配电网线路阻抗动态调节器原理及其实现

doi:10.19595/j.cnki.1000-6753.tces.L80516

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Abstract As the resistance component of the line impedance of the medium and low voltage distribution network is dominant, it is difficult to compensate the line voltage drop using the traditional series capacitor method. At present, the active compensation strategy mainly aims at voltage amplitude control, resulting in a large compensation capacity and the risk of voltage stabilization induced by improper control. In view of this, this paper presents the concept of line impedance dynamic regulator. The regulator is based on series-parallel hybrid power electronic converter. By controlling the characteristics of the serial converter port into different frequency bands, positive and negative flexible adjustable R/L/C features for flexible and dynamic distribution network impedance adjustment. The paper presents the circuit topology of the impedance regulator and the control strategy of the series converter to realize the R/L/C port characteristic. The function and ability of reducing the voltage deviation of the load side under steady state are analyzed. Through simulation and experiment under the condition of linear, non-linear load and load short-circuit fault, the compensation effect on voltage amplitude/waveform deviation and the limitation effect on fault current are verified.

Key words： Line impedance dynamic regulation voltage deviation harmonic suppression com- nsation strategy fault current limit

Received: 30 June 2018 Published: 02 January 2020

PACS:

TM76

Corresponding Authors: 国家重点研发计划资助项目（2017YFB0903100）

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	Zhu Lingyi
	Sun Jianjun
	Yang Yong
	Lu Yi
	Xu Feng

Cite this article:

Zhu Lingyi,Sun Jianjun,Yang Yong等. Principle and Implementation for Impedance Dynamic Regulator in Distribution Network[J]. Transactions of China Electrotechnical Society, 2019, 34(zk2): 701-708.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80516 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/Izk2/701

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