Skip to main content
About HEC About HEC
Summer School Summer School
Faculty & Research Faculty & Research
Master’s programs Master’s programs
Bachelor Programs Bachelor Programs
MBA Programs MBA Programs
PhD Program PhD Program
Executive Education Executive Education
HEC Online HEC Online
About HEC
Overview Overview
Who
We Are
Who
We Are
Egalité des chances Egalité des chances
HEC Talents HEC Talents
International International
Sustainability Sustainability
Diversity
& Inclusion
Diversity
& Inclusion
The HEC
Foundation
The HEC
Foundation
Campus life Campus life
Activity Reports Activity Reports
Summer School
Youth Programs Youth Programs
Summer programs Summer programs
Online Programs Online Programs
Faculty & Research
Overview Overview
Faculty Directory Faculty Directory
Departments Departments
Centers Centers
Chairs Chairs
Grants Grants
Knowledge@HEC Knowledge@HEC
Master’s programs
Master in
Management
Master in
Management
Master's
Programs
Master's
Programs
Double Degree
Programs
Double Degree
Programs
Bachelor
Programs
Bachelor
Programs
Summer
Programs
Summer
Programs
Exchange
students
Exchange
students
Student
Life
Student
Life
Our
Difference
Our
Difference
Bachelor Programs
Overview Overview
Course content Course content
Admissions Admissions
Fees and Financing Fees and Financing
MBA Programs
MBA MBA
Executive MBA Executive MBA
TRIUM EMBA TRIUM EMBA
PhD Program
Overview Overview
HEC Difference HEC Difference
Program details Program details
Research areas Research areas
HEC Community HEC Community
Placement Placement
Job Market Job Market
Admissions Admissions
Financing Financing
FAQ FAQ
Executive Education
Home Home
About us About us
Management topics Management topics
Open Programs Open Programs
Custom Programs Custom Programs
Events/News Events/News
Contacts Contacts
HEC Online
Overview Overview
Executive programs Executive programs
MOOCs MOOCs
Summer Programs Summer Programs
Youth programs Youth programs
Article

The Problem With Renewable Energy Incentives? Some of Them May not Incentivise Renewables…

Energy
Published on:

Sam Aflaki and Serguei Netessine’s new research uncovers a problem with renewable energy incentive policies, such as feed-in tariffs and carbon taxes. Renewables like wind and solar power often depend on carbon costly backups which stunt investment rewards.

renewable energy - Kwadri-AdobeStock

©Kwadri on Adobe Stock

Investment in renewable energy sources is incentivized in many regions across the globe. The majority of policies in place promote taxes on carbon emissions and minimum prices for renewable energies injected into the grid. However, these policies sometimes fail to take the intermittent nature of many renewable energy sources into account. “A backup supply may be needed for the times when renewable energy can’t be produced,” says Sam Aflaki. “This may very well come from carbon emitting generators.”

Renewable energy sources still tied to carbon costly backups

Carbon taxes and pricing mechanisms are enforced to make renewables more competitive against traditional, often more polluting methods of power generation. However, some renewable energy sources, such as wind and solar power, are inherently intermittent. In the night, no solar power can be generated, and on calm days, there is often very little wind. These energy sources are subject to random variation and less predictable supply.

To ensure energy is added to the grid continuously and to avoid costly power-cuts, energy suppliers need to make up for renewable intermittency. “Instant backup electricity is generated from technologies such as hydropower and legacy gas-fired plants that are on spinning reserve,” Aflaki explains. “These provide near immediate power when renewable energy is not being generated. However, some, such as the latter, emit greenhouse gasses and come with a carbon cost that has the potential to reduce the economic and environmental benefits of investing in renewables.”

Carbon costly backups cause incentives to fail 

Aflaki and Netessine set out to understand the extent to which using carbon costly backups can discourage investment in renewables. “Our model revealed that the intermittency of renewable technologies drives the effectiveness of carbon pricing mechanisms. This means that charging more for carbon emissions can mean renewables get a smaller share of investment when compared to modern and efficient fossil fuel sources,” states Aflaki. “This is facilitated by today’s liberalized energy market.

