1127results about How to "Solve power problems" patented technology

The invention relates to a direct-driving wave power-generating and energy-storing device and a control method. The direct-driving wave power-generating and energy-storing device is characterized by comprising a direct-driving wave generator, an AC / DC (Alternating Current or Direct Current) converter, a DC / AC (Direct Current or Alternating Current) converter, a plurality of loads, two DC / DC (Direct Current or Direct Current) converters, a mixed energy storing system and a controller, wherein the mixed energy storing system comprises an ultra-capacitor bank and a storage battery pack; the direct-driving wave generator is used for converting the kinetic energy of waves to a low frequency alternating current and sending to the AC / DC converter; the AC / DC converter is used for converting the low frequency alternating current to a direct current and connect and connected with the input end of the DC / AC converter through a direct current bus; the output end of the DC / AC converter is connected with the loads; the direct current bus is respectively connected with one ends of the two DC / DC converters, the other end of one of the two DC / DC converters is connected with the capacitor bank, and the other end of the other of the two DC / DC converters is connected with the storage battery pack; and the controller is used for controlling the ultra-capacitor bank and the storage battery pack to regulate power flow so as to keep the balance between the output power of the direct-driving wave generator and the power of the loads. The invention can be widely applied to the process of converting the kinetic energy of sea water fluctuation to the electric energy.

The invention relates to a single-phase universal electric energy quality controller for power supply for electrified railways, and belongs to the technical field of flexible AC power transmission and distribution; the invention comprises a single-phase multi-coil transformer composed of a primary coil and n secondary coils, so that the secondary coils of the transformer can be connected in parallel with n voltage sources of current transformers; n capacitors are connected with n voltage source current transformers, so as to form a single-phase chain-type H-bridge current transformer with n chains; the AC terminal of the H-bridge current transformer is directly connected with the traction grid through a reactor. The invention has the functions of active power control, reactive power compensation and harmonic compensation, so as to resolve three-phase voltage unbalance, voltage fluctuation, low power factor and harmonic pollution and so on that exist in ER traction transformer stations, effectively lower the capacity of traction transformers, increase ER transport capacity and transportation capability. Moreover, the invention is characterized in small occupied area, little loss and low cost, in order to gain perfect harmonic suppression characteristics and dynamic response features, and provide convenience in industrial production and improve device reliability.

The invention relates to an on-line temperature measuring method for the cable joints of a high voltage device; three temperature sensors are stuck on the surfaces of three metal conductive bodies; current induction coils are sheathed on the metal conductive bodies; a power circuit, microprocessors and wireless emitters are arranged on the metal conductive bodies and sealed in an insulator by circuit boards; the digital identifying codes of the three output ends of the measured cable joints are written in the microprocessors of each own; three metal conductive bodies sealed by insulating materials are respectively arranged at the three-phase output ends of the cable joints; each current induction coil after inducing that the currents are processed by the power circuit provides a working power for the temperature sensor, the microprocessor and the wireless emitter of each own; the microprocessors emit the monitored temperature signals and corresponding identifying codes by the wireless emitters; a wireless receiver receives the wireless electric signals of each circuit, demodulates the wireless electric signals into digital signals and transmits the digital signals to a display instrument; the display instrument receives and identifies three corresponding cable joints. The on-line temperature measuring method can instantly accurately monitor the temperature of the cable joints of the high voltage device on line.

The invention relates to a solar-powered ultra-high voltage line monitoring system, comprising a high-voltage side solar power supply, a high voltage line monitoring device, a low-voltage side solar power supply, a line monitoring host computer and a remote wireless intelligent monitoring system. The high-voltage side solar power supply and the low-voltage side solar power supply comprise solar batteries, rechargeable batteries and power management units; the high voltage line monitoring device and the line monitoring host computer comprise sensing units as well as data acquisition and recording units for detecting and processing field parameters of various lines; and the remote wireless intelligent monitoring system comprises a wireless communication unit and a monitoring system master station. The high-voltage side solar power supply, the high voltage line monitoring device, the low-voltage side solar power supply, the line monitoring host computer and the remote wireless intelligent monitoring system compose a field device which collects and records the running status and fault information of high-voltage lines through solar power and transmits the running status and fault information to the monitoring system master station through the remote wireless communication unit so as to provide real-time information for power line monitoring.

