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

A technology of mobile energy storage and low-voltage station areas, which is applied in the direction of electrical components, circuit devices, emergency power supply arrangements, etc., can solve problems such as potential safety hazards, eliminate potential safety hazards, reduce burdens, solve equipment power outage maintenance and uninterrupted power supply the paradoxical effect of

CN112332281AInactive Publication Date: 2021-02-05STATE GRID JIANGSU ELECTRIC POWER CO LTD NANTONG POWER SUPPLY BRANCH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-02-05
Estimated Expiration
Not applicable · inactive patent

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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power supply; (7) a mobile energy storage power supply vehicle starts to supplement electricity; and (8) the system is withdrawn after the charging is completed, and a cable is removed.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.
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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...

Examples

Embodiment Construction

[0060] A control method for replacing a distribution box in a low-voltage station area without power failure based on mobile energy storage, comprising the following steps:

[0061] (1) The mobile energy storage power supply vehicle is connected to the low-voltage overhead line;

[0062] (2) The system is turned on to the grid-connected standby state, and the operators switch off the high and low voltage circuit breakers respectively;

[0063] (3) The system monitors the voltage and frequency of the station area in real time, and if it is abnormal, it will switch to off-grid operation to provide uninterrupted power supply to the load;

[0064] (4) The operator removes the lap joints of the low-voltage branch cables and replaces the low-voltage distribution box;

[0065] (5) After the replacement is completed, the operator closes the high-voltage switch, and the system operates at the same time;

[0066] (6) The system is completed and followed at the same time, the operator ...