Electric power system protection and control method based on risk assessment

Abstract

The invention discloses an electric power system protection and control method based on a risk assessment. The method comprises the following steps: carrying out the risk assessment on an electric power system, and calculating power network risk values; establishing a protection and control object function; inputting electric power system running states and parameters; and according to the protection and control object function and the power network risk values, formulating electric power system protection and control measures. According to the invention, risk theories are applied to the protection and control of the electric power system, the problem of formulating protection and control measured by reliance on experience of dispatchers is solved, and quantifiable measures can be obtained by use of the method so as to effectively realize safety protection and control of the electric power system. Besides, the method, on the basis of the risk assessment, takes control cost into consideration in an integrated approach, draws up the protection and control object function and formulates the quantifiable protection and control measures according to the object function so as to reduce the control cost as much as possible under the condition that safety protection of the electric power network is realized.

Description

technical field [0001] The invention relates to the technical field of power system safety protection, in particular to a risk assessment-based power system prevention and control method. Background technique [0002] With the regional interconnection and marketization of the power system, the scale of the power grid has become larger and larger, resulting in a wider range of disturbance propagation. Under certain conditions, regional power grids may be affected by nearby power grid failures and cause cascading failures. Such cascading failures often cause large-scale power outages, and even the complete collapse of the power grid. Therefore, effective prevention of power system cascading failures is the key to avoiding large-scale blackouts. Traditionally, deterministic power flow calculation methods are used when studying the static security preventive control of power systems. Since this method cannot fully reflect the operating state of the power system, and the analysi...

AI Technical Summary

Problems solved by technology

Since this method cannot fully reflect the operating state of the power system, and the analysis results are relatively conservative, it is not suitable for the safety protection of power systems that avoid cascading failures after a fault occurs.

At present, the safety protection method to avoid cascading failures is mainly that the dispatcher formulates a preventive control strategy based on experience, which has relatively high technical requirements for the dispatcher, and the preventive control strategy formulated is not objective enough, so the effectiveness of preventive control needs to be improved

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