Fault behavior of wind farms with fixed-speed and Doubly-Fed Induction Generators

2011 ◽  
Author(s):  
F. Sulla ◽  
J. Svensson ◽  
O. Samuelsson
Keyword(s):  
Wind Farms ◽  
Induction Generators ◽  
Fault Behavior ◽  
Doubly Fed Induction Generators ◽  
Doubly Fed

scholarly journals Simulation of Electric Faults in Doubly-Fed Induction Generators Employing Advanced Mathematical Modelling

2017 ◽  
Author(s):  
Sebastian Martens ◽  
Nenad Mijatovic ◽  
Joachim Holbøll ◽  
Georgis A. Skrimpas ◽  
Christian W. Sweeney
Keyword(s):  
Discrete Models ◽  
Electrical Machine ◽  
Stator Current ◽  
Induction Generators ◽  
Fault Behavior ◽  
Doubly Fed Induction Generators ◽  
Phase Coordinates ◽  
Short Circuits ◽  
Doubly Fed ◽  
Machine Analysis

<p>Efficient fault detection in generators often require prior knowledge of fault behavior, which can be obtained from theoretical analysis, often carried out by using discrete models of a given generator. Mathematical models are commonly represented in the DQ0 reference frame, which is convenient in many areas of electrical machine analysis. However, for fault investigations, the phase-coordinate representation has been found more suitable. This paper presents a mathematical model in phase coordinates of the DFIG with two parallel windings per rotor phase. The model has been implemented in Matlab and its properties in context of fault simulations and investigations has been investigated. Some of the most common faults have been simulated, namely broken rotor bars or windings, dynamic eccentricities and stator phase winding short circuits. These fault conditions propagate to the stator current as undesired spectral components, which can be detected by applying frequency spectrum analysis.</p>

scholarly journals A Comparison Study of Reactive Power Control Strategies in Wind Farms with SVC and STATCOM

2018 ◽  
Vol 8 (6) ◽  
pp. 4836 ◽  
Author(s):  
Nazha Cherkaoui ◽  
Touria Haidi ◽  
Abdelaziz Belfqih ◽  
Faissal El Mariami ◽  
Jamal Boukherouaa
Keyword(s):  
Power Control ◽  
Power Plants ◽  
Reactive Power ◽  
Control Strategies ◽  
Wind Farms ◽  
Reactive Power Control ◽  
Induction Generators ◽  
Wind Power Plants ◽  
Doubly Fed Induction Generators ◽  
Doubly Fed

<p>In the recent years, the integration of the wind farms into the electrical grids has increased rapidly. Especially, the wind power plants made up with doubly fed induction generators due to its many advatanges, such as being able to control its reactive power. Hence, some countries have published grid code requirements related to the reactive power that the wind turbines have to satisfy. This paper presents a coordinated reactive power control strategy in which STATCOM and doubly fed induction generators in wind power plants are used in order to bring back the voltage at the point of common coupling in the allowable range. First, reactive power requirements that the wind farms have to fulfill in some European countries are introduced. Second, the reactive power limitations of 2MW doubly fed induction generator are determined. Then, the static synchronous compensator (STATCOM) and the synchronous var compensator (SVC) FACTS (Flexible AC Transmission Systems) devices are presented. Finaly, various reactive power control strategies are applied to 10 MW wind farm, and the simulation results are analysed and compared.</p>

Research on Control Strategy for Reactive Power and Voltage of Wind Farms with Doubly-Fed Induction Generators

2014 ◽  
Vol 953-954 ◽  
pp. 361-364
Author(s):  
Si Qing Sheng ◽  
An Chen
Keyword(s):  
Control Strategy ◽  
Wind Farm ◽  
Reactive Power ◽  
Wind Farms ◽  
Induction Generators ◽  
Doubly Fed Induction Generators ◽  
Voltage Quality ◽  
Power Regulation ◽  
Stability Issue ◽  
Doubly Fed

To solve the voltage stability issue caused by wind speed random and fluctuations and dynamic reactive power regulation of DFIG, a new coordinated control strategy is proposed. The scheme of switching of capacitor bank is pre-performed based on the predicted wind power, then based on the variety relation analysis between active power and reactive power of DFIG, by regulating the reactive power of wind farm in real time and determining reactive power output, it implement the reactive power and voltage control. Therefore, this improvement can enhance voltage quality and reduce capacitor responding times. The simulation of a practical example shows that the control strategy is effective and feasible.

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