The invention relates to a vehicle environment sensing system and method based on an unmanned plane, and the system and method are used for quickly acquiring the road environment information around a vehicle. The sensing system comprises the unmanned plane and an earth station, the unmanned plane id connected with the vehicle through a mooring rope, the road surface is shot by the unmanned plane, and a video image is transmitted to the earth station; the earth station is arranged in the target vehicle, the earth station can process the video image to obtain the vehicle environment information, and the earth station also can calculate the flight control parameter and send the parameter to the unmanned plane to make the unmanned plane and the vehicle move together. The sensing method is based on the sensing system, the unmanned plane takes off and hovers above the vehicle, the unmanned plane establishes a communication for sensing the environment and transmits the video image to the earth station, the earth station processes the video image, calculates the vehicle environment information and transmits the information to the vehicle, and the earth station calculates the flight control parameter and transmits the parameter to the unmanned plane. According to the invention, the system can perform the wide area observation in the direction vertical to the vehicle plane direction, the coverage is wide, the road environment information around the target vehicle can be easily sensed, and the distance between the objects in the image can be precisely calculated.

The invention discloses an optical fiber sensor-based natural gas pipeline leakage monitoring method and an optical fiber sensor-based natural gas pipeline leakage monitoring system. Optical fibers in a communication optical cable which is laid in the same channel of an oil and gas pipeline respectively serve as a transmitting optical fiber and a returning optical fiber; pipeline leakage optical fiber sensors are connected in parallel between transceiving transmitting optical fibers to form an optical path by an optical multiplexing technology; the pipeline leakage optical fiber sensors are uniformly arranged along the pipeline; laser light emitted from a light source is subjected to beam splitting through a transmission optical path and is transmitted to the sensors arranged on the wall of the pipeline; after the sensors pick up leakage vibration signals and noises propagated along the pipeline, the leakage vibration signals and the noises are returned to a photoelectric detector part of the system through the transmission optical path; the acquired vibration wave signals are analyzed and processed; and the position of a vibration wave source is determined by combining the propagation speed of the vibration wave on a pipeline body according to the time delay of the vibration waves propagated to a plurality of adjacent optical fiber sensors. By the method and the system, the flexibility is high; and the positioning accuracy is high.

The invention relates to a unified power energy quality controller based on the serial-connection multiplicity of transformers and a chain structure, which belongs to the technical filed of flexible AC transmission and distribution of an electric power system and the power electronic. The unified power quality controller comprises a single-phase serial-connection multiple transformer bank and a single-phase chain H bridge converter, wherein the transformer bank consists of m single-phase transformers which form the serial-connection multiple transformer bank together with n voltage source converters connected with n secondary windings of m single-phase transformers respectively; the single-phase chain H bridge converter is provided with n chains and is formed by connecting n DC voltage supporting units and n power source converters, and an AC port of the n-chain single-phase chain H bridge converter is directly connected with the electric fence through a reactor, m and n are signless integrals equal to or more than 2, and m is less than or equal to n. The invention can realize accurate current control, has high dynamic responding speed, and can solve the problems of the traction substation of an electrified railway that the three-phase voltage is unstable and fluctuates, the power factor is low and the harmonic pollution exists, and the like.

The invention relates to a distribution network coordination control system taking account of distributed power, comprising a main control, a simulation display screen, thirteen groups of mutual inductors, nine groups of distributed switch control terminals, two groups of distributed power installation control terminals, two groups of distributed energy-storing device control terminals, two groups of distributed power installations, two groups of three-phase inversion devices, two groups of energy-storing devices and two groups of charging / inversion devices. The invention enables the distribution system to possess a run state coordinating the distributed power in the network, thereby realizing the capability of making the clean energy utilization rate maximization in the network. By the invention, the run state of the distributed power is coordinated and optimized to realize that the load tracking rate of the clean energy reaches more than 70%, meanwhile, avoid the impact to the distribution network due to any network connection / disaggregation of the distributed power; when the distribution network occurs an extreme accident, i.e. the distribution network occurs an isolated island running situation, the distributed power and the energy-storing devices are coordinated to run at the largest power, thereby guaranteeing that the important loads in the network are in normal power supply, and solving the power supply problem of the distribution network when the extreme accident occurs.

