Application of SSSC for LFC of a Deregulated Power System Using Particle Swarm Optimization (original) (raw)
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ENHANCEMENT OF POWER FLOW USING SSSC CONTROLLER
Abstract- This paper demonstrates Static Synchronous Series Compensator (SSSC), a device belonging to Flexible AC Transmission System (FACTS) family. The SSSC, a voltage source inverter connected in series with the transmission line injects the voltage in quadrature with the line current. Properly designed PI controller ensures effectiveness on the dynamic and transient operation of the system. SSSC controller helps improve voltage stability and compensate reactive power. The proposed power system control scheme is supported by simulation in MATLAB/SIMULINK environment.
A new control strategy for SSSC to improve low-frequency oscillations damping
Journal of Power Engineering, 2016
When power systems are expanded and connected together with weak tie lines, the low-frequency oscillations are increased and the stability margin of the power system decreases. Therefore, when designing the transmission system to be used, it is necessary to maintain the dynamic stability of the power system, and to make sure to have the most possible stability margin. SSSC is a FACTS device connected in series with power transmission lines. SSSC can control power flow very effectively and can inject series inductive or capacitive voltages into the line. In this paper, a new control strategy based on voltage measurement for the SSSC is proposed. The commonly used strategy for SSSC is based on line current measurement; consequently, the injected voltage is in quadrature with the line current. But in the proposed strategy, the injected voltage is in quadrature with the ac voltage at the point of common coupling (PCC) of SSSC. With modifications done in the proposed strategy, compared w...
SSSC to control Power flow in the Line
Journal of University of Shanghai for Science and Technology, 2021
FACTS controller is the Power Electronics based static controller which enhance power transfer capability and increase controllability of the power system network. Static Synchronous Series Compensator (SSSC) is VSC based controller which is used in transmission network with the aim of utilization of existing line upto its fullest extent. This paper demonstrates transmission line power flow control with the help of SSSC. A control scheme of SSSC is presented to control active power flow in the line. Increase in the power flow in the line is realized with SSSC operation in capacitive mode of operation and decrease in the power flow is realized with SSSC operated in inductive mode of operation. MATLAB simulation studies are demonstrated to validate the SSSC operation.
Power Flow Control with Static Synchronous Series Compensator (SSSC)
2008
The Static Synchronous Series Compensator (SSSC) which is a Series FACT controller, becomes more attractive due to its superior abilities over the impedance-based series compensation. These superior abilities can only be achieved by appropriate control schemes and controller settings. This paper investigates two control schemes of the SSSC for the power flow control. In the first scheme, which is called Reactance Emulation Scheme, the SSSC performs a function of the series impedance connected to the transmission line. This performance can be achieved by controlling the quadrature voltage of the SSSC in relation to the transmission line current, and the required series impedance compensation. In t he second control scheme, which is called Quadrature Voltage Control Scheme , the SSSC injects a quadrature voltage into the transmission line. Three modes of compensation, which are capacitive compensation , inductive compensation , and reverse power flow, can be achieved by controlling th...
A voltage measurement based control of a SSSC
2010
Flexible AC Transmission Systems (FACTS) offer the possibility of controlling line transmission parameters in order to optimize and enhance the system characteristics. Static Synchronous Series Compensator (SSSC) is a FACTS that can be used to modify the power flow through a transmission line. Classical SSSC control approach is based on injecting voltage in quadrature with the line current, so that only reactive power is exchanged with the transmission line in order to modify the active power flow. In this paper, a new control approach based on the grid voltage instead of the line current is proposed. Both strategies are compared theoretically. PSCAD/EMTDC simulations have been performed to validate this theory. The results demonstrate that the new control strategy exhibits better results under non-sinusoidal conditions.
Using of TCSC and SSSC to Control the Power Flow and Oscillation Damping
The development of the modern power system has led to an increasing complexity in the study of power systems, and also presents new challenges to power system stability, this study investigates the improvement of power flow control and oscillation damping, by using TCSC and SSSC which is an effective FACTS device. Power system oscillation has been recognized as one of the major concerns in power system operation. Simulations are carried out in Matlab/Simulink environment to evaluate the effectiveness of Fixed Capacitor (FC), Thyristor Controlled Series Capacitor (TCSC), and Static Synchronous Series Compensator (SSSC) on three-machine power systems. The performance of TCSC is compared with FC and other FACTS devices such as Static Synchronous Series Compensator (SSSC).The simulation results show that in damping power system oscillations, the SSSC is more effective than TCSC and FC. In addition, the implementation of TCSC and SSSC to control the flow of power in apart of Libyan 220Kv ring around Tripoli center and specifically to reduce the loading of highly loaded transmission line in this network is presented.
Testing and Validation of a 200 kVA SSSC Prototype for Power Flow Control
Renewable Energy and Power Quality Journal, 2013
Power flow control in transmission networks requires new approaches to deal with the uncertainties in the power flow patterns caused by the massive integration of renewable energy generators and the difficulties for constructing new transmission corridors, due to environmental restrictions and social opposition. One solution explored nowadays by utilities is the installation of a Static Synchronous Series Compensator (SSSC). This paper presents a real test bench for an SSSC. The test bench allows verifying the real control devices of a substation and the PLC close-loop control of the SSSC. The proposed SSSC test bench is a scale FACTS device of a 50MVAs real SSSC that will be placed in the Spanish transmission grid. In this paper the design of the test bench is presented, including the main magnitudes of both grid and SSSC, along with the substation SSSC control scenario and the SSSC close-loop control strategy. Besides, the SSSC test bench dynamics and response has been validated using a model of the SSSC and its controls, developed in Matlab/SimPowerSystems. The paper shows the results of the simulation and compares them with the magnitudes measured in the test bench.
The main aim of this work is to damp out power system oscillations, which has been recognized as one of the major concerns in power system operation. In a Static Synchronous Series Co mpensator (SSSC), a controllable A C voltage is generated by a voltage-source converter. There are two control channels for controlling the magnitude and phase of the voltage. This work describes the damping of power oscillations by static synchronous series compensator (SSSC) based damping controllers. The advantage of this approach is that it can handle the nonlinearit ies, at the same time it is faster than other conventional controllers and it improve the reactive power of the system. Simu lation studies will be carried out in Matlab/Simu link environ ment to evaluate the effectiveness of the proposed Static synchronous series compensator (SSSC) of mu lti-area power system. Results will show that the proposed SSSC based damping controllers improve the dampin g performance of the in the event of a major d isturbance.
The maintenance and availability of the power system can be considerd a major aspect of investigation. The encouragement to the planning of HV lines, the valuet of power that transfer per km on HV line and the amount of power transaction as seen from economic side is much responsible for concern towards congestion phenomena in power system. The idea for solving this problem is the use of FACTS devices especially the use of Synchronous Series Compensators (SSSC). In this paper the study of SSSC with its various modes of operation is investigated. Finally by help of modeling of a power system in MATLAB/PSAT toolbox, and by installing SSSC in transmission link, its use as power flow controller and voltage injection is seen. Conclusion is made on different results to see the benefit of SSSC in power system.