43 results about "Wind power penetration" patented technology

The invention discloses a negative pressure cylinder suitable for marine wind power to penetrate below the seabed, comprising a cylinder with an opening downward, a vertical cylinder at the center of the upper end surface of the cylinder, and an upper end surface of the cylinder on one side of the vertical cylinder. A drain hole communicating with the inside of the cylinder and several evenly distributed water inlet holes are opened on the top, and the lower end of each water inlet hole inside the cylinder is connected with a self-rotating nozzle. The invention also discloses the installation method of the negative pressure cylinder at the same time. By alternately switching the jet pump and the suction pump, the penetration depth of the negative pressure cylinder can be freely controlled within a certain range. At the same time, when the end of the negative pressure cylinder penetrates below the seabed, the seabed soil gradually buries the end due to the scouring of the submarine subsurface flow, so that the effective use of the end greatly improves the ultimate pull-out bearing capacity and overturning resistance of the negative pressure cylinder ability. The negative pressure cylinder makes full use of the reaction force of high-pressure water to realize the self-rotation of the nozzle, which greatly improves the impact range of high-pressure water on the seabed soil and effectively avoids local impact.

The invention relates to a grid wind-abandoning situation analysis method under heat supply period peak regulation constraint. The method is characterized by grasping a wind-abandoning characteristic and rule from a statistic point of view based on wind-abandoning power amount statistic; establishing a heat supply regional power grid scheduling model under a specific power supply proportion structure from a grid operating point of view; analyzing the influence of the peak regulation margin of a cogeneration unit on wind power grid connection space from a peak regulation point of view, quantitatively analyzing wind power penetration rate, and the influence of heat load and electric load ratio on the wind-abandoning admit. The method is scientific and reasonable, good in applicability and good in effect.

The power recovery method and device provided in the present application are applied to power supply control equipment in a power supply system. The power supply control device calculates the adjustment factor of the preset type through the CVaR method according to the obtained predicted wind speed at the target time, the initial wind power penetration rate, and the confidence of the predicted wind speed; adjusts the constraint range of the corresponding constraint condition according to the adjustment factor; Within the constraint range, simulate the power recovery process for the power recovery scheme corresponding to the wind power penetration rate, and obtain the load recovery amount; adjust the wind power penetration rate, and repeatedly execute to obtain the corresponding power recovery scheme according to the adjusted wind power penetration rate The load restoration amount until the wind power penetration rate is equal to the preset maximum wind power penetration rate; at the target time, select the power restoration plan with the largest load restoration amount to restore power to the power load. In this way, through the adjusted constraint range, the flexibility and speed of power recovery are improved.

The invention discloses a control method of active power of clustered wind power plants, which is used for calculating a planned value of active power distributed to each wind power plant, issued by a provincial (municipal) level scheduling mechanism. The method for calculating the distributed active power provided by the invention can determine the active power planned value of each clustered wind power plant in the next control period, and the total capacity of wind power penetration into a power grid is calculated in real time, so that the power of each clustered wind power plant is maximized under the premise that an electrical power system operates safely and stably is guaranteed. According to the invention, many-sided factors such as the change of the total capacity of wind power penetration into the power grid, the current power of each wind power plant, wind power forecast conditions and load forecasting conditions, the planned value of each wind power plant is calculated in the fixed period and is sent to each wind power plant, the planned value is an upper limit value, the wind power plant can freely generate electricity when the current value is below the planned value, and an application is needed when the current value is above the planned value. According to the invention, the generating efficiency of the wind power plants is improved furthest, and wind power penetration into the power grid system is maximized.

In order to study the frequency modulation capability of supercritical units in areas with high wind power penetration rates, the invention provides a simulation method for frequency modulation of two-area systems in which supercritical units participate in wind power consumption, which belongs to the field of simulation analysis of supercritical units. The present invention includes: Step 1: Establish the coordinated control system and mechanism model of supercritical units, wind turbines and subcritical units, and observe the frequency difference and main steam parameters of each mechanism model under the condition of only one frequency regulation and no secondary frequency regulation control effect, debug the ratio parameters in the coordinated control system, and determine the mathematical transfer functions of supercritical units, wind turbines and subcritical units; Step 2: Establish the frequency modulation model of the two-area power system according to the mathematical transfer functions. Area A includes Supercritical units, wind turbines and subcritical units, area B only includes subcritical units, and frequency synchronization between area A and area B; Step 3: Use the established frequency modulation model and measured data of the two-area power system for simulation and analysis.

A distribution system optimization operation method that considers the high penetration of distributed wind power grid-connected. In the case of wind farm output and load fluctuations, the reactive power adjustment capability of wind turbines is fully utilized to control the system node voltage at a safe and high-quality level. Within the scope, the phenomenon of wind turbine off-grid caused by voltage quality problems is solved; compared with the existing power distribution system optimization model that generally targets economy The goal is to ensure that the active power generated by the wind farm is fully connected to the grid for consumption, and to achieve a high degree of penetration and efficient utilization of wind power resources.

The invention discloses a method for calculating the optimal admitting ability for wind power multipoint access of a regional power grid and belongs to the technical field of wind power penetration methods of the power grid. The method for calculating the optimal admitting ability for the wind power multipoint access of the regional power grid comprises the steps that the installed capacity of all wind power plants is initialized, and data such as the local wind speed are acquired; the output condition of all the wind power plants is calculated, and unit commitment and optimization within all dispatching cycles are conducted, so that an annual unit commitment mode of an electric power system comprising the wind power plants is obtained; power flow calculation is conducted based on each period of time, whether an operation constraint condition of the system is met is verified, and a final objective function value is calculated after simulation is conducted on the system for more than 8760 hours; the installed capacity of the wind power plants is updated, optimized iteration is conducted on an objective function, and optimal solution of the wind power generating capacity is achieved, namely the optimal admitting ability of the power grid which enables the economical efficiency of the system to be optimized on the premise that the safety and stability constraint conditions are met is achieved. According to the method for calculating the optimal admitting ability for the wind power multipoint access of the regional power grid, an optimal wind power admitting capacity calculation model with the largest net earning of a wind power plant and power grid combination system (with the environmental benefit considered) as the purpose is established, and suggestions can be provided for the proper establishment of the installed capacity of the regional wind power plants.