CN113323793A

CN113323793A - Ocean current power generation field based on single point mooring and utilizing tidal kinetic energy to generate power

Info

Publication number: CN113323793A
Application number: CN202110387148.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-08-31

Abstract

The invention relates to a green energy device, which utilizes inexhaustible kinetic energy (also called ocean energy) generated by ocean current movement caused by natural tide of the sea as an original power resource to generate electricity, adopts a single-point mooring device to solve the collision and energy storage of barge power generation equipment and ocean tidal current, and adopts a multi-group or matrix type mounted generator to generate 600V three-phase electricity under the action of the ocean current through a shaft sleeve (Heshang head) and perform 360-degree stepless disordered rotation along the single-point mooring along the tide whether rising tide or falling tide, and the electric energy is converged into an offshore power generation main field through a submarine cable after being boosted to 60KV through a single-point mooring electric slip ring and then is merged into a national power grid and transmitted to users.

Description

Ocean current power generation field based on single point mooring and utilizing tidal kinetic energy to generate power

Description abstract

Technical Field

The ocean current power plant can be used as an important supplement of a national green energy hydroelectric power generation branch, so that the initiated innovation concept, construction concept and green prospect provide a realistic possible and wide imagination space for energy regeneration. The mode is different from potential energy power generation modes of offshore wind power generation, seawater wave energy and damming water storage, and is also different from power generation modes of nuclear power, thermal power, photoelectricity and the like; the defects of high manufacturing cost, high installation difficulty and no wind or electricity of offshore wind power generation equipment are effectively overcome, the defect of small offshore wave energy generating capacity is also overcome, the defects of large scale, limitation and low efficiency of damming water storage power generation are overcome, potential hazards of nuclear power are eliminated, and carbon emission and light pollution cannot be generated. The ocean current power generation field forms potential energy by the directional flow of ocean current once every six hours, drives a generator to convert the potential energy into electric energy, a plurality of sets of equipment do work simultaneously, and powerful electric energy can be provided for a power grid.

Background

At present, the green energy acquisition modes in China are complex and various, and the technical maturity is different: the large wind power generation device is high in manufacturing and operating cost, high in technical requirement, high in installation and maintenance difficulty, long in effect period, capable of forming a huge and dead barrier for seasonally migrating birds and space eagles with strong desire, high in electricity price and not favored by users. The other green energy solar power generation device has large occupied area, and the energy loss of converting light energy into electric energy is large, so that certain light pollution is formed on the periphery. In the aspect of ocean wave energy power generation, certain attempts are made at home and abroad, mainly including three types of mechanical type, pneumatic type and hydraulic type, but the market application prospect is dim, large-scale construction cannot be achieved, and only the creative and experimental stages are remained.

According to published data, the geographical and hydrological conditions of the marine sea strait, the long estuary, the Taiwan strait, the Johnson State strait and the like in four sea areas in China are suitable for building a large-scale ocean current power plant. For example, the maximum flow velocity of coastal sea areas in Fujian province is 7 miles per hour, calculated by average flow velocity of 3M/S meters, the propeller with the diameter of 5 meters can be driven to drive the generator to generate 800 kilowatts, if one ocean current power generation field is simultaneously provided with 40 sets of ocean current generators, the average power of 32000 kilowatts per hour can be generated, calculated by 0.46 yuan per watt, and 235 and 520 yuan of RMB can be saved by 16 hours per day for one ocean current power generation field. By this calculation, the cost of an ocean current power plant can be saved by 85,964,800 ten thousand yuan all the year, and the construction cost can be recovered after the ocean current power plant is put into production for 6 years.

The invention is the continuous utilization of green renewable energy, the power source can not be exhausted, although the generated energy of a single power generation field is periodically changed between abundance and exhaustion (twelve hours is a period), in the power generation field power system with the same mode, a plurality of ocean current power generation fields can form the complementation of power fall at certain intervals (single point mooring is positioned at the seabed landing position according to the ocean current speed, the distance between the two power generation fields is about 11 nautical miles) so as to obtain the ideal situation of relative stability and power persistence; if the technology is applied on a large scale, immeasurable economic and social benefits can be generated, and the ocean value is contributed to the realization of carbon peak-reaching in China early.

