CN112531786A - Regional power grid power delivery method - Google Patents
Regional power grid power delivery method Download PDFInfo
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- CN112531786A CN112531786A CN202011417759.1A CN202011417759A CN112531786A CN 112531786 A CN112531786 A CN 112531786A CN 202011417759 A CN202011417759 A CN 202011417759A CN 112531786 A CN112531786 A CN 112531786A
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- 238000002716 delivery method Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000010248 power generation Methods 0.000 claims abstract description 25
- 230000007774 longterm Effects 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 6
- 230000001932 seasonal effect Effects 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 3
- 206010067484 Adverse reaction Diseases 0.000 abstract description 2
- 230000006838 adverse reaction Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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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
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
-
- 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
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- 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
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a regional power grid electric power delivery method, which belongs to the technical field of electric power system planning and comprises the following steps: step S1: analyzing the time sequence characteristics of the output and the load of the distributed power sources of a wind power station, a photovoltaic power station and a hydroelectric power station in a certain area; step S2: and acquiring the theoretical output capacity of the power delivery channel of the wind power station and the photovoltaic power station in the area within a set certain historical time period. According to the invention, the current with relatively constant voltage is produced by the hydroelectric power station, hydroelectric resources are utilized to the maximum extent to be consumed in a trans-regional range, water abandon is reduced, the income of the hydroelectric power station is improved, a series of adverse reactions caused by unstable current and voltage due to the influence of various factors in the natural environment on wind power generation, hydroelectric power generation and photovoltaic power generation can be reduced, the minimization of generalized load fluctuation is realized, the stability and safety of power grid operation are improved, and the long-term operation requirement of the system in a safe and economic way is met.
Description
Technical Field
The invention belongs to the technical field of power system planning, and particularly relates to a regional power grid power delivery method.
Background
The regional power grid is a power grid which connects power plants in a wider area, is longer in power transmission line and more in user types, and is mainly a 220 kV-level power grid in China at present, and basically all provinces (regions) exist.
The new energy generally refers to renewable energy developed and utilized on the basis of new technology, including solar energy, biomass energy, wind energy, geothermal energy, wave energy, ocean current energy, tidal energy and the like, and in addition, hydrogen energy and the like, and the widely utilized energy sources such as coal, petroleum, natural gas, hydroenergy, nuclear fission energy and the like are called conventional energy sources, and the new energy power generation is a process of generating power by utilizing the existing technology and the novel energy sources.
With the gradual depletion of fossil energy sources such as coal and petroleum, the conventional thermal power generation also faces the problem of fuel shortage, so that a new renewable energy source is urgently needed to replace the conventional power generation mode, and solar energy, hydraulic energy and wind energy are one of the cleanest and most direct energy sources in the renewable energy field in the world nowadays, however, the photovoltaic power generation, the hydraulic power generation and the wind power generation are easily impressed by various factors in the environment, so that the generated current and voltage are unstable, the consumption of electric energy is increased in the external transmission process, the normal work of a power consumption end is influenced, and the uncertainty and unsafety of the operation of a power grid are increased, and therefore, an external transmission method of regional power grid power is urgently needed in the market at present stage to solve the problems.
Disclosure of Invention
The invention aims to provide a regional power grid power delivery method, which aims to solve the problems that photovoltaic power generation, hydroelectric power generation and wind power generation proposed in the background art are easily impressed by various factors in the environment, so that the produced current and voltage are unstable, the consumption of electric energy is increased in the delivery process, the normal work of a power utilization end is influenced, and the uncertainty and the unsafety of power grid operation are increased.
In order to achieve the purpose, the invention provides the following technical scheme: a method of regional power grid power delivery, the method comprising:
step S1: analyzing the time sequence characteristics of the output and the load of the distributed power sources of a wind power station, a photovoltaic power station and a hydroelectric power station in a certain area;
step S2: acquiring theoretical output capacity of a power delivery channel of a wind power station and a photovoltaic power station in the area within a set certain historical time period;
step S3: obtaining long-term prediction results of output power of the wind power station and the photovoltaic power station;
step S4: determining the output power of the wind power station and the photovoltaic power station to the hydroelectric power station through the direct current output channel;
step S5: calculating the storage capacity of a water storage system in the hydroelectric power station according to the outgoing power of the wind power station and the photovoltaic power station and a pre-established cooperative model;
step S6: dividing the power generation condition of the hydraulic resources into a rich water period and a dry water period according to the seasonal characteristics of the hydraulic resources;
step S7: judging whether the water is rich;
if so, storing the electric energy produced by the wind power station and the photovoltaic power station, and merging the stored electric energy into a commercial power supply system;
if not, the electric energy produced by the wind power station and the photovoltaic power station is utilized to introduce downstream water resources into the water storage system, and the electric energy produced by the hydroelectric power station is merged into the regional power grid electric power outward transmission channel.
