CN211006583U

CN211006583U - Complementary joint power generation device of water light

Info

Publication number: CN211006583U
Application number: CN201820581270.XU
Authority: CN
Inventors: 李先才; 李琪琦
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-04-23
Filing date: 2018-04-23
Publication date: 2020-07-14
Anticipated expiration: 2028-04-23

Abstract

The utility model relates to a new forms of energy technical field discloses a complementary cogeneration device of water light, the device includes: the system comprises a photovoltaic power station, a hydropower station and a control and regulation device; the photovoltaic power generation station comprises at least one overwater photovoltaic module, the photovoltaic module is arranged on the water surface of a water storage reservoir area of the hydropower station through water surface floating equipment, a power transmission line of the photovoltaic power generation station is combined with an outgoing grid-connected line of the hydropower station, the control and adjustment device is respectively connected with the photovoltaic power generation station and a hydroelectric generating set of the hydropower station, and the control and adjustment device is used for comprehensively controlling the operation of the photovoltaic power generation station and the hydroelectric generating set. The utility model provides a complementary combined power generation facility of water light utilizes hydroelectric power generation reservoir area waters area to build centralized surface of water photovoltaic power generation station, has saved a large amount of rare land resources, has reduced the environmental damage that brings from this; and the adverse impact of unbalanced on-grid power of a large amount of distributed photovoltaic power generation on a power grid is overcome by controlling the adjusting device.

Description

Complementary joint power generation device of water light

Technical Field

The utility model relates to a new forms of energy technical field especially relates to a complementary cogeneration device of water light.

Background

Compared with a common thermal power generation system, the photovoltaic power generation system has huge potential due to the advantages of no exhaustion danger, safety, reliability, no pollution emission, no limitation of resource distribution regions, short construction period, short acquisition and cost time and the like. Due to the unique advantage of solar energy, the variety of solar cells is increasing, the application range is becoming wider, and the market scale is gradually enlarged.

Photovoltaic power generation also has some inherent disadvantages: due to the low light energy density, there must be sufficient area to lay the photovoltaic panels. However, the existing large-scale centralized photovoltaic power station is built in the west desertification areas with rare people, and the middle east areas are dense in population and scarce in land, so that the power station cannot be utilized in a large scale due to insufficient land resources. In addition, the sunlight is affected by the influence of the sunshine all the year round and night and the influence of the sunshine causes unbalanced power generation, which causes the problems of large construction investment, high operation cost and difficult maintenance; in addition, the impact of unbalanced load on the power grid is large, which is one of the reasons that vast idle land resources exist in western regions, the sunlight irradiation condition is good, but the full utilization cannot be realized, and even if high-voltage and ultrahigh-voltage power transmission lines are built in future, the limitation is still caused.

The redundant photovoltaic power generation quantity in the west can be transmitted to the east with large demand by depending on a remote power transmission and distribution system, but the investment is huge, the construction period is long, the remote transmission loss is huge, and the people are difficult to feel thirsty when the people go to water. At present, three photovoltaic power stations in western China are not connected to the grid at present, sufficient power generation cannot be guaranteed even if the photovoltaic power stations are connected to the grid, many power stations are required to generate power only every other day, and the phenomenon of light abandonment is serious.

However, in the current photovoltaic power generation process, a large amount of land is not provided for installing photovoltaic power stations in east and middle areas; in addition, the impact balance of a large amount of unbalanced photovoltaic power generation on the power grid is also a great problem.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model aims at providing a water-light complementary combined power generation device which is used for solving the problem that no large amount of land is provided for installing a photovoltaic power station in the east and middle areas at present; in addition, a large amount of unbalanced photovoltaic power generation amount impacts a power grid in a balanced manner when the power grid is connected with the power grid.

(II) technical scheme

In order to solve the technical problem, the utility model provides a complementary cogeneration device of water light, the device includes: the system comprises a photovoltaic power station, a hydropower station and a control and regulation device; the photovoltaic power generation station comprises at least one overwater photovoltaic module, the photovoltaic module is arranged on the water surface of the water storage area of the hydropower station through a water surface floating device, a power transmission line of the photovoltaic power generation station is combined with a delivery grid-connected line of the hydropower station, the control and regulation device is respectively connected with the photovoltaic power generation station and a hydroelectric generating set of the hydropower station, and the control and regulation device is used for comprehensively controlling the operation of the photovoltaic power generation station and the operation of the hydropower station.

On the basis of the scheme, the photovoltaic power station further comprises: a photovoltaic switchyard; the photovoltaic switch station is arranged on the power transmission line and used for controlling the transmission of photovoltaic power generation.

On the basis of the scheme, the photovoltaic power station further comprises: a combiner box, an inverter and a first transformer; the junction box and the inverter are arranged on the water surface, the first transformer is arranged on the water surface or on the shore, the photovoltaic assembly, the junction box, the inverter and the first transformer are sequentially connected through cables, and the output end of the first transformer is connected with the photovoltaic switch station.

On the basis of the above scheme, a complementary cogeneration device of water light still includes: a pump unit; the water pumping pump set is arranged at the downstream of the water storage area and is used for pumping water at the downstream of the water storage area to the water storage area.

On the basis of the scheme, the power supply of the water pumping pump unit is connected with the service power system of the hydropower station.

On the basis of the above scheme, a complementary cogeneration device of water light still includes: rapidly starting the hydroelectric generator set; and the output line of the quick-start hydroelectric generating set is combined with the delivery grid-connected line of the hydropower station.

On the basis of the above scheme, the hydropower station further comprises: a second transformer; the second transformer is arranged between the hydroelectric generating set and the delivery grid-connected line.

On the basis of the scheme, the water surface floating equipment is fixed on the water surface through anchoring and a shore fixing steel cable, the water surface floating equipment comprises a photovoltaic floating platform, and the photovoltaic assembly is fixedly arranged on the photovoltaic floating platform.

On the basis of the scheme, the water surface floating device further comprises a second floating platform, and the combiner box, the inverter and the first transformer are placed on the second floating platform.

(III) advantageous effects

The utility model provides a complementary combined power generation set of water light, through utilizing the power station to store the surface of water in the reservoir district and construct surface of water photovoltaic power generation station, and utilize the power station to send out the grid-connected line and see out photovoltaic power generation station electric power, greatly reduced the huge investment that centralized photovoltaic power generation station built the transmission line alone, through the device, thoroughly solved the photovoltaic power generation station can only be in western for example desertification soil construction ground photovoltaic power generation station, but the electric power transmission cost is very high, need not transport far away to the middle, eastern area loss is huge; or a distributed water surface photovoltaic power station is built in a pond, a reservoir or a ponding area of a mining subsidence area in the middle east region for digestion nearby or grid connection; or the distributed photovoltaic power generation devices are built by utilizing houses, factory buildings, building roofs and the like to generate electricity, so that the generation is digested nearby or the distributed photovoltaic power generation devices are connected to the grid, and the like, which are not scaled; the centralized water surface photovoltaic power station is built by fully utilizing the wide water area of the reservoir area caused by abundant hydroelectric generation resources, so that a large amount of rare land resources are saved; the environmental damage caused by the construction of the ground photovoltaic power station by occupying land resources is reduced, and the same-area greening benefit is obviously reduced.

The output of the hydroelectric generating set of the hydropower station is controlled by controlling the adjusting device, so that the electric power output by the combined generating set is relatively balanced, and the adverse impact of unbalanced on-line electric power of a large amount of distributed photovoltaic power generation on a power grid is overcome. The combined power generation device brings new development opportunities of solar photovoltaic power generation.

