CN103389464A - Sea operation testing method of tidal current energy device - Google Patents

Sea operation testing method of tidal current energy device Download PDF

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CN103389464A
CN103389464A CN2013103455396A CN201310345539A CN103389464A CN 103389464 A CN103389464 A CN 103389464A CN 2013103455396 A CN2013103455396 A CN 2013103455396A CN 201310345539 A CN201310345539 A CN 201310345539A CN 103389464 A CN103389464 A CN 103389464A
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current energy
energy device
tidal
marine tidal
analystal section
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CN103389464B (en
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王鑫
王海峰
张巍
郭毅
贾宁
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National Ocean Technology Center
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Abstract

The invention discloses a sea operation testing method of a tidal current energy device. According to the method, a tidal current visualizer is used for testing a tidal current speed of the position where the tidal current energy device is located; an electric power detector arranged at an electric output end of the tidal current energy device is used for testing electric power data; and acquired tidal current and electric power data are analyzed, power characteristic analysis sections are divided, tidal current and electric power data of a represent data point of each power characteristic analysis section are calculated, a device power characteristic curve is fitted, a represent point of each power characteristic analysis section is calculated, annual energy output of the tidal current energy device is calculated, and the average energy output efficiency of the tidal current energy device is calculated. The sea operation testing method is short in assessment period and low in cost, and can provide scientific evidence for research, development and improvement of a technology.

