一种无谐波检测的三相并网逆变器谐波灵活控制方法

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Abstract In order to simplify the harmonic compensation control and improve anti-interference ability to grid background harmonic voltage, a flexible harmonics control method for three-phase grid-connected inverter without harmonic detection is proposed. Herein, the local harmonic current compensation and the resistivity against grid background harmonic voltage disturbances are considered together in the controller. The proposed control method can switch between harmonic suppression mode and harmonic compensation mode depending on control targets. In the harmonic compensation mode, this method can achieve effective compensation for local load harmonic current without harmonic current detection. It will simplify the control operation of grid-connected inverter in case of harmonic compensation. In the harmonic suppression mode, this method can suppress the negative impacts of grid background harmonic voltage on the output current of the inverter, so as to improve anti-jamming capability of the inverter. By the equivalent transformation of controller from synchronous rotating reference frame to stationary reference frame, the frequency-domain model of the entire control system in stationary reference system has been established. The frequency-domain tracking characteristics and system stability have been analyzed. The simulation and experimental results have demonstrated the effectiveness of the proposed method.

Key words： Grid-connected inverters, harmonic compensation, harmonic detection, synchronous rotating reference frame, grid background harmonic

Received: 28 July 2015 Published: 03 January 2017

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TM464

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	Huang Yuan
	Luo An
	Wang Yichao

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Huang Yuan,Luo An,Wang Yichao. A Flexible Harmonic Control Method for Three-Phase Grid-Connected Inverter without Harmonic Detection[J]. Transactions of China Electrotechnical Society, 2016, 31(24): 213-222.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I24/213

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