On-line oil replenishment system and online oil replenishment method for oil-immersed transformers in nuclear power plants
An oil-immersed transformer and transformer oil technology, which is applied in the direction of transformer/inductor cooling, etc., can solve the problem of high voltage discharge danger of transformers, and achieve the effect of preventing overvoltage danger of ionization discharge and avoiding surging oil flow.
Active Publication Date: 2020-12-04
LINGDONG NUCLEAR POWER +5
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Problems solved by technology
[0003] One of the objectives of the present invention is to provide an online oil replenishment system for oil-immersed transformers in nuclear power plants, so as to solve the problem of oil-immersed transformers in the prior art during the oil replenishment process, which is prone to oil flow surges and cause high-voltage discharges inside the transformers dangerous question
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[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0038] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indic...
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Abstract
The invention belongs to the technical field of nuclear power station power transmission and distribution and protection. The invention provides an online oil supplementing system and method for an oil-immersed transformer of a nuclear power station. An oil outlet of an oil storage tank is connected with an oil inlet of a buffer tank through an oil conveying pipe; an oil return port of the oil storage tank is connected with an oil outlet of the buffer tank through an oil return pipe, an oil supplementing pump and a first valve are sequentially arranged on the oil return pipe in the flowing direction of transformer oil, and an oil injection pipe connected with the bottom of a conservator is in bypass connection with the portion, between an oil supplementing pump and a first valve, of the oil return pipe. During the injection of oil, a first valve on the oil return pipe is opened, the oil supplementing pump on the oil return pipe is started, and transformer oil is injected into the oil conservator in a split-flow mode through the oil injection pipe; the oil injection rate of the oil injection pipe can be stably adjusted and controlled by adjusting the opening degree of the first valve on the oil return pipe, thereby avoiding the situation that the injected transformer oil generates oil flow surging and the like in the oil conservator and the oil-immersed transformer, and avoidingthe overpressure danger of the oil-immersed transformer during online oil injection.
Description
technical field [0001] The invention belongs to the technical field of power transmission, distribution and protection of nuclear power plants, and more specifically relates to an online oil replenishment system and an online oil replenishment method for an oil-immersed transformer in a nuclear power plant. Background technique [0002] A transformer is an electrical device that uses the principle of electromagnetic induction to change the AC voltage. It is responsible for converting the power output by the generating set of the nuclear power plant into a suitable level of voltage and outputting it to the grid system. According to the cooling method of the transformer, it can be divided into dry-type transformer and oil-immersed transformer. When the oil-immersed transformer is in normal operation, it needs to use transformer oil as the fluid medium for insulation and cooling, and through the cooling cycle of the transformer oil, the transformer generated during operation Th...
Claims
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IPC IPC(8): H01F27/14
CPCH01F27/14
Inventor 张瑞斌朱升华胡宾王有行宋文修
Owner LINGDONG NUCLEAR POWER