Distribution Network Target Grid Implementation Strategy

For a long time, China’s electric power planning studies focus primarily on the planningand the main power network planning, power grid construction with a relatively backwardcountry, the lack of rational planning and design, equipment is older. In recent years, thepower sector has become increasingly well aware of the need for network planning withtransformation, power and began to focus on the planning of the pendulum in the low voltagedistribution network planning transformation. All regions have also performed from anexisting distribution network situation analysis, planning and re-transformation based on theactual needs and possibilities to look to improve safety, reliability, economy and quality ofpower supply to accommodate the current national economic and society.With the national economy and people’s lives on the growing demand for electricity, thecurrent Foshan load electricity network has been difficult to meet the growing demand. Part ofthe line and ring network settings too difficult to effectively play the role of backup (such asFen Jihua station south line and8line looped back to other outlets), diversity operation modeincreases the complexity of the distribution network is running. To ensure the continuedeconomic development of the city in the future, distribution planning, construction andrenovation work more and more important to put in front of decision makers at all levels.Voltage distribution network in urban planning, select the grid structure is very important.Therefore, the power supply capacity of the existing power grid can be transferred to enhancethe transformation process, the urgent need for a status quo power can be combined tofacilitate excessive wiring clear, simple wiring pattern to guide the province’s fast and raisewith network management level.This paper first describes the target grid distribution network reconfiguration andimplementation of purpose and meaning, the study analyzed the current situation at home andabroad; combination of grid construction,"Twelve Five" period, and in2014, Foshan in low voltage distribution network annual planning, the status of the distribution network to sort outChancheng introduced Chancheng with the status quo power, including the power supply area,the superior power and10kV lines, etc., analyzes the main problems exist Chanchengdistribution network, including power supply capacity, network architecture, operation leveland the built environment, to study the basic idea Chancheng distribution network planning,including the network structure and wiring10kV and10kV power cables overhead powerlines; analyzed the distribution network reconfiguration of some of the algorithm, areconstruction model based on genetic algorithms with a single network, with a distributionnetwork reliability test system IEEE-RBTS Bus4as an example, in the original distributionnetwork reliability is calculated by optimizing the changing of the network structure, improvethe reliability of the system, but also to verify the reasonableness of the algorithm; utilizationoptimization algorithm medium voltage distribution network reliability based network,combined Chancheng medium voltage distribution network wiring structure of the basic ideasand the planning of a typical power lines wiring requirements, using optimized networkwiring studied Chancheng area distribution network grid implementation strategy targets avariety of ways to change the status quo, such as the weak link in the network. Contactrelations combined with the existing power grid in order to Foshan Power Supply Bureautypical wiring for guidance, study2to3derivative typical wiring connection modes to guidethe transformation of the distribution network, and from the distribution power grid planningand design considerations put forward five species suggested ways and solutions:1) based onload forecasting, from not more than four feeder feeder groups to implement zoning power;2)from the feeder group select five typical wiring, which preferred two cable lines for a backup;3) wiring pattern by the "single radiation" transition to "two segmented two contact";4) clearline dry branch, a reasonable set of rings outlets and switch room and avoid branch ringnetwork;5) to comply with a typical wired network gradually promote the "two remote faultindicator+/feeder automation."...