239 results about "Marine energy" patented technology

A fleet of vessels attached together longitudinally (rows), and transversely (columns) and operating in unison convert wave energy to electrical energy which is stored in either a chemical or electrical form. The vessels when detached from the fleet provide transportation to coastal or by navigable waterway ports of call for distribution to market centers. Both wind wave and swell wave energy conversion is performed by use of the differential motion between the vessels. Means are provided for the energy conversion systems to adapt to changes in wave direction, wave length, amplitude, and phase. Such vessels are self powered for off shore or inland waterway navigation, either singularly or in multiples, with which to deliver energy to other sea going vessels or to land based ports of call. Two or more of such vessels are capable of using the energy of waves during the delivery process. The fleet can maintain a designated geographical location by dynamic positioning. Alternatively, the fleet may maintain its designated position by moorage of a designated centrally located vessel in the fleet to a permanent anchoring system when operating at appropriate depths.

The invention provides a movable semi-submersible multifunctional marine energy supplying platform. The movable semi-submersible multifunctional marine energy supplying platform comprises a semi-submersible ship body with the middle portion provided with a main buoyancy cabin, a tidal current energy generating set is installed on the lower section of the main buoyancy cabin, the back portion of a deck of the semi-submersible ship body is provided with hinges which are connected with an energy absorbing floating body arranged above the main buoyancy cabin through supporting arms, the deck of the semi-submersible ship body is provided with a plurality of stand columns each of which is divided into three sections from bottom to top, the lower section of each stand column is provided with a tidal current energy generating set, the middle section of each stand column is provided with a buoyancy adjusting cabin, the upper section of each stand column is provided with an equipment cabin, and each equipment cabin is internally provided with an energy converting device, an energy storing storage battery set and the like. The top portions of all stand columns are connected with an abovewater platform which is provided with a plurality of wind energy generating sets, solar power generation panels and sea water desalting plants, and the output ends of all energy converting devices are connected with the storage battery sets. A wave energy converting element is hinged between the floating body and the semi-submersible ship body deck, and a water blocking plate is installed on the back portion of the semi-submersible ship body. The movable semi-submersible multifunctional marine energy supplying platform is low in cost, convenient to move and high in practicality.

The present invention discloses a switchable two-stage and cascade marine energy-saving ultralow-temperature refrigeration system which comprises a high-temperature level refrigeration system, a low-temperature level refrigeration system, a hot fluorine defrosting system of a high-temperature level air cooler and a hot fluorine defrosting system of a low-temperature level air cooler. The hot fluorine defrosting system of the high-temperature level air cooler comprises a high-temperature level compressor of which the outlet is divided into two paths through a first oil separator; and the second path is connected with an air suction port of the high-temperature level compressor through a first solenoid valve, the high-temperature level air cooler, a third solenoid valve, a first pressure relief valve, a first gas-liquid separator, a first one-way valve and a first heat regenerator. The hot fluorine defrosting system of the low-temperature level air cooler comprises a low-temperature level compressor of which the outlet is divided into two paths through a precooler and a second oil separator; and the second path is connected with an air suction port of the low-temperature level compressor through an eighth solenoid valve, the low-temperature level air cooler, a sixth solenoid valve. a second pressure relief valve, a second gas-liquid separator, a third one-way valve and a second heat regenerator. The present invention has the obvious effects of large refrigeration section, high cooling rate, good energy-saving effect and thorough defrosting.

The invention relates to a system for integrally exploiting marine energy resource, which is characterized in that the system comprises a wave energy power generation module, a traditional oil-gas production module, a marine temperature difference energy power generation module, a tide and ocean current underground power generation module, and a seabed natural gas hydrate exploitation module; thewave energy power generation module generates the power by the marine waves; the marine temperature difference energy power generation module generates the power by the marine temperature difference;the tide and ocean current underground power generation module generates the power by the tide and the ocean current; the traditional oil-gas production module, the wave energy power generation module, the marine temperature difference energy power generation module and the tide and ocean current underground power generation module share a living foundation equipment and a power foundation equipment, and share a drilling equipment and a seabed oil-gas conveying pipeline along with the seabed natural gas hydrate exploitation module; the electric energy output by the wave energy power generationmodule, the marine temperature difference energy power generation module and the tide and ocean current underground power generation module is externally output by the cables depending on the seabedoil-gas conveying pipelines; and the natural gas hydrate exploitation module exploits the natural gas hydrate by a ocean surface warm-water injection method and a carbon dioxide replacing method.

