Duck Curve
The Duck Curve describes the net load profile on an electricity grid, characterized by a steep ramp-up in the evening as solar generation drops and demand peaks. It highlights the challenge of balancing intermittent renewable energy with traditional baseload power.
Key Dynamics
- Midday Dip: High solar penetration causes net demand to plummet, often to near zero or negative values.
- Evening Ramp: Rapid increase in demand as solar output vanishes, requiring flexible peaking plants.
- Price Volatility: Can lead to negative wholesale prices during the day and extreme spikes in the evening.
Mitigation Strategies
- Energy Storage: Battery Energy Storage System and pumped hydro absorb midday surplus and discharge during peak hours.
- Demand Response: Shifting flexible loads to midday hours.
- Grid Interconnection: Sharing surplus capacity with neighboring regions.
Case Study: Australia
Recent developments in Australia demonstrate a successful transformation of the Duck Curve dynamics through aggressive battery deployment.
- Price Reduction: Electricity prices for most households and small businesses are dropping due to the flattening of the net load curve.
- Role of Batteries: Large-scale battery systems are driving down prices by arbitraging energy (storing cheap midday solar and selling during peak evening hours).
- Source Analysis: See Australia’s Duck Curve Transformed: Batteries Drive Lower Electricity Prices for a detailed breakdown of this economic shift.
- Video Reference: Australia’s Duck Curve Transformed: Batteries Drive Lower Electricity Prices by Engineering with Rosie.
Related Concepts
- Renewable Energy Integration
- Peak Shaving
- Negative Pricing
- Solar Photovoltaic