Improvement of HVDC commutation failure response based on compound phase‐shifting control

Wang, Shijia; Lu, Shaoqi; Hou, Yuqiang; Liu, Fusuo; Xu, Zheng

doi:10.1049/joe.2017.0576

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…Similarly, the ending time of predicted imaginary commutation process t' ipre can be acquired by comparing A suIm and A deImpre . Based on (14), the predicted imaginary EA γ Impre can be calculated as:…”

Section: Calculation Of Predicted Imaginary Ea With DC Current Predic...mentioning

confidence: 99%

“…In addition, the advancing firing angle (FA) control is proposed to improve the control performance of the constant extinction angle (CEA) controller. The CEA controller can be classified into two categories: one is the measured-type controller such as CIGRE control [13] and SIEMENS control [14], [15], and the other is the predictedtype controller such as ABB control [15], [16] and the proposed methods in [17]- [20].…”

Section: Introductionmentioning

confidence: 99%

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Commutation Failure Mitigation Method Based on Imaginary Commutation Process

Zhou

Xia

Hong

et al. 2022

Journal of Modern Power Systems and Clean Energy

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The commutation failure (CF) mitigation effectiveness is normally restricted by the delay of extinction angle (EA) measurement or the errors of existing prediction methods for EA or firing angle (FA). For this purpose, this paper proposes a CF mitigation method based on the imaginary commutation process. For each sample point, an imaginary commutation process is constructed to simulate the actual commutation process. Then, the imaginary EA is calculated by comparing the imaginary supply voltage-time area and the imaginary demand voltage-time area, which can update the imaginary EA earlier than the measured EA. In addition, the proposed method considers the impacts of commutation voltage variation, DC current variation, and phase angle shift of commutation voltage on the commutation process, which can ensure a more accurate EA calculation. Moreover, the DC current prediction is proposed to improve the CF mitigation performance under the single-phase AC faults. Finally, the simulation results based on CIGRE model prove that the proposed method has a good performance in CF mitigation.

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Section: Calculation Of Predicted Imaginary Ea With DC Current Predic...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Commutation Failure Mitigation Method Based on Imaginary Commutation Process

Zhou

Xia

Hong

et al. 2022

Journal of Modern Power Systems and Clean Energy

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“…For the two types of control strategies, the calculations of the firing angle order are different, but the key idea of the control system during the transient is very similar, which is to enlarge the margin of extinction angle by triggering the thyristor gates in advance. Many auxiliary controls have been proposed to improve the performance under large disturbances [10,11], among which the commutation failure prevention (CFPREV) mechanism has been widely applied [12]. In addition, many different types of dynamic var sources have been used to enhance the immunity against CFs, e.g., synchronous compensator (SC), static synchronous compensator (STATCOM) [13,14], etc.…”

Section: Introductionmentioning

confidence: 99%

An Adaptive Phase Locked Oscillator to Improve the Performance of Fault Recovery from Commutation Failure in LCC-Based HVDC Systems

Cai¹,

Li²,

Zhou

et al. 2023

Energies

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An adaptive control of phase lock oscillator (PLO) is proposed to increase the ability of LCC-based HVDC systems to successfully recover from commutation failure, where the dynamic performance during the recovery process is improved. The phase lock oscillator is one of the most important parts of the control system, which is used to trace the phase angle of commutating voltage. However, the PLO with constant parameters cannot provide accurate information under both steady-state operation and large disturbances. In our work, the control parameters of PLO can be adaptively adjusted, following the states of commutating voltage. When the system is operating in a steady state, the PLO selects parameters that exhibit improved small-signal stability, while parameters prioritizing dynamic behaviors with high-tracing accuracy are adopted during large disturbances. Case studies based on simulations in PSCAD/EMTDC and RT-LAB show that the proposed control strategy can improve the performance of fault recovery from CF.

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“…To overcome this problem, the authors proposed a pseudo extinction angle calculation method to improve the performance of controllers. In [12], a compound phase-shifting control is proposed to shorten the response speed of PI-controllers. Moreover, if the response characteristic of PI controllers is considered, the overshoot of the firing angle order may induce unexpected CFs.…”

Section: Introductionmentioning

confidence: 99%

A Control Strategy for Recovery from Commutation Failures in LCC-based HVDC Systems Based on Trajectory Prediction

Wu¹,

Shen²,

Hua³

et al. 2020

dteees

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Commutation failures are very common in LCC-based HVDC systems, and many control strategies have been developed to enhance the immunity against commutation failures. Among these strategies, one key idea is to enlarge the commutation margin by firing the gate with a specific time advance. However, the controllers based on PI-scheme may induce unexpected overshoot, leading to the failure of recovery. A recovery strategy to eliminate the overshoot is proposed for improving the performance of recovery from commutation failures, where the fast-changing trend of system states including commutating voltage and dc current are considered. Case studies show the effectiveness of the proposed method.

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Improvement of HVDC commutation failure response based on compound phase‐shifting control

Cited by 7 publications

References 4 publications

Commutation Failure Mitigation Method Based on Imaginary Commutation Process

Commutation Failure Mitigation Method Based on Imaginary Commutation Process

An Adaptive Phase Locked Oscillator to Improve the Performance of Fault Recovery from Commutation Failure in LCC-Based HVDC Systems

A Control Strategy for Recovery from Commutation Failures in LCC-based HVDC Systems Based on Trajectory Prediction

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