Centralized and Distributed Voltage Control: Impact on Distributed Generation Penetration

Abstract

With the rapid increase in distributed generation (DG), the issue of voltage regulation in the distribution network becomes more significant and centralized voltage control (or active network management) is one of the proposed methods. Alternative work on intelligent distributed voltage and reactive power control of DG has also demonstrated benefits in terms of the minimization of voltage variation and violations as well as the ability to connect larger generators to the distribution network. This paper uses optimal power flow to compare the two methods and shows that intelligent distributed voltage and reactive power control of the DG gives similar results to those obtained by centralized management in terms of the potential for connecting increased capacities within existing networks.

Decentralized voltage control of clustered active distribution network by means of energy storage systems

“…Several methods have been proposed in the literature to overcome this issue including centralized and decentralized schemes [5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

“…Thus, there is a consequent computation complexity associated to the central information gathering and processing. Also, the centralized control faces difficulties in some applications when global information is not available [4,5]. Furthermore, in the case of a failure of the central supervisor, the control is lost all over the network.…”

Sensitivity-based dispatch of DG for voltage control

“…DG CONNECTION REQUIREMENTS AND OPERATION DG connected to the distribution network is known to influence short-circuit levels, reverse power flows, voltage regulation, system loading and network losses [3,4]. Distribution Codes state that the impact of connecting DG to the network should be assessed to ensure that all elements of the network function within their operational limits [5].…”

Microgrid Stability Controller Based on Adaptive Robust Total SMC

“…Features such as low investment, environmental friendliness, high reliability and flexibility make distributed generation (DG) systems an interesting and promising technological option [1][2][3]. As power systems are seeing an increasing DG penetration level, beside the aforementioned advantages, DG units may also bring problems to the utility grid like bidirectional power flow, voltage deviations, and voltage fluctuations.…”