King Island: Maximising RE to minimise operating cost David Brown – Implementation Manager Hybrid Off-Grid Solutions Hybrid Off-Grid Solutions Drivers • Off-grid power systems are typically diesel based: Reliable, low capital cost, mature, simple  but high opex cost ($400-1,000/ MWh) o • Utilisation of RE reduces cost by displacing diesel (diesel is >75% of opex costs) • Adding renewable energy is challenging – managing variability • • Key to increasing RE penetration and project return is INTEGRATION o Integration is Hydro Tasmania’s core off-grid capability Hybrid off-grid development is now commercially attractive: o Increasing maturity and cost competitiveness of RE o Sustained high oil (diesel) prices 2 Case Study King Island Hybrid Off Grid System Overview and Performance Summary King Island Location Source: Google Earth King Island – Hybrid Off-Grid System Achievements to Date Population approx. 1,600 2.5MW peak load • • • • • • Constructed in 1988 6MW diesel generation Expensive to operate Excellent wind resource Incentive to use Renewable Energy 2.45MW of Wind 100kW Solar 5 King Island Renewable Energy Integration Program (KIREIP) 2010 - 2013 KIREIP - integrate enabling technologies to achieve 100% renewable generation, save more diesel and achieve an economic return Targeting: >65% RE annual contribution 100% RE instantaneous >95% GHG reduction KIREIP : Control System • Advanced automated system purpose for hybrid systems: • Automates dispatch of RE, diesel generation, enablers • Flexible: modules for Wind, Solar, Batteries, Flywheels, Demand response, Dynamic Resistor • Capable: Automatically manages from 100% diesel to 100% RE • Adaptable: Able to be used on any off-grid or fringe of grid system Example Control Display Screen Dynamic Resistor Effective Spill Management • Converts wind spill to raise / lower reserve • Allows diesels to run at minimum load • Controls system frequency • Low capital cost • Additional diesel saving 9 KIREIP : Diesel UPS 2x1MVA Flywheel based UPS • • • • • Supports addition of renewable energy and energy storage Integrated flywheel and generator unit – synchronised to network D-UPS provides the security of diesels without the fuel cost Enabler for Zero Diesel Operation (ZDO) Additional system stability and reliability benefits 1. 2. 3. 4. Diesel engine Electromagnetic Clutch Synchronous Motor/Clutch Flywheel KIREIP: Diesel-UPS : October 2012 15 hours of ZDO in a day – real proven performance 12 13 Multiple Roles: • Power response • Raise & lower reserve • Block shifting • Future frequency control Results in: • Extended ZDO • Diesel saving Battery Installation • Enhanced reliability Energy Storage 14 KIREIP : Demand Side Response Overview • • • • • • DSM system provides load regulation in response to RE variation Wi-fi connection to customer load, real time load monitoring & control Shedding non-critical load (e.g. residential electric hot water) PV switching in response to local over voltage Turning customer demand and distributed PV into controllable generation Fast response (<1 sec) allows these to be used for ancillary services Smart Grid Dispatches during Zero Diesel 08/03/2014 Customer smart phone app KIREIP : In-line Biodiesel Blending KIREIP : Recent Performance Record performance since D-UPS commissioning (pre-battery) • >50% diesel saving in August and October • >200hrs of Zero Diesel Operation • > 40% annual RE contribution 2013 •Battery will increase ZDO 100% Renewable with use of RE generation only Hydro Tasmania Hybrid Off-Grid Solution Offering • • A complete integrated solution for off-grid systems, including: • • Automated control system • Implementation of Renewable Energy (RE) technologies (wind, PV, hydro) Integration “enablers” (e.g. Storage, Flywheels, Dynamic resistors, Demand response) Technology agnostic. Offer systems that optimize savings and maintain system reliability • • Solution tailored to clients requirements OEM sourced via competitive tender • Full spectrum experience in asset life-cycle (design, develop, own, operate, maintain) • Services from advisory to implementation 22 Hydro Tasmania Off-Grid Power Systems Capability Hydro Tasmania – Off-Grid expertise: • Responsible for generation, distribution and retail in the Bass Strait Islands • • Serving industrial, commercial and residential customers Responsible for system security and reliability • Developer, Owner and Operator of King Island system – our test bed • Consultant : Leading consultant to Aid Agencies and Utilities, including: • Pitcairn, Chatham, Cape Barren Islands, Yap 23 Thank you Further information: Hybrid Off-Grid Power Systems David Brown [email protected] www.kireip.com.au