Abstract
The stability and security of small and isolated power systems can be compromised when large amounts of wind power enter them. Wind power integration depends on such factors as power generation capacity, conventional generation technology or grid topology. Another issue that can be considered is critical clearing time (CCT). In this paper, wind power and CCT are studied in a small isolated power system. Two types of wind turbines are considered: a squirrel cage induction generator (SCIG) and a full converter. Moreover, the full converter wind turbine’s inertia emulation capability is considered, and its impact on CCT is discussed. Voltage is taken into account because of its importance in power systems of this kind. The study focuses on the small, isolated Lanzarote-Fuerteventura power system, which is expected to be in operation by 2020.
Highlights
The unprecedented worldwide development of wind power over recent decades reached around 318,644 GW by the end of 2014, and it is estimated that global wind power capacity will continue to increase [1].Integrating wind power into power systems is an increasingly common challenge
Large amounts of wind power can be introduced into continental power systems, such as the European grid managed by the members of the European Network of Transmission System Operators for Electricity (ENTSO-E)
critical clearing time (CCT) can be seen as a measure of the transient stability of a power system [3,4] and can be defined as the maximum allowed duration of a three-phase short circuit before loss of system stability
Summary
The unprecedented worldwide development of wind power over recent decades reached around 318,644 GW by the end of 2014, and it is estimated that global wind power capacity will continue to increase [1]. We use the trial and error method and the above-mentioned criteria to study how using inertia emulation could impact CCT values and eventually the wind power penetration level. Other papers have analyzed inertia emulation from wind turbines and have shown a positive impact of the inertia emulation on the frequency response [12,13,14,15,16,17,18,19,20] These papers usually look at large power systems and conventional generation based on large thermal or hydro generator units. The relationship between wind power and CCT is studied in a small, isolated power system with two types of wind turbines: the squirrel cage induction generator (SCIG) and the full converter. Modeling and analysis are performed using PSS E v32 software (Siemens-PTI, Schenectady, NY, USA)
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