CN104348159A - Electric power control method based on non-grid-connected multi-energy collaborative power supply - Google Patents
Electric power control method based on non-grid-connected multi-energy collaborative power supply Download PDFInfo
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- CN104348159A CN104348159A CN201310312707.1A CN201310312707A CN104348159A CN 104348159 A CN104348159 A CN 104348159A CN 201310312707 A CN201310312707 A CN 201310312707A CN 104348159 A CN104348159 A CN 104348159A
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
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Abstract
The invention relates to an electric power control method based on non-grid-connected multi-energy collaborative power supply. In the method, a renewable energy generating apparatus supplies power to an intelligent load in a non-grid-connected form; the intelligent load is a high-energy-consuming load which maintains unchanged current efficiency within a quite wide scope and by which, great fluctuations of input currents only affects product output rather than product quality. When a public power network is at a peak period, power is supplied to the intelligent load according to a preset minimum electric quantity; and when the public power network is at a valley period, the public power network cancels the restriction of supplying power to the intelligent load according to the preset minimum electric quantity. The method provided by the invention can be adaptive to impact exerted by fluctuations of the renewable energy generating apparatus on the power network, can improve the economic benefits of an enterprise having the intelligent load by making full use of a peak-valley electricity difference of the power network, and assists the power network in depth peak adjustment.
Description
Technical field
The present invention relates to a kind of electrical control method of working in coordination with power supply based on non-grid-connected multiple-energy-source, belong to power control technology field.
Background technology
Since reform and opening-up, Chinese national economy grows continuously and fast, and economic total volume constantly reaches a new high.Along with rapid development of economy, the electricity needs of China also increases rapidly.Within 2012, China's Analyzing Total Electricity Consumption reaches 49,591 hundred million kilowatt hours, increases by 5.5% on a year-on-year basis.From 1980 to 2012, China's Analyzing Total Electricity Consumption increased by 16.8 times, increases by 9.2% every year.
Under the situation that energy-saving and emission-reduction are increasingly serious, various countries are subject to the exploitation of various regenerative resource and pay attention to.China is the giant of international clear energy sources at present, is the cradle of solar energy maximum in the world, wind-force and environmental science and technology company.Similar regenerative resource also comprises biological energy source, water energy, geothermal energy, Hydrogen Energy etc.
Only be described for wind energy below, other forms of regenerative resource and wind energy similar.Wind energy is clean as one, free of contamination regenerative resource, and its development and utilization is considered to the important component part of world energy sources strategy.The application mode of large-scale wind power field is mainly based on wind-electricity integration in the world at present, and the utilization of wind energy is mainly carried out according to the route of " wind wheel-generator-electrical network-user (load) ", and wherein electrical network is the load of wind-powered electricity generation and the power supply of user.But due to unsteadiness and the wave characteristic of wind-powered electricity generation, large-scale wind power online also also exists the technology barrier that present stage is difficult to overcome, and wind-powered electricity generation is difficult to become a global problem more than 10% to electrical network contribution rate.Meanwhile, wind-powered electricity generation online proposes the requirement meeting electrical network frequency stabilization, voltage stabilizing and steady phase to wind energy conversion system, increased considerably wind energy conversion system manufacturing cost and wind-powered electricity generation price thus, the large-scale application of wind-powered electricity generation is restricted.
China has abundant wind energy resources, and the wind energy content that China can develop is considerably beyond fossil energy (coal, oil, natural gas) sum, and the high wind energy in existing 50 meters, fixed land can utilize reserves to be 23.8 hundred million kilowatts.In the end of the year 2011, newly-increased installed capacity of wind-driven power 1,763 ten thousand kilowatts, accounts for 40% of global total increment, and wind-powered electricity generation installation total amount has reached 6,270 ten thousand kilowatts, keeps world-leading status.Wind power generation has randomness, indirect, and large-scale wind power access causes electrical network equivalent load peak-valley difference to become large, brings impact to the stability of electrical network.Along with the fast development of Wind Power Generation Industry, above feature makes the digestibility and utilization of wind-powered electricity generation become a difficult problem.The problem of wind-electricity integration becomes and day by day highlights.Just current, China has quite-and the wind-powered electricity generation of part do not realize generating electricity by way of merging two or more grid systems.
