دانلود رایگان مقاله انگلیسی, طراحی کنترلر میراساز SSR و جاگذاری بهینه در سمت روتور و در مبدل های جبران ساز سری DFIG سمت شبکه مزرعه بادی

SSR Damping Controller Design and Optimal Placement in Rotor Side and Grid Side Converters of Series Compensated DFIG-Based Wind Farm

سال انتشار : 2015

نوع مقاله : IEEE JOURNAL & MAGAZINES

تعداد صفحات : 12

Abstract—This paper deals with subsynchronous resonance

(SSR) phenomena in a capacitive series-compensated DFIG-based

wind farm. Using both modal analysis and time-domain simulation,

it is shown that the DFIG wind farm is potentially unstable

due to the SSR mode. In order to damp the SSR, the rotor-side

converter (RSC) and grid-side converter (GSC) controllers of the

DFIG are utilized. The objective is to design a simple proportional

SSR damping controller (SSRDC) by properly choosing an optimum

input control signal (ICS) to the SSRDC block, so that the

SSR mode becomes stable without decreasing or destabilizing the

other system modes. Moreover, an optimum point within the RSC

and GSC controllers to insert the SSRDC is identified. Three different

signals are tested as potential ICSs including rotor speed,

line real power, and voltage across the series capacitor, and an optimum

ICS is identified using residue-based analysis and root-locus

method. Moreover, two methods are discussed in order to estimate

the optimum ICS, without measuring it directly. The studied

power system is a 100 MW DFIG-based wind farm connected

to a series-compensated line whose parameters are taken from

the IEEE first benchmark model (FBM) for computer simulation

of the SSR. MATLAB/Simulink is used as a tool for modeling

and designing the SSRDC, and power system computer aided

design/electromagnetic transients including dc (PSCAD/EMTDC)

is used to perform time-domain simulation for design process

validation.

Index Terms—Doubly

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