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creating sustainable change through education, communication and leadership © 2012 GSES P/L Training • Consulting • Engineering • Publications
Dwipen Boruah
Administrative procedures for providing
grid connection to rooftop solar PV projects
creating sustainable change through education, communication and leadership © 2012 GSES P/L creating sustainable change through education, communication and leadership © 2012 GSES P/L
Contents
• Implementation steps for rooftop PV projects
• Procedure for interconnection approval
• Implementation framework and institutional setup of utility
• Architecture of various types of metering systems
• Commercial settlement aspects
creating sustainable change through education, communication and leadership © 2012 GSES P/L creating sustainable change through education, communication and leadership © 2012 GSES P/L
Implementation steps for rooftop solar PV projects
STEP 1:
Submission of application for
interconnection with:
• Consumer information
• PV system capacity
• Other required information
STEP 3:
• Installation of system
• Testing of system
• Call for inspection & interconnection
STEP 2:
Screening and preliminary approval
• General screening
• Technical feasibility
• Approval
STEP 4:
• Inspection and commissioning of PV
system
• Chief Electrical Inspector/ Third party
inspection as applicable
CONSUMER’S ACTIVITIES DISCOM’S ACTIVITIES
creating sustainable change through education, communication and leadership © 2012 GSES P/L creating sustainable change through education, communication and leadership © 2012 GSES P/L
Delhi Example BSES, BYPL & NDPL
Submit application to DISCOM
Receive acknowledgement
from DISCOM
Completion of Feasibility analysis by
DISCOM
Approval from DISCOM for net
metering
Submit Registration application
Receive Acknowledgement
Receive a Registration Number
DISCOM will execute connection agreement
Installation of PV system and net-
meter
30
day
s
7 days 3
0 d
ays
45 days
30
day
s 1
5 d
ays
creating sustainable change through education, communication and leadership © 2012 GSES P/L creating sustainable change through education, communication and leadership © 2012 GSES P/L
Rooftop PV System Capacity Approving Authority
Up to 10kWp Assistant Executive Engineer (AEE) of the
concerned Sub-division of DISCOM
Above 10kWp capacity up to
100kWp
Additional Chief Electrical Inspector of the
Department of Electrical Inspectorate
Above 100kWp Chief Electrical Inspector to Govt. (CEIG)
The maximum permissible capacity for rooftop shall be
1 MW for a single net-metering point.
Delhi Example BSES, BYPL & NDPL
creating sustainable change through education, communication and leadership © 2012 GSES P/L
1. Applicant downloads the application format and guidelines from the BESCOM website
2. Submits the applications form online or offline duly attaching / enclosing the required documents
3. Pay registration fee at Sub- division.
STEP 1:
APPLICATION PROCESS
Karnataka example - BESCOM
1. Upon review at Sub- division, Assistant Executive Engineer issues approval letter for LT installations while Executive Engineer (EE) issues approval letter for HT installations.
STEP 2:
REVIEW OF APPLICATION
1. Applicant get the PV system installed 2. Applicant pays facilitation fee, procures bi-directional meter,
gets it tested at MT division and submits test reports. 3. AEE/EE(O & M) sub-division signs PPA with consumer.
STEP 3:
INSTALLATION
creating sustainable change through education, communication and leadership © 2012 GSES P/L
1. Applicant request for commissioning of system 2. AEE/EE (O&M) tests, commissions and synchronizes PV system. 3. If PV system fails any of the commissioning tests – utility
provides suggestion and reasons for failure 4. Applicant takes corrective measures and apply for
commissioning the system again 5. If PV system passes all the tests, utility issue certificate of
synchronization
STEP 4:
TESTING & COMMISSIONING
Karnataka example - BESCOM
1. Utility issues certification of synchronization to applicant. 2. File is sent to Revenue Section in O&M Sub – division for billing
STEP 5:
METERING AND BILLING
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Procedure for interconnection approval
Step – 0 Information Access and Establishing Communication Cannel
Accessing
Requirements
for
Interconnection
Process
Utility Requirements
• To develop Information Manual, Guidebooks , Forms/Formats etc. for consumers
• To develop an effective system for commination with consumer in the form of a
web portal, emails, establishing an individual cell /department etc.
• To designate an officer or employee for education consumer on interconnection
process
• To develop a system for tracking status of application form and Grievances
registered in similar matter
• To update real time status of application request /Grievances
Consumer Requirements
• Collate Information from the designated officer or any other communication
cannel.
