The Dynamic Control of Reactive Power for the Brushless Doubly Fed Induction Machine With Indirect Stator-Quantities Control Scheme

2015 ◽  
Vol 30 (9) ◽  
pp. 5046-5057 ◽  
Author(s):  
Rongli Zhao ◽  
Ailing Zhang ◽  
Yun Ma ◽  
Xin Wang ◽  
Jun Yan ◽  
...  
Keyword(s):  
Reactive Power ◽  
Dynamic Control ◽  
Induction Machine ◽  
Control Scheme ◽  
Doubly Fed Induction Machine ◽  
Doubly Fed

Control Scheme of a Brushless Doubly Fed Induction Machine for Stand-Alone Generator Systems

2013 ◽  
Vol 344 ◽  
pp. 153-158
Author(s):  
Chuan Zeng
Keyword(s):  
Induction Machine ◽  
Constant Voltage ◽  
Generator System ◽  
Voltage Output ◽  
Control Scheme ◽  
Doubly Fed Induction Machine ◽  
New Type ◽  
Doubly Fed ◽  
Doubly Fed Machine ◽  
Vector Control Strategy

The brushless doubly-fed machine (BDFM) is a new type of induction machine which has different structure and operation principle than a conventional AC machine. In this paper, the electromagnetic relation of BDFM is analyzed, and a stand-alone generator system is presented. Based on the analysis, the characteristic and applicability of scale and vector control strategy is build, both of which realize constant voltage output in stand-alone generator systems of variations load.

scholarly journals Grid Forming Stator Flux Control of Doubly-Fed Induction Generator

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6766
Author(s):  
Norbert Klaes ◽  
Florian Pöschke ◽  
Horst Schulte
Keyword(s):  
Reactive Power ◽  
Induction Machine ◽  
Induction Generator ◽  
System Response ◽  
Doubly Fed Induction Generator ◽  
Generator System ◽  
Flux Control ◽  
Doubly Fed Induction Machine ◽  
Stator Flux ◽  
Doubly Fed

The doubly fed induction generator is widely used in wind power applications. For stand-alone operation of this machine, the control of the stator flux with fixed voltage and frequency has been proposed. This paper extends the stator flux control of the doubly fed induction machine by droop mechanisms, which vary the setpoint of flux magnitude and frequency depending on active and reactive power. This gives the doubly fed induction generator system unknown grid supporting and grid forming performance. The validation of the proposed control scheme has been conducted on a 10kVA testbed system. The closed-loop behavior of the system has been proven to enable grid-tied and islanded operation with the same control structure. The system response to load changes and islanding events show no disruptive transients in both conditions.

scholarly journals Reliability of Variable Speed Pumped-Storage Plant

Electronics ◽  
2018 ◽  
Vol 7 (10) ◽  
pp. 265 ◽  
Author(s):  
Anto Joseph ◽  
Thanga Chelliah ◽  
Sze Lee ◽  
Kyo-Beum Lee
Keyword(s):  
Markov Model ◽  
Power Plants ◽  
Reactive Power ◽  
Induction Machine ◽  
Voltage Source ◽  
Variable Speed ◽  
Doubly Fed Induction Machine ◽  
Optimal Efficiency ◽  
Doubly Fed ◽  
Pumped Storage

The multi-channel (MC) back-to-back voltage source inverter (VSI)-fed doubly fed induction machine (DFIM) is emerging as a highly interesting topic in large-rated variable speed pumped-storage power plants (PSPP) in view of cost, optimal efficiency, and space requirements. Although the VSI is the fundamental part of the drive controlling the active/reactive power of the plant, redundancy is presently not adopted in practice causing the unit as a whole to shut down upon a failure in the converter and control circuit. This paper evaluates a large-rated (250 MW) DFIM-fed variable-speed unit of a PSPP in terms of its reliability and availability. A Markov model is developed to assess the reliability of the drive based on a number of factors including survivability and annual failure rate (FIT). Further, the Markov model is applied to different PSPPs for comparison of reliability among them.

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