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According to the problem that D-STATCOM is difficult to promote for its high price, this paper proposes a mixing application idea of D-STATCOM and switched capacitor. As for one group of switched capacitor and D-STATCOM, a minimize loss switching strategy is presented to achieve the optimization of overall loss. And for multiple groups of switched capacitor and D-STATCOM, a cooperative control tactics...
It is shown that application of adjustable sources of reactive power based on magnetically controlled shunt reactors and capacitor banks in 110-500 kV grids allows to substantially lower the damage from power supply interruption, to reduce the need of electrical grids construction by maximizing power transmission capacity of existing lines, to improve the quality of power supply to end users, and...
This paper summarizes the history of volt/VAR control at Progress Energy Carolinas (PES) for the transmission to distribution and distribution systems. PEC has transitioned from a volt/VAR control system that incorporated local control of capacitors and regulators to an automated system that provides remote control of feeder capacitor banks. Currently PEC is implementing a Distribution System Demand...
This paper proposes a new half-bridge inverter based active power quality compensator (APQC) for electrified railways with a three-leg inverter. The first-leg is connected to α-phase, and the second-leg is connected to β-phase. The midpoint of two capacitors on the dc side is connected to the ground line. These two half-bridge inverters exchange the active power on the each feeder each other through...
As part of the Northwest Transmission Development projects, Alberta Electric System Operator (the AESO) and ATCO Electric Ltd (ATCO) identified the need to provide reactive power compensation to support area voltage and to provide voltage stability in Grand Prairie/Peace River area in the Province of Alberta. It was identified that a +/− 30 MVAr Static VAR Compensator (SVC) would be required to provide...
This paper proposes coordinative control method between STATCOM installed within substation and other reactive power resources including shunt reactors and shunt capacitors and OLTC. Voltage/reactive power control has various difficult aspects to control because of analysis and system dynamics error. This coordinative control method suggests practical algorithm regarding system voltage and reactive...
This paper presents an application of a flexible AC transmission system (FACTS) device as additional control in reactive power (VAR) optimization problem and analyzes the impact on system loss minimization. The adopted FACTS device is a new static VAR compensator (SVC). The general SVC consists of internal devices, and local devices, and the operation mode of the general SVC model is voltage control...
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