Design of Intelligent Control and Monitoring Systems for Power Transformer Oil Temperature
LI Chang-hu · Journal of Taiyuan University of Science and Technology · 2014
A temperature control system of large power transformer was proposed to retain the constant oil temperature,and the characteristicsof large time delay was analyzed. With the combination of PLC technology with frequency conversion technology and intelligent parameters optimization,the intelligent control and monitoring systems for power transformer oil temperature were presented. The various divided modules of hardware and software systems were constructed respectively,the top oil temperature of power transformer and current load were used as the input parameters of fuzzy control strategy for intelligent optimization. The paper designs intelligent control and monitoring systems for power transformer oil temperature,which makes use of Siemens WinCC V6. 2 as development software of the host computer,Siemens S7-200 PLC as the lower computer,OPC as the communication standard. Trial operation of the system meet the basic needs of a transformer substation in North China,which has laid a good foundation to achieve a substation's integrated automation system,and can be widely used in supervising system of transformer cooling.