CN114123319A - OPLC-based grid-connected power generation system - Google Patents
OPLC-based grid-connected power generation system Download PDFInfo
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- CN114123319A CN114123319A CN202111366692.8A CN202111366692A CN114123319A CN 114123319 A CN114123319 A CN 114123319A CN 202111366692 A CN202111366692 A CN 202111366692A CN 114123319 A CN114123319 A CN 114123319A
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- power generation
- external power
- power grid
- grid
- control unit
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention designs an OPLC-based grid-connected power generation system, which comprises a power generation system, wherein the power generation system comprises a power generation unit, a control unit, a storage battery, an inverter and an OPLC cable; the power generation unit is used for generating power and comprises a wind turbine generator set and a hydroelectric generator set; the control assembly includes a sensor; the sensor comprises a wind power detection sensor and a water speed detection sensor; when the wind power detection sensor detects that the wind speed meets the requirement of the rated wind speed of the wind turbine generator, the control unit controls the wind turbine generator to be connected with an external power grid through an inverter, and the hydroelectric generator is used for charging a storage battery; when the water speed detection sensor detects that the water speed meets the requirement of the rated water speed of the hydroelectric generating set, the control unit controls the hydroelectric generating set to be connected with an external power grid through an inverter and uses the wind generating set to charge a storage battery; the invention provides a grid-connected power generation system, which solves the problem of discontinuity of new energy power generation.
Description
Technical Field
The invention relates to the technical field of power generation, in particular to a grid-connected power generation system based on an OPLC.
Background
The energy is an important material basis necessary for national economic development and people's life, and an energy system established on the basis of fossil fuels such as coal, petroleum, natural gas and the like greatly promotes the development of human society in the past 200 years. However, with the exhaustion of traditional fossil energy and the rapid development of national economy, how to improve the energy utilization rate and change the energy structure becomes increasingly urgent for China; under the background, distributed power generation and related technologies thereof attract more and more attention of people, new energy resources such as wind, light, water and the like have huge reserves, wide distribution, cleanness and safety, and are more applied in China, but the new energy resources are unstable in power generation and cannot provide uninterrupted reliable electric energy support for a power grid.
Disclosure of Invention
In order to solve the problems, the invention designs an OPLC-based grid-connected power generation system, which comprises a power generation system, a grid-connected power generation system and a grid-connected power generation system, wherein the power generation system comprises a power generation unit, a control unit, a storage battery, an inverter and an OPLC cable; the power generation unit is connected with the control unit, the storage battery and the inverter through an OPLC cable; after the power generation unit meets grid-connected conditions, the control unit is used for connecting the power generation unit with an external power grid through an inverter; wherein the content of the first and second substances,
the power generation unit is used for generating power and comprises a wind turbine generator set and a hydroelectric generator set;
the control unit comprises a display and a control assembly, wherein the control assembly is used for detecting the operation data of the wind turbine generator and the hydroelectric generating set and transmitting the operation data to the display for display; the control assembly includes a sensor; the sensor comprises a wind power detection sensor and a water speed detection sensor;
when the wind power detection sensor detects that the wind speed meets the requirement of the rated wind speed of the wind turbine generator, the control unit controls the wind turbine generator to be connected with an external power grid through an inverter, and the hydroelectric generator is used for charging a storage battery;
when the water speed detection sensor detects that the water speed meets the requirement of the rated water speed of the hydroelectric generating set, the control unit controls the hydroelectric generating set to be connected with an external power grid through an inverter and uses the wind generating set to charge a storage battery;
the storage battery is used for storing electric energy.
Further, the grid-connection condition includes:
the voltage frequency of the power generation unit is equal to that of the external power grid;
the error between the output voltage of the power generation unit and the voltage of an external power grid is less than 5 percent;
the phase sequence of the power generation unit is the same as that of an external power grid;
the phase of the voltage of the power generation unit is consistent with the phase of the voltage of an external power grid.
