Ultra-Capacitors in Power Conversion Systems Applications, Analysis and Design from Theory to Practice by Petar J. Grbovic
Reactive Power Compensation A Practical Guide By Wolfgang Hofmann, Jurgen Schlabbach and Wolfgang Justauth
Reactive Power Control in AC Power Systems Fundamentals and Current Issues by Naser Mahdavi Tabatabaei, Ali Jafari Aghbolaghi, Nicu Bizon and Frede Blaabjerg