CN205080418U

CN205080418U - Strong oil circulation forced air cooling of transformer is intelligent control device but

Info

Publication number: CN205080418U
Application number: CN201520909220.6U
Authority: CN
Inventors: 李鄢; 姚伟瑾; 刘妍; 刘国藩
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-11-16
Filing date: 2015-11-16
Publication date: 2016-03-09
Anticipated expiration: 2025-11-16

Abstract

Strong oil circulation forced air cooling of transformer is intelligent control device but relates to a transformer with but controlling means of strong oil circulation forced air cooling. Controlling means installs inside transformer forced air cooling switch board, including one set at least major loop and control circuit, its characterized in that the major loop includes, cooler group circuit breaker, and the latent oil pump ac contactor of control, the oil pump motor protection switch that dives controls no. 1 fan ac contactor, controls fan ac contactor, 1 fan motor protection switch, 2 fan motor protection switch no. 2, control circuit includes the circuit breaker, touch -sensitive screen, PLC programmable controller, PLC temperature input module, detect transformer top layer oil temperature sensor pt100 platinum resistance. This controlling means can solve and cause the problem that transformer oil temperature is low under the condition that current transformer is low at ambient temperature or the load is little.

Description

Transformer forced-oil-circulation air is intelligent controlling device but

Technical field

The utility model belongs to transformer control technology field, relates to a kind of transformer forced-oil-circulation air but intelligent controlling device.

Background technology

In transformer forced-oil-circulation air but controls, when existing apparatus is transformer operation, work cooler package startup optimization, putting into operation or excising of auxiliary cooler group is controlled according to top-oil temperature switching value contact point signal, when work cooler package or auxiliary cooler group fault, automatically put into operation cooler package for subsequent use, when after trouble shooting, and excision cooler package for subsequent use automatically.And lower in ambient temperature, when main-transformer load is low, the heat that inside transformer produces is just few, and oil temperature is just low, and work cooler package is run according to fixed mode, and oil temperature will be caused on the low side, runs cause harmful effect to transformer.In order to ensure the safe operation of transformer, temperature of oil in transformer just can not be on the low side, address this problem, only has reduction cooling capacity, the oil temperature requirement that transformer normally runs could be met, this just needs operation maintenance personnel to arrive on-the-spot adjustment cooler package working quantity or manual demolition cooler package air-blower control loop, realizes reducing cooling capacity, ensure transformer reliability service to reduce fan operation quantity.When load increases, when oil temperature raises, need again rewiring to recover fan operation control loop, such operation is both inconvenient, also dangerous.

Summary of the invention

The utility model provides a kind of transformer forced-oil-circulation air but intelligent controlling device, and it can solve the problem causing temperature of oil in transformer on the low side existing transformer is low in environment temperature, load is little.

The technical scheme that the utility model adopts is: this transformer forced-oil-circulation air but intelligent controlling device, comprises at least a set of major loop and control loop; It is characterized in that described major loop comprises, cooler package circuit breaker Q 1, control oil-immersed pump A.C. contactor KM1, oil-immersed pump motor protecting switch QM1 connects and forms oil-immersed pump independence major loop;

Described cooler package circuit breaker Q 1, controls No. 1 blower fan A.C. contactor KM11, No. 1 blower motor protection switch QM11 series connection formation No. 1 blower fan independence major loop; Described cooler package circuit breaker Q 1, controls No. 2 blower fan A.C. contactor KM12, No. 2 blower motor protection switch QM12 series connection formation No. 2 blower fan independence major loops;

Described control loop comprises circuit breaker Q K1, touch-screen P0, PLC programmable controller P1, PLC temperature load module P2, detects transformer top-oil temperature sensor Pt100 platinum resistance R1;

Described PLC output point and control oil-immersed pump A.C. contactor KM1 coil, oil-immersed pump motor protecting switch QM1 often opens auxiliary contact series connection and forms oil-immersed pump control loop;

Described PLC output point and No. 1 blower fan A.C. contactor KM11 coil, No. 1 blower motor protection switch QM11 often drives auxiliary contact and forms No. 1 air-blower control loop; Described PLC output point and No. 2 blower fan A.C. contactor KM12 coils, No. 2 blower motor protection switch QM12 often drive auxiliary contact and form No. 2 air-blower control loops.

