Since a microgrid includes high-penetration wind turbines

photovoltaic generation units

diesel generators

load and other components

its frequency regulation is difficult. In order to make full use of standby resources(wind

diesel and load)on improving the performance of frequency regulation

considering the optimization of overall microgrid frequency

this paper proposes a coordinated frequency regulation strategy of wind

diesel and load for microgrid with high-penetration renewable energy. According to the interaction of frequency characteristics between wind

diesel

load and microgrid

the frequency characteristics of the microgrid with high-penetration wind power are deduced

and a frequency characteristic model of microgrid combined with coordinated frequency regulation of wind

diesel and load is developed. Then the frequency characteristics of the microgrid under different regulation parameters are compared and analyzed. The wind turbines and diesel generators always participate in the frequency regulation

and the controllable load is involved in the frequency regulation only when the sudden change of load is greater than the spare capacity of wind turbines and diesel generators. The frequency regulation coefficient of the controllable load changes according to the frequency fluctuation. Thus

the spare capacity of wind turbines and diesel generators for frequency regulation and the power supply reliability are both considered. The microgrid can not only make full use of the frequency regulation capability of wind turbines and diesel generators

but also reduce the frequency regulation pressure of the controlled load

to ensure the power supply reliability on the demand side. The simulation results show that the proposed frequency regulation strategy can effectively improve the frequency stability of microgrid with high-penetration renewable energy

and reduce the frequency regulation pressure of controlled loads.