Preferably, the hydropower station water conservancy parameters and the hydropower station outgoing transaction information are acquired before the storage capacity and the power generation capacity of the water storage system in the hydropower station are calculated.
Preferably, the hydropower station's hydraulic parameters include storage capacity, water level and flow, and the water and electricity outgoing transaction information includes grid loss electricity price information, transmission price information, network loss cost and transmission cost.
Preferably, the collaborative model comprises an objective function and a constraint condition which are constructed by taking generalized minimum load fluctuation as a target, and the objective function is determined according to the outgoing power of the wind power station and the photovoltaic power station.
Preferably, the timing characteristics of the distributed power supply output and the load are specifically as follows: according to historical meteorological data, wind speed curves and illumination intensity curves in different seasons and weather are obtained, time sequence characteristic curves of wind turbine and photovoltaic output are drawn by combining a wind speed-fan output function and a light intensity-photovoltaic output function, meanwhile, annual weather conditions are divided into typical scenes, DG output conditions of the scenes are simulated, and annual output of the wind turbine and the photovoltaic is obtained by combining the weight occupied by the scenes.
Compared with the prior art, the invention has the beneficial effects that: 1. in the invention, the electric energy produced by wind energy and solar energy is applied to a hydroelectric power generation system, and the hydroelectric power station produces current with relatively constant voltage, so that hydroelectric resources are utilized to the maximum extent to be absorbed in a trans-regional range, water abandonment is reduced, the income of the hydroelectric power station is improved, a series of adverse reactions caused by unstable current and voltage due to the influence of various factors in the natural environment on wind power generation, hydroelectric power generation and photovoltaic power generation can be reduced, the generalized load fluctuation minimization is realized, the stability and the safety of power grid operation are improved, and the long-term operation requirement of the system on safety and economy is met.
2. According to the invention, wind power generation and photovoltaic power generation local consumption and electric quantity delivery are combined and applied to a mains supply system, so that the consumption and utilization rate of the output of the wind power station and the photovoltaic power station can be effectively improved.
Drawings
Fig. 1 is a schematic flow chart of a method for sending out electric power of a regional power grid according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.
Referring to fig. 1, the present invention provides a technical solution: a method of regional power grid power delivery, the method comprising:
step S1: analyzing the time sequence characteristics of the output and the load of the distributed power sources of a wind power station, a photovoltaic power station and a hydroelectric power station in a certain area;
step S2: acquiring theoretical output capacity of a power delivery channel of a wind power station and a photovoltaic power station in the area within a set certain historical time period;
step S3: obtaining long-term prediction results of output power of the wind power station and the photovoltaic power station;
step S4: determining the output power of the wind power station and the photovoltaic power station to the hydroelectric power station through the direct current output channel;
step S5: calculating the storage capacity of a water storage system in the hydroelectric power station according to the outgoing power of the wind power station and the photovoltaic power station and a pre-established cooperative model;
step S6: dividing the power generation condition of the hydraulic resources into a rich water period and a dry water period according to the seasonal characteristics of the hydraulic resources;
step S7: judging whether the water is rich;
if so, storing the electric energy produced by the wind power station and the photovoltaic power station, and merging the stored electric energy into a commercial power supply system;
if not, the electric energy produced by the wind power station and the photovoltaic power station is utilized to introduce downstream water resources into the water storage system, and the electric energy produced by the hydroelectric power station is merged into the regional power grid electric power outward transmission channel.
Specifically, as shown in fig. 1, hydropower station water conservancy parameters and hydropower outgoing transaction information are acquired before the storage capacity and the power generation amount of a water storage system in a hydroelectric power station are calculated.
Specifically, as shown in fig. 1, the hydropower parameters of the hydroelectric power station include storage capacity, water level and flow rate, and the hydropower outgoing transaction information includes grid loss electricity price information, power transmission price information, network loss cost and power transmission cost.
Specifically, as shown in fig. 1, the collaborative model includes an objective function and a constraint condition that are constructed with the objective of the generalized minimum load fluctuation, and the objective function is determined according to the outgoing power of the wind power plant and the photovoltaic power plant.
Specifically, as shown in fig. 1, the timing characteristics of the distributed power supply output and the load specifically include: according to historical meteorological data, wind speed curves and illumination intensity curves in different seasons and weather are obtained, time sequence characteristic curves of wind turbine and photovoltaic output are drawn by combining a wind speed-fan output function and a light intensity-photovoltaic output function, meanwhile, annual weather conditions are divided into typical scenes, DG output conditions of the scenes are simulated, and annual output of the wind turbine and the photovoltaic is obtained by combining the weight occupied by the scenes.
