More predictable renewable energy could lower costs

Wind farm

Credit: iStock

Lower electricity costs for consumers and more reliable clean energy could be some of the benefits of a new study by the 成人大片 researchers who have examined how predictable solar or wind energy generation is and the impact of it on profits in the electricity market.

PhD candidate Sahand Karimi-Arpanahi and Dr Ali Pourmousavi Kani, Senior Lecturer from the University鈥檚 School of Electrical and Mechanical Engineering, have looked at different ways of achieving more predictable renewable energy with the aim of saving millions of dollars in operating costs, prevent clean energy spillage, and deliver lower-cost electricity.

鈥淥ne of the biggest challenges in the renewable energy sector is being able to reliably predict the amount of power generated,鈥 said Mr Karimi-Arpanahi.

鈥淥wners of solar and wind farms sell their energy to the market ahead of time before it is generated; however, there are sizable penalties if they don鈥檛 produce what they promise, which can add up to millions of dollars annually.

鈥淧eaks and troughs are the reality of this form of power generation, however using predictability of energy generation as part of the decision to locate a solar or wind farm means that we can minimise supply fluctuations and better plan for them.鈥

The team鈥檚 research, published in the data science journal , analysed six existing solar farms located in NSW and selected up to nine alternative sites, comparing the sites based on the current analysis parameters and when the predictability factor was also considered.

The data showed that the optimal location changed when the predictability of energy generation was considered and led to a significant increase in the potential revenue generated by the site.

鈥淧eaks and troughs are the reality of this form of power generation, however using predictability of energy generation as part of the decision to locate a solar or wind farm means that we can minimise supply fluctuations and better plan for them.鈥Sahand Karimi-Arpanahi

Dr Pourmousavi Kani said the findings of this paper will be significant for the energy industry in planning new solar and wind farms and public policy design.

鈥淩esearchers and practitioners in the energy sector have often overlooked this aspect, but hopefully our study will lead to change in the industry, better returns for investors, and lower prices for the customer,鈥 he said.

鈥淭he predictability of solar energy generation is the lowest in SA each year from August to October while it is highest in NSW during the same period.

鈥淚n the event of proper interconnection between the two states, the more predictable power from NSW could be used to manage the higher uncertainties in the SA power grid during that time.鈥

The researchers鈥 analysis of the fluctuations in energy output from solar farms may be applied to other applications in the energy industry.

鈥淭he average predictability of renewable generation in each state can also inform power system operators and market participants in determining the time frame for the annual maintenance of their assets, ensuring the availability of enough reserve requirements when renewable resources have lower predictability,鈥 said Dr Pourmousavi Kani.

Tagged in featured story, renewable energy, wind farms, solar farms