DC wall-through bushing protection device and method
A technology of through-wall casing and protection device, applied in the field of power transmission, can solve the problems of electrical equipment damage, economic loss, large temperature difference, etc.
Active Publication Date: 2018-10-23
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD +1
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Problems solved by technology
However, the location of many DC transmission lines will experience extremely low temperatures in certain seasons, especially in winter, for example, below -40°C, and there is a huge temperature difference between indoors and outdoors (for example, the indoor temperature is 45°C and the outdoor temperature is -42°C).
Under such extremely low temperature and large temperature difference, the performance of the insulating medium inside the DC wall bushing of the DC transmission electrical equipment may have been affected before it is charged. In severe cases, the entire electrical equipment may be damaged after being charged. , and even lead to the outage of the corresponding DC poles, resulting in huge economic losses
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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.
[0027] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.
[0028] Unless otherw...
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The invention relates to a DC wall-through bushing protection device and method, and the device comprises a heating element, an outdoor temperature sensor, an in-tube temperature sensor, and a controller. The heating element is disposed in a DC wall-through bushing, and is used for heating an insulating medium in the DC wall-through bushing. The outdoor temperature sensor is used for detecting anoutdoor environment temperature value To. The in-tube temperature sensor is used for detecting the internal temperature value Tt of the in-tube temperature sensor. The heating element, the outdoor temperature sensor and the in-tube temperature sensor are each in electrical connection with the controller, and the controller is used for comparing To with Tt so as to judge whether to start the heating element or not. The device and method can enable the wall-through bushing to still remain the stable internal temperature of the DC wall-through bushing even under the conditions that the outdoor temperature is extremely low and the difference between the internal and external temperature is extremely great, enable electrical elements in the DC wall-through bushing to work normally, and guarantee the safe and stable operation of DC power transmission equipment in a cold region under the extremely low temperature.
Description
technical field [0001] The invention relates to the technical field of power transmission, in particular to a protection device and method for a DC wall bushing. Background technique [0002] DC transmission technology is a commonly used power transmission technology, which has the advantages of long transmission distance, large transmission capacity, small loss and controllable power. The DC wall bushing is an important electrical equipment in the DC transmission project. It is used to connect the electrical equipment arranged indoors with the electrical equipment arranged outdoors. However, the location of many DC transmission lines will experience extremely low temperatures in certain seasons, especially in winter, for example, below -40°C, and there is a large temperature difference between indoors and outdoors (for example, the indoor temperature is 45°C and the outdoor temperature is -42°C). Under such extremely low temperature and large temperature difference, the pe...
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IPC IPC(8): H02G3/22H02G1/00H01B17/54
CPCH01B17/54H02G1/00H02G3/22
Inventor 施世鸿谭威池代波王燕徐剑峰李天佼廖毅肖国锋
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD