Modeling and Analysis of an LCC HVDC System Using DC Voltage Control to Improve Transient Response and Short-Term Power Transfer Capability

Kwon, Dohoon; Kim, Young-Jin; Moon, Seong-Yong

doi:10.1109/tpwrd.2018.2805905

Cited by 51 publications

(30 citation statements)

References 34 publications

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“…This is understandable as a higher DC current or a higher DC voltage (both contribute to higher DC power transfer) is not favorable for the success of commutations. Recently, reference [9] proposed a method to use DC voltage control at rectifier side together with inverter DC current control to increase the shortterm power transfer capability of LCC HVDC. The method works by estimating the DC voltage reference (using the DC power reference at inverter side) and transmitting it to rectifier side through telecommunication links.…”

Section: Introductionmentioning

confidence: 99%

Series Capacitor Compensated AC Filterless Flexible LCC HVDC With Enhanced Power Transfer Under Unbalanced Faults

Xue

Zhang

Yang

2019

IEEE Trans. Power Syst.

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Section: Introductionmentioning

confidence: 99%

Series Capacitor Compensated AC Filterless Flexible LCC HVDC With Enhanced Power Transfer Under Unbalanced Faults

Xue

Zhang

Yang

2019

IEEE Trans. Power Syst.

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“…In recent years, the impact of HVDC CF on the safety and stability of an AC power grid has elicited increasing attention [6][7][8][9][10][11][12]. The influence mechanism of CF on the stability of a sending-end AC grid was investigated in [6].…”

Section: Introductionmentioning

confidence: 99%

“…When the commutation process of a DC system returns to normal, the low power recovery rate will result in continuous power imbalance in an AC grid. In consideration of the fast power control capability of a DC system [11], a DC power compensation modulation method that is implemented after CF recovery was proposed in [12]; this method can reduce tripped generator capacity in a sending-end system. The aforementioned studies focused on control methods that can address the impact of a single CF.…”

Section: Introductionmentioning

confidence: 99%

Ride-Through Control Method for the Continuous Commutation Failures of HVDC Systems Based on DC Emergency Power Control

Xiao¹,

Han²,

Ouyang

et al. 2019

Energies

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Continuous commutation failures (CFs) are serious malfunctions in line-commutated converter high-voltage direct current (HVDC) systems that cause the continuous and rapid sag of transmitted power and may threaten the stability of AC systems. The conventional emergency control strategies of AC systems exhibit difficulty in responding quickly and accurately. After suffering from continuous CFs, the forced blocking of direct current (DC) converter to prevent AC system instability might also cause other adverse effects. This study proposes a ride-through control method to improve the endurance capability of AC systems against continuous CFs. An active power output model of inverter station under continuous CFs is built, while considering the process and mechanism of CFs. The impact of continuous DC power sag on the stability of sending-end system is analyzed through a four-area AC/DC equivalent model. A rolling calculation model for the power angle and acceleration area variations of the sending-end system during continuous CFs is established on the basis of model predictive control theory. A calculation method for the emergency power control reference is obtained by using the aforementioned models. Lastly, a ride-through control method for continuous CFs is developed by utilizing the emergency control of adjacent HVDC link. Simulation results show that the proposed control method can improve the endurance capability of an AC system to continuous CFs and reduce blocking risk in an HVDC link.

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“…LCC-VSC technology can better stabilize the frequency and voltage of the AC system. In [15], a new control method for LCC-HVDCs was introduced, which can regulate both the direct-current (DC) voltage and the current of an LCC-HVDC system to increase the short-term operating margin of DC power transfer and improve the transient responses to DC power references. It can be used for reference for hybrid HVDC transmission systems.…”

mentioning

confidence: 99%

AC fault ride through control strategy on inverter side of hybrid HVDC transmission systems

Zhou

Chen

Wang

et al. 2019

J. Mod. Power Syst. Clean Energy

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Hybrid high-voltage direct current (HVDC) transmission systems employ a new type of HVDC transmission topology that combines the advantages of the linecommutated converter system and the voltage-source converter system. They can improve the efficiency and reliability of long-distance power transmission. However, realizing alternating-current (AC) grid-fault ride through on the inverter side of a hybrid HVDC transmission system is a challenge considering that a voltage-source converter based HVDC (VSC-HVDC) is used on the inverter side. In this study, a control strategy for an overvoltage fixed trigger angle based on the power-balance method is developed by fully utilizing the operation characteristics of a hybrid HVDC transmission system. The strategy reduces the inverter-side overvoltage of the HVDC system under a fault in the inverter-side AC system. Simulations based on Gezhou Dam are conducted to validate the effectiveness of the proposed strategy.

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Modeling and Analysis of an LCC HVDC System Using DC Voltage Control to Improve Transient Response and Short-Term Power Transfer Capability

Cited by 51 publications

References 34 publications

Series Capacitor Compensated AC Filterless Flexible LCC HVDC With Enhanced Power Transfer Under Unbalanced Faults

Series Capacitor Compensated AC Filterless Flexible LCC HVDC With Enhanced Power Transfer Under Unbalanced Faults

Ride-Through Control Method for the Continuous Commutation Failures of HVDC Systems Based on DC Emergency Power Control

AC fault ride through control strategy on inverter side of hybrid HVDC transmission systems

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