A Risk Assessment Method for Power Grid Operation Aiming at Bus Fault

Abstract

The invention discloses a power grid operation risk assessment method for bus faults. The power grid operation risk assessment method calculates and analyzes the power grid operation risks caused by bus faults from three levels: normal state, accident state and expected state, and is based on After the bus failure, the power grid equipment over-limit information and power grid load loss information are graded and evaluated according to the weighted fusion method of the exponential function, and the risk evaluation grade division is established according to the scope of the risk evaluation index, and the calculated power grid risk evaluation index F is calculated according to the risk evaluation Risk rating is carried out by grade division, so as to realize the quantitative assessment of the power grid operation risk under the condition of bus failure. The method of the invention can realize all-round disclosure and quantitative evaluation of the operation risk of the power grid under the condition of a bus failure, which is beneficial for operators to optimize the normal operation mode of the power grid bus and improve the risk control target of the bus.

Description

technical field [0001] The invention relates to the technical field of power system intelligent analysis and control, in particular to a power grid operation risk assessment method for bus faults. Background technique [0002] At present, problems such as complex operation mode of the power grid, heavy equipment load, and insufficient power supply capacity are becoming more and more prominent, and the pressure on the safe operation of the power grid has increased significantly. In the actual operation of the power grid, busbar faults account for a small proportion of power system faults. According to statistics, busbar faults account for about 6% to 7% of all line faults in the system. Nevertheless, the busbar voltage loss fault in the busbar fault will have a greater impact on the entire system, and the consequences are very serious, because all the power transmission lines will lose power, causing a large-scale blackout and splitting the power system into several parts. I...

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Problems solved by technology

In particular, man-made accidental touches and misoperations cause busbar protection to malfunction, cut off a large number of power supplies and lines, cause huge losses, and seriously affect important users, and cannot be restored in a short time

[0003] In view of the serious consequences and impacts caused by the above-mentioned bus faults, there is still a lack of quantitative assessment methods for power grid risk in the case of bus faults, and the existing power grid risk assessment technologies generally focus on risk assessment and early warning of equipment or cross-section violations , with less consideration in terms of load loss effects

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