Control method for replacing low-voltage transformer area distribution box without power failure based on mobile energy storage

Abstract

The invention discloses a control method for replacing a low-voltage transformer area distribution box without power failure based on mobile energy storage. The control method comprises the steps that(1) a mobile energy storage power supply vehicle is connected to a low-voltage overhead line; (2) a system is started to a grid-connected standby state, and a high-voltage circuit breaker and a low-voltage circuit breaker are cut by an operator respectively; (3) the system monitors the voltage and the frequency of a transformer area in real time, and uninterruptedly supplies power to a load through off-grid operation if the voltage and the frequency are abnormal; (4) the operator disassembles a low-voltage branch cable lap joint and replaces a low-voltage distribution box; (5) after the replacement is completed, a high-voltage switch is switched by the operator, and synchronous operation is performed by the system; (6) the system synchronously completes and follows, the operator switcheson the low-voltage switch, and the load is transferred to a power grid for power supply; (7) a mobile energy storage power supply vehicle starts to supplement electricity; and (8) the system is withdrawn after the charging is completed, and a cable is removed. The cost in power grid upgrading and capacity expansion is reduced, and the economical efficiency of distribution network operation is improved.

Description

technical field [0001] The invention relates to a control method for replacing a distribution box in a low-voltage station area without power failure, in particular to a control method for replacing a distribution box in a low-voltage station area without power failure based on mobile energy storage. Background technique [0002] With the development of the economy and cities, the demand for urban power grid transformation is in conflict with the needs of users for uninterrupted power supply and power guarantee for major events. At the same time, some power users have higher and higher requirements for power quality and power supply reliability. It is necessary to upgrade and transform the distribution network in the urban area, including a large number of maintenance operations such as distribution gear adjustment, transformer capacity increase (replacement), transformer master meter replacement, transformer bench elimination, transformer lead wire elimination, and transform...

AI Technical Summary

Problems solved by technology

However, at present, there are many non-intelligent operation links in the on-site access and exit process of mobile energy storage power vehicles participating in power maintenance operations, non-stop maintenance operations, etc., and there are potential safety hazards. Intelligent transformation and upgrading are urgently needed to eliminate potential risks. Improve job safety

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