The present invention discloses a method of wireless digital relay system and transmission time interval selection, which is suitable for time division duplex wireless communication system. The relay system comprises at least a wireless digital repeater, at least a base station, at least a mobile terminal. Linkage between the base station and the wireless digital repeater is divided into a first uplink and a first downlink; the linkage between the wireless digital repeater and the mobile terminal is divided into a second uplink and a second downlink; the linkage between the base station and the mobile terminal is divided into a third uplink and a third downlink; the first uplink and the first downlink adopt the fixed transmission time interval; the second uplink, the second downlink, the third uplink and the third downlink select adaptively the transmission time interval according to the channel quality of corresponding linkage. By supporting flexible transmission interval, the invention uses the optimal transmission time interval in different channel conditions, optimizes transmission efficiency and time delay, and saves transmission power.

The invention discloses an optical fiber sensor-based natural gas pipeline leakage monitoring method, an optical fiber sensor-based natural gas pipeline leakage monitoring system and a system construction method. Optical fibers in a communication optical cable which is laid in the same channel of an oil and gas pipeline respectively serve as a transmitting optical fiber and a returning optical fiber; pipeline leakage optical fiber sensors are connected in parallel between transceiving transmitting optical fibers to form an optical path by an optical multiplexing technology; the pipeline leakage optical fiber sensors are uniformly arranged along the pipeline; laser light emitted from a light source is subjected to beam splitting through a transmission optical path and is transmitted to the sensors arranged on the wall of the pipeline; after the sensors pick up leakage vibration signals and noises propagated along the pipeline, the leakage vibration signals and the noises are returned to a photoelectric detector part of the system through the transmission optical path; the acquired vibration wave signals are analyzed and processed; and the position of a vibration wave source is determined by combining the propagation speed of the vibration wave on a pipeline body according to the time delay of the vibration waves propagated to a plurality of adjacent optical fiber sensors. By the method and the system, the flexibility is high; and the positioning accuracy is high.

The invention provides a liquid drop whispering gallery mode laser and a manufacturing method thereof. According to the liquid drop whispering gallery mode laser, a first single-mode optical fiber with the middle being provided with a cone area is connected with a pump light source and a spectrograph, a second single-mode optical fiber is connected to a trapping light source and an annular core optical fiber, the front end of the annular core optical fiber is processed into a cone frustum shaped optical fiber tip, a laser beam emitted by the trapping light source is injected into a fiber core of the annular core optical fiber through the second single-mode optical fiber, total reflection and refraction occur in light at an inclined plane of the cone frustum shaped optical fiber tip of the annular core optical fiber, an annular convergence optical field is formed near the cone frustum shaped optical fiber tip so as to realize an optical tweezers function, the optical tweezers stably capture a micro liquid drop, the captured liquid crystal micro liquid drop is enabled to be close to the cone area of the first single-mode optical fiber, the pump light source injects from the front end of the first single-mode optical fiber, and the spectrograph detects excited laser light at the rear end of the first single-mode optical fiber. According to the invention, a high Q-value liquid drop micro spherical cavity with a perfect surface is formed by surface tension, and the optical tweezers stably control the liquid drop micro-sphere. The liquid drop whispering gallery mode laser provided by the invention has an extremely low threshold.

The invention relates to an LED (Light Emitting Diode) illumination intelligent control system which comprises a synchronous rectification unit used for providing direct-current power for at least two intelligent power control units, wherein the output end of each intelligent power control unit is connected with a corresponding LED light group unit via an electric wire; and the synchronous rectification unit is connected with each intelligent power control unit by a high-voltage direct-current bus. In the intelligent control system, stable constant-voltage direct current is provided for an LED illumination system by the synchronous rectification unit, so that the whole illumination system can operate under high power factor with less harmonic wave. the corresponding LED light group units are dynamically and precisely dimmed by the intelligent power control units, and the LED operation situation is detected in real time and communication with an external control center is carried out. The intelligent control system has the characteristic of reasonable structure, and is convenient to control, the working environment temperature of an LED light group can be improved, and the reliability and the service life of an LED illumination light can be improved.

