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

A technology of maximum active power and active power, applied in wind power generation, single-grid parallel feeding arrangement, etc., can solve problems such as wind abandonment loss

Active Publication Date: 2012-07-04
TSINGHUA UNIV +1
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Problems solved by technology

The limited state of wind power leads to a c

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

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[0042] The present invention proposes a real-time control method of large power grid active power under the condition of limited wind power, the flow chart of which is as follows image 3 As shown, the data interaction mode between the dispatch center and the power plant is as follows figure 2 shown. This method comprises the following steps:

[0043] (1) Calculate the maximum active power of the wind farm

[0044] Accurately obtaining the limited amount of active power of wind farms is the key to realize the real-time control method of active power of large power grid. Before calculating the limited amount of active power of wind farms, the maximum active power of each wind farm should be calculated first. There are two methods for calculating the maximum active power of a wind farm. The first method is: divide the wind farm into multiple control areas according to geographical location, and set one or more benchmark wind turbines in each control area. The wind turbine i...

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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...

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Application Information

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IPC IPC(8): H02J3/38
CPCY02E10/763Y02E10/76
Inventor 吴文传郑太一张伯明陈建华王国春孙宏斌郭庆来
Owner TSINGHUA UNIV
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