The market has been restructured over the last 20 years to foster competition and reduce retail prices, so now electricity is a commodity that can be traded in wholesale electricity markets.

 

In some cases, Aflaki and Netessine’s model shows that higher carbon taxes lead to a lower portion of renewables in the grid

 

These dynamics can contribute to the amplification of the aforementioned negative effect on investment in intermittent renewables.” In some cases, even, Aflaki and Netessine’s model shows that higher carbon taxes lead to a lower portion of renewables in the grid. “This is ok because higher carbon taxes always lead to lower emissions, but we do not necessarily see an increase in the share of energy generated by renewables,” Aflaki notes. “This is in contrast to one of the main goals of carbon taxation – to make renewables more competitive and available – so intermittency and the technology used as a backup need to be considered carefully by policy makers.”

Rethinking renewables to increase investment  

There are many ways to disentangle the links between carbon taxation and backup power generation that Aflaki considers viable. For example, you can use a renewable energy source as the backup power source, “Solar and wind energy are negatively correlated in many regions, so if you combine these, you can reduce the need for costly and emission intensive backup,” he states. There is also the option of storing energy in batteries, or in other forms of potential energy through a number of innovative technologies. 

 

Policy should makers adopt a holistic approach to renewables that takes intermittency into account and tailors the backup power options to individual energy supply scenarios.

 

Aflaki emphasizes that, for energy production to be sustainable, investment in renewables must increase. “To do so, we need to tackle the intermittency issue, along with other incentives,” he says. “We need to think of new and smarter ways - examples include better battery technology, pairing negatively correlated sources in a regional portfolio as well as other explorative measures such as storing electricity as potential energy - to address this aspect of renewables to ensure that they continue to supply an increasing portion of the grid with energy in the years to come.”
 

Methodology

Focus - Methodologie
To analyze the incentives for investing in the renewables energy sector, Aflaki and Netessine created a static, game theoretic model of the trade-offs associated with investing in intermittent renewable sources. With reference to existing electricity markets, they modelled the effect of carbon taxes and feed-in tariffs on the cost and share of wind capacity in an energy portfolio. They found that the intermittent nature of renewables impacts the effectiveness of carbon pricing mechanisms, making carbon emissions taxes a potential deterrent to investors.

Applications

Focus - Application pour les marques
“It is hoped that the paper can be used to influence policy makers and it is currently being used to brief some US senators. We want to make it clear that, in the case of intermittent renewable energy sources, it is important to take into account the real impacts of carbon taxes and other measures such as Feed-in-Tariffs, which are designed to encourage investment in renewables but don’t always have the intended effects. In order to make renewable technologies more competitive on a cost basis, we must have a more comprehensive notion of the cost of renewable. This should include the cost of intermittency or the cost of the backup and its associated effect on the environment.” Sam Aflaki suggests that policy makers adopt a holistic approach to renewables that takes intermittency into account and tailors the backup power options to individual energy supply scenarios.
Based on an interview with Sam Aflaki on his paper “Strategic Investment in Renewable Energy Sources: The Effect of Supply Intermittency,” coauthored with Serguei Netessine (Manufacturing and Service Operations Management, 2017).

Related content on Energy

photovoltaic panels on house roofs-thumbnail
Operations Management

How Can Communication Boost the Adoption of Renewable Energy?

By Andrea Masini, Sam Aflaki

Energy
Ukraine/Russia: The Energy Factor
Jean-Michel Gauthier HEC
Jean-Michel Gauthier
Energy & Finance Professor
pollution vignette
Energy

What’s the Best Way for Governments to Support Renewable Energy?

By Andrea Masini, Sam Aflaki

House on a hill with renewable energy - ALDECAstudio-vignette
Energy

Optimizing Feed-In Tariffs to Boost Renewable Energy Production

By Sam Aflaki, Andrea Masini