Singapore CEEA, Oct 2010 Chris Winter, CTO RedFlow Energy Storage, renewables and the Smart Grid: Technology and business case considerations
Energy Storage, Renewables and the Smart Grid Typical Smart Home vision, courtesy of EPRI, USA. Smart Grid elements Renewables Communications and control Energy Storage Look in more detail based on RedFlow s field experience
Energy Australia Smart Home Energy Australia, the largest electricity utility in Australia, has built a Smart Home in Sydney. This is part of their $300m SmartGrid, Smart City project beginning this year. 28 Jul 10 www. redflow.com.au Slide 3
Case study: Urban Smart Grid Smart Home installation in Sydney, Australia Urban residential site with multiple electricity generators and loads Key learning System required to manage electricity flows (not a HAN) RedFlow provided Turn-key soln for house electricity management
Case Study: Rural Smart Grid Reducing peak demand on the SWER network, Australia 1. Background Overloaded long rural feeders are expensive to upgrade 60,000+ km s of Single Wire Earth Return (SWER) 25,000 customers (<3 customers per kilometre) Predominantly built in 70 s and 80 s in Queensland 2.The Utilities Strategic Drivers Life extension of ageing and stressed network Demand management tools to mitigate peakier loads Increasing customer expectations for service quality Ergon Energy Netwrok, Queensland, Australia 3.The Solution Deploy multiple distributed batteries Use real-time comms & control a Rural Smart Grid
Rural Smart Grid - Interim results Reducing peak demand on the SWER network, Australia One 5kW/20kWh battery per 6-8 residential customers provides 15-25% peak load reduction Strongest business case today for Energy Storage, Renewables and the Smart Grid is in rural areas with few customers per mile
Case Study: Value proposition Reducing peak demand on the SWER network, Australia 1. For a SWER system (50 connection points & 125 miles of line) A$3m to re-conductor SWER line A$9.8m to augment to single phase A$12.8m to augment to 3-phase vs. A$1m to install RedFlow battery system 2. Best value proposition when, Low to moderate customer density Chronically stressed network Generally low growth area Peaky load profile (less battery needed) Note: energy storage system must be designed to allow utility access/control Load (kva) 140 120 100 80 60 40 20 0 Time of Day 0:00 3:00 6:00 Network Load Curves 9:00 12:00 15:00 Adjusted LoadTypical Load 18:0 0 21:00 24:00
Summary of RedFlow s field experience: Energy Storage, RE and the Smart Grid Business case Stronger in rural areas Renewable energy - PV dominant in urban areas (more government support), however RE is not critical for the SmartGrid SmartGrid high cost systems are not required to obtain the bulk of the SmartGrid benefits Energy Storage Stationary storage contributes to the solution. Electric Vehicles contribute to the problem. Technology Renewables - PV more effective in small systems than wind or fuel cells SmartGrid technology a small number of features provide bulk of benefits (80/20 rule) and are easier to deploy successfully Energy Storage Battery technology must be suited to daily discharges over 2-3 hour peak demand periods. High energy application rather than high power application.
RedFlow 5kW SmartGrid RedFlow s SmartGrid-ready Distributed Energy Storage System The RedFlow 5kW is a complete energy storage solution. Includes up to three Zinc-Bromine modules (ZBM s) (10 kwh to 30 kwh in daily cycling use). 5kW SMA inverter. (10kW 3-phase option possible) Smaller footprint 3kW system also available Full communications via 3G phone network (satellite option) Ready for PV-solar connection Supplied as a factory assembled and ready-to-run unit.
RedFlow s ZBM flow battery 10kWh Zinc-Bromine battery - building block for larger systems Key competitive advantages Much lower cost targeting a manufactured cost of 40% of conventional high performance lead acid batteries. Designed for daily 100% depth of discharge operation. Covered by patent applications. Designed for mass-manufacture Technical features Flowing electrolyte, zinc-bromine battery. Developed specifically for high energy throughput & low cost. Compact and light weight. Primarily manufactured from plastic. Typically 4 hour charge, 4 hour discharge. Target cycle life >>1000. Repairable and fully recyclable RedFlow ZBM battery compared with lead-acid Both have10 kwh of energy available daily. RedFlow zinc bromine module Conventional VRLA lead acid (220 kg) (1,200 kg)