Authors: WEO Energy Analysts Stéphanie Bouckaert, Timothy Goodson and Brent Wanner
As a fundamental rule, electricity supply and demand must be balanced at all times. Traditionally, this has been achieved by adjusting electricity supply to match demand that varies at different times of the day. But this poses a problem as the share of power generation from variable renewables such as wind and solar PV rises. Demand-side response is one of several measures that can help integrate higher shares of variable renewables, including electricity storage, greater interconnection and more flexible power plants.
When the sun is shining and the wind blowing, electricity generation from these sources may exceed demand, leading to the curtailment of otherwise low-cost and carbon-free electricity. Inversely, when the wind doesn’t blow or on cloudy days, power systems may need to rely on flexible yet expensive and carbon-intensive sources of generation. Both of these outcomes are economically and environmentally undesirable.
Demand-side response can significantly reduce such outcomes by shifting and shaping electricity demand to match the availability of renewables-based electricity generation.
Traditionally demand-side response has been confined to large-scale industrial consumers manually shedding demand in times of system stress. But over 75% of the global potential in demand-side response lies in buildings, with space heating, water heating and air conditioning loads contributing the most. The thermal inertia of buildings and hot-water storage allows electricity demand from heating and cooling equipment to be shifted in time to suit the needs of the grid at low cost without compromising user comfort. Loads from appliances such as refrigerators and washing machines can also become demand-side response resources, facilitated by the growing market share of smart appliances.
Expanding demand-side response – beyond manual shedding of large loads – is a relatively recent phenomenon, with Europe and the United States currently leading growth. In several markets consumers can receive payment for various forms of short-duration “fast frequency response” to keep the grid in balance, larger volumes of “load shifting” to respond to changeable weather, or contracts for guaranteed changes to future consumption patterns.
In addition to balancing loads, demand-side response measures can provide benefits to the grid by mitigating congestion in transmission and distribution systems and delaying or avoiding network upgrades, resulting in important savings. Power systems with greater flexibility are also better able to respond to short-term variations in electricity supply or demand that can be created by sudden changes in output from variable renewables-based generators.
The flexibility provided by demand-side response is therefore both a valuable resource facilitating the integration of a high share of variable renewables, and a symbol of the shift away from the traditional paradigm of supply following demand.
Identifying demand-side response potential
Globally, the theoretical potential of demand-side response today is estimated to be nearly 4,000 TWh per year, or more than 15% of total electricity demand (WEO 2017). Based on IEA modelling of electricity consumption profiles by end-use, this potential represents the sum of all loads than can be shifted for every hour of the year.
In the central scenario of the World Energy Outlook 2017, annual demand-side response potential is expected to increase to almost 7,000 TWh by 2040, the buildings sector leads future growth as demand for appliances and electric heating and cooling expands in Asia and Africa. Within developed economies, the electrification of heating and transport are major drivers of future growth. Smart charging of electric vehicles (EVs) uses charging (and discharging) of EV batteries to facilitate balancing of the power grid.
The IEA estimates that by 2040 almost 1 billion households and 11 billion appliances could participate in demand response programmes. While the majority of potential may lie in buildings, this potential can also be the most difficult to tap. This is especially the case in residential buildings, where participating in demand-side response programs may require behaviour change while offering limited economic benefits to households due to the small size of residential loads. As such, aggregation and automation of small scale demand-side response resources is often the most viable path to market for the residential sector.
The demand-side response potential in industry and large commercial buildings can be more accessible, as energy management systems optimize decisions to consume electricity or offer demand-side response services to the market.
Connectivity as a key enabler
Digital connectivity is the key to expanding demand-side response into new sectors and realising a greater share of its total theoretical potential. By enabling the linking, monitoring, aggregation and control of large numbers of individual pieces of electricity consuming equipment, connectivity allows for matching demand to the needs of the overall system in real time (Digitalization & Energy, 2017). Smart meters, smart appliances, electric vehicles and load management software are therefore central to efforts to increase demand-side response resources.
Capitalizing on demand-side response potential also requires appropriate price signals and regulatory frameworks to incentivize participation. Retail tariff structures such as time-of-use pricing or real-time pricing can deliver the necessary price signals to consumers, while enabling aggregators and other demand-side resources to participate in wholesale energy, capacity and ancillary services markets can create the necessary environment to stimulate investment.
Demand-side resources active in markets today represent only the tip of the iceberg in terms of the total potential. Digitalisation presents an opportunity to unlock this enormous potential and significantly enhance grid flexibility. As prices for digital technologies continue to fall and electricity consuming equipment is increasingly connected and controllable, expansion of demand-side response becomes technically feasible and economically attractive.
Electricity consumers benefit from reduced electricity bills by providing demand response services, but even larger savings are realised on a system level. Digitally enabled demand response is often a more cost-effective and climate-friendly measure facilitating the integration of variable renewables than building new power plants or electricity storage. Rapid expansion will act as a key accelerator for the clean energy transition. Moving forward, government policy will need to provide clear rules and a long-term vision for increasing demand-side response resources.
