04-05-2016, 09:38 AM
Abstract
The rapid growth of wind power systems worldwide will likely see the integration of large wind farms with electrical networks that are series compensated for ensuring stable transmission of bulk power. This may potentially lead to sub synchronous resonance (SSR) issues. Although SSR is a well-understood phenomenon that can be mitigated with flexible ac transmission system (FACTS) devices, scant information is available on the SSR problem in a series-compensated wind farm. This paper reports the potential occurrence and mitigation of SSR caused by an induction-generator (IG) effect as well as torsional interactions, in a series-compensated wind farm. In this study, a wind farm employing a self-excited induction generator is connected to the grid through a series-compensated line. The DFIG converters will be explored for SSR mitigation. The major contributions of the paper are 1) investigation of the potential of wind farm converters for SSR mitigation and 2) identification of an effective control signal for mitigating SSR using fuzzy logic controllers to simultaneously enhance both sub synchronous and super synchronous resonance modes .Extensive simulations have been carried out using Matlab/Simulink
Introduction
Subsynchronous resonance (SSR) phenomenon in wind farms connected with series compensated transmission network has been researched in recent literature. Mitigating SSR using FACTS devices such as TCSC, SVC, and STATCOM has also been explored in the literature. The ability of the power converters in doubly-fed induction generator (DFIG) wind farms in mitigating SSR has rarely been investigated. In this paper, the DFIG converters will be explored for SSR mitigation. The investigation in this paper includes the design of auxiliary SSR damping controller and selection of control signals. Residue-based analysis, root locus diagrams, and time-domain simulation in Matlab/Simulink will be carried out. The major contributions of the paper are 1) investigation of the potential of wind farm converters for SSR mitigation and 2) identification of an effective control signal for SSR damping controller to simultaneously enhance both subsynchronous and supersynchronous resonance modes.
The rapid growth of wind power systems worldwide will likely see the integration of large wind farms with electrical networks that are series compensated for ensuring stable transmission of bulk power. This may potentially lead to sub synchronous resonance (SSR) issues. Although SSR is a well-understood phenomenon that can be mitigated with flexible ac transmission system (FACTS) devices, scant information is available on the SSR problem in a series-compensated wind farm. This paper reports the potential occurrence and mitigation of SSR caused by an induction-generator (IG) effect as well as torsional interactions, in a series-compensated wind farm. In this study, a wind farm employing a self-excited induction generator is connected to the grid through a series-compensated line. The DFIG converters will be explored for SSR mitigation. The major contributions of the paper are 1) investigation of the potential of wind farm converters for SSR mitigation and 2) identification of an effective control signal for mitigating SSR using fuzzy logic controllers to simultaneously enhance both sub synchronous and super synchronous resonance modes .Extensive simulations have been carried out using Matlab/Simulink
Introduction
Subsynchronous resonance (SSR) phenomenon in wind farms connected with series compensated transmission network has been researched in recent literature. Mitigating SSR using FACTS devices such as TCSC, SVC, and STATCOM has also been explored in the literature. The ability of the power converters in doubly-fed induction generator (DFIG) wind farms in mitigating SSR has rarely been investigated. In this paper, the DFIG converters will be explored for SSR mitigation. The investigation in this paper includes the design of auxiliary SSR damping controller and selection of control signals. Residue-based analysis, root locus diagrams, and time-domain simulation in Matlab/Simulink will be carried out. The major contributions of the paper are 1) investigation of the potential of wind farm converters for SSR mitigation and 2) identification of an effective control signal for SSR damping controller to simultaneously enhance both subsynchronous and supersynchronous resonance modes.