Decentral Load Control for Grid Stabilization Renewable energies lead to a decentralization of power generation but also to a destabilization of the power grid, as photovoltaic or wind turbine systems provide nearly zero inertia that is essential for a stable power grid. Leveraging consumer devices to support already present grid control systems counter the growing grid instability. These devices may adapt their power consumption continuously, rather than erratic onoff switching, to provide a gridfriendly stabilization effect. Simulations with a grid model of Continental Europe and multiple consumer load control schemes with different consumerimpact levels were performed to analyze stabilization effect and user tolerability. The results show effective stabilization by the tested consumer load control schemes during a reference incident, allowing them to be used for various devices and device groups. Additional, the simulations proved the scalability of the proposed control algorithms.

A Control Strategy for Voltage Unbalance Mitigation in an Islanded Microgrid Considering Demand Side Management Capability Inverterbased distributed generators (DGs) have been customarily used for voltage unbalance (VU) mitigation in microgrids. The sole dependency on DGs for VU mitigation may not be justified, particularly in islanded microgrids. Demand side management (DSM) can be a potential candidate for VU mitigation in microgrids. Therefore, this paper presents a new VU mitigation scheme for an islanded microgrid by coordinating photovoltaic (PV) gridtied inverters, and thermostatically controlled loads (TCLs). A negative sequence compensation loop working in parallel with a positive sequence compensation loop is designed for PV inverters for VU mitigation. Also, a voltage dependent model of TCLs, unlike the conventional one, along with the control strategy for VU mitigation is presented. The proposed control of TCLs not only minimizes VU, and hence increases the dynamic reactive power reserve of the inverter based DGs, but also effectively maintains the customersu0027 thermal comfort. The proposed VU mitigation scheme is studied with comprehensive simulations in PSCADEMTDC, and is verified using a realtime digital simulator, OPALRT. Simulations and realtime results of the proposed scheme demonstrated the regulation of voltage unbalance factor (VUF) within the permissible range defined by IEC and CIGRE Working Group 36.07.