87results about How to "Power stability" patented technology

The invention relates to the technical field of battery structures, and provides a box body, a battery and electric equipment.The box body is used for containing a battery module and comprises a bottom plate, a mounting beam and a module beam, the bottom plate is provided with a first side face and a second side face which are opposite in the thickness direction, a reinforcing structure is arranged on the bottom plate, and the module beam is used for mounting the battery module; the module beam is arranged on the first side face, the mounting beam is used for mounting the box body and arranged on the second side face, and the reinforcing structure is used for being connected to the mounting beam and / or the module beam; according to the box body provided by the embodiment of the invention, the mounting beam and / or the module beam can be connected by utilizing the reinforcing structure, so that the connecting strength between the bottom plate and the mounting beam and / or the module beam can be improved, and the aim of meeting the requirement of the box body on relatively high structural strength can be fulfilled.

The invention relates to the technical field of data processing, in particular to an intelligent electric energy meter operation state monitoring method. The method comprises the following steps: acquiring historical maintenance data of the intelligent electric energy meter and power, voltage, temperature and humidity in a historical time period; determining the load change degree according to the relative change condition of the power and the voltage in the historical time period; determining temperature stability and humidity stability, and carrying out weighted summation on the temperature stability and the humidity stability to obtain an environment change degree; correcting scale parameters in a Weibull distribution model according to the load change degree and the environment change degree; and based on the corrected scale parameters, performing fault prediction on the historical maintenance data according to a Weibull distribution model. According to the method, the accuracy of running state monitoring and fault prediction of the intelligent electric energy meter can be improved.

The invention discloses an off-grid photovoltaic power generation system based on flywheel clean battery energy storage. A cleaning model and a charging / discharging equivalent model circuit under a d-q shaft system are established; a control strategy in the flywheel battery charging / discharging process is analyzed and determined, a photovoltaic system and a flywheel battery are combined, a combined system is divided into four working models according to the supply-demand relation between the output power of the photovoltaic system and the power required by a load, and a control method of a combined controller is formulated. And analyzing and optimizing the operation state of the system under each working model and the energy storage and release effects of the flywheel battery. The combined system can stably operate under each working model and among the working models; the charging / discharging efficiency and the discharging depth are relatively high, and a quick response can be made to the difference value change of the output and the load power of the photovoltaic system; and energy is stored when the output of the photovoltaic system is residual, and energy is released to make up for the demand when the output of the photovoltaic system is insufficient, so that the electric energy quality is effectively improved, and the resource waste is reduced.

The invention provides a wind and light storage-based building integrated energy microgrid capacity planning and operation optimization method, which comprises the following steps of: S1, constructing a system total cost model based on wind power and photovoltaic power characteristics, and determining wind power and photovoltaic capacity configuration; s2, constructing a worst operation scene power supply model according to wind power and photovoltaic uncertainty; s3, constructing an energy storage stock optimal configuration model according to the system total cost model and the worst operation scene power supply model, and calculating an energy storage stock optimal configuration strategy; and S4, evaluating the actual operation condition of the system according to the energy storage stock optimal configuration strategy, and optimizing the system according to the feedback of the actual operation condition. By means of multiple energy forms such as wind power, photovoltaic power and energy storage, the energy utilization efficiency can be improved, energy consumption and carbon emission are reduced, and clean, efficient and sustainable supply of energy is achieved.

The utility model discloses a self-powered friction structure and an insole. The self-powered friction structure comprises a negative electrode structure which comprises a first negative electrode material layer, a conductive fabric layer and a second negative electrode material layer which are connected in sequence, and the conductive fabric layer is located between the first negative electrode material layer and the second negative electrode material layer; the positive electrode structure comprises a positive electrode material layer and a base layer which are connected with each other; the plurality of elastic columns are uniformly distributed and are connected with the second negative electrode material layer and the positive electrode material layer to form a hollow structure; the first negative electrode material layer and the second negative electrode material layer adopt an electric polarity material different from that of the positive electrode material layer; the negative electrode structure, the elastic column and the positive electrode structure are integrally formed. According to the self-powered friction structure and the insole, the self-powered friction structure is integrally formed, has the advantages of being high in durability and stable in voltage output, can be conveniently cut at will, and meets the requirement for large-scale production.

