Enhanced System Frequency Response Model Considering Network Parameters and Distributed Energy Resources

Power system frequency is a critical parameter for system stability and should be maintained within a specific range to ensure stability during a contingency. A simplified system frequency response (SFR) model is often used to analyse the system frequency following a contingency. With the integration of power electronic interfaced renewables, it is essential to improve the SFR model. This paper proposes enhancements to the SFR model considering network losses, voltage drop and the voltage dependency of load. The enhanced SFR model is validated with a detailed power grid model developed in DIgSILENT PowerFactory. The enhanced SFR model is in good agreement with the detailed system model.