Operation Characteristics of Zone 3 Distance Protection in Wind Power Systems with Fixed-Speed Induction Generators

ENERGYO ◽  
2018 ◽  
Author(s):  
Shenghu Li
Keyword(s):  
Power Systems ◽  
Wind Power ◽  
Distance Protection ◽  
Induction Generators ◽  
Wind Power Systems ◽  
Operation Characteristics

Operation Characteristics of Zone 3 Distance Protection in Wind Power Systems with Fixed-Speed Induction Generators

2011 ◽  
Vol 12 (4) ◽  
Author(s):  
Shenghu Li
Keyword(s):  
Power Systems ◽  
Wind Power ◽  
Reactive Power ◽  
Flow Analysis ◽  
Load Flow ◽  
Synchronous Generators ◽  
Induction Generators ◽  
Load Flow Analysis ◽  
Wind Power Systems ◽  
Operation Characteristics

The induction generators (IGs) are basic to wind energy conversion. They produce the active power and consume the reactive power, with the voltage characteristics fragile compared with that of the synchronous generators and doubly-fed IGs. In the stressed system states, they may intensify var imbalance, yielding undesirable operation of zone 3 impedance relays.In this paper, the operation characteristics of the zone 3 relays in the wind power systems is studied. With the theoretical and load flow analysis, it is proved that the equivalent impedance of the IGs lies in the 2nd quadrature, possibly seen as the backward faults by the mho relays, i.e. the apparent impedance enters into the protection region from the left side. The undesirable operation may be caused by more wind power, larger load, less var compensation, and larger torque angle.

Symmetrical Short Circuit Parameter Differences of Double Fed Induction Generator and Synchronous Generator Based Wind Turbine

2017 ◽  
Vol 6 (2) ◽  
pp. 268 ◽  
Author(s):  
Muhammad Shahzad Nazir ◽  
Qinghua Wu ◽  
Mengshi Li ◽  
Luliang Zhang
Keyword(s):  
Power Systems ◽  
Wind Power ◽  
Fault Tolerant ◽  
Short Circuit ◽  
Power Conversion ◽  
Synchronous Generator ◽  
Circuit Parameter ◽  
Transient Time ◽  
Induction Generators ◽  
Wind Power Systems

<p>Considering the importance of perturbations during short circuit (SC) in power conversion devices, this study designed to find out the efficacy of symmetrical short circuit (SSC) of the synchronous generator (SG) and doubly fed induction generators (DFIG). Both wind power systems were separately built (Park’s model) and simulated. Simulation results showed that the DFIG is more efficient, fault tolerant, and proficient systems as compared to the SG based on the transient time, steady state, maximum current, and voltage dip values. This study can extend to design protection schemes, more accurate, stable and optimal proficient wind power conversion devices.</p>

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