4results about How to "Frequency synchronization" patented technology

The invention belongs to the technical field of distributed energy storage control, and discloses an optimized operation method and system for a multi-network-constructed energy storage system, and the method comprises the steps: carrying out the equivalence of the multi-network-constructed energy storage system, and obtaining an equivalent energy storage system; wherein the equivalent energy storage system comprises an isomorphic network-following converter, an equivalent impedance R and an ideal voltage source which are sequentially connected in series; based on the equivalent energy storage system, obtaining a small signal stability boundary condition by adopting a Routh criterion; and taking the minimum operation cost as an objective function, solving the objective function under operation constraints including small signal stability boundary conditions, and obtaining J and D of each network construction type converter at different moments, so that each network construction type converter operates under the corresponding J and D. The method is suitable for optimized operation configuration of an energy storage system comprising a plurality of network following-constructing converters, and can effectively promote advantage complementation of renewable energy sources and energy storage, thereby improving system stability and operation economy.

This invention provides a ubiquitous network frequency offset estimation method, system, medium, and terminal. The method includes the following steps: receiving wireless signals from multiple carriers of multiple satellites; constructing the satellite-to-ground geometric relationship between each satellite and the terminal; constructing a frequency offset estimation equation based on the wireless signals and the satellite-to-ground geometric relationship; and obtaining a frequency offset estimate based on the frequency offset estimation equation. The ubiquitous network frequency offset estimation method, system, medium, and terminal of this invention can achieve accurate frequency offset estimation even in the absence of GNSS signals in the ubiquitous network, thereby ensuring the continuity and reliability of the ubiquitous network.

The invention discloses an efficiency collaborative optimization system for wireless power transmission of port shore power, comprising a coupling mechanism follower module, a constant frequency control module and a heat dissipation module. The coupling mechanism follower module comprises a position adaptive servo unit, a mobile unit and a fixed unit. The position adaptive servo unit comprises a shore-based end and a ship-based end. The shore-based end is provided with a transmitter, and the ship-based end is provided with a receiver. The transmitter and the receiver realize energy transmission through an electromagnetic coupling mechanism. The mobile unit transports the transmitter and couples and docks with the receiver. The fixed unit is used to fix the relative position of the transmitter and the receiver. The constant frequency control module comprises a phase-controlled inductor circuit to dynamically tune the system circuit. The heat dissipation module is used to dissipate heat from the system. The heat dissipation module comprises a synchronous rectification circuit to improve the power density of the converter in the circuit. The invention optimizes wireless charging from three aspects of structural fixation, circuit frequency and heat dissipation, thereby improving charging efficiency and stability.

The utility model discloses a high frequency induction heating power supply for pipeline anticorrosive layer peeling, including three -phase rectifier bridge, first power module, second power module, first controller and second controller, and first power module and second power module are connected in parallel on the output of three -phase rectifier bridge, and the output of first power module is connected with first induction heating coil, and the output of second power module is connected with second induction heating coil, two controllers pass through respective driver control respective power module output high frequency alternating -current, first controller and second controller communication connection, the utility model discloses to adopt the upper passageway structure, and each group power module can connect induction heating coil and work simultaneously, has improved pipeline anticorrosive layer peeling efficiency, and two groups of power module can control output frequency through respective controller, and simultaneously, through the connection of two controllers, also can form master -slave control, makes the frequency synchronization of two power module output.