A Frequency Security Analysis of Wind Integrated Power Systems with Frequency Controls

A power grid with a high penetration of renewable power generation faces new issues that have not been there before. The frequency in the power system is highly related to the mass and the rotational speed of the operational synchronous machines. With more and more power electronic converters as energy generation units, the mechanical rotating mass is decreasing, which causes more and higher frequency disturbances. Several controls for short term frequency controls in the power electronic based generation units have been proposed, but their impact on the frequency reliability is only a minor researched topic. This paper will analyze different basic control strategies in power electronic converters to enhance operational reliability of the power system regarding the short term frequency reliability.