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Grid Frequency Change Evaluation Method and System Based on Photovoltaic Output Fluctuation

A technology for power grid frequency and output fluctuations, applied in photovoltaic power generation, electrical components, circuit devices, etc., can solve the problems of power system frequency stability and lack of systematic research

Active Publication Date: 2018-08-28
国网西藏电力有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there is a lack of systematic research on the frequency stability of power systems caused by large-scale photovoltaic grid integration.

Method used

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  • Grid Frequency Change Evaluation Method and System Based on Photovoltaic Output Fluctuation
  • Grid Frequency Change Evaluation Method and System Based on Photovoltaic Output Fluctuation
  • Grid Frequency Change Evaluation Method and System Based on Photovoltaic Output Fluctuation

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0047] see figure 1 , figure 1 It is a flowchart of a grid frequency change assessment method based on photovoltaic output fluctuation disclosed in the embodiment of this application.

[0048] Such as figure 1 As shown, the method includes:

[0049] Step S100, determining the output fluctuation of the photovoltaic power station;

[0050] Specifically, the output level of the photovoltaic power station fluctuates with time, and in this embodiment, the output fluctuation of the ph...

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Abstract

The invention discloses a photovoltaic output volatility-based grid frequency change estimation method and system. The method comprises the following steps: firstly, determining the output volatility of a photovoltaic power station to simulate a grid frequency change according to the output volatility; obtaining a numerical value of an index for balancing the grid frequency change; and finally determining the output level of the photovoltaic power station when the numerical value of the index exceeds a preset index threshold. The grid frequency change is simulated by the photovoltaic output volatility; the photovoltaic output level when the grid frequency change exceeds the limit can be obtained; and data reference is provided for subsequent guidance of photovoltaic grid connection.

Description

technical field [0001] The present application relates to the field of photovoltaic grid-connected technologies, and more specifically, to a method and system for evaluating grid frequency changes based on photovoltaic output fluctuations. Background technique [0002] With the continuous increase of energy demand and the increasing call for environmental protection, photovoltaic power generation has developed rapidly in recent years, and its proportion in power supply has continued to rise, making the interaction between photovoltaic power generation and power grid more and more complicated. With the increasingly stringent requirements of the power system for the reliability of photovoltaic power generation operation and domestic and foreign research institutions have conducted a lot of research and proposed many solutions, the understanding and solutions of related problems related to photovoltaic power generation grid-connected operation are also constantly improving. . ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/383H02J2203/20Y02E10/56
Inventor 小布穷措姆高海宾吴杰王真李琰陈占凤岳雷鲁小华苏媛媛魏林君卓嘎尼玛片多王炳强张志鹏格桑晋美次旦玉珍王阳王景田李玲张鹏飞董存刘宝升赵红噶毕艳秋曹坤茂张洋郄鑫刘增训张华刘超汤海雁张占奎
Owner 国网西藏电力有限公司