Large grid active power real-time control method in restricted wind power state

Abstract

The invention relates to a large grid active power real time control method in a restricted wind power state, and belongs to the technical field of operation and control of electric systems. The method comprises the following steps: firstly obtaining the current restriction quantity of a wind power field by using a benchmark dynamo method or a theoretic estimation method according to wind speed data, acquired in real time, of the wind power field and relative parameters of a generator; and then establishing a model in active real time control by the system according to the minimum wind-abandoning principle, optimizing and solving the model by using a suggested solving algorithm to obtain the current maximum absorptive wind power quantity of the system and an optimal adjusting strategy of other water-fire generator systems, and interpolating the obtained adjusting strategy by using a difference value method so as to be compatible with the existing ACE (access control entry) order format. The method provided by the invention has the following advantages: a real-time control loop using the minimum wind-abandoning loss as a target is added between a real-time plan and the ACG (application control gateway) control, so as to implement the joint optimization scheduling of the wind power and the traditional unit through the wind power field wind-abandoning quantity obtained by real-time computation, so that the wind-abandoning electric quantity caused by the prediction error of wind power generation is maximally reduced, and to the accepting capability of the grid to the wind power is furthest improved while the economical efficiency of the grid operation is ensured.

Description

technical field [0001] The invention relates to a real-time control method for active power of a large power grid in a state of limited wind power, and belongs to the technical field of power system operation and control. Background technique [0002] The difference between large-scale wind power generation and traditional power generation is that the former has strong randomness, and the multi-time scale coordinated active power dispatching mode can effectively improve the ability of large power grids to absorb wind power. This scheduling mode decomposes the control into 4 phases: day-ahead planning, rolling planning, real-time scheduling and AGC. Through the coordination and optimization of "forward-looking and backward-looking" among various links, the deviation of wind power generation forecast and load forecast is eliminated step by step, so as to achieve the purpose of accommodating large-scale wind power. Wind power forecasting is the basis for multi-time scale coord...

AI Technical Summary

Problems solved by technology

The limited state of wind power leads to a considerable amount of wind curtailment losses

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