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Development of a Robust Constant Current Source For a Current Source Inverter

Current Source Inverter(CSI) has applications in the area of current protection. For CSI fed loads, when connected at a point of common coupling (PCC), the system voltage, may not always be a pure sinusoidal waveform, due to distortions created by other loads at the PCC. This paper presents two simple controllers, namely the comparator type and PI type, to derive and generate a constant current source, as input to be fed to the CSI. Results indicate that these controllers also work effectively even under distorted voltage waveform at the PCC. The controllers are validated for various source conditions and varying load conditions.