Privacy Enhancer for Smart Meter Load Signature Masking
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Solution Overview
Problem
Smart grids face significant privacy concerns due to the detailed energy usage data collected by smart meters, which can reveal sensitive information about household activities, such as appliance usage patterns, posing risks to user privacy and requiring effective solutions to protect this data.
Innovation Solution
A system that modifies load signatures by using locally generated and stored power to satisfy consumption demands, altering the outward appearance of power consumption events, thereby masking individual appliance usage without compromising user experience or operational transparency, while enhancing grid efficiency and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If smart meters collect detailed energy usage data, then grid management and optimization are improved, but user privacy is compromised
Solution Approach 1:
The patent introduces a privacy enhancer as an intermediary device between smart appliances and the smart meter. This privacy enhancer acts as a mediator that receives detailed metering data from appliances, processes it through anonymization algorithms, and forwards only anonymized data to the smart meter. This resolves the contradiction by enabling grid management functionality while protecting user privacy through the intermediary's data transformation capability.
Solution Approach 2:
The patent extracts and removes personally identifiable information and sensitive usage patterns from the raw metering data before it reaches the smart meter. The privacy enhancer identifies and extracts only the essential grid management information while discarding or anonymizing the privacy-sensitive components, thus resolving the contradiction between data utility and privacy protection.
2Ease of operation
If detailed appliance usage data is transmitted to utility providers, then consumption management is improved, but security risks increase
Solution Approach 1:
The privacy enhancer serves as a security intermediary that filters and anonymizes data before transmission. It maintains consumption management capabilities by preserving essential usage patterns while removing security-sensitive information, thus reducing security risks without compromising operational ease.
Solution Approach 2:
The patent converts the potential harm of detailed data exposure into a benefit by using the same detailed data locally to generate anonymized statistics. The privacy enhancer utilizes the full detail of usage data to create meaningful consumption management insights while simultaneously transforming the data into an anonymized form that eliminates security risks.
3Measurement precision
If smart meters monitor all power consumption, then load signature accuracy is improved, but privacy protection becomes difficult
Solution Approach 1:
The privacy enhancer intermediary processes the accurate load signature data by applying anonymization algorithms that preserve the statistical properties needed for grid management while removing the identifying characteristics that would compromise privacy. This allows load signature accuracy to be maintained for technical purposes while privacy is protected through data transformation.
Solution Approach 2:
The patent applies different quality treatments to different aspects of the data: the overall load signature pattern is preserved with high fidelity for grid management purposes, while specific identifying details are anonymized. This local differentiation allows simultaneous achievement of measurement precision and privacy protection by treating different parts of the data differently.
Data Source
AI summary
According to an embodiment there is provided a system comprising an input for connecting the system to a power supply, at least one further power source, at least one power consumer, an identifying unit arranged to identify, based on information originating from within the system, an ongoing and/or future power consumption event by the at least one power consumer and a power router that comprises a controller and that is arranged to route power to the power consumer from at least one of the power supply and the at least one further power source, the power router storing rules that define at least part of the routing operation of the router. The power router is arranged to route power to an power consumer in accordance with the rules so that at least a part of the power consumed by the power consumer during the power consumption event is provided by the at least one power source, rather than through the input, in response to the identifying unit identifying a power consumption event.