Review on topology‐based dc short‐circuit fault ride‐through strategies for MMC‐based HVDC system

Wan, Yihao; Mao, Mingxuan; Zhou, Lin; Xi, Xinze; Xie, Bin; Zhou, Siyu

doi:10.1049/iet-pel.2019.0607

Cited by 24 publications

(10 citation statements)

References 106 publications

(196 reference statements)

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“…However, they generally have problems in identifying nonstationary time-varying signals and abrupt signals caused by nonlinear faults, which are difficult or even misidentified. As a result, fires, electrical breakdowns, personal accidents, burnout of switchgear, and damage to other devices are caused [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Singular Signal Measurement Based on Bidirectional Recursive Complex-Valued Wavelet Algorithm

Xie

Huang

2022

Security and Communication Networks

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The normal operation fault of the power system is usually caused by a short-circuit fault. At this time, the system changes drastically from one state to another, accompanied by complex transient phenomena. Therefore, the measured signal contains a large number of transient components. How to effectively analyze such signals, extract their characteristics, and develop new protection devices has always been an important research field in power system protection technology. The protection of the power system is to achieve the purpose of correct action and elimination of faults by quickly detecting and locating faults. At present, the power signal analysis tools used in microcomputer protection include FFT, Kalman filter, and finite impulse response filter. They are efficient for the analysis of stationary signals, but have their limitations in analyzing nonstationary signals; especially it is difficult to identify nonlinear faults, such as the detection of high-impedance nonlinear short-circuit faults, which is a long-term unsolved problem in power systems. Based on wavelet transform, this paper selects complex-valued wavelet algorithm, analyzes a real-time recursive wavelet algorithm, and deduces the realization process of the algorithm in detail. The algorithm greatly reduces the computational complexity of the existing two-way recursive algorithm, can be used for real-time detection of fault signals in various fields of power system, and can be extended to realize other fast recursive algorithms of wavelet functions. Based on the sensitivity of complex-valued wavelet transform phase information to singularity, a method for real-time monitoring of power system fault mutation signals using the phase information of complex-valued wavelet fast recursion algorithm to assist amplitude information is proposed. The validity and practicability of this complex-valued wavelet and its real-time recursive algorithm for fault detection are demonstrated by an example.

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Section: Introductionmentioning

confidence: 99%

Singular Signal Measurement Based on Bidirectional Recursive Complex-Valued Wavelet Algorithm

Xie

Huang

2022

Security and Communication Networks

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“…Studying the transient process after DC short-circuit fault is crucial to suppress fault current. As the most representative topologies which are capable of fault self-clearing, the fullbridge sub-module (FBSM) and the clamp double sub-module (CDSM) need a considerable quantity of insulated gate bipolar transistors (IGBT) [6,7]. Furthermore, enhanced reverse sub-module, double reverse blocking sub-module and parallel multiple sub-module are used to control capacitor charge and discharge to suppress fault current [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Novel adaptive reclosing scheme of MMC‐HVDC transmission lines based on phase synchronization compensation control

Zhang

Cui³

et al. 2022

IET Generation Trans & Dist

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Modular multilevel converter based on high voltage director current is important for large‐scale power regional interconnection. Adaptive reclosing is critical to improving the safety and economy of power transmission. The time‐frequency characteristics during fault clearance are analysed by Hilbert transform to suppress over‐voltage or over‐current resulting from short‐circuit fault. A phase synchronization compensation control algorithm is designed based on voltage and current through the virtual network. The rapid suppression of fault overvoltage is achieved by synchronously switching network attributes. Furthermore, the line recovery voltage is introduced into the fault property identification. The proposed adaptive reclosing scheme with high‐speed dynamics can raise the comprehensive benefits of the power system. Studies have verified that phase synchronization compensation control can effectively reduce the impact of oscillation. Moreover, permanent and transient faults can be quickly and reliably discriminated during de‐ionization by multi‐device coordination, which is earlier than the traditional adaptive reclosing scheme. It provides a basis for the fault recovery optimization strategy coordinating with multiple equipment.

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“…In the event of DC short circuit faults on an MMC-based DC distribution system, the above-mentioned strategies have shortcomings i.e. the traditional AC circuit breakers are slow in response, and during its operation, the free-wheeling diodes of MMC need to be rated for full prospective short circuit current [24]. Moreover, it requires a long time to recover the system, and no active and reactive power is exchanged [25].…”

Section: Introductionmentioning

confidence: 99%

Control Design and Fault Handling Performance of MMC for MMC-Based DC Distribution System

et al. 2022

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Modular multilevel converters (MMCs) have emerged as a viable choice in future DC grid architectures due to their scalability to meet voltage level requirements. However, MMC-based DC distribution systems are at risk of short-term outages during the faults in either the DC or AC networks feeding the MMC, so it remains a challenge to accomplish AC and DC fault ride-through (FRT) capability in such applications. To ensure stable operations of the DC terminals, FRT strategies are required for the faults on both the AC and DC sides of the converter. This paper proposes a FRT strategy for the AC and DC side of the converter to ensure stable and economically viable operation of the DC distribution network. The asymmetrical faults in the upstream AC grids are managed by using the integrated energy of the MMC. Whereas, the DC FRT capability of the MMC is accomplished by changing the redundant submodules of the MMC to full-bridge submodules (FBSMs), thus allowing a DC FRT to be achieved by using DC circuit breakers that are low cost and reduced in size. Applying the proposed DC FRT strategy, which makes possible the use of low-cost and reduced in size DC circuit breakers in DC distribution, results in a reduction in the overall initial investments.INDEX TERMS Modular multilevel converter, DC FRT, Asymmetrical fault in AC grid, DC faults.

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Review on topology‐based dc short‐circuit fault ride‐through strategies for MMC‐based HVDC system

Cited by 24 publications

References 106 publications

Singular Signal Measurement Based on Bidirectional Recursive Complex-Valued Wavelet Algorithm

Singular Signal Measurement Based on Bidirectional Recursive Complex-Valued Wavelet Algorithm

Novel adaptive reclosing scheme of MMC‐HVDC transmission lines based on phase synchronization compensation control

Control Design and Fault Handling Performance of MMC for MMC-Based DC Distribution System

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