66results about How to "Increase annual power generation" patented technology

The invention relates to a yaw control method for a large-sized wind powered generator unit. A current yaw angle reference value alpha reference is obtained according to a current wind direction, a current yaw angle practical value alpha practice is obtained by a encoder or a tachometer, a yaw angular error delta alpha is obtained by subtracting the yaw angle practical value alpha practice by the current yaw angle reference value alpha reference, and a corresponding yaw mechanism control rule is calculated by integrating the yaw angular error delta alpha and the variation tendency thereof by a fuzzy controller. Furthermore, an obtained electrical signal of the yaw mechanism control rule is sent to a yaw actuating mechanism to control a propeller pitch angle, and the yaw angle of the wind powered generator unit traces the yaw angle reference value alpha reference to enable the yaw angle practical value alpha practice and the yaw angle reference value alpha reference of the wind powered generator unit to be kept consistent. The invention obviously enhances the total precision, is favorable to increasing the year total generated energy of the wind powered generator unit, has high adaptability for complex and extreme cases, greatly enhances the operating effectiveness, furthest prolongs the mechanical life of the yaw actuating mechanism, and also has low remodel difficulty and low cost.

The invention relates to a centralized and remote control monitoring, and fault diagnosis system of wind turbine. Various sensors sample an original signal from a wind turbine; the signal obtained by the various sensors is converted into a digital signal by a data conversion module and conveyed to a site controller, the data processed is conveyed to a host computer; and two manners including centralizing and remote controlling are included. Accident alerting program software in the computer analytically analyzes and judges testing data, and draws a conclusion to alert an accident; and fault diagnosis specialist program software in the computer analyzes the testing data, draws a diagnosis conclusion and displays the conclusion in text on the display. Online monitoring on comprehensiveness of key parameters of all important parts of the whole wind turbine is realized; the accident alerting program software is used to analyze and judge the testing data to draw a conclusion and alert an accident; and the fault diagnosis specialist program software is used to diagnose operation condition, thereby improving operation safety reliability and service life of a large-sized wind turbine and enhancing the operation quality of a wind turbine.

The invention discloses a real-coded genetic algorithm-based optimizing method for the micrositing of a wind power station. In the method, the measured wind speed in the wind farm is corrected by an index model in the direction of relative height; a power characteristic curve of a wind machine is discretized by a linearized method; for the wake flow of the wind machine, a linearized wake flow model is adopted; the wind speed of the wind machines at the wake flow of a plurality of wind machines is solved by a method of the summation of squared differences, when part of the wind machines are positioned in the wake flow, the wind speed is revised by a method of area coefficients; based on an optimizing target function of the micrositing in the design of the wind power station, when the total number of the wind machines in the wind power station is determined, the total generated energy is used as the target function, and when the total number of the wind machines in the wind power station is not determined, the kilowatt-hour cost is used as the target function; and the microcosmic arrangement site of each wind machine in the wind power station is obtained by the real-coded genetic algorithm-based optimizing method. By the method, the reliability of forecast is high, the optimizing efficiency is high and results are accurate.

The invention relates to a solar energy photovoltaic power generation application, particularly a hybrid photovoltaic generating system which mainly adopts grid-connected power generation but also can carry out off-grid power generation. The generating system comprises a controller, a solar cell array, a storage battery, a direct current emergency load, a grid-connected inverter and a public distribution network. Most direct current electric energy output by the solar cell array is converted into alternating current electric energy through a grid-connected inverter and then sent to the public distribution network; and small part of direct current electric energy is supplied to the direct current emergency load and the storage battery through a direct current buck converter and a low-voltage direct current bus. When the voltage of the low-voltage direct current bus is beyond the normal range, the storage battery can supply energy to the direct current emergency load through a charge-discharge controller. The grid-connected and off-grid hybrid solar energy photovoltaic generating system mainly adopts grid-connected power generation but also can carry out off-grid power generation; even when the public distribution network fails and grid-connected power generation is not available, the system also can supply energy to the direct current emergency load, thus improving the system efficiency and the annual generating time, and having a good application prospect.

