The company recently issued a tender for DCS, and I know very little about this area; I’ve come here to seek help from all of you
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The company operates a biomass power plant with a capacity of 250,000 KW, and is currently preparing to install a DCS system; it is considering using Zhejiang University’s Zhongkong system. I don’t really know much about the situation in this industry or prices and such. I was wondering if anyone has any suggestions, or it would be great if someone could explain to me some things regarding prices. As a newcomer, I thank everyone here.
I see that everyone is talking about control points, and I would like to ask how these control points are calculated or determined?
It should be 25,000 KW; biomass systems don’t seem to reach such a high capacity yet. The design institute will provide an IO list, PID diagrams, network structure diagrams, and the technical specifications for the DCS procurement, and procurement will be carried out in accordance with these
Ah, right, 25MW. I got it wrong. Thank you for your suggestion
Support for domestic products; Zhejiang University Zhongkong is quite good. . .
In terms of power plants, ABB has stronger performance and a greater advantage in experience. His software is available in both industrial and thermal power versions, with many functional blocks designed for use in the power generation industry.
HONEYWELL, which is more mature, could be considered
Let’s take a look at the budget; however, power plants and LSYS are used more frequently
Generally, domestic power plants tend to use GE (Xinhua) or Westinghouse (Emerson) more often
Temperature, flow meters, pressure transmitters, level gauges, etc., which provide 4–20mA signals to the DCS, are AI (analog input) points; while control valves, frequency converters, etc., which have the DCS sending 4–20mA signals to the field, are AO (analog output) points； The DO (Digital Output) points are used to control the opening and closing of the shut-off valve as well as the start/stop of the motor, while the DI points represent the motor operation signal and the shut-off valve opening/closing signal. Classify and tally these, and then specify your requirements, such as: the distance from the control room to the cabinets ； How many operation computers are needed ； Is a power circuit breaker reserved? ； Should the system manufacturer provide the UPS power supply, or should you arrange it yourself? If the manufacturer provides it, you need to determine the power rating of the power supply devices. The system manufacturer will provide you with prices categorized by components: cabinets, control cabinets, main control cards, analog cards, digital cards, bases, power supplies, and so on. It’s up to you to decide the price; if you pretend to not understand, you’ll have to quote a higher price.
Thank you so much; it really helped a lot:lol The company hasn’t received the DCS tender document from the design institute, so I’m not sure either. I also would like to ask you: are the DCS system and the measuring instruments to be purchased separately? I’m not very familiar with this either