A Safety Evaluation System of Power System Based on Risk Theory

Abstract

The invention relates to an electric power system safety assessment system based on a risk theory; the electric power system safety assessment system comprises a power grid topology structure parameter input module, a history statistics element outage failure rate input module, a system state selection module, a load flow calculation module, a fault accident result severity calculation module and a risk assessment module; the electric power system safety assessment system can effectively solve the disadvantages of a conventional assessment method, fully considers fault accident happen probability and result severity, thus more reasonably and fully describing the electric power system risk conditions; the system introduces a risk taking type utility function in the economics field to quantitatively describe the fault accident result severity, thus preventing shielding phenomenon caused by using a linearity severity function, i.e., the sum of limit crossing values of a plurality of small elements is bigger than a severe element limit crossing value, thus more accurately reflecting the relative severe level.

Description

Technical field[0001]The invention belongs to the field of power system risk assessment, and specifically relates to a power system safety assessment system based on risk theory.Background technique[0002]At present, China’s power system is gradually developing into a super-large-scale complex system, which is manifested in super-large-scale capacity, wide-area distribution in space, and large-scale disturbance propagation. This rapid development has achieved huge economic and social benefits at the same time. , It also bears greater risks, and brings severe challenges to the stable operation and control of the power system. Once an accident occurs, it will cause more serious consequences. Therefore, a fast and accurate safety assessment helps to fully understand the risks of the power system. And to prevent and evade is of great significance to the safe operation of the power system, planning and decision-making, etc.[0003]However, the traditional evaluation method only starts from ...

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Problems solved by technology

[0003] However, the traditional evaluation method only starts from the probability of component failure and outage, ignoring the measurement of the severity of the consequences of component outage on the power system. However, the existence of such components in the power system shows that the failure probability is low, Once a failure occurs, it will cause serious consequences to the system, so the risk index should be a comprehensive reflection of probability and consequences, that is, it can not only reflect the possibility of failure accidents, but also reflect the severity of failure accidents, so traditional evaluation methods are difficult to comprehensive , Reasonably and accurately assess the risk situation of the power system

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