Research On The Development And Application Of Non-intrusive Multifamily Load Identification Device

The goal of the future power is Smart grid.With the application of advanced sensing,measurement technology,control methods and decision support system technology,based on the integrated,high-speed two-way communication network,the target of a reliable,safe,economic,efficient,environmentally friendly use of electric can be achieved.The non-intrusive load identification technology can identify the user's type of electrical appliances,start and stop state,power consumption and other information by collecting the voltage and current of the user's total incoming line,which is the basis of friendly interaction between power grid and residents.The technology can substantially reduce coordination,construction and maintenance costs without requiring access to in-house construction.Firstly,the non-intrusive load identification algorithm based on hierarchical classification structure is studied,three kinds of identification characteristics are proposed,and the corresponding characteristics extraction algorithm is given,which provides the design basis for the hardware design.Secondly,the non-intrusive multifamily load identification device is designed,the overall architecture of the device is proposed,and hardware module of the device is designed and implemented.The database and communication protocol are designed according to the requirement of the service data and interactive capabilities.Finally,the non-intrusive load identification comparison platform is designed,the overall architecture of the platform is presented.A subentry data acquisition system and a non-intrusive load acquisition system are designed,which shows that the start and stop identification accuracy of air conditioning and electric heating load is more than 90%,start and stop time error can be controlled within 1minute,the total power measurement error can be controlled within 2%,subentry power error of fixed frequency air conditioner is less than 20%,and the error of electric water heater is less than 10%.