The invention relates to a wave energy power generation device, in particular to a pendulum wave energy power generation device, belonging to the technical field of ocean energy application. The pendulum wave energy power generation device structurally comprises a pendulum plate, a mechanical transmission mechanism for transmitting the swinging of the pendulum plate, a soleplate used for fixing the mechanical transmission mechanism, and a power generator for converting the mechanical energy in the mechanical transmission mechanism into electric energy. The pendulum plate is connected with the mechanical transmission mechanism through a pendulum plate shaft, and the mechanical transmission mechanism is connected with a motor shaft of the power generator through a coupler. According to the pendulum wave energy power generation device, absorption effect of full wave can be achieved by wave force acted on the pendulum plate through the mechanical transmission mechanism; the conversion efficiency is improved by a large margin; and the full absorption of the waves can be well realized and the power generation efficiency can be improved.

A marine energy hybrid includes a support structure locatable at or near the surface of a body of water and at least two of (a) a hubless upper carriage movable along an upper track of the support structure with at least one wind vane mounted at the upper carriage to induce motion of the upper carriage relative to the support structure by reaction with the wind stream, (b) a hubless lower carriage movable along a lower track of the support structure with at least one water vane mounted at the lower carriage to induce motion of the lower carriage relative to the support structure by reaction with the water current, and (c) at least one wave energy conversion device integral with the support structure and operable to generate electrical or mechanical power in response to wave motion of the body of water.

A method and an apparatus for desalinating sea water and generating with the sea energy resource. The method comprises: firstly collecting the sea surging energy by an energy collecting device, pressurizing the sea water with the collected energy by a sea water booster pump, producing the fresh water by inputting the sea water high pressure pipe to the sea water desalinating system; guiding the tail water with the high pressure after sea water desalination to a hydraulic generator for generating.

A marine energy hybrid includes a support structure locatable at or near the surface of a body of water and at least two of (a) a hubless upper carriage movable along an upper track of the support structure with at least one wind vane mounted at the upper carriage to induce motion of the upper carriage relative to the support structure by reaction with the wind stream, (b) a hubless lower carriage movable along a lower track of the support structure with at least one water vane mounted at the lower carriage to induce motion of the lower carriage relative to the support structure by reaction with the water current, and (c) at least one wave energy conversion device integral with the support structure and operable to generate electrical or mechanical power in response to wave motion of the body of water.

A hydroelectricity generating unit capturing marine wave energy and marine current energy is completed with a buoyant floating frame, a plurality of electric generating pontoons, and a floating frame mooring system. The buoyant floating frame is positioned underneath water and connected with a seabed by the floating frame mooring system and connected with the plurality of electric generating pontoons by a plurality of pontoon mooring systems. The buoyant floating frame includes marine current electric generating units which are rotatably connected within the buoyant floating frame and utilize the marine current energy to produce electricity. The plurality of electric generating pontoons also produces additional electricity by the flowing marine wave energy and marine current energy. A power farm can be constructed with multiple hydroelectricity generating units, where the multiple hydroelectricity generating units are interconnected with each other through a horizontal mooring system in order to provide additional stability.

The invention discloses an exploitation device of gas hydrate of a shallow water region and belongs to the technical field of marine energy exploitation. The exploitation device of the gas hydrate of the shallow water region comprises a casing pipe (1) and a sleeve (2) which is connected at the lower end of the casing pipe (1), the casing pipe (1) and the sleeve (2) are communicated, heating wires (3) are arranged inside the sleeve (2), and a cable (5) which supplies power to the heating wires (3) is arranged inside the casing pipe (1) and the sleeve (2). The exploitation device of the gas hydrate of the shallow water region can facilitate the exploitation of the gas hydrate of the shallow water region, and is relatively small in exploitation difficulty, simple in structure, low in cost of investment, easy and convenient to operate, and widely applicable to offshore oil and gas fields. The invention further discloses a method for exploiting the gas hydrate of the shallow water region by utilizing the exploitation device of the gas hydrate of the shallow water region.

