Non-intrusive smart power meter
Choy, Zheng Yan
Date of Issue2017-05-15
School of Electrical and Electronic Engineering
EverComm Uni-Tech Singapore Pte Ltd
The concept of nonintrusive load monitoring (NILM) was first introduce by G. W. Hart, in 1982. The NILM then, drive toward electrical load disaggregation through steady-state analysis, with the use of finite state machines incorporate with Viterbi Algorithm. The NILM aim was to disaggregate the electrical loads in a building from a single entry point power measurement. As such NILM simplify the installation of effort needed for power usage data collection, and disaggregating the data to determine the load usage in the building. Essentially, these provide substantial savings in cost and time with the implementation of NILM system. The feasibility of nonintrusive monitoring approach has been successful, with the commercially available NILM product in the market today. The concept of NILM single entry point metering, and together with data processing acquires the aggregated load usage, remain unchanged till date. In these project, the focus is on prototyping a non-contact power meter for the purpose of establishing a reliable single point entry metering device, proposed by John S. Donnal (2015). The project involve an attempt to understand the circuit topology and further replicate the non-contact power meter. In particular, the focuses was to determine the workability of the non-contact power meter and subsequently implement it for power measurement and computation of targeted power system power consumption. The outcome of the project was, in total six tests had been carry out. Each test has evaluate positively toward the workability of the non-intrusive voltage sensor and non-intrusive current sensor circuit, of the non-contact power meter introduced by John S. Donnal. However, the result presented of the device was not as accurate as expected with comparison made to traditional intrusive power meter from FLUKE. In conclusion, the efforts has proven the workability of the prototyping power meter sub modules, namely the non-intrusive voltage and current sensor circuit. However, the preprocessor of the non-contact power meter was incomplete, as such the non-contact power meter is incomplete. Future work has to be focus on completing the preprocessor of the non-contact power meter, and at the same time improve on the accuracy of the non-intrusive voltage and current sensor, and the sensor testbed.
Final Year Project (FYP)
Nanyang Technological University