Description

The real sea situation method of testing of marine tidal-current energy device
Technical field
The present invention relates to the Ocean Surveying technology, relate generally to the method for testing of marine tidal-current energy device index parameter.
Background technology
The Ocean Tidal Current Energy development technique is relative proven technique during regenerable marine energy develops, and has obtained development faster, from energy density, energy distribution equal angles, analyzes, and has tentatively possessed the condition of industrialization, has good popularizing application prospect.Power out-put characteristic, annual electricity generating capacity and generating efficiency, be three core index of marine tidal-current energy device, has vital role in the utilization and extention of marine tidal-current energy exploitation.But in prior art, the detection of marine tidal-current energy device core index mostly is the calculating of carrying out in conjunction with the laboratory model test result, and is also not for the complete method of testing under real sea situation, particularly blank especially aspect short-term test and evaluation method.
Summary of the invention
in prior art, the detection of marine tidal-current energy device core index is not also for the complete method of testing under real sea situation, the present invention releases the real sea situation method of testing of marine tidal-current energy device, utilize the velocity observer instrument that comes flow path direction to arrange of marine tidal-current energy device, the trend situation of monitoring marine tidal-current energy device working sea area, utilize simultaneously the power output end at device to connect the electric power tester, the electric power output parameter of monitoring device, and the trend that will obtain during monitoring and electric power data screens and analysis, thereby realize marine tidal-current energy rating of set output characteristics, the test and evaluation of annual electricity generating capacity and generating efficiency.
Technical step of the present invention comprises: observation instrument is set, obtain trend and electric power outputs test data, the filler test data, divide the power characteristic analystal section, calculate each power characteristic analystal section representative point, match rating of set family curve, calculate marine tidal-current energy device annual electricity generating capacity, calculates marine tidal-current energy device average energy output efficiency.
S 1, observation instrument is set
Come flow path direction that the tidal current observation instrument is set in marine tidal-current energy device dead ahead, the instrument that lays is apart from 10 to 15 meters, marine tidal-current energy device, can guarantee to record flow velocity and represent that device lays the position flow velocity, can avoid again observation instrument to be subject to vortex that the marine tidal-current energy device causes and the impact of eddy current.For the marine tidal-current energy device of bidirectional flow generating, a tidal current observation instrument need to be set respectively before and after device,, to guarantee when the forward and reverse generating of marine tidal-current energy device, all can obtain the flow velocity of flow path direction.
S 2, obtain trend and electric power outputs test data
By tidal current observation instrument test marine tidal-current energy device placement tidal current speed, by the electric power detector test electric power data that marine tidal-current energy device power output end arranges, the trend test need be synchronizeed and carry out with the electric power test.
In spring tide range day to neap range Continuous Observation 15 days between day, for regular semi-diurnal tides or regular diurnal tide marine site Continuous Observation 7 to 8 days.
Obtained once average tidal current speed data in every 5 minutes, obtained one time simultaneously the average electrical power data in every 5 minutes, each tidal current speed data needs the electric power data that gather with the same time period corresponding one by one.Each corresponding tidal current speed data that synchronism detection obtains and electric power data form a data point.
S 3, the filler test data
Tidal current speed is during lower than the minimum design and operation flow velocity of marine tidal-current energy device or higher than the highest design and operation flow velocity, and the marine tidal-current energy device can quit work.For the marine tidal-current energy device of unidirectional generating, oppositely the incoming flow timer also can quit work.There is no electric power output during device quits work, need above-mentioned flow data is screened and weeds out before carrying out the data analysis processing.
For the detection of the marine tidal-current energy device of two-way generating,, according to the mode in S1, need to survey a flow velocity tester respectively is set in the front and back two of marine tidal-current energy device, only filter out device and carry out the data that on flow path direction, instrument obtains, calculate the mean flow rate of this time period.
S 4, divide the power characteristic analystal section
The data point of the tidal current speed data of correspondence and electric power data composition is divided into groups, grouping is carried out according to the size of flow speed value that each data point comprises, be divided into the data point of every group, all to meet its flow speed value that comprises more than or equal to a certain flow speed value, and the data point less than another flow speed value, be defined as the starting point of group as the flow speed value of lower limit, be defined as the terminal of group as the flow speed value of the upper limit.The purpose of grouping is that tested marine tidal-current energy device is carried out the power characteristic analysis, and the group of being divided is with regard to the called after analystal section.Starting point and the terminal of group, be starting point and the terminal of analystal section, and the difference of each analystal section end point values and threshold value is defined as the interval width of this analystal section.All analystal sections of dividing need join end to end, and, without overlapping, and guarantee that all data points all can and only can be divided in an analystal section of dividing between interval and interval.
While carrying out the analysis of marine tidal-current energy power characteristic, the interval width of analystal section is got 0.2 meter, ensure and be no less than 10 data points and fall into each analystal section, as the data point that falls into certain analystal section is less than 10, can enlarge the analystal section width, fall into interval interior data point with increase, but the analystal section width should be not more than 0.3 meter.
S 5, calculate each power characteristic analystal section representative data point
Analystal section, according to the size of flow speed value, makes resulting data point fall into different analystal sections after determining.The flow speed value of total data point in each analystal section and electric power value are made respectively arithmetic average, the flow velocity of each analystal section and the arithmetic mean of electric power form the representative data point of this analystal section.The flow speed value of representative data point and electric power value are and represent flow speed value and represent the electric power value.
S 6, match device characteristics of output power curve
Each analystal section representative data point that utilization calculates, utilize three least square methods to carry out numerical fitting to the representative data point, obtains the power stage power characteristic of device.
S 7, calculate the annual electricity generating capacity of marine tidal-current energy device
The flow data that utilization records calculates the annual electricity generating capacity of device, computing method are: statistics falls into the data point number of each analystal section in the shared ratio of data point sum, utilize electric power typical value in the representative data point of each analystal section, calculated the annual electricity generating capacity of device by following formula.
