Smart Meter Privacy With Renewable Energy and an Energy Storage Device
Smart Meter Privacy With Renewable Energy and an Energy Storage Device
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DOI：
10.1109/tifs.2017.2744601
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发表时间：
2018-01-01
影响因子：
6.8
通讯作者：
Poor, H. Vincent
中科院分区：
文献类型：
--
作者：
Giaconi, Giulio;Gunduz, Deniz;Poor, H. Vincent
智能电表(SM)测量消费者的用电量，并几乎实时地自动报告给公用事业提供商(UP)。尽管短信有很多优点，但它们的使用也引发了人们对消费者隐私的严重担忧。本文通过考虑可再生能源(RES)和可充电电池(RB)的存在来研究SM隐私，它们可以部分地隐藏消费者的能源消费行为。隐私是通过信息泄漏率来衡量的，信息泄漏率表示用户的实际能源消耗与从电网请求的能源之间的平均交互信息，SM读取并向UP报告。此外，还考虑了已知在上升阶段由RE产生的能源量的影响。在两种极端情况下，即电池容量为无穷大或为零时，最小信息泄漏率被刻画为可计算的信息论单字母表达式。给出了有限电池容量情况下的数值结果，以说明RB的存在带来的潜在隐私收益。结果表明，虽然信息泄漏率随着资源可用性的增加而降低，但需要更大的存储容量才能充分利用可用能量来改善隐私。
A smart meter (SM) measures a consumer's electricity consumption and reports it automatically to a utility provider (UP) in almost real time. Despite many advantages of SMs, their use also leads to serious concerns about consumer privacy. In this paper, SM privacy is studied by considering the presence of a renewable energy source (RES) and a rechargeable battery (RB), which can be used to partially hide the consumer's energy consumption behavior. Privacy is measured by the information leakage rate, which denotes the average mutual information between the user's real energy consumption and the energy requested from the grid, which the SM reads and reports to the UP. The impact of the knowledge of the amount of energy generated by the RES at the UP is also considered. The minimum information leakage rate is characterized as a computable information theoretic single-letter expression in the two extreme cases, that is, when the battery capacity is infinite or zero. Numerical results are presented for the finite battery capacity case to illustrate the potential privacy gains from the existence of an RB. It is shown that, while the information leakage rate decreases with increasing availability of an RES, larger storage capacity is needed to fully exploit the available energy to improve the privacy.