CN104899465A - Calculation method for wind-solar ratio optimization - Google Patents
Calculation method for wind-solar ratio optimization Download PDFInfo
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Abstract
The invention discloses a calculation method for wind-solar ratio optimization. The calculation method is used for wind-solar ratio optimization in wind-solar complementary power generation construction and comprises the steps of firstly measuring annual wind speed and calculating power per hour of a wind power generation unit according to the measured wind speed, calculating the total radiation quantity of photovoltaic arrays according to the longitude and latitude and determining optimal dip angles of the photovoltaic arrays, calculating temperature per hour according to data of a meteorological station and calculating output per hour of photovoltaic power generation sets and finally calculating the optimal wind-solar volume complementary ratio. By means of the calculation method, the expected specific value of the installed capacity of the photovoltaic power station with lowest active power deviation ratio under the condition of a power value stably output by a wind power plant to the installed capacity of the wind power plant can be calculated, optimal wind-solar complementary ratio can be achieved, and it is ensured that output electricity is sufficient, is stably output and has minimum impact on a power grid.
Description
Technical field
The present invention relates to a kind of computing method of honourable proportion optimizing, especially a kind of computing method optimizing honourable installed capacity proportioning in wind light mutual complementing power generation.
Background technology
Along with the develop rapidly of renewable energy technologies, the complementary hybrid power system of wind, light obtains with its economy and reliability to be applied more and more widely.Wind-power electricity generation group comprises by wheel hub and generator, and wheel hub is rotated by Wind power propelling, drives engine power generation to produce electric energy.Photovoltaic generation group comprises photovoltaic array and electric device, and photovoltaic array is made up of the solar panel be obliquely installed.With strong complementarity due to sun power and wind energy, wind light mutual complementing engineering will compensate for wind-power electricity generation group and the defect of photovoltaic generation group autonomous system in resource in time, wind-power electricity generation and photovoltaic generating system can be general in battery pack and inversion link simultaneously, thus reduce the cost of wind light mutual complementing engineering.But due to there is discontinuity the solar electrical energy generation time, wind-power electricity generation exports unstable, reasonably the installed capacity of selective light overhead utility and wind energy turbine set installed capacity proportioning, can reduce the impact to grid-connected system, raising electric field stability.
Chinese patent literature CN103955763A discloses a kind of computing method of wind-solar hybrid power station capacity ratio, by measuring annual air speed data, solar radiation data and temperature data, proposes the selection ground of the current limiter that planning power station need install additional.But the computing method of this wind-solar hybrid power station capacity ratio need to measure annual weather data, data acquisition difficulty, operability is poor, easily occurs measuring mistake.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of computing method of honourable proportion optimizing, can calculate and expect that wind energy turbine set stablizes the minimum installed capacity of photovoltaic plant of active power deviation ratio under the performance number of output and the ratio of wind energy turbine set installed capacity.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The computing method of scene proportion optimizing, comprise following process,
A, set up measuring wind speed field, within every ten minutes, measure primary air velocity, and the air speed data that record is annual;
B, air speed data measured by A, calculate after wind speed correction and atmospheric density correction annual in the output hourly of wind-power electricity generation group;
C, according to the astronomical parameter day of year of the calculation of longitude & latitude of photovoltaic array position, day angle and declination angle;
D, the astronomical parameter obtained according to B calculate sun set/raise time and solar hour angle on photovoltaic array dip plane, calculate total radiation on photovoltaic array;
E, optimum angle of incidence by the solar panel of the built-up radiation determination photovoltaic array on photovoltaic array;
F, calculate built-up radiation hourly on photovoltaic array dip plane;
G, minimum and most high ambient temperature by every day in weather station data base querying whole year, calculate the environment temperature hourly of photovoltaic array;
H, calculate the temperature of photovoltaic array hourly according to built-up radiation hourly and environment temperature hourly;
I, on the basis of built-up radiation hourly and variation of ambient temperature, by the electric parameter of photovoltaic generation group and the connection in series-parallel parameter of photovoltaic array, calculate the output per hour of photovoltaic generation group;
G, according to photovoltaic generation group exert oneself and the output calculation of wind-power electricity generation group goes out the complementary proportioning of best honourable capacity.
