Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Electrical and Electronic Engineering | en_US |
| dc.contributor.advisor | Bu, Siqi (EEE) | en_US |
| dc.creator | Wang, Dingzhengyang | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/14522 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | en_US |
| dc.rights | All rights reserved | en_US |
| dc.title | Probabilistic power flow analysis of active distribution networks | en_US |
| dcterms.abstract | Due to the global depletion of fossil fuels and growing public awareness of environmental protection, Distributed Generation (DG) has become an important direction in the development of electric power systems. DG mainly consists of small, clean power generation systems with power ranging from a few kilowatts to 50MW, and the output of these DGs is uncertain when they are connected to the grid, unlike the output of conventional thermal power generators, which is stable. The output of these DGs is uncertain when they are actually connected to the grid, unlike the output of traditional thermal generators, which is stable. In addition, the asymmetry of the distribution system is becoming more and more serious due to the presence of asymmetrical loads such as electric locomotives, large arc furnaces, and non-full-phase distribution lines in modern distribution networks. Therefore, in order to analyse and study the asymmetry and uncertainty of the distribution network currents, it is necessary to study the three-phase current algorithms with more accurate calculation results. In this paper, the three-phase mathematical models of power components and DGs in distribution networks are described, several distribution network power flow algorithms are analysed, and several algorithms for calculating uncertainty are introduced. The main research contents of this paper are as follows. | en_US |
| dcterms.abstract | Study of three-phase asymmetrical distribution network power element modelling. A three-phase asymmetric model of distribution lines, transformers and loads for calculating three-phase asymmetric currents in distribution networks is investigated. Due to the asymmetry of distribution networks, the three-phase parameters of distribution lines and loads will become asymmetric again. Because of the asymmetry of the distribution network, the three-phase parameters of distribution lines and loads will become unsymmetrical. | en_US |
| dcterms.abstract | DG and energy storage device modelling study. To evaluate the effects of DG and energy storage devices on three-phase asymmetric currents in distribution networks, the output characteristics of the main DG and energy storage devices are studied, with reactive constant PQ-type nodes, current constant PI-type nodes, and voltage constant PV-type nodes, and then the three-phase asymmetric currents algorithm of distribution networks is established using the substitution of each node type into the distribution network. | en_US |
| dcterms.abstract | Research on three-phase asymmetric current algorithms for distribution networks. In calculating the three-phase asymmetric currents in distribution networks, Newton Raphson is used to calculate the radial asymmetric distribution networks, and the Newton Raphson algorithm has fast convergence speed and high reliability in calculating the three-phase asymmetric distribution networks. | en_US |
| dcterms.abstract | Investigation of the three-phase asymmetric power flow method for unknown distribution networks. The DG and energy storage devices and loads in the distribution network have certain uncertainties, and this paper introduces a Monte Carlo algorithm to establish a three-phase asymmetric tidal flow algorithm based on uncertainty. By analysing the examples, it can be seen that in a three-phase asymmetrical distribution network, the voltage level of the low-voltage side of the distribution network can be improved through rational planning of accessing DGs and energy storage devices, which can reduce the asymmetry of the distribution network and the three-phase voltage imbalance degree. | en_US |
| dcterms.extent | x, 86 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2023 | en_US |
| dcterms.educationalLevel | M.Sc. | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 8951.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.54 MB | Adobe PDF | View/Open |
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