12 December 2017 2017 04:57 PM GMT

Renewable Future Challenges UK And Germany To Build Flexibility In Power Systems

Economic tipping points mean renewable energy will account for over half of electricity generation by the mid-2020s in the UK and Germany. This comes as the cost of generating energy from wind and solar is expected to more than halve from today’s levels by 2040. This rapid growth in variable renewables will lead to much greater volatility in power systems, challenging inflexible ‘baseload’ generators and creating opportunities for new flexible sources.

Due to the variable nature of wind and solar, there will be some days and even whole weeks where the total generation from renewable sources is more than enough to meet power demand in the UK and Germany. In certain weeks and months, however, low wind speeds coinciding with cloudy skies will require other generation sources to meet the majority of demand. The research shows that while there will be a significant increase in the amount of variable renewables on the system, the total backup capacity needed by 2040 in the UK and Germany will be much the same as in 2017.

These findings are part of an economic study released recently by Bloomberg New Energy Finance (BNEF) and commissioned by Eaton in partnership with the Renewable Energy Association (REA)The study – ‘Beyond the tipping point: flexibility gaps in future high-renewable energy systems in the UK, Germanand the Nordics’ – highlights that future energy systems in the UK and Germany with very high levels of variable renewable generation must be complemented by flexible resources, including energy storage.

Key findings of the study include:

  • At certain times, and with increasing frequency, wind and solar energy alone could meet – and even exceed – total power demand in both markets;
  • With more renewable supply comes more curtailment, but not to significant levels: in 2030, less than 1% of UK and 3% of German wind and solar generation is curtailed or ‘wasted’ due to oversupply. By 2040, this rises to 3% and 16% respectively;
  • Increased wind and solar generation results in more variable demand for other energy sources to plug power supply gaps. In this environment, flexible power technologies such as energy storage and gas generators will have an advantage. In addition, certain types of demand response such as flexible electric vehicle charging and variable industrial loads can respond quickly to conditions on the grid, or shift or consume surplus renewable energy;
  • As early as 2030, there will be whole weeks where wind and solar power generation exceed total demand at some point every day. This creates a very challenging environment for ‘baseload’ technologies that benefit from running at a constant stable output, such as nuclear, coal and lignite;
  • However, even in the 2040 scenarios, there will be some weeks and months where generation other than wind and solar must be called upon to meet the majority of demand. Such long ‘gaps’ cannot be filled with demand response and current energy storage technologies. A fleet of flexible resources will need to be maintained to meet these gaps, including gas generation, interconnectors and dispatchable renewable technologies such as bioenergy. In future, long-term storage solutions such as hydrogen may come into play too.

“This study highlights a seismic shift in how power systems will operate in the future. As wind and solar become the cheapest options for power generation, the race is on to develop and deploy the flexible resources that will complement them,” said Albert Cheung, head of global analysis at Bloomberg New Energy Finance.

“Eaton commissioned this economic study to understand the size of the challenge before exploring possible policy and technology responses, which will be the focus of the second part of the study to be released in early 2018,” said Louis Shaffer, distributed energy segment manager, Europe, Middle East and Africa Region at Eaton.

“These solutions could include continued promotion of smart metering, reforms to increase market openness and transparency for all grid ancillary services and long-term grid service contracts and pricing schemes. We will also analyse the benefits of various policy options for the future of the energy market that include battery storage,” added Shaffer.

“The study shows that wind and solar power are now the cheapest form of new build generation in many cases, and costs will continue to fall dramatically. Massive increases in future renewable power generation mean that industry and government must start planning now to ensure low-carbon, cost-effective ways of balancing demand and supply,” said Dr Nina Skorupska, chief executive of the Renewable Energy Association.

“We believe that there is a role for fuelled renewable technologies such as bioenergy and energy from waste to provide the complementary baseload generation that will be required, to avoid the need for carbon-intensive generation at all. This study shows that battery storage is well placed to serve short-term supply and demand issues and highlights the dramatic cost reductions in renewable power over the past few years,” added Skorupska.

