5331Grid Connect Operation

The PECS can be configured to operate in a grid-connect (GC) mode of operation. In that case, the system follows the voltage and frequency from the grid and behaves like a controlled current source. Grid-connect applications include load following and peak shaving. One of the key aspects of a GC system is that the synchronization, protective relay, and anti-islanding functions required to reliably and safely interconnect with the grid can be integrated directly into the PECS. This capability is a major advantage of PECS in DG systems, and eliminates the need for very expensive and cumbersome external equipment required in conventional generation technologies.

Another aspect of PECS in DG is the ability to provide power quality functions without any external equipment. For example, the PECS can be controlled to supply reactive power and is capable of performing voltage regulation and power factor correction.

Many performance characteristics of the electric utility grid cannot be easily duplicated by DG technologies. For example, the ability to supply large fault currents and rapid power demands (both real and reactive) is rather limited in DG systems. As opposed to being viewed as a potential replacement for the grid, a DG system with advanced PECS should be considered as an enabling technology allowing improvements to the reliability and power quality of the grid.

Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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