49results about How to "Enough capacity" patented technology

The invention relates to an H-bridge cascaded multilevel voltage sag generator based on an insulated gate bipolar transistor (IGBT). The generator is characterized in that the generator is an energy feedback four-quadrant converter and can realize bidirectional energy flow; an input end of the generator is connected with a power grid, and an output end of the generator is connected with a system under test (SUT); the energy feedback four-quadrant converter is formed by connecting one phase with three-phase Y, wherein the one phase is formed by overlaying a plurality of low-voltage H-bridge frequency conversion power units in series, and the energy feedback four-quadrant converter is connected with a wind power generation system or photovoltaic system under test; rectification sides of theH-bridge frequency conversion power units are triphase controlled full bridges of IGBT controlled devices, and the triphase controlled full bridges are used for charging filter capacitors after beingrectified; and output sides of the H-bridge frequency conversion power units are composed of four contravariant IGBT controlled devices. The generator provided by the invention not only outputs the voltage sag waveform of the power grid specified in Technical Rule for Connecting Wind Farm to Power Networks, but also freely sets other sag depths and times. The generator is low in self loss, and can carry out research and analysis on trends and reactive power.

The invention discloses a wind turbine generator system alternating current variable pitch system backup power supply capacity detection method. The wind turbine generator system alternating current variable pitch system backup power supply capacity detection method comprises the steps that a capacity testing mode is turned on; a speed and a position of a current blade are changed by a master control command; an initial voltage value of a current backup power supply during testing is recorded; when the test is ended, the lowest working voltage value and the testing time value of the current backup power supply are recorded; the energy value provided by the backup power supply and an energy consumption value of a driving motor are calculated; the ratio between the energy consumption value of the driving motor and the energy value provided by the backup power supply is used as a testing result, and whether the current backup power supply capacity is abnormal is determined according to the testing result. The method provided by the invention is advantageous in that remote operation is realized, and when the backup power supply capacity is lower than a normal operation range of a device, a wind turbine generator system electric control system is used to determine whether a backup power supply module group is required to be replaced, and therefore the backup power supply is guaranteed to be provided with the enough capacity to satisfy a requirement of emergency feather; the measurement is simple, the testing period is short, and the testing is convenient.

The invention discloses an energy storage equipment voltage balance method. The method comprises the steps that when the voltage difference of a single power source in a series-connection (power source) energy storage equipment unit reaches a set value, after the high-voltage single power source and other one or more single power sources are in series connection, a flying capacitor is charged, the voltages of the high-voltage single power source is lowered, then the low-voltage single power source is charged by a plurality of flying capacitors which are in series connection, the voltage of the low-voltage single power source is improved, and so repeatedly, voltage balance of energy storage equipment is achieved. The invention further discloses a voltage balance system using above method. According to the energy storage equipment voltage balance method and system, supercapacitors which are in series connection are used as flying elements, the problem that traditional voltage differences are too small is solved, the requirement for large-power charging and discharging is met, sufficient capacity can further be provided, and the energy transferring efficiency is improved. According to the energy storage equipment voltage balance method and system, circuits are simple, balance currents can be adjusted and balanced according to the number of the flying supercapacitors needing to be in combined series connection, and the flexibility of control is improved.

The present invention relates to a beverage boiling machine with a water storage container (1), sensors (5, 6) for detecting liquid level of the water storage container (1) and a display device (20) for displaying liquid level detected by the sensors (5, 6), it extends into liquid level in the display device (20) displaying as spare cup amount (21) based on the corresponding existing water quantity.

The invention discloses a digital watermarking method capable of resisting a printing scanning attacks based on fused fonts. The method specifically comprises the following steps: constructing a common Chinese character font library and a Chinese font library; Determining a font of the target document; Carrying out style migration on the source font picture and the target font picture of the Chinese characters in the common Chinese character library through the CGAN to generate a new font picture set; Screening the new font picture set to prepare a font image library; And according to the to-be-embedded information, finding out a target new font picture from the font image library, and replacing the to-be-replaced Chinese character in the original document. According to the method, different fonts are fused, the fonts most similar to the original document fonts are selected for Chinese character replacement, multi-bit information can be embedded into one Chinese character, the watermark information amount hidden in one document is greatly increased, and the problems that robustness is poor, the capacity is small and the like due to the fact that digital watermarks are added in a space domain in the prior art are effectively solved.

The invention discloses an emergency real-time sensing system of a large centralized power customer service center and a construction method. The emergency real-time sensing system comprises a data acquisition module, a text data processing module, a feature vector construction module, a multi-document theme analysis module, an event sensing module and a result pushing module. According to the invention, work order data is accepted based on massive customer service center businesses; based on Apache Flink, LDA, TextRank and other technologies and algorithms, an emergency real-time perception method is constructed, automatic processing of text information of a customer service center and emergency convergence are achieved, automatic identification of emergencies is achieved, and the blank of the business requirement is filled.

