Journal
SUSTAINABLE ENERGY GRIDS & NETWORKS
Volume 32, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.segan.2022.100794
Keywords
Demand shaping; Load shaping; Multi-objective optimization; Privacy; Reactive power; Smart metering
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This study addresses the importance of load shaping for protecting consumer privacy in smart grids and presents a multi-objective optimization framework to analyze the interplay between privacy maximization, user cost minimization, and user discomfort minimization. The results reveal that joint shaping of real and reactive power components can significantly improve privacy preservation performance.
Frequent metering of electricity consumption is crucial for demand-side management in smart grids. However, metered data can be processed fairly easily by employing well-established nonintrusive appliance load monitoring techniques to infer appliance usage, which reveals information about consumers' private lives. Existing load shaping techniques for privacy primarily focus only on altering metered real power, whereas smart meters collect reactive power consumption data as well for various purposes. This study addresses consumer privacy preservation via load shaping in a demand response scheme, considering both real and reactive power. We build a multi-objective optimization framework that enables us to characterize the interplay between privacy maximization, user cost minimization, and user discomfort minimization objectives. Our results reveal that minimizing information leakage due to a single component, e.g., real power, would suffer from overlooking information leakage due to the other component, e.g., reactive power, causing sub-optimal decisions. In fact, joint shaping of real and reactive power components results in the best possible privacy preservation performance, which leads to more than a twofold increase in privacy in terms of mutual information. (c) 2022 Elsevier Ltd. All rights reserved.
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