Switching System's MLE Based Transient Stability Assessment of AC/DC Hybrid System Considering Continuous Commutation Failure

Hu, Jiawei; Wang, Tong; Wang, Zengping; Liu, Jiuliang; Bi, Jingtian

doi:10.1109/tpwrs.2020.3007651

Cited by 19 publications

(3 citation statements)

References 25 publications

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“…The critical extinction advance angles range from 7° to 10° according to [10, 33]. To ensure the extinction advance angles keep away from the critical value and guarantee sufficient stability margin, the critical value of

\gamma _{min}

is selected to be 10° in this paper.…”

Section: Case Studymentioning

confidence: 99%

“…In [9], a transient stability boundary calculation method of AC/DC system based on dynamic energy analysis is proposed, which yet ignores CFs. In [10], an online transient stability assessment method of AC/DC hybrid system considering CFs is proposed, which is lack of further research on TSEC. In [7], a wide-area-signals-based feedback controller is designed to improve the stability but ignores the effect of CFs on transient stability.…”

Section: Introductionmentioning

confidence: 99%

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Transient stability emergency control for AC/DC grids considering successive commutation failures

Geng

Jiang

et al. 2021

IET Generation Trans & Dist

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The prevalence of Line‐Commutated Converter (LCC) HVDC makes the coupling and interaction phenomenon between AC system and DC system of particular complicated. There are significant challenges to determine control strategy using state‐of‐the‐art approaches especially when discrete events (e.g. switching and state resetting) happen frequently due to successive commutation failures (CFs). An enhanced transient stability emergency control (TSEC) for AC/DC grids based on the optimal control is presented to maintain the transient stability and mitigate the successive CFs caused by AC faults. In the proposed TSEC method, an extinction advance angle constraint is added to the TSEC model to mitigate the successive CFs. The emergency power control of LCC‐HVDC is employed as an additional control measure to reduce generator‐tripping and load‐shedding amount. The direct sequential approach is adopted to obtain the optimal solution of TSEC to improve the calculation efficiency. In the direct sequential approach, the modified adjoint sensitivity analysis (MASA) with the consideration of adjoint jump conditions is utilized to increase the gradient calculation accuracy. The effectiveness of the control strategies and the accuracy of the sensitivity calculation are verified on two test systems.

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\gamma _{min}

is selected to be 10° in this paper.…”

Section: Case Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transient stability emergency control for AC/DC grids considering successive commutation failures

Geng

Jiang

et al. 2021

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…Additionally, an SCF may occur during the AC fault [11] or during the recovery after the clearance of the AC fault [12]. Moreover, an SCF may occur due to another AC fault, such as a cascading failure or a reclosure on a permanent AC fault [13]. Therefore, SCFs are divided into Category 1, Category 2, and Category 3 SCFs.…”

Section: Introductionmentioning

confidence: 99%

Mechanism Analysis of a Subsequent Commutation Failure and a DC Power Recovery Speed Control Strategy

Zheng

Wang

et al. 2022

Electronics

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A subsequent commutation failure (SCF) of the Line-Commutated Converter–High-Voltage Direct Current (LCC-HVDC) may occur during the recovery after the clearance of an AC fault, seriously threatening the safe and stable operation of the LCC-HVDC and the entire post-fault AC/DC hybrid power system. In this study, the mechanism of an SCF as affected by the transient stability was analyzed, and a DC power recovery speed control strategy is proposed as an additional form of control to prevent the occurrence of SCFs. First, the sending-end and receiving-end power systems were modeled as synchronous generators instead of ideal voltage sources, and the mechanism of an SCF as affected by the transient stability was analyzed and verified. Second, the ramp function was adopted to describe the recovery characteristic of DC power, and a model of its recovery was established. Then, the recovery speed control strategy is presented based on the mechanism analysis of SCFs, which can not only be used to avoid the occurrence of SCFs but also increase the transient stability margin of the sending-end power system. Finally, the effectiveness and robustness of the proposed control strategy were validated by using a hybrid electromechanical–electromagnetic model and the full electromagnetic model of the IEEE 39-bus asynchronous interconnection test power system. With the implementation of the proposed control strategy, the safe and stable operation of the LCC-HVDC and AC/DC hybrid power system can be guaranteed. The adaptive DC power recovery speed control strategy will be further investigated in future research work.

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Maximum Lyapunov Exponent Based Nearest Neighbor Algorithm For Real-Time Transient Stability Assessment

Sayyeda,

Ghandhari,

Eriksson

2024

Electric Power Systems Research

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Switching System's MLE Based Transient Stability Assessment of AC/DC Hybrid System Considering Continuous Commutation Failure

Cited by 19 publications

References 25 publications

Transient stability emergency control for AC/DC grids considering successive commutation failures

Transient stability emergency control for AC/DC grids considering successive commutation failures

Mechanism Analysis of a Subsequent Commutation Failure and a DC Power Recovery Speed Control Strategy

Maximum Lyapunov Exponent Based Nearest Neighbor Algorithm For Real-Time Transient Stability Assessment

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