The working principle is as follows: when the system is used, the time sequence characteristics of the output and the load of the distributed power supplies of the wind power station, the photovoltaic power station and the hydroelectric power station in a certain area are analyzed, the theoretical output capacity of the power delivery channels of the wind power station and the photovoltaic power station in the certain set historical time period in the certain area is obtained, the long-term prediction result of the output power of the wind power station and the photovoltaic power station is obtained, the delivery power output to the hydroelectric power station by the wind power station and the photovoltaic power station through the direct current delivery channels is determined, the storage capacity of a water storage system in the hydroelectric power station is calculated according to the delivery power of the wind power station and the photovoltaic power station and a pre-established cooperative model, the power generation condition of the hydroelectric resources is divided into a rich water period and a poor water period according to the seasonal characteristics of the hydroelectric resources, and whether the,
if the power supply system is not the regional power grid power delivery channel, the downstream water resource is introduced into the water storage system by using the power generated by the wind power station and the photovoltaic power station, and the power generated by the hydroelectric power station is incorporated into the regional power grid power delivery channel.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A method for delivering regional grid power, the method comprising:
step S1: analyzing the time sequence characteristics of the output and the load of the distributed power sources of a wind power station, a photovoltaic power station and a hydroelectric power station in a certain area;
step S2: acquiring theoretical output capacity of a power delivery channel of a wind power station and a photovoltaic power station in the area within a set certain historical time period;
step S3: obtaining long-term prediction results of output power of the wind power station and the photovoltaic power station;
step S4: determining the output power of the wind power station and the photovoltaic power station to the hydroelectric power station through the direct current output channel;
step S5: calculating the storage capacity of a water storage system in the hydroelectric power station according to the outgoing power of the wind power station and the photovoltaic power station and a pre-established cooperative model;
step S6: dividing the power generation condition of the hydraulic resources into a rich water period and a dry water period according to the seasonal characteristics of the hydraulic resources;
step S7: judging whether the water is rich;
if so, storing the electric energy produced by the wind power station and the photovoltaic power station, and merging the stored electric energy into a commercial power supply system;
if not, the electric energy produced by the wind power station and the photovoltaic power station is utilized to introduce downstream water resources into the water storage system, and the electric energy produced by the hydroelectric power station is merged into the regional power grid electric power outward transmission channel.
2. The regional power grid power delivery method of claim 1, wherein hydropower station water conservancy parameters and hydropower delivery transaction information are obtained before calculating the storage capacity and the power generation capacity of a water storage system in the hydropower station.
3. The regional power grid power delivery method of claim 1, wherein the hydropower parameters of the hydroelectric power station comprise storage capacity, water level and flow rate, and the hydropower delivery transaction information comprises grid loss electricity price information, electricity transmission price information, network loss cost and electricity transmission cost.
4. The regional power grid power delivery method of claim 1, wherein the collaborative model comprises an objective function and constraints that are constructed with the objective of generalized minimum load fluctuation, and the objective function is determined according to delivery power of the wind power plant and the photovoltaic power plant.
5. The local grid power delivery method according to claim 1, wherein the timing characteristics of the distributed power supply output and the load are specifically: according to historical meteorological data, wind speed curves and illumination intensity curves in different seasons and weather are obtained, time sequence characteristic curves of wind turbine and photovoltaic output are drawn by combining a wind speed-fan output function and a light intensity-photovoltaic output function, meanwhile, annual weather conditions are divided into typical scenes, DG output conditions of the scenes are simulated, and annual output of the wind turbine and the photovoltaic is obtained by combining the weight occupied by the scenes.
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| CN202011417759.1A CN112531786A (en) | 2020-12-07 | 2020-12-07 | Regional power grid power delivery method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114265357A (en) * | 2021-12-21 | 2022-04-01 | 国家电网有限公司 | Intelligent control system based on metering device |
| CN114462783A (en) * | 2021-12-30 | 2022-05-10 | 昆明能讯科技有限责任公司 | Method and system for calculating voltage level electric power gap in power transmission network subareas |
| CN116632930A (en) * | 2023-02-24 | 2023-08-22 | 广东永光新能源设计咨询有限公司 | Intelligent control method, system, medium and equipment for renewable energy and commercial power |
| CN117077978A (en) * | 2023-10-11 | 2023-11-17 | 浙江浙能能源服务有限公司 | Trans-regional new energy storage method and system |
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