Three-phase equilibrium based reactive compensation method for submerged arc furnace

• Main Authors: LAN ZHENBO, LIU BO, ZHOU QIANG, YAO XIANGYU
• Format: Patent
• Language: English
• Published: 04.11.2015
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to a three-phase equilibrium based reactive compensation method for a submerged arc furnace. The reactive compensation method comprises the following steps of: 1, dividing a load at en electrode end of the submerged arc furnace into a positive sequence load and a negative sequence load, and dividing the three-phase impendence of the load into three-phase balanced impendence and unbalanced impendence; 2, dividing a reactive compensation device of the submerged arc furnace into a positive sequence compensation network and a negative sequence compensation network; 3, obtaining compensation capacity capable of comprehensively compensating a positive sequence reactive component and a negative sequence reactive component of the load; 4, calculating to obtain corresponding active power and reactive power by positive sequence and negative sequence active/reactive power algorithms of the load; and 5, obtaining reactive compensation amount required for each phase of a main circuit of a submerged arc furnace system. By the reactive compensation method, the problem of three-phase current non-equilibrium of a secondary side of the submerged arc furnace system during running can be solved better.