A Phase Locked Loop Method for Low Voltage Ride-Through Control in Three-Phase Three-Wire Photovoltaic Grid System

Abstract:

Low voltage ride through (LVRT) is regarded as one of the biggest challenges in photovoltaic grid equipments designing, manufacturing and control technology. The fast and accurate automatic phase locked control is the premise to achieve photovoltaic grid low voltage ride through. Considering that the traditional phase locked loop method is difficult to adapt the performance requirements of low voltage ride through (LVRT) in three-phase three-wire photovoltaic grid system, this paper presents a new three-phase unbalanced phase locked loop method. Improved second order generalized integral orthogonal signal generator (SOGI-OSG) is used for line voltage detection; Synchronous reference frame for phase locked loop (SRF-PLL) is used for line voltage phase locked and phase angle detection; Heron formula and Sine theorem is adopted to calculate the three-phase phase voltage amplitude and phase angle. Research results show that when grid voltage dips, this phase locked loop method can detect the fault signal accurately. It provides a technical support for photovoltaic grid low voltage ride through system.

• Periodical: Applied Mechanics and Materials (Volume 415)
• Pages: 174-179
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.415.174
• Online since: September 2013
• Authors: Bao Ding, Gong Zhang, Yong Ming Zhang, Liang Zhao
• Keywords: Grid Control, Low Voltage Ride through (LVRT), Phase Locked Loop, Three-Phase Three-Wire

References

[1] Zhao Zhengming, Lei Yi, He Fanbo, et al: Automation of Electric Power Systems, Vol. 35, (2011), p: 101-107.

[2] Varma R K, Salama M, Seethapathy R, et al: Proceedings of 2011 IEEE Power & Energy Society General Meeting, (2011), p: 1-4.

[3] Xu Dianguo, Wang Wei, Chen Ning: Proceedings of the CSEE, Vol. 30, (2010), p: 29-36.

[4] Yao Jun, Liao Yong, Zhuang Kai: Automation of Electric Power Systems, Vol. 33, (2009), p: 91-96.

[5] Wei Lan, Chen Yuchen, et al: Transactions of China Electro technical Society, Vol. 26, (2011), p: 30-36.

[6] Li Hui, Fu Bo, Yang Chao: Proceedings of the CSEE, Vol. 32, (2012), p: 24-31.

[7] Zheng Fei, Zhang Junjun, DING Mingchang: Automation of Electric Power Systems, Vol. 36, (2012), p: 19-24.

[8] Zhang Junjun, JU Rongrong, QIN Xiaodi, et al: Proceedings of 2012 Second International Conference on Intelligent System Design and Engineering Application, (2012), p: 1435-1439.

[9] Alatrash H, Amarin R A, Cheung Lam: Proceedings of 2012 IEEE Green Technologies Conference, (2012), p: 1-6.

[10] Ma Lin, Liao Hua, Li Jing, et al: Proceedings of 2012 7th International Power Electronics and Motion Control Conference (IPEMC), (2012), p: 178-1182.