A weight-numerical integration based interpolation algorithm for simulation of power electronic circuit

被引：0
|
作者：
Huang, Yupeng [1 ]
Wang, Keyou [1 ]
Li, Guojie [1 ]
机构：
[1] Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education (Shanghai Jiao Tong University), Minhang District, Shanghai
来源：
Dianwang Jishu/Power System Technology | 2015年 / 39卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Electromagnetic transients; Multi-switching events; Reinitialization; Resynchronization; Weight-averaged integration;
D O I：
10.13335/j.1000-3673.pst.2015.01.023
中图分类号：
学科分类号：
摘要：
With wide application of power electronics apparatuses in modern power system, electromagnetic transient program (EMTP) have to face with new challenges due to high-frequent topologic sudden change caused by the action of power electronic valves. For this reason, a new interpolation algorithm for the simulation of power electronic circuits is proposed to ensure the accuracy and reliability of control system. Under the condition of global implicit trapezoidal integration, at the action point of the power electronic valve the proposed algorithm computes system variables by linear interpolation and reinitializes the control system by backward Euler method, then according to the position of the interpolation point in current simulation step the weight-numerical integration is utilized to flexibly adjust the integration step-length and the fast integration is carried out to determine the time point of the resynchronization in the simulation. During the action of power electronic valves, the proposed algorithm reinitialize the simulation via only once of interpolation, and during the reinitialization the nodal admittance matrix is kept unchanged, thus the numerical oscillation can be effectively suppressed. Under the premise of ensuring accuracy, the proposed algorithm can reduce the calculation burden and accelerate the computation, and the multiple-switch problem is taken into account. Both adaptability and effectiveness of the proposed algorithm are validated by case study. ©, 2014, Chinese Society of Astronautics. All right reserved.
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页码：150 / 155
页数：5
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