APPLICATION RESEARCH OF POWER ELECTRONIC TRANSFORMERS IN FREQUENCY/VOLTAGE REGULATION OF DISTRIBUTION NETWORKS

Ji Zhendong; Wang Yaxiang; Li Dongye; Sun Yichao; Wang Jianhua; Zhao Jianfeng

doi:10.19912/j.0254-0096.tynxb.2023-0250

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (6) : 182-190. DOI: 10.19912/j.0254-0096.tynxb.2023-0250

APPLICATION RESEARCH OF POWER ELECTRONIC TRANSFORMERS IN FREQUENCY/VOLTAGE REGULATION OF DISTRIBUTION NETWORKS

Ji Zhendong¹, Wang Yaxiang¹, Li Dongye², Sun Yichao³, Wang Jianhua⁴, Zhao Jianfeng⁴

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Abstract

In order to improve the stability of distribution network, this paper proposes to use power electronic transformer to regulate the voltage and frequency of distribution network. The input stage of power electronic transformer is used to regulate the reactive power of distribution network. A reactive power regulation method is proposed based on the voltage droop characteristic, and the reactive current feedback is introduced to improve the voltage quality and stability of distribution network. At the same time, the load voltage is controlled by the output stage of the power electronic transformer to regulate the active power of the distribution network as a primary frequency regulation reserve load, thus reducing the frequency deviation during the frequency transient. Through the experimental verification of the voltage and frequency regulation control method based on power electronic transformer of the distribution network, the proposed control strategy can improve the voltage and frequency quality of the distribution network, and effectively enhance the stability of the distribution network.

Key words

new energy / distribution network / power electronic transformer / reactive power regulation / voltage droop characteristic / primary frequency regulation

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Ji Zhendong, Wang Yaxiang, Li Dongye, Sun Yichao, Wang Jianhua, Zhao Jianfeng. APPLICATION RESEARCH OF POWER ELECTRONIC TRANSFORMERS IN FREQUENCY/VOLTAGE REGULATION OF DISTRIBUTION NETWORKS[J]. Acta Energiae Solaris Sinica. 2024, 45(6): 182-190 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0250

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