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Sensitivity and transient stability 9

analysis of fixed speed wind

generator with series dynamic

braking resistor

Mohammad Hasanuzzaman Shawon*, Ahmed Al-Durra**, S.M. Muyeen †
*AGH University of Science & Technology, Krakow, Poland; **Khalifa University of Science
†
and Technology, Abu Dhabi, UAE; Curtin University, Perth, WA, Australia

1 Introduction

Statistics of Global Wind Energy Council show that the cumulative global capacity of
wind energy has reached a total of 486.8 GW capacity in 2016, an increase of nearly
200,000 MW in the past five years. So wind energy has become a mature and booming
global business and expected to reach to cumulative installed capacity of over 800
GW by the end of 2021 [1]. Among different technologies available for wind power
generation, fixed speed wind turbine (FSWT)-driven induction generator (IG) is quite
popular due to its simple, rugged, maintenance-free construction and low cost [2]. It
is noted that the lifetime of wind turbine (WT) is expected to be close to two decades.
Therefore, the interaction of FSWT generator system (WTGS) with power system is
still a matter of interest to be investigated, even if the variable speed wind generator
is becoming popular. This chapter presents a comprehensive study on small signal
stability of the FSWT-driven IG connected to a power grid including an additional
compensating device, which can even augment the fault ride through capability of
wind generator.
The small signal stability analysis of wind power generation is getting remarkably
important recently. Small signal stability analysis of the power system including the
widely used synchronous machines is a well-developed field of study [3–5]. The effect
of wind energy conversion system on small signal stability model along with con-
ventional power system equipped with synchronous generator equipped with power
system stabilizer (PSS) is presented in [6]. The small signal dynamic models for both
fixed and variable speed wind turbine generator systems are available in power system
literatures [7–9].
Because of the high wind power penetration level to the power grid, it is important
to observe the characteristics of the wind generator under voltage dip and grid fault
conditions. Many methods have been developed and reported in the literature using
SVC, STATCOM, superconducting magnetic energy storage (SMES) system, fly-
wheel, and so on [10–14] to improve stability. A small series dynamic braking resistor

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