Drawings

Fig. 1 is a schematic view of an overall structure of a complementary cogeneration unit of water and light according to an embodiment of the present invention;

fig. 2 is a schematic connection diagram of components in a hybrid water-light cogeneration apparatus according to an embodiment of the present invention;

fig. 3 is a schematic connection diagram of a water pump unit in a hybrid water-light complementary power generation device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a water pump unit in a water-light complementary combined power generation device according to an embodiment of the present invention;

fig. 5 is a schematic connection diagram of a quick start hydro-generator set according to an embodiment of the present invention;

fig. 6 is a schematic connection diagram of a water pump unit and a quick start hydro-electric generating set according to an embodiment of the present invention.

Description of reference numerals:

1-a hydropower station; 2-reservoir area; 3-a photovoltaic module;

4-a combiner box; 5-an inverter; 6-a first transformer;

7-photovoltaic switching station; 8, power transmission line; 9-outgoing grid-connected line;

11-water pump unit; 12-a grid system; 10-a second transformer;

13-quick start hydroelectric generating set.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

This embodiment is according to the utility model provides a complementary cogeneration device of water light, referring to fig. 1, this cogeneration device includes: a photovoltaic power station, a hydropower station 1 (comprising a reservoir dam, a hydroelectric generating set and a power distribution device) and a control and regulation device; the photovoltaic power generation station comprises at least one overwater photovoltaic module 3, the photovoltaic module 3 is arranged on the water surface of the reservoir area 2 of the hydropower station 1 through a water surface floating device, a power transmission line 8 of the photovoltaic power generation station is combined with a delivery grid-connected line 9 of the hydropower station 1, the control and regulation device is respectively connected with the photovoltaic power generation station and a hydroelectric generating set of the hydropower station 1, and the control and regulation device is used for comprehensively controlling the operation of the photovoltaic power generation station and the operation of the hydropower station 1.

The embodiment provides a water-light complementary combined power generation device, and aims to provide a technical scheme of a large or ultra-large centralized photovoltaic power station which can solve the problems of land occupation, impact on a power grid and low-investment construction.

In the combined power generation device, a centralized photovoltaic power generation station is built on the water surface of a water storage area 2 of a hydropower station 1, and a photovoltaic module 3 is fixed through a water surface floating device to form a water-light complementary combined power generation device. The power transmission line 8 of the generated energy output by photovoltaic power generation and the outgoing grid-connected line 9 of the generated energy output by the hydropower station 1 to the power grid system 12 are combined, the photovoltaic power generation load is on the internet nearby, the outgoing grid-connected line 9 of the hydropower station 1 is used for outputting, and no extra grid-connected line needs to be laid.

The control adjusting device is arranged in the combined power generation device and can comprise a controller, the controller is respectively connected with the photovoltaic power station and the hydroelectric generating set, the controller can respectively control the start and stop of the photovoltaic power station and the hydroelectric generating set, and the controller can be remotely and intelligently controlled.

The control and adjustment device mainly controls the generating capacity of the hydroelectric generating set according to the generating capacity of the photovoltaic module 3. The output of the hydroelectric generating set of the hydropower station 1 is reduced when the photovoltaic power station generates power, and the output of the hydroelectric generating set of the hydropower station 1 is increased when the power generation load of the photovoltaic power station is reduced or the power generation is stopped, such as in rainy days or at night. By controlling the adjusting device, the total generated energy of the photovoltaic power station and the hydropower station 1 can be kept stable without causing large fluctuation.

According to the water-light complementary combined power generation device provided by the embodiment, the water surface photovoltaic power station is built on the water surface of the water storage area 2 of the hydropower station 1, and the power of the photovoltaic power station is sent out by the out-sending grid-connected line 9 of the hydropower station 1, so that the huge investment of a centralized photovoltaic power station for independently building a power transmission line is greatly reduced; by the device, the problem that the photovoltaic power station can only be used for building a ground photovoltaic power station in the west part such as desertification land, but the power transmission cost is very high, and the power station needs to be transmitted to the middle and east parts in a long distance and has huge loss is thoroughly solved; or a distributed water surface photovoltaic power station is built in a pond, a reservoir or a ponding area of a mining subsidence area in the middle east region for digestion nearby or grid connection; or the distributed photovoltaic power generation devices are built by utilizing houses, factory buildings, building roofs and the like to generate electricity, so that the generation is digested nearby or the distributed photovoltaic power generation devices are connected to the grid, and the like, which are not scaled; the centralized water surface photovoltaic power station is built by fully utilizing the wide water area of the reservoir area caused by abundant hydroelectric generation resources, so that a large amount of rare land resources are saved; the environmental damage caused by the construction of the ground photovoltaic power station by occupying land resources is reduced, and the same-area greening benefit is obviously reduced.

