Jian Z.,Shenzhen Golden Highway Technology Co. |
Situ Q.,Shenzhen Golden Highway Technology Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2015
To meet the requirements to low voltage ride-through (LVRT) capability of photovoltaic grid-connected inverter under three-phase voltage unbalanced dips, this paper proposes a current positive sequence synchronous rotational coordinate independent control method. In the strategy, the positive and negative sequence component is controlled independently. So that the negative sequence current and the grid current harmonics can be retrained. So the photovoltaic grid-connected inverter can work well at LVRT situation, and shall not affect the power quality of power grid. The positive and negative sequence component detection of the grid voltage are studied in detail and the pro and con of two detection methods are analyzed and one of them is selected and verified. The LVRT method proposed has passed the no voltage ride-through certification, which verifies the effectiveness of the proposed technical solution. ©, 2015, Power System Protection and Control Press. All right reserved.
Hu Y.,Shenzhen Golden Highway Technology Co. |
Guo Z.,Shenzhen Power Supply Bureau Co. |
Liu Q.,Shenzhen Golden Highway Technology Co. |
Tang M.,Shenzhen Golden Highway Technology Co.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2013
According to requirements of electric vehicle (EV) charging station and its development trend, a modeling scheme of supervisory and control system for EV charging station based on IEC 61970 and IEC 61850 series standards is put forward. In addition, an EV charging station system model, device information model and communication model are also established, and its modeling methods are introduced. The implementation of intelligent electronic device (IED) information integration and the application prospect of system solutions are also presented. © State Grid Electric Power Research Institute Press.