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[Introduction] The paper aims at the defects of full-load switch feeder fault handling and proposes a power network system based on multiple operating modes of full-load switch networking. The characteristics of the existing distribution network fault handling technology are analyzed, and the different components of the system are elaborated, including incoming line, intelligent terminal unit, load, tie line and trunk line. [Method] By using near communication between two adjacent intelligent terminal units, the system′s guarantee substation can be cancelled, and the logic criterion only needs to know its state and that of the adjacent switch. The constant parameter was set in a uniform and simply way, and the whole line fault processing is in a stepless coordination. The constant parameter setting is adaptive to the connection structure of various networks and the operation mode of the system, and it doesn′t need to be reset unless the physical structure of the line is changed. [Result] The test results show that each power distribution intelligent terminal with load prediction function can control one load switch or multiple load switches, which can be selected according to the site conditions. [Conclusion] The proposed system can handle faults rapidly and reliably in a variety of operating modes, and hence can be applied in practical distribution networks. |
