Compensation of harmonics and unbalance caused by a variable load using a dynamic phase balancer

This talk will briefly describe the phase balancer supplied to ALSTOM at Asfordby in Leicestershire for the test track which is being used for testing the new Pendolino trains. The phase balancer consists of a Thyristor Controlled Reactor (TCR) and an array of single phase filters. Reactive power compensation of the dynamic unbalanced load due to the trains is required along with harmonic suppression in a wide range of network operating conditions. Some test results will also be included.