Integrated Design And Implement Of12kV Smart Switchgear

The switchgear is one of the most important equipment of the power controllingsystem. With the construction and development of the national smart grid, switchgearcontinuously develops towards intelligent direction. As traditional switchgear missingintelligent controller and the stability of which is relatively low, it is gradually replaced bysmart switchgear which combines advanced science and technology, such asmicroelectronics technology, communications technology, computer technology and sensortechnology. In this thesis, the project integrates with a switchgear manufacturer’sproduction project. The paper explores several key technologies of smart switchgear andswitchgear stability.Firstly, the structure of smart distribution grid is introduced and the important rolewhich switchgear plays in the smart distribution grid is clarified. Then the paper analyzesthe development statues of smart switchgear home and aboard. The inadequacies oftraditional switchgear are also analyzed. According to the work done above, the designideas of the smart switchgear are certified. The paper completes the innovative design ofsmart switchgear through two core technologies. Through integrated design of vacuumpermanent magnet circuit breaker, isolation switch and grounding switch, and placing themin fully enclosed inflatable cabinet, the security and stability of switchgear are ensured. Theintelligent function of switchgear is achieved by the research and application of theself-healing function in smart distribution grid.Next, the paper describes the core devices of the smart switchgear in detail, which arevacuum permanent magnet circuit breaker and intelligent controller. Selection principles ofvacuum permanent magnet circuit breakers are described, also as the main features andadvantages of the selected vacuum permanent magnet circuit breaker. Innovativeself-healing function of distribution grid is described in detail as a design principle of theintelligent controller. All kinds of functions of intelligent controller are represented in thepaper.Finally, the paper introduces other advanced technology of the smart switchgear, including a fully sealed air cabinet and modular design techniques. At the same time, thepaper briefly describes the application of this smart switchgear in the distribution grid. Thedesign of smart switchgear is summarized and the outlook of the smart switchgear is made.This smart switchgear has passed the relevant testing authorities at home and abroadand successfully applied in smart distribution grid in several cities, which implies theachievement of desired objectives. The successful manufacture of the smart switchgear laysthe foundation of studying smart switchgear, and plays a guiding role of future developmentof smart switchgear.