The output of the hydroelectric generating set 1 of the hydropower station is controlled by controlling the adjusting device, so that the electric power output by the combined generating set is relatively balanced, and the adverse impact of unbalanced on-line electric power of a large amount of distributed photovoltaic power generation on a power grid is overcome. The combined power generation device brings new development opportunities of solar photovoltaic power generation.

On the basis of the scheme, the photovoltaic power generation station further comprises: a photovoltaic switchyard 7 (comprising a step-up transformer which may be provided as required); and the photovoltaic switching station 7 is arranged on the power transmission line 8 and is used for controlling the transmission of photovoltaic power generation.

The present embodiment is further explained based on the above-described embodiments with respect to the specific arrangement of the photovoltaic power plant. And a photovoltaic switch station 7 is arranged to control the transmission of the power generated by the photovoltaic component 3. The power transmission line 8 is a line which is combined and connected with the delivery grid-connected line 9 of the hydropower station 1 after power generated by the photovoltaic module 3 is collected, inverted and boosted. The photovoltaic switchyard 7 may be arranged on the transmission line 8.

The photovoltaic switchyard 7 is located onshore.

The control and regulation device can be connected with the photovoltaic switch station 7 to control the photovoltaic power station.

On the basis of the above scheme, further, referring to fig. 2, the photovoltaic power plant further includes: a combiner box 4, an inverter 5, and a first transformer 6; the junction box 4, the inverter 5 and the first transformer 6 are arranged on the water surface or on the shore, the photovoltaic module 3, the junction box 4, the inverter 5 and the first transformer 6 are sequentially connected through cables, and the output end of the first transformer 6 is connected with the photovoltaic switch station 7.

The present embodiment is further explained based on the above-described embodiments with respect to the specific arrangement of the photovoltaic power plant. The photovoltaic modules 3 on the water surface are connected with the combiner box 4, and the power generated by each photovoltaic module 3 is collected through the combiner box 4. The combiner box 4 is connected to an inverter 5, and the inverter 5 is connected to a first transformer 6. The first transformer 6 is connected to a photovoltaic switchyard 7. The photovoltaic switchyard 7 is connected to the transmission line 8.

The power generated by the photovoltaic module 3 is converted into alternating current by the inverter 5, so that the power can be supplied to a power grid conveniently. The power generated by the photovoltaic module 3 is boosted and sent to the photovoltaic switch station 7 through the first transformer 6, and is sent out after being connected with the power generated by the hydropower station 1 in a grid mode through the photovoltaic switch station 7.

The combiner box 4 and the inverter 5 are disposed on the water surface. The first transformer 6 may be disposed on the water surface, or may be disposed on the shore on both sides of the reservoir region 2, which is not limited thereto. Preferably, in order to reduce the loss in the power transmission process and minimize the laying of cables, the combiner box 4, the inverter 5 and the first transformer 6 are arranged on the water surface, and are close to the photovoltaic module 3, so as to be convenient for cable connection.

The photovoltaic module 3, the combiner box 4, the inverter 5 and the first transformer 6 can be arranged as far as possible in consideration of the areas of water areas such as stable runoff, low wind speed, good illumination conditions, small water level change, good development conditions, no influence on shipping, ecological non-sensitive areas and the like.

