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The structures of distribution systems are changing due to increasing penetration of distributed generations (DG units) as well as integration of advanced controllers and communication infrastructures. As a result, emerging distribution networks have a number of generators and controllers operating in a closer proximity. Such a proximity of dynamic devices results into modal interactions, which can...
This paper presents a comprehensive simulation study to show the adequacy of two solar farm models for small signal stability analysis. Simulation study is carried out by considering solar farm as single-and multi -generator equivalents for both models. The simulation results are presented for a small interconnected system by considering different short circuit ratios (SCR). Both Solar farm models,...
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...
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...
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...
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