The invention discloses an optical fiber sensor-based natural gas pipeline leakage monitoring system. The optical fiber sensor-based natural gas pipeline leakage monitoring system comprises an optical path system and a circuit. optical fiber sensors are arranged on a pipeline body at certain intervals; a plurality of adjacent optical fiber sensors form an optical fiber sensor group; the optical fiber sensor groups are connected with a light source through one transmitting optical fiber; each optical fiber sensor group is connected with an photoelectric detector through a return optical fiber; the output of the photoelectric detector is connected with a signal acquisition and processing module with leakage signal identifying and event positioning functions; and the output of the signal acquisition and processing module is connected with a microcomputer through an external interface. By the method and the system, the flexibility is high; and the positioning accuracy is high.

The invention relates to a method for short-term predicting of photovoltaic generation power on the basis of similar day feature classification and extreme learning machine, belongs to the technical field of photovoltaic station power generation and aims to predict output power of a photovoltaic power generation system. The method includes: firstly, based on meteorological data of a public weather forecast network, subjecting meteorological data and photovoltaic generation system capacity to similar day feature classification according to meteorological features such as season and day type and according to photovoltaic generation power features; secondly, applying a single hidden layer neural network based on extreme learning machine algorithm as a forecast model, and applying selected similar day data as a training sample to train the single hidden layer neural network in the extreme learning machine algorithm; and thirdly, applying known capacity sequence, maximum air temperature and minimum air temperature of similar day forecast periods of most similar forecast days, and maximum air temperature and minimum air temperature of precast periods of the precast days as neural network input, and predicting generating power of a photovoltaic station in future three hours. The requirement of the method for devices is low, a predicting model is highly targeted at regions, and the method is easy to implement and high in precision.

The invention discloses an alternating-direct current series-parallel port distribution network and a comprehensive dispatching control method thereof, and belongs to the field of port distribution power and distribution network automation. The distribution network comprises a general step-down station, a branch substation or a switch-on / switch-off station and various distribution subsystems; a multi-channel feeder of the general step-down station provides alternating current power for the various distribution subsystems through the branch substation or the switch-on / switch-off station; each distribution subsystem comprises a shore electronic system, a shore bridge subsystem, a field bridge subsystem, a power charging and converting station subsystem for electric port trailers, a new energy subsystem and a production life subsystem; each distribution subsystem utilizes an alternating current distribution transformer and an AC / DC converter to construct a direct current bus of the distribution subsystem, and the direct current buses of the distribution subsystems are in direct current interconnection through direct current interconnection protection switches; each distribution subsystem is internally provided with multiple sections of direct current buses, and the multiple sections of direct current buses are in direct current interconnection through direct current interconnection protection switches. According to the alternating-direct current series-parallel port distribution network and the comprehensive dispatching control method thereof, the optimal power supply and comprehensive dispatching control of the port distribution network can be achieved.

The invention discloses an Ad Hoc network-based crane automatic cruising system of an RTK Beidou positioning system. The Ad Hoc network-based crane automatic cruising system comprises: at least one Beidou positioning base station used for acquiring base station positioning data of the Beidou positioning base station; at least one positioning tracking device used for acquiring corresponding RTG crane positioning data and connected with a control device arranged in a crane; and at least two Ad Hoc network communication devices respectively communicated with the Beidou positioning base station and the positioning tracking device, wherein Ad Hoc network is established between the Ad Hoc network communication devices; the RTK Beidou positioning base station sends the base station positioning data through the Ad Hoc network communication devices; and positioning tracking devices transmit data, acquire the carrier wave phase observed value of the base station through the Ad Hoc network communication devices, carries out positioning calibration by combining positioning data of the above RTG crane to obtain the RTK coordinate of the RTG crane, and realizes automatic cruising through a control apparatus according to the RTK coordinate of the RTG crane and a cruising algorithm. The invention also discloses an automatic cruising method.