On the basis of the above scheme, further, referring to fig. 3 and 4, the water-light complementary combined power generation device further comprises: a water pump unit 11; the water pump set 11 is arranged at the downstream of the water storage area 2, and the water pump set 11 is used for pumping the water at the downstream of the water storage area 2 to the water storage area 2.

On the basis of the above scheme, further, the power supply of the water pump unit 11 is connected with the service power system of the hydropower station 1.

Based on the above embodiment, the present embodiment is provided with a water pump unit 11 for digesting a part of the surplus electric power nearby. When the installed capacity of the overwater photovoltaic power station installed in the available water area of the hydropower station 1 is close to or larger than the installed capacity of the hydropower station 1, the water pump unit 11 can be configured to consume part of the surplus electric quantity nearby.

The pump unit 11 may be arranged at a position downstream of the reservoir area 2. The water pump set 11 can pump the downstream water to the water storage area 2 by using the surplus electric quantity, so that the combined power generation device has the function of water pumping and energy storage, the output power load of the combined power generation device is relatively balanced, and the stability of the generated energy is maintained.

The water pump unit 11 may be connected to the service system of the hydroelectric power station 1 for power supply. The water pump set 11 can also be powered by the power generated by the photovoltaic module 3.

On the basis of the above scheme, further, referring to fig. 5, the water-light complementary cogeneration apparatus further includes: rapidly starting the hydroelectric generator set 13; the output line of the quick-start hydroelectric generating set 13 is combined with the delivery grid-connected line 9 of the hydropower station 1.

The water-light complementary combined power generation device can be provided with a hydraulic power generation unit 13 which can be quickly started in the hydropower station 1 according to the requirement under the condition that the water pumping pump unit 11 is arranged, so that the quality of a power grid can be quickly started and adjusted at some time; the water pump set 11 is arranged, so that the combined power generation device has a water pumping and energy storage function, and the energy storage can be utilized to realize the quick start of the hydroelectric generator set 13; therefore, the method is more economical and reasonable than a peak shaving unit or a regulating unit arranged in a special pumped storage power station.

On the basis of the above scheme, further, the hydropower station 1 further includes: a second transformer 10; the second transformer 10 is arranged between the hydro-generator set and the outgoing grid connection line.

When the voltage of the generated power output by the hydropower station 1 does not reach the output voltage level, a second transformer 10 may be provided in connection with the hydro-electric power generator set. And boosting the power generated by the hydroelectric generating set through the second transformer 10, and carrying out grid connection through an outgoing grid-connected line after the output level is reached.

On the basis of the scheme, further, the water surface floating equipment is fixed on the water surface through anchoring and an onshore fixed steel cable, the water surface floating equipment comprises a photovoltaic floating platform, and the photovoltaic module 3 is fixedly arranged on the photovoltaic floating platform.

On the basis of the scheme, the water surface floating device further comprises a second floating platform, and the combiner box 4, the inverter 5 and the first transformer 6 are placed on the second floating platform.

The water surface floating equipment can be fixed through anchoring and fixing steel cables on two banks, so that the water surface floating equipment is firmly fixed on the water surface. The surface floatation device may include a photovoltaic floatation platform and a second floatation platform.

The photovoltaic floating platform is used for fixedly placing the photovoltaic module 3. The size of the photovoltaic floating platform is suitable for the photovoltaic module 3. The second floating platform may be used to provide a combiner box 4, an inverter 5, or a transformer, etc. The size of the second floating platform can be set according to actual requirements.

On the basis of the above embodiment, further, a water-light complementary combined power generation device is provided with a centralized photovoltaic power station on the water surface of the water storage area 2 of the hydropower station 1. The power load of the photovoltaic power station on water is merged into the power access system of the hydropower station 1 nearby, and the power is delivered out by utilizing the output line of the hydropower station 1, so that the construction investment of the power load delivery line of the photovoltaic power station is reduced or eliminated. The power generated by the photovoltaic power station on water is converged to the shore and then is boosted to the output voltage level of the hydropower station 1 through the transformer, and then is sent out after being connected to the grid.

