Настройки

Укажите год
-

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

Подробнее
-

Мониторинг СМИ

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

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 18. Отображено 18.
06-10-2010 дата публикации

Ammonia synthesis process

Номер: CN0101850988A
Автор: SHENGLIANG BAI, JIANPING GAO, HONGHUI LU, ZHIPING MI, WEILIANG PENG, WENHUI TIAN, YIXIAN WANG, XI YU, MINGMING ZHU, BAI SHENGLIANG, GAO JIANPING, LU HONGHUI, MI ZHIPING, PENG WEILIANG, TIAN WENHUI, WANG YIXIAN, YU XI, ZHU MINGMING
Принадлежит:

The invention belongs to the field of chemical engineering, in particular to an ammonia synthesis process. The process is characterized in that obtained synthesis gases are conveyed to the ammonia synthesis process by ten steps to produce product ammonia. The invention adopts the process technology that crude gas in a coking plant is used as raw material, nitrogen and methane in the crude gas areseparated and purified by utilizing a PSA (Pressure Swing Absorption) device to greatly reduce atmospheric pollutants, such asH2S, NH3 and the like and the emission of CO2. The invention provides a low-cost low-carbon synthetic ammonia production process which can reduce the atmospheric pollutants, such asH2S, NH3 and the like and lessen the emission of CO2.

Подробнее
Номер записи: 1
17-03-2010 дата публикации

Overhead and cable mixed power transmission line fault locating method and device

Номер: CN0101672883A
Автор: WENHUI TIAN, ZHENYU XU, SUJING JIANG, YAN MENG, TIAN WENHUI, XU ZHENYU, JIANG SUJING, MENG YAN
Принадлежит:

The embodiment of the invention discloses an overhead and cable mixed power transmission line fault locating method and device, wherein the method includes the steps of respectively obtaining the positive sequence voltage and the positive sequence current of two endpoints of the mixed power transmission line; calculating the positive sequence voltage and the positive sequence current of the connecting point of the mixed power transmission line used for calculating the fault distance; calculating the first positive sequence voltage and the second positive sequence voltage of the fault point byrespectively adopting the positive sequence voltage and the positive sequence current of two endpoints of a line area, at which the fault point is located, wherein, one end of the area, at which the fault point is located, is the connection point, and the other end thereof is the endpoint of the mixed power transmission line of the fault point in the line area; and then leading the first positivesequence ...

Подробнее
Номер записи: 2
21-01-2009 дата публикации

Fault distance-finding method for nonuniform zero sequence mutual inductance same-lever aerial multi-back line

Номер: CN0101350521A
Автор: ZHENYU XU, WENHUI TIAN, SHAOFENG HUANG, SHENG YU, GANG XU, XU ZHENYU, TIAN WENHUI, HUANG SHAOFENG, YU SHENG, XU GANG
Принадлежит:

The present invention discloses a failure distance-measuring method of uniform and non-uniform zero-sequence mutual inductance and multi-loop circuit with loops of different voltage levels arranged on the same rod or with the same electricity-transmitting corridor. Based on a distributed parameter model, the method samples the voltage and current synchronously at two ends. As for the parallel multi-loop circuit with the loops arranged on the same rod and with the same electricity-transmitting corridor, the influence of mutual inductance of the positive sequence and negative sequence between the loops can be ignored. When the power line has a single-line or over-line failure, the positive-sequence voltage and the negative-sequence voltage, which are respectively calculated from two sides of the fault point, should be equal to the sum of the positive-sequence voltage and the negative-sequence voltage, so as to solve the fault distance equation based on the positive-sequence component, negative-sequence ...

Подробнее
Номер записи: 3
17-12-2008 дата публикации

Method for implementing element for measuring distance between phases without relevance to load current and ground resistance

Номер: CN0101325331A
Автор: QIXUN YANG, ZHENYU XU, ZHONGLI ZHANG, YUEPIN ZHANG, WENHUI TIAN, YANG QIXUN, XU ZHENYU, ZHANG ZHONGLI, ZHANG YUEPIN, TIAN WENHUI
Принадлежит:

The invention discloses an implement method of an element for measuring a phase distance unrelated to the loading current and the fault resistance. When a high-voltage/ ultra-high-voltage/extra-high-voltage has a phase fault, the current in a relay location is IPhiPhi, and the voltage is UPhiPhi; the distance from the fault point to the relay location is x; the voltage at the fault point is UPhiPhif, and the current is IPhiPhif; and the break current DeltaIPhiPhi in the relay location is measured. Since the fault is phase-to-phase, UPhiPhif has the same phase asss IPhiPhif; and since DeltaIPhiPhi has the same phase angle as IPhiPhif, UPhiPhif has the same phase angle as DeltaIPhiPhi, wherein UPhiPhif is equal to UPhiPhiPhi minus xZ1IPhiPhi, DeltaIPhiPhi and UPhiPhif are changed into plural forms; since DeltaIPhiPhi and UPhiPhif have the same phase angle, the ratio of the imaginary part to the real part of DeltaIPhiPhi is equal to the ratio of the imaginary part to the real part of UPhiPhif ...

