Power distribution system

Abstract

The invention relates to a power distribution system, and the system comprises two fixed generator sets (010AP, 011AP) which mutually serve as a standby generator set, a power distribution cabinet (010AR), and a mobile generator set (501AP). The two fixed generator sets (010AP, 011AP) are respectively connected with the power distribution cabinet (010AR) through cables. The interior of a factory where the two fixed generator sets (010AP, 011AP) are fixed is provided with a terminating box (501CR). The two fixed generator sets (010AP, 011AP) are connected with the power distribution cabinet (010AR) through the terminating box (501CR). When the two fixed generator sets (010AP, 011AP) cannot be used, the mobile generator set (501AP) is connected with the terminating box (501CR) through a cable. The system can use an original power supply channel to supply power to the power distribution cabinet (010AR) when all AC power supplies are lost, thereby alleviating the accident consequences, and providing a time window for the recovery of AC power supplies inside and outside the factory. Moreover, the number of access cables of the power distribution cabinet (010AR) and the space occupied by a cable channel are reduced, and the cost is saved.

Description

technical field [0001] The invention belongs to the field of electrical control, and in particular relates to a power distribution system used in nuclear power plants or other power distribution facilities. Background technique [0002] After the Fukushima nuclear accident, the National Nuclear Safety Administration put forward improvement requirements in order to further provide the nuclear safety level of my country's nuclear power plants, and issued the "General Technical Requirements for Nuclear Power Plant Improvement Actions after the Fukushima Nuclear Accident" as a guiding document, "Mobile power supply It is an important part of the technical requirements, and the technical requirements stipulate that "when all the AC power is lost, including the additional diesel generator set on the site, the mobile emergency power supply should be configured to provide temporary power for the implementation of emergency measures to alleviate the consequences of the accident. And pr...

AI Technical Summary

Problems solved by technology

[0005] The low-voltage mobile diesel generator set was one of the improvement actions after the Fukushima accident. At that time, all the equipment had been ordered, and the access point was set based on the principle of least impact on the original system, and the probability of accidents requiring low-voltage mobile power access was considered. is very low, only the terminal box is installed, and the terminal box is not fixedly connected to the switchboard. It only provides a means of temporary termination in case of an accident. When terminating, the original connecting cable needs to be pulled out and transferred to Termination box, but during regular drills, the original connecting cables are three 185mm 2 The hard cable must be pulled out, bent, and moved every time the diesel generator is connected to the test, which is easy to damage the cable and is difficult to implement on site.

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