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Compliance to directives of kerc

This article discusses the importance of complying with KERC directives for maintaining transmission system availability and implementing effective reactive power compensation. It also highlights the need for energy audits, prevention of electrical accidents, and the reduction of transmission losses.

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Compliance to directives of kerc

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  1. Compliance to directives of kerc

  2. Directives as per KERC Tariff Order • Reactive Power Compensation and Restoration of failed capacitors • Transmission System Availability (TSA) • Energy Audit • Prevention on Electrical Accidents • Capital Works Programme

  3. Reactive Power Compensation and Restoration of failed capacitors • Effective Reactive Power Management • Achieving improvement in bus voltages • Reduction in Transmission Losses • Minimize/avoidance of payment of reactive energy charges to the CTU Action to be taken: KPTCL shall take timely action to restore all the failed capacitors as and when they fail and submit monthly status reports.

  4. Present Status

  5. Transmission System Availability • The Target Availability for intra-state transmission availability shall be 98% • Recovery of fixed charges below the level of target availability shall be on pro-rata basis. At zero availability, no transmission charges shall be payable. • KERC in its MYT Regulations - 2006 has stated that KPTCL shall maintain a minimum of 98% Availability for recovery of full transmission charges.

  6. Procedure for calculation of Availability • Availability shall be calculated and declared separately for each voltage level The transmission elements shall be grouped into following categories. a) AC transmission lines: Each circuit of AC transmission line shall be considered as one element. b) Inter-Connecting Transformers(ICTs): Each ICT bank( three Single phase transformer together) shall form one element.

  7. Procedure for calculation of Availability …Contd c) Static VAR Compensator(SVC): SVC along with SVC transformer shall form one element. 50% credit to inductive and 50% to capacitive rating shall be given. d) Switched Bus Reactor: Each switched Bus Reactor shall be considered as one element.

  8. Formula for calculation of Transmission System Availability % TSA = o x AV₀ + p x AVp+ q x AVq+ r x AVrX 100 o+p+q+r Where , o = Total Number of AC lines AV₀ = Availability of o number of AC lines p = Total number of switched bus reactors Avp =Availability of p number of switched bus reactors q = Total number of ICTs Avq= Availability of q number of ICTs r = Total number of SVCs AVr =Availability of r number of SVCs

  9. Availability of AC line(AV0) =Sum (Wi(TI-TNAI) /TI) Where, Wi=Ckt Length in km X SIL in MW TI = Total Time in Hours TNAI=Unscheduled interruption in Hours

  10. Weightage factor for each category of transmission elements shall be as under: a) For each circuit of AC line- Surge Impedance loading (SIL) multiplied by Circuit Km. ( SIL rating for various voltage level and conductor configuration shall be as per the procedure adopted for power system analysis) b) For each ICT- The rated MVA capacity c) For SVC- The rated MVAR capacity d)For Switched Bus Reactor: The rated MVAR capacity.

  11. Present Status

  12. Energy Audit • Metering equipment procurement and installation to be completed • Accuracy class of CT/PT shall match with that of meters • Rating of Meters Regularly Action to be taken: KPTCL shall furnish voltage wise losses on monthly basis. KPTCL shall maintain the entire interface metering system in healthy condition.

  13. Present Status

  14. Prevention of Electrical Accidents Rectification of the identified hazardous locations to be expedited and completed within the target Action to be taken: Measures to prevent electrical accidents by conducting regular review of such works. Necessary action for continuous safety awareness campaign on electrical safety aspects . Submit action plan for prevention of electrical accidents in transmission lines and substations.

  15. Prevention of Electrical Accidents – 4th Qrtr of FY19

  16. Generally Reported Hazardous locations • Low Ground Clearances • Houses are constructed near line corridor • Road Clearances • Single Tension/Single suspension Insulator

  17. THANK YOU

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