柴油发电机组台数选择
经过计算确定柴油发电机容量后，方案一选择一台大功率柴油发电机组；方案二选择二台小功率柴油发电机组配上并机柜。问题哪个方案经济合理？ 这个问题比较复杂。一台大功率的，造价低于两台带并机柜，利用启动大功率电机，但存在安装问题、油箱问题、可靠性低于2台。所以要综合比较 这个各有优缺点要考虑,不单单是价格问题.要结合你的负荷工况去考虑,单台要考虑会不会有低负载问题.两台运行灵活. In deciding whether a single or multiple generators should be installed there are various factors to be considered, such as:
1. Reliability
2. Performance
3. Cost
4. Generator and Room size
5. Efficiency
6. Load variation
7. Flexibility
Risks //
There are risks associated with the parallel operation of generator sets; both between sets and with the utility supply and these risks should be balanced with the benefits.
The risks are:
#1
Where adequate load shedding has not been provided or where the load is maintained at a high level, there is a risk that, if one generator fails, the remaining generators on the system may not be able to support the system load.
Load shedding should always be incorporated into a paralleling generation scheme and the reserve capacity at any time during operation should correspond with the amount of load that can be accepted if a running generator fails.
#2
Not all generators can be paralleled together – if sets of a different manufacturer or of a significantly different size are to be paralleled, consult the local Cummins distributor before proceeding.
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