Risk-considered urban power network operation security assessment method

Abstract

The invention discloses a risk-considered urban power network operation security assessment method. The risk-considered urban power network operation security assessment method comprises the following steps: analyzing an urban power network operating risk source which is divided into two types, namely a small disturbance risk source including both load fluctuation and distributed power supply output fluctuation, and a fault risk source including both internal network faults and external network faults; as for the two risk sources, respectively building static security risk index models and transient security risk index models to assess the urban power network operating safety level. A traditional deterministic security assessment method only attaches importance to the most serious and credible accidents, so that the result is conservative. A probabilistic assessment method overcomes the defect of the deterministic assessment method, and additionally considers the uncertain factor (probability of occurrence). The risk-considered urban power network operation security assessment method is a modification and improvement of the original probabilistic assessment method and can quantify the accident results.

Description

technical field [0001] The invention relates to a risk-considered urban power grid operation safety evaluation method, which belongs to the field of power system optimization operation. Background technique [0002] Partial faults that occur during the operation of the power grid may induce chain reactions and expand the scope and degree of accidents. The deepening of power market reform makes the operating state of the power grid often close to the limit. Once an accident occurs, it will bring immeasurable losses to the social economy, even endanger personal safety, and cause social unrest. As an important part of the power system, the urban power grid is particularly important to ensure its safe and reliable operation. At present, based on state evaluation, the method of maintaining a healthy operating state through self-healing control has been applied, and the operation safety evaluation of urban power grid is also the core component of the self-healing control system. ...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The technical problem to be solved by the present invention is aimed at the inability to take into account the different impacts of different types of risk sources on the power grid in the background technology, and the failure to account for the different degrees of over-limits of state variables such as voltage and current after accidents. The impact of quantification, calculation, and the fluctuation of distributed power output are not taken into account

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