• Fill-in the pre-application form with all the required information
• Submission of application for and processing fees and required documents
• Getting acknowledgement receipt from the utility
• Tracking of application request
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Step - 1 General Screening of Application form
General
Application
screening
(7 Days)
• On receiving the information on interconnection process, Applicant will collect the
pre-application form
• Applicant will submit the application form to the utility with all required
attachments and processing fees
• On receiving of pre-application, utility will provide acknowledgement receipt to the
applicant
• Receipt number will help the applicant for checking the status of its application
• Utility will go for general review of application form and if find suitable utility will
clear the application request for next stage.
• Under general review, utility will check the Applicant’s general information,
location of proposed interconnection, Capacity of Rooftop Facility, Available
capacity at DT level
Step-2 Technical Screening of Application form
Seeking
Technical
Information
(7 Days)
• Once the application clear the general screening process, then utility require
technical information for Interconnection study
• For this, Applicant needs to fill in the technical details and attached supporting
documents to proceed with the application process.
• Technical details to be submitted after receiving request from utility within 7 days
Procedure for interconnection approval
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Step -3 Submission of additional Documents
Documents to be
submitted with
technical
Information
• Documentation of Site control needs to be submitted with the application form,
the documents required are as follows
• Ownership of roof
• NOC from the owner (in case of leasehold property)
• Approval from structural Engineer
• Electrical Line diagram of the rooftop facility and location of Manual
disconnect switch
• Safety Equipment, Equipment specs. and other supporting documents
Step-4 Additional Information for Processing of application form
Notice for
Additional
Information
(10 Days)
• The Consumer will submit the duly filled application form to utility
• If required, Utility will send a notice to the applicant for additional information
required to process the application form.
• On receiving the application form, Consumer will have to respond within 10
business days to utility, failing to which will result in cancellation of application
request
Step -5 Modification of Interconnection Request (if Required)
Procedure for interconnection approval
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Step-6 Pre-application request & Utility Feasibility Study
Technical
Screening
(20 Days)
• Consumer is required to fill the pre- application request with non-refundable
processing fees for utility to access the feasibility of interconnection at proposed
feeder.
• Based on information provided by the consumer, Utility will check the feasibility
of proposed interconnection by evaluating the following parameters
• Total capacity (in MW) of substation/area bus, bank or circuit likely to
serve the proposed Point of Interconnection
• Existing aggregate generation capacity (in MW) , Aggregate queued
generation capacity (in MW), Available capacity (in MW) interconnected at
the proposed Point of Interconnection.
• Approximate circuit distance between the proposed Interconnection and
substation
• Load flow analysis and Number of protective device between the proposed
Point of Interconnection and the substation/area
• Number of phases available at the proposed Point of Interconnection. If
single phase, distance from the three-phase circuit
• Checking, If the Point of Interconnection is located on a spot network, grid
network, or radial supply
Procedure for interconnection approval
creating sustainable change through education, communication and leadership © 2012 GSES P/L
12
Implemnation framework and institutional setup of utility
Utility HQ
Division
Sub-Division
Sub Station
• Framing guidelines, manual, forms/formats, agreements etc.
• Approving equipment suppliers, equipment models, meters etc.
• Managing the overall implementation framework
• Organizing training programs for utility staff and key stakeholders
• Establishing multiple communication channels for consumers
• Signing of commercial agreements / PPA
• Monitoring Grievance/Complaints registered by the consumer
• Recording and managing operations of the grievance handling cell
• Metering, billing and payment
• Records of applications and consumers
• Application screening and interconnection approvals
• Receiving feedback and addressing complaints
• Providing information to consumers about application process
• General and technical feasibility study of application form
• Before and post installation Inspection of solar rooftop facility
• Commissioning and synchronization of solar rooftop facility
• Meter reading and maintenance of safety of the network
Indicative roles and responsibility Utility Setup
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Stage I: Approval of electrical drawings
The following documents shall be furnished for obtaining approval of drawings:
• Requisition letter of the owner / tenant of the installation
• Computer print / Blue print of electrical drawings showing: Single line
diagram of the installation indicating rating, size and details of protection,
details of loading, net metering system (Bi-directional)
• Site plan locating the proposed rooftop solar equipments
• Plan and elevation of the Solar unit, inverter unit and control panel showing
all round clearances etc.
• Details of earthing provided for the proposed installation
Approval Process example
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Stage I: Approval of electrical drawings
• Requisite fees paid receipt/challan for drawing approval
• NOC issued from Supply Company (Discom), to the consumer indicating
registration number of installation
• NOC issued from SNA, if MNRE subsidies are claimed by the consumer.
