Plant power interconnection system among multiple thermal power generating units and operation control method

Abstract

The invention provides a plant power interconnection system among multiple thermal power generating units and an operation control method. The system comprises a first-stage thermal power generating unit, a second-stage thermal power generating unit and a third-stage thermal power generating unit, wherein the first-stage thermal power generating unit comprises a first thermal power generating unitand a second thermal power generating unit; the second-stage thermal power generating unit comprises a third thermal power generating unit and a fourth thermal power generating unit; the third-stagethermal power generating unit comprises a fifth thermal power generating unit and a sixth thermal power generating unit. The operation control method comprises the steps: when one of two thermal powergenerating units in the same stage operates and the other thermal power generating unit is stopped, the current operating unit is controlled to supply power to the current standby unit; and when allthe units of the first-stage thermal power generating unit and the second-stage thermal power generating unit are standby, the fifth thermal power generating unit or the sixth thermal power generatingunit is controlled to supply power to the standby unit. Online shopping electric quantity can be greatly reduced, operation cost of the unit is saved, and economic operation of the unit is optimized.

Description

technical field [0001] The invention relates to the technical field of plant power control technology for thermal power units, in particular to a plant power interconnection system among multiple thermal power units and an operation control method. Background technique [0002] A thermal power plant has a total of 6 units with an installed capacity of 2.54 million kWh. The 220KV system adopts double-bus connection mode. In the first phase, two 320,000,000-h At 320 million, the steam turbine generator set is equipped with#3,#4 high, and the three phases of the 630 million session of the steam turbine generator set are equipped with#5,#6 high. [0003] If both generating units are shut down in the first phase, #1 and #2 high standby transformers will run with factory power for each working section of #1 and #2 generating sets 6KV (both high standby transformer power sources are taken from 220KV busbars, which belong to the purchased grid power); If both units are shut down in...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a plant power interconnection system and operation control method among multiple thermal power units, so as to solve the problem that the power for the power plant of the shutdown units can only be provided by the high-level standby transformer, which requires a large amount of electricity purchased online, resulting in The problem of increased unit operating costs

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