Use Of Static Synchronous Compensator Research Articles

Application of Static Synchronous Compensator for Improvement of Power System Transient Stability

Transient stability is the power system’s ability to maintain synchronism when exposed to severe disturbances such as loss of generation, rapid load changes, transmission lines tripping, switching operations and faults. Transient instability causes cascading outages, system collapse and economical losses. This study employed static synchronous compensator (STATCOM) for power system transient stability improvement. The system’s steady state and transient responses were respectively modelled with Newton-Raphson power flow and modified-Euler linearized swing equations. A balanced three-phased short circuit fault was introduced on selected buses for transient stability analysis. The steady state and transient responses of the system were simulated with and without STATCOM. The critical fault clearing time (CFCT) was obtained from the generators’ swing curves. The IEEE 9-bus and 14-bus power networks were used as test cases. The voltage magnitudes of all buses in both networks fell within the specified 0.95 to 1.1 p.u. voltage limit with and without compensation. The total active line loss on IEEE 9-bus and 14-bus networks which were 4.641 and 13.514 MW without compensation reduced to 4.600 and 13.014 MW, respectively with STATCOM’s application. The total reactive line losses of both networks which were 92.160 and 31.393 MVAr without compensation decreased to 90.160 and 30.693 MVAr, respectively with STATCOM’ utilization. The CFCT for fault on bus 8 of the IEEE 9-bus system without compensation were 0.2100 and 0.2700 s for generators 2 and 3, respectively. The system’s stability was, however, extended beyond 0.2700 s due to compensation from STATCOM. In the case of IEEE 14-bus system, the CFCT for fault on bus 6 was 0.36364 s for generators 2, 3, 4 and 5, respectively without compensation. The STATCOM inclusion, however, enhanced the system’s stability beyond 0.36366 s where all the four had lost synchronism. This work established that the use of STATCOM on the considered networks appropriately extended the CFCT such that the stability of the systems was not lost in the event of fault application via robust compensation of reactive power.

Coordinated Wide-Area Damping Control in Modern Power Systems Embedded with Utility-Scale Wind-Solar Plants

This paper presents a coordinated wide-area damping control of power system stabilizers (PSSs), static synchronous compensator (STATCOM), and static synchronous series compensator (SSSC) for grid-forming based wind and solar PV generation resources. The main objective of this work is to enhance the damping for inter-area oscillations while maintaining the voltage and frequency in the prescribed range, taking into consideration the operational uncertainties. Better voltage and reactive power support are provided by the use of STATCOM and for additional damping, an SSSC is employed with the coordinated wide-area damping controller (CWADC). Variable-speed wind turbine control methodology strategically combined with inertia control, de-loading control, pitch angle control, and electronic rotor speed control is employed to obtain an optimum response for discontinuous generation mixes and variable wind speed. The geometric measures of controllability/observability and residues method have been utilized to choose the appropriate input control signals and optimal location of CWADC. A multi-objective salp swarm algorithm has been used to optimize the parameters of the proposed CWADC. To demonstrate the efficacy of the proposed CWADC, nonlinear time-domain simulations are performed on a modified IEEE 68-bus test system embedded with hybrid wind-solar power plants considered multiple time delays.

PV solar farm as static synchronous compensator for power compensation in hybrid system using Harris Hawks optimizer technique

<p>Nowadays, the power of impact elements and the proximity and defense areas exist and are increasing exponentially. To аlleviаte these рrоblems, renew the energy sоurсes suсh аs рhоtоvоltаiсs, wind power, and other things that are made to be taken. This is considered to be a night and night use of static synchronous compensator (STATСОM) to meet the release of lоаd. Sоlаr fаrm photovoltaic (РV) рrоduсes energy during the night and not completely trapped at night. During dаy, the inverter is used for normal operation and at midnight, it is used to meet load demand more efficiently by controlling voltage, current, active, and reactive power. The proposed strategy is validated in the MATLAB/Simulink software and compared with the existing schemes such as cat swarm optimization-particle swarm optimization (CSO-PSO) and tree seed algorithm (TSA) with recurrent neural network (RNN).</p>

Application of static synchronous compensator and energy storage system for power system stability enhancement

The major drivers of the quest for optimal placement of flexible alternating current transmission system (FACTS) devices are the quest for smart grids and economic indicators. The demand for energy and power stability will continue much as the astronomic growth in industries and increase in global population remains. The aim of this paper is to deliver a panoramic view of the use of static synchronous compensator (STATCOM) in combination with energy storage system (ESS) in order to enhance power stability. In this paper, it was observed that application of ESS is an important factor in attaining power stability and mitigating the effect of dynamics associated with the power supply system. The miniaturization of batteries and adequate placement of STATCOMs will be a challenge much as new power system are built or existing ones are expanded. The future of ESS is towards the adoption of renewable energy sources as against batteries.

Advanced Control Architectures for Intelligent Microgrids—Part II: Power Quality, Energy Storage, and AC/DC Microgrids

This paper summarizes the main problems and solutions of power quality in microgrids, distributed-energy-storage systems, and ac/dc hybrid microgrids. First, the power quality enhancement of grid-interactive microgrids is presented. Then, the cooperative control for enhance voltage harmonics and unbalances in microgrids is reviewed. Afterward, the use of static synchronous compensator (STATCOM) in grid-connected microgrids is introduced in order to improve voltage sags/swells and unbalances. Finally, the coordinated control of distributed storage systems and ac/dc hybrid microgrids is explained.

Transient Stability Improvement of a Squirrel Cage Induction Generator in Wind Farm Using STATCOM with Supercapacitor

The increasing demand for electric power combined with depleting natural resources has led to the substantial improvements in the usage of renewable energy systems such as wind and solar especially among the developing countries. Today, wind turbine deployment shows the fastest growth both nationally and globally. Wind Electric Generators (WEG) were earlier used for isolated power supplies especially in remote locations and rural areas. In recent times, grid-connected wind electricity generation shows the highest rate of growth, achieving global annual growth rates in the order of 20–28%. According to World Wind Energy report 2010, published by World Wind Energy Association, Germany, worldwide installed capacity of wind energy reached 196630 MW out of which 37642 MW were added in 2010. Squirrel Cage Induction Generator (SCIG) is the most used generator type for WEGs One of the major issues concerning SCIG coupled to wind turbine is voltage instability problem when it is interconnected with grid. It occurs in a power system when the reactive power demand by SCIG during grid faults and heavy loading conditions is not met by the capacitor banks installed near SCWEG. This paper examines the use of STATCOM (STATic synchronous COMpensator) with Super Capacitor Energy Storage System (SCESS) to improve power quality of SCIG in the event of any unbalanced or balanced fault in the grid. Simulation is done in MATLAB SIMULINK for various conditions. Due to the fast response of supercapacitor in developing the counterbalancing electromagnetic torque, shaft acceleration is prevented and the transient stability of SCIG is increased so that it can meet the new interconnection grid code requirements. Further it is observed that the settling time of SCIG after the fault clearance is also reduced. System transients are suppressed and normal conditions are quickly restored with STATCOM and supercapacitor.