The beneficial effect that the utility model has has: transformer forced-oil-circulation air is intelligent controlling device but, be applicable to transformer forced-oil-circulation air but control, this control device solves in the winter time, when environment temperature is low, load is little, automatically can adjust cooling capacity, avoid temperature of oil in transformer situation on the low side and occur; When load increases, the cooler package that can automatically put into operation or fan operation number of units, the situation avoiding high oil temperature occurs.

This control device, under low temperature underload, runs due to excision cooler package or reduces fan operation number of units, having energy-saving effect.

Accompanying drawing explanation

Fig. 1 is major loop electronic schematic diagram of the present utility model.

Fig. 2 is control loop electronic schematic diagram of the present utility model.

Embodiment

The utility model is described in further detail by reference to the accompanying drawings.

Transformer forced-oil-circulation air shown in Fig. 1, Fig. 2 but intelligent controlling device, comprises a set of major loop and control loop; Control loop comprises Pt100 platinum resistance R1 and adopts three-wire system to be connected with PLC temperature load module; KM1 contactor coil (A1) is connected with PLC output point (Q0.4), KM1 coil (A2) and QM1 often drive auxiliary contact (14) and are connected, and QM1 often drives auxiliary contact (13) and holds to connect with QK1 (2) and form oil-immersed pump control loop;

KM11 contactor coil (A1) is connected with PLC output point (Q0.5), KM11 contactor coil (A2) and QM11 often drive auxiliary contact (14) and are connected, QM11 often drives auxiliary contact (13) and is connected with QM1 (13), forms No. 1 air-blower control loop;

KM12 contactor coil (A1) is connected with PLC output point (Q0.6), KM12 contactor coil (A2) and QM12 often drive auxiliary contact (14) and are connected, QM12 often drives auxiliary contact (13) and is connected with QM11 (13), forms No. 2 air-blower control loops; QK1 (1) connects Q1 (6); PLC exports common port (2L, 3L) and is connected with inlet wire N; Pt100 platinum resistance signal wire correspondence is connected with PLC temperature load module (A+), (A-), (a-), adopts 3 line connections, wherein (A+), and (a+) is connected.By touch-screen P0 according to transformer service requirement, setup control main-transformer oil temperature parameter, the transformer top-oil temperature gathered by Pt100 platinum resistance compares in real time with setup parameter, PLC is according to set up logical relation model, oil-immersed pump control loop, No. 1 air-blower control loop, No. 2 air-blower control loops are driven by output point, complete automatic switching cooler package or fan operation number of units, avoid main-transformer low in environment temperature, cause oil temperature phenomenon on the low side to occur when load is little, ensure that transformer normally runs.This transformer forced-oil-circulation air but intelligent controlling device is applicable to control to organize refrigeratory more, and often organize refrigeratory 1 covering device, for organizing refrigeratory, multiple stage blower fan, only needs extension loop to realize more.

Claims

1. transformer forced-oil-circulation air but intelligent controlling device, comprises at least a set of major loop and control loop; It is characterized in that described major loop comprises, cooler package isolating switch (Q1), control oil-immersed pump A.C. contactor (KM1), oil-immersed pump motor protecting switch (QM1) series connection forms oil-immersed pump independence major loop;

Described cooler package isolating switch (Q1), controls No. 1 blower fan A.C. contactor (KM11), and No. 1 blower motor protection switch (QM11) is connected formation No. 1 blower fan independence major loop; Described cooler package isolating switch (Q1), controls No. 2 blower fan A.C. contactors (KM12), and No. 2 blower motor protection switches (QM12) are connected formation No. 2 blower fan independence major loops;

Described control loop comprises isolating switch (QK1), touch-screen (P0), PLC programmable controller (P1), PLC temperature load module (P2), detects transformer top-oil temperature sensor Pt100 platinum resistance (R1); Described PLC output point and control oil-immersed pump A.C. contactor (KM1) coil, oil-immersed pump motor protecting switch (QM1) is often opened auxiliary contact series connection and is formed oil-immersed pump control loop;

Described PLC output point and No. 1 blower fan A.C. contactor (KM11) coil, No. 1 blower motor protection switch (QM11) often opens auxiliary contact series connection formation No. 1 air-blower control loop; Described PLC output point and No. 2 blower fan A.C. contactor (KM12) coils, No. 2 blower motor protection switches (QM12) often open auxiliary contact series connection formation No. 2 air-blower control loops.

2. transformer forced-oil-circulation air according to claim 1 but intelligent controlling device, is characterized in that transformer top-oil temperature sensor is Pt100 platinum resistance three line temperature sensor.