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Problem Statement: A typical solar power plant that may generate its full capacity in the afternoons. However, the power plant should limit its power export based on load demand. Due to government subsidies, solar power producing plants were profitable earlier in 2012. However, the scenario later altered, not due to a lack of government encouragement, but due to a dramatic shift in the load curve. Root-cause: The "duck curve" is a term commonly used in the context of grid-connected photovoltaic (PV) systems, particularly in the context of electricity generation from solar power. It refers to a graphical representation of the net electricity demand on the grid over the course of a day, considering the impact of solar energy generation. The name "duck curve" comes from the shape of the graph, which resembles a duck with its head and beak facing downward. The curve typically shows three key features: 1. Morning Ramp (up to 6.00AM): In the early morning hours, before the sun rises or when the solar generation is low, the demand for electricity is relatively high. This is because people are waking up, turning on lights, appliances, and starting their daily activities. This is the "tail" of the duck. 2. Morning between 6.00AM to 10.00AM or Morning Ramp-Down: As the sun rises, solar panels start to produce electricity, but since most people are not at home or businesses aren't fully operational yet, the demand for electricity is low. 3. Mid-Day Trough: As the sun rises and solar PV generation increases, it starts to offset a significant portion of the electricity demand. During sunny hours, when solar generation is at its peak, the overall electricity demand on the grid decreases, leading to a "trough" in the curve. This causes a dip in the curve, forming the "belly" of the duck. 4. Evening Ramp: Towards the evening, something interesting happens, as the sun sets and solar generation decreases, electricity demand rises again. People return home, turn on lights, appliances, and air conditioning, leading to an increase in electricity consumption. This forms the "neck" of the duck. 5. Finally, in the late evening, the demand for electricity gradually decreases as people go to bed, forming the "head" of the duck. Solution: One of the Chapter in My PhD thesis 1. Reddivari, R., & Jena, D. (2022). Improved Gamma type Y-source inverter for rooftop PV based VG applications. International Journal of Electrical Power & Energy Systems, 142, 108261. https://lnkd.in/gmHDQXme 2. Reddivari, R., & Jena, D. (2021). A low voltage harvesting in photovoltaic generation systems using negative embedded Z‐source inverter. International Transactions on Electrical Energy Systems, 31(9), e13018. https://lnkd.in/gR2Ms5_7 #solarenergy #ongridsolar #Duckcurve #solarenergysolutions #gridconnection #pvsystem #gridstability
Can we try to generate solar power to supplement renewable energy to the grid, and waste it, even worse, destablize the grid, at the same time? Yes. And that challenge is presented by the so called “Duck curve” - the paradox of demand trough at the peak of the sun, and peak demand when the sun’s down. In order to meet the demands and maintain efficiency and stability, grid’s power generators need to be sustainably operating throughout the day. That’s not what happen during the day when people not at home, and solar power’s up. #solarpower #renewableenergy
