western power distribution presentation distributed community energy low carbon south west business...
TRANSCRIPT
LOW CARBON BUSINESS BREAKFASTA PRACTICAL GUIDE TO THE GRID CONNECTION PROCESS AND A LOOK AT ALTERNATIVE CONNECTION OPTIONS
Steven Gough
Innovation and Low Carbon Network Engineer
Western Power Distribution DG Levels
Integration of DG
Western Power Distribution DG Levels
• 7.8 Million Customers
• 55,000 sq km area
• 216,000 kms of linear assets
• 184,000 substations
• DG Capacity Connected up to Q3 2014 – MVA
• DG Connected March to September 2014 – MVA
• DG Capacity Offered and Accepted – MVA
Integration of DG
4,100
640
8,800
Integration of DG
LOW CARBON
TECHNOLOGIES
LOW CARBON GENERATION
VOLTAGE RISE/DROP VOLTAGE STABILITYHARMONIC IMPACTTHERMAL CAPACITY
BI-DIRECTIONAL ENERGY FLOWEQUIPMENT SUITABILITYPOWER FACTORFAULT LEVEL
Challenges of Connecting DG
The connection process
• Submit application to New Supplies on a ENA form with relevant plans
• Application sent to the relevant department
• We clarify any additional information
• We prepare the Connection Offer Letter which included the connection and reinforcement costs
• You need to accept the Offer Letter and pay the deposit
• The works are started
Top Tip - If you need a cost indication you can request a Budget Estimate free of charge without applying for a full offer or have a discussion with your planner
Integration of DG
Generation Capacity Maps
• Estimated capacity on 11kV/LV substations• Highlighted 33kV with voltage or thermal issues• Generation Capacity Register• Greater visibility of our network.
Integration of DG
TIMED
• Generation curtailed within specific times
• Sub 1MVA
• Modelled seasonal capacity variations
• Localised control only
• No comms
• May have for voltage constraint
• Non-optimised
SOFT-INTERTRIP
• Releases pre-fault capacity with trip facility
• 11kV and 33kV
• Real-time monitored values
• Small clusters of generation or simple pinch points
• Existing monitoring with localised control
ACTIVE NETWORK MANAGEMENT
• Fully optimises capacity based on all constraints
• Management of generation using LIFO principles
• Real-time granular control of output
• Requires new Active Network Management control and monitoring systems
Costs, Complexity & Network Optimisation
101010110100
Integration of DG
Alternative Connections
