Influence of grid connection and countermeasures in different photovoltaic reactive power control methods
Diğer, ss.1-8, 2018
- Yayın Türü: Diğer Yayınlar / Diğer
- Basım Tarihi: 2018
- Sayfa Sayıları: ss.1-8
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Kocaeli Üniversitesi Adresli: Hayır
Özet
In order to solve the problems of active power fluctuation due to disturbance factors such as illumination intensity, the limit of the grid voltage, and the frequent switching of protection actions, it is necessary to study the reactive power and voltage management strategies when the photovoltaic system is connected to the grid. The article compares the two methods of the fixed power factor control method and the constant voltage control method, which are commonly used in photovoltaic power plants, and uses Matlab to model the grid-connected system of photovoltaic power generation system. The influence of different reactive power control modes on the power characteristics under the intensity disturbance is studied. It is proves that the constant voltage control mode is superior to the constant power factor control method in terms of voltage support capability and system stability. Finally, through the example of photovoltaic grid-connected in Qinghai, the related verification is carried out, and the countermeasure strategy is proposed that the dynamic reactive power compensation device such as SVG can be installed to improve the dynamic adjustment capability of the system. This research can provide a theoretical and empirical reference for solving the practical problems brought by large-scale photovoltaic grid connection.