Abstract
Smart meter is a typical edge device that measures and records the energy data. The usage of smart meter data can improve the cyber physical relationship between the smart grid and cyber physical system. Millions of smart meters have been installed all around the world and the malfunction detection of large volume meter is a big issue. On site checking is a costing work and cannot meet the requirement for large scale meters. Online malfunctional meter detection and verification based on meter data analytics is a solution to the meter detection problem. For the purpose of detecting malfunctional smart meter, the low-voltage energy system model is studied and a meter error estimation method is proposed in this paper. This method adopts a decision tree to filter the abnormal data and classify data with different energy loss levels. Then clustering the data to obtain the data set with different energy usage behavior. A meter data matrix is constructed and meter error can be calculated from the solution of the matrix equation. A Recursive algorithm is adopted to solve the equation and estimate the meter error. The meter error above the regulation threshold will be classified as a malfunctional meter. The proposed approach has achieved higher accuracy in the experiment.
Highlights
Smart grid integrates the power network infrastructure and cyber system and exhibits a typical nature of cyber physical system (CPS) [1]
The two main contributions of our work are summarized below: (1) We propose a model for detecting large scale smart meter error verification
The meter reading error is an indicator widely used in the verification of smart meters by comparing the meter error with a threshold defined in official regulation
Summary
Smart grid integrates the power network infrastructure and cyber system and exhibits a typical nature of cyber physical system (CPS) [1]. Smart grid aims to operate power technologies on the energy system to realize bidirectional power flows [2]. With the development of advance power technologies, the interconnected nature of sub-power system is becoming more complex and the cyber-physical component in energy grid is becoming more and more important. Smart meters are important components in smart grid and the usage of smart meter data can improve the cyber physical relationship between smart grid and CPS. Smart meter can be used as sensors in the entire energy distribution grid because it can measure the energy usage and send the recorded data to energy management center [3].
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