5results about How to "Reduce configuration capacity" patented technology

The invention provides a micro-grid peak clipping and energy storage optimization method and optimization system, and belongs to the technical field of micro-grids, and the method comprises the steps: analyzing the project general situation, predicting the energy consumption data of a charging field, building a photovoltaic system peak clipping model, calculating the peak operation power of each time period, determining the total energy storage reduction power, and carrying out the peak clipping according to the peak clipping demand, the charging and discharging depth, the battery efficiency and the PCS efficiency. Calculating the required capacity of an energy storage battery, selecting a proper energy storage device, carrying out peak clipping, releasing energy in a residual electricity peak electricity price period, formulating an operation strategy, and realizing dynamic peak clipping; power supply and power utilization loads in the micro-grid system are always in a balanced state, and the problem that the service life of a transformer is affected due to voltage fluctuation, current overload and the like is avoided.

The present application provides a method for configuring the capacity of a power electronic grid-building converter based on grid strength constraints, and relates to the technical field of power system planning. The configuration method includes: evaluating the strength of the grid; judging whether the equivalent inertia time constant of the grid, the short-circuit ratio of multiple stations at the grid-connected point of new energy, and the short-circuit ratio of multiple stations at the end of new energy machines are respectively less than the preset minimum grid inertia time constant requirement value, the minimum requirement value of the short-circuit ratio of multiple stations at the grid-connected point of new energy, and the minimum requirement value of the short-circuit ratio of multiple stations at the end of new energy machines; performing grid compensation on the lowest point of the short-circuit ratio of multiple stations at the grid-connected point of new energy and / or the short-circuit ratio of multiple stations at the end of new energy machines, and determining the first capacity of the power electronic grid-building converter required to be configured; when the capacity of the power electronic grid-building converter meets the safety and stability standards, determining the second capacity of the power electronic grid-building converter required to be configured, and determining the capacity of the power electronic grid-building converter required to be configured in the end according to the first capacity and the second capacity.

This invention discloses a cascaded synchronous aging topology and control method for half-bridge modules. The topology includes at least one aging basic unit, which consists of two half-bridge modules connected back-to-back. The first half-bridge module operates in BOOST mode, and the second half-bridge module operates in BUCK mode. Each half-bridge module includes a power switch and a bus capacitor. The DC input ports of the first and second half-bridge modules are connected via switching devices. The input of each aging basic unit is connected to a DC source, and the output is connected to a DC feedback load. Adjacent aging basic units are connected via a voltage regulator and an inductor. This invention achieves consistent operating conditions for multi-module cascaded aging by optimizing the topology and precisely controlling the duty cycle and carrier phase. It also adds a fault protection mechanism to prevent fault propagation, reduces the number of contactors used, and lowers control complexity and equipment costs.

The present invention discloses a composite energy storage control method based on a variable frequency air conditioner and an energy storage battery. The method comprises the following steps: calculating the equivalent heat capacity and equivalent thermal resistance of the room according to the characteristics of the room where the variable frequency air conditioner is installed; using a first-order equivalent thermal parameter model to process and obtain the real-time temperature in the room; establishing a functional relationship between the working frequency, operating power and real-time temperature of the variable frequency air conditioner, and processing and obtaining the operating power of the variable frequency air conditioner; calculating the available capacity and real-time power of the virtual energy storage; using the room equivalent thermal model, processing and obtaining the discrete response power provided by the virtual energy storage; combining the virtual energy storage and the energy storage battery to form a composite energy storage, and controlling the charge state of the composite energy storage. The present invention uses a variable frequency air conditioner and an energy storage battery to form a composite energy storage, which increases the capacity of the energy storage, reduces the cost of the energy storage, increases the power of the energy storage, and extends the service life of the energy storage battery, effectively responding to the continuous increase in the penetration rate of renewable energy.

The invention provides a reverse power flow processing method and a cut-through power supply traction power transformation system, and is applied to the cut-through power supply traction power transformation system, and the method comprises the steps: determining the operation condition of the cut-through power supply traction power transformation system according to the current information of one or more traction substations in a plurality of traction substations; determining an adjustment strategy corresponding to the operation condition, and obtaining adjustment parameters required by the adjustment strategy; and according to the adjustment strategy, controlling corresponding equipment in one or more traction substations in the plurality of traction substations to work according to the adjustment parameters. In the working process of the through power supply traction power transformation system, the operation condition of the traction substation is determined according to the current information of the traction substation, and the corresponding adjustment parameters are determined according to the operation condition of the traction substation, so that the corresponding equipment is controlled to work according to the adjustment parameters; the ride-through power generated by the traction substation can be reduced, and the system stability is improved.