In addition, the huge regulation and storage function of the hydropower station 1 is utilized, and a control and regulation device is arranged to comprehensively regulate and control the photovoltaic power station and the hydroelectric generating set. When the overwater photovoltaic power station works, the hydroelectric generating set of the hydropower station 1 is turned down or partially shut down or completely shut down, so that the storage capacity of the water is increased; when the photovoltaic power station does not generate electricity, the output of a hydraulic unit of the hydropower station 1 is increased, and the storage capacity of the water storage is reduced; the regulation principle comprehensively considers the photovoltaic power generation capacity and the water storage and power generation capacity of the hydropower station 1, so that the output power of the combined power generation device is relatively balanced.

The control adjusting device is arranged, so that the photovoltaic power station and the hydropower station 1 on water form a complementary combined unit, the loads at all time intervals are relatively balanced, the impact of unbalanced power generation of the photovoltaic power station on an electric power system is avoided, and the comprehensive output of the hydropower station 1 is improved equivalently. Due to the flexible load adjustment of the hydroelectric generating set, the convenience, the large advance of modern weather forecast, the high accuracy, the full utilization of large data and the like, the total load planning and balancing of the water-light complementary power station at each time period (each time period within one day) and even for multiple days, ten days and months can be easily realized.

The photovoltaic power station and the hydropower station 1 are subjected to power system scheduling as a whole, and a water-light complementary coordinated operation control system is arranged to control AGC and AVC of the photovoltaic power station and the hydropower station 1 unit so as to realize the scheduling target. The water-light complementary coordination control system operates according to the principle of safety, reliability and economy according to the generated power required by a dispatching department or a issued load curve, and avoids the situations of light abandonment and water abandonment to the maximum extent; in addition, reactive power and voltage regulation can be carried out to ensure that the quality of the sent voltage meets the requirements of a power grid.

Referring to fig. 2, if the combined power generation device formed by the photovoltaic power station and the hydroelectric power station is required to have an over-planned load on an output line (when the installed capacity of the photovoltaic power station on water is close to or greater than the installed capacity of the hydroelectric power station 1 and full power generation is performed, the power load generated by the combined power generation device exceeds the planned load excessively), a water pump unit 11 can be arranged in the hydroelectric power station 1 to locally digest and convert part of the electric power with the excess average load into stored water, so that the combined power generation device has the water pumping and energy storage functions at the same time, and the output power load is relatively balanced.

If the area of the water area is large enough, and the scale of the overwater photovoltaic power station which can be built is large enough, the common load of the photovoltaic power station and the hydroelectric generating set exceeds the conveying capacity of an external transmission line, the water pump set 11 can be built in a matched mode, the exceeding partial load can start the water pump set 11 to digest redundant electric power on site, water is accumulated, and the hydroelectric generating capacity is increased when sunlight is insufficient or the system needs. The system is equivalent to a water-light complementary power station and has the function of a pumped storage power station.

Referring to fig. 6, a pumped storage power station unit can be added in a water-light complementary power station or an independent hydropower station 1 at a national distribution point according to needs, and a quick start hydroelectric generator unit 13 is arranged to meet the adjustment needs of an electric power system.

The cables connecting the various components of the cogeneration system can be located on the water or in the water. The cable can be arranged in water to enhance heat dissipation and prolong the service life of the cable.

The combined power generation device solves the problems of land occupation, discontinuous power generation, impact damage to the quality of a power grid caused by intermittent surfing of a large amount of generated energy and the like of a photovoltaic power station, reduces the construction investment of a large-scale photovoltaic power station, improves the operation stability, and also improves the installed output of the hydropower station 1 in a phase-changing manner.

