Power grid vulnerability evaluation method under high-proportion renewable energy source access

A renewable energy, high-proportion technology, applied in the field of power systems, which can solve problems such as single evaluation angle

Active Publication Date: 2020-01-17
BINZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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Problems solved by technology

[0005] Aiming at the single evaluation angle of the existing grid vulnerability assessment technology and the impact of the high proportion of renewable energy access on the existing vulnerabilit

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  • Power grid vulnerability evaluation method under high-proportion renewable energy source access
  • Power grid vulnerability evaluation method under high-proportion renewable energy source access
  • Power grid vulnerability evaluation method under high-proportion renewable energy source access

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Embodiment Construction

[0091] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0092] Such as figure 1 As shown, a grid vulnerability assessment method under a high proportion of renewable energy access, according to the grid vulnerability assessment mechanism, grid vulnerability assessment index set, and component vulnerability assessment based on DEAHP, proposes a method for renewable energy grid integration. Power grid vulnerability time series evaluation index; when applied to the power grid in specific target areas, the fuzzy C-means clustering algorithm is used to screen and cluster power generation scenarios, and a multi-scenario time series distribution...

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Abstract

The invention discloses a power grid vulnerability evaluation method under high-proportion renewable energy access, and the method comprises the steps: carrying out the clustering of high-proportion renewable energy output data of a target region power grid through employing a fuzzy C-means clustering algorithm through employing a multi-scene technology, and obtaining a multi-scene time sequence distribution model of high-proportion renewable energy output; evaluating element vulnerability by using a DEAHP-based vulnerability index system in each typical scene to obtain a vulnerability time sequence evaluation index changing along with renewable energy output change, so that the fluctuation degree and the real-time operation condition of node vulnerability characteristics are reflected. The idea of weighted entropy is introduced, and the static evaluation model of each time section is linearly weighted and aggregated by using a time sequence weighting vector so as to comprehensively consider the fluctuation characteristics and the equilibrium degree of node vulnerability under all typical time sequence scenes. The combination of typical scene probabilistic and vulnerability evaluation time sequence is realized, and the vulnerability of each node in the network is evaluated statically, dynamically and comprehensively, so that the evaluation result better conforms to the actual operation of the power grid.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a method and equipment for assessing the vulnerability of a power grid under the access of a high proportion of renewable energy. Background technique [0002] Wind power and photovoltaics are currently the most mature renewable energy power generation technologies. However, these two types of power sources are highly volatile and random, and cannot be stored or controlled. They have different characteristics in different time scales and different spatial ranges. volatility characteristics. These unfavorable factors may lead to adverse effects on the level of power quality, adequacy of power transmission, and continuity of power supply after the integration of renewable energy into the grid, greatly increasing the risk of safe and stable operation of the power grid. At the same time, when the power grid accepts a high proportion of renewable energy, due to its intermittent and rando...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06K9/62G06Q50/06
CPCG06Q10/06393G06Q50/06G06F18/23213Y02P90/82
Inventor 刘吉龙杜明田张海诚高红梅王鹏举宋曙光李丽丽王波杨洪波张君
Owner BINZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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