Abstract
This article deals with the influence of distributed generation (DG) on distribution line losses with respect to voltage profile. The article focuses on the development of a control strategy to minimize the grid losses and assure fairness regarding reactive power contributions. As retail customers typically have no choice where they are located along a feeder, it seems unfair that only some of them bear all the burden and responsibility for the voltage rise. On the basis of new technologies, which are capable of fast communication and data processing, a new control system has been proposed that combines classical centralized and local control. The heart of the control system is a load‑flow algorithm, which estimates the voltage drop using a modeled network. Different control solutions were evaluated by means of computer simulations. The simulated network is an actual Slovenian medium-voltage distribution network which covers a large area with diverse feeders and thus gives relatively general results.
Highlights
High penetration levels of distributed generation (DG) on an electrical distribution system present several challenges and opportunities for distribution utilities [1]
Classical control with On-Load Tap Changer (OLTC) is mostly based on only one substation voltage measurement point [3]. Such a scheme is robust and performs well under most operating conditions, but the majority of distribution networks are generally not designed for the connection of DG and they may fail if DG sources are connected in the network as they may cause a voltage rise on a particular feeder [2]
As retail customers typically have no choice where they are located along the feeder, it seems inappropriate that they be required to produce or consume a large amount of reactive power and bear all the burden and responsibility for the voltage rise along the entire feeder
Summary
High penetration levels of DG on an electrical distribution system present several challenges and opportunities for distribution utilities [1]. Classical control with On-Load Tap Changer (OLTC) is mostly based on only one substation voltage measurement point [3] Such a scheme is robust and performs well under most operating conditions, but the majority of distribution networks are generally not designed for the connection of DG and they may fail if DG sources are connected in the network as they may cause a voltage rise on a particular feeder [2]. DG generation usually worked at a constant power factor (cos φ = 1) and did not provide any ancillary services to the network; the voltage control, as previously mentioned, was carried out only by OLTC Nowadays, many countries such as Slovenia have set up rules for DG to use static characteristic Q(U) for the contribution with the local voltage control [4].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
