A Method for the Indirect Detection of Audible Noise From High-Voltage Direct Current Transmission Lines

Liu, Yingyi; Xv, Jiahuan; Liu, Yuanqing; Yuan, Haiwen; Cui, Yong

doi:10.1109/tim.2019.2942251

Cited by 15 publications

(4 citation statements)

References 18 publications

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“…The audible noise prediction method suitable for multi‐bundle and large cross‐section UHVDC lines was proposed based on the experimental research of >20 kinds of bundled conductors in corona cages and experimental verification of full‐scale bundled‐conductors on test lines [40, 41]. Under the constraint of audible noise and radio interference limits, the cross‐section of subconductors, split type, and pole–pole spacing were determined and optimised [42, 43], as shown in Table 14.…”

Section: Key Technologies Of Uhvdc Transmissionmentioning

confidence: 99%

Research and application of UHV power transmission in China

2018

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The power demand increases rapidly in China; however, the areas of huge power demands are of long distance from most areas of abundant energy resource in the country. Therefore, China put in great effort to develop ultrahigh voltage (UHV) power transmission systems to optimise its energy allocation. This includes (i) systematically developing key technologies such as overvoltage suppression, external insulation design, and electromagnetic environment control, and (ii) developing key equipment such as UHV alternative current (UHVAC) transformers, circuit breakers, and series compensated equipment, and UHV direct current (UHVDC) converter transformers, smoothing reactors, converter valves, and DC transmission control and protection systems. Eight AC UHV projects and 11 DC UHV projects have been built in China, which play an important role in the optimal allocation of energy. Plus there are one more UHVAC and three more UHVDC transmission projects in construction, while UHVAC gas-insulated lines will be applied in the UHVAC line crossover the Yangtze River and the ±1100 kV UHVDC power transmission technology is in development. Here, the development and application of UHV power transmission technologies in China are described, some main challenges the UHV projects encountered are discussed, and experiences obtained from the operation of UHV systems are introduced. It is concluded that China obtained mature experience in developing, constructing, and operating UHV systems and successfully realised long-distance, large-capacity power transmission, and the UHV power transmission technology has become an important measure for energy allocation in large areas.

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Section: Key Technologies Of Uhvdc Transmissionmentioning

confidence: 99%

Research and application of UHV power transmission in China

2018

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“…Therefore, transformer DC bias can be understood in time by monitoring the neutral DC, vibration and noise of the transformer [6,7]. However, in the process of synchronous monitoring of transformer DC bias, the synchronous monitoring system is prone to communication failure, electromagnetic interference and other environmental effects [8][9][10], which can lead to abnormal data for the synchronous monitoring of transformer DC bias. Abnormal data in synchronous monitoring of transformer DC bias adversely affect the analysis of transformer DC bias.…”

Section: Introductionmentioning

confidence: 99%

Identification of Abnormal Data for Synchronous Monitoring of Transformer DC Bias Based on Multiple Criteria

Kou,

Lin,

Wang

et al. 2023

Sensors

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Seriously abnormal data exist in the synchronous monitoring data of transformer DC bias, which causes serious data feature contamination and even affects the identification of transformer DC bias. For this reason, this paper aims to ensure the reliability and validity of synchronous monitoring data. This paper proposes an identification of abnormal data for the synchronous monitoring of transformer DC bias based on multiple criteria. By analyzing the abnormal data of different types, the characteristics of abnormal data are obtained. Based on this, the abnormal data identification indexes are introduced, including gradient, sliding kurtosis and Pearson correlation coefficient. Firstly, the Pauta criterion is used to determine the threshold of the gradient index. Then, gradient is used to identify the suspected abnormal data. Finally, the sliding kurtosis and Pearson correlation coefficient are used to identify the abnormal data. Data for synchronous monitoring of transformer DC bias in a certain power grid are used to verify the proposed method. The results show that the accuracy of the proposed method in identifying mutated abnormal data and zero-value abnormal data is claimed to be 100%. Compared with traditional abnormal data identification methods, the accuracy of the proposed method is significantly improved.

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“…But in these outdoor measurements, background noise will be mixed with corona audible noise and it is difficult to filter out. Meanwhile, due to the reflection of ground, buildings and trees, audible noise will produce a considerable degree of distortion [7][8][9]. In order to eliminate the background noise, an anechoic room with sound insulation materials is designed to isolate the audible noise from the background noise and suppress sound reflection [10].…”

Section: Introductionmentioning

confidence: 99%

Research on the Detection Technology of Audible Noise Sources of UHVDC Transmission Lines

Zhao

Yuan

et al. 2022

J. Phys.: Conf. Ser.

Self Cite

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In order to directly and deeply study the law and characteristics of audible noise sources of UHVDC transmission lines, a method of detecting the sound intensity vector at the source position in the bundle conductor is proposed. First, the structure of the sound intensity detection device is designed, and the method for calculating the sound intensity vector is deduced based on this prototype. Then, the simulation of the electric field distribution on the surface of the device in the UHV extreme electric field environment is carried out. The change of the maximum electric field intensity and the influencing factors are obtained, which proves that the proposed detection device has the adaptability of the UHV electric field environment. Finally, the measurement error of the proposed detection device is analyzed. The results show that in the frequency range of 100∼5000Hz, the theoretical error of the sound intensity vector components and the total sound intensity level obtained by the measurement device in three directions are less than 2dB, which can meet requirements of sound intensity detection at the sound source.

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A Method for the Indirect Detection of Audible Noise From High-Voltage Direct Current Transmission Lines

Cited by 15 publications

References 18 publications

Research and application of UHV power transmission in China

Research and application of UHV power transmission in China

Identification of Abnormal Data for Synchronous Monitoring of Transformer DC Bias Based on Multiple Criteria

Research on the Detection Technology of Audible Noise Sources of UHVDC Transmission Lines

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