The invention discloses a cultural creative down lamp based on the Internet of Things and a control method thereof.The cultural creative down lamp comprises a down lamp shell, a lighting assembly is arranged at the lower end in the down lamp shell, an Internet of Things control module and a power module are arranged in the down lamp shell, a sensor module is further arranged outside the down lamp shell, and the sensor module comprises an ambient light sensor and a human body induction sensor; the sensor module is electrically connected with the Internet of Things control module, the upper end of the down lamp shell is rotationally connected with a mounting base through a damping rotating shaft, stable communication connection can be established between the cultural and creative down lamp and an external intelligent gateway, and then remote control is achieved; a plurality of LED lamp beads with different color temperatures in the lighting assembly cooperate with an ambient light sensor and a human body induction sensor, the lighting electricity consumption cost is reduced, the upper end of a down lamp shell is connected with a mounting base through a damping rotating shaft, and the down lamp can flexibly rotate to adjust the lighting angle due to the design of a rotating clamping base of the mounting base; and the adaptability and the flexibility of the down lamp in different installation scenes are improved.

The invention relates to the technical field of battery structures, and provides a box body, a battery and electric equipment, the box body is used for being arranged on a main body of the electric equipment, the box body comprises a bottom plate and a mounting beam, the bottom plate is provided with an outer wall surface, the mounting beam is used for connecting the main body, the mounting beam comprises a connecting part, and the connecting part is configured to be connected to the bottom plate; at least part of the connecting part is attached to the outer wall surface; according to the box body provided by the embodiment of the invention, the box body can be connected to the main body of the electric equipment through the mounting beam, the mounting beam is connected and attached to the bottom plate through the connecting part, and the contact area between the mounting beam and the bottom plate can be increased by arranging the connecting part; therefore, the larger contact area between the bottom plate and the connecting part can disperse the stress between the bottom plate and the mounting beam, that is, the risk of breakage between the bottom plate and the connecting part is lower, and the box body is more reliable when being hung on the main body of the electric equipment through the mounting beam.

The utility model discloses a high-capacity vehicle-mounted power battery for an AGV (Automatic Guided Vehicle) in the technical field of vehicle-mounted power batteries, which comprises a battery main body, a battery management system and a protection control component, according to the high-capacity vehicle-mounted power battery pack for the AGV, 32 KWh high-capacity lithium iron phosphate batteries are adopted, stable electric power can be continuously provided for the AGV, the working time of the AGV is greatly prolonged, the battery pack is of a compact double-layer battery box structure, the batteries are arranged in an upper layer and a lower layer, the space utilization rate of the batteries is greatly increased, and the battery pack is convenient to use. The limited internal space of the AGV body is utilized more fully, the battery pack is only provided with a set of unified electric connectors, simple plug-in connection of all components in the battery and connection with external equipment are achieved, the installation process of the battery is simplified, maintenance and replacement are more convenient and faster, and the service life of the battery pack is prolonged. The problems of short endurance mileage and low battery space utilization rate of the AGV can be effectively solved.

The application provides a downhole while-drilling active refrigeration temperature difference power generation device and a downhole power generation system, and relates to the field of energy sources.The downhole while-drilling active refrigeration temperature difference power generation device comprises a power transmission module, a refrigeration module, a thermal management module, a while-drilling instrument electric control module and a power generation module; the power transmission module is magnetically coupled with the refrigeration module, and is used for driving the refrigeration module to generate cold energy by taking downhole fluid as a motive energy source; the thermal management module transmits cold energy to the power generation module; the power generation module comprises at least one temperature difference power generation sheet, is connected in series with the while-drilling instrument electric control module, is used for generating power by using a temperature difference, and supplies power to the while-drilling instrument electric control module and while-drilling instruments carried by the while-drilling instrument electric control module. Through the application, the temperature difference power generation method can be used to stably generate power in a downhole environment, and the effect of providing stable electric energy for while-drilling instruments can be achieved.

The invention discloses an antibacterial insole with a self-powered friction sewing structure, comprising: an electroporation sterilization structure, which comprises a nanowire layer, an electrode layer and a spacer layer, and the spacer layer is located below the nanowire layer and the electrode layer; the negative electrode structure comprises a conductive fabric layer and a negative electrode material layer which are connected in sequence, and the conductive fabric layer is located on the negative electrode material layer; the positive electrode structure comprises a positive electrode material layer and a substrate layer which are attached to each other; the plurality of interval cushioning materials are uniformly distributed on the negative electrode material layer and the positive electrode material layer to form a hollow structure; the negative electrode material layer adopts an electric polarity material different from that of the positive electrode material layer; the negative electrode structure, the interval cushioning material and the positive electrode structure are combined through a sewing technology. According to the self-powered friction sewing structure, the preparation method thereof and the antibacterial insole, the self-powered friction sewing structure is simple in process and integrally formed, has the advantages of being high in durability and stable in voltage output, and is free of side effects and antibacterial.