The invention relates to a radio frequency power amplifier based on a transformer, comprising an input transformer, a driving circuit, a power amplification circuit, an impedance matching network and an output transformer that are successively connected; the input end of the input transformer is respectively connected with a single-end radio frequency input (RFIN) signal and the ground; the output end of the input transformer is connected with the input end of the driver circuit; the single-end radio frequency input signal is converted into a differential signal, and the differential signal is output to the driver circuit; the differential signal of the driver circuit is output to the power amplification circuit after being amplified; and the power amplification circuit is in the cascode structure. In the radio frequency power amplifier, devices, such as an inductor, a capacitor, a transformer and the like are integrated on a substrate, impact on the performance of the amplifier by the complementary metal oxide semiconductors (CMOS) technology is effectively avoided on the premise of furthest utilizing the advantages of the CMOS technology, and circuit efficiency is improved; and compared with the traditional totally-integrated radio frequency power amplifier, the radio frequency power amplifier disclosed by the invention has the advantages of higher power and efficiency and more stable performance.

The invention relates to an emergency traction system applied to urban mass transit. The system comprises a power supply network, an auxiliary system of an urban mass vehicle, a main traction invertor, a traction motor, a power conversion device, an energy storage component and a master controller; the output end of the power supply network is connected with the power conversion device, the main traction invertor and the auxiliary system of the urban mass vehicle respectively; one end of the energy storage component is connected with the high-voltage side of the power supply network, and one end of the energy storage component is connected with the power supply network; the high-voltage side of the power conversion device is connected with the main traction invertor and the auxiliary system of the urban mass vehicle, and the low-voltage side of the power conversion device is connected with the energy storage component; and the traction motor is connected with the output end of the main traction invertor, and drives a train to run; and the power supply network, the auxiliary system of the urban mass vehicle, the main traction invertor, the traction motor, the power conversion device and the energy storage component are connected with the master controller through a communication bus. The system is suitable for high voltage grades, has a smaller volume and long service life, is high in reliability, and wide in an application range, and can be controlled flexibly, the traction load and distance are larger; and time of return on investment is short.

The invention discloses an electrical power system key node identification method based on active power load flow betweenness, and belongs to the field of electrical power system safe reliability protection. According to the method, a computer is utilized, the load flow distribution of an electric power system, power in each transmission path and the active power load flow betweenness of each node are confirmed through a program, and finally a key node is identified. The method can take the directivity of load flow and a system operation mode into account simultaneously and can indirectly reflect the influence of voltage and reactive power on an identification result, an identification process corresponds to the actual operation condition of the electric power system better, and can accurately reflect the function of each node in the active power transmission of an electrical power system, and accordingly the key node of the electric power system can be identified effectively. The method can be widely applied to the identification of the key node of the electric power system, is especially suitable for the identification of the key node of a large and complex electric power system, and provides reliable scientific bases for prevention of the accidents of the electric power system.

The invention discloses a robot rotational joint driving device which comprises a driving mechanism and an execution output mechanism. The driving mechanism comprises a servo motor and a hydraulic pump, the execution output mechanism comprises two hydraulic cylinders arranged in parallel, and a swinging rod is connected between pistons of the two hydraulic cylinders and can swing around the gyration center of the swinging rod under driving of the pistons at the two ends; a robot component is connected to the gyration center of the swinging rod and rotates along with swinging of the swinging rod; the driving device further comprises a detection module, a processing module and a motor controller. The execution output mechanism is driven by the servo motor to conduct outputting, the output power is high, and the requirement that a rotational operation robot needs high-power rotational joints of compact structures can be effectively met. Intermittent one-way turnover movement of a transmission shaft is achieved through one-way bearing transmission. A transmitter is used in cooperation with an amplifier, the rotation amount of the robot component is effectively adjusted, and the rotation accuracy and the rotation reliability are guaranteed. The robot rotational joint driving device is simple in structure and convenient to implement.

