3results about How to "Achieve coordinated operation" patented technology

This invention relates to the field of power supply in highway tunnels, specifically a digital twin method for controlling the power supply of photovoltaic-storage systems in both normal and emergency situations. It includes: constructing a digital twin model of the tunnel power system and synchronizing the real-time operating status of the AC system, DC system, wireless charging system, and energy storage units; executing a control mode algorithm based on the digital twin model, including a normal operating mode and an emergency power supply mode; in the normal operating mode, optimizing the scheduling of the AC, DC systems, and energy storage with the goals of maximizing operational economy, power supply reliability, and renewable energy absorption; in the emergency mode, monitoring the grid status in real time and immediately switching to the emergency mode upon interruption, prioritizing energy storage and photovoltaic power supply for critical loads. This invention achieves state perception and optimized control through digital twins, improving photovoltaic absorption and economic efficiency during normal operation and extending the power supply time for critical loads in emergencies, making it suitable for intelligent power supply scenarios in highway tunnels.

The application discloses a sewage treatment system and method, which comprises a coagulation tank, a flocculation tank and a sedimentation tank. The coagulation tank, the flocculation tank and the sedimentation tank are sequentially communicated along the sewage flow direction. In addition, part of the sediment in the sedimentation tank returns to the flocculation tank. The system further comprises a control module, which comprises a carrier control module, the carrier control module adjusts the amount of circulating carriers and the amount of external carriers in the sediment returned by the sedimentation tank to the flocculation tank by monitoring the first actual carrier density in the coagulation tank and the water quantity and water quality of the water inlet end, so that the carrier density in the flocculation tank is kept within a first preset range; and a dosing control module, the dosing control module adjusts the dosing amount added to the coagulation tank and the flocculation tank by monitoring the second actual carrier density of the flocculation tank and combining the water quantity and water quality of the water inlet end. The sewage treatment system and method of the embodiment of the application improve the efficiency of sewage treatment and the water quality by coordinating the sewage treatment equipment.

A front main power station and a rear main power station are arranged on a ship, the front main power station and the rear main power station are each provided with a medium-voltage main distribution board, the rated voltage of the medium-voltage main distribution boards is AC6.6 kV, and the medium-voltage main distribution boards are used for supplying power to an electric propulsion device, a side thrust motor and a lower-level auxiliary power grid; the auxiliary power grid comprises two voltage levels of AC400V and AC230V, and the medium-voltage main distribution board is subjected to voltage reduction through an AC6.6 kV / AC400V transformer to supply power; the micro-grid comprises an AC400V and AC230V two-stage power distribution system, and is provided with a micro-grid power distribution board, a point of common connection (PCC), a wind power generation device, a photovoltaic power generation device, a bidirectional energy storage system and an AC400V / AC230V transformer; the micro-grid and the auxiliary power grid operate in a grid-connected mode under the normal working condition, and operation mode switching is achieved when the main power station or the micro-grid breaks down. The invention provides a micro-grid-containing double-power-station ship integrated power system architecture and an operation mode thereof, and coordinated operation of a double-power-station integrated power system and a micro-grid is realized.