Voltage Control for a Loop Distribution System with Renewable Energy Sources

Abstract

Abstract. This paper describes and verifies a voltage control for a loop distribution system. The proposed method adopts SCADA system based on voltage data from IT switches, which are sectionalizing switches with sensor installed at 6.6kV distribution line. The proposed voltage control combines centralized control of a LRT and autonomous control of decentrally-allocated RESs. The tap change control of LRT takes the major role of the proposed voltage control. It is the extended type of LDC method which is generally adopted, and minimizes voltage deviations based on voltage data from each IT switch. The output power control of RES additionally and autonomously supports the voltage control when the voltage violation from the upper limit is unavoidable. The reactive power control in the vacant capacity of RES's inverter mainly works, and the active power control works when not enough. In order to check the validity of the method, the experimental simulations using an analog distribution system simulator are carried out. This study is supported by a specially-promoted research grant of Power Academy in 2009 from the Federation of Electric Power Companies of Japan.

Detection of Cyber Attacks Against Voltage Control in Distribution Power Grids With PVs

“…Here, we employ a modified version of such centralized control based on those of [7], [23] described as follows. At each sampling time kT, the controller receives the sensor signal V i (k) of the voltage of each node i ∈ {1, .…”

“…Recently, various methods have been proposed to relieve such voltage rise by introducing some level of cooperation among the devices in the system through communication [3], [4], [7], [15], [23]. In general, there are two elements that contribute to these methods.…”

An overall cost based on optimal power flow control method of dual‐source distribution network with closed‐loop operation using UPFC

“…In Refs. [14][15][16], an optimal control method considering line loss and node voltage for the loop distribution system was studied, which could achieve the optimal goal by suppressing the loop current via UPFC. On this basis, the approach of controlling loop current and reactive current together by UPFC was presented to further lower the power loss [17].…”

Research on the optimal Power Flow Control method of the closed-loop distribution network with UPFC

“…Because of lacking effective power control measures in the traditional distribution system, the circulating power flow during the closed-loop operation with dual-sources, would cause the power distribution unbalanced ， even reverse power flow [6] [7] .The technique of Flexible AC Transmission System(FACTS), especially Unified Power Flow Controller(UPFC), can effectively control the reasonable distribution of power flow and improve the stability and reliability of the system [8] [9] . The research has been mainly focused on the application of transmission system.The application bottlenecks of UPFC in the distribution network is not the technology but the economy of apparatus [10] [11] . Combining the dispatching request of power flow with the economy of UPFC apparatus, this paper presents an optimal power flow control method of the closed loop distribution network based on the minimum of the UPFC capacity.…”