Kunming City High Voltage Power Supply Capacity

After the construction and rebuilding of Kunming city electrical network, the network scale expanded to certain degree in recent years and the number of primary devices also increased. Although its power supply ability, the power supply quality, the power supply reliability, as well as the customer service level all have been enhanced, but systemic analysis on the electrical network power supply ability and the reliability the has not been made., some hidden dangers of power supply has not been objectively understood, so it is unable to propose reasonable and scientific suggestion for the planning of electrical network. And there is still certain disparity to the request of Southern Power Grid of China.Therefore it is necessary to quantify power supply ability, to find weak factor of electrical network under the new electrical network scale and the new electrical network wire table parameter and to give proper solution in the next plan. Carrying on the evaluation of power supply ability to the Kunming city electrical network will strengthen the electrical network plan, provide the scientific basis for the electrical network transformation. And make the corresponding contribution to the entire Southern Power Grid of China security and stability.This article carries on the detailed analysis and the appraisal to the high-voltage of Kunming city power supply ability, discovers weak factors affects its power supply ability, main works have been done are as follows:(1) In order to macroscopic analyzes the power supply ability of Kunming electrical network, analysis of load development tendency and the demand quantity of various industry electricity of Kunming electrical network in the future several years corresponding is done.(2) Detailed analysis of high-voltage network in Kunming electrical network has been carried on at present situation, including the configuration, high pressure 220kVtransformer substation and line condition, 110kV transformer substation and line condition as well as largest supply ability under largest load in 2006．(3) Under the abundant big load level, as well as 1．2 and 1．4 times of that, the powerflow, N-1 and short circuit computation are carried on, has been carried on. Comprehensive analysis to the high-voltage power supply ability is done.(4) By introducing the fuzzy processing method, each factor fuzzy quantification conclusion and fuzzy quantification conclusion of the entire city electrical network power supply ability are obtained.The present city electrical network evaluation only limits to the power supply ability evaluation, complete city electrical network evaluation also should include the investing and delivers evaluations, namely the economy evaluation. It is believed that in the foundation of power supply ability evaluation, the Kunming power supply bureau may gradually carry on the economical appraisal work and guarantee that the next plan work will be performed smoothly, thus modernization and the scientific management of city electrical network will be enhanced.