A real-time non-fixed-point interpolation calculation method for switch within step size

Abstract

The invention relates to a real-time uncertain-point interpolation calculation method for a switch within a step. The method includes the following steps: calculating the state value of the first step point of the electromagnetic transient state, and finding that there is a switch action within the step length; performing interpolation calculation on the state value of the switch action point; calculating the next step point from the switch action point Calculate the long state value; extrapolate from the current step point to the next computed full step point. When the method calculates the switching characteristic circuit, the calculation speed of the switch subnet can be improved, which is beneficial to the real-time calculation. Thereby providing a time margin for improving the accuracy of switching calculations, and can be applied to the electromagnetic transient simulation calculation of switching characteristic circuits in real-time, super real-time, and off-line calculations, and the full-step calculation can be compatible with various electromagnetic transient switching algorithms And not limited to such as trapezoidal integration method, backward Euler method, trapezoidal integration method with damping or its modified combination, which can effectively improve the calculation speed and accuracy of simulation, and optimize the real-time calculation performance of electromagnetic transient state.

Description

technical field [0001] The invention relates to a calculation method, in particular to a real-time uncertain-point interpolation calculation method of a switch within a step. 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 and non-full-step long-term po...

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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