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Approximate Load Models for Conic OPF Solvers
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DOI：10.1109/TPWRS.2020.3029370.png)
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Abstract
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The global optimum of the optimal power flow (OPF) problem can be sought in various practical settings by adopting the conic relaxations, such as the second order cone programs (SOCPs) and semi-definite programs (SDPs). However, the ZIP (constant impedance, constant current, constant power) and exponential load models are not directly amenable with these conic solvers. Thus, these are mostly treated as constant power loads in the literature. In this letter, we propose two simple methods to approximate these static loads with good accuracy. The proposed methods perform much better than the traditional constant power approximation.
Keywords:
Exponential load model
optimal power flow
second order cone programming
semi-definite programming
ZIP load model
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