Static voltage stability detection using local measurement for microgrids in a power distribution network

Microgrid, integrated with generation, storage, and load, either produces or consumes power. When power consumption increases at a microgrid’s point of common coupling (PCC), the entire power distribution network is at risk of voltage collapse. Critical load impedance and continuation power flow were currently used to assess static voltage stability in power systems. Critical load impedance was derived based on a Thevenin equivalent circuit model, but information used to derive the equivalent circuit is usually not available and accurate parameter estimation takes time. Because continuation power flow used approximation, this method is not accurate unless close to voltage collapse. To predict impending voltage collapse for a microgrid, this paper introduces a static voltage stability detector that only uses local measurements available at the microgrid’s PCC. A voltage stability index depicts the distance of microgrid’s power consumption from voltage collapse. Therefore, micro...

• Type: Journal
• Year: 2015
• Where: CDC
• Authors: Zhao Wang, Hongbo Sun, Daniel Nikovski
• Keywords: CDC 2015, Control Systems