Working method for replacing 10kV transformer through spare power automatic switching technology in electrified mode

A technology for self-injection and transformers, which is applied to electrical components, circuit devices, emergency power arrangements, etc., and can solve problems such as unreliable power supply

Inactive Publication Date: 2014-10-08
云南电网有限责任公司输电分公司
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the low-voltage load transfer equipment is limited by the parallel operation conditions of the

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  • Working method for replacing 10kV transformer through spare power automatic switching technology in electrified mode

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Embodiment Construction

[0017] The content of the present invention will be further elaborated below in conjunction with the accompanying drawings.

[0018] like figure 1 As shown, the present invention adopts the load transfer system with dual-power backup self-switching control device for operation. The load transfer system includes a first power source 1, a second power source mobile transfer transformer or a low-voltage generator set 2, and a first power backup switch 1DL between the two power sources, a second power backup switch 2DL and The bypass cable is the external cable L, and the first load switch K1 and the second load switch K2;

[0019] When the 10kV transformer at the front end of the disconnection point 3 of the power supply circuit for the low-voltage user 4 needs to be overhauled, the low-voltage user is transferred to the mobile power supply transformer or the low-voltage generator set 2 according to the following steps:

[0020] ① Connect the front-end cable of the first load s...

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Abstract

According to the working method for replacing a 10kV transformer through the spare power automatic switching technology in an electrified mode, a load wheeling system with two power supply spare power automatic switching control devices is adopted for work. The load wheeling system comprises a first power supply (1), a second power supply, a movable wheeling transformer or low-voltage electric generator set (2), a first power supply spare power automatic switching switch (1DL), a second power supply spare power automatic switching switch (2DL), an external cable (L), a first load switch (K1) and a second load switch (K2), wherein the first power supply spare power automatic switching switch (1DL), the second power supply spare power automatic switching switch (2DL) and the external cable (L) are arranged between the two power supplies. When the 10kV transformer at the front end of a cut-off point (3) of a power supply circuit of a low-voltage user (4) needs to be overhauled, electricity supply is achieved for the low-voltage user through the movable wheeling transformer or low-voltage electric generator set (2) instead; after the transformer (1) is overhauled, electricity supply is achieved for the low-voltage user through the transformer again; according to the principles of the bypass technology and the spare power automatic switching technology, load wheeling is not limited by time or place or power supply any more, power outage prevention is ensured for the user, and power supply reliability of a power distribution network is improved.

Description

technical field [0001] The invention belongs to the technical field of bypass live operation, and is suitable for the situation that a low-voltage distribution transformer is transferred to maintenance, and realizes uninterrupted power supply to the back-end load of the maintenance transformer by using the principle of bypass live operation and dual-power backup self-injection. Background technique [0002] Continuous power supply is the basic requirement of all sectors of the national economy for electricity. With the continuous development of my country's economic construction, the reliability of urban power supply has become a key assessment index for power supply units. Improving the reliability of power supply has become an important task for the current power sector. Vigorously promoting 10kV line live work is the key to future maintenance of urban distribution networks. The development direction of management is also the main measure to replace power outage maintenance...

Claims

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Application Information

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IPC IPC(8): H02J9/06H02J9/08
Inventor 邓华赵维谚陈义忠李思俊陈品文庞峰崔傲张雯娟
Owner 云南电网有限责任公司输电分公司
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