The invention relates to the technical field of reliability test of a disc-type tool magazine and automatic tool-changing system for a machining center and specifically relates to a disc-type tool magazine and automatic tool-changing system comprehensive performance detection platform. The detection platform comprises a detection system, a test system and a control system. The detection system is used for finishing detection and collection of various parameters of the disc-type tool magazine and automatic tool-changing system; the test system is used for testing the reliability of the same-kind multi-dimension disc-type tool magazine and automatic tool-changing systems; and the control system is used for finishing setting of related test parameters in the test process and carrying out processing and analysis on the collected parameters, graphical display and test result display, and realizing comprehensive control of the detection system and the test system. The comprehensive performance detection platform is a test platform capable of loading the same-kind multi-dimension disc-type tool magazine and automatic tool-changing systems; and especially, the platform can carry out detection on the state and performance of the disc-type tool magazine and automatic tool-changing system and give corresponding analysis results.

A hydropower station set LCU active pulse adjusting system disclosed by the present invention comprises a module of obtaining a set active target value, a module of obtaining a power adjusting mode, a module of obtaining opening mode initial values by an interpolation algorithm, a module of obtaining an adjustment pulse width by a modified proportional algorithm and a set active monitoring module. According to the present invention, and according to the head change, the interpolation algorithm is used to calculate the opening mode initial values comprising a set active current value, an adjustment target value, an adjustment dead zone value and a pulse adjustment proportion coefficient K value, and the modified proportional algorithm is used to calculate a power pulse width. The hydropower station set LCU active power pulse adjusting system is provided for the first time, and satisfies the set active adjustment rapid stability and reliability requirements of a large-scale hydropower station monitoring system.

The invention discloses a semi-static resource scheduling method, which comprises the following steps: largest physical resource magnitude that is occupied by business channels, transmission block size (TBS) and physical resources that are corresponding to the TBS are configured; when the TBS is chosen according to network telephone (VOIP) data block size that is loaded by the present business channel, the physical resource magnitude that is occupied by the present business channel is computed according to the TBS and the physical resources corresponding to the TBS; balance of the physical resource that is occupied by the present business channel is obtained according to the largest physical resource magnitude and the occupied physical resource magnitude, and the physical resource balance is determined as adjusting information and encapsulated in a control signaling which is sent to network equipments and used for scheduling. The invention further discloses a semi-static resource scheduling system, a retransmission-optional scheduling method and a retransmission-optional scheduling system that are based on semi-static scheduling. The methods and the systems of the invention can realize VOIP business support and effectively reduce the cost of control channels at the same time.

The invention provides a novel lithium ion battery with high power and high energy density. The novel lithium ion battery comprises a positive plate, a negative plate, a diaphragm, electrolyte, a lug and a shell; the negative plate is mixed by negative electrode active materials, a negative electrode conductive agent and a negative electrode binder; the negative electrode active materials are composed of SiO, soft carbon and / or artificial graphite; the negative electrode conductive agent is at least one of superconductive carbon black and a single-walled carbon nanotube; and the negative electrode binder is at least two combinations of styrene butadiene rubber, acrylate and sodium carboxymethyl cellulose. The battery provided by the invention has excellent rate discharge capacity and high energy density; and besides, the weight specific energy density reaches 230wh / kg, the volume specific energy density is above 650wh / L, the power density is above 1,500w / kg, the rate discharge performance reaches 10C, and the cycle performance can reach more than 500 times.

The invention provides a cable-free air bag type robot system which comprises a monitoring computer, a singlechip microprocessor, a wireless communication receiving and sending device, a wireless energy emitting circuit and a cable-free air bag type robot, wherein the singlechip microprocessor is respectively connected with the monitoring computer, the wireless communication receiving and sending device and the wireless energy emitting circuit, and the cable-free air bag type robot is in communication connection with the wireless communication receiving and sending device and is in energy exchange with the wireless energy emitting circuit. The cable-free air bag type robot system has the advantages of small trauma, safety and reliability, high movement efficiency, and wide application range.

