A Power System Reliability Calculation Method Based on Grid Topology

Abstract

The invention provides a power grid topology based power system reliability calculation method. The method includes the following steps: determining input data of power grid topology; forming a minimal path set matrix of the power grid topology; outputting a minimum cut set of the power grid topology; and calculating reliability of a power system via the minimum cut set. The power grid topology based power system reliability calculation method has the advantages that in consideration of expanded faults caused by component faults of a disconnector, a busbar and the like, automatic search is performed to form an expanded fault failure table; multiple situations of source / sink, parallel branches and source and sink coincidence can be processed; programs can be configured according to practical situations, and a branch cut set, a node cut set and a branch and node hybrid cut set of the system are solved; and impact on the system due to expanded fault branches can be processed.

Description

technical field [0001] The invention relates to a calculation method, in particular to a power system reliability calculation method based on grid topology. Background technique [0002] Power system reliability is a measure of the power system's ability to supply power and energy to power users uninterruptedly in accordance with acceptable quality standards and required quantities. Including adequacy and safety two aspects. [0003] Reliability calculation requires two key processes: the first is to select the system state and calculate the state probability; the second is to analyze the system problems and corrective measures caused by the selected state. [0004] Generally, the state of the power system is selected by the state enumeration method and the Monte Carlo simulation method; [0005] State enumeration method includes network analysis method and fault state tree analysis method; [0006] The main feature of the network analysis method is that it is simple in c...

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Problems solved by technology

For example attached figure 2 Among them, when the bus 6 fails, in order to isolate the faulty bus, the circuit breakers 3, 16, and 19 connected to the bus must be disconnected, which will inevitably affect the outgoing circuit of the system

[0009] The consequence of the common mode failure of the components is the related failure of the components. This part of the failure has a great impact on the system failure, and even makes the failure amplified. This is not considered in many reliability analysis based on connectivity.

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