Topological subnetting method of electromagnetic transient simulation containing switching characteristic circuit

Abstract

The invention relates to a topological subnetting method, in particular to a topological subnetting method of electromagnetic transient simulation containing a switching characteristic circuit. The method comprises the following steps that A, a target electric system is divided into two parts including a switching subnetwork and an electromagnetic subnetwork; B, the switching subnetwork and the electromagnetic subnetwork are respectively calculated in one electromagnetic step; C, the switching subnetwork and the electromagnetic subnetwork carry out data exchange; and D, next step electromagnetic transient calculation is carried out on the switching subnetwork and the electromagnetic subnetwork. The method has the advantages that an electric electronic switching network is designed into an independent electromagnetic network, the network scale is small, during the off-line/real-time switching calculation, only the subnetwork is subjected to iteration or interpolation calculation, other parts of the network do not participate in the iteration or interpolation calculation, the program modification on the electromagnetic network is reduced to the minimum, only few element models relevant to the electric electronic switch are modified, the switching calculation precision can also be ensured to the greatest degree, and in addition, the workload of the electromagnetic transient program parallelization calculation modification is favorably reduced.

Description

technical field [0001] The invention relates to a topological network division method, in particular to a topological network division method for electromagnetic transient simulation of circuits with switching characteristics. Background technique [0002] Time-domain simulation has become an important tool for power system analysis, design and research. With the wide application of power electronics technology, flexible AC transmission, high-voltage direct current Energy generation equipment generally needs to be connected to the power grid through power electronic converters, and the network topology of power electronic switches, which essentially changes with time, poses new requirements and challenges for traditional power system time-domain simulations. Especially in the real-time simulation of electromagnetic transients, on the premise of ensuring the real-time performance of the calculation, it is a thorny technical difficulty to calculate the power electronic switchi...

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Problems solved by technology

[0002] Time-domain simulation has become an important tool for power system analysis, design and research. With the wide application of power electronics technology, flexible AC transmission, high-voltage direct current Energy generation equipment generally needs to be connected to the grid through power electronic converters, and the network topology of power electronic switches, which is essentially changing with time, poses new requirements and challenges for traditional power system time domain simulation. Especially in the real-time simulation of electromagnetic transients, on the premise of ensuring the real-time performance of the calculation, it is a thorny technical difficulty to calculate the power electronic switching action at frequent and non-full-step long-term points

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