Подробнее
Номер записи: 4
21-07-2010 дата публикации

Method for implementing earthing distance measurement element based on negative sequence fault current component

Номер: CN0101325329B
Автор: TIAN WENHUI, XU ZHENYU, ZHANG ZHONGLI, ZHANG YUEPIN, YANG QIXUN, WENHUI TIAN, ZHENYU XU, ZHONGLI ZHANG, YUEPIN ZHANG, QIXUN YANG
Принадлежит:

The invention discloses an implement method of an element for measuring a grounding distance unrelated to the loading current and the grounding resistance, which is based on a negative sequence fault current component. When a high-voltage/ ultra-high-voltage/extra-high-voltage has a single-phase grounding fault, the current in a relay location is IPhi, and the voltage is UPhi; the distance from the fault point to the relay location is x; the voltage at the fault point is UPhif; the grounding current is IPhif; and the break current IPhi2 of negative sequence in the relay location is measured. Since the grounding is ohmic, IPhif is in the same phase with IPhif; as for the single-phase grounding fault, since IPhi2 has the same phase angle with IPhif, UPhif has the same phase angle as IPhi2, so as to calculate and obtain a formula of the distance from the fault point to the relay location; since the formula is unrelated to the loading current and the grounding resistance, as a distance protective ...

Подробнее
Номер записи: 5
09-06-2010 дата публикации

Method for implementing element for measuring earthing distance without relevance to load current and ground resistance

Номер: CN0101325332B
Автор: XU ZHENYU, ZHANG ZHONGLI, ZHANG YUEPIN, TIAN WENHUI, YANG QIXUN, ZHENYU XU, ZHONGLI ZHANG, YUEPIN ZHANG, WENHUI TIAN, QIXUN YANG
Принадлежит:

The invention discloses an implement method of an element for measuring a grounding distance unrelated to the loading current and the grounding resistance. When a high-voltage/ ultra-high-voltage/extra-high-voltage has a grounding fault, the current IPhi, the voltage UPhi and the break current DeltaIPhi in a relay location are measured; the distance from the fault point to the relay location is x;the voltage at the fault point is Uf; the grounding current is If; and the break current DeltaIPhi in the relay location is measured. Since the grounding is ohmic, the voltage Uf at the fault point is in the same phase as the grounding current If; and since the break current DeltaIPhi has the same phase angle as the grounding current If, the voltage Uf at the fault point has the same phase angleas the break current DeltaIPhi, wherein Uf is equal to UPhi minus xZ1 (IPhi plus 3kI0), DeltaIPhi and Uf are changed into plural forms; since DeltaIPhi and Uf have the same phase angle, the ratio of the ...

Подробнее
Номер записи: 6
06-01-2010 дата публикации

Data sharing type area protection system based on IEC 61850

Номер: CN0101621216A
Автор: MIN CAI, HUBING ZHOU, YANFENG ZHAO, YOUHUAI WANG, ZENGLI YANG, WENHUI TIAN, CAI MIN, ZHOU HUBING, ZHAO YANFENG, WANG YOUHUAI, YANG ZENGLI, TIAN WENHUI
Принадлежит:

The invention discloses a data sharing type area protection system based on IEC 61850, which is based on a high-speed data communication network, a plurality of lines which are closely interrelated are considered to be used as one area, intelligent protection devices inside the area are mutually connected through optical fibers, GPS synchronous data are adopted, and the information is shared, therefore, the novel protection system is established. The protection system utilizes a plurality of points to share synchronous information, is capable of accurately judging a position of fault when the protection system is broken down, has the absolute selectivity of protection action during normal communication and can select a protection unit needed to be used as reserve protection action according to a topological structure and a fault wire position of a protected electric system when main protection is rejected or a circuit breaker does not work. Compared with the traditional reserve protection ...

