ELECTRICAL POWER SYSTEM STUDY

 

  • Study of existing protection system of plant, suggestions and renovations for plant betterment.
  • Recommendations for renovation and revamping switchgears, protective relay and protective schemes.

 

FAULT LEVEL AND SHORT CIRCUIT CALCULATIONS

  • Verification of authenticity of existing switchgear rating as per the, system operating conditions of the plant.

 

  • Fault level calculations can from a guideline for feasibility of existing switchgear for further expansion programmers.

 

RELAY CO-ORDINATION AND RELAY SETTINGS

 

  • Recommendation of over current and Earth Fault relay settings to achieve proper grading of over current relays and to avoid frequent mal-operation problems if any.

 

Recommendation for unit protection relay settings based on the equipment data sheets and the protection functions of the existing unit protection relay.      

  • Recommendations for the change of the type of the existing relay if found improper as per the standard applications.

 

  • The non- availability of the in-evitable protections necessary as per the standard application of protection for particular electrical equipment is highlighted along with the consequences.
  • Physical setting of the relay as per the settings recommended in the report.

 

    ENGINEERING OF PROTECTIVE RELAYING SCHEMES

     

            • Restricted Earth Fault (REF) Protection scheme for Transformers.
            • Bus Bar Differential protection schemes.

           

          • Transformer and Generator Differential Protection schemes.
          • Protective Relaying scheme for Generator as well as for

 

  • Parallel operation of Generator with Grid or parallel operation of Generators. Load Shedding Schemes for prevention of the collapse of in-plant generation under overload condition.
  • Modification of HT panel having time limit shunt fuse system into protective relays.