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Renewable energy based generations are connected at subtransmission and distribution levels and are normally dispersed throughout the network. This causes a number of benefits and challenges for power system operators. This paper outlines voltage and small signal stability issues for a distribution network and provides a number of case studies.
This paper discusses modeling of a micro-grid with PV-Wind-Diesel generator hybrid system and its operations. The PV system is modeled with a DC/AC inverter with a pre-defined Maximum Power Point Tracking (MPPT) control. Fixed speed induction generator based wind turbines are used to model the wind farm. The diesel generator controls are modeled with droop governor and automatic voltage regulator...
This paper proposes a simple methodology for placing two principal types of DG units - synchronous machine and induction machine with an objective of enhancing loadability of distribution system. The proposed methodology is based on the concept of reactive power margin. Buses have been ranked based on the reactive power margin and grouped as “strong” and “weak” buses for finding suitable location...
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...
There has been a great interest in integration of distributed generation (DG) units at distribution level in the recent years. DGs can provide cost-effective, environmentally friendly, higher power quality and more reliable energy solutions than conventional generation. Understanding the wide variety of DG options available along with their technical benefits in today's changing electric market environment...
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