2results about How to "Avoid big swings" patented technology

The invention discloses an offshore wind power flexible direct current system cooperative control method and device, particularly relates to the technical field of offshore wind power, and comprises an offshore wind power flexible direct current system cooperative control method which comprises a master-slave control cooperative method. A voltage margin control cooperation method; a droop control cooperation method; the hierarchical control cooperation method further comprises an offshore wind power flexible direct current system cooperation control device which comprises a master-slave control module, a master control station control unit and a slave control station control unit, and a communication unit is used for information interaction between the master converter station and the slave converter station. The method deals with the conditions of offshore wind power plant power fluctuation, alternating current power grid disturbance and the like, avoids large voltage fluctuation and power oscillation, guarantees that the system can still operate basically under the fault condition, meanwhile, achieves optimal distribution of power, provides reliable technical support for large-scale development and utilization of offshore wind power, assists in improving the grid-connected capacity and energy utilization efficiency, and has a wide application prospect. The power generation cost is reduced, and sustainable development of the offshore wind power industry is promoted.

This application discloses a steam regulating valve assembly for a polycrystalline silicon differential pressure coupled distillation column. The steam regulating valve assembly is installed on the steam pipeline to regulate the amount of steam entering the reboiler. The steam regulating valve assembly includes: a main regulating valve unit, which is installed on the steam pipeline and has a first through-hole, and is used to regulate the flow rate of the main steam during the stable operation phase of the distillation column; and an auxiliary regulating valve unit, which is also installed on the steam pipeline and has a second through-hole, which is smaller than the first through-hole, and is used to perform micro-flow control of steam during the start-up phase of the distillation column.