38results about How to "Achieving in-place consumption" patented technology

The invention discloses an AC and DC hybrid micro-grid optimal planning method considering a line factor. The method comprises: establishing a target function of an AC and DC hybrid micro-grid considering a line factor relative to investment cost, loss load cost, and system loss, comprehensively considering system power constraint, system branch constraint, distributed energy output constraint, node voltage deviation constraint, random fault constraint of equipment and other constraints, using Monte Cario to perform fault sampling, through mixed integer linear programming, solving, to obtain ascientific and economical AC and DC hybrid micro-grid distributed power addressing capacity grading optimal configuration result. The method solves a configuration problem of effective access of a distributed power supply in expansion planning of an AC micro-grid, improves on-site elimination capability of the hybrid micro-grid, and meanwhile realizes economical efficiency and reliability of planning of the AC and DC hybrid micro-grid.

The invention discloses a new energy power supply system for an urban rail traction network and a control method. The system comprises an independent energy storage system located in a middle sectionof a line and a wind-photovoltaic-energy storage hybrid power generation system located at a car depot or a parking lot at an end of the line. The method comprises a step of obtaining a load predictedpower and an expected peak-valley value according to offline prediction data and historical data and judging whether there is a load based on urban rail running data, and a step of judging an operating condition based on a real-time voltage, comparing a predicted load power at a next moment and the expected peak-valley value and judging whether a state is a load running peak-valley state, and determining different control strategies through a judgment result to realize the effective control of an energy storage device in an independent energy storage system and a wind-photovoltaic-energy storage hybrid power generation device and an energy storage device in the wind-photovoltaic-energy storage hybrid power generation system. According to the invention, the consumption of renewable energysources such as local wind and light can be promoted, the grid pressure fluctuation is improved, the peak-load shifting is carried out for the load while the regenerative braking energy is effectivelyrecycled, the operating cost of urban rails is reduced, and the economic benefits are good.

A control method for photovoltaic power generation and power grid three-phase balance is implemented by a measurement and control device and a power grid treatment device and comprises the steps of 1,judging a power flow direction of a power grid according to a power read by the measurement and control device, wherein power is supplied to a load from the power grid when the power is positive, andthe power is fed to the power grid by photovoltaic power generation when the power is negative; 2, performing average value calculation on the read three-phase power grid by the measurement and control device; 3, judging a phase circuit with maximum power supplied from the power grid to the load or maximum power fed to the power grid by photovoltaic power generation when the three-phase power isunbalanced; 4, calculating a power allocation coefficient of each power grid treatment device in the three-phase unbalanced line; 5, calculating a power allocation value of each power grid treatment device in the three-phase unbalanced line; and 6, controlling the corresponding power grid treatment devices to output or absorb the power by the measurement and control device according to the power allocation value of the power grid treatment device. By the control method, the purpose of three-phase power balance of the power grid is achieved.

The invention provides a distributed photovoltaic cluster control method and device. The distributed photovoltaic cluster control method comprises the steps of acquiring an active power of a distributed photovoltaic cluster and running data of a power distribution network; solving a hybrid integer second-order cone planning model by a solver, and controlling the distributed photovoltaic cluster according to a calculation result; and building the hybrid integer second-order cone planning model according to the active power of the distributed photovoltaic cluster and the running data of the power distribution network so that global optimal solution with low difficulty, high efficiency and high accuracy can be effectively solved. With the distributed photovoltaic cluster control method provided by the technical scheme of the invention, the photovoltaic output fluctuation can be effectively handled, the running safety of the power distribution network is ensured, and local absorption of distributed photovoltaics is achieved. The distributed photovoltaic cluster control method provided by the technical scheme of the invention employs a second-order cone loosing method to convert a non-convex non-linear constraint in power flow constraint to linear constraint in the hybrid integer second-order cone planning model, and the calculation efficiency is greatly improved.

The invention discloses a wind-solar complementary clean heating system integrated with molten salt heat storage and an efficient air source heat pump, and belongs to the field of clean energy use. The efficient air source heat pump is coupled with a molten salt heat storage system for heating, clean wind-solar energy local consumption can be achieved, and environment pollution brought by a conventional heating manner can be reduced. The electric drive air source heat pump is used for achieving wind power efficient use, molten salt energy storage is used for achieving continuous heating of fluctuating wind-solar energy, when wind energy and solar energy are sufficient, through solar energy, molten salt is preheated, wind power further dissolve and heat the molten salt, electric energy andoptical energy are converted into heat energy to be stored, when the wind energy is insufficient, the heat generated by the air source heat pump is insufficient of heating circular return water to rated heating temperature, through regulation of the heat stored in the molten salt heat storage system, the circular return water is reheated, and it is ensured that heating temperature reaches the rated need. Wind-solar energy local consumption can be achieved, and it can be ensured that heating is continuous and reliable.

The invention discloses a local control method for an energy management unit of a household microgrid energy router, and aims to research and develop household microgrid energy router energy management unit equipment for a household microgrid system formed by household photovoltaic power generation equipment, lithium battery energy storage equipment and typical household appliances and for the problems of stable operation, cooperative control and the like of the system. When the commercial power fails, the household microgrid energy router energy management unit equipment is in local linkage with a DC lighting main control unit DCU to execute an MEMS simple scheduling command and allow the most appropriate household microgrid to supply power to the DC lighting LED, and the main-standby complementation of the AC power grid and the household light storage DC microgrid is achieved. The EMU integrates a single-chip microcomputer containing different operation control strategies, provides aset of control logic of the household microgrid in a grid-connected mode, an off-grid mode and a limited mode, achieves household-level microgrid routing energy management scheduling and coordinationcontrol of multi-voltage-level sequence AC/DC bus energy flow, and achieves maximum utilization of photovoltaic power generation.