The invention relates to a wave energy pump. The wave energy pump is characterized by comprising a plurality of wave energy collecting floating bodies, a plurality of connecting components used for connecting every two adjacent floating bodies, an anchoring device which is connected at the front end of a first floating body, a plurality of sea water pre-processing devices arranged in the floating bodies, and a high-pressure sea water post-processing device. A single-lug ring and a double-lug ring which are opposite to each two floating bodies are arranged on each connecting component and are connected through a pin shaft, and accordingly the adjacent floating bodies can freely swing in an up-and-down and left-to-right mode. A hydraulic cylinder and a piston rod are connected in each floating body through a ball hinged support, and wave energy is directly and efficiently converted into hydraulic energy by the full utilization of relative movement between every two adjacent floating bodies. The wave energy pump is convenient to assemble and disassemble, when sea circulations with bad wave conditions such as typhoon happen or when the wave energy pump needs to be examined and repaired, floating bodies and the first floating body can be disconnected on the water surface, and the wave energy collecting floating bodies are dragged and transported to a safe sea area to avoid risks or to be examined and repaired. The wave energy pump supplies efficient hydraulic power for sea water desalination, power generation and the like, and can be widely applied to the process of developing sea energy.

The invention belongs to the technical field of ship power generation and relates to a ship power generation device utilizing ocean energy. The ship power generation device utilizing the ocean energy comprises a ship body. Water bags made of elastic materials are arranged on the two sides of the ship body and contain liquid. A water flow generator is arranged on the ship body, and the water bags on the two sides of the ship body are connected with the water flow generator through water pipes. The ship power generation device further comprises a base which can be fixed to a wharf, and the base is connected with the water bags on one side. After a ship provided with the ship power generation device utilizing the ocean energy berths on the wharf, flowing of wave in the horizontal direction will impact the water bags on one side of the ship body, and as the water bags on the other side are connected with the base, water in the water bags on one side of the ship body can flow into a blade cavity of the water flow generator through the water pipe, and blades are driven to rotate to achieve power generation. According to the ship power generation device utilizing the ocean energy, the wave energy can be utilized when the ship approaches a shore, and the energy utilization rate is increased.

The invention relates to the technical field of underwater vehicles and discloses a wave propeller. The wave propeller comprises an underwater marching device and a water surface follow-up device connected with each other by a connecting device, wherein the underwater marching device comprises a bracket and a pair of paddles, the pair of paddles are symmetrically fixed on the two sides of the bracket by a fixed shaft and can rotate synchronously around the fixed shaft. The wave propeller disclosed by the invention can make full use of marine energy, so that the voyaging capacity of the wave propeller is improved, and the operational requirements of various water areas are met.

The invention discloses a movable floating breakwater with an oscillation water column type wave energy conversion device, and belongs to the field of ocean energy utilization. The movable floating breakwater consists of multiple floating breakwater modules; and the modules are elastically connected to realize independent movement and of each module and power generation, and can form a floating breakwater power generation pasture. Single floating breakwater module comprises a square box, a power generation device, a connecting device and a mooring system. The multiple modules are elastically connected through connecting devices. The movement of a floating body is caused by a wave motion to cause movement of a fluid in a power generation cabin, so that the air pressure at the upper part ofthe cabin is continuously changed; the air pressures on the two sides of a turbine are different to form reciprocating air currents; kinetic energy of gas is converted to mechanical energy through anair turbine; and the mechanical energy is converted to electric energy through a generator. The floating breakwater and a wave energy power generation device are fused to realize covering of offshoreocean structures and to generate the electric energy to achieve the advantages of capability of moving and repeating, no limitation from the water depth and the geology and the like; and the movable floating breakwater is simple in structure, easy to produce and maintain, free of pollution to the marine environment and broad in application prospect.

A hydroelectricity generating unit capturing marine wave energy and marine current energy is completed with a buoyant floating frame, a plurality of electric generating pontoons, and a floating frame mooring system. The buoyant floating frame is positioned underneath water and connected with a seabed by the floating frame mooring system and connected with the plurality of electric generating pontoons by a plurality of pontoon mooring systems. The buoyant floating frame includes marine current electric generating units which are rotatably connected within the buoyant floating frame and utilize the marine current energy to produce electricity. The plurality of electric generating pontoons also produces additional electricity by the flowing marine wave energy and marine current energy. A power farm can be constructed with multiple hydroelectricity generating units, where the multiple hydroelectricity generating units are interconnected with each other through a horizontal mooring system in order to provide additional stability.