First published in International Energy Agency
Indonesia’s ‘Superheroines’ Empowered with Renewables
About a third of Indonesians, roughly 80 million people, live without electricity and many more with only unreliable access. In the country’s eastern Solor archipelago, a programme is looking to tackle this issue with an innovative approach, by empowering women with renewable solutions for rural and remote communities.
“In rural Indonesia, energy poverty affects men and women differently and there is a clear and important intersection between energy access and gender equality,” says Sergina Loncle, the Communications Manager at Kopernik, a non-profit organisation headquartered in Indonesia. “Although women have been traditionally restricted from access to information, assets and resources, in many cases they generally are the decision makers on energy issues at the household level, which makes the inter-linkages between energy and gender more pronounced.”
Kopernik believes that empowering women to become micro-social-entrepreneurs will help boost incomes and make clean energy technologies available in off-grid communities. To support this, the organisation launched Wonder Women, or in Indonesian, Ibu Inspirasi, which literally means inspirational women and mothers, says Loncle. The Wonder Women programme gives Indonesian women solar technologies on consignment and shares a margin on every sale — boosting the ability of women to support their families, helping to reduce the problems associated with inadequate and dangerous energy technologies, and improving the quality of life within the community.
A Kopernik survey suggests the programme is working. Reports show that after 12 months 26% of ‘Wonder Women’ know how to run a business and 21% become more empowered within their families — taking on a greater role in household decision making. Almost half of the survey’s respondents perceived an improvement in their self-status and 19% have increased their empowerment within the community.
Women in the programme are inspirational figures in their villages as they help make clean energy technology available to friends, relatives and neighbours, explains Loncle. Wonder women often become a pillar of support and inspiration for other women in the village, encouraging them to join the programme or support other business ventures.
“I am grateful because people in my community now use affordable, clean energy technologies,” says Maria Nogo, a Wonder Woman in Larantuka, East Flores who has been a part of the programme since March 2015. “By becoming a Wonder Woman, besides saving money, I also have opportunities to introduce these technologies to the people in my community, so I can support them to have a better life.”
A better life with renewables
In its market analysis for Southeast Asia, IRENA supports the Wonder Women programme and advocates for the host of socioeconomic benefits renewables bring to Indonesia and the countries in its region. IRENA shows that renewable energy solutions can reduce fuel expenditures — which drains the limited resources of the poor — and decentralised renewable energy access can substantially reduce poverty by empowering individuals and communities to gain control over their energy supply and reduce their energy spending.
“Over 206,000 Indonesians are directly employed in the renewable energy sector, but there is growing body of evidence that renewable energy solutions support income generation and job creation beyond the energy supply chain,” says Rabia Ferroukhi, Head of IRENA’s Policy Unit and Deputy Director of its Knowledge, Policy and Finance Centre. She says renewables enable technologies that contribute to improved health, access to education, clean water and good nutrition, and can increase economic productivity.
To better assess the economic benefits of decentralised renewable energy in rural areas, poor urban communities, and remote islands of South East Asia, IRENA advises policy makers to look beyond the consumptive uses of energy (e.g. household lighting, cooking) and to also consider its productive uses.
“In remote and rural areas, like those found in Indonesia, renewables are not only the most cost-effective way to provide energy access, they’re a reliable way to support social services and economic development, and that’s a strong reason for governments in the region to support programmes like Wonder Women,” Ferroukhi adds.
Economic value of energy efficiency can drive reductions in global CO2 emissions
Ambitious energy efficiency policies can keep global energy demand and energy-related carbon-dioxide (CO₂) emissions steady until 2050, according to a new report by the International Energy Agency. Perspectives for the Energy Transition: The Role of Energy Efficiency shows that despite a near-tripling of the world economy and a global population that increases by nearly 2.3 billion, end-use energy efficiency alone can deliver 35% of the cumulative CO₂ savings through 2050 required to meet global climate goals.
Global energy demand grew by 2.1% in 2017 according to IEA estimates, more than twice the growth rate in 2016. At the same time, global energy-related CO₂ emissions increased for the first time in three years, as improvements in global energy efficiency slowed down dramatically to 1.7%.
“Among all energy trends in 2017, the one that worries me the most is the slowdown in energy efficiency improvements,” said Dr Fatih Birol, Executive Director of the International Energy Agency. “The rate of improvement that we saw is around half of the rate that is required to meet clean energy transition goals.”
IEA analysis in Perspectives for the Energy Transition: The Role of Energy Efficiency demonstrates that on top of a wide range of benefits including cleaner air, energy security, productivity and trade balance improvements, there is a compelling economic case for energy efficiency. But, without further policy efforts, these benefits are unlikely to be realised as less than a third of global final energy demand is covered by efficiency standards today.
Realising the full potential of energy efficiency will require a step-change in investments on the demand side of the energy equation, rising to USD 1.7 trillion per year through 2050, the majority of which is for energy efficiency and the electrification of transport. On the supply side, the focus is on reallocating investments towards renewables and other low-carbon technologies such as nuclear and carbon capture, utilisation and storage.