Further improvement of the present invention is: the correction between the air speed error that in B, the correction of wind speed refers between the position of measuring wind and hub positions, and correction formula meets:
In above formula, Z is the firm height of wheel, the wind speed of V wheel hub, and unit is m/s; Z
0for the height of measured place, V
0for the wind speed of measured place, unit is m/s; Index α is Wind Speed Shear index, and its value depends on atmospheric stability and surface roughness, is 0.125 ~ 0.5 for meadow and open ground span.
Further improvement of the present invention is: in B, the correction of atmospheric density refers to the correction to elasticity effect of atmospheric pressure, vapour pressure and temperature, and the formula of correction is:
In above formula, P is atmospheric pressure, and e is vapour pressure, and t is air themperature, and ρ is the atmospheric density of wind-power electricity generation group wheel hub, ρ
0the atmospheric density of normal atmosphere pressure.
Further improvement of the present invention is: the built-up radiation in E comprises direct solar radiation, scattered radiation and ground return radiation.
Further improvement of the present invention is: in I, the electric parameter of photovoltaic generation group comprises optimum operating voltage, recommended current, open-circuit voltage, short-circuit current; Photovoltaic array connection in series-parallel parameter comprises the quantity in parallel of solar panel in the serial number between photovoltaic array, each photovoltaic array.
Owing to adopting technique scheme, the beneficial effect that the present invention produces is:
The computing method of the present invention's scene proportion optimizing, can calculate and expect that wind energy turbine set stablizes the minimum installed capacity of photovoltaic plant of active power deviation ratio under the performance number of output and the ratio of wind energy turbine set installed capacity, reach best wind light mutual complementing proportioning, electricity is exported enough in guarantee, stable output, minimum to the impact fluctuation of electrical network.
Measuring wind speed of the present invention was measured primary air velocity data by the whole year every ten minutes and is drawn, data are accurately meticulous.By wind speed correction and atmospheric density correction, decrease the error between measuring position and hub positions, decrease the impact on air density change of atmospheric pressure, vapour pressure and temperature, decreasing error by revising, making data measured more accurate.
Total radiation of the present invention is by the calculation of longitude & latitude of measured position out, does not need actual measurement, decreases the workload of surveying work in early stage, saved Measuring Time, increased work efficiency.
Annual environment temperature obtains from the data base querying at the gas phase station of locality, convenient and simple, do not need to take a long time to measure, saved the working time, increased work efficiency.
Accompanying drawing explanation
Fig. 1 is computing method process flow diagram of the present invention.
Embodiment
The computing method of scene proportion optimizing, is characterized in that: comprise the following steps,
A, set up measuring wind speed field, within every ten minutes, measure primary air velocity, and the air speed data that record is annual; Air speed data comprises air speed value, wind direction, air themperature, atmospheric pressure and vapour pressure;
B, air speed data measured by A, calculate after wind speed correction and atmospheric density correction annual in the output hourly of wind-power electricity generation group;
C, according to the astronomical parameter day of year of the calculation of longitude & latitude of photovoltaic array position, day angle and declination angle;
D, the astronomical parameter obtained according to B calculate sun set/raise time and solar hour angle on photovoltaic array dip plane, calculate total radiation on photovoltaic array;
E, optimum angle of incidence by the solar panel of the built-up radiation determination photovoltaic array on photovoltaic array; Optimum angle of incidence is accept the maximum inclination angle of total radiation.
F, according to the change of solar hour angle of each hour in the whole year, calculate built-up radiation hourly on photovoltaic array dip plane;
G, minimum and most high ambient temperature by every day in weather station data base querying whole year, calculate environment temperature hourly; Temperature hourly is undertaken calculating by the temperature changing regularity of the minimum temperature of every day, maximum temperature, season and every day.
H, calculate the temperature of photovoltaic array hourly according to built-up radiation hourly and environment temperature hourly;
I, on the basis of built-up radiation hourly and variation of ambient temperature, by the electric parameter of photovoltaic generation group and the connection in series-parallel parameter of photovoltaic array, calculate the output per hour of photovoltaic generation group;
G, according to photovoltaic generation group exert oneself and the output calculation of wind-power electricity generation group goes out the complementary proportioning of best honourable capacity.
Built-up radiation wherein in step e comprises direct solar radiation, scattered radiation and ground return radiation.