The invention provides a propeller pitch variation control method for a large-sized wind powered generator unit. The method comprises the following steps: a rotating speed error delta omega is obtained by subtracting the practical rotating speed omega practice of a current main bearing by the rotating speed expected value omega expectation of the current main bearing, a corresponding propeller pitch angle reference value beta reference is calculated by integrating a rotating speed difference delta omega and the variation tendency by a fuzzy controller, the propeller pitch angle reference value beta reference is transmitted to the wind powered generator unit which realizes the control of the propeller pitch angle for a propeller pitch variable actuating mechanism, and the pneumatic shape of a changed propeller pitch angle blade is changed so as to enable the bearing force of the changed propeller pitch angle blade to be changed and the rotating speed of the wind powered generator unit to trace the rotating speed expected value omega expectation. The propeller pitch variation control method obviously enhances the total precision, is favorable to increasing the annual total generated energy of the wind powered generator unit, has high adaptability for complex and extreme cases, greatly enhances the operating effectiveness, furthest prolongs the mechanical life of the propeller pitch variable actuating mechanism, and also has low remodel difficulty and low cost.

The invention discloses a wind generating set and a method and device for controlling power of the wind generating set. The method includes the steps that the current running environment temperature is compared with the preset environment temperature range; whether the wind generating set is in a normal working state or not is judged; when the current running environment temperature is larger than the rated maximum value in the preset environment temperature range and smaller than the practically-required maximum value in the preset environment temperature range and the wind generating set is in the normal working state, capacity reducing control is conducted on the wind generating set according to the output power, corresponding to the current running environment temperature, in the preset high-temperature capacity reducing control table; and when the current running environment temperature is smaller than the rated maximum value, required by capacity increasing, in the preset environment temperature range and the wind generating set is in the normal working state, capacity increasing control is conducted on the wind generating set according to the output power, corresponding to the current running environment temperature, in the preset low-temperature capacity increasing control table.

The invention relates to an eddy generator for a wind turbine blade. The eddy generator comprises multiple fins, and each fin is a triangular plate part with a circular corner as a top corner. According to the eddy generator, stalling can be effectively delayed, the pneumatic performance of the blade is improved, the situation can be reduced that the power generation loss of a wind turbine is caused by blade surface pollution, and the eddy generator can be applied to power increase transformation of the wind turbine blade which is operated. The invention further relates to a method for determining the mounting position of the eddy generator on the wind turbine blade and a method for installing the eddy generator on the wind turbine blade. According to the methods, the mounting and positioning process is precise and reliable, and the mounting efficiency is high.

A solar cell module 60 has a plurality of solar cells 14 having a plurality of parallel grooves 8 on the individual light-receiving surfaces thereof, each of the grooves having an electrode 5 for extracting output on the inner side face (electrode-forming inner side face) on one side in the width-wise direction thereof; and a support 10, 50 for supporting the solar cells 14 in an integrated manner so as to direct the light-receiving surfaces upward. The annual power output can be increased by adjusting the direction of arrangement of the electrode-forming inner side faces of the grooves 8 while taking the angle of inclination β of the light-receiving surface of the individual as-installed solar cells 14 relative to the horizontal plane and the latitude δ of the installation site of the solar cell module into consideration.

The invention relates to the technical field of wind turbine siting in a wind power plant, in particular to a wind turbine micro-siting device and a wind turbine micro-siting method based on binary coded genetic algorithm. The wind turbine micro-siting device has the structure that a camera device is connected with a CMOS (Complementary Metal Oxide Semiconductor) image sensor which is connected with an image processing chip, and the image processing chip is connected with an SPCE (Screen Printed Carbon Electrode) 0161A singlechip microcomputer; and an air velocity transducer is connected with an A/D (Analog to Digital) converter which is connected with a 89C51 singlechip microcomputer. The wind turbine micro-siting device and the method are suitable for wind turbine siting in both places with flat terrains and places with complex terrains. The wind turbine micro-siting device and the method have the advantages that target optimization is diversified, the investment cost of the wind power plant is small and the economic benefit is high; and the annual electric power output of the wind power plant is remarkably improved.

