Method for controlling grouping interlocking time of separators of large sugar refineries

Abstract

The invention relates to the technical field of grouping interlocking of separators of sugar refineries, in particular to a method for controlling grouping interlocking time of the separators of the large sugar refineries. According to the method, a power collector device, A-phase current transformers and a touch screen are included, the power collector device is connected into a 400 V bus, and apower supply 24 VDC is switched on to enable the input rated phase voltage to be 220 VAC and the rated phase current to be 160 mA; and the A-phase current transformers are arranged at cable terminalsof all feed-out loops of the power collector device, the power collector device is used for recording and storing second electric power of electrical equipment, and the A-phase current transformers are provided with hole centers of more than 30 mm. According to the method, two units can be stably matched on the aspect of electromagnetic power, namely, on a power waveform curve, an area defined bythe forward power of the unit A and the reverse power curve of the unit B is as large as possible. In one sugar separation period, the positive power curve of each unit is half, and the negative powercurve of each unit is half, the power curve is similar to sinusoidal waveforms, and two approximately consistent power waveforms are in offset fit, so that the output electric power tends to be stable.

Description

technical field [0001] The invention relates to the technical field of group interlocking of separators in sugar factories, in particular to a control method for group interlocking time of separators in large sugar factories. Background technique [0002] The power system of the sugar factory is a 10kV single-turbine power generation system with a capacity of 12MW. Its operating frequency is greatly affected by load fluctuations. In particular, the factory is equipped with 10 sets of 250kW large centrifuges, and its working mode is short-cycle frequency conversion four-quadrant operation, resulting in multiple The frequency exceeds the standard steam turbine or electric brake. [0003] The 10 centrifuges do not operate in isolation, but use group electrical interlocking to ensure that the equipment in each group does not work in synchronization to avoid impacting the power grid. [0004] The adjustment of the interlocking time is mainly based on observation, the time adjust...

AI Technical Summary

Problems solved by technology

[0008] In view of the impreciseness of the two groups existing in the above-mentioned existing scheme, the speed-up and down-speed coordination of the group pair is roughly formed only by the senses, but the actual electromagnetic power coordination may not be appropriate, and the interlocking time is set for a long time, which not only affects the power coordination effect of the group pair , also affects the production capacity. The three-unit group can guarantee that only one of the three units can increase the speed. Compared with the two-unit group, it is difficult to achieve the level of visual speed-up and down-speed coordination. The effect is designed to avoid simultaneous speed-up, and there is no stability. The problem of electromagnetic power coordination relationship

Images