High-voltage distribution device with double breakers used for single bus segmentation and application thereof

A single-busbar segmented, high-voltage power distribution technology, applied in circuit devices, busbar/line layout, electrical components, etc., can solve problems such as user loss, poor flexibility, loss, etc., to ensure reliability and stability, and ensure reliability. performance, stability, and overload avoidance

Active Publication Date: 2014-07-02
POWERCHINA FUJIAN ELECTRIC POWER SURVEY & DESIGN INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The single bus section refers to: the bus is divided into two sections, and the two sections are connected by a section circuit breaker. When the 110kV outgoing line in the substation is 4-5 circuits, and the main transformer is 3 sets , use single-bus section wiring, such as Figure 10 , Figure 11 As shown, there will be two sections, one of which is connected to 2 main transformers or 2 power supply lines. If this section encounters bus failure or maintenance, the 2 main transformers or 2. The power supply line is out of operation. At this

Method used

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  • High-voltage distribution device with double breakers used for single bus segmentation and application thereof
  • High-voltage distribution device with double breakers used for single bus segmentation and application thereof
  • High-voltage distribution device with double breakers used for single bus segmentation and application thereof

Examples

Experimental program
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Example Embodiment

[0037] Example 1:

[0038] Reference attached figure 1 , First, provide a technical solution for a high-voltage power distribution device with 4 circuits and 3 transformers: a high-voltage power distribution device with double circuit breakers as a single bus section includes: the first section bus IM, the second section bus IIM and the section circuit . Each section bus is connected with 2 loops (incoming and outgoing) and 1 main transformer. The main transformers connected to the first section bus IM and the second section bus IIM are #1 main transformer and # respectively 3 main transformers, and at least one of the 2 loops on each section bus is a power cord.

[0039] The segmented circuit includes a first circuit breaker 1CBF, a second circuit breaker 2CBF, and an intermediate node; one end of the first circuit breaker 1CBF is connected to the first segmented bus IM through a first isolating switch 1GF, and the other end is connected through a first current transformer 1CTF...

Example Embodiment

[0046] Example 2:

[0047] Reference attached Figure 4 When there are 5 110kV lines in the substation, and 3 of them are power lines, the configuration is roughly the same as that of Embodiment 1, except that another power line is led out at the intermediate node. Specifically: the intermediate node is divided into intermediate node 1 and intermediate node 2, intermediate node 1 is connected to #2 main transformer through isolation switch 2GB; intermediate node 2 is connected to a power line, through the fifth isolation switch 5G (incoming line isolation switch ), the third circuit breaker 3CB, the third current transformer 3CT and the seventh isolating switch 7G (outgoing line isolating switch) are led out to form #5 line. Therefore, when the IM or IIM fails or the maintenance is disconnected, the third power line (namely #5 line) in the section circuit can supply power to the unfaulted section bus and the main transformer on the section circuit , Improve the stability and rel...

Example Embodiment

[0051] Example 3:

[0052] According to Embodiment 1 of the present invention, the high-voltage power distribution device with dual circuit breakers used as a single busbar section is applied to retrofit old projects. That is, in the existing projects that have been put into operation, the high-voltage power distribution device of the single busbar section is modified. Reference attached Picture 9 , First of all, the equipment of the segmented loop corresponds to the first isolating switch 1GF, the first circuit breaker 1CBF, the first current transformer 1CTF, and the first disconnector 1GF, the first circuit breaker 1CBF, and the The third isolating switch 3GF, and the intermediate node isolating switch 2GB, the second isolating switch 2GF, the second circuit breaker 2CBF, the second current transformer 2CTF, the fourth isolating switch 4GF and other devices; then they are combined into a monolithic SF6 gas The insulated combination equipment has a compact structure and can ...

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Abstract

The invention relates to a high-voltage distribution device, in particular to a high-voltage distribution device with double breakers used for single bus segmentation and the application of the high-voltage distribution device. According to the high-voltage distribution device with the double breakers used for single bus segmentation, a segmented circuit with main transformers and power source incoming lines is provided creatively. The high-voltage distribution device comprises the first breaker 1CBF, the second breaker 2CBF and an intermediate node. The two breakers are connected to two sectioned buses. The intermediate node is connected to the second main transformer through a disconnecting switch 2GB. The high-voltage distribution device can be applied to a newly constructed project and an old project which is put into operation through transformation. The high-voltage distribution device with the double breakers used for single bus segmentation has the advantages that the structural form that loops are symmetrically distributed is adopted, and therefore power supply of a power source and the number of the loops can be effectively matched with each other; it can be guaranteed that under the condition of various possible accidents and the overhauling state, the two loops of power source (main transformers) incoming lines effectively supply power to the load of a power substation, and the reliability and the stability of power supply of a power distribution device are definitely and effectively guaranteed.

Description

technical field [0001] The invention relates to a high-voltage power distribution device, in particular to a high-voltage power distribution device with double circuit breakers as a single busbar segment and its application. It is suitable for substation design with 4 to 5 outgoing lines and 3 main transformers. Background technique [0002] In the design of 35kV-110kV substation, according to GB50059-2011 "35kV-110kV Substation Design Code", Article 3.2.3 "35kV-110kV electrical wiring should adopt bridge shape, enlarged bridge shape, line transformer group or line branch wiring, Wiring of single busbar or single busbar section.", Article 3.2.4 "When 35kV-66kV lines have 8 circuits or more, double busbar wiring should be used. When 110kV lines have 6 circuits or more, double busbar wiring should be used" . According to DL / T5218-2005 "Technical Regulations for Design of 220kV-500kV Substations", paragraph 3 of Article 7.1.4, "For 110kV and 66kV power distribution devices (o...

Claims

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Application Information

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IPC IPC(8): H02B1/22H02J9/00
Inventor 罗明览林红王雄文苏文辉罗湘梅
Owner POWERCHINA FUJIAN ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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