POWER GENERATION, TRANSMISSION DISTRIBUTION

BY

L.SHILLASUPERINTENDING ENGINEERING (GENERATION), UMIAM

MEGHALAYA ENERGY CORPORATION LIMITED

Generation Capacity in MeECL

Sl.No.

Name of Hydro Power Station (Existing)

Year of commisioning

No. of Unit

Capacity of each unit (MW)

Total Capacity (MW)

1 Umiam Stage-I, Sumer

1965 4 9 36

2 Umiam Stage-II, Umsumer

1970 2 9 18

3 Umiam Stage-III, Kyrdemkulai

1978 2 30 60

4 Umiam Stage-IV, Nongkhyllem

1972 2 30 60

5 Umtru , Dehal 1957 4 2.8 11.2

6 Sonapani MHP 2009 1 1.5 1.5

Total 186.7 MW

GENERATION IN MeECL

• POWER GENERATION IN MeECL ARE FROM HYDRO POWER STATIONS ONLY.

• ALL THE EXISTING HYDRO POWER STATIONS ARE IN UMIAM UMTRU BASIN.

UMIAM UMTRU BASIN

GENERATION IN MeECL

ALL THE POWER STATIONS UTILISED THE VERTICAL FRANCIS TURBINE EXCEPT FOR SONAPANI WHICH UTILISED HORIZONTAL PELTON WHEEL

VERTICAL FRANCIS TURBINE

FRANCIS RUNNER

PELTON WHEEL

MIV

DRAFT TUBE

GENERATOR

SECTION THROUGH POWER HOUSE

TURBINE

TRANSFORMER• THE POWER THAT HAS BEEN

GENERATED IN THE HYDROGENERATING UNIT AT 11KV IS FIRST CHANGED INTO HIGHER VOLTAGE FOR EASE OF TRANSMISSION THROUGH TRANSFORMER.

• THESE ARE CALLED GENERATING TRANSFORMER WHICH ARE AT 11KV IN LV SIDE AND 132 KV AT HV SIDE

SWITCHYARD

THE POWER FLOW NEED TO BE PROTECTED & MONITORED .THIS IS CARRIED OUT THROUGH SWITCHTARD EQUIPMENTS LIKE

CIRCUIT BREAKER, ISOLATOR,

CURRENT TRANSFORMER, POWER TRANSFORMER ETC.

TRANSMISSION

THE POWER FROM SWITCHYARD IS TRANSMITTED TO A HIGHER DISTANCE AT 132 KILOVOLT THROUGH THE TRANSMISSION LINES EITHER SINGLE CIRCUIT OR DOUBLE CIRCUIT

INTERCONNECTION

DISTRIBUTION

THE POWER AT HIGHER VOLTAGE HAS TO BE CHANGE TO LOWER VOLTAGE BEFORE IT CAN BE USED AT CUSTOMER END. THIS IS ACHIEVED BY DISTRIBUTION TRANSFORMER AND DISTRIBUTION LINES

CONTROL ROOM

THE POWER FLOW IN THE SYSTEM IS MONITORED AND CONTROLLED FROM CONTROL ROOM AND LOAD DISPATCH CENTRE