[BETA] Fortnightly

As the industry resumes major capital-spending programs, utilities and their stakeholders are rightly concerned about the effects on prices. Traditional regulatory approaches expose utilities to risks and costs, and can bring rate shock when capital spending finally makes its way into customers’ bills. Pre-funding investments can provide a smoother on-ramp to bearing the costs of a 21st-Century utility system — but it also raises questions for utilities to address.

In competitive power markets based on locational marginal pricing (LMP), the facts sometimes conflict with popular belief. Most notably: 1. When there’s congestion, the books don’t balance, and ratepayers always pay more than the generators receive. The difference is sometimes called “congestion cost.” 2. Congestion in a competitive market doesn’t necessarily increase ratepayers’ costs; and 3. Reductions in LMP are incomplete and sometimes misleading measures of economic benefits of transmission upgrades. These three facts and their implications should be considered in transmission planning, market design, tariffs, and system operations.