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Modeling method considering uncertainty and taking distributed power supply as harmonic source

A distributed power supply, uncertain technology, applied in resources, computing, photovoltaic power generation, etc., can solve problems that cannot fully reflect the actual situation

Inactive Publication Date: 2017-09-08
TIANJIN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional deterministic modeling method of distributed power generation as a harmonic source fails to take these uncertain factors into account and cannot fully reflect the actual situation

Method used

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  • Modeling method considering uncertainty and taking distributed power supply as harmonic source
  • Modeling method considering uncertainty and taking distributed power supply as harmonic source
  • Modeling method considering uncertainty and taking distributed power supply as harmonic source

Examples

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Embodiment Construction

[0049] 1. Taking the CNPV-230M photovoltaic power generation system as an example, establish its output uncertainty model:

[0050] (1) For a specific photovoltaic installation site, the photovoltaic intensity in one day is obtained according to the meteorological forecast data, such as figure 1 shown;

[0051] (2) Taking the meteorological data at 11:00 am as the research object, the light intensity variation range at this time is [252,308]kW / m 2 ;

[0052] (3) Calculating the change interval of the photovoltaic power generation system output from the photovoltaic power output function, P PV =ηA PV G T [1-0.005(T a +CG T -25)], n is the photoelectric conversion efficiency value 16% of photovoltaic array in the formula, A PV Take the value of 100m for the photovoltaic array area 2 , G T Take the value [252,308]kW / m for the light intensity 2 ,T a The value of ambient temperature is 35°C, the value of C is 0.03, and the output range of the photovoltaic array is calcul...

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Abstract

The invention relates to a modeling method considering uncertainty and taking a distributed power supply as a harmonic source. The modeling method comprises three parts: 1, establishment of a photovoltaic power generation system output uncertainty model; 2, establishment of a wind power generation system output uncertainty model; and 3, establishment of a harmonic source constant-current source model considering uncertainty, wherein according to the modeling ways of the photovoltaic power generation system and wind power generation system uncertainty output in the first part and the second part, the node injection power of photovoltaic and wind turbine grid-connection nodes is represented by a form of uncertain quantity in a unified manner; the voltage value of each node is calculated through a three-phase fundamental wave power flow affine algorithm, and then the current value of a nonlinear load node is further solved; and the amplitude and phase angle of each harmonic current are solved according to the fundamental wave current value and the harmonic source typical spectrum, so as to obtain a constant-current source uncertainty model of the harmonic source.

Description

technical field [0001] The invention relates to the field of modeling of distributed power as a harmonic source in a power system, in particular to the modeling of distributed power as a harmonic source considering uncertain factors. [0002] technical background [0003] Distributed power generation refers to a small power generation system configured at the user end or near the power consumption site, which has the advantages of less investment, small footprint, short construction period, and environmental protection. Distributed power generation mostly uses renewable energy such as wind energy and solar energy to generate electricity. These renewable energy sources are easily affected by uncertain factors such as weather, so the output power of distributed power is random and volatile; the active output of distributed power It is closely related to the harmonic content of the grid-connected current, and the uncertainty of the node power will have a great impact on the harm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38G06Q10/06G06Q50/06
CPCG06Q10/06375G06Q10/067G06Q50/06H02J3/382H02J3/383H02J3/386H02J2203/20Y02E10/56Y02E10/76Y04S10/50
Inventor 王守相刘响
Owner TIANJIN UNIV
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