Technical Presentations

Subsynchronous Control Interactions (SSCI) Studies using EMTP863

Abstract
This work presents a brief introduction to SSCIs, followed by parametric studies involving three PLL models. Additional key findings during SSCI screening studies performed by IEEE working group J18 w... see moreill be also presented.

Tag(s): parametric studies, PLL model, sub-synchronous oscillation, frequency scan

Screening Studies for Susceptibility to Sub Synchronous Control Interaction using EMTP848

Abstract
Sub Synchronous Control Interaction (SSCI) is can occur between type 3 wind turbines and a series capacitor. SSCI events can result in severe overvoltages that can damage equipment on the transmission... see more system. This presentation will provide a brief history of SSCI, its impacts on the power system, and how to perform screening studies for SSCI susceptibility using EMTP… The presentation will also include a discussion of challenges encountered, and key results observed, during screening studies performed by IEEE working group J18 for an example power system. Areas of future study will also be highlighted.

Tag(s): SSCI, Wind park, Type 3, time domain scan, subsynchronous-control interaction

Safe Operation of DFIG based Wind Parks in Series Compensated Systems762

Abstract
<p>This presentation will demonstrate the impact of WP operating conditions and DFIG control system parameters on SSCI.</p><p>
Overview: - SSCI Phenomeno... see moren in Series compensated DFIG-based wind Parks - SSCI Problem Identification - Impact of DFIG control system parameters on SSCI - SSCI Mitigation - Future Research
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SSCI analysis: Assessment of Interactions Involving Wind Farm Systems755

Abstract
<p>This presentation provides an overview of recently proposed generic EMTP wind turbine models, which have been validated against field measurements, and a benchmark study system for th... see moree assessment of low-frequency interactions involving wind farms in radial series-compensated grids. Based on these models, detailed EMTP results are presented and modal analysis is applied to help explaining some of the identified issues and provide mitigation. Finally, a recently proposed Abstract : Recently, field events involving adverse interaction between grid-connected inverters and the existing power infrastructure have been reported. Hence, the ever increasing integration of such devices is yielding the need for detailed EMT-Type models to better understand such phenomena, as well as reliable screening methodologies for the efficient identification of potentially critical scenarios during new interconnection processes. This work provides an overview of recently proposed generic EMTP wind turbine models, which have been validated against field measurements, and a benchmark study system for the assessment of low-frequency interactions (sub-synchronous control interaction) involving wind farms in radial series-compensated grids. Based on these models, detailed EMTP results are presented and modal analysis is applied to help explaining some of the identified issues and provide mitigation. Finally, a recently proposed methodology aiming at the efficient identification of critical scenarios, namely, the DQ-Scanning technique, is outlined and its effectiveness demonstrated by its application to the aforementioned systems. Author: Aramis Schwanka Trevisan</p>

Safe Operation of DFIG based Wind Parks in Series Compensated Systems740

Abstract
<h6 class="text-black" style="padding-bottom: 30px; padding-top: 30px; text-align: justify;">Speaker: <strong>Ulas Karaagac</stro... see moreng>, <em>Hong Kong Polytechnic University</em></h6> <p class="text-black">Subsynchronous control interaction (SSCI) is the interaction between the power electronics control and the series compensated transmission system that occurs at frequencies below the system nominal frequency. SSCI may occur between the doubly-fed induction generator (DFIG) control system and the series compensated transmission line, to which the wind park (WP) is connected. Not only the DFIG control system parameters, but also the WP operating conditions have significant impact on SSCI.<br><br>This presentation will demonstrate the impact of WP operating conditions and DFIG control system parameters on SSCI. Guidelines will be also presented for modifying the DFIG control system parameters to ensure safe operation and acceptable transient responses due to faults. In addition, the accuracies of various analytical tools used for SSCI problem identification will be discussed.</p>