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LV Network Modelling. Keith Dryden Project Engineer. LCNF Conference 2012. Overview. Drivers Existing Power Analysis Tool Aim Data Flow Diagram Implementation Existing GIS data Transfer to Electric Office Transfer to CYMDIST Load and Generation Profile Manager Load Flow Analysis - PowerPoint PPT Presentation
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LV Network Modelling
Keith DrydenProject Engineer
LCNF Conference 2012
– Drivers– Existing Power Analysis Tool– Aim– Data Flow Diagram– Implementation
– Existing GIS data– Transfer to Electric Office– Transfer to CYMDIST
– Load and Generation Profile Manager– Load Flow Analysis– User Cases– Summary
Overview
Drivers
• Problem statement– There is a need to enhance the capability of SSEPD’s
operational Information Systems, to facilitate the anticipated development of the low voltage network
– Modelling tools require accurate network data, but re-drawing of the network in the chosen package is time-consuming and costly, with scope for introducing error
– Traditional methods of modelling electrical networks rely on accurate customer loading data; this will become more important when Small-Scale Embedded Generation (SSEG) / Distributed Generation is added to the system.
CABLE TYPES USED IN THIS NETWORK Node 1 to Substation 100: WAVE 300mm, 25m
Node 1 to Node 2 Tapered section 1: WAVE 95mm, 180m Tapered section 2: WAVE 185mm, 70m Node 1 to Node 3: WAVE 300mm, 25m
Node 3 to Node 4 Tapered section 1: WAVE 95mm, 160m Tapered section 2: WAVE 185mm, 90m
Node 3 to Node 5: WAVE 185mm, 25m
Node 5 to Node 6Tapered section 1: WAVE 95mm, 135m Tapered section 2: WAVE 185mm, 115m
Node 5 to Node 7: WAVE 185mm, 25m
Node 7 to Node 8 Tapered section 1: WAVE 95mm, 110m Tapered section 2: WAVE 185mm, 140m
Node 7 to Node 9: WAVE 95mm, 25m
Node 11 to Substation 100: WAVE 185mm, 1m
11
2 1
3 4
6 5
7 8
9
Existing Power Analysis Tool
Power Analysis Tool Evaluation
• Three Power Analysis Tools evaluated
CYMDIST from CYMEPowerFactory from DigSilent WinDEBUT from EA Technologies
• Chose CYMDIST
Energy Profile HandlingIntegration options with Smallworld Electric Office Engagement with the supplier, CYME
Aim
• To Model an LV network capturing data electronically from old and new information systems.
– Customer Network data in GIS transferred into suitable format
– Integration of Network Modelling Environment with Power
Analysis Tool
– Modelling and management of new low carbon
devices/distributed generation
– Accept half hourly load profiles
– Run multiple scenarios or variants e.g. 1 day / 1 month / 1 year
Data flow diagram
Implementation – Existing GIS data
Implementation – Transfer to Electric Office
– Large expandable
database facility.
– Electric Office allocates
customer phasing.
– Single line representation
of 3 phase connectivity.
Implementation – Transfer to CYMDIST
– Re-creates network
– Performs calculations on
data
– Sends to the results to
Electric Office
– Normal use - no visibility
– Selected users can access
for in-depth analysis
Load Flow Analysis
CYMDIST Load Distribution
Load and Generation Profile Manager
• Energy Profiles Manager in CYMDIST • Multi Year, future and past • Individual End Points / Customer Types • Load and Generation • Analysis for specific time points, and ranges
User Cases
• Operational Staff– Quick and simple method of confirming a back-feed or mobile
generation is within limits
• Desktop quoter– Simple check against whether new load or generation can
connect onto network
• Network planner
– Allow modelling of load/generation growth up to 5 years in
advance. New large scale development planning.
Summary
– Appropriate modelling tool evaluated and tested with Electric Office
– Proof of concept model completed – tested with various load profiles
– User cases established
– Forms the basis of the system for use in the
New Thames Valley Vision project
END