A grid planning process strengthens Hawai‘i’s lead in developing a renewable energy grid
The Hawaiian Electric Companies have a plan. Their resource plan, filed in December 2016, outlines the near-term actions for attaining 100 percent renewable generation in their service area by the state’s mandated goal of 2045; the most ambitious—and only—such plan in the country.
In July 2017, the Hawai‘i Public Utilities Commission (HPUC) formally accepted this December-filed resource plan—their Power Supply Improvement Plan (PSIP), which was updated from a previous PSIP filed in April 2016.
Broad, inclusive participation. Both PSIPs were created in an open, collaborative process that included multiple participants and intervenors admitted into the docket. These participants were directed to “propose questions and suggest alternative modeling inputs, assumptions, methods, and analytical approaches” that Company planners must consider to incorporate into the resource planning process.
Selecting generation resources. Company planners ran production simulations using optimized candidate resource plans that incorporated distributed energy resources (DER), demand response programs, and other resources; then analyzed system security requirements to ensure system reliability. From the final results, they developed near-term (2017–2021) action plans that encompass renewable acquisitions, grid modernization, DER policies, environmental compliance, and system security improvements.
In the aggregate, these action plans add enough rooftop and feed-in tariff solar generation combined with large-scale solar and wind to attain a 52% RPS by 2021.