The grid-connected Main Bottleneck having become restriction wind-powered electricity generation extensive development, is mainly reflected in the following aspects:
(1) be difficult under the randomness of wind energy and intermittence cause existence conditions effectively to utilize on a large scale.
(2) area that wind energy resources is abundant and Construction of Wind Power, be mainly distributed in the outlying district away from load center, grid structure is relatively weak, and the access of large-scale wind power causes electrical network unstable.
(3) wind-electricity integration must meet the 10 multiple technologies parameter requests such as electrical network frequency stabilization, voltage stabilizing, steady phase place to blower fan, blower fan structure and control system is had to complicated, thereby increases blower fan manufacturing cost, wind-powered electricity generation price and probability of malfunction.
(4) due to the randomness of wind-powered electricity generation, grid requirements stability and safety is run, and therefore, wind energy turbine set access will meet corresponding technical specification.Meanwhile, in order to accomplish electrical network rational management, ensureing power supply quality, requiring the short-period forecast of wind energy turbine set energy output to be provided and to consider to build-fixed supplementary measures.As electrical network must have a large amount of corresponding spinning reserve power supplys etc., thus gross investment is caused to increase.
(5) access of Large Copacity wind-powered electricity generation can affect scheduling and operational mode, FREQUENCY CONTROL, Voltage Cortrol, the quality of power supply of electrical network, and the fault level of electrical network and stability etc.The interval intrinsic due to wind power generation and fluctuation, the reliability of electrical network may reduce, and the operating cost of electrical network increases.In order to overcome the problems such as the quality of power supply that wind-powered electricity generation brings to electrical network and reliability, grid company also can be made to increase necessary research expenditure and equipment investment.
When not having the peak regulation such as water power or fuel gas generation, current wind-powered electricity generation is difficult to more than 10% to electrical network contribution rate, after proportion is more than 10%, will produces and obviously impact, and can cause extensive serious accident time serious to partial electric grid.In November, 2012, there are 28 improper off-grids of wind-powered electricity generation in China national grid company altogether.This also impels researchers to study the inherent coupling mechanism of wind-powered electricity generation and electrical network and moving law, to improving the utilance of wind-powered electricity generation.
In order to make full use of wind-powered electricity generation, and degree of depth peak regulation being carried out to electrical network, proposing the concept of " intelligent power generation " abroad.So-called " intelligent power generation " refers to the change of power plant according to end loads, automatic power generation adjustment amount, and main practicable ways is the change being met load by the peak regulation of the generating such as combustion gas, water power.Water resources and the combustion gas resource of American-European countries are abundanter, and generating set is based on water power and combustion gas, and peak regulation ratio is easier to, and this is conducive to the scale application of wind-powered electricity generation.US natural gas generating in 2007 accounts for 39.5%, and oil-fired power generating accounts for 5.6%, and U.S.'s quick adjustment power supply accounts for 50%.German combustion gas, fuel oil and pumped storage in 2008 account for 25% of total installation of generating capacity, and other regulated power supply accounts for 8%, and German fast tunable power supply accounts for 25%.
For Spain, this state has very abundant wind energy resources, and according to wind energy association of Spain (AEE) recent statistics, by the end of the year 2009, this state's installed capacity of wind-driven power will reach 1,826 ten thousand kilowatts, accounts for 18.5% of total installation of generating capacity.Integrated wind plant is more than 500.2001 ~ 2009 years, installed capacity of wind-driven power increased by 23.4% every year, and the proportion accounting for installation total amount improves 12.4 percentage points.
2009, Spain's wind power generation amount was 35,800,000,000 kilowatt hours, accounts for 12.5% of national gross generation, and comparatively calendar year 2001 improves 9.6 percentage points.2001 ~ 2009 years, wind power generation amount increased by 23.2% every year.During 8 days 3 December in 2009 59 points, instantaneous wind power output reaches 53.7% of national electric load; The same day, wind power generation amount was up to 2.52 hundred million kilowatt hours, accounted for 44.9% of whole nation power consumption on the same day; Of that month wind-powered electricity generation ratio, also up to 22.7%, exceedes nuclear power (19.5%) first.
