3results about How to "Optimize energy management" patented technology

This invention relates to a low-voltage photovoltaic-storage-charging protection circuit based on relay status feedback, comprising a photovoltaic-storage-charging EMS system, a power grid system, and a photovoltaic system. The photovoltaic-storage-charging EMS system communicates bidirectionally with the latter two via an RS bus. The power grid system includes a control circuit and a first distribution cabinet for connecting to the power grid. The photovoltaic system includes a photovoltaic input relay control circuit and a battery relay control circuit, both connected to the DC bus. On the photovoltaic side, a first current sensor connects to a combiner box and an inverter. The inverter is connected to the photovoltaic panels. The combiner box is also connected to a crystal oscillator circuit communicating with the RS bus via a DC-DC isolated power supply. On the battery side, a second current sensor connects to an energy storage converter and a battery pack. The battery pack includes parallel-connected energy storage batteries and a cycle battery. The cycle battery also supplies power to the charging pile, which is connected to the DC bus via a second distribution cabinet. The system achieves circuit protection through relay status feedback and current monitoring.

The application discloses an energy management strategy of a new energy direct-current micro-grid water production system, which adopts daily operation cost, daily water production and daily abandoned wind and light rate as optimization indexes of the whole system, uses an improved radar chart method to obtain a fitness function, and uses a genetic algorithm to solve an optimal solution of the fitness function under full consideration of specific requirements of water production equipment and influences of converter droop control on unit output. Since a deviation range of a direct-current bus voltage has certain requirements, droop coefficients of the converter droop control have certain limitations, and the droop coefficients influence unit output. The application fully considers influences of control modes of units of the direct-current micro-grid on unit output and special constraint conditions of water production equipment, and realizes optimal operation of water production, water production cost and abandoned wind and light rate.

The utility model relates to a power supply system for new energy engineering machinery and agricultural machinery accessories, and belongs to the technical field of new energy power supply devices. Comprising a vehicle end direct current charging interface and an accessory end electricity taking plug. The vehicle end direct current charging interface is an original national standard direct current charging interface of new energy engineering machinery / agricultural machinery, the accessory end electricity taking plug is electrically connected with a vehicle high-voltage battery pack through the vehicle end direct current charging interface, and the accessory end is connected to the vehicle end direct current charging interface for electricity taking through a cable with the accessory end electricity taking plug. When the accessory works, electricity taking and vehicle charging share the same electrical interface. Through interface multiplexing and intelligent design, a technical closed loop is formed in the aspects of reducing cost, improving adaptability, enhancing safety, optimizing energy management and the like, and a high-reliability and high-compatibility solution is provided for accessory power supply of new energy engineering machinery / agricultural machinery.