As per your request below I am providing you the list of top Power Energy companies located in India:

The list includes:

NTPC
Power Grid Corp
NHPC
Reliance Infra
Adani Power
Jaiprakash Pow
Tata Power
Reliance Power
Neyveli Lignite
Torrent Power
JSW Energy
SJVN
Rattan Power
CESC
Suzlon Energy
KSK Energy Vent
GVK Power
Guj Ind Power
Orient Green
Rattan Infra
Entegra
Schneider Elect
Suryachakra Pow
Indowind Energy
Advance Meter
BF Utilities

List of top power thermal plants in India:

Vindhyachal Thermal Power Station, Madhya Pradesh
Mundra Thermal Power Station, Gujarat
Mundra Ultra Mega Power Plant, Gujarat
Talcher Super Thermal Power Station, Odisha
Sipat Thermal Power Plant, Chhattisgarh
NTPC Dadri, Uttar Pradesh
NTPC Ramagundam, Andhra Pradesh
Korba Super Thermal Power Plant, Chattisgarh
Jharsuguda Thermal Power Plant, Odisha
Rihand Thermal Power Station, Uttar Pradesh