In I, the electric parameter of photovoltaic generation group comprises optimum operating voltage, recommended current, open-circuit voltage, short-circuit current; Photovoltaic array connection in series-parallel parameter comprises the quantity in parallel of solar panel in the serial number between photovoltaic array, each photovoltaic array.
Correction between the air speed error that in step B, the correction of wind speed refers between the position of measuring wind and hub positions, correction formula meets:
In above formula, Z is the firm height of wheel, the wind speed of V wheel hub, and unit is m/s; Z
0for the height of measured place, V
0for the wind speed of measured place, unit is m/s; Index α is Wind Speed Shear index, and its value depends on atmospheric stability and surface roughness, is 0.125 ~ 0.5 for meadow and open ground span.
In B, the correction of atmospheric density refers to the correction to elasticity effect of atmospheric pressure, vapour pressure and temperature, and the formula of correction is:
In above formula, P is atmospheric pressure, and e is vapour pressure, and t is air themperature, and ρ is the atmospheric density of wind-power electricity generation group wheel hub, ρ
0the atmospheric density of normal atmosphere pressure;
Least square method is finally adopted to calculate the generated energy of Wind turbines:
In formula: the power that P (v) exports for aerogenerator when wind speed is V, V
1for the threshold wind velocity of aerogenerator, V
2for the wind rating of aerogenerator, V
3for the cut-out wind speed of aerogenerator.The fitting parameter such as utilizing power of fan curve to obtain is a=0.028; B=-0.148; C=0.231, the goodness of fit is 0.997.
Output calculation according to wind-power electricity generation group and photovoltaic generation group goes out the complementary proportioning of best honourable capacity, and diligent deviation ratio meets formula than κ:
In formula net horsepower deviation ratio to be measure time be T cycle in the total active power of output P of scene
totalt () is relative to P
reft the departure degree κ of () is larger, total power exported is relative to P
reft () departs from larger, output-power fluctuation is larger, larger to the impact of power side electrical network.By above-mentioned calculating, can draw and expect that wind energy turbine set stablizes the minimum installed capacity of photovoltaic plant of active power deviation ratio under the performance number of output and the ratio of wind energy turbine set installed capacity.
The computing method of the present invention's scene proportion optimizing, can calculate and expect that wind energy turbine set stablizes the minimum installed capacity of photovoltaic plant of active power deviation ratio under the performance number of output and the ratio of wind energy turbine set installed capacity, reach best wind light mutual complementing proportioning, export electricity in guarantee enough, stable output fluctuation is minimum.
Claims (5)
1. the computing method of honourable proportion optimizing, is characterized in that: comprise following process,
A, set up measuring wind speed field, within every ten minutes, measure primary air velocity, and the air speed data that record is annual;
B, air speed data measured by A, calculate after wind speed correction and atmospheric density correction annual in the output hourly of wind-power electricity generation group;
C, according to the astronomical parameter day of year of the calculation of longitude & latitude of photovoltaic array position, day angle and declination angle;
D, the astronomical parameter obtained according to B calculate sun set/raise time and solar hour angle on photovoltaic array dip plane, calculate total radiation on photovoltaic array;
E, optimum angle of incidence by the solar panel of the built-up radiation determination photovoltaic array on photovoltaic array;
F, calculate built-up radiation hourly on photovoltaic array dip plane;
G, minimum and most high ambient temperature by every day in weather station data base querying whole year, calculate the environment temperature hourly of photovoltaic array;
H, calculate the temperature of photovoltaic array hourly according to built-up radiation hourly and environment temperature hourly;
I, on the basis of built-up radiation hourly and variation of ambient temperature, by the electric parameter of photovoltaic generation group and the connection in series-parallel parameter of photovoltaic array, calculate the output per hour of photovoltaic generation group;
G, according to photovoltaic generation group exert oneself and the output calculation of wind-power electricity generation group goes out the complementary proportioning of best honourable capacity.
2. the computing method of honourable proportion optimizing according to claim 1, is characterized in that: the correction between the air speed error that in B, the correction of wind speed refers between the position of measuring wind and hub positions, and correction formula meets:
In above formula, Z is the firm height of wheel, the wind speed of V wheel hub, and unit is m/s; Z
0for the height of measured place, V
0for the wind speed of measured place, unit is m/s; Index α is Wind Speed Shear index, and its value depends on atmospheric stability and surface roughness, is 0.125 ~ 0.5 for meadow and open ground span.
