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Interaction of demand response and voltage stability in smart grids

Demand Response (DR) is one of efficient tools in smart grids to manage load profile. When loads alter their consumption to respond to price signals, the voltage dependency of load powers leads to a mismatch between scheduled and obtained power consumption levels; this is called Demand Response Mismatch (DRM). To mitigate DRM and voltage rise after DR, some voltage compensators are used in the inductive mode. However, since DR is implemented in load peak hours, introduction of inductive compensators can jeopardize voltage stability of the power system. In this paper, a method is proposed to manage DRM while enough Voltage Stability Margin (VSM) is retained. The proposed method is tested on a typical 34-bus test system to evaluate its performance.