农村电网规划常见问题（Common problems of rural power grid planning）.docVIP

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农村电网规划常见问题（Common problems of rural power grid planning）.doc

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农村电网规划常见问题（Common problems of rural power grid planning）

农村电网规划常见问题（Common problems of rural power grid planning） Chapter I the tasks and requirements of rural grid planning The task of rural grid planning Specifically, it can be divided into two tasks: 1) determine the specifications of future installations of the grid. 2) determine the location and time of adding new equipment to the grid. Usually in three stages: recent (1-5 years), middle (6-15 years), long term (16-35 years) Ii. Contents of planning 1) investigate and collect the current situation of power network, analyze existing problems, and make clear the focus of planning and transformation. 2) planned investigation and collecting area development plan for national economic sectors and the development and changes of peoples living electricity materials, partition calculate electricity load for the recent planning should be listed, year by year and the medium-term and long-term planning are listed the annual total load level. 3) according to the overall planning of the countryside and the development of power load, the annual electricity consumption level is analyzed. 4) analyze the situation of reactive power supply and reactive load in the planning area, conduct reactive power balance, reasonably arrange the location of reactive power supply, and determine the most economical compensation capacity. 5) research on rural grid layout planning and grid structure scheme Preparation of planning documents, including wiring diagrams and planning instructions of agricultural grid planning. Iii. Basic requirements of rural grid planning 1) the distribution proportion is appropriate, the capacity is abundant 2) the voltage support point is much 3) ensure the flexibility of system operation Iv. Technical requirements for rural grid planning: 1) voltage level. 2) power supply radius. 3) voltage quality. 4) the capacity ratio of main transformer and distribution transformer is 1:2.5; Power distribution transformer and power user capacity ratio is 1: (1.5-1.8). 5) transmissi