A zero-flicker low-voltage power distribution system and its operating method

A technology of low-voltage power distribution system and operation method, applied in the field of power system, can solve the problems of load flickering, unable to resist voltage fluctuations, etc., to achieve the effect of fast connection speed, solving the problem of load flickering, and resisting voltage fluctuations

Active Publication Date: 2021-03-02
STATE GRID BEIJING ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emergency power supply configuration of "dual power supply + emergency busbar + dual power supply automatic transfer switch ATS + mobile emergency power supply" solves the problem of power outages caused by double-circuit faults, but it cannot resist voltage fluctuations, and there will be load flicker caused by voltage sags during power supply switching

Method used

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  • A zero-flicker low-voltage power distribution system and its operating method
  • A zero-flicker low-voltage power distribution system and its operating method
  • A zero-flicker low-voltage power distribution system and its operating method

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Such as image 3 As shown, in order to provide continuous power supply at the moment of line power loss and resist voltage fluctuations, a static energy storage uninterruptible power supply UPS is connected in series between the emergency bus 5 and the load to form a " Dual power supply + emergency busbar 5 + static energy storage uninterruptible power supply UPS + dual power supply automatic transfer switch ATS + mobile emergency power supply" emergency power supply configuration;

[0051] The 4# busbar and 5# busbar of the switch station are respectively connected with the 4# busbar and 5# busbar of the power distribution room to form a dual power supply composed of the first power supply 1 and the second power supply 2; one end of the emergency busbar 5 is automatically connected to the first dual power supply The transfer switch ATS 6 is respectively connected to the mobile emergency power supply and the first power supply 1, the other end of the emergency bus 5 is ...

Embodiment 2

[0054] Such as Figure 4 As shown, the emergency power supply configuration of "dual power supply + emergency busbar 5 + static energy storage uninterruptible power supply UPS + solid-state transfer switch SSTS 8 + mobile emergency power supply" is adopted for particularly important loads;

[0055] The 4# busbar and 5# busbar of the switch station are respectively connected with the 4# busbar and 5# busbar of the power distribution room to form a dual power supply composed of the first power supply 1 and the second power supply 2; one end of the emergency busbar 5 is automatically connected to the first dual power supply The transfer switch ATS 6 is respectively connected to the mobile emergency power supply and the first power supply 1, the other end of the emergency bus 5 is connected to the static energy storage uninterruptible power supply UPS power supply, and the important load on the user side is respectively connected to the static energy storage uninterruptible power s...

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Abstract

The invention discloses a zero-flicker low-voltage power distribution system and an operation method, including a first power supply and a second power supply respectively connected to two common buses in a switching station; an emergency bus, and one end of the emergency bus automatically switches through the first dual power supply They are respectively connected to the mobile emergency power supply and the first power supply; the other end of the emergency bus is connected to the static energy storage uninterruptible power supply on the user side; and the second dual power supply automatic transfer switch or solid-state transfer switch connected to the user load. The invention avoids the switching operation of the double power supply on the load side automatically switching the power supply under fault, thereby solving the problem of load flicker caused by the voltage sag during the power supply switching, and at the same time solving the problem of voltage fluctuation. If the static energy storage uninterruptible power supply fails or the power supply is not supplemented before the power is exhausted, the 2# dual power supply automatic switch will switch the power supply to the right power supply, and the sensitive load will flicker caused by the voltage sag during the power supply switching.

Description

【Technical field】 [0001] The invention belongs to the technical field of power systems, and relates to an emergency power supply system, in particular to a zero-flicker low-voltage power distribution system and an operation method. 【Background technique】 [0002] There is a very close relationship between the low-voltage power distribution system and the power users, so whether the system can operate healthily is directly related to the quality of power consumption of the users. [0003] At present, ordinary low-voltage power distribution systems mostly use single-circuit or dual-circuit power supply, equipped with dual power supply automatic transfer switch ATS, static energy storage uninterruptible power supply UPS to realize power supply switching and short-term continuous power supply in case of failure, and also equipped with mobile power vehicles. As a temporary emergency power supply, although these devices can temporarily restore power supply under certain fault cond...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H02J9/06H02J9/08
CPCH02J9/062H02J9/08
Inventor赖祥生尚博康琦马文营刘动程序张宏炯钱叶牛鲁籍元丁丹蕾
OwnerSTATE GRID BEIJING ELECTRIC POWER