Large-scale photovoltaic power station and distribution grid harmonic wave cross-impact analysis model building method
A technology for interactive impact analysis and photovoltaic power plants, which is applied in the field of model modeling for the interaction of large-scale photovoltaic power plants and distribution network harmonics, and can solve problems affecting the safe and stable operation of distribution networks and photovoltaic power plants.
Active Publication Date: 2013-09-18
HUNAN UNIV
View PDF3 Cites 19 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The technical problem to be solved by the present invention is that because the harmonics of the photovoltaic power station have the particularity of high frequency and wide frequency range, it is easy to generate series and parallel resonance with the distribution network, and the harmonic voltage and current at the resona
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0059] figure 2 A modeling strategy for the harmonic interaction model of photovoltaic power plants and distribution networks. Among them, the temperature T and the irradiance S are used as external variables, that is, the input of the model, Output harmonic current for photovoltaic power plants. Among them, U dc is the DC side voltage of the PV inverter, Output harmonic voltage for photovoltaic inverter.
[0060] Firstly, the photovoltaic array engineering model is established, and the maximum power point voltage is calculated by the MPPT algorithm, and then the DC side voltage U of the photovoltaic inverter is obtained. dc ;Considering factors such as the dead zone effect and the modulation link, the output harmonic voltage of the photovoltaic inverter is divided into low-order and high-order two parts, which are calculated separately; on the basis of a single photovoltaic inverter model, the combined double-split The transformer builds the model of the 1MVA power ge...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more PUM
Login to view more Abstract
The invention discloses a large-scale photovoltaic power station and distribution grid harmonic wave cross-impact analysis model building method and belongs to the technical field of new energy power generation and transmission. The large-scale photovoltaic power station and distribution grid harmonic wave cross-impact analysis model building method is mainly used for analyzing harmonic wave interaction influence of a large-scale photovoltaic power station and a distribution grid. The large-scale photovoltaic power station adopts a power electronic device as a grid-connection interface and can fill a large amount of harmonic wave into a power grid inevitably, and by means of specificity of a photovoltaic inverter, the generated harmonic wave has the advantages of being wide in broadband, high in frequency and capable of generating series-parallel connection resonance with distributed capacitors of the power grid. A large-scale photovoltaic power station and distribution grid harmonic wave cross-impact analysis model is formed by a photovoltaic harmonic analysis model and a distribution grid equivalent circuit, the photovoltaic harmonic analysis model is used for analyzing power station harmonic wave output characteristics, and the distribution grid equivalent circuit is used for representing the distribution grid which the power grid is connected in. The large-scale photovoltaic power station and distribution grid harmonic wave cross-impact analysis model can provide a theoretical basis for issues of photovoltaic power station and distribution grid planning, harmonic wave estimation, estimation of photovoltaic power station accepting capability of the distribution grid, photovoltaic grid connection regulation formulation and the like.
Description
technical field [0001] The invention relates to the technical field of new energy power generation and power transmission, in particular to a method for modeling a large-scale photovoltaic power station and a distribution network harmonic interaction analysis model modeling method. Background technique [0002] In recent years, with the implementation of the "Golden Sun Demonstration Project", the solar energy industry will receive greater support in terms of policies, and China's photovoltaic industry is undergoing a process of rapid development. Photovoltaic power stations are developing towards large-scale and large-scale development. Several megawatt-level grid-connected photovoltaic power stations have started construction or operation in Qinghai, Gansu, Ningxia and other places. my country has also formulated corresponding grid-connected technical regulations, but the current large-scale photovoltaic power stations in China Still focus on engineering demonstration, main...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more Application Information
Patent Timeline
Login to view more IPC IPC(8): G06F19/00
CPCY02E60/00
Inventor 罗安谢宁徐欣慰周发云田园徐千鸣
Owner HUNAN UNIV
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Try Eureka
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap