Pepco Holdings supports federal and state regulatory policies that allow timely, efficient and cost-effective integration of renewable generation. To facilitate the interconnection process, we make it a priority to partner with developers, state governments and PJM (our Independent System Operator). Our system is robust and capable of integrating renewable resources in most portions of our service area. Safety, reliability and operability of the system are significant considerations when we develop integration plans.
Renewable generators, depending on their size and location, can present interconnection challenges. Also complicating the situation is the way the electric system has been designed over the past 100-plus years: to deliver power one way from central generating sources to customers. Now, the electric system is expected to carry electricity in both directions. Power flow can change direction at certain times of the day, depending on whether the customer's home generator is exporting excess electricity back into the utility grid, or the utility is delivering electricity to the customer.
Also, the power generated by renewables is intermittent, because the sun is not always shining and the wind is not always blowing. As a result, renewables cannot be relied upon to provide a consistent source of electricity. With the growing dependence on electronic devices and expectations for power reliability, this is a challenge. In response, Pepco Holdings has been working to find ways to integrate alternative energy sources in a deliberate, thoughtful and seamless manner, including:
In addition to analyzing applications to install local generation, Pepco Holdings' engineering groups are involved in many forward-thinking efforts, such as:
Pepco Holdings will continue to monitor industry progress in developing renewable integration tools and will implement appropriate measures to maintain and improve the reliability and efficiency of renewable interconnections. As the supply of renewable energy increases, Pepco Holdings' utilities will continue to enhance their infrastructure to support these changes to their distribution systems.