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.

The PJM Interconnect’s Reliability Pricing Model generally has succeeded in attracting and retaining low-cost generation and demand resources to maintain resource adequacy. But sluggish demand and low prices have weakened the market for long-term capacity contracts. Suppliers aren’t willing to lock in current low prices, and buyers don’t want to pay more for future certainty. Is the market dysfunctional, as some state lawmakers suggest, or does the lack of long-term contracts indicate a rational balance of supply and demand?

Dodging capacity payments might become an art form among load-serving entities and large electric consumers, as evidenced by Duquesne’s plan to exit PJM, as well as alternative market-designs proposed by large users. But such behaviors might only serve to disrupt organized markets and cause a return to full regulation.

Some advocates claim markets can help reduce electricity prices by changing the design of wholesale auctions. However, taking a pay-as-bid approach could make matters worse.

The ability to provide reliable capacity is becoming both riskier and more costly to society and investors alike.

Business & Money

A review of the ongoing evolution of market design.

LICAP, ICAP, UCAP, NoCAP. Some markets have them, some don't. Where they do exist, no two are equal.

Power Measurement

Energy trading returns, healthier and wiser.

The recent announcement of a trading joint venture between TXU and Credit Suisse First Boston (CSFB) is the latest in a series of positive news items supporting the return of energy trading. Wall Street firms continue to expand into the energy-trading sector, with Citigroup as well as CSFB moving into an area already well represented by the likes of Morgan Stanley, Goldman Sachs, and UBS.