• Copy of Licensed Electrical Contractor and Supervisor permit duly endorsed
in favour of LEC
• Authorization of owner of the installation to the Licensed Electrical
Contractor.
• Estimate and agreement made with the Licensed Electrical Contractor and
consumer shall be executed
Approval Process example
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Stage II: Inspection and issue of safety approval
• After completion of solar roof top installation work, the following documents
shall be submitted by the consumer for pre-commissioning inspection.
• Requisition letter of the owner/tenant of the installation
• Work completion report the prescribed format which is duly signed by Licensed
Electrical Contractor, Concerned Supervisor and the prospective consumer.
• Requisite inspection fees paid receipt /challan as per fees notification.
• Manufacturers test report of the solar roof top installation & Calibration report
of Energy meter and connected current transformers and protective relays if
any.
• List of authorized persons who will operate at the said installation.
Approval Process example
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Stage II: Inspection and issue of safety approval
• At the time of inspection a responsible representative of the Consumer /
Electrical supervisor should be present along with testing instruments.
• The defects pointed out during the inspection should be rectified in order to
bring the installation in general conformity with the CEA (Measures Relating
to Safety and Electric Supply) Regulations, 2010 and a rectification report
signed by the consumer, and contractor should be sent to the jurisdictional
officer of the Electrical Inspectorate.
• After verification of the compliance report by the inspecting officer safety
approval will be granted under Regulation 32 of CEA (Measures Relating to
Safety and Electric Supply) Regulations, 2010
Approval Process example
creating sustainable change through education, communication and leadership © 2012 GSES P/L
GRID
Distribution Transformer
Conventional Meter
Consumer’s Premises
Metering and billing - Conventional Architecture
creating sustainable change through education, communication and leadership © 2012 GSES P/L
GRID
Distribution Transformer
Consumer’s Premises
Meter
PV Modules Grid-Tied Inverter FEED-IN METER: - Meter for accounting of solar
energy generated.
Gross Metering System Architecture
creating sustainable change through education, communication and leadership © 2012 GSES P/L
GRID
Distribution Transformer
Consumer’s Premises
Net Meter
PV Modules Grid-Tied Inverter
Optional Meter
SOLAR ACCOUNTING METER: - Meter for accounting of
solar energy generated.
- Necessary for computing RPO compliance.
- Alternatively: Solar Energy Generated
=Optional M. – Net M.
Net Metering System Architecture
creating sustainable change through education, communication and leadership © 2012 GSES P/L
GRID
Distribution Transformer
Consumer’s Premises
Net Meter
PV Modules Grid-Tied Inverter
Consumption Meter
PCU
- Separate AC Solar Energy Meter might not be possible.
- Alternatively: Solar Energy Generated
=Consump. M. – Net M.
Hybrid Net Metering System Architecture
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Billing Concept : Net – Metered Case 1
2 kWh
3 kWh 1 kWh
Utility Bills for 1 kWh Net
Consumption to the consumer
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Billing Concept : Net – Metered Case 2
5 kWh
3 kWh 2 kWh
Utility pays for 2 kWh Net
Generation by the consumer
creating sustainable change through education, communication and leadership © 2012 GSES P/L
Billing Concept : Gross – Metered
5 kWh
3 kWh 5 kWh
Utility pays for 5 kWh Gross
Generation by the consumer
creating sustainable change through education, communication and leadership © 2012 GSES P/L
• Net meter measures energy from and to utility grid
• Net result of energy consumed / exported at the end of billing cycle recorded
• Energy settlement cycle normally is existing billing cycle
• Consumer pays for net consumed units, if any
• Net exported units, if any, carried forward to next cycle
• At the end of settlement period (normally financial year) utility pays to
consumer for units net exported to grid, if any
• Tariff for consumed energy equal to applicable regular consumer tariff
decided by SERC from time to time
• Tariff for exported energy as per interconnection agreement – either equal to
APPC of the year or FIT for RTPV as decided by the SERC
Commercial Settlement Framework for Net metering
creating sustainable change through education, communication and leadership © 2012 GSES P/L
THANK YOU
Contact Details:
GSES India Sustainable Energy Pvt. Ltd.,
F-7B, Okhla Industrial Area Phase 1, New Delhi - 110020
Phone: +91-11-40587622; Mobile: +91 9560550075
e-mail: [email protected]; www.gses.in