Fengshui joint scheduling method considering the accumulation process of weather forecast uncertainty

Abstract

The present invention provides a geomantic hydropower joint dispatching method considering the accumulation process of weather forecast uncertainty, including establishing a geomantic hydropower long-term joint dispatching objective function; The hydropower station releases the flow constraint expression, and solves the long-term joint dispatching objective function of Fengshui; based on the fluctuation F of the combined output of Fengshui power generation 1 , Fengshui power generation joint output, hydropower discarded water conversion power F 2 F 3 Carry out Feng Shui joint scheduling. On the basis of considering the accumulative process of medium and long-term wind and runoff forecast uncertainty, the invention takes the minimum fluctuation of wind-water power generation combined output as one of the goals, and is based on the perspective of hydropower stations to meet the guaranteed output of hydropower stations and reduce waste as much as possible. Water is the second and third goals. Under the relevant operational constraints, the coordinated operation of Fengshui resources on a medium and long-term scale is realized.

Description

technical field [0001] The invention relates to the field of wind power control, in particular to a wind-water joint scheduling method considering the accumulation process of weather forecast uncertainty. Background technique [0002] The development and utilization of renewable energy is an important way to deal with global climate change and energy shortages, but at the same time, due to the volatility and uncontrollability of wind energy resources, the problem of wind power consumption has become increasingly prominent. According to statistics, from 2011 to 2015 The annual national average wind abandonment rate reached 13.4%, and in 2016 the national wind abandonment rate reached 17.1%. [0003] Hydropower and wind energy resources have good seasonal complementarity, and the storage capacity adjustment capacity of the reservoir and the rapid response characteristics of the hydropower unit enable the hydropower output to track and compensate the output change of wind power...

AI Technical Summary

Problems solved by technology

However, the significant diurnal fluctuations of wind power output may cause large diurnal differences in equivalent load, thereby increasing the system’s peak-shaving requirements and operating costs; at the same time, the storage capacity of hydropower stations cannot be adjusted in a short time scale. fully use

2) In terms of coordination goals, little attention has been paid to the self-benefits of hydropower

When hydropower compensates for wind power, it usually wastes too much water energy, forming a situation of "abandoned water compensation", making it impossible for hydropower itself to guarantee output

3) In the operation scenario, it is usually based on the hydropower, wind farm station or unit given in advance, and does not consider whether the corresponding hydropower and wind energy resources have a good complementary effect. The optimal power generation plan thus obtained may generate hydropower. "Under compensation" or "abandoned water compensation"

However, most existing studies use constant probability distribution or fuzzy parameters to represent uncertainty, but ignore the relationship between weather forecast uncertainty and forecast period

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