Compensation characteristics of the combined system of shunt passive and series active filters

A combined system of shunt passive and small rated series active filters, as well as its operating principle and steady compensation characteristics, was previously presented by the authors (1988). The combined system can greatly reduce problems of using only the shunt passive or shunt active filters and is suitable for harmonic compensation for large VA-rated loads in power systems. Transient compensation characteristics and the stability of the system are discussed and analyzed theoretically and experimentally in detail. A control method enables the combined system to be applied to cycloconverter compensation. Some results obtained with the experimental model are presented to demonstrate and confirm the method's validity.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>