Furthermore, the power generation unit specifically comprises a support platform installed in water, the wind turbine generator is installed at the top of the support platform and above the water surface, and the hydroelectric turbine generator is installed at the bottom of the support platform and below the water surface.
Furthermore, the wind turbine generator set and the hydroelectric generator set both adopt horizontal shaft type fans.
Further, when the wind turbine generator is used as a power generation module:
if the output voltage of the wind turbine generator is reduced to be lower than 95% of the rated voltage of an external power grid, the control unit controls the wind turbine generator to be disconnected with the external power grid and detects the output voltage of the hydroelectric generator; wherein the content of the first and second substances,
if the error value between the output voltage of the hydroelectric generating set and the rated voltage of the external power grid is not more than 5%, the control unit is used for connecting the hydroelectric generating set with the external power grid through an inverter;
and if the error value between the output voltage of the hydroelectric generating set and the rated voltage of the external power grid is more than 5%, the control unit is used for connecting the storage battery with the external power grid through the inverter.
Further, when the power transmission unit is used as a power generation module:
if the output voltage of the hydroelectric generating set is reduced to be below 95% of the rated voltage of an external power grid, the control unit controls the hydroelectric generating set to be disconnected with the external power grid and detects the output voltage of the wind generating set; wherein the content of the first and second substances,
if the error value between the output voltage of the wind turbine generator and the rated voltage of the external power grid is not larger than 5%, the control unit enables the wind turbine generator to be connected with the external power grid through an inverter;
and if the error value between the output voltage of the wind turbine generator and the rated voltage of the external power grid is greater than 5%, the control unit is used for connecting the storage battery with the external power grid through the inverter.
The grid-connected power generation system based on the OPLC realizes the effect of reliably utilizing new energy to generate power by a complementary power generation mode of a wind turbine generator and a hydroelectric generator.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an OPLC-based grid-connected power generation system, which comprises a power generation system, a grid-connected power generation system and a grid-connected power generation system, wherein the power generation system comprises a power generation unit, a control unit, a storage battery, an inverter and an OPLC cable; the power generation unit is connected with the control unit, the storage battery and the inverter through an OPLC cable; after the power generation unit meets grid-connected conditions, the control unit is used for connecting the power generation unit with an external power grid through an inverter;
wherein the grid-connection condition comprises:
the voltage frequency of the power generation unit is equal to that of the external power grid;
the error between the output voltage of the power generation unit and the voltage of an external power grid is less than 5 percent;
the phase sequence of the power generation unit is the same as that of an external power grid;
the voltage phase of the power generation unit is consistent with the voltage phase of an external power grid;
the power generation unit is used for generating power and comprises a wind turbine generator set and a hydroelectric generator set;
the control unit comprises a display and a control assembly, wherein the control assembly is used for detecting the operation data of the wind turbine generator and the hydroelectric generating set and transmitting the operation data to the display for display; the control assembly includes a sensor; the sensor comprises a wind power detection sensor and a water speed detection sensor;
when the wind power detection sensor detects that the wind speed meets the requirement of the rated wind speed of the wind turbine generator, the control unit controls the wind turbine generator to be connected with an external power grid through an inverter, and the hydroelectric generator is used for charging a storage battery;
when the water speed detection sensor detects that the water speed meets the requirement of the rated water speed of the hydroelectric generating set, the control unit controls the hydroelectric generating set to be connected with an external power grid through an inverter and uses the wind generating set to charge a storage battery;
the storage battery is used for storing electric energy.
As an embodiment of the invention, the power generation unit specifically comprises a support platform 1 installed in water, the wind turbine generator is installed at the top of the support platform and located above the water surface, and the hydroelectric turbine generator is installed at the bottom of the support platform and located below the water surface.
