An economic dispatch optimization method based on large-scale wind power grid-connected

A technology of economic scheduling and optimization method, which is applied in the direction of wind power generation, single-network parallel feeding arrangement, etc., and can solve the problems of wind power output such as large randomness, strong volatility, and difficulty in achieving ideals

Inactive Publication Date: 2016-12-07
JIANGSU UNIV
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Problems solved by technology

Due to the large randomness and strong volatility of wind power output, the current wind power output forecast is still difficult to achieve the desired effect, and the wind power power forecast error will exist for a long time, which puts forward higher requirements for the economic operation of the power system

Method used

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  • An economic dispatch optimization method based on large-scale wind power grid-connected
  • An economic dispatch optimization method based on large-scale wind power grid-connected
  • An economic dispatch optimization method based on large-scale wind power grid-connected

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Embodiment Construction

[0065] The solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0066] attached figure 1 Explain the characteristics of wind power output. The overestimated output and underestimated output of wind power present a staggered distribution. Since there are many factors that affect the overestimated output and underestimated output of wind power, such as: climate, season, wind power forecast level, etc., the overestimated output and underestimated output of wind power is uncertain;

[0067] attached figure 2 It is the flow chart of using energy storage system and backup system to deal with wind power fuzzy output, such as figure 2 As shown, when the actual output of the wind farm is higher than the predicted output, the energy storage is charged to reduce the wind farm’s curtailed wind volume. On the contrary, when the actual output of the wind farm is lower than the predicted outp...

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Abstract

The invention discloses an economical dispatching optimization method based on large-scale wind power integration. The method comprises the steps that 1, a wind power plant fuzzy output calculation model is established on the basis that a wind power pre-permeability calculation model is given and according to output prediction accuracy of a wind power plant; 2, a wind power plant energy storage cost calculation model and a wind power plant standby system cost calculation model are established by introducing a conversion coefficient; 3, based on regulating characteristics of an energy storage system and a standby system, a wind power plant wind curtailment compensation cost model and a wind power plant insufficient output penalty cost calculation cost are established; 4, a wind power integration economical dispatching model is optimized through combination with a thermal power generating unit output cost model. The dispatching model established through the method optimizes the conversion coefficient alpha, so that the saved cost of the system is maximized, and economy of system operation is improved; meanwhile, the wind curtailment volume is reduced, and the wind power accepting capacity of a power grid is improved.

Description

technical field [0001] The invention relates to the field of power system operation and scheduling, in particular to an optimization method for large-scale wind power grid-connected economic scheduling based on wind power fuzzy output. Background technique [0002] Wind power is one of the most promising renewable energy sources in the world. At present, wind power development is mainly based on the grid-connected operation of large-scale wind farms. In China, while wind power is growing explosively, wind power output is limited in some areas and large-scale off-grid accidents of wind turbines occur from time to time. Grid-connected consumption and safe operation have become the main bottlenecks in the development of wind power in China. Therefore, it is of great significance to study the relevant aspects of the economic dispatch of large-scale wind power grid-connected power systems. Due to the large randomness and strong volatility of wind power output, the current wind ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46
CPCH02J3/46Y02E10/76
Inventor 于东孙欣徐勤马群沈风
Owner JIANGSU UNIV
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