Enhanced control and operation for brushless doubly-fed induction generator based wind turbine system under grid voltage unbalance

Hu, Sheng; Zhu, Guorong

doi:10.1016/j.epsr.2022.107861

Cited by 7 publications

(15 citation statements)

References 16 publications

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“…Nevertheless, as shown in Figure 1, due to the direct connection between the PW of BDFG and the network, BDFG is very susceptible to network disturbances such as network voltage unbalance. The negative sequence component of unbalanced network voltages will lead to the unbalance of PW currents, distortions of RW and CW currents, pulsations of PW power, and machine torque [25][26][27]. These adverse effects have deleterious effects on WDBDFG and even lead to damage to its electrical and mechanical parts.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, it is very necessary to study the control methods for WDBDFG under network unbalance so as to improve the capability to resist the network unbalance. Thus far, the modeling and control for WDBDFG under network unbalance have been investigated in [25][26][27][28][29]. Nevertheless, the controls in [25,28,29] have similar drawbacks, including adopting a double-closed loop control structure, involving the decomposition of both CW and PW current sequence components, and the cross-coupling terms in control loops being totally or partially neglected.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, since it was not CW current references but the PW current references under different control objectives were deduced, a double-closed loop design was needed. In order to address the problems mentioned above, improved controls were proposed in [26,27], where a single-loop proportional-integral (PI) controller for CW current was proposed to realize the control objectives set. Moreover, because feedforward control was also applied in the CW loop by using all the disturbances and couplings deduced, decoupled control was also improved.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Proportional-Integral-Resonant Current Control Strategy for a Wind-Driven Brushless Doubly Fed Generator during Network Unbalance

Cai,

Liu,

et al. 2024

Electronics

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This article proposes a proportional-integral-resonant (PIR) current control strategy for a wind-driven brushless doubly fed generator (WDBDFG) during network unbalance. Firstly, four control objectives of WDBDFG, including eliminating unbalanced currents of power winding (PW), pulsations of control winding (CW) currents, torque, and PW power, are discussed and different from current controls in which the references to PW currents were computed; the CW current references are derived here. Then, an improved CW current controller using a PIR controller is proposed to achieve different control objectives. In contrast with current controls, CW currents are not involved with sequence extraction in the proposed control and can be totally regulated only in a positive synchronous reference frame. Hence, the system control structure is greatly simplified, and dynamic characteristics are improved. Furthermore, in order to obtain completely decoupled control of current and average power, feedforward control, considering all the couplings and perturbances, is also applied in CW current loops. Simulation results for a 2 MW grid-connected WDBDFG show that the proposed control is capable of achieving four control objectives, including canceling CW current distortion, PW current unbalance, pulsations of PW active power or pulsations of reactive power, and machine torque. Its dynamic process is much more smoothly and quickly than that of current controls, and therefore the proposed control has better dynamic control characteristics during network unbalance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Proportional-Integral-Resonant Current Control Strategy for a Wind-Driven Brushless Doubly Fed Generator during Network Unbalance

Cai,

Liu,

et al. 2024

Electronics

Self Cite

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“…e rotor will be of a special type that indirectly couples both stator elds, a process known as cross-coupling, allowing the machine to operate in synchronous mode. Maximum power output from WECS can be extracted by varying APW frequency using machine-side converter, while grid side converter maintains reactive power exchange with the grid [1][2][3]. e design and analysis of a BDFIM with a dual cage rotor have been detailed [4].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Mathematical Modeling of the Brushless Doubly Fed Induction Generator-Based Wind Electric Conversion System

Vanitha

Resmi

Kumar³

2022

Mathematical Problems in Engineering

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Electricity generation with minimal environmental pollution is required for the world’s sustainable future, and wind electric generation is one of them. Brushless doubly fed induction generator (BDFIG), which derives from cascade induction machine technology, has grown in popularity as a wind electric generator due to advantages over doubly fed induction generator (DFIG) and permanent magnet synchronous generator (PMSG) such as the absence of slip rings and brushes and high-cost permanent magnets. Wind energy research is critical for any country’s economic development and long-term sustainability. As a result, an experimental setup in a laboratory is required to replicate the behaviour of a wind turbine in the steady state. This study discusses the emulation of wind turbine characteristics in the laboratory using a prototype of a separately excited DC motor mechanically coupled to a brushless doubly fed induction generator (BDFIG). The wind turbine emulator-brushless doubly fed induction machine (WTE-BDFIM) prototype was tested in the laboratory under high power and low wind speed conditions. As a result, the simulation of the same hardware configuration in MATLAB was performed to investigate the overall performance of the BDFIM-based WECS. To determine the equivalent circuit parameters of the BDFIM, which are required for simulation, tests were performed on a prototype of 3.5 kW, 2/6 pole, 400 V, star/delta-star, and BDFIM in two modes, namely, the simple induction mode and the cascade induction mode. Based on the BDFIM parameters, a MATLAB Simulink model of a BDFIG-based wind electric conversion system (WECS) is created and its performance is investigated. Results of both hardware and simulation show that BDFIG can be used as the wind electric generator over a wider speed range compared to that of DFIG, an important feature that is required to get maximum power extraction from the wind turbine.

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“…МПЖ може працювати в таких режимах: у режимі підключення до мережі [18][19][20][21], а також в автономному режимі [22][23][24][25][26][27][28][29]. У випадку використання СГЕ з підключенням до мережі основна увага в роботі та методах керування полягає в моделюванні МПЖ [30], регулюванні активної та реактивної потужностей [19,31,32], здатності витримувати провали в напрузі мережі [18,31] і компенсації несиметрії мережі [19,22,[31][32][33]…”

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Control Strategies to Eliminate Harmonics in Power Generation Systems Based on a Doubly-Fed Induction Generator

Shapoval¹,

Mykhalskyi²,

Artemenko³

et al. 2022

Praci Inst. elektrodin. Nac. akad. nauk Ukr.

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The variable speed power generation system based on a doubly-fed induction generator is the most popular in the wind industry. The stator is connected directly to the mains in such a generator, while the rotor is connected to the mains via a semiconductor converter. Low electric power quality increases energy and economic losses, leading to operational problems of production. Many publications discuss improving the electric power quality, particularly methods for eliminating harmonics for a power generation system based on a doubly-fed induction generator. Critical evaluation is needed to choose a method of eliminating harmonies for a particular case. The article presents an overview of different control methods for harmonic elimination in power generation systems based on a doubly-fed induction generator. Various strategies are used, which are used both in autonomous systems and in the mode of connection to the network. During the review of control methods for harmonic elimination, their different characteristics were noted, and the ad-vantages and disadvantages of each method were considered. Ref. 53, fig. 6.

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Enhanced control and operation for brushless doubly-fed induction generator based wind turbine system under grid voltage unbalance

Cited by 7 publications

References 16 publications

A Proportional-Integral-Resonant Current Control Strategy for a Wind-Driven Brushless Doubly Fed Generator during Network Unbalance

A Proportional-Integral-Resonant Current Control Strategy for a Wind-Driven Brushless Doubly Fed Generator during Network Unbalance

Fabrication and Mathematical Modeling of the Brushless Doubly Fed Induction Generator-Based Wind Electric Conversion System

Control Strategies to Eliminate Harmonics in Power Generation Systems Based on a Doubly-Fed Induction Generator

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