Combined Line Fault Location Method for MMC–HVDC Transmission Systems

Huai, Qing; Qin, Liang; Liu, Kaipei; Ding, Hua; Liao, Xiaobing; Tan, Tingting

doi:10.1109/access.2020.3024674

Cited by 10 publications

(5 citation statements)

References 31 publications

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“…Then, the message is output to the digital input terminal of the tested DC ITTS. The DC ITTS simultaneously measures the analog reference voltage and the digital signal in the input terminal and calculates the relative error with formula (1). The error of the DC ITTS can be calculated with formula (2).…”

Section: Calibration Test Of the DC Ittsmentioning

confidence: 99%

“…With the implementation of the "West-to-East Power Transmission" strategy and the optimal allocation of power grid resources in China, ultra-high-voltage (UHV) DC transmission technology has matured and experienced large-scale applications [1], [2]. A DC instrument transformer is a measurement device for DC voltage and current, and its measurement accuracy affects both the control and implementation of DC transmission systems [3].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wide-Range Digital-Analog Mixed Calibration Technology of a DC Instrument Transformer Test Set

Nie²,

Xiong³

et al. 2021

IEEE Access

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A DC instrument transformer test set (ITTS), as an error measurement device for DC instrument transformers, needs to be calibrated regularly to ensure its accuracy. Existing calibration technology can only achieve DC ITTS error calibrations within a zero analog standard error. This paper proposes a wide-range digital-analog mixed calibration scheme for a DC ITTS based on multistage serial proportional micro-difference technology and high-speed high-precision sampling and coding technology, achieving a digital-analog standard error of ±1% that can be fine-tuned in 0.001% steps. A prototype is developed, and the prototype test results show that the expanded uncertainty of the prototype does not exceed 1×10 -4 , the maximum error of the standard error does not exceed ±3×10 -5 , and the output frequency of the digital protocol message is 4 kHz and 12.8 kHz. This scheme can achieve the error calibration of the analog and digital channels for the DC ITTS within a ±1% standard error and solve the error calibration problem of wide-range digital channels for DC ITTSs.

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Section: Calibration Test Of the DC Ittsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wide-Range Digital-Analog Mixed Calibration Technology of a DC Instrument Transformer Test Set

Nie²,

Xiong³

et al. 2021

IEEE Access

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show abstract

“…Especially, in [2] five types of traveling-wave fault locators are described. The performance of traveling-wave method had been analyzed for applications in real 500kV ac transmission lines [3], distribution systems [4], cable lines [5], and high-voltage dc transmission systems [6,7].…”

Section: Introductionmentioning

confidence: 99%

Identification Method for Pulse Wave Resulted From Fault Transient of Overhead Transmission Line

Liu

Zhou

et al. 2023

IEEE Access

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This paper presents a simple and effective method to extract the identification quantity of transient pulse waveform produced by the overhead transmission line short-circuit fault. This method employs the second-order time harmonic equation of the power frequency component to convert the fault full-wave data. After the conversion, only the identification quantity remains. This method can amplify high-frequency spectral content by the times of the square of the angular frequency, and hence improve the sensitivity of identifying fault transient. Using the identification quantity, one can clearly observe the arrival time and relative intensity of fault transient. A three-phase half wavelength transmission line of 50Hz/3000km is simulated with PSCAD to illuminate the effectiveness of this method. The effects of fault type, soil resistivity, fault resistance, power frequency fluctuation, sampling rate, transposition length,fault inception angle and white noise are analyzed. Calculated results show that this method can distinguish different fault type and can work effectively at low sampling rate down to 10kHz. This method is helpful for improving the performance of the traveling-wave based fault location method.

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“…Accurately locating faults in HVDC systems is crucial for efficient maintenance, ensuring service continuity, and minimizing maintenance time [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. One prominent approach in fault location methods is the traveling wave technique, which involves precisely determining when traveling waves from a faulty point arrive at the line ends by analyzing time differences and wave speeds [16][17][18][19][20][21][22][23][24][25][26]. However, the accuracy of this method can be compromised when dealing with non-homogeneous transmission systems, where multiple specific values of wave speed may be present.…”

Section: Introductionmentioning

confidence: 99%

Protection of HVDC Transmission Systems for Integrating Renewable Energy Resources

Zaky,

Ahmed,

Elsadd

et al. 2023

Eng. Technol. Appl. Sci. Res.

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This paper introduces a fault locator approach designed for non-homogeneous VSC-HVDC (Voltage Source Converter-High Voltage Direct Current) transmission circuits. In various projects, such as those involving offshore wind farms, the transmission circuit's right-of-way can be non-homogeneous, incorporating a mix of underground cables and overhead lines. This diversity in circuit configuration poses issues with fault location approaches. The proposed method involves measuring signals at two sides of the non-homogeneous transmission circuit. Initially, the faulted section is identified using a specific criterion. This criterion calculates the profile of the 1-mode component of the voltage along the transmission circuit, without considering its non-homogeneous nature. This method is founded upon disparities in the voltage change rate between power cables and overhead lines. The provided identification method does not depend on the calculation of fault distances. Subsequently, the faulty point within the selected section is obtained by updating the calculated voltage profile. Notably, our method does not necessitate the installation of additional sensors at junction points. Furthermore, the introduced approach has the capability to locate various fault types, including pole-to-pole and pole-to-ground faults, and it remains effective regardless of the fault resistance value. These investigations were conducted using PSCAD software as a simulation environment, with the proposed method's calculations executed in MATLAB.

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Combined Line Fault Location Method for MMC–HVDC Transmission Systems

Cited by 10 publications

References 31 publications

Wide-Range Digital-Analog Mixed Calibration Technology of a DC Instrument Transformer Test Set

Wide-Range Digital-Analog Mixed Calibration Technology of a DC Instrument Transformer Test Set

Identification Method for Pulse Wave Resulted From Fault Transient of Overhead Transmission Line

Protection of HVDC Transmission Systems for Integrating Renewable Energy Resources

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