FEATURE ENERGY EFFICIENCY
MANAGING THE UNPREDICTABLE: Three challenges for renewable energy
Energy sector investments in big data technologies have exploded. In fact, according to a study by BDO, the industry’s expenditure on this technology in 2017 has increased by ten times compared to the previous year, with the firm attributing much of this growth to the need for improved management of renewables. Here, Alan Binning, regional sales manager at smart grid software provider COPA-DATA UK, explores three common issues for renewables - managing demand, combining distributed systems and reporting
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enewables are set to be the fastest- growing source of electrical energy generation in the next five years. However, this diversification of energy sources creates a challenge for existing infrastructure and systems. One of the most notable changes is the switch from reliable to fluctuating power.
IMPLEMENTING ENERGY STORAGE Traditional fossil-fuel plants operate at a pre- mitigated level, they provide a consistent and predictable amount of electricity. Renewables, on the other hand, are a much more unreliable source. For example, energy output from a solar farm can drop without warning due to clouds obscuring sunlight to the panels. Similarly, wind speeds cannot be reliably forecasted. To prepare for this fluctuation in advance, research and investment into energy storage systems are on the rise. Developing energy storage mechanisms is essential. Taking wind power as an example, the grid may not always be able to absorb excess wind power created by an unexpected windspeed increase. Ramp control applications allow the turbine to store this extra power in the battery instead. When combined with reliable live data, these systems can develop
informed models for intelligent distribution. Britain has recently become home to one of
the largest energy storage projects to use EV batteries. While it is not the first-time car batteries have been used for renewable power, the Pen y Cymoedd wind farm in Wales has connected a total of 500BMW i3 batteries to store excess power.
COMBINING DISTRIBUTED SYSTEMS Control software is the obvious solution to better monitor this fluctuating source of power. However, many renewable energy generation sites, like solar PV and wind farms, are distributed across a wide geographical scope and are therefore more difficult to manage without sophisticated software. Consider offshore wind farms as an example. The world’s soon-to-be-largest offshore wind farm is currently under construction 74.5 miles off the Yorkshire coastline. To accurately manage these vast generation sites, the data from each asset needs to be combined into a singular entity. This software should be able to combine many items of distributed equipment, whether that’s an entire wind park or several different forms of renewable energy sources, into one system to provide a complete visualisation of the grid. Operators could go one step further, by
overlaying geographical information systems (GIS) data into the software. This could provide a map-style view of renewable energy parks or even the entire generation asset base, allowing operators to zoom on the map to reveal greater levels of detail. This provides a full, functional map enabling organisations to make better informed decisions.
REPORTING ON RENEWABLES Controlling and monitoring renewable energy is the first step to better grid management. However, it is what energy companies do with the data generated from this equipment that will truly provide value. This is where reporting is necessary. Software for renewable energy should be able to visualise data in an understandable manner so that operators can see the types of data they truly care about. For example, wind farm owners tend to be investors and therefore generating profit is a key consideration. In this instance, the report should compare the output of a turbine and its associated profit to better inform the operator of its financial performance. Using intelligent software, like zenon
Analyzer, operators can generate a range of reports about any information they would like to assess — and the criteria can differ massively depending on the application and the objectives of the operator. Reporting can range from a basic table of outputs, to a much more sophisticated report that includes the site’s performance against certain key performance indicators (KPIs) and predictive analytics. These reports can be generated from archived or live operational data, allowing long term trends to be recognised as well as being able to react quickly to maximise efficiency of operation. As investments in renewable energy generation continue to increase, the need for big data technologies to manage these sites will also continue to grow. Managing these volatile energy sources is still a relatively new challenge. With the correct software to combine the data from these sites and report on their operation, energy companies will reap the rewards of these increasingly popular energy sources.
www.copadata.com
26 JULY/AUGUST 2018 | ELECTRICAL ENGINEERING
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