Optimal Allocation of Dynamic Var Sources for Reducing the Probability of Commutation Failure Occurrence in the Receiving-End Systems

Zhou, Yongzhi; Wu, Hao; Wei, Wei; Song, Yonghua; Deng, Hui

doi:10.1109/tpwrd.2018.2874976

Cited by 25 publications

(14 citation statements)

References 24 publications

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“…Proper configuration of reactive power compensation can increase the voltage stability level of the AC system and prevent the occurrence of the CFs [76]. Reactive power compensation planning and design include three variables: installation sites, capacity and response performance [77]. Different types of reactive power compensators play different roles in CF prevention.…”

Section: Prevention and Mitigation Of Cfsmentioning

confidence: 99%

“…In addition, compensators can be allocated between HVDC inverters to weaken their interactions. However, in an actual system, parallel‐type reactive power compensator devices are always allocated at the commutation buses to alleviate the voltage stability problem of the receiving‐end AC system caused by an insufficient transient reactive power [77]. The response speeds of STATCOM and VSC can meet the fast reactive power demand [78].…”

Section: Prevention and Mitigation Of Cfsmentioning

confidence: 99%

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Prevention and mitigation of high‐voltage direct current commutation failures: a review and future directions

Zhu

Zhang

Liu

et al. 2019

IET Generation, Transmission & Distribution

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Section: Prevention and Mitigation Of Cfsmentioning

confidence: 99%

Section: Prevention and Mitigation Of Cfsmentioning

confidence: 99%

Prevention and mitigation of high‐voltage direct current commutation failures: a review and future directions

Zhu

Zhang

Liu

et al. 2019

IET Generation, Transmission & Distribution

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“…If the CF continues to happen for a specific while, it will lead to the blocking of the HVDC system [2], threatening the safety of system operation. It becomes increasingly important to take further countermeasures to improve the immunity against CFs, and many papers have been dedicated to this topic, e.g., installing dynamic var sources [3][4][5], new converter structures [6,7], etc.…”

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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“…Several works have focused on evaluating the commutation failure of the LCC-HVDC system. An area of vulnerability (AOV) was discussed and a mechanism for the optimal allocation of dynamic VAR sources was proposed in [7] in order to decrease the commutation failure probability of the LCC-HVDC system at the inverter end. However, due to the use of steady-state equations for calculating the probability of commutation failure, the transient behavior of the extinction angle and phase shift in the AC voltage were not considered, which could lead to a decrease in the accuracy of the results.…”

Section: Introductionmentioning

confidence: 99%

A Quantitative Index to Evaluate the Commutation Failure Probability of LCC-HVDC with a Synchronous Condenser

et al. 2019

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Since thyristor cannot turn off automatically, line commutated converter based high voltage direct current (LCC-HVDC) will inevitably fail to commutate and therefore auxiliary controls or voltage control devices are needed to improve the commutation failure immunity of the LCC-HVDC system. The voltage control device, a synchronous condenser (SC), can effectively suppress the commutation failure of the LCC-HVDC system. However, there is a need for a proper evaluation index that can quantitatively assess the ability of the LCC-HVDC system to resist the occurrence of commutation failures. At present, the main quantitative evaluation indicators include the commutation failure immunity index and the commutation failure probability index. Although they can reflect the resistance of the LCC-HVDC system to commutation failures to a certain extent, they are all based on specific working conditions and cannot comprehensively evaluate the impact of SCs on suppressing the commutation failure of the LCC-HVDC system under certain fault ranges. In order to more comprehensively and quantitatively evaluate the influence of SCs on the commutation failure susceptibility of the LCC-HVDC system under certain fault ranges, this paper proposes the area ratio of commutation failure probability. The accuracy of this new index was verified through the PSCAD/EMTDC. Based on the CIGRE benchmark model, the effects of different synchronous condensers on LCC-HVDC commutation failure were analyzed. The results showed that the new index could effectively and more precisely evaluate the effect of SCs on commutation failures. Moreover, the proposed index could provide a theoretical basis for the capacity allocation of SCs in practical projects and it could also be utilized for evaluating the impact of other dynamic reactive power compensators on the commutation failure probability of the LCC-HVDC system under certain fault ranges.

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Optimal Allocation of Dynamic Var Sources for Reducing the Probability of Commutation Failure Occurrence in the Receiving-End Systems

Cited by 25 publications

References 24 publications

Prevention and mitigation of high‐voltage direct current commutation failures: a review and future directions

Prevention and mitigation of high‐voltage direct current commutation failures: a review and future directions

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

A Quantitative Index to Evaluate the Commutation Failure Probability of LCC-HVDC with a Synchronous Condenser

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