Fault Ride Through Technology of Wind Power Transmission System and Its Research Scheme

In recent years, renewable energy represented by wind power and photovoltaic has developed rapidly in the world. China's renewable energy is the fastest-growing country in terms of wind power and photovoltaic power generation. 174 million kW, accounting for about 19% of total power capacity in China, renewable energy has become the second largest power source. In some province-level regional power grids with high renewable energy penetration rates, such as Gansu, Ningxia, Xinjiang, Hebei, and Inner Mongolia, the total installed capacity of renewable energy and power sources accounted for 41.4%, 36.5%, 32.2%, 30.1%, and 28.8%, respectively. According to the 2015 report of the National Development and Reform Commission's Energy Research Institute, “China's 2050 High Proportion of Renewable Energy Development Scenarios and Path Studies”, by 2030, the cumulative installed capacity of wind and solar power will exceed 2.05 billion kW, accounting for approximately 51% of the country's total installed power capacity. With the rapid growth of the proportion of wind power, wind power must change its role from a supplementary power source to a main power source, and actively participate in power grid operation control to achieve wind-power-friendly grid connection. In the transient process of the power grid, in order to effectively solve the problem of transient active support for large-scale wind power grid connection, it is urgent to carry out a demand analysis of wind power fault ride-through characteristics and master the key technologies of active support control in the transient process of wind power.