Fast wind power capacity reliability calculating method based on reliability function

Abstract

The invention relates to a fast wind power capacity reliability calculating method based on a reliability function. The fast wind power capacity reliability calculating method comprises the following steps: 1) acquiring capacity and forced outage rate of each generator unit in an electrical power system; 2) calculating a unit outage capacity table in the electrical power system; 3) calculating the reliability function of the system; 4) acquiring a hour-class load curve in an assessment target year, a total installed capacity of a wind farm in the electrical power system, and a hour-class wind power output curve in the assessment target year; 5) setting an initial value of wind power capacity reliability; 6) calculating a weighting factor for each hour; 7) calculating wind power capacity reliability in current iteration; 8) according to a wind power capacity reliability result obtained in the current iteration and a capacity reliability result in last iteration, judging whether the iteration is convergent, if so, determining that the current iteration is the wind power capacity reliability result, otherwise, returning to the step 6). The fast wind power capacity reliability calculating method is relatively small in calculation error; by the fast wind power capacity reliability calculating method, the wind power capacity reliability can be accurately calculated in various electrical power systems and under various wind power conditions.

Description

technical field [0001] The invention relates to the field of power system analysis, in particular to a fast calculation method of wind power capacity reliability based on reliability function. Background technique [0002] Generally, wind power output has the characteristics of strong randomness, violent fluctuations, and difficult control of output. Compared with conventional units such as hydropower and thermal power, wind turbines cannot provide power generation capacity equivalent to their capacity at any time, so they cannot be treated equally with conventional units in power planning. The concept of wind power capacity credibility describes the capacity of conventional wind turbines that can be replaced by wind turbines under the premise of the same reliability. The reliability of wind power capacity builds a bridge between the randomness of wind power and the traditional power planning model, making it possible for wind power that is difficult to control and includes...

AI Technical Summary

Problems solved by technology

For this reason, some scholars have proposed the peak load average load rate method and some empirical formulas, but these calculation methods have large calculation errors and harsh assumptions, and are difficult to be widely used in the calculation and analysis of large-scale actual power systems

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