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Practical Problems in Implementation of Open Access : Discom Perspective

Practical Problems in Implementation of Open Access : Discom Perspective



Mr. Ashok Sethi
Vice President, Tata Power
at RPR 2012, 23-26 August, Goa, India



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    Practical Problems in Implementation of Open Access : Discom Perspective Practical Problems in Implementation of Open Access : Discom Perspective Presentation Transcript

    • Presentation Title ( Arial, Font size 28 )Practical Problems in Implementation of Open Date, Venue, etc..( Arial, Font Access : Discom Perspective size 18 ) Organised by IPPAI, 24th Aug 2012, Goa Disclaimer: Views expressed in this presentation are personal. …Message Box ( Arial, Font size 18 Bold)
    • Partial Open Access Spin-Off:Cross-subsidised OA consumer Consumer Load Curve Asks local Discom to provide the peak power at regulated rate Consumer procures Base Load demand through Open Access • EFFECT: Local DISCOM has to procure the most expensive power of the day  increases its power purchase cost  raises the overall tariff  affects even the Non-Open Access consumers • RESULT: DISCOM consumer is subsidizing power purchase cost of the Open Access Consumer. • Since peak power generation has not matured, inability to procure peak power could lead to shortage at peak and subsequent effects. • SOLUTION: Full Open Access …Message Box ( Arial, Font size 18 Bold) 2
    • Partial Open Access:Operationalisation Issues Issues: How to supply OA and regulated power to same consumer through single meter? – Issues of accounting – Single Meter – Two characteristics of Consumers • Solution: – Bifurcate the supply into two separate meters …Message Box ( Arial, Font size 18 Bold)
    • Who pays the Alimony… Additional Surcharge Stranded Generation Assets Consumer Types • Regulator approved & Valid PPAs till 2017-18 • If OA consumers start moving out then DISCOM will be left with stranded Generation <1 MVA >1 MVA assets Potentially/Deemed OA Consumers • Fixed costs to be paid as per PPAs Who Pays…. No easy choices!! Additional Fixed Charges to be borne by Consumers• Additional Surcharge on OA Consumer will 1.53 nullify benefit of cheaper OA power 1.37 Rs/unit 1.25• Loading remaining consumers of DISCOM – 1.14 Non OA consumers subsidize OA Consumers 0.98 1.05 0.91 0.85 0.8• Void the existing PPAs and renegotiate – not a 0.76 simple commercial endeavor 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % of > 1 MVA consumer moving out as OA Consumers …Message Box ( Arial, Font size 18 Bold) 4
    • Increased Loading of Existing Discom ConsumerTechnical Minimum Issue …Message Box ( Arial, Font size 18 Bold)
    • Load Management, Scheduling & EnergyAccounting G<>T T<>D D<>C Monitored and controlled by New Front opened due SLDCs et all to OA, at 33 to 11 KV • If SLDCs were to also monitor the D<>C interface also then system will become very complex and will require significant up-grade in existing systems • Follow Shunglu Committee recommendation – “ ….. every distribution utility needs a centralized load dispatch centre for demand projection as well as for managing its operation and maintenance functions including managing open access and energy accounting.” • DISCOM will need robust IT system to handle settlement transactions similar to that of SLDC and will require actual demand of the open access customer for monitoring on real time basis. …Message Box ( Arial, Font size 18 Bold) 6
    • Distribution Grid Discipline • Distribution Grid Discipline is essential to ensure the quality of power supply in the distribution network. • DISCOM Load Management Centers should also be provided necessary powers for implementing suitable disciplinary actions for repeat/regular offenders whose actions lead to grid imbalance. • Further, Regulator needs to come out with the suitable Distribution Grid Code which is along the same line as the State Grid Code, to ensure Distribution Grid Discipline. • Wheeling charges and surcharges may be levied as per the regulations/act …Message Box ( Arial, Font size 18 Bold)
    • Website: www.tatapower.comEmail ID: asethi@tatapower.comContact No: +91 22 6717 1640 …Message Box ( Arial, Font size 18 Bold)