Abstract
The present report deals with economic issues of selecting means ensuring the capacity adequacy of electric power systems. Cost analysis of various engineering measures ensuring the capacity adequacy has been performed, they are as follows: construction of margin generating capacities, erection of new power transmission lines or increase of transmission capacity of existing power lines. The cost-based analysis has been conducted following investment programs and regulatory acts in place. Recommendations on developing computational models of power systems have been given based on the results obtained in order to assess the capacity adequacy indices with account made for the cost of various engineering measures to be taken for their improvement.
Highlights
The capacity adequacy (CA) studies represent as traditional as ever a highly topical problem in terms of planning the electric power system (EPS) development to which an interest is expressed by scientific community or organizations operating in the industry and being in charge for EPS operation and development, but by consumers of electricity and capacity markets as a whole
In this context, when forming multi-zone transport models of EPS it is useful to take into account the distance between EPS nodes, but their potential need of margin capacity which may be estimated as being that one for concentrated power system [15]. As far as it concerns remote nodes in case of their small need in margin capacity, it should be reasonable to separate them as specific reliability areas because the increase of power grid transmission capacity towards these nodes may become more expensive as compared to the installation of additional generating facilities therein
Based on performed calculations the following recommendations may be proposed to form EPS transport models in order to estimate capacity adequacy indices (CAI) with account made for the cost of engineering measures ensuring CA: 1. When forming EPS transport models and performing further CAI calculations, one should take into account the transmission capacity of overhead electric lines (OHL) with power factor correction units (PFCU) use allowing increasing the transmission capacity of power grid and adjusting the load of some its components, as the cost of PFCU is by an order of magnitude lower than that one of new generating facility or new OHL
Summary
The capacity adequacy (CA) studies represent as traditional as ever a highly topical problem in terms of planning the electric power system (EPS) development to which an interest is expressed by scientific community or organizations operating in the industry and being in charge for EPS operation and development, but by consumers of electricity and capacity markets as a whole. Some issues related to the evaluation of power grid CAI do not have a unique solution and in view of this present an area of special scientific interest These issues include the simulation of transmission line and accounting for capacity transmission constraints when evaluating CAI of meshed systems with weak tie lines. Common issues of EPS simulation have been studied to evaluate CAI and to optimize the capacity margin, a feasibility study of taking into account various power transmission constraints has been carried out on the basis of comparing the cost of margin capacity and that one of various engineering solutions aimed at ensuring the transmission capacity increase in power grid
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