Commutation failure analysis in multi-infeed HVDC systems

Rahimi, Ebrahim; Gole, A.M.; Davies, Brett W.; Fernando, I.T.; Kent, K.L.

doi:10.1109/pes.2011.6039091

Cited by 35 publications

(42 citation statements)

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“…Since the occurrence of a CF relates highly to the fault severity and the time of the fault [42], [43], thus in this paper, single-and three-phase inductive faults are applied to the inverter bus in the CIGRE HVDC benchmark system to verify the effectiveness of the proposed control strategy. The AC fault severity is represented by a inductance L f .…”

Section: Case Studymentioning

confidence: 99%

“…5. The data used in the model can be found in [42], and γ 0 is chosen as 7.2 • [6]. The AC-DC current criterion (ADCC) of identifying CFs is adopted to verify the effectiveness of control strategy in this paper, as it gives the most accurate assessment [37].…”

Section: Case Studymentioning

confidence: 99%

“…The schematic representation of a typical dual-infeed HVDC system is shown in Fig. 11 [41], in which the data in the model is from [42]. The AC fault severity is also represented by fault inductance L f , applied to the local inverter bus.…”

Section: ) Dual-infeed Hvdc System Modelmentioning

confidence: 99%

“…Due to the interaction between the multiple inverters at the receiving-end AC system, multi-infeed HVDC system has more complex CF behaviors than the single-infeed HVDC system, namely the anomalous CF phenomenon [42]. That is, concurrent CFs not only occur under more severe faults expected based on the existing results, but also occur under unexpected minor faults.…”

Section: ) Dual-infeed Hvdc System Modelmentioning

confidence: 99%

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Variable Extinction Angle Control Strategy Based on Virtual Resistance to Mitigate Commutation Failures in HVDC System

2020

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To mitigate commutation failures (CFs) and minimize the instability of HVDC systems due to AC faults or control mode ambiguity, a constant extinction voltage-time area based control strategy with virtual resistance is proposed. In this strategy, using sine-cosine components detector and considering zerocrossing phase shift of commutation voltage, the extinction angle setting value can be adjusted dynamically. Meanwhile, to reflect the characteristics of DC current during the fault and recovery process, a virtual resistance is introduced into the control system and DC voltage considering the voltage drop of the virtual resistance is taken as the input of voltage-dependent current order limiter (VDCOL). Through theoretical analysis, the proposed strategy not only reduces the firing angle dynamically, but also reduces DC current by lowering the current order on the rectifier side immediately when the AC voltage disturbance is detected, thereby further reducing the occurrence of CFs. Therefore, the control strategy can effectively suppress successive and intermittent CFs. The effectiveness of the proposed control strategy is verified by simulation of the single HVDC and multi-infeed HVDC model based on the CIGRE HVDC benchmark system, in which AC-DC current criterion of identifying CF and suppression ratio index are adopted. The simulation results show that the proposed control strategy can effectively mitigate CFs under single-phase and three-phase faults to a certain extent. Comparing with the existing control strategies based on controller modification, i.e. commutation failure prevention, DC current predictive control, smooth logic switching control and DC current limitation control strategy based on virtual resistance, the proposed control strategy is superior in mitigation effects. The average suppression rates of these strategies are 1.66%, 3.21%, 6.11%, 3.35%, and 8.33% under single-phase fault, respectively; with the rates of 1.4%, 2.72%, 4.97%, 0%, and 6.8% under three-phase fault, respectively.

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Section: Case Studymentioning

confidence: 99%

Section: Case Studymentioning

confidence: 99%

Section: ) Dual-infeed Hvdc System Modelmentioning

confidence: 99%

Section: ) Dual-infeed Hvdc System Modelmentioning

confidence: 99%

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Variable Extinction Angle Control Strategy Based on Virtual Resistance to Mitigate Commutation Failures in HVDC System

2020

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“…The introduction of HVDC transmission systems in an alternating-current (AC) system has led to the concept of hybrid AC/DC systems. With line-commutated thyristor converters widely adopted, commutation failures may occur due to the symmetric and asymmetric AC faults [1], [2]. Continuous commutation failures may cause a converter block, which leads to a potential power transfer from DC to AC lines.…”

Section: Introductionmentioning

confidence: 99%

Simulation of HVDC System Steady and Transient Response by an Analytical Method

Zhao

Zeng

et al. 2020

IEEE Access

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This paper proposes an analytical method for simulation of the steady and transient response of the HVDC system in order to simulate the electromagnetic process of HVDC system in the simulation of hybrid AC/DC system. First, the boundaries of AC and DC systems as well as some assumptions are introduced. Then, the HVDC system is considered as a combination of primary equipment subsystems (PES) and control subsystems (CS). According to the assumptions, the PES can be represented by different homogeneous linear differential equations within different time intervals that are determined by the status of converters. These equations can be solved in analytical method. The CS is expressed by nonlinear differential and algebraic equations and simulated in numerical integration method. The interface parameters of each module are also introduced. The accuracy and efficiency of the proposed model are verified by comparing the simulation results computed by the proposed model with that simulated in PSCAD. INDEX TERMS AC/DC hybrid system simulation, HVDC, electromagnetic transient process, commutation failure.

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Applications of eigenvalues in installation ofmulti‐infeed HVDCsystem for voltage stability

Rehman

Liu

Wei³

et al. 2020

Int Trans Electr Energ Syst

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This research work provides a practical approach to install High Voltage Direct Current (HVDC) link in close vicinity of an existing HVDC system. The work establishes eigenvalue-based approach using modal analysis to give voltage stability conditions for multi-infeed scenario. A detailed analysis of steady state and transient behavior of multi-infeed HVDC system is provided to understand the influence of network impedances. Minimum eigenvalue of AC-DC Jacobian matrix is taken as index to determine stability using a realistic multiinfeed HVDC model. Newton Raphson technique is applied to calculate bus angle and voltage for accurate stability analysis. The inter-converter interaction of multi-infeed HVDC severely affects the performance of AC/DC network. So, it is of great importance to study multi-infeed phenomena with a systematic way to minimize the risk of adverse results. Practical applications of proposed scheme are provided. It has been examined that the behavior of positive eigenvalue largely depends on coupling impedance while impedance between AC busbar and inverters show less control on region of stability. With increase in coupling impedance, multi-infeed interaction factor reduces which reflects less transient over voltage, commutation failure, and stability like problems. Various case studies are provided regarding network impedances to make system voltage stable. The results show that eigenvalues are greatly influenced by associated network impedances. The simulations are performed in MATLAB and PSCAD/EMTDC to verify the analytical results.

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Commutation failure analysis in multi-infeed HVDC systems

Cited by 35 publications

References 0 publications

Variable Extinction Angle Control Strategy Based on Virtual Resistance to Mitigate Commutation Failures in HVDC System

Variable Extinction Angle Control Strategy Based on Virtual Resistance to Mitigate Commutation Failures in HVDC System

Simulation of HVDC System Steady and Transient Response by an Analytical Method

Applications of eigenvalues in installation ofmulti‐infeed HVDCsystem for voltage stability

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