A Method for Evaluating the Safety and Reliability of Transmission Lines
A technology of transmission lines and evaluation methods, applied in data processing applications, instruments, calculations, etc., can solve problems such as long calculation time, achieve clear calculation goals, better calculation efficiency, and improve the accuracy of evaluation
Active Publication Date: 2021-07-30
RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER +1
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However, the main disadvantage of traditional Monte Carlo calculation is that calculation accuracy is closely related to calculation efficiency, that is, to obtain high-precision calculation results, longer calculation time is required
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[0041] like figure 1 As shown, the application provides a method for evaluating the safety and reliability of transmission lines, the method comprising:
[0042] S1, obtain the ratio of the transmission lines meeting the N-1 and N-2 standards, and calculate the N-1 and N-2 pass rate score=N-1 and N-2 pass rate*100.
[0043] This indicator is used to evaluate the proportion of a certain transmission line that meets the N-1 and N-2 standards, and to verify whether the power grid structure strength and operation mode meet the requirements for safe operation, reflecting the safety of power grid power supply and resistance to large-scale power outages Ability. Transmission lines satisfying N-1 and N-2 are defined as: when any (two) components (transmission lines, transformers, etc.) in the power grid fail, the power grid can still maintain safe and stable operation by operating switches, etc. Other components in the circuit will not be overloaded. Therefore, the pass rate of N-1...
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The present invention provides a method for evaluating the safety and reliability of power transmission lines, the method comprising: S1, obtaining the ratio of power transmission lines meeting the N-1 and N-2 standards, and calculating the N-1 and N-2 pass rate scores=N-2 1. N-2 pass rate * 100; S2: Calculate the proportion of heavy-loaded lines, light-loaded lines, maximum load rate, and load imbalance respectively. According to the proportion of heavy-loaded lines, light-loaded lines, maximum Score the rationality of the power flow distribution by the difference between the average value of the 4 indicators of the balance degree and the 4 indicators; S3: calculate the short-circuit current adequacy to obtain the short-circuit current rationality score; Score the variable load ratio; S5: Score power reliability based on the load reduction probability and annual expected power shortage; S6: Combine the scoring items in steps S1‑S5 and add them up to get the total reliability score. The present invention realizes comprehensive evaluation through the combination of safety reliability and power utilization reliability.
Description
technical field [0001] The invention mainly relates to related fields such as power system operation analysis and reliability evaluation, and specifically relates to a method for evaluating the safety and reliability of a power transmission line. Background technique [0002] With the continuous expansion of the scale of the power system and the large increase of power equipment, the reliability assessment of the power system is very important for the safe and stable operation of the entire power system. [0003] The current system reliability assessment mostly adopts the Monte Carlo simulation method, and it is more flexible to apply this method to the reliability assessment of large power grids. However, the main disadvantage of traditional Monte Carlo calculation is that calculation accuracy is closely related to calculation efficiency, that is, longer calculation time is required to obtain high-precision calculation results. Contents of the invention [0004] In order...
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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q50/06
Inventor 田鑫李雪亮吴健李琨曾军赵龙高晓楠王艳郑志杰张杰牟宏汪湲高效海张丽娜张玉跃付一木魏鑫袁振华孙东磊牟颖刘冬张栋梁张家宁王男
Owner RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER