Applying high‐voltage direct current emergency control to suppress the peak value of ultra‐high‐voltage tie‐line power oscillation

Zhou, Xin; Zhang, Bing; Wen, Jinyu; Waqar, Asad

doi:10.1049/iet-gtd.2015.0798

Cited by 8 publications

(1 citation statement)

References 21 publications

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“…When continuous CFs occurs in one of DC links, the flowchart of DC emergency power control is shown in Figure 5. During continuous CFs, the emergency power support control of an adjacent non-CF DC system can reduce the equivalent mechanical power variation and improve the first swing transient stability of the sending-end system; however, the HVDC emergency control should exit on time to avoid the adverse effects on the reverse swing stability [19,20]. Considering that the first swing instability mode after the disturbance generally occurs approximately 1.5 s after the fault [21], the exit time of the DC emergency power control is set as 1.5 s after the fault.…”

Section: Calculation Of Emergency Power Control Referencementioning

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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Section: Calculation Of Emergency Power Control Referencementioning

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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Coordination planning of wind farm, energy storage and transmission network with high-penetration renewable energy

Zhang

Cheng

et al. 2020

International Journal of Electrical Power & Energy Systems

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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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Applying high‐voltage direct current emergency control to suppress the peak value of ultra‐high‐voltage tie‐line power oscillation

Cited by 8 publications

References 21 publications

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

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

Coordination planning of wind farm, energy storage and transmission network with high-penetration renewable energy

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

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