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There has been a problem of voltage instability and increased power loss on transmission lines due to the ever increasing load growth. This work investigates the effect of Static Synchronous Compensator (STATCOM) to mitigate power losses and enhance voltage stability of a transmission system. To validate the capacity of STATCOM in this direction, a scaled model of IEEE 14 bus test system was built...
In this paper, modeling of STATCOM for regulate the voltage in power flow calculation is proposed. Based on power flow, the proposed technique has been presented and tested on 26-bus power system. The results proved the correctness of the proposed technique. The influence of the STATCOM on regulating voltage and decreasing power losses has also been discussed in detail.
Wind power plants play an important role in the power system especially under integration of high penetration levels of wind energy into grid. Many requirements for the wind power plants have been proposed in Saudi Arabia Grid Code. One of these requirements is power quality including active and reactive powers, flicker, voltage swell, harmonics and voltage sag. These power quality aspects are generated...
The renewable energy plays an important role to provide electrical energy other than conventional sources. Wind power is one of the renewable energy sources used to minimize the environmental impact on conventional plant; it is one of the fastest growing sources of energy in the world. However, when the wind power is connected to an electric grid may cause problems important in terms of power quality...
Power loss is a major issue in power system. In this paper Hysteresis Band Current controller based STATCOM is proposed to reduce power loss in transmission system. By compensating the load reactive power, the power loss in the transmission line is mitigated. Controller for STATCOM is designed and analyzed for linear and non-linear type loads. Simulation is carried out through Matlab and the output...
With the increasing trend of wind energy in the power system, the significant impacts for system operation are got more attentions. Due to voltage fluctuating supplied by the renewable sources, it is a significant challenge to maintain power quality in power system with existing technologies. Voltage fluctuating will cause the balance problems for power flow among wind power plants and eventually...
This paper presents a Particle Swarm Optimization (PSO) based algorithm to find the optimal location and setting of FACTS devices in order to improve the loading margin as well as voltage stability and small signal stability. Recently, the electric load demand has been continuously growing all over the world. The rapid increase in load demand enforces power systems to operate closer to the limits...
An ever-increasing size of the power system transmission networks has made the system to be prone to various disturbances which could result to system instability. Therefore, increasing the critical clearing time (CCT) of faults before necessary actions are taken is of paramount importance to power system operators in order to maintain and enhance the dynamic security of the system. This paper takes...
In this paper, an attempt has been made to determine the proper location of STATCOM and series compensator working independently as well as simultaneously for improving the transient stability of a multi machine power system. The transient stability condition is usually assessed by evaluating critical clearing time (CCT), i.e. maximal fault duration for which the system remains transiently stable...
Power system state estimation is one of the functions performed in modern control centers. When FACTS devices are in a power system they should be taken into account in state estimation. In the paper, existence of UPFC, i.e. the most universal FACTS device, in a power system is considered. UPFC can operate in different modes. It can operate with full utilization of its possibilities or as SSSC or...
This paper presents neural networks based approach for estimation of the control and operating parameters of Statcom used for improving voltage profile in a power system, which is emerging as a major problem in the day-to-day operation of stressed power systems. Statcom is an important voltage source converter FACTS device, which can be used in voltage control mode or reactive power injection mode...
The main function of STATCOM is to compensate reactive power on-line, making the power system have ideal power factor. According to the instantaneous power theory, a novel control method is proposed in this paper that power is detected to be the reference compensation power direct. Basing on the relationship between power and switching of IGBTs, the method of double switch tables is used to control...
Nowadays, the power system is facing new challenges in increasing renewable energy sources' penetration. One of these problems is voltage stability in wind farms equipped with doubly fed induction generators (DFIGs) during grid faults. Flexible AC Transmission System (FACTS) devices can be used for this problem. This paper, investigates the Static Synchronous Compensator (STATCOM) application to achieve...
Series compensation in long transmission lines is an effective solution of enhancing power transfer capacity of Power System network. In this paper, series passive compensation and shunt active compensation provided by static synchronous compensator (STATCOM) and other FACTS controllers connected at the electrical center of the transmission line are considered. The presence of series capacitors has...
This paper presents a novel nonlinear optimal neurocontroller for a static compensator (STATCOM) connected to a power system. The design for the optimal controller is based on a class of Adaptive Critic Designs (ACDs) called the Action Dependant Heuristic Dynamic Programming (ADHDP). The ADHDP class of ACDs uses two neural networks, an “Action” network (which actually sends the control signals) and...
A number of years ago when FACTS applications had generated a great deal of enthusiasm, a paper was prepared predicting its applications in the power system restoration. It was predicted that many of the FACTS applications such as thyristor controlled shunt reactors, phase/voltage regulators, STATCOM, SVC, SSSC and thyristor controlled braking resistors (TCBR) were equally applicable to power system...
This paper describes the potential usage of a STATCOM installed in the power system for damping torsional oscillations induced in turbine generators in series capacitive compensated transmission grids. This is achieved by operating the STATCOM in a phase imbalanced mode for a few seconds after a large system disturbance. The phase imbalanced operation reduces the energy exchange between the electrical...
When integrated to the power system, large wind farms can pose voltage control issues among other problems. A thorough study is needed to identify the potential problems and to develop measures to mitigate them. Although integration of high levels of wind power into an existing transmission system does not require a major redesign, it necessitates additional control and compensating equipment to enable...
This paper deals with the modeling of synchronous static compensator (STATCOM) of a power system based on dynamic phasor model to investigate the performance of STATCOM for power quality analysis and compared with EMTP like simulation. The dynamic phasor model and EMT model of the STATCOM including the system is implemented in Matlab/Simulink toolbox and PSCAD/EMTDC, respectively. Details dynamic...
As a common reactive power compensation equipment in power system, the static synchronous compensator (STATCOM) has played a very important role in the stable operation of power system, which requires fast response and well-designed controller. This paper presents a new approach to proportional-integral-derivative (PID) controller design of STATCOM based on root counting and signature theory with...
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