While the scale of the demand-side investment required may appear challenging, fuel cost savings over the lifetime of most technologies are larger than the investment required, which implies a strong economic benefit that arises from energy efficiency investment. Although there are still many low-hanging fruits that can pay back their initial investment quickly, payback periods are often too long to attract investment from consumers and businesses. Effective policy frameworks are needed to overcome economic and non-economic barriers to energy efficiency and to incentivise adoption of more efficient technologies.
Perspectives for the Energy Transition: The Role of Energy Efficiency demonstrates a compelling economic case for energy efficiency as being essential to make the energy transition affordable, faster and more beneficial to all. The IEA recommends that governments adopt a strategic approach to energy efficiency, supported by well-designed efficiency policies and a strong focus on implementation and enforcement.
Report: Powerful New Policy Options to Scale Up Renewables
A new report by the International Renewable Energy Agency (IRENA), the International Energy Agency (IEA), and the Renewable Energy Policy Network for the 21st Century (REN21), Renewable Energy Policies in a Time of Transition, is an unprecedented collaboration that sheds new light on the policy barriers to increased deployment of renewables and provides a range of options for policymakers to scale-up their ambitions.
Since 2012, renewable energy has accounted for more than half of capacity additions in the global power sector. In 2017 alone a record-breaking 167 GW of renewables capacity was added worldwide. 146 million people are now served by off-grid renewable power, and many small island developing states are advancing rapidly towards targets of 100% renewables.
One of the main rationales behind the call for a higher share of renewables in the energy mix is the urgent threat posed by climate change. Of the 194 parties to the United Nations Framework Convention on Climate Change 145 referred to renewable energy in their nationally determined contributions (NDCs), and 109 included quantified renewable energy targets. Air pollution is also a pressing issue, with an estimated 7.3 million premature deaths per year attributable to household and outdoor air pollution. Energy security is another influencing factor, with small island states particularly affected by security issues and resilience in the face of natural disasters. Finally, countries looking to expand energy access in rural areas are increasingly turning to renewables as the most cost-effective, cleanest and most secure option.
But the pace of the energy transition needs to be substantially accelerated to meet decarbonisation and sustainable development objectives. As outlined in IRENA’s recently-released Global Energy Transformation: A Roadmap to 2050, to achieve the two-degree goal of the Paris target, the share of renewables in the primary global energy supply must increase from 15% today to 65% by 2050. Gains in the electricity sector must be matched in end-use sectors such as heating and transportation, which together account for 80% of global energy consumption.
Renewable Energy Policies in a Time of Transition provides policymakers with a comprehensive understanding of the diverse policy options to support an accelerated development of renewables across sectors, technologies, country contexts, energy market structures, and policy objectives, to scale up renewable energy deployment. An updated joint classification of renewable energy policies to illustrate the latest policy developments around the world.
Key areas of focus:
Heating and Cooling
Heating accounted for over 50% of total final energy consumption in 2015, with over 70% of that met by fossil fuels. To increase the use of renewables, a range of policy instruments are required. These include mandates and obligations, which can offer greater certainty of increased deployment; building codes, which implicitly support renewable heating and cooling from renewables by setting energy performance requirements; renewable heat and energy efficiency policies that are closely aligned to leverage synergies and accelerate the pace of transition; fiscal and financial incentives, which reduce the capital costs of renewables; and carbon or energy taxes, which provide important price signals and reduce externalities.
Transport is the second largest energy end‑use sector, accounting for 29% of total final energy consumption in 2015, and 64.7% of world oil consumption. With the exception of biofuels, there is little practical experience of fostering renewables in transport. Policies and planning should help overcome the immaturity or high cost of certain technologies, inadequate energy infrastructure, sustainability considerations and slow acceptance among users as new technologies and systems are introduced. They should also build improved understanding between decision makers in the energy and transport sectors, so as to enable integrated planning and policy design. Removal of fossil fuel subsidies is also essential, especially in shipping and aviation.
Although the power sector consumed only about a fifth of total final energy consumption in 2015, it has received the most attention in terms of renewable energy support policy. Investments in the sector are largely driven by regulatory policies such as quotas and obligations and pricing instruments, supported by fiscal and financial incentives. Quotas and mandates cascade targets down to electricity producers and consumers, but require a robust framework to monitor and penalize non-compliance. Administratively set pricing policies (like feed-in tariffs and premiums) need to continuously adapt to changing market conditions and the falling cost of technology. Auctions are being increasingly adopted, given their ability for real-price discovery, and have resulted in a five-fold price reduction between 2010 and 2016, though auction design is crucial.
A number of countries and regions are reaching high penetrations of VRE in their power systems, and implementing policies to facilitate their system integration. Strategies for system integration of renewables are crucial to minimise negative impacts, maximize benefits and improve the cost effectiveness of the power system. As VRE shares grow in the power system, so do the challenges of system integration.
A wide range of policies have been adopted to support the growth of renewable energy around the world. The nature of those policies in a given country depends on the maturity of the sector, the particularities of the market segment, and wider socio-economic conditions. As this report shows, as deployment of renewable energy has grown and the sector has matured, policies must adapt and become more sophisticated to ensure the smooth integration of renewables into the wider energy system – including the end-use sectors – and a cost-effective and sustainable energy transition.
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