The invention relates to the technical field of oil exploration, solves the technical problem of short-circuit corrosion of a sensor and a circuit board caused by oil, water and gas due to aging failure of a rubber sealing ring in the prior art, and particularly relates to a storage type underground pressure testing device and system. The bottom of the ground reading mechanism is provided with an underground high-temperature-resistant storage type pressure gauge used for measuring the underground pressure of an oil field, and the underground high-temperature-resistant storage type pressure gauge comprises a connecting top seat used for protecting an internal circuit of the pressure testing device, a battery outer cylinder and a circuit board outer cylinder. The aging condition of the sealing rubber ring after long-term use is avoided, the sealing effect is reduced, and the probability of short circuit or corrosion of the sensor and the circuit board in the device is reduced, so that the integrated welding does not affect maintenance, the service life of the device can be prolonged, and the short circuit corrosion problem of the device is reduced.

The utility model relates to a detection device, in particular to a liquid level detection device for a gas well of a gas storage. The detection device is composed of an explosion-proof box body and a detection head, wherein the detection head is composed of a box body connecting disc, an infrasonic wave transducer, an infrasonic wave distance measuring sensor and a temperature and pressure integrated sensor. According to the detection device, low-frequency infrasonic waves are generated through the infrasonic wave transducer, and then the liquid level is detected through the infrasonic waves, so that adverse effects caused by a traditional ammunition sound production mode can be overcome, environmental pollution is effectively prevented, potential safety hazards are reduced, energy consumption is reduced, physical abrasion possibly generated by a traditional electromagnetic valve opening and closing method can be avoided, and the detection effect is good. And the direct contact and friction of mechanical parts are reduced, so that the service life of equipment is prolonged, the system failure rate and the maintenance cost are reduced, and the overall reliability is improved. The problems that an existing detection mode is high in safety risk and equipment is prone to damage are solved. The device is especially suitable for detecting the liquid level of the gas well in the gas storage.

The utility model discloses a kind of communication equipment of ethernet isolated network, including multi-machine communication circuit, FPGA transmission data circuit, fan control circuit and power-on delay circuit.Multiple machine communication circuit realizes and communicates with external multiple equipment;FPGA transmission data circuit is shaped to transmission data and is handled;Fan control circuit connects cooling fan, and it is controlled to start and stop;Power-on delay circuit is connected between each functional circuit and external power supply, and power supply output electric energy is delayed and then supplied to each circuit, and the utility model realizes the orderly start of each functional module by power-on delay circuit, avoid the surge current generated by simultaneous power-on to cause damage to circuit, improve equipment stability.

This invention belongs to the field of new energy and renewable energy development technology, and relates to a dual-source power generation device that combines raindrop cascade power generation with atmospheric moisture absorption, desorption, and condensation of water droplets. It includes: a housing, a droplet power generation array, a condensation chamber, and an energy storage and monitoring system disposed inside the housing, and a photovoltaic composite panel disposed on the top of the housing; the droplet power generation array includes a support plate disposed inside the housing and multiple droplet power generation units, which are arranged in an array on the upper surface of the support plate; the photovoltaic composite panel is movably connected to the housing; the photovoltaic composite panel is a composite panel composed of a photovoltaic panel, a heat-conducting plate, and a fiber layer; the heat-conducting plate is disposed between the photovoltaic panel and the fiber layer; the energy storage and monitoring system is electrically connected to the droplet power generation array and the photovoltaic panel respectively, and is also electrically connected to an external energy storage device or load. This invention alleviates the technical problems of low energy conversion efficiency and poor all-weather stability existing in the prior art.

The utility model discloses a track battery system relates to battery technical field, including at least one group battery module, the battery module includes encapsulation shell, battery body and mobile unit, the battery body is installed in the encapsulation shell, and the mobile unit is installed on the encapsulation shell, the mobile unit is used for with the inside cooperation of track, and drives the encapsulation shell reciprocating movement along the length direction of track, and the electric connection between adjacent battery module. The utility model can realize along track movement, and the security is good.

