Next Article in Journal
Influence of a New Form of Bolted Connection on the Mechanical Behaviors of a PC Shear Wall
Next Article in Special Issue
Online Static Security Assessment of Power Systems Based on Lasso Algorithm
Previous Article in Journal
Gait Energy Response Functions for Gait Recognition against Various Clothing and Carrying Status
Previous Article in Special Issue
Rapid Prototyping of Multi-Functional Battery Energy Storage System Applications
Open AccessArticle

Effectiveness of Distributed vs. Concentrated Volt/Var Local Control Strategies in Low-Voltage Grids

Institute of Energy Systems and Electrical Drives, TU Wien, Vienna 1040, Austria
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(8), 1382; https://doi.org/10.3390/app8081382
Received: 28 June 2018 / Revised: 10 August 2018 / Accepted: 13 August 2018 / Published: 16 August 2018
This paper introduces a novel local Volt/var control strategy in a low-voltage smart grid. Nowadays, various Volt/var local control strategies built on customer photovoltaic inverters, e.g., cosφ(P) and Q(U), are introduced to mitigate the upper voltage limit violations in feeders with high prosumer share. Nevertheless, although these strategies are further refined by including more local variables, their use is still very limited. In this study, the effects of a new concentrated Volt/var local control strategy in low-voltage grids are investigated. Concentrated var-sinks, e.g., coils-L(U), are set at the end of each violated feeder. The concentrated local control strategy L(U) is compared with the distributed cosφ(P) and Q(U) strategies. Initially, both control strategies are theoretically investigated, followed by simulations in a test feeder. Finally, the expected practical significance of the findings is verified through simulations in a real typical urban and rural grid. Additionally, the impact of the different local control strategies used in low-voltage grids on the behavior of the medium-voltage grid is analyzed. The results show that the concentrated Volt/var control strategy eliminates the violation of upper voltage limit even in longer feeders, where both distributed local strategies fail. In addition, the concentrated L(U) local control causes less reactive power exchange on the distribution transformer level than the distributed cosφ(P) and Q(U) strategies. Therefore, the reactive power exchange with the medium-voltage grid and thus the distribution transformer loading are smaller in the case of concentrated local control strategy. View Full-Text
Keywords: smart grids; renewable energy resources; low-voltage grid; local Volt/var control; high prosumer share smart grids; renewable energy resources; low-voltage grid; local Volt/var control; high prosumer share
Show Figures

Figure 1

MDPI and ACS Style

Ilo, A.; Schultis, D.-L.; Schirmer, C. Effectiveness of Distributed vs. Concentrated Volt/Var Local Control Strategies in Low-Voltage Grids. Appl. Sci. 2018, 8, 1382.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop