F on the supply side max Substitute into the formula The power generation capacity coefficient δ of the supply side is obtained, where They represent the weight factors of the set output power and maximum load respectively.

8. The time-divided power supply analysis method according to claim 7 is characterized by: The specific analysis process of the supply-side supply guarantee capability analysis is as follows: The first step is to connect to the local meteorological system and read the temperature, humidity, and wind speed at each time point in each period, which is recorded as T mi 、D mi 、v mi , substitute it into the formula Get the impact of weather on the power system in each period ε m , where a1, a2, and a3 represent the weight factors of the set temperature, humidity, and wind speed, respectively, and n represents the number of time points; The second step is to read the power generation capacity coefficient δ of the supply side and the impact of weather on the power system ε in each period. m , substitute it into the formula Get the supply guarantee capability index ψ of the supply side in each period m , where η4 represents the correction factor of the supply guarantee capability index.

9. The time-divided power supply analysis method according to claim 1 is characterized by: The specific analysis process of the power supply reliability analysis is as follows: The first step is to read the transmission line stability coefficient χ of each period m , Supply-side supply security index ψ m , through the formula Get the power supply reliability index of the power system in each period Where w1 and w2 represent the weight factors of the transmission line stability coefficient and supply guarantee capability index respectively; The second step is to compare the power system's supply reliability index in each time period with the preset power system's supply reliability index threshold. If the power system's supply reliability index in a certain time period is greater than or equal to the preset power system's supply reliability index threshold, it means that the power system's supply reliability in that time period is qualified; otherwise, it means that it is unqualified, and feedback is given.

10. A time-divided power supply analysis system, characterized in that: include: The voltage stability detection and analysis module is used to detect the voltage of the transmission line at each time point in each period, and then analyze the voltage fluctuation degree of the transmission line in each period; The voltage load detection and analysis module is used to obtain the voltage load of the transmission line in each period based on the voltage and current of the transmission line at each time point in each period, and then obtain the voltage load balance degree of the transmission line in each period; The line aging analysis module is used to obtain the usage time of the transmission line in each period, and analyze the temperature and vibration number of the transmission line in each period to obtain the degree of aging impact of the transmission line in each period; The line overload analysis module is used to analyze the transmission power of the transmission line in each period and compare it with the rated capacity of the transmission line to determine whether the transmission line is overloaded and analyze the degree of overload impact of the transmission line in each period; The line reliability analysis module is used to obtain the transmission line stability coefficient in each period based on the comprehensive analysis of the voltage fluctuation degree, voltage load balance degree, aging impact degree, and overload impact degree of the transmission line in each period; The power generation equipment status detection module detects the status data of the supply side and analyzes it to obtain the power generation capacity coefficient of the supply side. The status data includes the output power and maximum load of each power generation equipment under various loads. The transmission process impact detection module is used to detect weather impact parameters at each time point during power transmission at the supply end, and analyze the impact of weather on the power system at each time point. The weather impact parameters include temperature, humidity, and wind speed. The supply-side supply guarantee capability analysis module is used to obtain the supply-side supply guarantee capability index for each period based on the supply-side power generation capacity coefficient and the impact of weather conditions on the power system in each period; The power supply reliability analysis module is used to analyze the power system's supply reliability index for each period based on the transmission line stability coefficient and the supply-side supply capability index for each period. This index is then compared with a preset supply reliability index threshold to obtain the power system's supply reliability and provide feedback to the system. Management database for storing rated voltage load of transmission lines and rated capacity of each power generation equipment on the supply side.

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