Voltage collapse point calculation method comprising wind power random fuzzy injection power system fluctuation
A technology of voltage collapse and power system, applied in the direction of system integration technology, information technology support system, instrument, etc.
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[0022] The present invention comprises the following steps:
[0023] 1. Stochastic fuzzy uncertainty modeling of wind power output
[0024] 1) Establish a random fuzzy uncertainty model of wind speed
[0025] According to the actual multi-year wind speed data, the probability distribution shape parameter k of the daily wind speed probability distribution parameter can be extracted using the triangular fuzzy variable ξ k =(1.14,1.75,3.64) means that the scale parameter c can adopt the trapezoidal fuzzy variable ξ c =(2.95, 4.40, 6.40, 8.22), the corresponding membership functions can be expressed by formulas (1) and (2) respectively:
[0026]
[0027]
[0028] According to the fuzzy and uncertain characteristics of daily wind speed probability distribution parameters extracted above and their membership functions, a random fuzzy and uncertain model of daily wind speed is established, and a parameter that satisfies Pos{} > 0 is extracted in the respective confidence inte...
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