35kV/10kV pre-assembled integrated intelligent substation

Abstract

The invention provides a 35kV / 10kV pre-assembled integrated intelligent substation. The substation is a three-phase power transformer of 35kV / 10kV, an iron core structure of the 35kV / 10kV three-phase power transformer is a five-core column, a high-voltage winding and a low-voltage winding of each phase are separately connected in series with a high-voltage fuse and a low-voltage fuse to form a high-voltage phase arm and a low-voltage phase arm, and the combination group is marked with D, d0 and has a function of three phases without mutual interference; each part in the substation is integrally arranged in a high-strength steel structured box body, and the characteristic of high integration is highlighted; in the substation, the modern high-new technologies such as a digital technology, an automatic control technology and an information acquisition and transmission technology are combined, and the characteristic of high intelligence is highlighted; the production, the assembly and the debugging of each component in the substrate are completed at one time on the premise of achieving dry type oil free, flame retardance and high-temperature resistance, and the characteristic of high pre-assembly is highlighted; and therefore, the size and the occupied area of the substation are both substantially reduced, and the power supply safety and reliability are ensured.

Description

technical field [0001] The invention belongs to the field of electric equipment, in particular to a 35kV / 10kV prefabricated integrated intelligent substation. Background technique [0002] The traditional 35kV / 10kV substation in my country is a traditional construction mode in which scattered related power equipment is installed in civil construction houses that meet the corresponding national standards, and it is put into operation after successful on-site commissioning. This mode of station construction has many problems such as large land occupation, high building structure, long construction period, large project investment, complex high-voltage lines, exposed live parts, and complicated installation and commissioning work. The 35kV (when the capacity is less than 8000kVA) and 10kV power grids in my country's power system adopt the neutral point non-direct grounding method, and the traditional 35kV / 10kV power transformer and 10kV / 0.4kV station distribution transformer ad...

AI Technical Summary

Problems solved by technology

This mode of station construction has many problems such as large land occupation, high building structure, long construction period, large project investment, complex high-voltage lines, exposed live parts, complicated installation and commissioning work, etc.

The 35kV (when the capacity is less than 8000kVA) and 10kV power grids in my country's power system adopt the neutral point non-direct grounding method, and the traditional 35kV / 10kV power transformer and 10kV / 0.4kV station distribution transformer adopt three-phase three-column Iron core structure, once the line fails, no matter before or after the faulty phase fuse completes the phase failure protection, it will affect the power supply voltage of the non-faulty phase, making its voltage value exceed the deviation range allowed by the power supply standard. Standard power supply, for single-phase modern electronic loads with computers and modern household and office appliances as the main body, will suffer potential damage or shorten the service life, which is an obvious defect of my country's existing traditional power supply technology

In addition, the distance between the traditional 35kV / 10kV substation and the 10kV / 0.4 kV user substation is generally far away, resulting in significant line loss and investment waste, which is also an obvious shortcoming of the existing traditional power supply technology

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