Ride-through of PMSG Wind Power System Under the Distorted and Unbalanced Grid Voltage Dips

Abstract

-This paper presents a ride-through skill of PMSG wind turbine system under the distorted and unbalanced grid voltage dips. When voltage dips occur in the grid, pitch control and generator speed control as well as a parallel resistor of DC-link help to keep the turbine's safety. Modern grid code requires a wind turbine to supply reactive currents to help voltage recovery after grid faults clearance. In order to supply reactive currents to the grid in case of the distortedly unbalanced grid voltage dips, a special PLL is needed to control the grid side converter and to regulate the grid voltages symmetrically. The proposed method is applied to 2MW multi-pole PMSG wind turbine system, and verified by simulation.

ÇRE-FKÇ Yönteminin Sabit Noktalı İşaret İşleyicilerle Giriş Gerilimi Dengesizliği Olan Sistemlerde Kullanımı için Adaptasyonu

“…Bu dengesizlik bileşenleri kullanılarak jeneratörlerdeki, trafolardaki, rüzgar enerji sistemlerinin şebeke bağlantılarındaki ve iletim hatlarındaki hatalar algılanmaktadır. [4][5][6][7] p V , …”

“…Bu tip adaptasyon için kapalı çevrim algılama yöntemleri kullanılarak değişken frekans ve genlik bilgisi elde edilir. En sık kullanılan frekans adaptasyon yöntemi, FKÇ (faz kilitlemeli çevrim) yöntemidir [1][2], [4][5][6][7]. Şebeke bağlantılı çeviricilerin, üretilmiş olan enerjiyi şebekeye aktarması sırasında gerilim algılaması için faz kilitlemeli çevrim kullanılmaktadır.…”

Design of DC Side Voltage and Compensation Analysis of THD for Shunt Power Quality Controller under System Load of Rectifier with R-L Load

“…As advanced equipment for improving the power quality, Shunt Power Quality Controller (SPQC) combines the functions of Shunt Active Power Filter (SAPF) [1,2] and Static Synchronous Compensator (STATCOM) [3,4]. The SPQC can be used to compensate both the reactive current and the harmonic current.…”

Application of a Simplified PLL Algorithm for Unbalanced Three Phase Systems by Using Low Cost Microcontrollers

“…In literature, solutions for synchronization with poor grid conditions have been vastly investigated and closed loop methods, such as double synchronous reference frame PLL, multiple reference frame PLL, synchronous reference frame PLL with positive sequence filter/detector, synchronous reference frame PLL with sinusoidal signal integrator etc. have been proposed by authors in [4][5][6][7][8][9][10][11][12][13]. In [14][15][16] authors have proposed open loop methods such as weighted least square estimation, low pass filtering transformation angle detector, normalized positive sequence synchronous frame etc.…”