The mechanism and solution of the anomalous commutation failure of multi-infeed HVDC transmission systems

Tan, Li; Zhao, Tong; Lv, Mingchao; Zou, Liang; Zhang, Li

doi:10.1016/j.ijepes.2019.105400

Cited by 17 publications

(5 citation statements)

References 10 publications

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“…e values of S max 2 and S max 3 in Figures 11(c) and 11(d) with coordinated control are obviously larger than those with traditional control, showing that inverters 2 and 3 have more sufficient commutation margin under coordinated control. According to equation (19), the extinction angle will increase as ΔU i decreases, and this analysis is verified in Figures 11(e) and 11(f ). e black curves of c 2 and c 3 all fall to zero, indicating that the CCF occurs in both inverters 2 and 3 with traditional CFPREV control, while the lowest values of blue curves all stay above 10 °, showing that inverters 2 and 3 are prevented from the CCF under coordinated control.…”

Section: Simulation Verificationmentioning

confidence: 53%

“…Note that because this control scheme is applied in the AC fault transient process, the determination method of the control parameters above can only be a reference. For a given multi-infeed system, verification and adjustment of the parameters in (19) based on the simulation are required.…”

Section: Coordinated Control Scheme Of Cfprevs Inmentioning

confidence: 99%

“…References [16,17] consider the distribution of real and reactive power in interaction quantization, using the minimum eigenvalue of AC-DC Jacobian matrix and interactive effective short-circuit ratio, respectively, to determine the stability condition of the multi-infeed system. References [18,19] point out that the harmonic component generated in the transient process is also involved in the interaction between inverter stations and accordingly put forward critical indexes to evaluate the risk of CCFs caused by interaction. Although elements including AC network impedance, power distribution, and harmonic components have been discussed, none of the above researches take the impact of DC control strategy on the interaction between stations into consideration.…”

Section: Introductionmentioning

confidence: 99%

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Interaction Mechanism and Coordinated Control of Commutation Failure Prevention in Multi-Infeed Ultra-HVDC System

Yao

Wang

Xiong

et al. 2022

International Transactions on Electrical Energy Systems

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Commutation failure (CF) is an inherent drawback of line-commutated converter high-voltage DC (LCC-HVDC) system. And CF prevention (CFPREV) control is widely applied in UHVDC lines to mitigate the subsequent CF. However, the formation of a multi-infeed UHVDC system induces power exchange and voltage interaction between AC buses during the transient process, making the behaviors and mitigation of CFs more complex. Consequently, exploring the impact of CFPREV control on adjacent stations and optimizing the CFPREV control to adapt to the interaction characteristics in a multi-infeed system is necessary. Considering the interaction characteristics, the impact of CFPREV control on the commutation process of inverters in a multi-infeed system is analyzed through formula derivation and simulation verification. It is found that although CFPREV control can effectively mitigate the CFs of the inverter near the fault, it will further increase the risk of concurrent CF (CCF) of remote inverters due to the interaction on the AC side. To solve this problem, a coordinated control scheme of CFPREV controls in a multi-infeed UHVDC system is proposed. The output of the CFPREV control of the inverter near the fault can be adjusted adaptively according to the commutation margins of remote inverters. And the probability of CCF caused by CFPREV control is consequently decreased. Case studies are conducted based on Henan provincial multi-infeed UHVDC system in China to verify the analysis result and the effectiveness of the coordinated control scheme of CFPREV controls.

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Section: Simulation Verificationmentioning

confidence: 53%

Section: Coordinated Control Scheme Of Cfprevs Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interaction Mechanism and Coordinated Control of Commutation Failure Prevention in Multi-Infeed Ultra-HVDC System

Yao

Wang

Xiong

et al. 2022

International Transactions on Electrical Energy Systems

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“…he line commutated converter (LCC) HVDC is widely used in large capacity and long-distance power transmission across regions all over the world [1]. However, because of the strong coupling between the AC and DC systems, an AC system fault can easily cause commutation failure (CF) of the inverter [2], [3]. After the 1st CF, during the recovery process, subsequent commutation failure (SCF) can also easily occur because of the interaction of electrical quantity and control quantity.…”

Section: ⅰ Introductionmentioning

confidence: 99%

A Novel Recovery Strategy to Suppress Subsequent Commutation Failure in an LCC-Based HVDC

Su,

Yin,

et al. 2024

Prot. Control Mod. Power Syst.

