Abstract:
Embodiments of the present disclosure relate to a wireless measuring device and a cable bushing comprising the same. The wireless measuring device comprises a non-metal package adapted to be arranged inside a cable bushing; and a temperature measuring element arranged inside the non-metal package and being capable of wirelessly communicating with a wireless transmitter arranged outside the cable bushing, the temperature measuring element being configured to detect a temperature inside the cable bushing in response to receiving a measuring signal from the wireless transmitter, and transmit the detected temperature to the wireless transmitter.
Abstract:
Methods, apparatuses, systems, computer readable media and a computer product for detecting a gas leak of a gas tank. In a method, at least one inside temperature is determined for the gas tank based on a plurality of outside temperatures that are collected outside the gas tank, the at least one inside temperature being estimated for at least one inside position within the gas tank during an operation of the gas tank (310). A gas pressure within the gas tank under a standard temperature is obtained based on the at least one inside temperature (320). The gas leak of the gas tank is detected based on the gas pressure (330). An inside temperature of the gas tank is determined and used for detecting the gas tank, therefore the gas leak may be detected in a more accurate and effective way.
Abstract:
According to implementations of the subject matter described herein, there is provided a method, an electronic device and computer readable storage medium for monitoring gas pressure. The method comprises: determining a first reference measurement from a set of historical measurements of gas pressure inside a hermetic container; in response to a determination that a current gas pressure measurement is below the first reference measurement by a first threshold, determining a first variation trend of a gas leaking velocity of the hermetic container; and determining, based on the first variation trend, an expected time duration for the gas pressure to reduce from the current gas pressure measurement to a threshold pressure. Information about when the gas pressure will drop to the threshold pressure can be provided.
Abstract:
Embodiments of the present disclosure provide a method and an apparatus for training a model for predicting a temperature rise of a heating element in a switchgear. The method comprises obtaining a model for predicting the temperature rise, the model comprising a plurality of inputs, an output, and several parameters to be determined; obtaining n+1 sets of physical quantities in relation to the heating element, each set of physical quantities being collected at a corresponding one of n+1 time points spaced apart from each other by a time step in a normal operation state of the heating element, each set of physical quantities comprising a current and an actual temperature of the heating element and an ambient temperature; converting the actual temperature in each set of physical quantities into an actual temperature rise based on the corresponding ambient temperature; and training the model with the current, the actual temperature rise and the ambient temperature to determine the several parameters.
Abstract:
A gas insulated switchgear and a method for use with the gas insulated switchgear. The gas insulated switchgear (1) comprises a metal gas tank (101) filled with an insulating gas to provide an insulating media for electrical components of the gas insulated switchgear (1) inside the metal gas tank (101); a non-metal component (102) arranged on a wall of the metal gas tank (101) and configured to install at least one of the electrical components, one side of the non-metal component (102) being in contact with the insulating gas, and the other side of the non-metal component (102) being in contact with air outside the metal gas tank (101); a wireless transmitter (103) arranged outside the metal gas tank (101) and configured to transmit a measuring signal; and a wireless measuring device (104) arranged inside the metal gas tank (101) and being capable of wirelessly communicating with the wireless transmitter (103) via the non-metal component (102), the wireless measuring device (104) being configured to detect a temperature inside the metal gas tank (101) in response to receiving the measuring signal from the wireless transmitter (103), and transmit the detected temperature to the wireless transmitter (103).
Abstract:
A potential transformer isolating device comprises a swinging rod (11,31), a guide pole(14,34), and a compression device(13,33). The guide pole (14, 34) has a guide-pole guide end (142,342) and an arc-shaped guide-pole connecting end (141,341). When the guide-pole connecting end (141,341) is under the action of the external force, the guide pole can move along the swinging rod (11, 31), and the compression device (13,33) is compressed. When the external force is removed, the guide pole (14, 34) can be reset under the action force of the compression device (13, 33). Therefore, the design of the telescopic round stick is good for improving the insulation levels of the gas insulated switchgear and the control device.