Positive electrode active material particles according to the present invention each having a layered rock salt structure and being represented by compositional formula (LiGammaXe)(NiaCobXcZd)O2 (in the formula, X represents a divalent metallic element optionally substituted with a Li site, Z's represent metallic elements at least including Al and / or Mn but excluding X, and 0.93<=Gamma<=1.15, 0.82<=a<=1.00, 0<=b<=0.12, 0.001<=c+e<=0.040, 0<=d<=0.10, and a+b+c+d=1 are satisfied) help maintain battery capacity at a sufficient level, and exhibit high cycle characteristics and excellent thermal stability.

Disclosed is a lens-fitted photographic film unit containing a roll of unexposed photographic film. The lens-fitted photo film unit uses a specific battery of a different size or shape from conventional standardized batteries. A hollow protrusion is formed in a battery holding room. A hollow of the hollow protrusion joins with a dark room for the photographic film. If the hollow protrusion is cut away with the intention to put a conventional battery in the battery holding room, the light-tightness of the dark room is destroyed. When a cartridge chamber bottom lid is opened to remove a film cartridge, an interconnection lever transmits the opening movement of the lid to a sliding plate. Then the sliding plate turns a charge switch of a flash circuit ON, and locks the charge switch in the ON position.

The invention discloses an energy storage equipment voltage balance method. When the voltage difference of single power sources in a series connection (power sources) energy storage equipment reaches a set value, high-voltage single power sources and a flying supercapacitor are in parallel connection to charge the flying supercapacitor, after the flying supercapacitor is charged to a positive voltage or the voltage of one high-voltage single power source is changed to be the lowest, the flying supercapacitor is switched to the next highest-voltage power source and is in parallel connection with the highest-voltage power source, and so repeatedly, voltage balance of energy storage equipment is achieved. The invention further discloses a voltage balance system using the method. According to the energy storage equipment voltage balance method and system, the single supercapacitor is used as a flying element to be in parallel connection with the single power sources in the opposite direction, the problem that traditional voltage differences are too small is solved, the demand for large-power charging and discharging is met, sufficient capacity can further be provided, and energy transfer efficiency is improved. Circuits are simple, and each single power source is used as a working power source for controlling a switching transistor. The single power sources are used for being in parallel connection with the supercapacitor in a reversed polarity mode, and the response speed and the reliability of the system are improved.

The invention relates to a rapid internalization process of a tubular colloidal battery, comprising the steps of: first, preparing two electrolytes with different densities; The second step is to pourthe low density electrolyte into the battery and charge the battery at a low current of 1-2h; 3, charging and discharging in four stage, and replacing that low-density electrolyte with the high-density electrolyte in the second charging process of the second stage. As that unique internalize forming process is adopted, the difficulty of the internalizing forming is reduce, the internalizing forming efficiency is improved, and the electric energy consumed by the internalize forming is saved at the same time.

The invention discloses a wholly-plastic pressure-bearing double-circulation solar water tank which comprises a water tank housing and an inner water tank arranged in the water tank housing. A heat preservation layer is arranged between the water tank housing and the inner water tank, and the inner water tank is further provided with a pressure relief port communicated with the outside. The wholly-plastic pressure-bearing double-circulation solar water tank is characterized inn that the inner water tank consists of an upper seal head, a lower seal head and a middle housing, a heat exchange pipe bundle is installed in the inner water tank through a positioning plate, the internal spaces of the upper seal head, the lower seal head and the heat exchange pipe bundle serves as pipe passes, and the portion between the heat exchange pipe bundle and the middle housing serves as a housing pass. The wholly-plastic pressure-bearing double-circulation solar water tank is mainly made of a high-polymer material or a modified high-polymer material or a reinforced high-polymer material, is high in strength, resistant to corrosion and capable of saving a large amount of metal materials, the manufacturing cost of a solar water heater system can be remarkably reduced, and the wholly-plastic pressure-bearing double-circulation solar water tank has the advantages of being long in service life, high in reliability, simple in production process and the like, can be industrially produced in a large-scale mode and has wide market prospect.

The invention relates to a megawatt-level wind generating set paddle changing system battery automatic testing method and system. The method comprises the following steps of: carrying out battery testing when a wind generating set is in 80 degrees -50 degrees paddle opening period under a starting mode; during the battery power supply period of the wind generating set under a grid-connected mode, controlling a paddle changing system through a master control system to be changed from 0 degree to 5 degrees in a feathering mode, and opening a paddle from 5 degrees to 0 degree; and if a battery has a fault, using a main power supply to carry out feathering. The system comprises a contactor 1 K1 which controls the main power supply to supply power to a servo driver, a contactor 1 K2 which controls a battery to supply power, and a power supply switch bit (PSSB) which can control the contactors 1 K1 and1 K2, wherein normally closed contacts of the contactors 1 K1 and 1K2 are respectively connected in series with the opposite control loops so as to form interlocking. The method and the system provided by the invention utilize a mode that blades drive the loading battery to discharge in the grid-connected operation process of the wind generating set, the paddle changing system battery can be tested at regular time, and potential safety hazard caused by negligence can be avoided.

