Coordinated Control Strategy for Transient Performance Improvement of LCC Based HVDC Transmission System with STATCOM Under Weak AC Grid

Rehman, Atiq Ur; Zhao, Chengyong; Guo, Chunyi

doi:10.1109/ei2.2018.8582080

Cited by 8 publications

(4 citation statements)

References 13 publications

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“…Weak LCC-HVDC station has usually longer fault recovery times. This fault recovery time could be minimized in order to mitigate energy losses [12,13].…”

Section: Power Recovery Timementioning

confidence: 99%

Transient Performance Analysis of Reactive Power Compensators at LCC-HVDC Station Feeding Weak AC System

Rehman

Gul

Mir

et al. 2021

Mehran Univ. res. j. eng. technol.

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This paper focuses on analyzing the dynamic performance of various reactive power compensators at weak LCC-HVDC terminals. Four scenarios based on combination of active and passive reactive power compensation schemes are presented. The comparative performance analysis of various compensators in different types of AC and DC system faults are evaluated using electromagnetic transient simulation program PSCAD/EMTDC. The analysis shows that fixed capacitor has poor performance and results in reducing effective short circuit ratio of system, while STATCOM on the other hand, increases AC system strength and has significant performance in areas like immunity to commutation failure, suppression of temporary overvoltage, AC bus voltage regulation and fault recovery time.

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“…Weak LCC-HVDC station has usually longer fault recovery times. This fault recovery time could be minimized in order to mitigate energy losses [12,13].…”

Section: Power Recovery Timementioning

confidence: 99%

Transient Performance Analysis of Reactive Power Compensators at LCC-HVDC Station Feeding Weak AC System

Rehman

Gul

Mir

et al. 2021

Mehran Univ. res. j. eng. technol.

Self Cite

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“…Figure. 4 shows the recovery response by the proposed method. It can be seen that the system can recover to normal operation in about 300ms, and no continuous CF happens.…”

Section: Case Studiesmentioning

confidence: 99%

“…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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“…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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Coordinated Control Strategy for Transient Performance Improvement of LCC Based HVDC Transmission System with STATCOM Under Weak AC Grid

Cited by 8 publications

References 13 publications

Transient Performance Analysis of Reactive Power Compensators at LCC-HVDC Station Feeding Weak AC System

Transient Performance Analysis of Reactive Power Compensators at LCC-HVDC Station Feeding Weak AC System

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

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

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