Подробнее
Номер записи: 7
17-12-2008 дата публикации

Method for implementing earthing distance measurement element

Номер: CN0101325330A
Автор: QIXUN YANG, ZHENYU XU, ZHONGLI ZHANG, YUEPIN ZHANG, WENHUI TIAN, YANG QIXUN, XU ZHENYU, ZHANG ZHONGLI, ZHANG YUEPIN, TIAN WENHUI
Принадлежит:

The invention discloses a high-accuracy implement method of an element for measuring a grounding distance unrelated to the loading current and the grounding resistance. When a high-voltage/ ultra-high-voltage/extra-high-voltage has a single-phase grounding fault, the current in a relay location is IPhi, and the voltage is UPhi; the distance from the fault point to the relay location is x; the voltage at the fault point is UPhif; the grounding current is IPhif; and the break current DeltaIPhin of positive sequence and negative sequence in the relay location is measured. Since the grounding is ohmic, UPhif is in the same phase with IPhif; and since DeltaIPhin has the same phase angle as IPhif, UPhif has the same phase angle as the DeltaIPhin, thereby further obtaining a fault distance formula which is unrelated to the loading current and the grounding resistance, wherein Phi is equal to a, b or c, and n is equal to 1 or 2. Since the formula itself is unrelated to the loading current and the ...

Подробнее
Номер записи: 8
10-03-2010 дата публикации

Fault location method based on travelling wave

Номер: CN0101666848A
Автор: LEI REN, ZHENYU XU, ZHAOQIANG DU, WENHUI TIAN, REN LEI, XU ZHENYU, DU ZHAOQIANG, TIAN WENHUI
Принадлежит:

The invention discloses a fault location method based on a travelling wave when the signal/noise ratio is at a lower level. Because of the strengthening of capacitance effects of a high-voltage powertransmission line, the travelling wave decays comparatively large when is transmitted along the line, in particular when high resistance fault or low voltage inception angle ground fault occurs, the initial energy of the travelling wave is very low, and the energy is comparatively low after line capacitance decaying, and is mainly overwhelmed by noise. Therefore, as far as the present used travelling wave method is concerned, if a sampled signal is not preprocessed, wavelets transformation is directly used for carrying out fault location, but correct result can't be obtained. In the fault location method, a moving average filter is firstly used to preprocess the sampled signal, and then Bspline wavelet transformation is used to realize fault location. Because the moving average filter can effectively ...

Подробнее
Номер записи: 9
06-04-2011 дата публикации

Method for implementing earthing distance measurement element

Номер: CN0101325330B
Автор: ZHANG YUEPIN, ZHANG ZHONGLI, YANG QIXUN, TIAN WENHUI, XU ZHENYU, YUEPIN ZHANG, ZHONGLI ZHANG, QIXUN YANG, WENHUI TIAN, ZHENYU XU
Принадлежит:

The invention discloses a high-accuracy implement method of an element for measuring a grounding distance unrelated to the loading current and the grounding resistance. When a high-voltage/ ultra-high-voltage/extra-high-voltage has a single-phase grounding fault, the current in a relay location is IPhi, and the voltage is UPhi; the distance from the fault point to the relay location is x; the voltage at the fault point is UPhif; the grounding current is IPhif; and the break current DeltaIPhin of positive sequence and negative sequence in the relay location is measured. Since the grounding is ohmic, UPhif is in the same phase with IPhif; and since DeltaIPhin has the same phase angle as IPhif, UPhif has the same phase angle as the DeltaIPhin, thereby further obtaining a fault distance formula which is unrelated to the loading current and the grounding resistance, wherein Phi is equal to a, b or c, and n is equal to 1 or 2. Since the formula itself is unrelated to the loading current and the ...

Подробнее
Номер записи: 10
06-04-2011 дата публикации

Method for implementing element for measuring distance between phases without relevance to load current and ground resistance

Номер: CN0101325331B
Автор: ZHANG ZHONGLI, ZHANG YUEPIN, TIAN WENHUI, XU ZHENYU, YANG QIXUN, ZHONGLI ZHANG, YUEPIN ZHANG, WENHUI TIAN, ZHENYU XU, QIXUN YANG
Принадлежит:

