A method for evaluate transmission line security reliability

A technology of transmission lines and evaluation methods, which is applied in the direction of instruments, data processing applications, resources, etc., can solve problems such as long calculation time, achieve clear calculation goals, better calculation efficiency, and improve the effect of evaluation accuracy

Active Publication Date: 2019-02-22
RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER +1
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Problems solved by technology

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

Method used

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  • A method for evaluate transmission line security reliability
  • A method for evaluate transmission line security reliability
  • A method for evaluate transmission line security reliability

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Embodiment

[0041] Such as 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 ...

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Abstract

The invention provides a transmission line security reliability evaluation method, which comprises the following steps: S1, acquiring the transmission line satisfies N-1, N-2 standard proportions, calculate N-1, N- Pass Rate Score = N-1, N-2 Pass rate* 100; 2, respectively calculate that proportion of the heavy-load line, the proportion of the light-load line, the maximum load rate and the load unbalance degree, and marking the rationality of the power flow distribution according to the difference between the average value of the four indexes of the heavy-load line proportion, the proportion of the light-load line, the maximum load rate and the load unbalance degree and the four indexes; 3, calculating that abundance of the short-circuit current to obtain a rationality score of the short-circuit current; S4: Scoring the variable capacitance load ratio according to the difference between the variable capacitance load ratio and the standard interval; 5, scoring that reliability of electric power use according to the load reduction probability and the expected power supply shortage quantity in a year; S6: Integrating Step S1-S3 socres. The invention realizes the comprehensive evaluation through the combination of safety reliability and electric power 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 power system scale and the large increase of power equipment, the reliability assessment of power system is very important for the safe and stable operation of the whole 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 to solve the ab...

Claims

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Application Information

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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
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