The invention discloses a superlarge floating platform based on modularizing and hybrid mooring, and belongs to the field of marine energy resource utilization. The superlarge floating platform comprises a central large platform module, a small platform module, a tension leg system, an anchor chain system, an oscillating floater type wave energy power generating device and module connecting components. The oscillating floater type wave energy power generating device converts the swinging of a floater into the horizontal movement of a piston rod in a gear and rack transmission mode and drives amotor of a bidirectional hydraulic power generation system to generate power. The module connecting components are divided into two modes according to the sizes of the connected platform modules, power generation is realized through the relative torsion and horizontal bidirectional movement between small platforms and large platforms and the relative torsion between the small platforms, and the relative movement between the modules is relieved when energy supply is obtained. The wave energy device outside the superlarge floating platform can provide energy supply through incident wave energyand can also effectively weaken the incident wave loads and reduce the movement response of the platform; by means of a hybrid mooring system with the tension leg system and the anchor chain system, the safety and stability of the whole platform can be ensured.

The invention discloses a submarine cable joint of different armoured structures and an online transition process therefor. The submarine cable joint comprises a cable core, an asphalt coating layer, a cable type transmission end, an adhesive tape and an outermost coating layer from interior to exterior in sequence; the cable core passes through the overall submarine cable; the cable core in the joint of the cable type transmission end is coated with the asphalt coating layer; the cable type transmission end comprises an A cable type transmission end and a B cable type transmission end; and a steel wire end in the junction of the A cable type transmission end and the B cable type transmission end is further sleeved with a connecting pipe. According to the online transition process provided by the invention, the transition connection of different cable types are finished online by adopting the production way of a whole piece of cable core; the process is simple and convenient, and the production efficiency is high; the produced transition submarine cable has no joint in the cable core, so that the fault rate is reduced, and the reliability of the submarine cable is improved; the joint is welded by steel wires, so that the submarine cables are connected firmly without expanding the size of the joint; therefore, the use and the installation of the submarine cables are convenient, and the installation cost and the installation difficulty are reduced; and meanwhile, the development for marine energy resources, and the influences on the lives of residents and the safety of the countries in coastal areas and islands are reduced.

The invention discloses a marine energy resource generation monitoring device. The marine energy resource generation monitoring device comprises a generator and electricity processing module and a detection module, wherein the generator and electricity processing module comprises a direct drive type sea wave generator, an electricity output end of the direct drive type sea wave generator is connected to an input end of a rectifier, an output end of the rectifier is divided to two paths, one path is connected to a charger through a relay I, the charger is connected to a storage battery through a relay 2, the storage battery is connected to an inverter / converter through a relay 3, and the other path is connected to a discharging resistor through a relay 4. The detection module comprises a voltage current signal sampling unit, a fault analysis processing module, a wave recording storage unit and a relay set control unit, and the electricity needed by the detection module is provided by the direct drive type sea wave generator. According to the marine energy resource generation monitoring device, when small faults occur, a wave recoding and feedback alarming method is adopted, and when large faults occur, a direct cutting-off loop, wave recording and alarming method is adopted, so that a control operator can judge the faults and deals with the faults according to the wave shapes of points of a system.

A vertical wing tip air injection waves tide wind-driven generator includes tower and wind-driven generator unit installed on it. The tower is equipped with base shell under itself, its bottom surface is equipped with left and right lock valve mouth and its inside is equipped with float connecting with piston, the cylinder of air compressor matched with piston is nested on the base shell, the tower is combined with wind transmitting-back pipelines which are connected with change-over valve and air compressor cylinder jacket, the change-over valve is connected with wind-backing and wind inlet cavity, the wind-backing and wind inlet cavity are connected with the air injection machine installed on the blades in wind-driven generator unit. The wind-driven generator unit can generate using original wind energy, and also can generate using the energy in marine, it overcomes the shortcomings of only generating by using wind energy in prior technologies, the wind energy and the marine energy are complementary each other, the generator unit can work continuously can generates leaning on the marine energy; it has the advantages of simple integral structure, safety, reliability, high efficiency and low manufacturing cost.