The invention discloses an implement method of an element for measuring a phase distance unrelated to the loading current and the fault resistance. When a high-voltage/ ultra-high-voltage/extra-high-voltage has a phase fault, the current in a relay location is IPhiPhi, and the voltage is UPhiPhi; the distance from the fault point to the relay location is x; the voltage at the fault point is UPhiPhif, and the current is IPhiPhif; and the break current DeltaIPhiPhi in the relay location is measured. Since the fault is phase-to-phase, UPhiPhif has the same phase as IPhiPhif; and since DeltaIPhiPhi has the same phase angle as IPhiPhif, UPhiPhif has the same phase angle as DeltaIPhiPhi, wherein UPhiPhif is equal to UPhiPhiPhi minus xZ1IPhiPhi, DeltaIPhiPhi and UPhiPhif are changed into plural forms; since DeltaIPhiPhi and UPhiPhif have the same phase angle, the ratio of the imaginary part to the real part of DeltaIPhiPhi is equal to the ratio of the imaginary part to the real part of UPhiPhif ...

Подробнее
Номер записи: 11
18-04-2012 дата публикации

Protection system for area electric network data sharing

Номер: CN0101621217B
Автор: CAI MIN, WANG YOUHUAI, ZHOU HUBING, ZHAO YANFENG, YIN JIANGANG, TIAN WENHUI, MIN CAI, YOUHUAI WANG, HUBING ZHOU, YANFENG ZHAO, JIANGANG YIN, WENHUI TIAN
Принадлежит:

The invention discloses a protection system for area data sharing, which is based on a high-speed data communication network, a plurality of lines which are closely interrelated are considered to be used as one area, protection devices inside the area are mutually connected through optical fibers, and the information is shared, therefore, the novel protection system is established. The protectionsystem utilizes a plurality of points to share synchronous information, is capable of accurately judging a position of fault when the protection system is broken down, has the absolute selectivity ofprotection action during normal communication and can select a protection unit needed to be used as reserve protection action according to a topological structure and a fault wire position of a protected electric system when main protection is rejected or a circuit breaker does not work. Compared with the traditional reserve protection action, the intelligent reserve protection action of the areahas ...

Подробнее
Номер записи: 12
17-12-2008 дата публикации

Method for implementing earthing distance measurement element based on negative sequence fault current component

Номер: CN0101325329A
Автор: QIXUN YANG, ZHENYU XU, ZHONGLI ZHANG, YUEPIN ZHANG, WENHUI TIAN, YANG QIXUN, XU ZHENYU, ZHANG ZHONGLI, ZHANG YUEPIN, TIAN WENHUI
Принадлежит:

The invention discloses an implement method of an element for measuring a grounding distance unrelated to the loading current and the grounding resistance, which is based on a negative sequence fault current component. When a high-voltage/ ultra-high-voltage/extra-high-voltage has a single-phase grounding fault, the current in a relay location is IPhi, and the voltage is UPhi; the distance from the fault point to the relay location is x; the voltage at the fault point is UPhif; the grounding current is IPhif; and the break current IPhi2 of negative sequence in the relay location is measured. Since the grounding is ohmic, IPhif is in the same phase with IPhif; as for the single-phase grounding fault, since IPhi2 has the same phase angle with IPhif, UPhif has the same phase angle as IPhi2, so as to calculate and obtain a formula of the distance from the fault point to the relay location; since the formula is unrelated to the loading current and the grounding resistance, as a distance protective ...

Подробнее
Номер записи: 13
17-12-2008 дата публикации

Method for implementing element for measuring earthing distance without relevance to load current and ground resistance

Номер: CN0101325332A
Автор: QIXUN YANG, ZHENYU XU, ZHONGLI ZHANG, YUEPIN ZHANG, WENHUI TIAN, YANG QIXUN, XU ZHENYU, ZHANG ZHONGLI, ZHANG YUEPIN, TIAN WENHUI
Принадлежит:

The invention discloses an implement method of an element for measuring a grounding distance unrelated to the loading current and the grounding resistance. When a high-voltage/ ultra-high-voltage/extra-high-voltage has a grounding fault, the current IPhi, the voltage UPhi and the break current DeltaIPhi in a relay location are measured; the distance from the fault point to the relay location is x; the voltage at the fault point is Uf; the grounding current is If; and the break current DeltaIPhi in the relay location is measured. Since the grounding is ohmic, the voltage Uf at the fault point is in the same phase as the grounding current If; and since the break current DeltaIPhi has the same phase angle as the grounding current If, the voltage Uf at the fault point has the same phase angle as the break current DeltaIPhi, wherein Uf is equal to UPhi minus xZ1 (IPhi plus 3kI0), DeltaIPhi and Uf are changed into plural forms; since DeltaIPhi and Uf have the same phase angle, the ratio of the ...