The invention provides a Doppler frequency offset estimation method under a high-speed rail environment. The method comprises the following steps: step 10, acquiring time domain channel estimation; step 20, separating a channel estimation value containing a LOS path; step 30, performing frequency offset estimation. The invention further provides a Doppler frequency offset estimation system under the high-speed rail environment. The method provided by the invention is low in operational complexity and high in precision, capable of effectively eliminating frequency offset jump, and releasing the load of a radio frequency remote unit; the system is simple in structure and low in cost.

The invention provides an upstream scheduling method and an upstream scheduling device. The method comprises the steps as follows: user equipment (UE) receives downstream control information (DCI) sent by a base station, and the UE transmits an upstream channel or / and a signal according to configuration information of the base station and the DCI channel and determines the transmission power of the channel and / or the signal. According to the technical scheme of the method and the device provided by the invention, the problems of license information confirmation and transmission power distribution and indication are solved, and a technical scheme of licensed carrier assisted access is completed.

The invention discloses a satellite communication frequency conversion terminal equipment of a Ku band. The satellite communication frequency conversion terminal equipment of the Ku band comprises a frequency conversion processing module used for converting a received intermediate frequency signal of an L band into a radio-frequency signal of a Ku band; a power amplification module, which comprises a preceding stage drive unit, a secondary driving unit and a last stage synthesis unit that are orderly connected, wherein the power amplification module is used for performing power amplification on the radio-frequency signal of the Ku band outputted by the frequency conversion processing module, and realizing the high power output of the radio-frequency signal of the Ku band; and a monitoring and control module used for detecting the output power of the power amplification module, and controlling a variable attenuator in the preceding stage drive unit of the power amplification module according to a comparison result with the scheduled output power, so that the output power of the power amplification module can be locked. According to the satellite communication frequency conversion terminal equipment of the Ku band provided by the invention, by setting the multistage cascaded power amplification unit, the technical problems of high-power synthesis and efficient heat dissipation can be solved, and the design of consistent and balanced amplitude and phase can be realized.

The invention discloses a mixed induction type active electric power filter system. The mixed induction type active electric power filter system comprises a rectifier transformer, a filtering branch, a rectifier and the other filtering branch, wherein the other filtering branch comprises three passive filters and a voltage source inverter, the passive filters are connected to the voltage source inverter, the primary side of the rectifier transformer is connected to a three-phase power grid through connecting impedor, an epitaxy winding of the secondary side of the rectifier transformer is connected with the rectifier, and the passive filters are connected to three junction points between a delta winding and the epitaxy winding of the secondary side of the rectifier transformer in parallel respectively. According to the mixed induction type active electric power filter system, influence of frequency fluctuation of the power grid side and the high-capacity nonlinear load side on electric power filtering performance is eliminated; meanwhile, the problems that serious harmonic pollution, high additional loss of a master device, high vibration and noise, low system power factor and low system operation efficiency are caused by harmonic waves and idle work to an industrial power distribution and consumption system are effectively solved on the premise that electric power quality on the power grid side meets the national standard of China.

The invention relates to an optical fiber sensing natural gas pipeline leakage event identification method and an optical fiber sensing natural gas pipeline leakage event identification device, which relates to the field of a mechanical vibration measurement technology, an impact measurement technology and a pipeline system technology. A time domain feature (Pt) of a pipeline normal operation and leakage status signal, a frequency-domain characterization (Pf) and a noise characteristic (Pn) of an existing pipeline transmission signal and the waveshape recognition are comprehensively analyzed, a leakage confidence coefficient function model is built as follows: R=a1Pt+a2Pf-a3Pn, the leakage of a picked up vibration wave signal is evaluated to judge whether leakage happens to the pipeline or not, and different arithmetical parameters a1, a2 and a3 are arranged to regulate the confidence coefficient module according to the characteristics of the existing pipeline; the time domain, the frequency domain and wave form estimation performed on the leakage signal is that the signal can be accurately identified to be the leakage event according to a time-varying enveloping character and abruptness of the leakage signal and a center frequency distribution character of the stable leakage event signal, based on the feature classification of a stimulated leakage event. The optical fiber sensing natural gas pipeline leakage identification method and the optical fiber sensing natural gas pipeline leakage identification device provided by the invention can monitor the signal abnormalities in time and give an alarm with high accuracy at the primary state of the leakage.