基于开关函数的脉冲功率负载大信号模型研究

doi:10.19595/j.cnki.1000-6753.tces.190849

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Abstract

As the representative of pulsed power load (PPL), the modern electronic radar contains a large number of power-electronic devices, and the working cycle of the radar usually ranges from 10-2s to 10-1s. If it is connected to an isolated microgrid, its operation mode will bring great challenges to the safety and stability of the microgrid system. In order to analyze the influence of PPL on the stability of the isolated microgrid, this paper proposed a large-signal model for PPL based on the switching functions. This model adopted a novel equivalent topology of PPL, which consists of a three-phase diode rectifier, a Buck converter and a DC switching load. By analyzing the operation states and switching functions of power electronic components for the rectifier, converter and switching load, this model established the equations of dynamic voltages and currents for the interface between the PPL and the external grid. Based on the PPL modeling, a diesel generator system with PPL could be modeled, and the corresponding indicators such as the fluctuation ratios of frequency and DC voltage, δf and δu_dc respectively, could be analyzed. The analyzing results indicate that the tendencies of δf and δu_dc solved by the model consist with those from the test under the same conditions, which verifies the correctness of the proposed large-signal model for PPL.;

Key words： Pulsed power load equivalent topology large-signal model isolated microgrid

Received: 17 July 2019

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TM71

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	Articles by authors
	Yan Jun
	Wang Jinquan
	Chen Ying
	Huang Kefeng
	Shen Chen

Cite this article:

Yan Jun,Wang Jinquan,Chen Ying等. Study on Large-Signal Model for Pulsed Power Load Based on Switching Functions[J]. Transactions of China Electrotechnical Society, 2020, 35(16): 3509-3517.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190849 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I16/3509

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