As an embodiment of the invention, the wind turbine generator set and the hydroelectric turbine generator set both adopt horizontal shaft type fans; compared with a vertical shaft type fan, the horizontal shaft type fan has mature technology, good self-starting performance and high power generation efficiency, so that the horizontal shaft type fan is adopted, and the fan is required to be provided with a yaw control system and a pitch control system so as to be capable of automatically following the wind direction.
As an embodiment of the present invention, when the wind turbine generator is used as a power generation module:
if the output voltage of the wind turbine generator is reduced to be lower than 95% of the rated voltage of an external power grid, the control unit controls the wind turbine generator to be disconnected with the external power grid and detects the output voltage of the hydroelectric generator; wherein the content of the first and second substances,
if the error value between the output voltage of the hydroelectric generating set and the rated voltage of the external power grid is not more than 5%, the control unit is used for connecting the hydroelectric generating set with the external power grid through an inverter;
and if the error value between the output voltage of the hydroelectric generating set and the rated voltage of the external power grid is more than 5%, the control unit is used for connecting the storage battery with the external power grid through the inverter.
As an embodiment of the present invention, when the power transmission unit is used as a power generation module:
if the output voltage of the hydroelectric generating set is reduced to be below 95% of the rated voltage of an external power grid, the control unit controls the hydroelectric generating set to be disconnected with the external power grid and detects the output voltage of the wind generating set; wherein the content of the first and second substances,
if the error value between the output voltage of the wind turbine generator and the rated voltage of the external power grid is not larger than 5%, the control unit enables the wind turbine generator to be connected with the external power grid through an inverter;
and if the error value between the output voltage of the wind turbine generator and the rated voltage of the external power grid is greater than 5%, the control unit is used for connecting the storage battery with the external power grid through the inverter.
In summary, the OPLC-based grid-connected power generation system according to the present invention improves the reliability of new energy power generation by using the following methods:
when the output voltage of the wind turbine generator meets the requirement of a power grid, the wind turbine generator is adopted to supply power to the power grid, and the hydroelectric turbine generator charges a storage battery;
when the output voltage of the hydroelectric generating set meets the requirements of a power grid, the hydroelectric generating set is adopted to supply power to the power grid, and the wind generating set charges a storage battery;
when the wind turbine generator set and the hydroelectric generator set do not meet the requirements of a power grid, the storage battery is adopted to supply power for the power grid.
Finally, it is further noted that, herein, relational terms such as one and the other, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The grid-connected power generation system based on the OPLC is characterized by comprising a power generation system, wherein the power generation system comprises a power generation unit, a control unit, a storage battery, an inverter and an OPLC cable; the power generation unit is connected with the control unit, the storage battery and the inverter through an OPLC cable; after the power generation unit meets grid-connected conditions, the control unit is used for connecting the power generation unit with an external power grid through an inverter; wherein the content of the first and second substances,
the power generation unit is used for generating power and comprises a wind turbine generator set and a hydroelectric generator set;
the control unit comprises a display and a control assembly, wherein the control assembly is used for detecting the operation data of the wind turbine generator and the hydroelectric generating set and transmitting the operation data to the display for display; the control assembly includes a sensor; the sensor comprises a wind power detection sensor and a water speed detection sensor;
when the wind power detection sensor detects that the wind speed meets the requirement of the rated wind speed of the wind turbine generator, the control unit controls the wind turbine generator to be connected with an external power grid through an inverter, and the hydroelectric generator is used for charging a storage battery;
when the water speed detection sensor detects that the water speed meets the requirement of the rated water speed of the hydroelectric generating set, the control unit controls the hydroelectric generating set to be connected with an external power grid through an inverter and uses the wind generating set to charge a storage battery;
the storage battery is used for storing electric energy.
2. The power generation system of claim 1, wherein the grid-tie condition comprises:
the voltage frequency of the power generation unit is equal to that of the external power grid;
the error between the output voltage of the power generation unit and the voltage of an external power grid is less than 5 percent;
the phase sequence of the power generation unit is the same as that of an external power grid;
the phase of the voltage of the power generation unit is consistent with the phase of the voltage of an external power grid.
