POWER SYSTEM STUDIES                   CURRENT UPDATES

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SR. NO.

CLIENT / SERVICES

TYPE OF JOB

6.0

PT Punj Lloyd, Kaltim Prima Coal (KPC), Sangatta, Indonesia 

November 2011

Consultancy services for carrying Electrical Power System Study for 

3 x 18 MW CPP at Sangatta.

Scope of work includes carrying out :

1.0       a.  Load Flow Study.

2.0       b.  Short Circuit Study.

3.0       c.  Motor Starting Analysis.

4.0       d.  Transient Stability Study.

5.0       e.  Harmonic Analysis.

6.0        f.  Relay Setting and Relay Coordination of Power Plant.

7.0       g.  Grounding Study.

 h.  Electromagnetic lighting and switching over voltage study for cables

      and transformers.

5.0

Shadeed Iron and Steel L.L.C., Oman   November 2011

･   a.  Electrical system data base report for power system study 

            modeling.

      b.  Key single line diagram indicating protection system.

･ Short Circuit Studies for,                           

      a.  Phase Faults

      b.  Earth Faults

･ Relay Setting & Relay Coordination

      a.  Phase over current relays

      b.  Earth fault over current relays

･  Unit protection settings for,

      a.  Transformers

      b.  MV Motors and LV Motors where motor protection relays are

            provided

4.0

British Gas Exploration and Production India Ltd., Panna

October 2011

Scope of Work :

a.  Site Visit and Data Collection

b.  Feasibility Studies for starting of important loads under Blackstart

     conditions.

c.  Hazard Analysis of the existing Blackstart equipment.

d.  Carry out detailed HAZID, HAZAN and Reliability, Availability,

     Maintainability studies.

e.  Voltage Dip Study

f.   Black start philosophy, sizing of various equipments and starting

     sequence.

3.0

British Gas Exploration and Production India Ltd., Tapti

October 2011

Scope of Work :

a.  Site Visit and Data Collection

b.  Feasibility Studies for starting of important loads under Blackstart

     conditions.

c.  Hazard Analysis of the existing Blackstart equipment.

d.  Carry out detailed HAZID, HAZAN and Reliability, Availability,

     Maintainability studies.

e.  Voltage Dip Study

f.   Black start philosophy, sizing of various equipments and starting

     sequence.

2.0

Petronet LNG Ltd., Bharuch (Gujarat)

July 2011

Scope of Work :

･   a.  Engineering a Grid Islanding Scheme (GIS)

      b.  Engineering a Load Shedding Scheme (LSS) for,                           

             i.   MW based Load Shedding

             ii.  Back up under frequency based Load Shedding

             iii. Maximum demand based Load Shedding

       c.  Engineer a Governor and AVR mode changeover scheme,

             wherever feasible.

       d.  Preparation and submission of GIS-LSS Panel / Component

             specification.

･   Carry out detail Transient Stability Study to identify the PLNG's  

       electrical system critical clearance time under extreme operating

       condition.

･   Work out settings of Grid Islanding and Load Shedding relay. (if any)

･   Carry out detail engineering wherever required,

        a.  Mounting of GIS components / panel

        b.  Wiring modification

                          OR

        c.  Preparation of control cable schedules if any.

        d.  Preparation of interconnection schedules if any.

1.0

HEG Limited, Bhopal

Design and Providing Consultancy Services for System Study.

Scope of work includes,

･  Harmonics Filter Design for Capacitor Bank : 

      a.  Advance along with order

       b.   i.  Normal operating conditions of generation and grid supply.

             ii. With Grid isolated and furnaces in normal operation.

       c.   Carry out Harmonic Analysis and submit the report for the

             measurement carried out to identify the specific orders of

             harmonics, required to be mitigated.

       d.   Based on the Harmonic Analysis report, carry out a Harmonic

             Filter design and submit functional specification of Harmonic filter

             components.

･ Event Sequence Recorder :

       a.  Advance along with order

       b.  Study and Identify the signals for,

             i.   Digital input and output commands for fault indication  &

             ii.  Analogue input and output commands for parameter

                  measurement

           Submit the list of above Input, Output list.

      c.  Prepare and submit purchase specification for a suitable event

           sequence recorder.

      d.  Carry out technical tender analysis for maximum 4 nos. eligible

           ESR vendors and submit recommendations for purchase.

      e.  Prepare and submit, engineering drawing for,

           i.   ESR layout

           ii.  ESR interconnection  &

           ii.  Control cable schedules for ESR.

･ GIS & Load Flow Study for VAR Compensation :

      a.  Advance along with order.

      b.  Electrical system modelling and submission of Key SLD based on

           the data provided by HEG and data compilation to perform further

           studies. The key SLD shall be prepared for the purpose of this  

           study only.

     c.   Engineer,

           i.  Grid islanding scheme

           ii. Load shedding scheme for continuous parallel operation of TG

               sets with the grid.

      d.  Carry out Load Flow studies :

           Based on the Load Flow study results, recommend the modes of

           TG set AVR for MVAR generation and operation philosophy of

           various Capacitor Banks.

      e.  Carry out Transient Stability study to derive the settings for various

            protection functions of only GIS & LSS scheme.