3. the computing method of honourable proportion optimizing according to claim 1, is characterized in that: in B, the correction of atmospheric density refers to the correction to elasticity effect of atmospheric pressure, vapour pressure and temperature, and the formula of correction is:
In above formula, P is atmospheric pressure, and e is vapour pressure, and t is air themperature, and ρ is the atmospheric density of wind-power electricity generation group wheel hub, ρ
0the atmospheric density of normal atmosphere pressure.
4. the computing method of honourable proportion optimizing according to claim 1, is characterized in that: the built-up radiation in E comprises direct solar radiation, scattered radiation and ground return radiation.
5. the computing method of honourable proportion optimizing according to claim 1, is characterized in that: in I, the electric parameter of photovoltaic generation group comprises optimum operating voltage, recommended current, open-circuit voltage, short-circuit current; Photovoltaic array connection in series-parallel parameter comprises the quantity in parallel of solar panel in the serial number between photovoltaic array, each photovoltaic array.
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| CN111476679A (en) * | 2020-04-14 | 2020-07-31 | 四川北控清洁能源工程有限公司 | Method for correcting power curve of wind turbine generator according to atmospheric stability |
| CN112000914A (en) * | 2020-08-14 | 2020-11-27 | 长江勘测规划设计研究有限责任公司 | Optimal super-distribution ratio rapid simulation calculation method for grid-connected photovoltaic project |
| CN112149058A (en) * | 2020-08-18 | 2020-12-29 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Wind-solar ratio calculation method based on power load |
| CN113285655A (en) * | 2021-05-25 | 2021-08-20 | 中国华能集团清洁能源技术研究院有限公司 | Wind-solar complementary optimal proportioning method |
| CN113570285A (en) * | 2021-09-24 | 2021-10-29 | 中国气象局公共气象服务中心(国家预警信息发布中心) | Resource utilization ratio adjusting method and device, electronic equipment and medium |
| CN116317893A (en) * | 2023-03-16 | 2023-06-23 | 绍兴淼汇能源科技有限公司 | Calculation method and adjustment system for photovoltaic panel installation angle based on topographic data |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111476679A (en) * | 2020-04-14 | 2020-07-31 | 四川北控清洁能源工程有限公司 | Method for correcting power curve of wind turbine generator according to atmospheric stability |
| CN112000914A (en) * | 2020-08-14 | 2020-11-27 | 长江勘测规划设计研究有限责任公司 | Optimal super-distribution ratio rapid simulation calculation method for grid-connected photovoltaic project |
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| CN112149058A (en) * | 2020-08-18 | 2020-12-29 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Wind-solar ratio calculation method based on power load |
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| CN113570285A (en) * | 2021-09-24 | 2021-10-29 | 中国气象局公共气象服务中心(国家预警信息发布中心) | Resource utilization ratio adjusting method and device, electronic equipment and medium |
| CN113570285B (en) * | 2021-09-24 | 2022-04-15 | 中国气象局公共气象服务中心(国家预警信息发布中心) | Resource utilization ratio adjusting method and device, electronic equipment and medium |
| CN116317893A (en) * | 2023-03-16 | 2023-06-23 | 绍兴淼汇能源科技有限公司 | Calculation method and adjustment system for photovoltaic panel installation angle based on topographic data |
| CN116317893B (en) * | 2023-03-16 | 2023-08-29 | 绍兴淼汇能源科技有限公司 | Calculation method and adjustment system for photovoltaic panel installation angle based on topographic data |
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Inventor after: Zeng Lihua Inventor after: Qin Chusheng Inventor after: Kou Fenghai Inventor after: Wang Xiaodong Inventor after: Zhang Guo Inventor before: Zeng Lihua Inventor before: Qin Chusheng Inventor before: Kou Fenghai Inventor before: Wang Xiaodong Inventor before: Zhang Guo |
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Address after: 050031 Changan District, Hebei, China, North Street, building No. 6, No. Applicant after: China Electric Power Construction Group Hebei electric survey and Design Research Institute Co., Ltd. Applicant after: Ningxia Hui Autonomous Region Electric Power Design Institute Address before: 050031 Changan District, Hebei, China, North Street, building No. 6, No. Applicant before: Hebei Province Power Surveying Design & Research Institute Applicant before: Ningxia Hui Autonomous Region Electric Power Design Institute |
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Application publication date: 20150909 |