It is so high that Hispanic wind power generation accounts for total generating total amount, and very important reason is that electric power system possesses better peak modulation capacity.In order to adapt to wind-powered electricity generation installation scale and the needs that improve constantly of energy output, Spain greatly develops Gas Generator Set, the gas and oil mixed fuel unit with degree of depth peak modulation capacity in recent years, actively promotes pump-storage generator construction.By the end of the year 2009, the installation possessing good peaking performance will reach 3,497 ten thousand kilowatts, account for 35.5% of total installation of generating capacity, effectively improve the peak modulation capacity of electric power system.
But the energy of China is based on coal resources, its main feature is " rich coal, few oil, deficency ", and the energy source of the overwhelming majority is in thermal power generation." three Norths " regional power structure that China's Wind Power Development is comparatively concentrated is all based on thermoelectricity, and regulating power is not strong.North China, northeast thermoelectricity ratio account for more than 80%, and thermal power plant unit is more.By the end of the year 2011, national thermal power generation installed capacity will amount to 76,546 ten thousand kilowatts, account for 72.5% of total installation of generating capacity, and annual newly-increased thermoelectricity installed capacity 5,886 ten thousand kilowatts, thermoelectricity energy output 38,975 hundred million kilowatt hour, accounts for 82.56% of national gross generation.The coal resources natural endowment of China's abundant determines China and will keep in long period section based on the power supply architecture of coal electricity.
Relative to the unit such as water power and combustion gas, thermal power unit boiler combustion system has large time delay, large delay characteristic, should not carry out degree of depth peak regulation.And along with the decline of unit output, its coal consumption is also corresponding to be increased considerably.If fired power generating unit participates in peak regulation, by the situation that there will be coal consumption rising and generating set decrease in efficiency, economy and seriously glide.Table 1 shows certain supercritical thermal power unit under different conditions of exerting oneself, the rising value of often decline 100MW coal consumption of exerting oneself.When supercritical thermal power unit participates in peak regulation output drop 50%, spending electric coal consumption increases by 44 grams, and rise 13.6%, unit enters lossing state.
Table 1 supercritical thermal power unit is exerted oneself the rising value of often decline 100MW coal consumption
| Unit output scope (unit MW) | Coal consumption rising value (unit g/kwh) |
| 1000-800 | 6 |
| 800-600 | 14 |
| 600-500 | 24 |
| 500-300 | 44 |
Because coal electricity is that main power supply architecture can not degree of depth peak regulation, therefore to there is power distribution unreasonable for China's large regional grid, causes power supply architecture (base, waist, peak load power supply) property contradiction, i.e. electrical network famine peaking power source.China forces overcritical and overcritical 600,000-100 ten thousand kilowatts of unconventional peak regulations of unit always for many years, is pressed onto 50% subcritical operation during low ebb, and low-carbon (LC) unit high-carbon is run.Along with urbanization, industrialization, the power load that electrical network increases every year, its peak-valley difference will more than 50%.
Current domestic conventional peak regulation method is still based on hydroenergy storage station, unnecessary electric energy when hydroenergy storage station is low by network load, change the high value electric energy of electrical network peak time into, also be suitable for frequency modulation, phase modulation, the cycle of stable power system and voltage, and be preferably emergency duty, also can the efficiency of thermal power station and nuclear power station in raising system.But, hydroenergy storage station can lose the energy of about 25%, and hydroenergy storage station also has its particularity in hydraulic structure, such as just strict especially to the requirement of antiseepage, bring because its water is electricity consumption, unit suction height mostly is negative value simultaneously, and factory building mostly is underground type etc., therefore in design and construction, has certain difficulty.Hydroenergy storage station requires to possess 2, upstream and downstream reservoir simultaneously, floor space is large, and cost is higher, and is subject to the restriction of hydroenergy storage station addressing, comparatively large on the impact of the biological environment such as water and soil, vegetation, present various countries are all very careful for the construction of large hydropower station.Electrical storage device is the common form of energy storage, also can be used for peak regulation, but the use of extensive electrical storage device is not only invested greatly, and the energy of 25-30% can be caused to be depleted.