AEP = h AE Σ i = 1 n a i N × p i
In formula: AEP is annual electricity generating capacity
HAE is annual hourage, calculated by 8760 hours,
The analystal section number that n calculates for participation,
a iFor falling into the data point number of i analystal section,
p iBe i analystal section corresponding represent the electric power value,
N is the data point sum.
S 8, calculate marine tidal-current energy device average energy output efficiency
The average energy output efficiency of tidal current energy generating equipment is the power of output electric energy and the ratio of the marine tidal-current energy power of Blast Furnace Top Gas Recovery Turbine Unit (TRT) reception.Calculate marine tidal-current energy device average energy output efficiency for calculating the arithmetic mean that respectively represents the energy output efficiency of each power characteristic analystal section.
The average energy output efficiency of marine tidal-current energy device Calculated by following formula:
η ‾ = Σ i = 1 n η i n
η iBe i analystal section marine tidal-current energy device represent the energy output efficiency, calculated by following formula:
η i = P ai P bi
In formula:
η iBe i analystal section marine tidal-current energy device represent the energy output efficiency;
Pɑ iBe that i analystal section represents the electric power value, P ɑ iBe S 7In p i
Pb iBe i the marine tidal-current energy power that analystal section is corresponding, by i analystal section, represent the marine tidal-current energy power that the Blast Furnace Top Gas Recovery Turbine Unit (TRT) front end of flow speed value calculating acquisition is captured;
P bi=1/2ρAU i 3
A is the surface area of marine tidal-current energy device trap setting,
ρ is density of sea water, gets 1 kilograms per cubic meter,
U iThe flow speed value that represents for the i analystal section that calculate to obtain.
The present invention is based on the real sea situation observation of short-term, core technology index to the marine tidal-current energy device is estimated, evaluation cycle is short, the evaluation cost is low, and evaluation method has reliable theoretical foundation, can be the project acceptance inspection of science and technology competent authorities of government, the technical research of scientific research institution and improvement, and the investment Technology Selection of enterprise, the science reference frame is provided.
Description of drawings
Fig. 1 is the real sea situation method of testing of marine tidal-current energy device of the present invention process flow diagram.
Fig. 2 is characteristics of output power curve map under the real sea situation of the marine marine tidal-current energy device in marine site, Mount Dai.
Description of symbols in figure:
S 1, observation instrument is set
S 2, obtain trend and electric power outputs test data
S 3, test data screening
S 4, divide the power characteristic analystal section
S 5, calculate each power characteristic analystal section representative data point
S 6, match device characteristics of output power curve
S 7, calculate the annual electricity generating capacity of marine tidal-current energy device
S 8, calculate marine tidal-current energy device average energy output efficiency.
Embodiment
By reference to the accompanying drawings technical scheme of the present invention is further described.As shown in Figure 1, the real sea situation method of testing of marine tidal-current energy device of the present invention, technical step comprises: observation instrument S is set 1, obtain trend and the electric power S that outputs test data 2, test data screening S 3, divide power characteristic analystal section S 4, calculate each power characteristic analystal section representative data point S 5, match device characteristics of output power curve S 6, the annual electricity generating capacity S of calculating marine tidal-current energy device 7, calculate marine tidal-current energy device average energy output efficiency S 8.
S 1, observation instrument is set
The marine tidal-current energy power station that is laid on the marine site, Mount Dai is detected, and the tidal current energy generating equipment of two-way generating is adopted in power station.Locality is regular semi-diurnal tides, is decided to be 8 days detection time, in the both sides, front and back of device, a flow velocity tester is set respectively the marine tidal-current energy device is detected.
S 2, obtain trend and electric power outputs test data
The electric power detector of enough accuracy and range is set at the tidal current energy generating equipment power output end.The trend test is synchronizeed and is carried out with the electric power test.Obtained once average tidal current speed data in every 5 minutes, obtain simultaneously the average electrical power data one time, each tidal current speed data is corresponding one by one with the electric power data of same time period collection.Each corresponding tidal current speed data and electric power data form a data point, detect and obtain altogether 2123 data points.
S 3, test data screening
Screening weeds out the data during the too low and too high situation lower device of flow velocity quits work, marine tidal-current energy device for this two-way generating, retaining device duration of work carrys out the test data of flow path direction velocity observer instrument, through screening 1331 data points that participate in the power analysis computational analysis of common acquisition.
S 4, divide the power characteristic analystal section
The codomain that screening obtains 1331 data points is 0～2.48 meter per second, and be divided into some intervals: the flow speed data amount less than 0.6 is less, and the analystal section width is taken as 0.3 meter per second; 0.6～2.6 meter per second flow rates inner analysis interval width are got 0.2 meter per second.
Figure BDA00003643531200051
Each interval of table 1 represents flow velocity and represents the output power tables of data
S 5, calculate each power characteristic analystal section representative data point
Statistics falls into the flow speed value that the data point of each analystal section comprises, and all flow speed values in interval is made arithmetic average, with the flow speed value that calculates, as the flow speed value that represents in this interval.(as table 1)
S 6, match device characteristics of output power curve
Each analystal section representative data point that utilization is obtained, utilize three least square methods to carry out match to the representative data point, obtains the power stage power characteristic of device.(as Fig. 2)
S 7, calculate the annual electricity generating capacity of marine tidal-current energy device
Annual hourage gets 8760, according to aforementioned analystal section dividing method, calculate 1331 flow speed datas and fall into different interval frequencies, using this frequency falls into the estimation of different interval frequencies as annual flow speed data, thereby calculate the hourage that annual each flow velocity occurs, and then calculate the power station annual electricity generating capacity, the annual electricity generating capacity computing formula is as follows:
AEP = h AE Σ i = 1 n a i N × p i
Wherein, AEP is annual electricity generating capacity;
h AE, for the year generating dutation, be taken as 8760 hours;
It is 11 that the analystal section that participates in calculating is counted n;
N obtains the data point sum for detecting, and is 1331;
a iFall into i interval number for detecting acquisition flow speed value that data recording point comprises;
p iBe i analystal section corresponding represent output power value
The final annual electricity generating capacity of calculating is about 20,000 degree.
S 8, calculate marine tidal-current energy device average energy output efficiency
The surface area of marine tidal-current energy device trap setting is 4.91 square metres, according to each the interval energy that calculates, exports flow velocity and represents output power (as table 1), and the average energy output efficiency that calculates device is about 34.45%.

