The effect of dispersed generation on power quality in distribution system

Doležal, Jaroslav; Santarius, Pavel; Tlustý, Josef; Valouch, Viktor; Vybiralik, Frantisek

doi:10.1109/qsepds.2003.159821

Cited by 21 publications

(18 citation statements)

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“…Technical studies of dispersed generation systems prove low power quality issues of these systems such as voltage fluctuation and flicker or high harmonic contents of the system current [1][2].…”

Section: Power Quality Problems Of Dg Unitsmentioning

confidence: 99%

Hybrid Filter Applications for Power Quality Improvement of Power Distribution Networks Utilizing Renewable Energies

Ahrabian

Shahnia

Haque

2006

2006 IEEE International Symposium on Industrial Electronics

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Abstract-A hybrid filter constructed of a shunt active filter and distributed passive filters used for power quality improvement in dispersed generation system is presented. The distribution system consists of several kinds of renewable energies as DG units where the power quality problems due to dispersed generation LV systems are introduced and the necessity of using hybrid filters instead of active or passive filters alone are discussed. The simulations are done with PSCAD/EMTDC for a distribution system with dynamic nonlinear loads and wind turbines, photovoltaic cells and diesel generators and several dynamic nonlinear load without any filters, with usage of just shunt active filter or passive filters and the hybrid filter structure, introduced in the paper. Studying and comparing the waveforms, harmonic contents and THD of the system current with different filter structures mentioned, proves power quality improvement by the applied hybrid filter.

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Section: Power Quality Problems Of Dg Unitsmentioning

confidence: 99%

Hybrid Filter Applications for Power Quality Improvement of Power Distribution Networks Utilizing Renewable Energies

Ahrabian

Shahnia

Haque

2006

2006 IEEE International Symposium on Industrial Electronics

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“…The introduction of microgrid raises the possibility that the distribution circuit can be energized from the load side. Microgrid in parallel with the power grid has effectted voltage、line flow、line current、power quality、 relay protection and network reliability at the PCC [7][8] . The effect depends on the distribution circuit type, the location and capacity of PCC, load characteristics of microgrid and so on [9] .…”

Section: Introduction (Heading 1)mentioning

confidence: 99%

Preliminary study on the technical requirements of the grid-connected microgrid

Yang

Jian

Liu

et al. 2011

2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT)

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Based on existing domestic and international standards and norms, this paper conducts a preliminary study on the technical requirements as proposed from the perspective of grid on microgrids during their grid-connecting, grid-connection operation and islanding processes. The basic principles and gridconnecting norm of microgrid grid-connection is proposed, and the requirements of the access point, capacity of access and access schemes are presented based on the considerations of reliability of distribution network. The issues caused by microgrids grid-connection, such as power quality, power control, voltage regulation, relay protection, communication, monitoring, energy metering and so on are analyzed in detail. The mode of the Microgrid disconnection has been divided into intention and unintention islanding types, and the principle of region islanding and disconnection requirements of the accident islanding mode are stressed. The analysis result of the key issues of grid-connected microgrid can be used as an useful foundation for the development of standards of microgrid grid-connected in the future.

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“…allows to generate part of the required energy closer to the places of consumption, improving quality levels and minimizing the investments costs associated with of transmission and distribution systems [1]. In general terms, the development of DG plants aims at improving environmental aspects and quality of energy (uninterrupted provision of electrical energy with suitable voltage level, current, frequency, amongst others) [1][2][3]. These generation types can benefit from a decision-support tool able to assist decision making in the scope of a project of installation of DG plants.…”

Section: Introductionmentioning

confidence: 99%

A probabilistic methodology for distributed generation location in isolated electrical service area

Khodr¹,

Silva²,

Vale³

et al. 2010

Electric Power Systems Research

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A B S T R A C TDistributed generation unlike centralized electrical generation aims to generate electrical energy on small scale as near as possible to load centers, interchanging electric power with the network. This work presents a probabilistic methodology conceived to assist the electric system planning engineers in the selection of the distributed generation location, taking into account the hourly load changes or the daily load cycle. The hourly load centers, for each of the different hourly load scenarios, are calculated deter-ministically. These location points, properly weighted according to their load magnitude, are used to calculate the best fit probability distribution. This distribution is used to determine the maximum likeli-hood perimeter of the area where each source distributed generation point should preferably be located by the planning engineers. This takes into account, for example, the availability and the cost of the land lots, which are factors of special relevance in urban areas, as well as several obstacles important for the final selection of the candidates of the distributed generation points. The proposed methodology has been applied to a real case, assuming three different bivariate probability distributions: the Gaussian distribu-tion, a bivariate version of Freund's exponential distribution and the Weibull probability distribution. The methodology algorithm has been programmed in MATLAB. Results are presented and discussed for the application of the methodology to a realistic case and demonstrate the ability of the proposed methodol-ogy for efficiently handling the determination of the best location of the distributed generation and their corresponding distribution networks. K e y w o r d sDistributed generation, Probabilistic methodology, Source location

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The effect of dispersed generation on power quality in distribution system

Cited by 21 publications

References 0 publications

Hybrid Filter Applications for Power Quality Improvement of Power Distribution Networks Utilizing Renewable Energies

Hybrid Filter Applications for Power Quality Improvement of Power Distribution Networks Utilizing Renewable Energies

Preliminary study on the technical requirements of the grid-connected microgrid

A probabilistic methodology for distributed generation location in isolated electrical service area

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