The present invention discloses a boiler flue gas treatment structure and a double steam boiler, which relates to industrial boiler auxiliary equipment technology, including a flue gas intake pipe, a pH leveling device and a vortex tube, wherein an acid-base impurity removal device is arranged on the left side of the pH leveling device, the flue gas intake pipe is connected to the air inlet of the acid-base impurity removal device, the acid-base impurity removal device is connected to the pH leveling device through a first connecting pipe, the pH leveling device is connected to the vortex tube through a second connecting pipe, the vortex tube cold air port is connected to the acid-base impurity removal device through a cooling pipe, and also includes a second outer shell and a combustion pipe, a collection box is fixedly arranged at the rear side of the second outer shell, and water inlet pipes are fixedly arranged on the top of both sides of the second outer shell. The present invention removes impurities from the high-temperature boiler flue gas through the acid-base impurity removal device, and the vortex tube separates the neutral gas, one stream is a cold air flow and the other stream is a hot air flow, and the cold air flow is transported to the acid-base impurity removal device through the cooling pipe to cool the acid-base impurity removal device.

The invention discloses a unit type curtain wall intelligent control system, and belongs to the field of control systems, the unit type curtain wall intelligent control system comprises a sensor module, a control module, an execution module, a user module and a power supply module, the sensor module comprises a temperature sensor, a humidity sensor, an illumination sensor, a wind speed sensor, a raindrop sensor and a glass fragment detector; the control module comprises a central controller, an algorithm module and a communication module, the execution module comprises a driving mechanism, a transmission mechanism and an execution mechanism, the user module comprises a touch screen, a remote controller and a mobile phone APP, and the power supply module comprises a main power supply and a standby power supply. According to the unit type curtain wall intelligent control system, through cooperative work of the sensor module, the control module, the execution module, the user module and the power supply module, intelligent control and management of the curtain wall are achieved, and the humidity, temperature, light, air quality and the like of the curtain wall can be monitored, regulated and controlled in real time through the intelligent control mode; and the energy-saving effect and the comfort degree of the curtain wall are improved.

The utility model relates to the technical field of lamp detection, and discloses a lamp performance detection turntable, which comprises a base and a connecting turntable mounted on the base, a plurality of lamp mounting components are arranged on the outer side of the connecting turntable, and each lamp mounting component is provided with a lamp body; through cooperation of the base, the connecting rotary disc, the multiple lamp mounting assemblies, the shading assembly and the detection assembly, the multiple lamp mounting assemblies synchronously rotate through rotation of the connecting rotary disc, lamps can be mounted in batches, rotation switching detection can be achieved, the test efficiency is remarkably improved, and through elastic contact of a guiding bending part and an attaching part, the test efficiency is improved. And moreover, the embedded structure of the mounting groove prevents the conductive sheet from shifting, and the light transmission effect of the lamp is detected by the brightness meter after the lamp is shaded by the light shield, so that the unqualified lamp can be conveniently detected, and the detection efficiency of the lamp is improved.

The invention provides a high-temperature flue gas waste heat gradient utilization power generation system and method. The system comprises a first heat storage system, a steam turbine power generation system, a second heat storage system, an organic Rankine cycle power generation system and a flue gas purification system. High-temperature flue gas is subjected to heat cascade storage and recovery through the two heat storage systems in sequence, the steam turbine power generation system and the organic Rankine cycle power generation system are coupled, and finally stable and clean electric power is output. In accordance with the core idea of energy gradient utilization and energy potential matching, gradient and full utilization of high-temperature flue gas waste heat can be achieved through gradient and stable heat storage of the two heat storage media, and therefore loss in the high-temperature flue gas waste heat recycling process and energy grade loss are reduced.

The application relates to the field of food technology, in particular to a plasma intelligent ignition control cabinet, which comprises at least one AC / DC rectifying module for converting alternating current into high-voltage direct current, the AC / DC rectifying module comprises an active power factor correction circuit and a resonant isolation type DC / DC conversion circuit connected in sequence, the active power factor correction circuit is used for performing power factor correction on input alternating current and generating intermediate direct current, and the resonant isolation type DC / DC conversion circuit is used for converting the intermediate direct current into stable high-voltage direct current; by adopting a two-stage high-frequency conversion architecture of 'active power factor correction + resonant isolation type DC / DC conversion', the traditional power frequency phase control rectification is replaced, and the output direct current ripple is fundamentally reduced. In particular, the application of the resonant conversion circuit realizes soft switching of a power switch tube, and greatly reduces switching noise and output ripple.

