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Method for analyzing contribution of intermittent energy source based on time domain and constellation effect

A cluster effect and intermittent technology, applied in wind power generation, special data processing applications, instruments, etc., can solve problems such as weak purpose, unclear power plants and power grids, etc.

Inactive Publication Date: 2014-11-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0004] At present, most of the volatility analysis of intermittent energy sources focuses on the long-term and short-term volatility analysis, and the long-term and short-term power fluctuation characteristics are obtained. However, which aspect of the power plant and the power grid does this volatility bring? The impact is not clear, it can be said that the purpose is not strong
Moreover, the effect of the cluster effect on the overall electric field output is ignored

Method used

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  • Method for analyzing contribution of intermittent energy source based on time domain and constellation effect
  • Method for analyzing contribution of intermittent energy source based on time domain and constellation effect

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Embodiment

[0138] 1. Wind power volatility analysis in Hainan

[0139] Based on the actual operation data of the main wind farms in Hainan, the change law of the cluster effect is analyzed and studied. The geographical locations and relative distances of the five wind farms are as follows: image 3 shown. Wenchang Wind Farm (WF1) is located on the northeast coast, Eman Wind Power Phase I and Phase II (WF2 and WF3) are adjacent to the northwest coast, and WF1 and WF2 are 200km away; Sigeng and Gancheng Wind Farms (WF4 and WF5) are located in In the two towns along the southwest coast, the distance between WF3 and WF4 is 120km; the distance between WF1 and WF5 is 300km. Each wind farm has a rated capacity of 49.5 megawatts (MW). The data used in the study are power data at 5-minute intervals from 2011 to 2012.

[0140] (1) The time scale volatility of the planning level of the wind farm

[0141] (11) Annual volatility

[0142] The annual utilization hours of wind power refers to the ...

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Abstract

The invention discloses a method for analyzing the contribution of an intermittent energy source based on time domain and a constellation effect, belonging to the technical field of new energy source generation and grid connection. The method comprises the following steps of: counting real-time contribution data of an intermittent energy source wind power station, and performing volatility analysis on the contribution of the intermittent energy source wind power station from three levels of time scales; calculating the constellation effect of an intermittent energy source wind power station cluster; and determining relevance and complementary among the intermittent energy source wind power stations according to the constellation effect among the intermittent energy source wind power stations. According to the method, the volatility analysis is performed on the contribution from different levels of time scales, and an adjustment basis is provided for the wind power station; based on the running of levels of time scales, the current dispatching, pitch peak and spare capacity of a machine set are calculated according to six divided volatility types; and constellation effect indexes are overfitted by a hybrid Gaussian distribution method and introduced into a confidence interval, and the constellation effect intensities at different installed capacities are effectively calculated.

Description

technical field [0001] The invention belongs to the technical field of grid connection of new energy power generation, and in particular relates to a method for analyzing intermittent energy output based on time domain and cluster effect. Background technique [0002] Renewable energy sources such as wind power and photovoltaics have the characteristics of intermittency, volatility and randomness, so they are also called intermittent energy sources. Because intermittency dictates the unpredictable volatility of renewable energy, which is what connects intermittent energy to the grid and has an impact on it. When the penetration rate of intermittent energy reaches a certain level, this uncontrollable power fluctuation will have an adverse impact on the balance of active and reactive power in the grid, affecting not only the voltage level and frequency stability of the grid, but also the overall Network backup and peaking capacity arrangements. Due to the lack of comprehensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46G06F19/00
CPCY02E10/76
Inventor 赵冬梅尹颢涵王建锋张虹金小明魏国清胡剑琛
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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