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The high level penetration of distributed generation in power distribution systems has not only improved the power quality but also generated other challenges. The challenges are related to the interconnection of different power generation units and the need to keep the power delivered to the end user at the standards levels. Different controllers are implemented to simplify interconnection of a distributed...
Grid-connected solar photovoltaic distributed generation (PV-DG) units offer many benefits such as clean energy, reduced emissions and creation of new green jobs. A combination of supportive legislation, incentives, technology developments and costs decrease have favored the proliferation of PV-DG plants of different capacities, ranging from a few kVA (small-scale) to several MVA (large-scale). Due...
A growing number of North American utilities are experiencing a significant proliferation of photovoltaic distributed generation (PV-DG). PV-DG integration can pose a challenge to distribution utilities due to the variety of impacts on several aspects of distribution systems planning and operations and the fact that hitherto distribution feeders have been designed and operated for supplying unidirectional...
The penetration level of renewable based distributed generation (DG) has increased rapidly in recent years. Grid standards demand small DG units to operate with constant power factor control mode and large DG units with voltage control mode. As a result, small DG units are exposed to the problem of slow voltage recovery due to contingencies like fault. This paper proposes a new sensitivity index based...
Integration of small distributed generation (DG) units to weak distribution system is a major concern for power system engineers. Recent grid standards demand small DG operation with power factor control mode. Lack of sufficient reactive power support brings the problem of slow voltage recovery under post-fault condition. This paper presents a comprehensive VAR planning with a mixture of both static...
Stand-alone power systems (SPS) are attracting more and more interest with the global movement toward the distributed generation. Due to their disconnection to the power grid, they are suffering from poor load following capability under load variations. In order to solve this problem, this paper provides an AC power solution based on flywheel energy storage. The proposed flywheel system is characterized...
Recently, there has been a considerable increase of distributed generators (DGs) connected to the distribution network. Therefore, the concept of the microgrid has been developed. A microgrid is a cluster of DGs, loads and power storage devices that is typically connected to the distribution network via a single point of connection. Most DGs are connected to the microgrid via a power-electronic inverter...
This paper describes the operation of a microgrid that contains a custom power park (CPP). The park may contain an unbalanced and/or nonlinear load and the microgrid may contain many distributed generators (DGs). One of the DGs in the microgrid is used as a compensator to achieve load compensation. A new method is proposed for current reference generation for load compensation, which takes into account...
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