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Aiming at the disadvantages in the application of reactive power compensation device with electromagnetic or power electronic switches for pulling in or out the capacitor, a new intelligent compound switch is developed which is based on single-chip computer AT89C52 and applied in var compensation for low voltage capacitor. compared with contactor and TSC, This compound switch has major advantages...
On the basis of analysis of the present situation of substation voltage reactive power integrated control and existing problems, this paper puts forward an implementation scheme of substation reactive power fuzzy control system realized based on Siemens PLC. The operation results show that this kind of control idea is feasible and it can effectively reduce the action number of tap and capacitor of...
As a typical multivariable system, ethylene rectifier is a very complicated system and these variables are connected seriously. Traditional control forms like PID and advanced process control (APC) are very difficult to realize its ideal control effect, they lack the capability to coordinate the variable relations. Analyzing the industry process characteristics and its control development conditions...
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