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A subsequent commutation failure (SCF) can easily occur during the recovery process after a first commutation failure (1st CF). This paper analyzes the interaction mechanism of extinction angle, AC voltage, DC current and firing angle, and reveals that the complex coupling relationship during the dynamic process after the 1st CF has a significant effect on the SCF. The mathematical equations when considering different fault durations, fault severities and AC system strengths are then established. An AC fault voltage detection method based on reactive power and fault duration is also proposed to measure the fault severity, and an SCF inhibition control strategy (SCFICS) based on AC fault detection and reactive power control is subsequently proposed. This can not only inhibit the SCF, but also enhance the DC recovery speed effectively. Finally, based on the SCFICS, a simulation model is built, and the simulation results with different cases indicate that the SCFICS can effectively inhibit the SCF with good recovery performance, for three-phase-to-ground (TPG) and single-phase-to-ground faults, and with a fault inductance range of 0.01 H to 1 H.

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“…So as to figure out the matter of commutation failure of HVDC and cut down the frequency of commutation failure in high-voltage DC transmission of the line commutation converter (LCC-HVDC), literature [22] designed a coordinated control strategy between the DC chopper and LCC-HVDC, whose aim is to reduce the incidence of failures and improve failure recovery performance. To address the matter of transmission system instability caused by frequent commutation fault in the HVDC system, a fault division strategy based on fault current limiter is proposed in literature [23], which is proved to be an effective way to solve the commutation fault. However, the fuzzy control algorithm used in this paper is not perfect.…”

mentioning

confidence: 99%

Research on Transient Overvoltage Suppression Measures for Photovoltaics Connected to the DC Sending End in the Smart Power System for Industry 4.0

Niu

Shen

et al. 2020

Mathematical Problems in Engineering

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The development of smart power systems in Industry 4.0 will bring people better quality electrical energy. The photovoltaic power generation system in the smart grid for Industry 4.0 is also the focus of development. The rapid development of photovoltaic power generation systems will bring people cleaner and greener energy. However, it will cause the transient overvoltage phenomenon near the DC sending terminal when the large-scale photovoltaic plant is connected to the power grid, further bringing about a profound impact on the power grid and its security and stability. In this paper, it is proposed that the rise of transient overvoltage at the photovoltaic terminal is caused by three main factors including the reactive power surplus of DC commutation failure, the weak power grid at the sending terminal, and the control characteristics of the photovoltaic plant. Then, the coordinated control strategy of transient overvoltage is proposed, and the overvoltage control strategy of the DC transmission terminal and the photovoltaic power plant control strategy are, respectively, optimized. Finally, the influence parameters of overvoltage are analysed and the corresponding photovoltaic strategy is presented. The optimization results of photovoltaic parameters and the proposed strategies of photovoltaic power generation can effectively restrain the voltage or frequency fluctuation and power oscillation caused by HVDC commutation failure. This study promotes the development of the photovoltaic power generation system in the intelligent power system of industry 4.0.

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The mechanism and solution of the anomalous commutation failure of multi-infeed HVDC transmission systems

Cited by 17 publications

References 10 publications

Interaction Mechanism and Coordinated Control of Commutation Failure Prevention in Multi-Infeed Ultra-HVDC System

Interaction Mechanism and Coordinated Control of Commutation Failure Prevention in Multi-Infeed Ultra-HVDC System

A Novel Recovery Strategy to Suppress Subsequent Commutation Failure in an LCC-Based HVDC

Research on Transient Overvoltage Suppression Measures for Photovoltaics Connected to the DC Sending End in the Smart Power System for Industry 4.0

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