Summary of the invention
The technical problem that the present invention solves is: propose a kind of electrical control method of working in coordination with power supply based on non-grid-connected multiple-energy-source, the method can adapt to the impact of fluctuation to electrical network of renewable energy power generation device, and the electricity price between peak and valley that can make full use of electrical network improves the economic benefit bearing intelligent load enterprise, auxiliary electrical network carries out degree of depth peak regulation.
In order to solve the problems of the technologies described above, the present invention propose technical scheme be: a kind of electrical control method of working in coordination with power supply based on non-grid-connected multiple-energy-source, renewable energy power generation device with non-grid-connected form for intelligent load is powered; Described intelligent load is that input current fluctuates widely and only affects product yield and do not affect product quality and the highly energy-consuming load keeping current efficiency constant in wider scope; When utility network is in the peak period, power to described intelligent load according to the minimum amount of power preset; When utility network is in the paddy period, utility network cancels the restriction of powering according to the minimum amount of power preset to intelligent load electricity.
The electricity price between peak and valley that can make full use of public power Webweb electricity like this improves the economic benefit bearing intelligent load enterprise, and auxiliary utility network carries out degree of depth peak regulation.
The improvement of technique scheme is: described intelligent load is electrolytic aluminium device, sea water desalinating unit, scale device for producing hydrogen, salt chemical engineering device, ferroalloy smelting device and/or oil rig.
The further improvement of technique scheme is: described renewable energy power generation device is wind power generation plant, device of solar generating and/or tidal power generating device.
The further improvement of technique scheme is: described renewable energy power generation device adopts coupling control technology to be that intelligent load is powered.
The beneficial effect that the present invention brings is:
1) the present invention breaches the framework of traditional intelligence electrical network, for the national conditions of China's " rich coal, few oil, deficency ", propose the concept of intelligent load, intelligent load is keep substantially constant load according to size intelligent work its production efficiency under corresponding load of amount of power supply, and that is this intelligent load can adapt to the fluctuation of supply load.The proposition of intelligent load is that the utilance improving the unstable power supplys such as wind-powered electricity generation provides theory support, when namely supplying the electric current reduction of intelligent load, the current efficiency of intelligent load is substantially constant, so just can maintain intelligent load low electricity running daytime, evening is running at full capacity then, thus until the effect of hydroenergy storage station.But compared with hydroenergy storage station; efficiency of the present invention is higher; avoid the loss of power conversion brings 30%; and evening utility network net electricity price lattice lower (electricity price on daytime as jiangsu coast scale electricity consumption enterprise is 1.05 yuan/degree; then be down to 0.27 yuan/degree night), also for the enterprise of intelligent load reduces production cost.
2) road of the present invention's to be China based on the electricity generation system of coal electricity propose brand-new using energy source, combined with intelligent generating, proposes the theory of smart electric grid system.Smart electric grid system covers the mains side of electric power system, transmission of electricity distribution side and the main aspect of electricity consumption side, constructs a comparatively complete electric power system block diagram.Be coupled on the basis of inherent law at research wind-powered electricity generation with thermoelectricity electrical network, by the research of non-grid-connected renewable energy generating, breach the coupled relation of existing supply side passive adaptation load-side, propose the electrical control method of working in coordination with electric power system based on multiple-energy-source.Under the big frame of intelligent grid, by multiple-energy-source power to intelligent common electrical network directly and indirect regulation, can realize that regenerative resource 100% is efficient, low cost utilizes, accomplish long-term, stable, reliability service.
It is 3) of the present invention that to work in coordination with the electrical control method commercial promise of power supply based on non-grid-connected multiple-energy-source good.Electrical control method of working in coordination with power supply based on non-grid-connected multiple-energy-source of the present invention makes the industry at intelligent load place by the sustainable new industry of high energy-consuming industry virescence, electrical network friendly, has good economy, society and environmental benefit.
