New Control of Wind Turbines Ensuring Stable and Secure Operation Following Islanding of Wind Farms

Erlich, I.; Korai, Abdul W.; Neumann, Tobias; Zadeh, M. Koochack; Vogt, S.; Buchhagen, Christoph; Rauscher, C.; Menze, Andreas; Jung, Jochen

doi:10.1109/tec.2017.2728703

Cited by 44 publications

(34 citation statements)

References 3 publications

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“…2 (b). The saturation of the modulation index to its maximum value of 1 results in overvoltage at the offshore AC network [23][24][25], as observed in Fig. 2 (b).…”

Section: Offshore Wtc Behaviors During DC Faults and Functional Rmentioning

confidence: 85%

“…2 (b). Similarly, the offshore frequency previously regulated by the offshore MMC will diverge after the blocking of the MMC, potentially leading to circulating power among wind turbine converters and resonance issues as presented in [24]. Such behavior leads to the shutdown of the offshore wind farm to avoid the catastrophic failures.…”

Section: Offshore Wtc Behaviors During DC Faults and Functional Rmentioning

confidence: 99%

“…In this manner, seamless, autonomous and controlled transition of the WTCs between grid following and forming modes based on local measurements is achieved. Thus, compared with the conventional grid following control method [23][24][25] as in Fig. 2, the passive AC voltage controller avoids the saturation of the WTC controller so as to maintain the offshore AC voltage as demonstrated in Fig.…”

Section: Open Circuit Modementioning

confidence: 99%

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Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

Shi

Adam

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

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In recent years, several DC fault clearance schemes have emerged, in which reduced number of fast acting DC circuit breakers (DCCBs) and AC circuit breakers (ACCBs) are used to clear DC faults. In offshore DC grids, such approach entails opening of the ACCBs that connect the wind farms to the offshore HVDC stations which control offshore AC voltages and frequencies, potentially leading to uncontrolled offshore voltage and frequency. Existing studies show that the loss of offshore converter due to blocking or sudden opening of ACCBs can cause significant over-voltage and over-frequency in the offshore AC grid, which could necessitate immediate shutdown of the wind farm. An enhanced control for wind turbine converters (WTCs) of the offshore wind farm is proposed to enable retention of AC voltage and frequency control when the offshore converter is lost, in which seamless transition of the WTCs between grid following and forming modes is facilitated. The viability of the proposed control is demonstrated in wider context of partially selective DC fault protection in an illustrative meshed DC grid, which includes detailed implementations of DC fault clearance, system restart and power transfer resumption. The presented simulation results confirm the effectiveness of the proposed WTC control in preventing excessive rise of offshore AC voltage and frequency and facilitating DC fault ride-through using reduced number of DCCBs.

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“…2 (b). The saturation of the modulation index to its maximum value of 1 results in overvoltage at the offshore AC network [23][24][25], as observed in Fig. 2 (b).…”

Section: Offshore Wtc Behaviors During DC Faults and Functional Rmentioning

confidence: 85%

Section: Offshore Wtc Behaviors During DC Faults and Functional Rmentioning

confidence: 99%

Section: Open Circuit Modementioning

confidence: 99%

See 1 more Smart Citation

Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

Shi

Adam

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

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“…Recently, innovative concepts based on Virtual Impedance (VI) [10], [12], [16]- [18] have been implemented to emulate the effect of a physical impedance when the current exceeds its nominal value. These methods have shown their effectiveness to limit the current transients in case of lines tripping [10] and heavy load connection [12] while keeping the same nature of the power source "i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The activation of the virtual impedance results in a decrease of to since the total impedance increases. As a consequence, the system remains stable if the fault is cleared before expressed in (16).…”

Section: Introduction Of the Virtual Impedancementioning

confidence: 99%

Critical Clearing Time Determination and Enhancement of Grid-Forming Converters Embedding Virtual Impedance as Current Limitation Algorithm

Qoria

Gruson

Colas

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

141

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. This is an author-deposited version published in: https://sam.ensam.eu Handle IDAbstract-The present paper deals with the post-fault synchronization of a voltage source converter based on the droop control. In case of large disturbances on the grid, the current is limited via current limitation algorithms such as the virtual impedance. During the fault, the power converter internal frequency deviates resulting in a converter angle divergence. Thereby, the system may lose the synchronism after fault clearing and which may lead to instability. Hence, this paper proposes a theoretical approach to explain the dynamic behavior of the grid forming converter subject to a three phase bolted fault. A literal expression of the critical clearing time is defined. Due to the precise analysis of the phenomenon, a simple algorithm can be derived to enhance the transient stability. It is based on adaptive gain included in the droop control. These objectives have been achieved with no external information and without switching from one control to the other. To prove the effectiveness of the developed control, experimental test cases have been performed in different faulted conditions.

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Comprehensive review on low voltage ride through capability of wind turbine generators

Hiremath

Moger

2020

Int Trans Electr Energ Syst

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Wind energy has made more inroads in renewable power generation due to environmental impact of conventional energy sources. The high penetration of grid connected wind energy has emerged as a recent trend in many countries. On the other hand, the problem of power generation loss due to the grid fault also arisen. The recent technological advancement suggests the importance of low voltage ride through (LVRT) in wind energy conversion system (WECS). However, LVRT is a technique in making uninterrupted connectivity of WECS in the presence of grid fault. This paper presents the state of the art of LVRT capabilities of various wind turbine generators using FACTS devices and different converter controllers. Also, the main challenging issues and different approaching strategies in LVRT are addressed. Finally, extracting all important features from distinct papers, new dimension of LVRT is presented for the power quality and power generation loss problems.

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New Control of Wind Turbines Ensuring Stable and Secure Operation Following Islanding of Wind Farms

Cited by 44 publications

References 3 publications

Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

Critical Clearing Time Determination and Enhancement of Grid-Forming Converters Embedding Virtual Impedance as Current Limitation Algorithm

Comprehensive review on low voltage ride through capability of wind turbine generators

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