Plant-network coordination method for exciting combined operation of wind power plant and pumped storage power station and combined dispatching method thereof

A pumped-storage power station, plant-grid coordination technology, applied in wind power generation, energy industry, single-grid parallel feeding arrangement, etc., can solve the problem that the joint dispatching strategy of wind power-pumped-storage power station is difficult to apply directly.

Inactive Publication Date: 2020-07-17
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since my country has not yet established a complete clean energy power market, the power grid should fully consume wind power while ensuring its own safety and stabi...

Method used

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  • Plant-network coordination method for exciting combined operation of wind power plant and pumped storage power station and combined dispatching method thereof
  • Plant-network coordination method for exciting combined operation of wind power plant and pumped storage power station and combined dispatching method thereof
  • Plant-network coordination method for exciting combined operation of wind power plant and pumped storage power station and combined dispatching method thereof

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Embodiment 1

[0120] Embodiment 1, technical framework

[0121] The present invention aims to explore a combined dispatching strategy of wind power and pumped storage power station that can not only be applicable to the operation status of my country's power grid, but also fully consider the operating characteristics of the pumped storage power station, so as to improve the controllability of wind power and reduce the impact on the system. Negative Effects. First of all, the present invention proposes a plant-network coordination mechanism to encourage the combined operation of wind farms and pumped storage power stations based on the stable operation of the power grid and the needs of power generators to increase revenues. The actual total output curve of the energy storage power station consortium matches the submitted planned output curve, improving the dispatchability of wind power. On this basis, the present invention adopts scene analysis technology to model and analyze the uncertaint...

Embodiment 2

[0122] Embodiment 2. A plant-network coordination mechanism that promotes the joint operation of wind farms and pumped storage power stations

[0123] This embodiment proposes a plant-network coordination mechanism that promotes the joint operation of wind farms and pumped storage power plants. The mechanism mainly includes the following steps:

[0124] (1) The wind farm predicts the output curve of the next day according to the historical operation data or the weather forecast data of the next day, and reports it to the affiliated power generation company;

[0125] (2) The power generation company comprehensively considers the grid electricity price, the technical characteristics of the pumped storage power station (reservoir capacity limit, pumped storage machine assembly capacity, pumped storage unit start-up and shutdown costs, etc.), the possible deviation between the actual output of wind power and the predicted output and other factors, determine the output plan of the ...

Embodiment 3

[0131] Embodiment 3, wind power uncertainty modeling

[0132] Wind power output has a certain randomness. Due to the limitation of the current wind power forecasting technology level, there is always a certain deviation between the predicted value of wind power output and the actual value. Therefore, the present invention uses scene analysis technology to analyze the wind power output. Uncertainty modeling analysis.

[0133] (1) Scene generation

[0134] Assuming that the forecasted wind power output sequence in the dispatch period is At any time period t, its prediction error obeys the normal distribution N(μ,σ 2 ), where μ is the mathematical expectation, σ is the standard deviation, and μ=0, The traditional Monte Carlo (MC) method needs a very large sampling scale to obtain good calculation results, but too many sampling scenarios will greatly affect the solution efficiency. Therefore, the present invention adopts the Latin Hypercube Sampling (LatinHypercube Sampling,...

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Abstract

The invention discloses a plant network coordination method for exciting the combined operation of a wind power plant and a pumped storage power station and a combined dispatching method thereof. Themethod comprises the steps of firstly, providing a plant-network coordination mechanism for exciting the combined operation of the wind power plant and the pumped storage power station from the requirements of stable operation of a power grid and income improvement of a power generator; on the basis, carrying out modeling analysis on the uncertainty of wind power output, fully considering the operation characteristics of the pumped storage power station, constructing a wind power-pumped storage power station coordinated operation mixed integer programming model with the maximum complex power generation income as the target, and then using an optimization solver for solving the model. By the adoption of the method, the combined dispatching of wind power and pumped storage can effectively restrain the output fluctuation of the wind power, the risk of wind curtailment of a power grid is greatly reduced, and meanwhile the power generation income of a wind power plant-pumped storage power station combined body is remarkably increased.

Description

technical field [0001] The invention relates to a field of energy technology, in particular to a joint dispatching method of a wind farm and a pumped storage power station based on a plant-network coordination method. Background technique [0002] Under the development model of offshore wind power bases in the eastern region, the construction of wind farms is very concentrated. Such a large-scale centralized grid connection of wind power will lead to a greater demand for peak regulation in some areas of the power grid, which greatly increases the risk of wind curtailment and load shedding of the power grid. In the case of insufficient peak-shaving capacity of the power system, the scale of wind power grid connection will also be limited. Although some studies have optimized the inter-regional and inter-provincial connection line plan, reduced the load peak-valley difference of the provincial grid, and improved the clean energy consumption space of the provincial grid. Howev...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02J3/38
CPCH02J3/46Y02E10/76Y02P80/20Y02A30/00
Inventor 苏承国卢璐原文林吴洋周彬彬
Owner ZHENGZHOU UNIV
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