VGB Power Tech 03/2010
UN MECANISM PENTRU PIATA DE ENERGIE ELECTRICA BAZAT PE TARIFE DE TRANSPORT ECHILIBRATE CU BENEFICIILE
Jean Constantinescu
Rezumat - Articolul isi propune sa arate ca atit mecanismul pietei de energie electrica cit si tarifarea transportului pot fi imbunatatite daca se foloseste un model nodal iar oportunitatile de piata sunt recunoscute ca serviciu de transport. Metoda Oportunitatii de Piata (MOF in engl.) introduce o componenta complementara platilor pentru compensarea pierderilor si a congestiilor de retea, proportionala cu beneficial pe care-l obtine utilizatorul retelei din accesul deplin la retea. Aceasta sarcina complementara respecta in esenta principiile pietei. Tarifele de transport propuse ramin bazate pe costuri iar aparenta lor lipsa de predictibilitate nu conduce la riscuri inacceptabile pentru utilizator. In plus, tarifele se conformeaza riguros cu cerinta de venit (reglementata), care asigura un venit predictibil pentru OTS. Metoda mai introduce un mecanism nou al pietei de energie electrica, in care ofertele de pret sunt agregate cu componentele tarifelor (nodale) de transport pentru compensarea pierderilor si a congestiilor. Acest mecanism nou de piata asigura cu usurinta alocarea si plata componentelor ex-post, de oportunitate, ale tarifelor.
Cuvinte cheie - energie electrica, transport, tarife, taxa de oportunitate, cost marginal, mecanism de piata, acces la retea.
AN ELECTRICITY MARKET MECHANISM BASED ON BENEFIT-BALANCED TRANSMISSION RATES
Jean Constantinescu
Abstract - The paper attempts to show that both electricity market mechanisms and transmission pricing would be improved if a nodal model is used and market opportunities were recognized as a transmission service. The Market Opportunity Fee (MOF) method sets out a complement to loss compensation and congestion compensation fees, as a proportion of the benefit the grid user gets from full network access. This complementary charge is basically compliant with market principles. The proposed transmission rates do remain cost - based while their apparent lack of predictability would not result in unacceptable risks for the user. Additionally, the rates strictly confirm with (regulated) revenue requirement thus giving a predictable income for the TSO. The method introduces a new electricity market mechanism in which price-offers are aggregated with the loss and congestion components of (nodal) transmission rates. This new market mechanism would easily ensure allocation and payment of ex-post opportunity fees.
Keywords - Electricity, transmission, rate, opportunity fee, marginal cost, market mechanism, network access.