Embodiment
Embodiment
The electrical control method of working in coordination with power supply based on non-grid-connected multiple-energy-source of the present embodiment, renewable energy power generation device is with non-grid-connected form for intelligent load is powered, and wherein intelligent load is that input current fluctuates widely and only affects product yield and do not affect product quality and the highly energy-consuming load keeping current efficiency constant in wider scope.In the present embodiment, intelligent load can be the combination in any of electrolytic aluminium device, sea water desalinating unit, scale device for producing hydrogen, salt chemical engineering device, ferroalloy smelting device and oil rig.
In the present embodiment, renewable energy power generation device is the combination in any of wind power generation plant, device of solar generating and tidal power generating device, adopts coupling control technology to be that intelligent load is powered.Coupling control technology is prior art, and coupling control technology is applied in the present embodiment, effectively can solve renewable energy power generation device and combine for intelligent load is powered with non-grid-connected form.
In the present embodiment when utility network is in the peak period, utility network supplies the minimum amount of power that described intelligent load is preset, and when utility network is in the paddy period, utility network cancels the restriction to the supply of intelligent load electricity.Like this when utility network is in the paddy period, intelligent load can be operated at full capacity, and the electricity price between peak and valley making full use of public power Webweb electricity improves the economic benefit bearing intelligent load enterprise, and auxiliary utility network carries out degree of depth peak regulation.
The present invention is not limited to the concrete technical scheme described in above-described embodiment, and all employings are equal to replaces the protection range that the technical scheme formed is application claims.
Claims (4)
1. work in coordination with an electrical control method for power supply based on non-grid-connected multiple-energy-source, it is characterized in that: renewable energy power generation device with non-grid-connected form for intelligent load is powered;
Described intelligent load is that input current fluctuates widely and only affects product yield and do not affect product quality and the highly energy-consuming load keeping current efficiency constant in wider scope;
When utility network is in the peak period, power to described intelligent load according to the minimum amount of power preset;
When utility network is in the paddy period, utility network cancels the restriction of powering according to the minimum amount of power preset to intelligent load electricity.
2. electrical control method of working in coordination with power supply based on non-grid-connected multiple-energy-source according to claim 1, is characterized in that: described intelligent load is electrolytic aluminium device, sea water desalinating unit, scale device for producing hydrogen, salt chemical engineering device, ferroalloy smelting device and/or oil rig.
3. electrical control method of working in coordination with power supply based on non-grid-connected multiple-energy-source according to claim 1, is characterized in that: described renewable energy power generation device is wind power generation plant, device of solar generating and/or tidal power generating device.
4. electrical control method of working in coordination with power supply based on non-grid-connected multiple-energy-source according to claim 1, is characterized in that: described renewable energy power generation device adopts coupling control technology to be that intelligent load is powered.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162544A (en) * | 2020-01-06 | 2020-05-15 | 长沙而道新能源科技有限公司 | New energy power generation control system |
| CN111668834A (en) * | 2020-06-05 | 2020-09-15 | 中国能源建设集团江苏省电力设计院有限公司 | Thermal power plant hydrogen production system capacity optimal configuration method based on auxiliary peak regulation service |
| CN117748595A (en) * | 2024-02-19 | 2024-03-22 | 宁波市电力设计院有限公司 | Offshore integrated power supply system based on clean energy |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162544A (en) * | 2020-01-06 | 2020-05-15 | 长沙而道新能源科技有限公司 | New energy power generation control system |
| CN111162544B (en) * | 2020-01-06 | 2021-08-10 | 河北点击新能源科技有限公司 | New energy power generation control system |
| CN111668834A (en) * | 2020-06-05 | 2020-09-15 | 中国能源建设集团江苏省电力设计院有限公司 | Thermal power plant hydrogen production system capacity optimal configuration method based on auxiliary peak regulation service |
| CN117748595A (en) * | 2024-02-19 | 2024-03-22 | 宁波市电力设计院有限公司 | Offshore integrated power supply system based on clean energy |
| CN117748595B (en) * | 2024-02-19 | 2024-05-03 | 宁波市电力设计院有限公司 | Offshore integrated power supply system based on clean energy |
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