The utility model provides a power grid protection device. The technical problems that when a power grid breaks down, voltage drops, electric energy cannot be reasonably distributed, the yield of produced products is reduced, and the quality cannot be guaranteed are solved. The power grid protection device comprises a case, a power transformation device is installed in the case, one side of the power transformation device is connected with an external input module through a plurality of input cables, and the other side of the power transformation device is connected with an external output module through a plurality of output cables I. An electrical storage device is further arranged beside the power transformation device. One side of the electrical storage device is connected with the power transformation device through a transmission cable, the other side of the electrical storage device is connected with the output module through a second output cable, an air inlet filter screen is arranged on the top of the case, and an air outlet mechanism is arranged on the back face of the case. According to the utility model, when a power grid breaks down, stable electric energy can be provided in a short time, and the voltage of factory production equipment is ensured, so that the productivity of products is ensured, and a certain time is won for the maintenance of the power grid.

The invention relates to the technical field of motor homes, in particular to a current sharing control method and system. Comprising the following steps: acquiring PID values of total constant voltage output, total current output, first current output, first constant voltage input, second current output and second constant voltage input; the minimum value in the first path and the second path of related PID values is taken as the corresponding reference control quantity; the reference control quantity and the current-sharing compensation quantity are superposed to obtain a corresponding outer-loop control signal, the inductive current is tracked according to the outer-loop control signal to obtain a corresponding inner-loop control signal, the inner-loop control signal and the feed-forward quantity are superposed to obtain two paths of corresponding PWM driving signals, and control is performed based on the PWM driving signals; according to the scheme, a system safety boundary is constructed through a minimum value competition mechanism, and an adjustment mode of independent PID current sharing compensation, reference control quantity and feedforward quantity superposition is combined, so that the response time for generator voltage fluctuation and load abrupt change is shortened, and the current sharing precision and the system stability are effectively improved.

The invention provides a mobile oxyhydrogen electricity, heat and cold combined supply system and a capacity configuration method, and relates to the technical field of energy. A photovoltaic module is arranged at the top of the integrated device, and hydrogen storage equipment, oxygen storage equipment, heat storage equipment and cold storage equipment are arranged outside the integrated device; the integrated device comprises an electric energy conversion module, a liquid purification module, an electrolytic cell module, a hydrogen energy fuel cell module, a heat management module, a refrigeration module and a control module. According to the movable hydrogen-oxygen-electricity cold-heat co-production system with multi-energy co-supply, high integration, intensive resources, convenient deployment and intelligent cooperation and the capacity configuration method thereof, hydrogen-oxygen-electricity-heat-cold multi-energy co-supply can be achieved, and the adaptability, flexibility and economical efficiency of the system are remarkably improved. The important defects that an existing mobile energy supply system is single in energy supply form, low in module integration level, low in comprehensive energy utilization rate, short in continuous operation time and the like are well overcome, and the requirements for high efficiency, flexibility and economical efficiency of the mobile energy supply system under various complex scene dynamic working conditions are met.

The invention discloses a power management system and a power management method. The power management system includes an AC power supply, a first battery, a first charger, a second battery, a second charger, and a control circuit. The first charger is electrically connected to the first battery, the electronic device and the AC power supply, and the second charger is electrically connected to the second battery, the electronic device and the AC power supply. The control circuit is electrically connected to the first charger and the second charger, and is configured to detect the capacities of the first battery and the second battery. The control circuit sets a first system power of the first charger to a first rated power, and sets a second system power of the second charger to be less than the first rated power. The control circuit enables the accelerated boost mode of the first charger and disables the accelerated boost mode of the second charger. When the acceleration boost mode is started, the alternating current power supply does not continue to charge the first battery and the second battery, so that the load obtains stable electric energy to operate.

The invention provides a power conversion storage device of a battery module and a storage method. The power conversion storage device comprises a power input interface; the power input interface is connected with the power storage module; the power conversion module comprises a rectifier and a DC-DC converter, the rectifier is used for converting alternating current power into direct current power, and the DC-DC converter is used for converting the direct current power into voltage and current stored by the battery. The power conversion and storage device of the battery module can effectively convert an external alternating current power supply into voltage and current suitable for battery storage. The power storage module is composed of a plurality of battery units which are connected in series or in parallel, voltage, current and temperature parameters are detected in real time through a sensor in the control module, charging management is carried out through a microprocessor, the safety and stability of battery charging are ensured, and the service life of the battery is prolonged. The microprocessor processes a power conversion storage voltage formula, the power conversion and storage process can be accurately controlled, and the power conversion precision and efficiency are improved.