Disclosure of Invention

The invention relates to a sea current power generation field based on single point mooring and utilizing tidal kinetic energy to generate power, which aims to solve the problem of sustainable utilization of the existing green energy.

The working principle of the large ocean current power plant is as follows (briefly described): multiple groups of propellers (screw shafts) arranged in a matrix form at the bottom of the stern are rigidly (flexibly) connected with corresponding generators, are boosted by an electric control system, flow through an electric slip ring of single-point mooring, and are converged into a main circuit of the sea water conservancy and power generation field, and finally are uniformly allocated to users by a national power grid.

The technical scheme adopted by the large ocean current power generation place is as follows: the system comprises four large systems, namely a single-point mooring device, a bridge block, a water surface anti-collision block, an anti-corrosion zinc block, a vertical shaft, a slip ring shaft, a balance head, a mooring locking pin and a cable fixing hole; the ocean current power generation system comprises a propeller, a spiral shaft, a main shaft, a connector, a flexible connector, a generator, a speed change gear box, a boosting tuning control system, an electric control system, a high-voltage transmission line and a sliding ring sleeve; and the third is a ship body connection control system, which comprises a ship body, a power distribution room (electric control system), a voltage transformation and boosting room, a monitoring operation room, an equipment maintenance room, a storage room, a living area, and left and right barge tug boat berthing ladders. And the fourth one is an assistant system which comprises a hydrometeorology detection system, a wind power emergency power generation and energy storage system, a small tower crane, a lightning arrester, a wind vane, a satellite antenna, a safety rail, an aircraft platform, a ballast device, a sea anchor emergency release system, a cabin forced ventilation system, a data transmission system, an emergency escape system (lifeboat raft), a beacon light, a fog light and an airspace warning light.

Drawings

FIG. 1: top view of ocean current power plant:

the figure is a distribution diagram of main equipment of a ship deck of a power plant, and shows that a ship is connected to a single-point mooring through a bridge device, facilities such as a connection control system, an auxiliary system and the like are installed above the ship deck, and the area of the ship is determined by the capacity of a generator. If the unmanned power plant is designed, living areas, lifesaving equipment and the like can be unnecessary to install.

FIG. 2: side view of ocean current power plant:

the figure takes a waterline as a base line, and divides a ship body into an upper part and a lower part, wherein the upper layer is a deck part, the lower layer is a cabin part and mainly comprises a ballast water tank, a generator cabin, a power transmission shaft, a propeller (shaft) and the like, the power transmission shaft can improve the rotating speed of a generator rotor through a planetary gear, and can also be flexibly connected to change the power transmission direction, so that the possibility that a single power plant obtains more wave energy through the propeller (shaft) is increased.

Fig. 3 is a schematic diagram of: schematic diagram of point mooring:

the single point mooring is a fixed point of a ship body, can rotate at any angle of 360 degrees, and determines the transverse traction force which can be borne by the single point mooring according to the sea condition of the sea area, the bearing capacity of the ship body, the force generated by the propeller (shaft) facing the waves and the like. Single point mooring may also employ a cylindrical steel body that is inserted into the sea floor in a pile-driving fashion. The single-point mooring has two main functions, namely, the single-point mooring receives the strength of a ship body resisting factors such as sea waves, ocean currents, wind power and flowing ice; and secondly, the electric energy of the power generation field is transferred to a national power grid through the slip ring.

FIG. 4: single point mooring and hull gap bridge diagram:

the gap bridge is a connector of a ship body and a single-point mooring, power of a power generation field and a national power grid, and needs enough safety and durability.

