CN2374957Y

CN2374957Y - Self-compensating transformer

Info

Publication number: CN2374957Y
Application number: CN 99237726
Authority: CN
Inventors: 罗文周
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-19
Filing date: 1999-05-19
Publication date: 2000-04-19
Anticipated expiration: 2009-05-19

Abstract

The utility model provides a self-compensation transformer, which comprises a transformer and a compensation device which are made into one body. The capacitance uses a dry type capacitance, and a contacting device is replaced by an electronic module. The self-compensation transformer has small size, particularly enhances the power factor of a distribution transformer on a post, improves the power supply quality, saves the electrical energy, and reduces the power cost.

Description

Self-compensation transformer

The utility model relates to a kind of self-compensation transformer, belongs to the power transformer field.

In the 10KV/0.4KV distribution system of cities and towns, be extensive use of the power transformer distribution, by distribution transformer, the electricity process high-voltage transmission that the power plant sends, the user is exported in the transformer step-down.The distribution transformer of national standard is divided according to capacity, and 17 specifications are arranged, and the general above distribution transformer of 400KVA need have special electrician on duty, and monitoring in 24 hours all is placed in the special-purpose switchgear house.In order to improve power factor (PF), increase exerting oneself of equipment, general switchgear house all has centralized compensation formula capacitor box, to idle automatic or manual compensation, makes its power factor (PF) reach code requirement.And 315KVA and following distribution transformer generally are installed in the open, as the common transformer in cities and towns and rural area, generally also claim pole top transformer, because environmental limitations, this transformer does not have this cover system of power factor compensation.

The purpose of this utility model is that a kind of compensation arrangement of design and transformer are the self-compensation transformer of one.

The technical solution of the utility model is that transformer housing and compensation arrangement housing are linked into an integrated entity, and the capacitor C in the compensation arrangement selects dry type electric capacity for use, and contactor replaces with electronic module KH.

The utility model has the advantages that current collection power transformer and compensation arrangement are in one, be specially adapted to 315KVA and following outdoor power transformer application place, owing to select for use dry type electric capacity to solve the excessive problem in compensation arrangement space, adopt electronic module to replace contactor, can avoid impact to electric capacity, prolong electric capacity useful life, improved the line powering quality, its society, economic benefit are huge.In resident's distribution system in cities and towns and rural area, because the load character of user's electricity consumption is unified not to the utmost, so power factor (PF) is very low.According to statistics, the consuming device that uses in the town dweller family, power factor (PF) generally only is between the 0.5-0.8, so the power factor (PF) of the secondary side of transformer generally only is about 0.7, in addition lower.As a 315KVA transformer rated capacity is 315KVA, and active power is:

P1＝315×0.7＝220KW

If power factor (PF) brings up to 0.9 from 0.7, then active power is:

P2＝315×0.9＝283KW

The utilance that has improved transformer is 28.6%

P2-P1＝283-220＝63KW

If every degree electricity is by 0.5 yuan, 1 year electricity consumption time was 8760 hours, and then power supply department reclaims the electricity charge more and is:

RMB=63 * 8760 * 0.5=275940 unit

Even the electricity consumption time, 1 year electricity consumption time, then power supply department also can reclaim the electricity charge 275940 * 0.5=137970 unit more by 50% during in the peak.

At present, pole type transformer mostly is 315KVA, about 27000 yuan of this capacity transformer factory prices, and the electricity charge that power supply department reclaims more than a year are equivalent to the equipment investment of 10 (5).As seen, economic benefit is very huge, and market prospects are very optimistic.

Below to description of drawings: Fig. 1 is the utility model structural representation, and Fig. 2 is a schematic circuit.1 is transformer among Fig. 1, the 2nd, and Electric capacity compensation device.A, B, C represent elementary three-phase coil among Fig. 2, and a, b, c represent secondary three-phase coil, and FU is a fuse, and KM is that knife switch, KH are that electronic module, C are compensation condensers.

Embodiment of the present utility model such as figure provide, and its all technical parameters are selected all identical with the separate type compensation.

Claims

1. a self-compensation transformer mainly comprises transformer and Factor Compensate system And, it is characterized in that transformer housing and compensation arrangement housing are integral, and capacitor is selected dry type electric capacity for use in the compensation arrangement, and contactor replaces with electronic module KH.