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Zero-flashing low-voltage distribution system and operation method thereof

A low-voltage power distribution system and power supply technology, applied in the field of power systems, can solve problems such as load flickering and inability to resist voltage fluctuations, achieve fast access speed, solve the problem of load flickering, and resist voltage fluctuations.

Active Publication Date: 2019-04-26
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 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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  • Zero-flashing low-voltage distribution system and operation method thereof
  • Zero-flashing low-voltage distribution system and operation method thereof
  • Zero-flashing low-voltage distribution system and operation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Such as image 3 As shown, in order to meet the requirements of providing continuous power supply at the moment of line power failure 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 "power supply" for important loads with relatively high power supply requirements 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 connect...

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-flashing low-voltage distribution system and an operation method thereof. The zero-flashing low-voltage distribution system comprises a first power supply, a second power supply, an emergency bus, a second dual-power automatic changeover switch or a solid-state changeover switch, wherein the first power supply and the second power supply are connected with two ordinary buses in a switching station respectively; one end of the emergency bus is connected with a mobile emergency power supply and the first power supply separately through a first dual-power automaticchangeover switch; the other end of the emergency bus is connected with a static energy storage uninterruptible power supply at a user side; the second dual-power automatic changeover switch or the solid-state changeover switch is in load connection with a user. The zero-flashing low-voltage distribution system and the operation method thereof have the advantages that the power supply switching operation of the dual-power automatic changeover switches at a load side under the fault is avoided, thereby solving the problem of load flashing caused by voltage sag during power supply switching, andsolving the problem of voltage fluctuation; if the static energy storage uninterruptible power supply breaks down or is not replenished by the power supplies before a battery runs out, the power supplies are switched to a right circuit for power supply, and sensitive load flashing caused by the voltage sag can occur during 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 power users, so whether the system can run healthily is directly related to the quality of power consumption of 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 conditions, it t...

Claims

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Application Information

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Patent Type & Authority Applications(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
Owner STATE GRID BEIJING ELECTRIC POWER
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