The Oldest Sub-Station in Trivandrum: Paruthipara
110KV SUB-STATION PARUTHIPARA
INTRODUCTION
The hydel power development in Kerala began with the commissioning of Pallivasal hydro electric project in 1940. Next few decades saw the progressive developments of various schemes. The Paruthipara substation is the oldest substation in Trivandrum. There are 4 main feeders into this substation .it consists of a upper yard and a lower yard. The upper yard has the 2 feeders from Pothencode substation. These are 110kv feeders. The power basically comes from the Sabarigiri power project via Edamon and Pothencode. The substation supplies power in 2 ratings -66kv and 11kv. The 66kv supply feeds the following:TVT1,TVT2,Veli,terls. The 11kv supply feeds the following :Attingal,TVM East, Engineeringcollege, Vydyuthibhavan, Medicalcollege, Pattoor(Ulloor), Nedumangad, Kilimanoor, Aruvikkara, Peroorkada, Kowdiar. From the station 2 feeders of 110kv capacities are directed to medical college substation and are called TMC lines .
COMPONENTS OF THE SUBSTATION The power transformers are used to step down the voltage. The transformer core is made of high grade non-ageing cold rolled grain oriented steel laminations. the cooling is provided by means of ONAN(Oil Natural Air Natural)and ONAF(Oil Natural Air Forced). There are fans rotating at very high speed near to fins (used to increase the surface area).
Tap changing mechanism is provided for maintaining the secondary voltage constant with varying primary voltage. Tap changing causes change in leakage reactance, core loss, I2R loss etc. the tap changing means changing the turns ratio. The tapings are provided on the HV side so that it carries minimum current.
Tank is welded construction. It is stiffened by structured steel. It is provided with 2F earth terminals. HV and LV bushings are transported in crates.
Conservator is a cylindrical tank divided into 2 chambers –one for the main tank and other for OLTC. The function of the main conservator is to
INTRODUCTION
The hydel power development in Kerala began with the commissioning of Pallivasal hydro electric project in 1940. Next few decades saw the progressive developments of various schemes. The Paruthipara substation is the oldest substation in Trivandrum. There are 4 main feeders into this substation .it consists of a upper yard and a lower yard. The upper yard has the 2 feeders from Pothencode substation. These are 110kv feeders. The power basically comes from the Sabarigiri power project via Edamon and Pothencode. The substation supplies power in 2 ratings -66kv and 11kv. The 66kv supply feeds the following:TVT1,TVT2,Veli,terls. The 11kv supply feeds the following :Attingal,TVM East, Engineeringcollege, Vydyuthibhavan, Medicalcollege, Pattoor(Ulloor), Nedumangad, Kilimanoor, Aruvikkara, Peroorkada, Kowdiar. From the station 2 feeders of 110kv capacities are directed to medical college substation and are called TMC lines .
COMPONENTS OF THE SUBSTATION The power transformers are used to step down the voltage. The transformer core is made of high grade non-ageing cold rolled grain oriented steel laminations. the cooling is provided by means of ONAN(Oil Natural Air Natural)and ONAF(Oil Natural Air Forced). There are fans rotating at very high speed near to fins (used to increase the surface area).
Tap changing mechanism is provided for maintaining the secondary voltage constant with varying primary voltage. Tap changing causes change in leakage reactance, core loss, I2R loss etc. the tap changing means changing the turns ratio. The tapings are provided on the HV side so that it carries minimum current.
Tank is welded construction. It is stiffened by structured steel. It is provided with 2F earth terminals. HV and LV bushings are transported in crates.
Conservator is a cylindrical tank divided into 2 chambers –one for the main tank and other for OLTC. The function of the main conservator is to