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Alternating current and direct current hybrid distributed renewable energy system test scene simulation method

A renewable energy, AC and DC hybrid technology, applied in the direction of electrical testing/monitoring, measuring electricity, measuring devices, etc., can solve problems such as complex calculation process

Active Publication Date: 2018-12-07
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods all need to use optimization algorithms to optimize the existing data, and the calculation process is still relatively complicated.

Method used

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  • Alternating current and direct current hybrid distributed renewable energy system test scene simulation method
  • Alternating current and direct current hybrid distributed renewable energy system test scene simulation method
  • Alternating current and direct current hybrid distributed renewable energy system test scene simulation method

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Embodiment Construction

[0084] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0085] The test scene simulation method of the AC-DC mixed distributed renewable energy system of the present invention includes steps such as scene combination, scene window selection, probability distance calculation, and scene reduction:

[0086] The process of the present invention is as figure 1 Shown:

[0087] First initialize as follows:

[0088] Assume that the known photovoltaic power probability density function is p pv , the known wind power probability density function is p wt , the known probability density function of AC load is p acl , the known DC load probability density function is p dcl ; The known photovoltaic power prediction error is e pv , the known wind power prediction error is e wt , the known AC load forecasting error is e acl , the known DC load forecasting error is e dcl . According to the photovoltaic pow...

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Abstract

The invention relates to an alternating current and direct current hybrid distributed renewable energy system test scene simulation method which comprises four steps of scene combination, scene windowselection, probability distance calculation and scene reduction. Before scene combination, firstly, initialization is carried out. The scene combination forms an upper limit extreme scene and a lowerlimit extreme scene. In the scene window selection, a window number proportion of test scenes which need to be selected out is determined, i.e., in a case that a total sampling frequency is definite,the number of the test scenes which need to be selected out is indirectly determined. The probability distance calculation is that probability distances of all scenes are calculated so as to providevisual bases for the scene reduction. The scene reduction is that photovoltaic power values, wind power values, alternating current load values and direct current load values of normal scenes in a current time period are calculated so as to determine the normal scenes in the current time period.

Description

technical field [0001] The invention relates to a test scene simulation method for a distributed renewable energy system. Background technique [0002] my country's distributed renewable energy is growing rapidly, but currently there are many AC-DC conversion links in renewable energy access technology, which affects the convenience of access and reduces efficiency. The AC-DC hybrid system based on power electronic conversion devices can integrate distributed renewable energy at multiple AC-DC voltage levels, increase control capabilities, and achieve more flexible and secure access. At the same time, it can realize flexible networking of the system and complement each other in a wider range It improves the full consumption and efficient utilization of distributed renewable energy. Therefore, the AC-DC mixed distributed renewable energy system has become one of the important forms of the future power grid. [0003] Since the system architecture, system analysis, design and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q50/06G05B23/02G01R31/00
CPCG05B23/02G06Q50/06G01R31/00G06F30/20
Inventor 邓卫裴玮张学孔力李鲁阳黄强付慧潘志新李强黄地戴康
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI