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3251 results about "Wind driven" patented technology

Wind Driven Rain is an illusive definition that is almost as illusive as the payments received by your insurance company from damages resulting from it. Simply put, wind driven rain is damage caused by rain that comes through an opening being propelled by wind or wind driven.

System simulation method for connecting large-scale wind power into power grid in centralization way

The invention proposes a system simulation method for connecting large-scale wind power into a power grid in a centralization way and an effective equivalent mode of a high-capacity wind power station. Based on the synchronization operating characteristics of the large-scale wind power, the invention makes the large-scale wind power synchronization simulation analysis principle under the comprehensive consideration of the influences of the wind resource characteristics of wind power generation, the dynamic response characteristics of a wind driven generator and the differentiation characteristics of different types and different control modes of various wind driven generators and the like; therefore, the invention constructs the complete analytical framework and flows of the system simulation assessment with the large-scale wind power being connected into the power grid. The simulation analysis result shows that the system simulation method can comprehensively, objectively and accurately assess the impact and the safety bottleneck to the stable running of a power system caused by wind power synchronization after the base synchronization of the large-scale wind power due to the affection to the dynamic response characteristics of the power system by the differentiation of the types and the response characteristics of various wind driven generators and the wind resource characteristics. Therefore, the method is beneficial for the scheduling and operating staff to accurately grasp the affection to the system characteristics by the connection of the large-scale wind power and the law of the connection of the large-scale wind power, and has significant meaning for instructing and making the corresponding precautionary and improved measure and ensuring the normal running of the system after the connection of wind power.
Owner:CHINA ELECTRIC POWER RES INST +1

Distributed power source contained power system multi-target reactive-power optimization method

The invention discloses a distributed power source contained power system multi-target reactive-power optimization method in the field of power system reactive-power optimization. The technical scheme includes: 1, deducing a model of a wind-driven generator in power flow calculation; 2, initializing power grid parameters and grid-connected parameters of a distributed power source; 3, constructing an individual vector formed by system reactive-power optimization control variables, and initializing species; 4, performing the power flow calculation according to the initialized species and grid parameters after grid-connection of the distributed power source, and calculating objective function values; 5, performing multi-target optimization by utilizing the harmony search hybrid algorithm based on artificial bee colony; and 6, finishing the optimization process and outputting optimized results. The distributed power source contained power system multi-target reactive-power optimization method is a hybrid optimization algorithm ABS-HS which integrates the advantages of global search of the artificial bee colony (ABC) algorithm with local search of the existing harmony search (HS) algorithm, so that efficiency and robustness of the algorithm are improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Optimizing method of independent microgrid system

The invention discloses an optimizing method of an independent microgrid system which comprises diesel generators, a wind driven generator, a photovoltaic array and an energy storage battery. The optimizing method specifically comprises the steps of: considering a coordination control strategy among a combined starting mode of multiple diesel generators, the energy storage battery and the diesel generators on an optimizing plan designing model by an independent microgrid system-based multi-target optimizing design model to ensure that the utilization rate of renewable energy resources in the independent microgrid system is higher and the independent microgrid system is more economic and more environment-friendly in operation; aiming at the stability of the optimizing plant designing model of the system, considering the standby capacity of the stability demand of the independent microgrid system; and carrying out multi-target problem solving by adopting an NSGA-II (Nondominated Sorting Genetic Algorithm II)-based multi-target genetic algorithm on the basis of a solving algorithm of the optimizing plant design model so as to realize multi-target optimization of economy, reliability and environment friendliness of the independent microgrid system.
Owner:ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1

Gear box vibration damping supporting method and device for wind-driven generator group

The invention relates to a wind power generator group gear box oscillation damping support method and an oscillation damping support device thereof. A floating support manner is used for putting the stretching arm of the wind power generator group gear box into a square hole-shaped frame typed oscillation damping support base, and the stretching arm is fixed between an upper elastic body and a lower elastic body of the frame typed oscillation damping support base, thus leading the stretching arm to be in floating and elastic support state between the two elastic bodies. And the oscillation damping support device comprises the oscillation damping support base and oscillation damping elastic bodies installed in the oscillation damping support base; the oscillation damping support base has the fame typed structure; the square hole-shaped frame is composed of a U-shaped frame and a beam; an upper oscillation damping elastic body and a lower oscillation damping elastic body are respectively arranged at the upper and the lower part inside the square hole-shaped frame. The stretching arm of the wind power generator group gear box is arranged between the upper oscillation damping elastic body and the lower oscillation damping elastic body, thus forming elastic floating support.
Owner:ZHUZHOU TIMES NEW MATERIALS TECH

Novel floating type multi-floater wind-wave energy hybrid power generation device

The invention provides a novel floating type multi-floater wind-wave energy hybrid power generation device which comprises a wind driven generator, a floating foundation platform, a wave energy capture device and connecting structures between floating bodies, wherein the wind driven generator comprises blades, a hub, a cabin and a tower; the floating type foundation platform is a semi-submersible type and is located on the sea surface by an overhung anchor chain line; the wave energy capture device comprises floaters and an energy capture (PTO) system, and the axial relative movement between the wave energy floaters and stand columns of the foundation platform under the action of wave energy is utilized to drive the PTO system to generate electric energy; and each connecting mechanism comprises a guide rail and a U-shaped wheel, and can enable the platform and the wave energy floaters to produce axial relative movement only. The novel floating type multi-floater wind-wave energy hybrid power generation device can realize the purpose of joint power generation of offshore wind energy and wave energy by utilizing mechanical energy possessed by offshore air and wave, and is good in stability, wide in applicable water depth scope, high in power generation efficiency, simple in structure form and reliable in power generation mode.
Owner:HARBIN ENG UNIV

Coordination control method for double-fed asynchronous wind driven generator high voltage ride through

The invention discloses a coordination control method for double-fed asynchronous wind driven generator high voltage ride through, on the basis of a mathematical model of a double-fed asynchronous wind driven generator and gird side and rotor side converters of the double-fed asynchronous wind driven generator, allocation principles of active and reactive power of the grid side and rotor side converters of the double-fed wind driven generator are calculated, extremity expressions of active and reactive current are given, and a high voltage ride through implementation scheme capable of effectively providing dynamic reactive support for a power grid and eliminating direct current bus voltage, active power, reactive power and electromagnetic torque ripples is provided. The coordination control method in the invention can overcome defects of weak ride through capability and poor power grid stability of a wind driven generator in the prior art, thereby achieving the goal of optimal control of the generator when the power grid voltage is high; and the method can perfectly be implemented on the basis of original low voltage rid through hardware, thereby realizing joining with an existing low voltage ride through scheme of the unit, and forming a generalized voltage fault ride through control strategy capable of coping with a sudden change of amplitude of network voltage.
Owner:ZHEJIANG UNIV

Special tri-level full-power converter set for large power wind-driven generator

The invention discloses a special tri-level full-power converter set for a large power wind-driven generator, which comprises four groups of tri-level rectifiers, and is characterized in that an electric grid-side converter is of two groups of tri-level inverters, the four groups of tri-level rectifiers are respectively connected with four groups of separated three-phase windings of a generator, two groups of tri-level rectifiers which are connected with two groups of three-phase windings with the phase difference of 180 degrees of the generator are connected with each other in parallel, the rectifier groups after being connected with each other in parallel are connected with each other in serial and are connected with two groups of tri-level inverters in parallel connection, and finally the rectifier groups are connected with the electric grid. Four groups of Vienna rectifiers are used for sharing the power, since the Vienna rectifier is of a tri-level converter, the harmonic wave and loss performance thereof are better than that of two-level converter; in addition, each group of Vienna rectifiers only requires three IGBT modules, and the traditional two-level converter requires six IGBT converters, so the reliability of the Vienna rectifier is high. Two groups of tri-level inverters are adopted at the side of the electric grid to be connected with each other in parallel, so the pulse of neutral point potential is neutralized by two groups of converters in parallel connection through the phase reversal design of the transformer.
Owner:新疆全新良时科技有限公司

Low voltage traversing control method for wind power generation set grid-connection current transformer

The invention provides a method for controlling low-voltage ride-through of the grid-connected converter of a wind-driven generating set. On the basis of back-to-back voltage or current-typed grid-connected converter, a motor-side converter detects the middle direct current voltage; a voltage adjuster controls the middle direct current voltage to follow with the middle direct current voltage instruction value; a torque adjuster controls the practical torque to follow with the torque instruction value; an active power adjuster controls the grid-side converter and leads the grid-connected active power to follow with the active power instruction value. The transfer of the dump energy is realized by the coordinated control of the motor-side converter and the grid-side converter, elements such as additional resistance and the like are not required so as to consume the rest energy, thus ensuring that the wind-driven generating set does not run without the grids during the falling period of the network voltage at the access point. The method improves the efficiency of the unit, reduces the energy loss, simplifies the structure of the system, reduces the volume of the device, reinforces the compactness of the structure and reduces the cost of the device.
Owner:BEIJING NEGO AUTOMATION TECH
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