FIG. 5: mechanical and electrical two-way bridge diagram:

the gap bridge can be divided into a hard connecting device for a ship body and single-point mooring and a soft connecting device for power of a power generation field and a national power grid, wherein the hard connecting device meets the requirement that the ship body does circular motion, and simultaneously meets the requirement that the height difference formed by the ship body under the action of tide and wave can freely slide up and down; the soft connection part needs a compact joint surface, and meets the harsh conditions of the slip ring in the aspects of preventing 'damp, rust, abrasion' and the like and the physical conditions of barrier-free transmission of strong current.

Detailed Description

The hydrological condition investigation is carried out on the four sea areas in China, and the sea areas which have large tide fall, fast flow speed, no ice period and long no wind period, do not belong to the traditional fishing ground, have few marine organisms, proper water depth, do not belong to a navigation channel and do not have seabed obstacles are selected as the nidation points of the ocean current power plant.

The single-point mooring is firmly fixed at the implantation point through a large ocean engineering ship.

The well-built monomer power generation field ship towing single-point mooring landing point is connected with the single-point mooring implementation through a mechanical device and an electric device.

And debugging a single generator set installed in a ship body, and after the respective debugging is finished, carrying out internal grid connection through an electric control system, and merging the generator set into an external network (national power grid) after conditions are met.

Claims

1. An offshore ocean current power generation field based on single point mooring and utilizing tidal kinetic energy to generate power. The ocean current power plant is characterized in that potential energy (power resource) formed by natural tidal current of the sea is utilized to drive a generator, and the potential energy of the sea water is converted into electric energy to generate electricity; the single point mooring can be briefly described as a vertical shaft which is fixed at the bottom of the sea, is higher than the sea surface and can rotate by 360 degrees, the barge is connected to the single point mooring through a shaft sleeve (Heshanghu), a set of or matrix-type arranged power generation equipment is installed at the lower part of the barge, the ocean current power generation field has relative position stability and controllability on the sea, no matter tide rise and tide fall, a power generation field (installed on the barge) consisting of a plurality of sets of power generation equipment can perform 360-degree rotation along the single point mooring under the action of water flow, an electric slip ring rotating by 360 degrees is installed at the joint of the single point mooring and the barge at the same time, and the electric power generated by the power generation field is converted into a submarine cable through the electric slip ring to be intersected with the electric power of other ocean current power generation fields and then is merged into the national power grid.

2. The ocean current generator of claim 1, wherein: the power generation equipment is arranged at the bottom of the barge, an engine is driven to rotate under the action of seawater tidal potential energy by two modes (the two modes can be used in a superposition mode) of a propeller and a spiral shaft to generate 600V alternating current, the alternating current is regulated to 60KV (or the main road voltage of a national power grid) through a booster device arranged on the barge, the electric energy is converged into a main circuit of a marine current power generation field through a submarine cable by a single-point mooring slip ring, and the electric energy is merged into the national power grid under the control of an electric control system and is transmitted to a user.

3. The ocean current power plant of claim 1: the system comprises 1 single-point mooring, 2 electric energy bridging device electric slip rings, 3 connecting shafts (and a connecting head), 4 high-voltage transmission cables, 5 barge hulls (carrying generators, a power distribution system and the like), 6 power distribution system, 7 step-up transformers, 8 generators, 9 generator driving shafts, 10 propellers (spiral shafts) and the like.

4. The ocean current driven generator according to claim 1, wherein when the sea tide changes, a very large potential energy is generated in the flow of the sea water, which forms a driving force for the propeller (screw shaft) installed at the bottom of the hull and drives the generator to generate electric energy (multiple or matrix arrangement of power generation equipment operates simultaneously, which can increase the electric energy by multiple times, greatly improve the efficiency effect of the power generation field), and the electric energy is boosted by the power distribution system and the step-up transformer to 60KV transmission voltage, and then is transmitted by the electrical slip ring to the submarine cable to be converged into the main power grid, and finally is output to the user.

