A general comparative analysis of static synchronous compensator and electric spring

With the nonlinear and unbalanced loads and high penetration of distributed generations connected into the power distribution network, some deteriorative influences such as poor power quality and stability issues have been caused. Static synchronous compensator (STATCOM) and another custom power device, electric spring (ES) are competent for solving these problems. This paper provides a general comparative analysis of STATCOM and ES on fundamental principles, control strategies and power quality improvement functions including reactive power compensation capacities and voltage regulation capabilities. Necessary mathematical derivations supporting the theoretical framework of the principle and the final conclusion are detailed in the paper.