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Integration of large-scale photovoltaic power plants is increasing significantly in many develop and developing countries. Although photovoltaic (PV) plants are renewable and environmental friendly, they can bring negative impact in the form of low frequency oscillation due to the uncertainty of power output and negligible inertia. Hence, battery energy storage systems (BESSs) are becoming an inevitable...
Renewable technology based Micro Grid (MG) are mostly implemented with power electronic devices. Those MGs have no or very small aggregated physical inertia, depending on the generation technology used. Reduction in system inertia may have negative influence on stability of the system where the MG is integrated. Conversely power injection from MG might reduce line congestion, stress on synchronous...
The ever-increasing trend of extracting electrical power from renewable resources is encouraging addition of more and more wind generation to the grid. However, the integration of added wind generation is compromising the stability of the system as wind generation technologies differ from that of conventional generation. Hence, there is an urgent need to investigate influence of various wind generation...
The dynamic analysis of modern power systems often requires computational assistance from software. Analysis software can be difficult to manipulate for exploring the characteristics of a power system, especially under a large number of operating conditions. In addition, many stability results are output in large tables of data, which leaves room for better visualization. This paper considers how...
Power system oscillations are inherent phenomena of power system. Inadequate damping can cause sustained power oscillation in the network. These oscillations can be reducing using supplementary control of existing flexible AC transmission devices. This controller, if robustly tuned, can provide sufficient damping on a wide range of operating conditions. Moreover, with the recent development in wide...
This paper presents the contingency ranking methodology of large interconnected power system for low frequency oscillatory instability problems. The oscillatory instability leading to blackout is often triggered by contingencies, such as line outage. In literatures, so far there is no such methodology presented for contingency ranking related to low frequency oscillatory instability. Two methodologies,...
Factors like diminishing fossil fuels and environmental concerns are driving the integration of locally available energy resources at a distribution level. As a result, a number of stability issues have become a concern for utilities at distribution systems. One of the important stability concerns is the small signal stability caused by electromechanical or other low frequency oscillations. The oscillations...
In this paper, the effect of increased solar power penetration by three Photovoltaic (PV) generator systems on inter-area oscillation is investigated. With the help of an illustrative example, it is shown that general trends for PV generator is to increase the damping of inter-area mode oscillation. However, there are exceptions for certain types of system, location and penetration for which PV generator...
Voltage instability is considered as one of the main threats to secure operation of power system networks around the world. Grid connected renewable energy-based generation are developing in recent years for many economic and environmental reasons. This type of generation could have significant impact on power system voltage stability given the nature of the primary source of generation and the technology...
Integration of renewable energy resources has introduced a number of dynamic stability issues in distribution systems. One of the major issues is the dynamic loadability limit, which is caused by a pair of eigenvalues crossing the imaginary axis of a complex plane. Due to the influx of distributed generators and controllers, a possible negative interaction can limit the dynamic loadability of emerging...
Power system low frequency oscillations influence dynamic behaviour of a complex power system and threaten its security. The dynamic performance of power system can be improved by damping low frequency oscillation with the help of supplementary controllers. This paper presents the design of supplementary controller for Static Var Compensator (SVC) to damp low frequency, in particular inter-area oscillations...
As the issues on market deregulation and renewable energy utilization are gaining significance, distributed generators are planned and installed in distribution systems to supply consumers directly. The distribution system is, therefore facing new challenges on its dynamic behavior with the addition of new dynamic devices. This paper investigates the small signal stability of renewable energy based...
This paper presents the impact of large-scale photovoltaic (PV) generation on power system oscillatory instability. Two models of PV generation systems, namely detailed dynamic and simplified models, have been studied in IEEE-14 bus test system typically used for power system oscillatory instability studies. Influence of radiation pattern, and size and location of PV generating system on the power...
Low frequency oscillations with growing amplitude can be a threat to secure operation of power system. Such oscillatory behaviour can be dealt with proper design of supplementary controller with the best input signal. This paper presents a design of supplementary controller for static Var compensator (SVC) using H∞ loop-shaping technique to damp low frequency, in particular inter-area oscillations...
Integration of renewable energy resources into an electricity distribution system has raised many challenges, including a number of stability issues. There are complex interactions among distributed generators due to their different manufacturing technologies, intermittent primary source of energy, and unregulated operations. Further, conventional shunt capacitors, which was used to support the voltage...
This paper presents the impact of large scale PV generation on Bangladesh power system oscillatory and static voltage stability. First, the eigenvalue of the system without and with PV based generator has been analyzed. Then system loading margin is studied without and with PV based generator. The influence of radiation, position, and penetration of PV based generator on system is considered for the...
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