Method and apparatus for gas leak detection
AssigneeABBSchweiz AG
InventorsLusha Zeng, Juan Wen, Guoming Chuai, Wei Zheng, Yanguo Chen
Life of this patent
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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 estimated 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. A gas pressure within the gas tank under a standard temperature is obtained based on the at least one inside temperature. The gas leak of the gas tank is detected based on the gas pressure.
Claims15
A method for detecting a gas leak of a gas tank of a Gas Insulated Electrical Device, comprising:
- estimating at least one inside temperature for the gas tank based on a plurality of outside temperatures that are collected outside of 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 Insulated Electrical Device;
- obtaining a gas pressure within the gas tank under a standard temperature based on the at least one inside temperature;
- and
- detecting the gas leak of the gas tank based on the gas pressure,
- wherein the plurality of outside temperatures comprise a first outside temperature and a second outside temperature, the first outside temperature being collected at a first outside position near an outside surface of the gas tank, and the second outside temperature being collected at a second outside position on the outside surface,
- wherein the at least one inside temperature includes a first inside temperature, which indicates a temperature for a first inside position on an inside surface of the gas tank, and the first inside temperature is estimated by:
- determining an outside heat flux between the first outside position and the second outside position based on the first and second outside temperatures;
- determining a surface heat flux, that is associated with the first inside temperature, between the second outside position and the first inside outside position;
- and
- calculating the first inside temperature based on the outside heat flux and the surface heat flux.
An apparatus for detecting a gas leak of a gas tank of a Gas Insulated Electrical Device, comprising:
- a determining unit, being configured for determining at least one inside temperature for the gas tank based on a plurality of outside temperatures that are collected outside of 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 Insulated Electrical Device;
- an obtaining unit, being configured for obtaining a gas pressure within the gas tank under a standard temperature based on the at least one inside temperature;
- and
- a detecting unit, being configured for detecting the gas leak of the gas tank based on the gas pressure,
- wherein the plurality of outside temperatures comprise a first outside temperature and a second outside temperature, the first outside temperature being collected at a first outside position near an outside surface of the gas tank, and the second outside temperature being collected at a second outside position on the outside surface,
- wherein the at least one inside temperature includes a first inside temperature, which indicates a temperature for a first inside position on an inside surface of the gas tank, and the determining unit is further configured for:
- determining an outside heat flux between the first outside position and the second outside position based on the first and second outside temperatures;
- determining a surface heat flux, that is associated with the first inside temperature, between the second outside position and the first inside outside position;
- and
- calculating the first inside temperature based on the outside heat flux and the surface heat flux.
Dependencies are inferred from the claim text.