5. The generator of claim 1, wherein: during the tidal change of the sea water, the ship body is not interfered by external force and can rotate 360 degrees around the single-point mooring (the ship body can do disordered, stepless and undivided motion and does not influence the power generation effect when exceeding a period of rising tide and falling tide), and no matter the sea is in the rising tide or falling tide, the direction of the sea current still can be opposite to the ship body, so that the power generator is in a power output state, but the power moves forward along with the strength of the water; in the stationary phase (flat tide) of high tide and low tide, the propeller (screw shaft) does not do work, and the generator correspondingly does not generate electricity.

6. The single point mooring with legs inserted several meters deep into the sea floor of claim 1, in three modes, characterized by: 1. the abandoned offshore oil field is recovered through functions, the offshore oil field can be reused by single point mooring, 2, the diameter of a single cylindrical hole is more than 3 meters, and the offshore oil field is driven into the seabed by a pile driving ship by single point mooring: 3. four pile legs are taken as main parts, and the auxiliary pipes are welded to form single-point mooring with a narrow upper part and a wide lower part. The three single-point moorings are inserted into the safe depth based on scientific exploration below a seabed mud surface, the water line part of the single-point mooring is connected with an icebreaking cone (the sea area in the ice-free period can not be considered), the upper part of the single-point mooring is about four meters higher than the water line (determined by hydrological data of the sea area), a rotating shaft of a barge can be moored, an electric slip ring shaft is arranged above the rotating shaft, and a fixing nut and a safety pin are arranged on the upper part of the electric slip ring shaft.

7. The rotary bushing stack according to claim 1, wherein: the front end of the assembled frame is fixed on a rotary shaft sleeve (the head can do peripheral movement) through a head of the combined frame, and the shaft sleeve does stepless winding shaft movement on the rotary shaft. The rear end of the rotary shaft sleeve group frame is a male sleeve (two semi-circles with certain openings respectively) for connecting the barge. The upper part of the shaft sleeve is provided with an electric slip ring, and the high-voltage electricity is slipped to the submarine high-voltage cable through the carbon brush and is merged into a main power grid of the power generation field. The rotating shaft sleeve assembly functions as a connector of a single-point mooring barge, the barge rotates in an electrodeless way around the single-point mooring, the head of the barge is kept to be always against water flow on the premise of no collision, and the water flow passes through a propeller (a spiral shaft).

8. A barge according to claim 1 wherein: the ship body is provided with a plurality of cabins which are distributed according to functions, most cabins are ballast tanks, the penultimate row at the rear part of the cabin is a plurality of generator cabins which respectively protrude out of the bottom of the cabin, and the generators are connected with large-scale impellers through connecting shafts which are installed in parallel. The tail part of the ship body is provided with a plurality of same-type impellers. The third last row at the rear part of the cabin is a screw shaft generator system, and the generator is flexibly connected with the screw shaft (the length of the screw shaft and the diameter of an impeller) through a universal shaft and can be matched according to an impeller generator, so that the electric control system can be subjected to proper fine adjustment to realize electric networking.

9. The barge deck according to claim 1, wherein: 1. the manned power generation field: the main deck is provided with a distribution room (an electric control system), a voltage transformation and boosting room, a monitoring operation room, an equipment maintenance room, a hydrological meteorological room, a storeroom, a living area, a wind power emergency power generation and energy storage system, a small tower crane (an electric crane), a lightning arrester, a wind vane, a satellite antenna, a safety railing, an aircraft platform, a ballast observation hole, towing wheel berth ladders on the left side and the right side of a barge, an emergency release automatic anchoring system, a high-strength cabin forced ventilation system, a data transmission system and an emergency escape system (a lifeboat raft). 2. Unmanned on duty power plant: the main deck is provided with a distribution room (an electric control system), a voltage transformation and boosting room, a maintenance rest room, a wind power emergency power generation and energy storage system, a small tower crane (an electric crane), a lightning arrester, a wind vane, a satellite antenna, a safety railing, an airplane platform, a ballast observation hole, small barge left and right towing wheel berthing platforms, an emergency release automatic anchoring system, a high-strength cabin forced ventilation system, an emergency escape system (a life raft) and a data transmission system.