The invention discloses a marine absorption refrigeration air conditioning system and a working method thereof. The system comprises an absorption refrigeration unit, a waste heat recycling loop and a seawater loop. The method comprises the steps that when cold supplying is conducted in summer, ship main and auxiliary engine cylinder sleeve cooling water is taken as a heat source for a generation cavity of the absorption refrigeration unit, and seawater is taken as a cold source for an absorption cavity and a condensation cavity in the loop; when heat supplying is conducted in winter, heat supplying is achieved by directly taking the cylinder sleeve cooling water as a heat source. According to the marine absorption refrigeration system, a traditional marine compression type refrigeration system is replaced, therefore, consumption of a marine air conditioning system on marine power is effectively reduced, marine waste heat and exhaust heat are fully utilized, the heat efficiency is increased by about 20%, and the overall marine energy source utilization efficiency is greatly improved.

The invention discloses a tension leg platform based vertical axis wind turbine and vertical-horizontal two-direction wave power generation integrated structure, and belongs to the field of ocean energy utilization. The integrated structure comprises a vertical axis wind turbine, a two-direction wave power generation device, two-direction hydraulic power generation systems located in the two-direction wave power generation device, a tower structure, a tension leg platform structure and a matched power transmission system. Relative vertical motion of the two-direction wave power generation device and the tower structure drives a vertical piston (or relative horizontal motion drives a horizontal piston) to compress liquid in hydraulic cylinders, the liquid passes through first unidirectionalinflow valves (or passes through second unidirectional inflow valves in the reverse direction) to enter hydraulic motors, the hydraulic motors are driven to rotate, and therefore power generation devices are driven to generate power. In addition, tension leg structures can effectively control longitudinal shaking and transverse shaking of a floating platform, good operation of a top fan is facilitated, and huge tower bending moment loads caused by top large-mass cabin inertial motion are controlled.

The invention relates to a float unit and a combined water platform. The float unit comprises a float body, a bearing body and a ballasting device; the ballasting device comprises a balancing weight and a water inlet-drain device; the water inlet-drain device comprises a pump and a float unit water inlet-drain connector, the float unit is subsided or lifted by injecting or ejecting an approximate amount of water; when the float body suspends underwater, at least one part of the bearing body exposes and is kept on the water; the float unit is provided with a generating device, the water platform formed by the float unit is formed by the connection of a plurality of float units. The float unit is lower in manufacturing cost, high in intensity, and convenient to install and construct in a large area; the float body suspends below the sea surface and can be slightly affected by stormy waves, and a wavy generating device can restrain the rocking function of sea waves, and has a capacity of resisting against severe sea conditions. According to the float unit and the combined water platform provided by the invention, the marine energy in large area can be acquired, the generating cost can be reduced, and the comprehensive generating efficiency can be improved, therefore a feasible solution can be provided for the development and use of ocean energy resources in a large-scale and commercial way.

The invention relates to a central float type wave energy power generation device which is used for power generation of wave energy and belongs to the technical field of ocean energy utilization. The central float type wave energy power generation device structurally comprises a big central float body, connection bodies, and a plurality of independent oscillation type wave energy converting devices which are distributed around the big central float body, wherein the oscillation type wave energy converting devices are connected with the big central float body through connection rods and connection bodies. The big central float body of the power generation device does heaving movement in wave; the plurality of independent oscillation type wave energy converting devices around the big central float body are similar to a traditional wave energy absorption device and can independently absorb and convert the wave energy. When the heaving natural frequency of the big central float body is equal or close to the movement frequency of the wave, the big central float body and ocean water resonate, then the wave drives the big central float body to move violently, the oscillation of the big central float body is transferred to each wave energy converting device through the connection rods, and the oscillation movement is amplified; and the central float type wave energy power generation device has a high absorption rate, a high conversion rate and high impact resistance.

The invention belongs to the technical filed of marine energy resource development and utilization, and particularly relates to a shore-based type wave energy power generation system adapted to tide level variation. The system comprises a shore base, a guide chute and a sliding device, wherein the shore base is arranged on a shore; the guide chute is longitudinally fixed on the shore base; the sliding device can slide vertically along the chute; a break device is configured at the top of the sliding device; a vertical pressure sensor is mounted at the bottom of the break device; the sliding device is fixed on a foundation framework; a plurality of floating boxes are embedded into the foundation framework and are hinged with the foundation framework through float arms; and main equipment of the power generation system is mounted on the shore base. The power generation system is arranged on the shore, so that the maintenance is facilitated, and at the same time, the security and the stability of a generator set are improved greatly; and the work of the power generation system doesn't need manual operation, under the condition that external energy is utilized as little as possible, working heights of floats are adjusted with the tide level variation timely, the reliability is high, the power generation cost is low, and competitiveness of the development and utilization of wave energy is improved greatly.