Bloomberg New Energy Finance (BNEF) is an industry research firm focused on helping energy professionals generate opportunities. With a team of experts spread across six continents, BNEF provides independent analysis and insight, enabling decision-makers to navigate change in an evolving energy economy. Leveraging the most sophisticated new energy data sets in the world, BNEF synthesizes proprietary data into astute narratives that frame the financial, economic and policy implications of emerging energy technologies.

Eaton is a power management company with 2016 sales of $19.7 billion. We provide energy-efficient solutions that help our customers effectively manage electrical, hydraulic and mechanical power more efficiently, safely and sustainably. Eaton is dedicated to improving the quality of life and the environment through the use of power management technologies and services. Eaton has approximately 96,000 employees and sells products to customers in more than 175 countries.

The Renewable Energy Association represents renewable energy producers and supporting companies and promotes the use of all forms of renewable energy in the UK across power, heat, transport and recycling, it also is the leading trade body for energy storage and electric vehicle infrastructure. It is the largest renewable energy and clean technology trade association in the UK, with over 600 members, ranging from major multinationals to sole traders.

June 18th 2018
IET’s Renewable Power Generation Conference Comes To Copenhagen

The Institution of Engineering and Technology’s popular Renewable Power Generation conference will be making its first visit to Denmark this year. The conference, now in its 7th iteration, will be hosted by the Center for Electric Power and Energy at DTU, which also manages the world-class experiment platform for research and development of renewables integration – PowerLabDK. Over 180 new research papers will be presented at the conference. Attendees will be able to find out the latest ideas and thinking around wind power plant modelling and control; wave and tidal energy; renewable energy forecasting; power conversion and grid interaction; Hybrid systems combining multiple energy sources; the impact of distributed generation and use of HVDC.

June 20th 2018
Growth Of Renewables In Peru As Enel Opens Largest Wind Farm In Country

Enel is now Peru’s leading renewable energy generator with around 1.1 GW of installed capacity following the commissioning of Wayra I which, with more than 132 MW, is now Peru’s largest wind farm. Built in approximately a year and comprising 42 wind turbines of 3 MW over each, it’s expected to produce 600 GWh per year; enough to avoid the annual emission of over 285,000 tonnes of CO2 into the atmosphere. The energy generated by the wind farm is being delivered to the Peruvian transmission grid (SEIN) through the Poroma substation. The project is supported by a 20-year energy supply contract with Peru’s Ministry of Energy and Mines.

June 20th 2018
Battery Boom: Wind And Solar Can Generate Half Of Worldwide Electricity By 2050

Coal is to shrink to just 11% of global electricity generation by mid-century, from 38% now, as costs shift heavily in favour of wind, solar and batteries. Wind and solar are set to surge to almost “50 by 50” – 50% of world generation by 2050 due to reductions in cost. “Cheap battery storage means that it becomes increasingly possible to finesse the delivery of electricity from wind and solar so that these technologies can help meet demand even when the wind isn’t blowing and the sun isn’t shining. The result will be renewables eating up more and more of the existing market for coal, gas and nuclear.”

June 19th 2018
ABB Microgrid In South Australia Strengths Power Grid And Improves Reliability

ABB will supply a microgrid solution to the Energy Storage for Commercial Renewable Integration (ESCRI) project, which will provide a more secure power supply in an area that has high renewable penetration into the grid. The solution will connect an ABB Ability PowerStore 30 megawatt (MW) battery energy storage solution to the Electranet transmission system enabling the value stacking of storage in the regulated energy market, improving power reliability. ABB has installed over 40 such global sites, serving remote communities, islands, utilities and industrial campuses.

June 14th 2018
Major Wins For Solar As EU Increases Renewable Energy Target

The European Parliament, European Council and European Commission have agreed to a binding 32% EU renewable energy target for 2030, up from the original proposal of 27%. James Watson, CEO SolarPower Europe commented ‘The deal is a good one for solar. We see a much more ambitious target than was expected just a few months ago and importantly we have a strong framework for self-consumption and prosumers. Households wake up this morning with the knowledge that they will have a new right – the right to self-generate, consume and store the energy they produce. This is a major achievement.