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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 5. Отображено 5.
02-05-2023 дата публикации

Transformer noise reduction system based on direct current magnetic bias suppression

Номер: CN116053010A
Автор: LI MIN, GAO XIN, ZHAO WENLIANG, DIAO CHENGWU, REN YAN, YAO WEI, HAN WEI, WEI RONG, GE LINGYUAN
Принадлежит:

The invention relates to a transformer noise reduction system based on DC magnetic bias suppression, and the system comprises a three-phase current signal collection module which obtains a three-phase current signal of a transformer power system; the signal processing and control module is used for carrying out vector addition on the three-phase current signal to obtain a direct-current magnetic bias current signal; the direct current compensation generation module generates corresponding reverse direct current according to the direct current magnetic bias current signal, and the influence of direct current magnetic bias on the transformer is counteracted through the reverse direct current; and the harmonic compensation generation module injects a three-phase current signal into the transformer according to the direct-current magnetic bias current signal so as to suppress the harmonic component of the transformer. Transformer signals without harmonic components and direct-current magnetic ...

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Номер записи: 1
25-07-2023 дата публикации

Converter transformer fault diagnosis method and device based on grey correlation method

Номер: CN116482578A
Автор: ZHOU XIU, TIAN TIAN, LUO YAN, BAI JIN, ZHU LIN, LI XIUGUANG, HE NINGHUI, PAN LIANGLIANG, NI HUI, CHEN LEI, WEI YING, SUN SHANGPENG, XU YUHUA, ZHANG HENG, CHAI YI, ZHAO WENLIANG, DIAO CHENGWU
Принадлежит:

The invention discloses a converter transformer fault diagnosis method and device based on a grey correlation method, and the method comprises the steps: obtaining historical chromatographic data, and collecting converter transformer oil; performing gas chromatographic analysis on the converter transformer oil to obtain current chromatographic data; and based on the historical chromatographic data and the current chromatographic data, adopting a grey correlation method to obtain grey correlation degrees, and sorting the grey correlation degrees to obtain the fault type of the converter transformer. The converter transformer fault diagnosis device comprises a CPU, a miniature bridge detector, a man-machine interface, a gas source system, a gas circuit control system and a lithium battery. According to the invention, the fault point can be found quickly, so that the converter transformer is protected to operate under the safe working margin, and the insulating property and the service life ...

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Номер записи: 2
23-06-2023 дата публикации

Novel converter transformer electromagnetic shielding structure and local overheating solving method

Номер: CN116313444A
Автор: ZHOU XIU, LUO YAN, TIAN TIAN, BAI JIN, XIANG ZHONGHUA, ZHU LIN, LI XIUGUANG, HE NINGHUI, WANG BO, MA KUI, LIU BO, YU JIAYING, ZHANG HENG, ZHAO WENLIANG, DIAO CHENGWU
Принадлежит:

The novel electromagnetic shielding structure comprises an oil tank, an iron core is arranged in the oil tank, a winding mechanism is arranged in the iron core, the winding mechanism comprises a voltage regulating winding arranged in the iron core, low-voltage windings are symmetrically arranged in the voltage regulating winding, and high-voltage windings are arranged on the two sides of the low-voltage windings respectively. The bottom of the voltage regulating winding is provided with a novel electromagnetic shield. According to the invention, leakage magnetic fields of different frequency bands can be effectively controlled, so that the leakage magnetic field generated by the iron core effectively enters novel electromagnetic shielding, the loss of an oil tank of the converter transformer is reduced, the operation efficiency of the converter transformer is improved, and a local overheating fault is prevented.

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Номер записи: 3
08-08-2023 дата публикации

High-frequency transformer loss decomposition method and device based on different excitation

Номер: CN116559543A
Автор: ZHAO WENLIANG, DING HAIBO, DOU MINGLEI, DIAO CHENGWU
Принадлежит:

The invention belongs to the technical field of transformers, and particularly relates to a high-frequency transformer loss decomposition method and device based on different excitations, and the method comprises the steps: obtaining the loss type of a high-frequency transformer; introducing an eddy current loss correction coefficient and a residual loss correction coefficient under asymmetric voltage excitation, and calculating the iron core loss of the high-frequency transformer according to the obtained loss type of the high-frequency transformer; calculating an eddy current loss correction coefficient and a residual loss correction coefficient under the excitation of the asymmetric voltage at any conduction time ratio by considering the change of the magnetic induction intensity under the excitation of the asymmetric voltage at any conduction time ratio, and combining the obtained iron core loss and loss type of the high-frequency transformer; and decomposition calculation of the loss ...

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Номер записи: 4
25-04-2023 дата публикации

Transformer life estimation method and system

Номер: CN116011171A
Автор: LI MIN, GAO XIN, ZHAO WENLIANG, DIAO CHENGWU, ZHU GEFEI, YAO WEI, HAN WEI, WEI RONG, GE LINGYUAN
Принадлежит:

The invention relates to a transformer life estimation method and system. The method comprises the following steps: acquiring a temperature sample data set and a current sample data set by using a temperature sensor and a current sensor; constructing a probability prediction model, and calculating to obtain the predicted top oil temperature of the transformer; the predicted top oil temperature of the transformer is corrected through the difference value, and the corrected predicted top oil temperature is obtained; associating the corrected top oil temperature prediction result with a test degradation equation through Bayesian filtering to construct a probabilistic life model, substituting the oil temperature signal curve into the probabilistic life model, and calculating to obtain a posterior probability of a transformer life state variable; and according to the posterior probability of the transformer life state variable and the transformer insulation initial life, predicting and obtaining ...

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Номер записи: 5