3results about How to "Fast frequency" patented technology

This invention discloses a control method for grid-connected static synchronous condensers based on virtual inertia and strong damping support. The method includes: establishing a mathematical model of the wind turbine and the grid-connected static synchronous condenser; using a multi-phase-shifting transformer as the topology for multiple static synchronous condensers connected in parallel to the wind farm grid connection point; constructing a multi-objective coordinated control relationship based on the dynamic characteristics of the grid-connected converter and energy storage, considering supporting power, system frequency, AC voltage, and converter energy; introducing virtual inertia, adaptive damping, rapid voltage regulation, and energy stabilization mechanisms to correct the multi-objective coordinated control relationship; and building a simulation and hardware-in-the-loop experimental platform for verification. This invention simulates the rotor inertia of a synchronous motor through virtual inertia, adjusts the damping magnitude through adaptive damping, and maintains DC-side voltage balance through energy stabilization, thus solving the problems of traditional static synchronous condensers lacking autonomous grid connection capability, oscillation under weak grid conditions, insufficient inertia, and slow response.

This invention discloses a distributed model predictive control method for offshore front-end speed-regulating wind turbines, belonging to the field of new energy power generation technology. The method decomposes the overall control task into three parallel subsystems: pitch control, hydraulic torque regulation, and excitation, and establishes local discrete predictive models for each. In each sampling period, rolling optimization of each subsystem is performed in parallel, and the future predicted trajectories of generator speed and terminal voltage are introduced as globally consistent variables. By constructing an augmented Lagrangian cost function based on the alternating direction multiplier method and iteratively solving it, the local predicted trajectories are driven to converge to the globally consistent optimal trajectory. Finally, the first instruction of the optimal control sequence obtained after iterative convergence is output to each actuator, achieving coordinated control of the three subsystems. This allows for rapid and smooth simultaneous satisfaction of frequency and voltage synchronization conditions before grid connection, effectively suppressing coupling interference and wind speed fluctuations, and improving grid connection quality and operational reliability.

The utility model provides a kind of rapid optical frequency detection device, including the Michelson interferometer with one input light path, the Michelson interferometer has at least 2 interference arms, the interference arm tail is provided with the same mirror as the interference arm number, input light is reflected after entering interference arm Michelson interferometer, generates multipath output light, the output light is received by first photoelectric detector, and the first photoelectric detection signal generated is used to calculate the optical frequency variation of input light;One light path in the input light is input to wavelength division multiplexer, and the two light output by the wavelength division multiplexer is received by two second photoelectric detectors, and second photoelectric detection signal is generated to calculate the absolute optical frequency of input light.