Dynamic voltage compensation on distribution feeders using flywheel energystorage

Advancements in power electronics, bearings and materials have made flywhee l energy storage systems viable alternative to electrochemical batteries. A future application of such a device is an uninterruptible power supply for critical loads on a distribution feeder. However, the same power electroni cs and flywheel system could also be used for dynamic voltage compensation. A comparison is made between series and parallel connection of such dynami c compensation techniques used to maintain rated load voltage on distributi on feeders when there are momentary dips-in the supply voltage. For each ca se a mathematical model is presented and analyzed. The two cases are compar ed and the series compensation technique is more effective.