On the use of wind energy conversion systems for mitigating subsynchronous resonance and subsynchronous interaction

Abstract

The paper highlights the potential use of wind energy conversion systems for the mitigation of Subsynchronous Resonance (SSR) and Subsynchronous Interaction (SSI). SSR and SSI damping is attained by introducing supplemental control signals in the reactive power control loops of the grid side converters of Full-Frequency Converter (FFC) and Doubly-Fed Induction Generator (DFIG) wind turbines. The effectiveness of the supplemental control in mitigating the two phenomena is demonstrated on a test benchmark through time domain simulation studies using EMTP-RV. IndexTerms -Series capacitive compensation, subsynchronous interaction, subsynchronous resonance, wind energy.

Sub‐synchronous oscillations in wind farms – an overview study of mechanisms and damping methods

“…The function of these two methods is to introduce additional damping into the system. The required damping can be obtained either using SSR damping controller (SSRDC) [35–38, 42–46, 72] or virtual impedance [39]. The typical configuration of a SSRDC is shown in Fig.…”

“…Therefore, in most cases, the GSC of WTGs is modified to integrate additional SSO damping signals. The auxiliary SSO damping signal can be generated either using an SSRDC [35–38] or using the virtual impedance control method [40].…”

“…8. The auxiliary SSO damping generated by SSRDCs is introduced into the reactive power control loop of the GSC in [36, 37] and both the reactive power and DC‐link voltage control loops [35]. The most appropriate point to introduce the SSO damping term has been investigated in [38, 74].…”

“…Moreover, one of the most important topics in the engineering perspective is mitigation methods. SSR mitigation by the optimal parameter design [33, 34] using power converters in WTGs [35–40] and flexible alternating current transmission system (FACTS) controllers [38, 41–48] has been proposed as summarised in Table 1. Each mitigation method has its advantages and disadvantages, and challenges as comprehensively discussed in [49].…”