Abstract
Hydrogen gas is circulated in a closed loop within the generators to remove heat from its active parts. Then it is cooled by gas-to-water heat exchangers that are part of the stator frame. Faster heat dissipation of generators in power plant call for hydrogen cooling system (HCS) at generating end. Purity in hydrogen (H2) improves its ability to dissipate heat within generators. Therefore, there is an essential requirement of a highly reliable and efficient process control and monitoring system of H2 cooling. This paper presents development and implementation of supervisory control and data acquisition (SCADA) based process control and monitoring system. It proposes a novel six stage standby redundant structured (S3RS) HCS for generators cooling in typical thermal power plant. The entire process control and monitoring of HCS has been developed and simulated on RSViewSE, a real-time industrial automation platform by Allen Bradley–Rockwell Automation. And, the system reliability of proposed S3RS process model is implemented using MATLAB. This process model satisfies the requirement of IEEE Std. C37.1™-2007, the standard for SCADA and Automation Systems. It also follows IEEE Std. 493™-1997, the standard for design of reliable industrial and commercial power systems, and IEC 60034-3, the standard for rotating electrical machines.
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