Research On Key Technologies Of Low-voltage Side Power Management Based On Load Characteristic Identification

Now, with the increasing development of energy demand, the energy efficiency is becoming prominent, especially the gradual lack of resources today, so as an scheme for energy efficiency, demand side management (DSM) has been growing attention. DSM is an electric power service management which makes all quarters can profit at smallest cost, it runs under the supports of laws and government policy, let all quarters unite efforts together enhances the electricity efficiency and change the way of energy consumption. The goal of DSM is reduce power consumption or electricity demand growth at the precondition of keeping the same function of power system, which save resources and protect the environment from the source.The main contents and contributions are as follow.(1) Make the investigation to the electrical environments of low-voltage side, and set residential area as the research target which is the most complicated in the low-voltage side. A detailed investigation of residential loads is implemented for proper load classification of identification, the structure and functions of main parts in power management system are the discussed and settled.(2) Rebuild the raw sampling data flow by a new desription model which is simpler at the storage space without cost the fidelity of the raw data. The algorithm is designed simple enough for embedded into the energy meter, which ensure the cost of manage system can be accepted.(3) Research on the main problems of load identification, which can be summaried into three parts, feature extraction, objects(loads) classification and identification function, these can be soluted by clustering algorithm and linear discriminant function, the algorithm theory and specific design will be present in this paper in details.(4) Analysis and research on the load management modes of DSM, classifies these modes into hard and soft way by whether do operation to loads directly, then builds manage modes based on the new load identification algorithm. The new manage mode sets necessity of the loads as the classification criteria and build rules for each load class, such as necessity-traiff modes(soft management) and interruptible load class management(hard management).Based on the contents above, new multi-function energy meter which meet the requirments of load identification system, and an platform based on MATLAB for data and information exchanging and processing, experiments and analysis results are presented in the papar.