The invention provides a control method for a stall-controlled wind turbine generator system. According to the method, conversion from constant-speed and fixed-propeller type control to variable-speed and fixed-propeller type control is completed by adding a full-power converter to be matched with a control system; a wind speed-power curve and a rotation speed-torque control curve of an improved control system are obtained through calculation so that the maximum wind energy utilization coefficient of the wind turbine generator system can be realized at a low wind speed within a wide rotation speed range; the system conducts active control at a high wind speed, and good economy on improving the generating efficiency of the stall-controlled wind turbine generator system is realized.

The invention aims to provide a mechanism capable of automatically removing accumulated snow from a solar panel. A resistance wire is coated, printed or arranged by using a back packaging material of the solar panel, a self-contained storage battery of a system or a mains supply can be used during snow accumulation, the snow on the surface of a battery module is melted by heating the resistance wire, and most accumulated snow automatically slides under the influence of gravity by using the characteristic that the solar panel is obliquely arranged, so that the aim of removing the accumulated snow is fulfilled. The mechanism is applied to the solar panel, so that the phenomenon that generating capacity is reduced due to snow accumulation in a high-latitude area in winter is avoided, annual total generating capacity can be improved, and investment benefits are improved. The mechanism can be used on all kinds of solar panels including monocrystalline silicon and polycrystalline silicon solar panels and various thin film solar panels.

The invention discloses a novel vortex generator for a wind turbine blade. The vortex generator comprises a fin body, wherein the fin body is of a back fin structure and is symmetrical relative to thelongitudinal cross section of the fin body; the middle longitudinal section is parallel to the flow direction from the leading edge to the trailing edge of the airfoil section of the wind turbine blade, so that the projection area of the fin body in the direction perpendicular to the flowing direction is reduced, and then the shape resistance is reduced. According to the vortex generator, the bionic design is adopted, and the back fin-shaped fin body has relatively small flow resistance. The middle longitudinal section of the back fin is parallel to the flow direction from the leading edge tothe trailing edge of the airfoil section of the wind turbine blade, compared with the prior art, the fin body has the advantages that the projection area is small in the direction perpendicular to the flow direction of the airflow, and the shape resistance is small. When the airflow flows through a groove, a high-energy flow direction vortex can be induced at the groove and at the edge of the groove, so that the energy in the boundary layer can be increased, and the flow separation is inhibited.

The embodiment of the invention provides an anemometer fault-tolerant control method and device, and a wind power farm controller. The anemometer fault-tolerant control method comprises the steps thatone or more adjacent wind generating sets corresponding to each target wind generating set are determined according to the wind speed correlation coefficient between every two wind generating sets ina wind power farm; set identification corresponding to one or more adjacent wind generating sets and the wind speed correlation coefficient between each adjacent wind generating set and the corresponding target wind generating set are sent to the target wind generating set; and instantaneous wind speed information of each of one or more adjacent wind generating sets corresponding to a faulty windgenerating set is sent to the faulty wind generating set subjected to anemometer fault. By conducting redundancy on the anemometer fault, the annular generating capacity can be increased, and set safety can be ensured.

The invention discloses a device for controlling loading and deformation of a wind turbine blade. The device is characterized in that the tip of the wind turbine blade is provided with a free rotation-type blade with proper length; a steering engine in the free rotation-type blade is connected with a control plane at the rear through a drive rod; the control plane is driven by the steering engine to rotate, and therefore the aerodynamic configuration of the free rotation-type blade is changed; the free rotation-type blade rotates around the wind turbine blade under the action of aerodynamic moment to change an angle of attack between the free rotation-type blade and incoming flow, and therefore the aerodynamic loading and deformation of the wind turbine blade are controlled. The device disclosed by the invention is broader in application range, and certain modification is performed on the traditional mature commercial wind turbine blade; not only is the precious time saved and the cost of redevelopment reduced but also the aerodynamic performance of the wind turbine blade under different working conditions can be improved; the output power of a wind turbine under different incoming flow conditions is stabilized; the working envelope of the wind turbine is enlarged, and therefore the annual energy output of the wind turbine is advantageously increased, and the safety of the blade and related equipment is also enhanced.

