-
公开(公告)号：US10941750B2
公开(公告)日：2021-03-09
申请号：US15999607
申请日：2018-08-20
Applicant: ABB Schweiz AG
Inventor： Xiaobo Yang , Chunming Yuan , Chao Yang
Abstract: A method, system and apparatus for operating a hydraulic turbine. A speed adjustment quantity for the hydraulic turbine and a corresponding change in flow quantity are obtained. A rotation speed of the hydraulic turbine is adjusted based on the speed adjustment quantity. A change ratio of the flow quantity with regard to the speed adjustment quantity is determined based on the speed adjustment quantity and the corresponding change in flow quantity. An adjustment manner in which the rotation speed is further adjusted is determined based on the determined based on the determined change ratio of flow quantity. An adjustment manner in which the rotation speed is further adjusted is determined based on the determined change ratio of flow quantity. It enables the hydraulic turbine to track a maximum efficiency operation point under a given power order and water head in real time at a low cost.
-
2.发明申请公开(公告)号：US20190267198A1
公开(公告)日：2019-08-29
申请号：US15796838
申请日：2017-10-29
Applicant: ABB Schweiz AG
Inventor： Xiaobo Yang , Bernt Bergdahl , Chunming Yuan , Dawei Yao , Chao Yang
Abstract: An objective of the invention is to provide a bidirectional power valve for current occurring in a high voltage DC conductor, control method therefor, hybrid multi-terminal HVDC System using the same. The bidirectional power valve includes a first power diode arrangement of a first conducting direction, a second power diode arrangement of a second conducting direction; a mechanical disconnector, being connected with the second power diode arrangement in series; wherein: the first power diode arrangement and the series-connected second power diode arrangement and the mechanical disconnector are connected in parallel; and the first conducting direction of the first power diode arrangement and the second conducting direction of the second power diode arrangement are opposite to each other. The current commutation and re-commutation can be achieved with less requirement of the timing accuracy of switching event which makes the usage of a mechanical disconnector and power diode feasible. This will then result in a significant reduction of cost and power transfer losses.
-
公开(公告)号：US20190078548A1
公开(公告)日：2019-03-14
申请号：US15999607
申请日：2018-08-20
Applicant: ABB Schweiz AG
Inventor： Xiaobo Yang , Chunming Yuan , Chao Yang
Abstract: A method, system and apparatus for operating a hydraulic turbine. A speed adjustment quantity for the hydraulic turbine and a corresponding change in flow quantity are obtained. A rotation speed of the hydraulic turbine is adjusted based on the speed adjustment quantity. A change ratio of the flow quantity with regard to the speed adjustment quantity is determined based on the speed adjustment quantity and the corresponding change in flow quantity. An adjustment manner in which the rotation speed is further adjusted is determined based on the determined based on the determined change ratio of flow quantity. An adjustment manner in which the rotation speed is further adjusted is determined based on the determined change ratio of flow quantity. It enables the hydraulic turbine to track a maximum efficiency operation point under a given power order and water head in real time at a low cost.
-
公开(公告)号：US10179515B2
公开(公告)日：2019-01-15
申请号：US15175733
申请日：2016-06-07
Applicant: ABB Schweiz AG
Inventor： Dawei Yao , Xiaobo Yang , Chunming Yuan , Chao Yang
Abstract: The application relates to a system for charging a battery of an electrical vehicle. The electrical vehicle charging system of the present application is helpful for decreasing the converter capacity while maintaining the charging capacity and electrical vehicles with various nominal voltages can be charged simultaneously. In one aspect the system for charging an electrical vehicle includes: a plurality of central converters, at least one switch electrically connected to the central converters, at least one transformer electrically connected to an external AC power supply, at least one distributed converter for supplying at least one distributed DC voltage with a level below that of the central converter, and a controller connected to the at least one switch.
-
-
-
Search Results
4
records
(took 0.013 seconds)