Claims (7)

1. the real sea situation method of testing of a marine tidal-current energy device, it is characterized in that, technical step comprises: observation instrument is set, obtain trend and electric power outputs test data, the filler test data, divide the power characteristic analystal section, calculate each power characteristic analystal section representative point, match rating of set family curve, calculate marine tidal-current energy device annual electricity generating capacity, calculates marine tidal-current energy device average energy output efficiency.
2. the real sea situation method of testing of marine tidal-current energy device according to claim 1, is characterized in that, the described observation instrument that arranges is to come flow path direction that the tidal current observation instrument is set in marine tidal-current energy device dead ahead, and the instrument that lays is apart from 10 to 15 meters, marine tidal-current energy device; For the marine tidal-current energy device of bidirectional flow generating, a tidal current observation instrument need to be set respectively before and after device,, to guarantee when the forward and reverse generating of marine tidal-current energy device, all can obtain the flow velocity of flow path direction.
3. the real sea situation method of testing of marine tidal-current energy device according to claim 1, it is characterized in that, describedly obtain trend and electric power outputs test data, by tidal current observation instrument test marine tidal-current energy device placement tidal current speed, test the electric power data by the electric power detector that marine tidal-current energy device power output end arranges, the trend test is synchronizeed and is carried out with the electric power test, obtained once average tidal current speed data and average electrical power data in every 5 minutes, each corresponding tidal current speed data that synchronism detection obtains and electric power data form a data point.
4. the real sea situation method of testing of marine tidal-current energy device according to claim 1, it is characterized in that, described division power characteristic analystal section, divide the power characteristic analystal section according to the corresponding tidal current speed data that synchronism detection obtains with the size of the flow speed value that data point comprises of electric power data composition, analystal section joins end to end,, without overlapping, and guarantee that all data points all can and only can be divided in an analystal section of dividing between interval and interval; Each analystal section end point values and threshold value are interval width, and the width of analystal section is got 0.2 meter, have in each analystal section to be no less than 10 data points and to fall into.
5. the real sea situation method of testing of marine tidal-current energy device according to claim 1, it is characterized in that, each power characteristic analystal section representative data point of described calculating, that the flow speed value of data point in each interval and electric power value are calculated respectively its arithmetic mean, be and represent flow speed value and represent that electric power value, the flow speed value of representative data point and electric power value are and represent flow speed value and represent the electric power value by the mean flow velocity value of each analystal section that calculates and average electrical power value.
6. the real sea situation method of testing of marine tidal-current energy device according to claim 1, is characterized in that, the annual electricity generating capacity of described calculating marine tidal-current energy device, calculated by following formula,
AEP = h AE Σ i = 1 n a i N × p i
In formula: AEP is annual electricity generating capacity
HAE is annual hourage, calculated by 8760 hours,
The analystal section number that n calculates for participation,
a iFor falling into the data point number of i analystal section,
p iBe i analystal section corresponding represent the electric power value,
N is the data point sum.
7. the real sea situation method of testing of marine tidal-current energy device according to claim 1, is characterized in that, described calculating marine tidal-current energy device average energy output efficiency is the arithmetic mean that respectively represents the energy output efficiency of each power characteristic analystal section of calculating,
The average energy output efficiency of marine tidal-current energy device
Figure FDA00003643531100021
Calculated by following formula:
η ‾ = Σ i = 1 n η i n
η iBe i analystal section marine tidal-current energy device represent the energy output efficiency, calculated by following formula:
η i = P ai P bi
In formula:
η iBe i analystal section marine tidal-current energy device represent the energy output efficiency,
Pɑ iBe that i analystal section represents the electric power value;
Pb iBe i the marine tidal-current energy power that analystal section is corresponding, by i analystal section, represent the marine tidal-current energy power that the Blast Furnace Top Gas Recovery Turbine Unit (TRT) front end of flow speed value calculating acquisition is captured;
P bi=1/2ρAU i 3
A is the surface area of marine tidal-current energy device trap setting,
ρ is density of sea water, is taken as 1 kilogram/every cubic metre,
U iThe flow speed value that represents for the i analystal section that calculate to obtain.
CN201310345539.6A 2013-08-09 2013-08-09 Tidal current energy device sea situation method of testing Expired - Fee Related CN103389464B (en)

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CN113553717A (en) * 2021-07-27 2021-10-26 国家海洋技术中心 Annual energy production estimation method for tidal current energy power generation device

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CN113553717A (en) * 2021-07-27 2021-10-26 国家海洋技术中心 Annual energy production estimation method for tidal current energy power generation device

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