Mike chapman-evolution-of-the-rural-network-stand-alone-power-system-pilot
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The document discusses stand-alone power systems (SPS) that Western Power has installed in remote areas as an alternative to extending the electricity grid. Six initial SPS units were installed in 2016 to electrify areas at the edge of the grid. The SPS units generate power using solar panels, batteries, and backup diesel generators. The document describes two case studies where customer usage exceeded the capacity of the SPS units, resulting in outages, and lessons learned about conducting more robust energy audits and clear communications with customers. It concludes that Western Power sees potential to deploy over 3,000 additional SPS systems as the technology replaces aging rural infrastructure.
Mike chapman-evolution-of-the-rural-network-stand-alone-power-system-pilot
- 1. Stand-alone Power System Pilot Mike Chapman Standards & Technology Engineer, Network Planning Evolution of the rural network
- 2. 101,097km circuit wire 254,920 km2 The SWIN 861,082 poles & towers 17,047GWh electricity transported About Western Power Build, maintain & operate transmission and distribution assets: South West Interconnected Network (SWIN) 1.1+ million customers 250,000 street lights 220,000 solar PV installations* 220 battery systems* * As at 1/10/17
- 3. History Edge of grid areas constructed under rural electrification policies 1950s - 1980s Many assets now reaching end of useful life and progressively due for renewal 3
- 4. History Six hybrid power SPS units installed in mid 2016 4 Site Spur# Spur Length (km) Average Daily Usage (kWh) SPS-01 1 13.8 42.4 SPS-02 1 13.8 47.9 SPS-03 1 13.8 28.0 SPS-04 2 5.9 28.3 SPS-05 2 5.9 12.8 SPS-06 3 10.4 28.7 Total: 30.1
- 5. System Specifications Installed & maintained for Western Power by Energy made Clean (EMC) 5 SPS Type SPS 10 SPS 20 SPS 30 SPS 40 30 minute Maximum Demand (Amps/Phase) 32 32 32 32 PV Nominal Rating (kWp) 4.5 9 13.5 18 Usable Battery Capacity (kWh @ 20 hour discharge rate) 20 40 60 80 Diesel Generator (kW) Prime Rating 12 24 24 24
- 6. Customer Engagement Ongoing research of customer perception of SPS vs Network supply 6
- 8. Power Quality Frequency 49.5-50.5 Hz (99% of the time) Voltage 240V (+/-6%) Western Power Technical Rules 8
- 9. Case Study #1: Non standard customer loads Air compressor on site with 5.5kW 480V single phase motor – 97A inrush current on start up Significantly exceeds the 44A 3 second peak capacity of inverters & 36A maximum allowable inrush current as per WADCM 9 Final solution was installation of third inverter (new 3 second peak of 66A) and replacement of customer compressor with 4.0kW model Learning: more robust energy audit process required and clearer customer communication on SPS unit capacity
- 10. Case Study #2: Pod 6 – Sheep dog muster Customer advised us on Tuesday 20/6/17 ~20 caravans on site from 21/6/17 until 25/6/17 for a “Sheep muster” event 10 SPS 20 Specifications 30 minute Maximum Demand (Amps/Phase) 32 PV Nominal Rating (kWp) 9 Usable Battery Capacity (kWh @ 20 hour discharge rate) 40 Diesel Generator (kW) Prime Rating 24
- 11. Case Study #2: Pod 6 – Sheep dog muster 11 Normal usage (14-18 June 17)
- 12. Case Study #2: Pod 6 – Sheep dog muster 12 Usage during customer’s event (21-25 June 17) Outage 1 (21kW) Outage 2 Single phase (15kW)
- 13. Case Study #2: Pod 6 – Sheep dog muster Learnings: Customers should not overload their electrical supply! 13
- 14. Our customers 14
- 15. What’s next? 3,000+ SPS network opportunities Statutory and regulatory changes We’re embracing new technologies to improve customer reliability 15 www.westernpower.com.au/energy-solutions
- 16. Electricity Networks Corporation trading as Western Power ABN 18 540 492 861 24/7 Emergency Line 13 13 51 General Enquires 13 10 87 TTY 1800 13 13 51 TIS 13 14 50 Email enquiry@westernpower.com.au Website westernpower.com.au