A floating at sea or beached structure having hydraulic power cells capable of capturing, dissipating and distributing wave action energy comprising flexible mats with energy capture cells all preferably constructed of elastic structural and, where necessary, flotation materials with distributed energy being in the form of a pressurized hydraulic stream.

The invention discloses a marine data collecting gateway. The marine data collecting gateway is used for collecting energy consumption data of a lower computer and sending the energy consumption data to an upper computer to be processed. The marine data collecting gateway comprises a power module, a data collecting module, an MCU processor module, a data storage module and an upper computer interface module. The power module is used for providing a power source for all modules. The data collecting module is electrically connected with the lower computer and the MCU processor module. The MCU processor module is electrically connected with the data storage module and the upper computer interface module, and the upper computer interface module is used for being electrically connected with the upper computer. The marine data collecting gateway further comprises an SAM module used for carrying out permission authentication and data encryption. The invention further provides a data collecting method. An SAM is applied to marine energy consumption data communication, information data of the marine data collecting gateway can be encrypted through the identity authentication on the upper computer, the solidified encryption algorithm and a secret key, and therefore the confidentiality and integrity of the marine energy consumption data can be ensured.

The invention relates to an anti-explosion lamp, in particular to a marine anti-explosion lamp, which belongs to the field of lamps. A lamp shell meets the specific using requirements of electrical equipment in an explosive gas environment, makes the anti-explosion level of products reach dIICT6 and makes the protection level reach IP66. Drive power modules are fixedly arranged in the closed cavity of the lamp shell, and a light-emitting diode (LED) light-emitting module is fixedly arranged in a semitransparent light-emitting cavity and is connected to the output ends of the drive power modules through wires. By the marine anti-explosion lamp, the LED is applied to marine illumination, the conventional high-energy consumption and short-service-life marine illumination lamps are replaced, energy resources are saved, the amount of maintenance is reduced, the marine energy consumption is reduced, and the marine cruising ability is improved; and the marine anti-explosion lamp has extremely important significance of improving force fighting capacity.

The invention relates to a diversion cover type elliptical orbit vertical-axis tidal current energy hydraulic turbine generator set, and belongs to the field of utilization of ocean energy. The generator set is characterized by comprising a diversion cover, a guide rail support, an elliptic guide rail, linear bearings, guide arms, straight blades, fixing bolts, a radial bearing, a rotating shaft, a wheel disc, a radial thrust combined bearing, a sealing ring, a supporting frame, an electric brake, a seal box, a gearbox, a generator, a storage battery, a controller, balls, a sliding block, blade bearings and a guide hole. According to the generator set, an energy gathering effect on tidal current energy is improved by the diversion cover, the length of the arm can be changed elliptically through the elliptic guide rail, and the elliptic guide rail can be conveniently arranged on the diversion cover. The generator set has a simple and reliable structure, and the length of the arm is changed in a non-circular mode, so that the capture efficiency of the tidal current energy is improved, and operation reliability and operation stability are improved.

The invention relates to a stable power generation method for converting multiple kinds of ocean energy into usable electric energy. The devices employed in the method include an auxiliary oil tank, a wind wheel, a coupling, a constant delivery pump, a check valve, an energy stabilizing device, a flow valve, a hydraulic constant displacement motor, a common alternating current generator, an electromagnetic overflow valve A and an electromagnetic overflow valve B. The constant delivery pump is connected to the auxiliary oil tank and the coupling is connected to the constant delivery pump; the coupling is connected with the wind wheel; a pipeline on the other end of the constant delivery pump is connected with the check valve; the energy stabilizing device is connected to a pipeline on the other end of the check valve; the energy stabilizing device is connected with the electromagnetic overflow valve A and the electromagnetic overflow valve B; the flow valve is connected to a pipeline of the other end of the energy stabilizing device; the flow valve is connected with the hydraulic constant displacement motor; the hydraulic constant displacement motor is connected with the common alternating current generator. The method can convert unstable ocean energy into usable electric energy, is simple and feasible, reduces the production and power generation costs, increases the ocean energy utilization rate and is wide in application range.