Latvian electrical power system stability's analysis taking into account new development strategy until 2025

Abstract

Energy is one of the sectors directly affecting the economic growth and forming a significant part of overall expenses in several industry branches, especially in manufacturing. The development of the energy sector requires significant investments which can only be attracted in a stable and predictable investment environment. Therefore, Latvian energy sector is being planned in a long-term both globally and at the European Union (EU) level. During the last two decades, increase in electricity demand and environmental concern resulted in fast growth of power production from renewable sources, where wind energy is one of the most efficient alternatives. The second important moment is the Baltic power system's development strategy, with the breakdown of continental Europe from the energy circle of BRELL until 2025. The purpose of this paper is devoted to the evaluation sufficiency of the taken measures, taking into account the integration of a large wind farm in the Latvian Electric Power System (EPS) in terms of stability. The methodology proposed in the paper can be applied for the detection of network parameters that are most vulnerable to perturbations such as a voltage drop, as well as defining the relations of said parameters with the EPS parameters, and using this information for the consequent improvement of behavioral EPS properties in general. Thus, knowing the location of sensors, it is possible to determine and control the nodes that undergo the biggest fluctuations of operational parameters during the disturbances.