This is a much needed book recognizing that VSC technology is rapidly developing as it applies to electric power systems. It is so rapid that it is challenging to keep up with VSC confi gurations and control that continue to emerge and fi nd applications in power systems. It is important to realize that the conventional thyristor-based converter or line commutated converter (LCC) with its controls and protection requirements are far less technically challenging than VSC technologies applied to wind turbine generators and VSC transmission. The authors emphasize the basic module of a VSC valve, the half-bridge converter. It is often applied as the building block for VSCs that interface between ac and dc systems.
