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Keyword faintness controller heats up furnace from constituent mine generation set

Couplet of pyroelectricity of company of Tang Shan iron and steel produced generation set investment to move in March 1997, but fail as a result of a variety of reasons and big electrified wire netting and net, for energy-saving fall bad news, the company decides this generation set offers ferroalloy mine to heat up furnace continuously. This kind of special power supply form, the respect such as the stability of load of hot to mine stove raised strict requirement, if load current is lopsided,will make the voltage that generation set gives out flabby, cycle happening changes, bring about temperature of ferroalloy smelt transformer to lift thereby, iron caustic increases, increase without result power, affect the service life of ferroalloy smelt transformer directly, also affect mine to heat up direct motion of furnace operating mode. Because generation set is to belong to old inertial system, requirement load changes smoothly, cannot have big wave motion, will produce the malign accident of generation set flying car otherwise. To ensure generation set and the facilities that mine heats up furnace are safe, make with report more reasonable, we introduced faintness to control theory, development goes the faintness that applies to small-sized electrified wire netting or generation set power supply mine to heat up furnace personal computer to control a system.

Environment of 1 power supply heats up furnace to mine the influence of automata
Of the electrode inside mine hot stove litre fall the change that will cause electric arc length and operation resistance, change smelt electric current to reach furnace power thereby. Its produce craft demand: Melting above all period should give furnace power supply with full load, this means 3 electrode to be inserted more greatly, electrode electric current is bigger, the temperature inside furnace is higher, be helpful for charging melting with reductive reaction; Want to make sure furnace condition and electric arc are stable next, if furnace condition is flabby, the movement of 3 electrode is frequent, can bring about charging to spend fast stay, thermal efficiency is reduced, influence product quality is mixed index of ton of iron power consumption, bring about furnace condition aggravation; The 3rd balance that should assure three-phase electric current, if electric current is lopsided,spend tall, transformer iron caustic increases, report loss of efficiency; The 4th should assure to press bear curve smelt. Traditional hand uses control is balance in order to achieve three-phase electric current relatively by the place that operates personnel adjustment electrode, but because manipulate rate of heart of staff technology level, responsibility, response,wait for an element, can cause three-phase electric current normally lopsided or the power that enter furnace decreases, cause efficiency low, 3 crucible not frit is connected, furnace condition becomes poor, taphole is little, ton index of iron power consumption is elevatory.
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