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My current project is a coal fired power-plant having 700MW units. The plant uses fuel oil for start-up. Each boiler is protected using a BMS, designed for NFPA85. That's nothing new.
I am used to systems like this having a single pair of redundant control processors, arranged as 1 out of two. But my past experience is based on smaller boilers.
This time, the BMS vendor is proposing to split the BMS processing between two pairs of redundant controllers. (i.e. each half will have its own pair of redundant processors.) At this stage I don't know why this arrangement is necessary, but assume there must be some issue with controller capacity. To my mind this will cut the system reliability in half.
I wondered if anyone out there can let me have the benefit of their experience. Would this be a normal arrangement for larger boilers? Has anyone else worked with an arrangement like this before?
I am used to systems like this having a single pair of redundant control processors, arranged as 1 out of two. But my past experience is based on smaller boilers.
This time, the BMS vendor is proposing to split the BMS processing between two pairs of redundant controllers. (i.e. each half will have its own pair of redundant processors.) At this stage I don't know why this arrangement is necessary, but assume there must be some issue with controller capacity. To my mind this will cut the system reliability in half.
I wondered if anyone out there can let me have the benefit of their experience. Would this be a normal arrangement for larger boilers? Has anyone else worked with an arrangement like this before?
