Q5Restructured Power System

The wholesale competition model is one of several recognized models of electricity industry restructuring, representing an intermediate stage of competition introduction: it opens the generation segment fully to competition (multiple independent generators compete to sell electricity), while retail supply to final consumers (particularly small residential and commercial consumers) remains the responsibility of a regulated distribution/supply company, which itself procures its power requirements competitively from the wholesale market rather than owning all its own generation.

Key features of the wholesale competition model:

Generation competition: independent Generation Companies (GENCOs) compete to sell electricity into the wholesale market, either through bilateral long-term/short-term contracts directly with distribution companies and large industrial consumers, or through an organized power exchange (spot market) providing transparent price discovery and a liquid trading platform for standardized electricity products.

Regulated retail supply: unlike the full retail competition model (where even small residential consumers can choose among multiple competing retail suppliers), the wholesale competition model retains a single, regulated distribution/supply company as the exclusive retail supplier within its service territory for smaller consumers, who continue to pay a regulated retail tariff set by the regulatory commission, even though the underlying wholesale power the distribution company procures is bought competitively.

Open access for large consumers: in many practical implementations of this model (including India's electricity market structure), sufficiently large industrial or commercial consumers may be granted 'open access' rights, allowing them to bypass their local distribution company and directly purchase power from the wholesale market or through bilateral contracts with generators, effectively extending wholesale competition benefits to this class of larger consumers even while smaller consumers remain served through the regulated distribution company.

System operator role: as in other restructured market models, an Independent System Operator continues to manage the physical dispatch, transmission access, and system security functions independently of the competing generators and the regulated distribution company, ensuring the introduction of generation competition does not compromise the technical operation and reliability of the shared transmission network.

Position within the restructuring spectrum: the wholesale competition model represents a middle ground between (a) the fully regulated, vertically-integrated monopoly model (no competition anywhere in the value chain) and (b) the full retail competition model (where even small residential consumers can freely choose among multiple competing retail electricity suppliers, as implemented in some deregulated US states and European countries); it captures much of the generation-side efficiency benefit of competition while avoiding the greater administrative complexity, consumer-protection challenges, and metering/billing infrastructure requirements associated with extending full competitive choice down to the level of individual small residential consumers — making it a commonly adopted, pragmatic restructuring model, including largely reflecting the current structure of India's electricity market, where generation is substantially competitive but retail supply to most consumers remains through regulated distribution licensees, albeit with growing provisions for open access by larger consumers.

Advantages of the wholesale competition model: it captures the bulk of the efficiency gains from competition (lower generation costs through inter-generator competition, better utilization of diverse generation resources, and improved investment signals for new capacity) without requiring the extensive retail-market infrastructure (competitive retail licensing, consumer switching mechanisms, universal smart metering) needed to support full retail choice for every small consumer; it also allows the distribution company to retain a stable, predictable revenue and service relationship with small consumers, which can be operationally and socially advantageous, particularly in developing-country contexts with large numbers of low-consumption residential and agricultural consumers for whom full retail competition may offer limited practical benefit relative to its administrative cost and complexity.