Large-step-size multi-switch electromagnetic transient state simulation method capable of setting time in real time

Abstract

The invention relates to a large-step-size multi-switch electromagnetic transient state simulation method capable of setting time in real time. The method includes the following steps: calculating a first step-size point state value of electromagnetic transient state and finding that the switching motion exists in the step size; performing interpolated value calculating for a first switching motion point state value; performing interpolated value calculating for a second switching motion point state value; calculating a next step-size point state value; calculating the whole step-size point state value from the state value interpolated value of the current step-size point; and calculating the whole step-size point state value from the state value extrapolated value of the current step-size point. The method can improve calculating speed of a switching subnet, is favorable for timeliness calculating, provides time margin for improvement of switching calculation accuracy, can be applied to electromagnetic transient state simulation calculating of switching characteristic circuits of real-time calculating, super real-time calculating and off-line calculating, can be compatible with various electromagnetic transient state switching algorithms, effectively improves simulation calculating speed and accuracy, and optimizes electromagnetic transient state real-time calculating performance.

Description

technical field [0001] The invention relates to a fixed-point simulation method, in particular to a real-time fixed-point electromagnetic transient simulation method with large steps and multiple switches. 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 switching action at frequent...

AI Technical Summary

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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