engleski

Importance of reliability criterion in power system expansion planning

The self-sufficiency of Power System has not been a relevant issue at the electricity market any more, since day-to-day optimization and security of supply are realized at the regional or internal electricity market. Research connected to security of supply, i.e. having reliable power capacities to meet demand, has been conducted by transmission system operators. Some of the common parameters of security of supply are Loss of Load Probability (LOLP) and/or Loss of Load Expectation (LOLE), which are calculated by a special algorithm. These parameters are specific for each power system. The work presents the way of calculating LOLP as well as optimization algorithm of LOLP, which takes into consideration the particularities of the power system. It also presents a difference in the treatment of LOLP regarding the observed power system and necessary installed power capacity, if applied to the calculated LOLP in relation to optimized LOLP. As a conclusion, it has been analysed what it means at the regional electricity market, where the participants are countries with different development level and with various particularities of power system, i.e. what it means when the same LOLP criterion is applied to them as well as optimized LOLP.

security of supply ; LOLP optimization ; VOLL, generation expansion planning ; reliability

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