3. The power generation system of claim 1, wherein the power generation unit comprises a support platform installed in water, the wind turbine unit is installed on the top of the support platform and located above the water surface, and the hydroelectric turbine unit is installed on the bottom of the support platform and located below the water surface.
4. The power generation system of claim 1 or 2, wherein the wind turbine and the hydroelectric turbine both employ horizontal-axis fans.
5. The power generation system of claim 1, wherein when the wind turbine is acting as a power generation module:
if the output voltage of the wind turbine generator is reduced to be lower than 95% of the rated voltage of an external power grid, the control unit controls the wind turbine generator to be disconnected with the external power grid and detects the output voltage of the hydroelectric generator; wherein the content of the first and second substances,
if the error value between the output voltage of the hydroelectric generating set and the rated voltage of the external power grid is not more than 5%, the control unit is used for connecting the hydroelectric generating set with the external power grid through an inverter;
and if the error value between the output voltage of the hydroelectric generating set and the rated voltage of the external power grid is more than 5%, the control unit is used for connecting the storage battery with the external power grid through the inverter.
6. The power generation system of claim 1, wherein when the power transmission assembly is operating as a power generation module:
if the output voltage of the hydroelectric generating set is reduced to be below 95% of the rated voltage of an external power grid, the control unit controls the hydroelectric generating set to be disconnected with the external power grid and detects the output voltage of the wind generating set; wherein the content of the first and second substances,
if the error value between the output voltage of the wind turbine generator and the rated voltage of the external power grid is not larger than 5%, the control unit enables the wind turbine generator to be connected with the external power grid through an inverter;
and if the error value between the output voltage of the wind turbine generator and the rated voltage of the external power grid is greater than 5%, the control unit is used for connecting the storage battery with the external power grid through the inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111366692.8A CN114123319A (en) | 2021-11-18 | 2021-11-18 | OPLC-based grid-connected power generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111366692.8A CN114123319A (en) | 2021-11-18 | 2021-11-18 | OPLC-based grid-connected power generation system |
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| CN114123319A true CN114123319A (en) | 2022-03-01 |
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| CN202111366692.8A Pending CN114123319A (en) | 2021-11-18 | 2021-11-18 | OPLC-based grid-connected power generation system |
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| CN102280923A (en) * | 2011-07-13 | 2011-12-14 | 西南交通大学 | Wind/solar hybrid power supply system for traction power supply |
| CN203871872U (en) * | 2014-05-04 | 2014-10-08 | 中国海洋大学 | Ocean-energy hybrid supplementary power supply system |
| CN104092246A (en) * | 2014-07-25 | 2014-10-08 | 国电联合动力技术有限公司 | Compound grid system generating electricity through tidal current energy and electric energy distribution method thereof |
| CN208078664U (en) * | 2018-04-23 | 2018-11-09 | 中国电建集团西北勘测设计研究院有限公司 | A kind of geomantic omen storage complementary power generation system control device |
| CN110671271A (en) * | 2018-07-02 | 2020-01-10 | 赫普科技发展（北京）有限公司 | Complementary coupling power generation system and method |
-
2021
- 2021-11-18 CN CN202111366692.8A patent/CN114123319A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182635A (en) * | 2011-05-06 | 2011-09-14 | 河海大学 | Offshore renewable energy source comprehensive power generating system |
| CN102280923A (en) * | 2011-07-13 | 2011-12-14 | 西南交通大学 | Wind/solar hybrid power supply system for traction power supply |
| CN203871872U (en) * | 2014-05-04 | 2014-10-08 | 中国海洋大学 | Ocean-energy hybrid supplementary power supply system |
| CN104092246A (en) * | 2014-07-25 | 2014-10-08 | 国电联合动力技术有限公司 | Compound grid system generating electricity through tidal current energy and electric energy distribution method thereof |
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