Analytical on‐line method of determining transient stability margin using protection information for asymmetric faults

Wang, Tong; Liu, Jiuliang; Zhu, Shaoxuan; Wang, Zengping

doi:10.1049/iet-gtd.2019.0239

Cited by 6 publications

(6 citation statements)

References 23 publications

(19 reference statements)

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“…The disabling criterion is given in Equation ( 29), and a time window was added to improve the reliability of the proposed disabling criterion. dI di /dt< 0 lasts for T e /4 (29) In conclusion, when the AC fault is cleared, the DC power recovery speed control will be enabled when a risk that an SCF will occur is detected based on Equation (20). Then, the DC current order output of the VDCOL is modified based on Equation (28) to limit the recovery speed of the DC power, thereby preventing the occurrence of an SCF as affected by transient stability.…”

Section: Recovery Speed Control Strategymentioning

confidence: 99%

“…Then, the DC current order output of the VDCOL is modified based on Equation (28) to limit the recovery speed of the DC power, thereby preventing the occurrence of an SCF as affected by transient stability. Then, the proposed control strategy is disabled based on Equation (29) to avoid the DC power fluctuation caused by disabling it. A detailed procedure flowchart for the proposed control strategy is given in Figure 11.…”

Section: Recovery Speed Control Strategymentioning

confidence: 99%

“…A detailed procedure flowchart for the proposed control strategy is given in Figure 11. In addition, AC fault information can be provided by relay protection devices [29].…”

Section: Recovery Speed Control Strategymentioning

confidence: 99%

“…The additional control (the red dotted line shown in Figure 13a) is enabled when Equation ( 20) is satisfied, while the DC power recovery speed is limited by modifying the output DC current order I olim to I olim = ς 2 I olim , so that the occurrence of the SCF is prevented. Then, the additional control is disabled based on Equation (29). Due to the occurrence of the SCF, it can be seen from the blue solid line in Figure 13c that the DC power fluctuates seriously during the recovery.…”

Section: Test Power Systemmentioning

confidence: 99%

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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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Section: Recovery Speed Control Strategymentioning

confidence: 99%

Section: Recovery Speed Control Strategymentioning

confidence: 99%

“…A detailed procedure flowchart for the proposed control strategy is given in Figure 11. In addition, AC fault information can be provided by relay protection devices [29].…”

Section: Recovery Speed Control Strategymentioning

confidence: 99%

Section: Test Power Systemmentioning

confidence: 99%

See 2 more Smart Citations

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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“…Transient stability has always been a critical and key issue for modern power system analysis and control for ensuring safe operation [5]. It is influenced by a number of factors, including network structure, fault type, and location [6]. There are two types of fault which are shunt fault and series fault [7].…”

Section: Introductionmentioning

confidence: 99%

Three-phase fault analysis of power system transient stability based on TCSC controller using FPA for its location

Otuo-Acheampong

Rashed

Mensah

et al. 2023

J. Phys.: Conf. Ser.

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Preventing the power system from becoming overloaded and under stress to the point where it is on the verge of reaching the limits of its transient stability due to high power consumption. This paper proposed the dynamic security assessment for transient stability using Thyristor controlled series capacitor (TCSC) devices controller. The stability criteria are based on the severity indices for analyzing the fault in the power system. The index uses the time domain analysis simulation, making it easier and simpler to implement for the system operators to better prepare for potential disturbances by anticipating how power systems will behave. The optimal location and parameters setting of the TCSC was determined by Flower Pollination Algorithm (FPA) due to its higher convergence rate. The proposed index is tested on the IEEE 14-bus system and further discusses the effect of a three-phase short circuit fault, different fault locations, and fault clearing method. An analysis is done to determine how the short circuit faults on lines affect the transient voltage stability of the load bus and generator bus in the system. The findings show that by employing TCSC, the voltage drop was acceptable improved and stability margins were greatly increased.

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Protection information based transient stability margin assessment of splitting islands

Xiang

Wang

2021

International Journal of Electrical Power & Energy Systems

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Analytical on‐line method of determining transient stability margin using protection information for asymmetric faults

Cited by 6 publications

References 23 publications

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

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

Three-phase fault analysis of power system transient stability based on TCSC controller using FPA for its location

Protection information based transient stability margin assessment of splitting islands

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