Vietnam Variable Speed Generator Market By Generator Type (Variable Speed Self Excited Induction Generator, Wound Rotor Induction Generator, Doubly Fed Induction Generator and Permanent Magnet Synchronous Generator), By Technology Type (Power Electronics-Based Variable Speed Generators and Mechanical Variable Speed Generators), By Power Rating (Up to 100 Kva, 100 Kva–1 Mva, 1–25 Mva and Above 25 M