The invention discloses a vortex generator, a fan blade and a manufacturing method of the fan blade. The vortex generator comprises at least one pair of grooves formed in the blade, and when airflow flows nearby the groove, high-energy vortex is generated under the function of the groove and flows downstream to disturb airflow on the upper surface of the blade. The vortex generator has the main functions of a current vortex generator, can generate enough vortex disturbance to restrain the flowing separation of the wing section surface, improves the lift-drag ratio of a wing section, improves the pneumatic performance of the blade, reduces the flowing noise of the blade, increases the annual energy output of a wind driven generator, and has the characteristics of being low in cost, high inreliability and the like.

The invention discloses a mounting frame and a support of photovoltaic components and a mounting method thereof. Required mounting angles of the photovoltaic components are adjusted by adjusting threaded hole connecting positions of support rods and connecting rods in the front and rear rows, two crossbeams penetrate connecting barrels at the upper end of the support rods from left to right or from right to left so as to sequentially connect the support rods in the front and rear rows, the photovoltaic components are fastened in first fastening grooves of a long frame body and second fastening grooves of a short frame body respectively and are adhered by silica gel; the two adjacent photovoltaic components are connected to each other via cant beams; the crossbeams are connected with two crossbeam connecting barrels at two ends of the bottom of the long frame body, and after the photovoltaic components are assembled, the photovoltaic components are fixedly connected with the threaded ends of the crossbeams and the cant beams via nuts. The mounting frame has high mechanical strength and stability, long-term and reliable running of the integral photovoltaic system can be guaranteed; mounting and detachment are facilitated, inclined mounting angles of the photovoltaic components can be adjusted at any time according to solar irradiance of seasonal variation, and accordingly, annual energy output of the photovoltaic components is increased.

The invention discloses an artificial airflow power generating method and an artificial airflow power generating system. The system comprises a column casing of which the two ends are provided with an air inlet and an air outlet, wherein the column casing is a single column casing, a string of column casings or a column casing group consisting of multiple column casings which share one air inlet; the column casing group is provided with one or multiple shared air outlets; the room-temperature air naturally absorbed into the column casing from the air inlet is heated, cooled or heated firstly and then cooled in the column casing; a passage through which airflow positioned at the air inlet flows into the column casing or an airflow passage which is between the air inlet and the air outlet and is adjacent to one side of the air inlet is provided with a device capable of converting airflow energy into mechanical energy and electric energy; and driven by the airflow naturally absorbed into the column casing, the device realizes power generation. The method and corresponding system disclosed by the invention are wide in application range and lower in cost and are suitable for being applied to industrial production and commercial operation. The invention also discloses a wheel-shaped wind impeller which has extremely high airflow energy-mechanical energy conversion efficiency and can be matched with the method and the system for use.

The invention relates to the field of wind turbine rotation speed and output power regulating control devices, and discloses a wind turbine wind pressure variable-pitch whole-process control device, which comprises a hub, a paddle and a variable-pitch actuator. The variable-pitch actuator comprises a variable-pitch device base, a pull rod, a synchronous plate and a shear elastic force balance unit; the variable-pitch device base is fixed on the left end face of the hub; a guide pipe is arranged on the variable-pitch device base; the synchronous plate is arranged on the guide pipe; the shear elastic force balance unit comprises a fixed support I, a fixed support II, a pressing rod I, a pressing rod II and a balance spring. The wind turbine wind pressure variable-pitch whole-process control device provided by the invention is applicable to a small wind turbine, can realize whole-process automatic regulating control on variable-pitch from 0 to 90 degrees during wind turbine operation, and can carry out automatically feathering halt without the need for watching over and maintaining when disastrous gale (larger than 25m/s) occurs; the wind turbine provided with the device is wide in adaptive wind speed range, can efficiently, stably and safely operate within the working wind speed range (3 to 25m/s), and is low in noise and high in annual energy output.