Подробнее
Номер записи: 14
06-04-2011 дата публикации

Fault location method based on travelling wave

Номер: CN0101666848B
Автор: REN LEI, XU ZHENYU, DU ZHAOQIANG, TIAN WENHUI, LEI REN, ZHENYU XU, ZHAOQIANG DU, WENHUI TIAN
Принадлежит:

The invention discloses a fault location method based on a travelling wave when the signal/noise ratio is at a lower level. Because of the strengthening of capacitance effects of a high-voltage power transmission line, the travelling wave decays comparatively large when is transmitted along the line, in particular when high resistance fault or low voltage inception angle ground fault occurs, the initial energy of the travelling wave is very low, and the energy is comparatively low after line capacitance decaying, and is mainly overwhelmed by noise. Therefore, as far as the present used travelling wave method is concerned, if a sampled signal is not preprocessed, wavelets transformation is directly used for carrying out fault location, but correct result can't be obtained. In the fault location method, a moving average filter is firstly used to preprocess the sampled signal, and then Bspline wavelet transformation is used to realize fault location. Because the moving average filter can effectively ...

Подробнее
Номер записи: 15
06-01-2010 дата публикации

Protection system for area electric network data sharing

Номер: CN0101621217A
Автор: MIN CAI, YOUHUAI WANG, HUBING ZHOU, YANFENG ZHAO, JIANGANG YIN, WENHUI TIAN, CAI MIN, WANG YOUHUAI, ZHOU HUBING, ZHAO YANFENG, YIN JIANGANG, TIAN WENHUI
Принадлежит:

The invention discloses a protection system for area data sharing, which is based on a high-speed data communication network, a plurality of lines which are closely interrelated are considered to be used as one area, protection devices inside the area are mutually connected through optical fibers, and the information is shared, therefore, the novel protection system is established. The protection system utilizes a plurality of points to share synchronous information, is capable of accurately judging a position of fault when the protection system is broken down, has the absolute selectivity of protection action during normal communication and can select a protection unit needed to be used as reserve protection action according to a topological structure and a fault wire position of a protected electric system when main protection is rejected or a circuit breaker does not work. Compared with the traditional reserve protection action, the intelligent reserve protection action of the area has ...

Подробнее
Номер записи: 16
17-08-2011 дата публикации

Intersecting line digital cutting programming method for round pipe with unequal wall thickness

Номер: CN0102156444A
Автор: HU JIANG, TIAN WENHUI, YANG LIPING, ZHANG XI, HAN BIAO, JIANG HU, WENHUI TIAN, LIPING YANG, XI ZHANG, BIAO HAN
Принадлежит:

The invention relates to an intersecting line digital cutting programming method for a round pipe with unequal wall thickness. The intersecting line digital cutting programming method is characterized by comprising the steps of a. lofting a pipe to be cut according to the model, programming the cutting program of the pipe at one end and determining the farthest cutting point; b. determining the groove angle at the farthest cutting point; c. taking the internal diameter as a benchmark side, and working out the length difference of the internal diameter and the external diameter after making the groove; d. programming the cutting program at the other cutting end and determining the farthest cutting point; e. determining the length difference of the internal diameter and the external diameter of the other end in the same style; f. calculating the cutting arc start point of the other end according to cutting start distance existing in the program. The intersecting line digital cutting programming ...

Подробнее
Номер записи: 17
16-02-2011 дата публикации

Data sharing type area protection system based on IEC 61850

Номер: CN0101621216B
Автор: MIN CAI, HUBING ZHOU, YANFENG ZHAO, YOUHUAI WANG, ZENGLI YANG, WENHUI TIAN, CAI MIN, ZHOU HUBING, ZHAO YANFENG, WANG YOUHUAI, YANG ZENGLI, TIAN WENHUI
Принадлежит:

The invention discloses a data sharing type area protection system based on IEC 61850, which is based on a high-speed data communication network, a plurality of lines which are closely interrelated are considered to be used as one area, intelligent protection devices inside the area are mutually connected through optical fibers, GPS synchronous data are adopted, and the information is shared, therefore, the novel protection system is established. The protection system utilizes a plurality of points to share synchronous information, is capable of accurately judging a position of fault when theprotection system is broken down, has the absolute selectivity of protection action during normal communication and can select a protection unit needed to be used as reserve protection action according to a topological structure and a fault wire position of a protected electric system when main protection is rejected or a circuit breaker does not work. Compared with the traditional reserve protection ...

Подробнее
Номер записи: 18