November 07, 2011

Accenture Study Finds Growth in Customer Solar Power Installations Poses Significant Challenges for the Electric Grid

NEW YORK, Nov. 7, 2011 – The increased penetration of solar energy installations by residential and commercial property owners and large-scale solar energy developers could undermine the reliability, safety and quality of power supply on the electric grid for utilities that do not plan for it, according to a new Accenture (NYSE: ACN) study.

The study, based on a survey of 50 executives with 31 North American utility providers, found that 38 percent of respondents believe their electric grids will require an upgrade or face operational challenges with a solar photovoltaic (PV) penetration level of less than 15 percent. An additional 34 percent said their utility will face similar issues with a solar PV penetration of between 15 and 24 percent.

Distributed generation by residential and commercial property PV systems (51 percent of all installations) and developer-owned systems (15%) are already causing problems for a significant number of utilities. These include high costs to provide reactive power/voltage support (cited by 36 percent of the respondents), additional interconnection requirements (30 percent), and grid instability caused by anti-islanding requirements (18 percent).

Additional findings of the survey include:

“Solar power has great potential as a source of renewable energy as developers continue to innovate and reduce the cost of PV production,” said David M. Rouls, managing director, Accenture Smart Grid Services. “However, the large-scale penetration of solar PVs will require Smart Grid planning and changes by utilities to realize its benefits.”

Accenture recommends that utilities take a number of actions to manage the impact of solar PV, take advantage of its growth and successfully integrate higher levels of solar PV production into their operations:

1) Proactively facilitate solar PV deployment and new ownership models by providing infrastructure, system and processes ; review existing roadmaps and/or develop a comprehensive roadmap for utility T&D infrastructure upgrades and smart grid implementation with a clear focus on the impacts of increased penetration of solar PV;
2) Accelerate smart grid initiatives in transmission and distribution to sustain high penetration solar in the grid;
3) Review the impacts and risks on the utility business processes and redesign the processes as needed for efficient integration and facilitation of solar PV in the utility system.

About the study

The “Achieving High Performance with Solar Photovoltaic Integration” study is based on a survey conducted by IDC Energy Insights of North American-based utilities that are either already seeing the impact of increased renewable energy additions or are planning to increase their exposure to renewables. The quantitative survey was conducted online between March and June 2011 with 50 respondents from 31 utilities. In addition, 12 in-depth interviews were conducted. Investor-owned utilities (IOUs) made up 72 percent of the utilities in the sample, with the remainder consisting of cooperative utilities, authorities and municipal utilities.

About Accenture

Accenture is a global management consulting, technology services and outsourcing company, with approximately 236,000 people serving clients in more than 120 countries. Combining unparalleled experience, comprehensive capabilities across all industries and business functions, and extensive research on the world’s most successful companies, Accenture collaborates with clients to help them become high-performance businesses and governments. The company generated net revenues of US$25.5 billion for the fiscal year ended Aug. 31, 2011. Its home page is

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