B. Meersman, B. Renders, L. Degroote, T. Vandoorn, L. Vandevelde
{"title":"Control design of grid-connected three-phase inverters for voltage unbalance correction","authors":"B. Meersman, B. Renders, L. Degroote, T. Vandoorn, L. Vandevelde","doi":"10.1002/9783527698523.ch13","DOIUrl":"https://doi.org/10.1002/9783527698523.ch13","url":null,"abstract":"The increasing presence of single-phase distributed generators and unbalanced loads in the electric power system may lead to unbalance of the three-phase voltages, resulting in increased losses and heating effects. A type of voltage unbalance with a high probability in (low voltage) distribution networks is the unequal voltage magnitudes at the fundamental system frequency (under- and over-voltages). To decrease this voltage unbalance problem three-phase four-wire inverter-connected distribution units can be used. This paper proposes a control method for a three-phase four-wire inverter for Distributed Generation (DG) units which has a resistive behaviour for disturbances. The effect of the proposed control method on the voltage unbalance in the distribution network is simulated and is compared to the classical sinusoidal control strategy. The simulation results show the positive effect of the proposed control strategy on voltage unbalance.","PeriodicalId":182722,"journal":{"name":"2009 44th International Universities Power Engineering Conference (UPEC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123647740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The integrated control of the rotor side and grid side converters in a DFIG to reduce both power and torque pulsations during network voltage unbalance conditions","authors":"Joseph Kearney, M. Conlon, E. Coyle","doi":"10.21427/ET3D-FD74","DOIUrl":"https://doi.org/10.21427/ET3D-FD74","url":null,"abstract":"The paper describes a method to control the rotor-side and grid side converters in a DFIG when subjected to the effects of network voltage unbalance conditions. In particular the control scheme of the grid side converter is adapted to assist in the control of the total power oscillations when the rotor side converter is controlling the DFIG torque pulsations. A DFIG model is implemented in Matlab/Simulink and simulations show the reduction in power and torque oscillations and a reduction in the high unbalanced currents generated as a result of the applied voltage unbalance.","PeriodicalId":182722,"journal":{"name":"2009 44th International Universities Power Engineering Conference (UPEC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127107421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optimal placement of distributed generation on distribution networks","authors":"C. Tautiva, A. Cadena","doi":"10.1109/TDC-LA.2008.4641762","DOIUrl":"https://doi.org/10.1109/TDC-LA.2008.4641762","url":null,"abstract":"In this paper we propose and develop a heuristic methodology based in genetic algorithms to obtain the optimal placement and size of distributed generation in order to maximize the net benefit for the distribution utility's cost. Technical aspects like energy losses, voltage levels and reliability are considered, as well as economic aspects like price of energy, investment and operating cost of distributed generation, cost of losses and energy not supplied. We use the IEEE 13 nodes test feeder to validate the methodology. Analysis and simulations indicates that installation of DG results in positive net benefits for loss reduction and voltage improvement; reduction of the ENS index is reached when installing DG in highly loads nodes.","PeriodicalId":182722,"journal":{"name":"2009 44th International Universities Power Engineering Conference (UPEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127503662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}