公开(公告)号：US20210184462A1

公开(公告)日：2021-06-17

申请号：US16638670

申请日：2018-07-05

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Manoj GUPTA ,  Janakiraman SIVASANKARAN ,  Anoop Vijay TIWARI

IPC: H02J3/18 ,  H02J3/38

Abstract: A method for controlling a renewable energy power plant comprising a plurality of renewable energy generators, the method comprising: carrying out the following steps dynamically: determining a reactive power capability value of the power plant based on the generated active power of each of the renewable energy generators within the power plant; determining a reactive power exchange limit value based on a measured grid voltage level; and controlling the power plant so that the generated reactive power does not exceed the lower of the determined reactive power capability value and the determined reactive power exchange limit value that are determined dynamically.

公开(公告)号：US20210143642A1

公开(公告)日：2021-05-13

申请号：US16618689

申请日：2018-05-15

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Manoj GUPTA ,  Ravi KUMAR ,  Janakiraman SIVASANKARAN ,  Mario Dante JARDIEL ,  Anoop Vijay TIWARI ,  Kouroush NAYEBI

IPC: H02J3/18 ,  H02J13/00 ,  H02J3/00 ,  G05B15/02

Abstract: There is provided a method of operating a renewable power plant that is connected to a wider power network by a bus. The method comprises: identifying a predetermined voltage condition of the renewable power plant or of the bus; controlling the renewable power plant to maintain zero reactive power exchange at the bus for a first period; calculating an average voltage level of the bus that was achieved during the first period; and controlling the renewable power plant to maintain the voltage output at a set voltage level for a second period, the set voltage level being substantially equal to the calculated average voltage level. The method ensures that voltage oscillations due to a push-pull phenomenon between a power plant controller and the power network do not upset the stability of the grid.