An analytical approach for the operation of series compensators to relieve power flow congestion

Abstract

This paper describes an analytical approach for the operation of series compensators to relieve power flow congestion. The flexible AC Transmission Systems (FACTS) devices such as thyristor-controlled series capacitor (TCSC) and static synchronous series compensator (SSSC) can control power flow in the line by varying reactive line impedances. In the case of congestion problem at normal state or at contingency state, it is necessary for these devices to change their operating points to relieve the line flow congestion and eventually to increase the system security level. In order to find the approximate operating points, the changes in line flows for changes in control variables by series compensators are derived analytically in this paper. The derivation of these sensitivity factors is based on the DC model of power flow analysis and under the assumption that the generation dispatch is maintained. Changes in the direction and the amount of compensation can be determined according to sensitivity Values derived from DC power flow model. For verijkation of the proposed method, intensive studies have been pegormed on a 10-unit 39-bus New England System equipped with multiple series compensators.

Multi-objective transmission expansion planning with allocation of fixed series compensation under uncertainties

“…3. Run the OPF subproblem (MATPOWER optimal power flow functions 42 ) and reliability subproblem using input parameters (X), which is composed such as Equation 23.…”

“…In Ziaee and Choobineh, a stochastic structure for optimal locating and sizing of TCSC and optimal locating of line switches on a transmission network considering load and wind uncertainties in order to reduce energy cost is proposed. In Lim and Moon, an analytical methodology for optimal locating of series FACTS devices such as TCSC and SSSC on a transmission network in order to relief the line flow congestion is presented. In Khazaie et al, the ability of the distributed power flow controller (DPFC) as a useful tool to reduce the subsynchronous resonance (SSR) is presented.…”

A novel approach for global voltage stability assessment of a power system incorporating static var compensator

“…On the other hand, the advances in flexible alternating current transmission system (FACTS) controllers in power systems have led their applications in improving the overall performance of power networks . Several studies analyzing the application of FACTS controllers for voltage and angle stability have been reported by Abido .…”

FACTS Providing Grid Services: Applications and Testing

“…Congestion management [19][20][21][22]. A method for the optimum location of TCSC relieves congestion in both the normal state and contingency state with single line outage [19].…”

“…A method for the optimum location of TCSC relieves congestion in both the normal state and contingency state with single line outage [19]. An analytical method determines the optimum location of the TCSC and SSSC and relieves congestion in both the normal state and contingency state with a single line fault [20]. A pricing-based method finds the optimum location of the UPFC that mitigates line congestion and minimizes system operation costs [21].…”