Quantitative Risk Assessment and Control Method for Photovoltaic-integrated Power System

With the development of smart grid, operation and control methods of power grid are more abundant and flexible, which makes contribution to solve the uncertain risks introduced by photovoltaic (PV) power plants, and also puts forward higher requirements for the decision-making effects of power grid. This paper first analyzes the role of three measures in the regulation and control of photovoltaic-integrated power system from the perspective of security and economy, namely inverter phase modulation, grid dynamic segmentation, and distributed power flow controller (DPFC). Then, taking DPFC as an example, a quantitative risk assessment and control method for photovoltaic-integrated power system is proposed. This method takes into account the uncertainty of photovoltaic output and the regulatory costs to quantify the operational control risk and control effect of the PV-integrated power system. Finally, IEEE RTS79 test system is established to verify the rationality and effectiveness of the proposed method.