A Research on Instability of Small Flow in SCADA and an Optimizing Design for Control

SCADA is a set of systems with a higher automatic level of the long-distance pipeline. When the sub-transmission stations in the state of full load, the automatic control of sub-output capacity is quite stable working at certain settings. However, partly sub-transmission stations sub-output capacity is far less than the design of sub-output capacity in actual projects, which makes the PLC parameter of the control system in the stations difficult to set. And unstable sub-output often appears. This paper gives the optimizing design to achieve stable sub-output in small flow, and gives the algorithms to achieve better effects for sub-output control on the practical spots under the condition of unchanging the original structure of the system.