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Published October 2011 | Published
Book Section - Chapter Open

Inverter VAR control for distribution systems with renewables


Motivated by the need to cope with rapid and random fluctuations of renewable generation, we presents a model that augments the traditional Volt/VAR control through switched controllers on a slow timescale with inverter control on a fast timescale. The optimization problem is generally nonconvex and therefore hard to solve. We propose a simple convex relaxation and prove that it is exact provided over-satisfaction of load is allowed. Hence Volt/VAR control over radial networks is efficiently solvable. Simulations of a real-world distribution circuit illustrates that the proposed inverter control achieves significant improvement over the IEEE 1547 standard in terms of power quality and power savings.

Additional Information

U.S. Government work not protected by U.S. copyright. We would like to thank Jeff Gooding, Russel Neal, Percy Haralson, Michael Montoya, Bryan Pham, Robert Yinger and Marshall Parsons in the Advanced Technology Division of the Southern California Edison's (SCE) Transmission and Distribution Business Unit (TDBU) for multiple fruitful discussions.

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