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Sardar Sarovar Power Complex

ESTABLISHMENT OF ENERGY MANAGEMENT CENTRE BY NCA

The Power complex of Sardar Sarovar project (SSP) comprises of two power houses, the Canal Head Power House (CHPH) having five Units of 50 MW each and the River Bed Power House (RBPH) with six Units of 200 MW capacity having reversible features. The Narmada Water Disputes Tribunal (NWDT) in its Award has given detailed instructions regarding the operation of these Power Houses. The Award stipulates that the power generated at the SSP complex is to be shared among the three States of Madhya Pradesh, Maharashtra and Gujarat in the following proportion:

MADHYA PRADESH   57%
MAHARASHTRA    27%
GUJARAT      16%

Further, Sub clause 8 under Clause 14.9.1 of the Award states as follows:

"The scheme of operation of the Power House including the power and load required by the party States during different part of the day shall be settled between the States at least one week before the commencement of every month and shall not be altered during the month except under agreement among the States or under emergencies. If and when SSP complex gets linked with the Regional or national Power Grid, the operation of the SSP complex will be governed by such altered system conditions. But in that event, the Narmada Control Authority should arrange to take such steps as are necessary to enable the three States of Gujarat, Maharashtra and Madhya Pradesh to get their entitlement of power and energy from the SSP complex according to these orders."

Keeping in view the above stipulations, the Power Sub Committee of NCA in its various meetings discussed the measures to be adopted to enable NCA to discharge its statutory responsibility. The sub-Committee after considering the existing Load Despatch facilities in the Western Region, decided that an Energy Management Centre (EMC) be established at Indore, with the facility for real time monitoring of generation and transmission of power from SSP complex through Real Time Computer Links with Western Region Load Despatch Centre (WRLDC) and SSP.

The scheme for establishment of Energy Management Centre was formulated in consultation with Central Electricity Authority. The scheme provides for installation of Micro Processor based Remote Terminal Units (RTUs) at CHPH and RBPH. These RTUs will continuously monitor generation and transmission of Power from SSP as well as the frequency and voltage at CHPH and RBPH buses.

 
Front view of Energy Management Centre

The PC based Supervisory Control and Data Acquisition System (SCADA) installed at EMC, Indore, will display the data received from WRLDC, Mumbai. The following functions will be performed in EMC at Indore.
  1. Monitoring of generation of power at CHPH and RBPH.
  2. Allocation of power generated at SSP among the participating states.
  3. Monitoring of withdrawal of power by participating States according to the allocation made above.
  4. Scheduling of generation at CHPH and RBPH considering the water to be released in the Canal, inflows into the Sardar Sarovar as informed by Hydromet Group of office and anticipated power requirement as assessed by WRLDC.
  5. Energy accounting in respect of withdrawal of energy by beneficiary States against their share.
  6. Scheduling of periodic maintenance of generating units at SSP and transmission lines emanating from SSP.
Since the RBPH Units will be operating in generating as well as pumping modes, monitoring of power flow has to be done in both the directions with facility to record energy transactions with reference to time.
To facilitate this, sophisticated Electronics Time of Day (TOD) meters are to be installed at SSP under the EMC scheme. These meters will record energy transmission to various states in the time blocks of fifteen minutes and transmit the same to EMC, Indore.
The infrastructure for housing the SCADA equipment (e.g. air-conditioning, UPS etc.) has been installed in EMC. The installation of RTUs/SCADA equipment is in progress at various sites. The EMC is expected to be operational by the time the first unit of SSP is synchronised.


(Click to view the communication line diagram)


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