A wind-water combined scheduling method considering a meteorological forecast uncertainty accumulation process

A technology of uncertainty and weather forecasting, applied in climate change adaptation, data processing applications, instruments, etc., can solve the problems of increasing system peak shaving requirements and operating costs, few hydropower self-benefits, waste of water energy, etc.

CN109726929AActive Publication Date: 2019-05-07ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-05-07

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Abstract

The invention provides a wind-water combined scheduling method considering a meteorological forecast uncertainty accumulation process. The method comprises the steps of establishing a wind-water medium-and-long-term combined scheduling objective function; Based on a hydropower station reservoir capacity deterministic equivalence class, a hydropower station output constraint expression, a hydropower station power generation flow constraint expression and a hydropower station discharge flow constraint expression, solving a wind-water medium-and-long-term combined dispatching objective function;And performing wind-water combined scheduling based on the solved fluctuation F1 of the wind-water power generation combined output, the converted electric quantity F2 of water and electricity discarding in the wind-water power generation combined output and the output F3 of the hydropower station in the wind-water power generation combined output. Medium and long term wind is considered; whereinon the basis of the runoff forecasting uncertainty accumulation process, the minimum fluctuation of the wind-water power generation combined output is taken as a target I, and on the basis of the angle of the hydropower station, the purpose II is that the water abandoning is reduced as much as possible while the guaranteed output of the hydropower station is met; and 3, under the related operationconstraints, the coordinated operation of wind water resources on the medium-long-term scale is realized.
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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...

Examples

Embodiment Construction

[0094] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0095] The invention discloses a wind-water joint scheduling method considering the accumulation process of weather forecast uncertainty, which includes the following steps:

[0096] S1. Taking the minimum fluctuation of the joint output of wind and water power generation, the minimum water waste of hydropower in the joint output of wind and water power generation, and the guarantee of the output of the hydropower station in the joint output of wind and water power generation as the goal, establish the long-term joint scheduling objective function of wind and water:

[0097]

[0098] in, E. t-s (P wk.t ) represents the output expectation of the kth wind farm in the (t-1,t) period based on the forecast wind speed of the kth wind farm in the future (t-1,t) period released at time s, P wk.t Indicates the actual output of the kth wind farm in the (t-1,t) per...