The invention discloses a method and device for achieving steam stabilization output by utilizing multi-furnace-body combination and a steam stabilization output system. The device comprises three furnace bodies of the in-water pre-heating furnace body, the main heating furnace body and the steam storage and reheating furnace body. The main heating furnace body is responsible for generating steam, the in-water pre-heating furnace body is responsible for pre-heating inflowing water to ensure that high-temperature water is added into the main heating furnace body every time, and the steam storage and reheating furnace bodies are responsible for conducting adequate storage and reheating on the steam generated by the main heating furnace body to ensure that the steam reaches the sufficient capacity, temperature, pressure and saturability. According to a multi-furnace-body combination technology, continuous generation and stabilization output of the steam are achieved, the three key elements (pressure, temperature and saturability) of the steam and the steam storage capacity all meet the requirements for high-quality ironing, the industry problem is solved, and the ironing effect and the production efficiency are improved.

An endoscope includes an imaging device that is provided in a tip portion (10) of an insertion part (6) which can be inserted into a body cavity. The imaging device includes an image-sensor (21) thatan image receiving surface thereof is disposed crossing a longitudinal direction of the insertion part (6); a sensor connecting portion (30) which faces a surface of the image-sensor (21) on which connection terminals (26) are provided and is connected to the connection terminals (26); a wire connecting portion (31) which extends from an outer end of the sensor connecting portion (30) toward a base end side of the insertion part (6) and a center of the image receiving surface and has a circuit board (24) which is bent more than once; and a composite wire (27) of which a plurality of cables (28) connected to a cable connection surface (31a) of the wire connecting portion (31) facing the base end of the insertion part (6) are bundled. The composite wire (27) includes a first shield conductor(27B) provided around the plurality of cables (28) that are bundled and connected with the cable connection surface (31a).

The invention relates to a clean EGR loop system. The system comprises a charge coagulating chamber (1), a catcher (2), an EGR cooler (3) and an EGR valve (4); the charge coagulating chamber (1) is of a cavity structure, a metal strip (12) serving as a discharge electrode is arranged on the charge coagulating chamber (1), an electrode plate (23) is arranged in the catcher (2), an outlet of the charge coagulating chamber (1) is connected with an inlet of the catcher (2), an outlet of the catcher (2) is connected with an inlet of the EGR cooler, and the EGR valve is arranged on an outlet of the EGR cooler; compared with the prior art, the system has the beneficial effects that through the electric field effect, the content of NOx and HC in automobile engine waste gas can be reduced, the content of NOx and HC is reduced, corrosion to the EGR cooler and the EGR valve is reduced, and final emissions of the NOx are reduced; the system is low in cost, small in size, high in efficiency, small in resistance and easy to regenerate; the system can be additionally arranged in a GDI engine without complex modification, the service life of the EGR valve and the EGR cooler is greatly prolonged, and the response speed and the circulation efficiency of EGR are improved.

The invention provides a lithium electric spray gun with a liquid pot being adjustable in height. The lithium electric spray gun comprises the liquid pot, a gun body and a handle connected with the gun body. A battery mounting seat used for mounting a battery pack is arranged at the bottom of the handle. The liquid pot comprises a pot body and an adjusting seat arranged on the lower portion of the pot body. A transmission part matched with the adjusting seat is arranged on the pot body. The adjusting seat and the transmission part are matched in a transmission mode to change the height of the liquid pot so that the height of the liquid pot can be adjusted according to the height of the battery pack, the bottom of the liquid pot and the bottom of the battery pack are made to be on the same plane, and the lithium electric spray gun can be placed stably.

The centrifugal separator (1) comprises a bowl (3) rotating during operation in a direction of rotation (65) and having a separation chamber (19). A base (131) is provided at a rear longitudinal end of the bowl (3) to define the separation chamber (19). The base (131) comprises a first outlet opening (45) defined in the radial direction at a first level (67) by a weir (43), and the base (131) defines a rear longitudinal area (41) of the centrifugal separator (1). An outlet chamber (37) communicates with the separation chamber (19) through the first outlet opening (45). The outlet chamber (37)is connected with an outlet chamber outlet opening (148), which is opening at a second level (69) below the first level (67) into an exterior (40) of the bowl (3) in a second longitudinal area (50) in front of the rear longitudinal area (41). The outlet chamber outlet opening (148) is provided with an outlet nozzle (59) with an outlet direction opposite the direction of rotation (65), and an overflow inlet opening (55) is present in the outlet chamber (37), which overflow inlet opening (55) is placed at a third level (71) between the first and the second level (67 and 69), and the overflow inlet opening (55) communicates with an overflow outlet opening (57), which is opening into the exterior (40) of the bowl (3) in the second longitudinal area (50).