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A method for intraday joint optimal dispatch of regional small hydropower and wind power

A technology of joint optimization and scheduling methods, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as grid scheduling, control uncertainty, and no obvious progress in accuracy

Active Publication Date: 2018-01-16
STATE GRID CORP OF CHINA +1
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  • Application Information

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Problems solved by technology

At present, although there are many studies on wind power forecasting, there has been no significant progress in accuracy, which brings great uncertainty to the dispatching and control of the power grid.

Method used

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  • A method for intraday joint optimal dispatch of regional small hydropower and wind power
  • A method for intraday joint optimal dispatch of regional small hydropower and wind power
  • A method for intraday joint optimal dispatch of regional small hydropower and wind power

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with the drawings and specific embodiments: figure 1 As shown, the intra-day joint optimal dispatch method of regional small hydropower and wind power according to the present invention includes the following steps:

[0044] Step 1: Read data, obtain system parameters, historical data, and forecast data from the grid database; the system parameters include network connection relationships, relevant parameters of each node, transformer, and transmission line; the historical data include historical wind power 1. Load forecast data, wind power actual output data, actual load power data; said forecast data includes wind power forecast data, load forecast data and hydropower output forecast data;

[0045] Step 2: Establish a model to establish a daily joint optimization operation opportunity constraint model for regional small hydropower and wind power. The establishment of the model includes two parts. The fi...

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Abstract

A regional small hydropower and wind power day combined optimization and dispatching method includes the following steps of (1) reading data, wherein system parameters are obtained from a power grid database; (2) building a model, wherein a chance constraint model for regional small hydropower and wind power day combined optimization and dispatching is built and comprises a target function and constraint conditions, and the constraint conditions comprise wind power exerting constraint, electricity generation constraint of a hydropower unit each day and starting and stopping frequency constraint of the hydropower unit each dray; (3) converting the model, wherein a statistics analysis method is adopted, historical data obtained from the step (1) are summed and analyzed, a confidence interval of predicated wind power exerting is obtained, the lower limit of the confidence interval serves as wind power exerting, and the chance constraint model built in the step (2) is converted into a deterministic model; (4) carrying out resolution, wherein the deterministic model obtained in the step (3) is solved through a dynamic programming method according to the system parameters and predication data obtained in the step (1).

Description

Technical field [0001] The invention relates to the field of power system dispatching operation, in particular to a method for intraday joint optimization dispatching of regional small hydropower and wind power, and belongs to the technical field. Background technique [0002] Regional small hydropower and wind power are generally connected to the user side, which can not only effectively use wind and hydropower resources, but also compensate the active and reactive power of the load on the spot, reducing the demand for active and reactive power on the grid, thereby reducing Distribution network loss is the focus of the future development of renewable energy. Wind power has volatility and randomness, which will have an impact on the stability of the power system. Although the impact of distributed wind power on the grid is smaller than that of large wind farms, it can not be ignored; small hydropower has a smaller capacity and overcomes the seasonal water volume of rivers. The a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46
CPCH02J3/381H02J3/386H02J3/46H02J2203/20Y02E10/76
Inventor 叶正程文青郑玲王周虹
Owner STATE GRID CORP OF CHINA
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