Example 1:

a hydropower station 1 with an installed capacity of 200 KW is equipped with four 50 KW hydroelectric generating sets. The daily output power load of the hydropower station 1 is 80-200 thousands KW, and the average generating capacity for many years is designed to be 102 hundred million KW.h; after an overwater photovoltaic power station with the installed capacity of 150 kilo KW is arranged in a water area 2 of a water storage reservoir area 1 of the hydropower station to form a water-light complementary combined power generation device, the daily outgoing power load of the hydropower station 1 is increased to 100 kilo KW-200 kilo KW, and the annual power generation amount is increased to 120 hundred million KW.h.

Example 2:

three hydroelectric generating sets of 40 ten thousand KW are installed in a certain hydropower station 1 with the installed capacity of 120 ten thousand KW, the daily output power load of the hydropower station 1 is 46-120 ten thousand KW, and the average generating capacity of the hydropower station 1 in many years is 58 hundred million KW.h; after an overwater photovoltaic power generation station with the installed capacity of 150 kilo KW is arranged in a water area 2 of a water storage reservoir area 1 of the hydropower station and a water pump unit 11 is arranged in the hydropower station 1 to form a water-light complementary combined power generation device, the daily outgoing power load of the hydropower station 1 is increased to 54 kilo KW-120 kilo KW, and the annual power generation amount is increased to 75 hundred million KW.h.

Example 3:

a certain hydropower station 1 with 10-kilo KW installed is provided with two 5-kilo KW hydroelectric generating sets, the daily output power load of the hydropower station 1 is 5-10-kilo KW, the average annual generating capacity is 4.5-kilo KW.h, an overwater photovoltaic power station with 5-kilo KW installed capacity is arranged in a water area 2 of a water storage area of the hydropower station 1 to form a water-light complementary combined power generation device, so that the daily output power load of the hydropower station 1 is increased to 7-10-kilo KW, and the annual generating capacity is increased to 5.3-kilo KW.h.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A complementary cogeneration device of water and light, comprising: the system comprises a photovoltaic power station, a hydropower station and a control and regulation device; the photovoltaic power generation station comprises at least one overwater photovoltaic module, the photovoltaic module is arranged on the water surface of the water storage area of the hydropower station through water surface floating equipment, a power transmission line of the photovoltaic power generation station is combined with a delivery grid-connected line of the hydropower station, the control and regulation device is respectively connected with the photovoltaic power generation station and a hydroelectric generating set of the hydropower station, and the control and regulation device is used for comprehensively controlling the operation of the photovoltaic power generation station and the operation of the hydropower station; the photovoltaic power plant further comprises: a photovoltaic switchyard; the photovoltaic switch station is arranged on the power transmission line and used for controlling the transmission of photovoltaic power generation; the photovoltaic power plant further comprises: a combiner box, an inverter and a first transformer; the junction box and the inverter are arranged on the water surface, the first transformer is arranged on the water surface or on the shore, the photovoltaic assembly, the junction box, the inverter and the first transformer are sequentially connected through cables, and the output end of the first transformer is connected with the photovoltaic switch station.

2. The complementary cogeneration apparatus of claim 1, further comprising: a pump unit; the water pumping pump set is arranged at the downstream of the water storage area and is used for pumping water at the downstream of the water storage area to the water storage area.

3. The complementary cogeneration apparatus of claim 2, wherein said power source of said pumped hydro unit is connected to the utility power system of said hydroelectric power plant.

4. The complementary cogeneration apparatus of claim 3, further comprising: rapidly starting the hydroelectric generator set; and the output line of the quick-start hydroelectric generating set is combined with the delivery grid-connected line of the hydropower station.

5. The complementary cogeneration apparatus of claim 1, wherein said hydroelectric power plant further comprises: a second transformer; the second transformer is arranged between the hydroelectric generating set and the delivery grid-connected line.

6. The complementary cogeneration apparatus of claim 1, wherein said surface floatation device is secured to the surface of water by anchoring and shore-securing cables, said surface floatation device comprising a photovoltaic floating platform upon which said photovoltaic module is fixedly disposed.

7. The water-light complementary cogeneration apparatus of claim 6, wherein said surface floatation device further comprises a second floating platform upon which said combiner box, inverter, and first transformer are placed.