Grid Connected Storage Various Applications Realised with Proven Technologies Wilhelm van Butselaar Clean Energy Week 2013, Brisbane July 2013
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Why Grid Connected Storage? > Self consumption > Make the most out of your Renewable Energies > Backup > Brown Outs & Black Outs > Off-Grid > Residential with Diesel-Off- Mode > Short Term Storage (Clouds, Multiple Diesel) > Grid Management > Stabilisation of weak grids > Horizon Power Requirements > SWER Lines
Smart Homes System Solution for greater independence Functions > Energy Generation > Temporary Storage > Intelligent Planning and Control > Consumption > E-Mobility > Transparency > Intelligent Grid Connection Future-Proof Solutions > Cooperation with leading manufacturers in the areas of Smart Metering, Storage Technologies, Household Appliances, Heating and E-Mobility
Goals of a Smart Home Load Control > Increase of Self Consumption from at least 30% to at least 40%* > Automatic start of appliances at the ideal time of the day > 40% less energy consumption from utilities* > Transparency of all energy exchanges and flows as well as all power levels in the Smart Home System > More planning security and independence from future developments in the energy market > Intelligent Load management for increasing self consumption *All numbers are based on an energy production and consumption of 5,000kWh per year as well as a natural self consumption of 30%
Self Consumption With Storage > Maximum usage of electricity generated through own renewable energy > Full, Limited (Germany) or Zero Export to public grid
Flexible Storage System > Increasing the Self Consumption Rate from 30% to 65%* > Usage of Solar Energy 24/7 > Up to 65% less energy consumption from Utilities* > Maximum flexibility with Battery Capacity, Battery Type and Battery Power * All numbers are based on an energy production and consumption of 5,000kWh per year, a usable battery capacity of 5kWh and utilisation of a SUNNY HOME MANAGER
Self Consumption Without Storage
Self Consumption With Storage
Self Consumption Inverter Integrated Storage
Self Consumption External Storage
Flexible Storage System: Example Electricity Demand/Consumption PV Generation/Grid Feed-In Battery charge with PV energy PV Generation/Self-Consumption Battery discharge Power [W]
Finding the balance Increase of self-consumption kwh Utilisation of storage Batteriegröße Battery capacity kwh kwh Batteriepreis Battery price Degree N utzungsgrad* of utilisation % % % kwh % Economical optimum at 2 kwh* Storage capacity > The degree of utilisation decreases with increasing battery capacity while the costs increase proportionally > Energy consumption and Energy Usage Behaviour should be in an optimal relationship Inverter integrated Storage Systems are designed for maximum economic viability
Hybrid Backup and Self Consumption > Battery inverter switches over to Off- Grid > External switch isolates from public grid > Normally grid feeding system supplies loads with energy in case of an outage
Special Requirements > Ramp Rates > Horizon Power Requirements > SWER Lines > Voltage Stabilisation > Grid Management > Reactive Power, Voltage
Overview Storage in Hybrid Applications Off-Grid: Hybrid Energy Systems Residential > Off-Grid Systems > Applications with Battery Inverter, Wind, Diesel, Storage, Solar, Hydro > Up to 300kW PV power Industrial > PV-Diesel-Hybrid Systems > Typical for Mining, Factories, Farms, Communities > Fuel Save Applications > From 300kW PV power
1. Introduction 2. Self Consumption 3. Backup 4. Off-Grid 5. Grid Management
Industrial PV-Diesel Hybrid Systems
Industrial PV-Diesel Hybrid Systems
Large Scale Grid Connected Storage (From Jan 2014)
Grid Management > Active power limitation on demand (Low Voltage [LVG] and medium voltage grid [MVG]) Target: Reducing the active power of a PV-plant via remote signal > Frequency-dependent control of active power (Low Voltage [LVG] and medium voltage grid [MVG]) Frequency > 50,2 Hz reduction of active power Target: Reducing the active power in the grid > Reactive power setting (Low Voltage [LVG] and medium voltage grid [MVG]) Reactive power supply by fix cos ϕ, cos ϕ(t), cos ϕ(p) or Q(U) Target: Stabilise the voltage in the grid > Dynamic grid support (Medium voltage grid [MVG]) During a grid failure the inverter still stays on the grid (specific time and special cond Target: Stabilise the grid during grid failure