The invention provides a power distribution coordination control device for two low-voltage transformer areas, and the device comprises a main control module, a data collection module, and a transfer module; the device detects power distribution data in real time, and carries out the transfer control of the power in the two low-voltage transformer areas through the main control module, thereby improving the power supply reliability of a power supply system. The invention further provides a power distribution coordination control method for the two low-voltage transformer areas. The method comprises the following steps: dividing the two low-voltage transformer areas into a first transformer area and a second transformer area, acquiring power distribution data of the two low-voltage transformer areas, and comparing the power distribution data of the two low-voltage transformer areas; enabling the low-voltage transformer area with small load capacity in the first transformer area and the second transformer area to transfer power to the low-voltage transformer area with large load capacity, so local consumption of power in the two low-voltage transformer areas is realized, and the power supply quality of a low-voltage transformer area power supply system and the reliability of system operation are improved.

The invention discloses a load balancing electric automobile low voltage charging network system, and belongs to the technical field of power electronics. According to the invention, the system realizes the low voltage distribution area load balancing by utilizing a low voltage direct current interconnection line, the load is balanced according to distribution transformer capacity, so that the load rate is reduced. The system can realize the on-site elimination of distributed mains power in the low voltage distribution area.

The invention discloses a ginseng plant factory planting and seedling raising system, and ginseng planting method. The seedling raising system comprises: a plant factory building, a factory building roof photovoltaic, an artificial climate environment control unit, seedling raising frames, seedling raising trays, and illuminating lamps. The artificial climate environment control unit comprises an indoor temperature and humidity monitoring module, an indoor heating and cooling air conditioner module, and an indoor ventilation circulation module. A plurality of seedling raising frames which are arranged in parallel are evenly distributed in a plant factory building, each seedling raising frame comprises a plurality of layers of platforms, a plurality of seedling raising plates are arranged on each layer of each platform, and culture medium is arranged in each seedling raising plate. The illuminating lamps are arranged above each layer of each platform. By providing an artificial climate environment control unit that is low in construction cost and provided with a heat preservation structure, the climate in a climate chamber can be accurately controlled, it is guaranteed that production of the ginseng planting system is not affected by a natural environment and seasons, the adverse effect of extreme weather such as high temperature on ginseng growth is avoided, and the standardized standard of the planting technology is achieved.

The invention provides a microgrid control method for multi-energy-flow complementary control. The method comprises the following steps: S1, locally consuming distributed energy of a microgrid; S2, carrying out peak clipping and valley filling of the AC/DC microgrid, and charging and carrying out discharging control through the charging and discharging time periods of a planned curve and the charging and discharging power values corresponding to the charging and discharging time periods according to a planned curve mode; and S3, freely switching between a grid-connected state and an off-grid state of the alternating-current and direct-current microgrid. Coordinated control over sources, networks, loads and storage of substations, data center stations, high-capacity comprehensive energy stations and the like is achieved, the big data mining technology is utilized, the operation strategy is adjusted in real time, the advantages of source, network, load and storage complementation are brought into full play, and the reliability of the microgrid and the comprehensive benefits of a power grid are improved.

The invention provides a simple heat insulation house plant factory coupled with a photovoltaic power generation system and a construction method. The simple plant which is low in cost and provided with a heat insulation structure is constructed, photovoltaic power generation panels are laid on the whole roof area of the roof of the plant, therefore coupling of photovoltaic power generation and the whole area of the plant factory is achieved; the electric quantity generated by photovoltaic power generation is fully consumed by utilizing refined control of energy consumption and power supply of the plant factory; and an energy storage battery with a certain capacity is utilized to maintain circulating power utilization of an air conditioner and a nutrient solution of the plant factory at night, so that new energy photovoltaic power generation is consumed on site, and a peak regulation and frequency modulation auxiliary service signal of a power grid can be responded if the plant factory is connected with the power grid, so that the problems of power grid frequency fluctuation caused by new energy power generation fluctuation load and local consumption of new energy power generation are solved.

The invention belongs to the technical field of electrochemical energy storage application, and in particular relates to an optical storage complementary self-powered warehouse-type energy storage system. An optical storage complementary power generation and supply system is used to provide self-use power for the energy storage system to reduce the cost of electricity. At the same time, a photovoltaic panel array is placed on the top of an energy storage container, which can play the role of sun protection and shade. New energy power supply and energy storage backup power supply of the self-consumption of the warehouse-type energy storage system, local consumption of photovoltaic power generation and the grid connection of surplus power are realized. The shortcomings of temperature rise incontainers, increased scale and power consumption of a temperature control system, and increased hidden dangers of safe operation of batteries of the warehouse-type energy storage system usually placed in the open air are overcome. The use of optical storage complementary power generation increases the use of new energy, prevents and reduces the disadvantage of temperature rise in containers caused by direct sunlight, reduces investment and power consumption, improves efficiency and commercial returns. In addition, a backup power supply is provided when a micro grid is off-grid, which not only saves UPS investment, but also facilitates the realization of black start.