Research And Development On The Detection And Control System Of Smart Demand Side

Smart Demand Side (SDS) is an important part of smart grid. It can not only promote various distributed generation (DG) penetrating in the distribution network, but also can regulate the load flexibly according to the operation state of power grid and the requirements of consumers. SDS alleviates the severe environmental and energy issues to some extent. However, the random output characteristics of DG and the complexity of its control also pose a threat to the power quality and safety of SDS.Based on the actual impact of SDS integration on the operation of power grid, various urgent problems with DG integrating into the power grid are analysised in this paper. In order to solve the above problems, a SDS detection and control system is developed. The system is consisted of the grid-connected detection & control platform (GCDCP), smart switch and energy router. The GCDCP includes control strategies and hardware development.The strategy section is divided into detection scheme and control strategy.Firstly, the implementation scheme of SDS GCDCP is put forward, including detection part and test part. The detection part consists of energy storage system grid-connected detection and power quality detection, the test part consists of adaptive protection test and anti-islanding protection test. The important role of energy storage system in SDS is mainly considered in the detection part.Secondly, the control strategy of the control part in SDS GCDCP is proposed. The dynamic characteristics and control model of active load in SDS is studied. Based on the control model of active load, the emergency control strategies and prevention control strategies of active load are put forward. In prevention control strategies, in order to minimize the tie-line power, maximinze power company profits and optimize the ecomony of electricity consumption, the multi-objectives coordinated control strategy of active load is proposed.Finally, a SDS GCDCP based on the above strategies is developed. At the same time, smart switch, which is the information collection and control termal, is implemented. The design scheme of energy router is also proposed. Then the software and hardware development of SDS GCDCP is realized. The design of hardware consists of overall framework, hardware selection and circuit analysis of all functional modules. Software design includes the subroutine program and calculation program. At last, effectiveness of the SDS grid-connected detection & control system is verified by experiments.