The invention discloses a Panama power supply module and a battery cupboard, the Panama power supply module comprises a battery body, the battery body comprises a shell and an electric energy unit, and one end of the shell is provided with a power connection assembly; the control assembly can cut off / connect the electric connection between the power connection assembly and the electric energy unit, and at the beginning, the control assembly keeps the electric connection between the power connection assembly and the electric energy unit disconnected; and the energy storage assembly is arranged on the shell and provides trend force for controlling the assembly to communicate with the power connection assembly and the electric energy unit. In the plugging process of the battery body and the battery cabinet, the control assembly plays a key protection role. In the initial stage of plugging, the electrical connection between the power connection assembly and the electric energy unit is actively cut off, so that the resistance instability of a plugging port caused by plugging vibration is effectively avoided; after plugging is completed and a stable installation state is achieved, the energy storage assembly and the linkage assembly are used for precisely driving the control assembly to connect the circuit, smooth transmission of electric energy is ensured, stable electrification is achieved, and the electrical connection stability in the plugging process is greatly improved.

The application belongs to the technical field of micro-grid, and particularly relates to an AC / DC micro-grid system based on multi-power supply power fusion. The innovative dynamic flexible system reconstruction technology is used to realize multi-voltage level, multi-power path, multi-power supply power fusion operation and multi-path power guarantee of power load, real-time dynamic adjustment and control are carried out on multiple independent and controlled interconnected multiple double-voltage level AC / DC micro-grids of multi-power supply power fusion, which provides effective guarantee of system architecture for effectively suppressing fluctuation of new energy power, completing planned and unplanned switching of multi-power supply and realizing seamless switching of multi-power supply, greatly improves stability and safety of system power supply, and effectively solves the problem that power grid, new energy distributed power, self-provided power plant, emergency power and the like need to be reasonably and effectively fused and operated and provide stable and reliable power for AC and DC loads of different voltage levels in a certain power consumption area.

The invention discloses a three-dimensional measurement device and method for hydrological parameters of multi-layer underground water of a drill hole. The device comprises an in-hole stabilizing assembly, an electric telescopic supporting assembly, a driving device, a speed control assembly, a hydrological data acquisition assembly, a guiding structure, a ground surface depth control traction assembly, a control storage assembly and an energy supply assembly. The electric telescopic supporting assembly is installed at one end of the in-hole stabilizing assembly and provides longitudinal movement driving force for the hydrological data collecting assembly. The guide structure is used for guiding the longitudinal movement of the hydrological data acquisition assembly; the driving device provides driving force for the hydrological data acquisition assembly to rotate around the longitudinal direction through the speed control assembly; the hydrological data acquisition assembly acquires real-time hydrological information through azimuth and flow sensors; through the linkage of the electric telescopic supporting assembly, the driving device, the speed control assembly and the hydrological data acquisition assembly, the three-dimensional acquisition of the hydrological data of the borehole underground water is realized. According to the invention, long-time stable observation of rock stratum underground water with different drilling depths can be realized, and an important decision basis can be provided for foundation pit excavation, slope stability evaluation and reservoir engineering seepage prevention and leakage stoppage.

The utility model discloses a rotating speed and generating frequency non-coupling generator, which relates to the technical field of generators and comprises a motor spindle, a generator rotor, a generator stator and a full-power converter. According to the utility model, no coupling of the rotating speed and the generating frequency of the shaft generator is realized through the full-power converter, so that the generating frequency of the generator is not influenced by fluctuation of the rotating speed of a ship main shaft, stable and high-quality electric energy can be provided for a ship power grid, and the stability and reliability of a ship power system are effectively improved; the requirements of various electric equipment on the ship on stable electric power are met; the shaft generator provided by the utility model is compact in overall structure, convenient to install, and capable of effectively utilizing the space of a ship and reducing the occupied space of ship equipment; due to the efficient and stable power generation performance and the perfect protection control function, the operation cost and the maintenance cost of a ship power system are reduced, and the economical efficiency and the safety of ship operation are improved.