Calculation method and device for short-circuit current of DC system in nuclear power plant
A DC system and short-circuit current technology, applied in the field of power engineering, can solve the problems of lower sensitivity than the calculated value, insufficient blocking capacity of protective components, and achieve the effect of reducing safety and economic losses and improving short-circuit protection.
Active Publication Date: 2022-03-22
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology
[0005] The present disclosure provides a calculation method and device for the short-circuit current of the DC system of a nuclear power plant, to solve the possible problems of insufficient breaking capacity of the protection coordination components and lower sensitivity when a short circuit occurs when calculating the short-circuit current value in the related art for DC system protection coordination. Calculations etc.
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[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the specific implementation manners of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
[0056] It should be noted that, in the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combined arbitrarily with each other.
[0057] Wherein, the terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. As used in the examples of this disclosure and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms un...
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Embodiments of the present disclosure provide a method and device for calculating the short-circuit current of the DC system of a nuclear power plant, wherein the method includes: determining the maximum operating condition and the minimum operating condition of the DC system of the nuclear power plant; Calculating the maximum short-circuit current of the DC bus in the DC system of the nuclear power plant under operating conditions; and calculating the minimum short-circuit current of the DC bus in the DC system of the nuclear power plant based on the minimum operating conditions of the DC system of the nuclear power plant. The embodiment of the present disclosure determines the maximum and minimum operating conditions of the nuclear power plant, and calculates the maximum and minimum short-circuit currents in the DC system of the nuclear power plant based on the maximum and minimum operating conditions, and is used to solve the problem of performing direct current in accordance with a single short-circuit current value in related technologies. When the system protection is coordinated, it may cause problems such as insufficient blocking capacity of the protection coordination components and the sensitivity lower than the calculated value when a short circuit occurs, so as to better protect the line from short circuit and reduce the safety and economic losses caused by short circuit fire.
Description
technical field [0001] The present disclosure relates to the technical field of electric power engineering, in particular to a calculation method for the short-circuit current of a DC system of a nuclear power plant, and a calculation device for the short-circuit current of the DC system of a nuclear power plant. Background technique [0002] In the DC system of nuclear power plants, the short-circuit current is very harmful. According to statistics, electrical fires are mainly caused by short-circuit, and the loss of life and property caused by short-circuit fire is far beyond the value of the protected section of the line, especially when the fire causes an explosion, the consequences will be more serious. Therefore, it is necessary to set up a short-circuit protection device to prevent short-circuit fire and protect the normal operation of the line. In order to ensure that the short-circuit protection equipment can break the short-circuit current correctly, it is necessa...
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IPC IPC(8): G01R31/00G06F17/10
CPCG01R31/00G06F17/10
Inventor 齐索妮陈怀宇沈岩姜庆水曾敬梅周晓斌王贵姜博文黄艺昀
Owner CHINA NUCLEAR POWER ENG CO LTD