CN103389464B - Tidal current energy device sea situation method of testing - Google Patents

Abstract

The invention discloses a kind of tidal current energy device sea situation method of testing, marine tidal-current energy device placement tidal current speed is tested by tidal current observation instrument, electric power data tested by the electrical power monitoring instrument arranged by marine tidal-current energy device power output end, to the trend obtained and electric power data analysis, divide power characteristic analystal section, calculate trend and the electric power data of each power characteristic analystal section representative data point, matching rating of set family curve, calculate each power characteristic analystal section representative point, calculate marine tidal-current energy device annual electricity generating capacity, calculate marine tidal-current energy device average energy output efficiency.Assessment cycle of the present invention is short, cost is low, can be technical research and improvement provides scientific basis.

Description

Tidal current energy device sea situation method of testing

Technical field

The present invention relates to Ocean Surveying technology, relate generally to the method for testing of marine tidal-current energy device index parameter.

Background technology

Ocean Tidal Current Energy development technique is the technology of relative maturity during regenerable marine energy develops, and obtains and develops faster, angularly analyze from energy density, energy distribution, tentatively possessed the condition of industrialization, had good popularizing application prospect.Power out-put characteristic, annual electricity generating capacity and generating efficiency are three core index of marine tidal-current energy device, in the utilization and extention of marine tidal-current energy exploitation, have vital role.But in prior art, the detection of marine tidal-current energy device core index mostly is the calculating that Binding experiment room model test results carries out, also not for the complete method of testing under real sea situation, particularly blank especially in short-term test and evaluation method.

Summary of the invention

For 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 tidal current energy device sea situation method of testing, utilize the velocity observer instrument carrying out flow path direction setting of marine tidal-current energy device, the trend situation of monitoring marine tidal-current energy device working sea area, utilize simultaneously and connect electric power tester at the power output end of device, the electric power output parameter of monitoring device, and the trend obtained during monitoring and electric power data are carried out screening and analyzes, thus 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: arrange observation instrument, acquisition trend and electric power output test data, filler test data, divide power characteristic analystal section, calculate each power characteristic analystal section representative data point, matching rating of set family curve, calculates marine tidal-current energy device annual electricity generating capacity, calculates marine tidal-current energy device average energy output efficiency.

S1, observation instrument is set

Carry out flow path direction in marine tidal-current energy device dead ahead and tidal current observation instrument is set, the instrument laid is apart from 10 to 15 meters, marine tidal-current energy device, can ensure that recording flow velocity represents device placement flow velocity, the impact of observation instrument can be avoided again to be subject to vortex that marine tidal-current energy device causes and eddy current.For the marine tidal-current energy device of bidirectional flow generating, then need before and after device, respectively arrange a tidal current observation instrument, to ensure, when the forward and reverse generating of marine tidal-current energy device, all can obtain the flow velocity of flow path direction.

S2, acquisition trend and electric power output test data

Test marine tidal-current energy device placement tidal current speed by tidal current observation instrument, electric power data tested by the electrical power monitoring instrument arranged by marine tidal-current energy device power output end, and trend test and electric power are tested and need synchronously be carried out.

Continuous Observation 15 days between spring tide range day to neap range day, in regular semi-diurnal tides or regular diurnal tide marine site Continuous Observation 7 to 8 days.

Within every 5 minutes, obtain once average tidal current speed data, within every 5 minutes simultaneously, obtain average electrical power data, the electric power data one_to_one corresponding that each tidal current speed data need gather with the same time period.Each corresponding tidal current speed data that synchronism detection obtains and electric power data form a data point.

S3, filler test data

When tidal current speed is 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, marine tidal-current energy device can quit work.For the marine tidal-current energy device of unidirectional generating, reverse incoming flow timer also can quit work.Do not have electric power to export during device quits work, need above-mentioned flow data is screened and weeds out before carrying out Data Analysis Services.

For the detection of the marine tidal-current energy device of two-way generating, according to the mode in S1, need to survey in the front and back two of marine tidal-current energy device each a flow velocity tester is set, then 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.

S4, division power characteristic analystal section

The data point that the tidal current speed data of correspondence and electric power data form is divided into groups, divide into groups according to each data point comprise flow speed value size carry out, be divided into the data point often organized, all meet its flow speed value comprised to be more than or equal to a certain flow speed value, and be less than the data point of another flow speed value, flow speed value as lower limit is defined as the starting point of group, and the flow speed value as the upper limit is defined as the terminal of group.The object of grouping carries out power characteristic analysis to tested marine tidal-current energy device, the group of dividing with regard to called after analystal section.The starting point then organized and terminal, be starting point and the terminal of analystal section, and the difference definition of each analystal section end point values and threshold value is the interval width of this analystal section.The all analystal sections divided need join end to end, interval with between interval without overlapping, and ensure all data points all can and only can be divided in an analystal section divided.

When carrying out the analysis of marine tidal-current energy power characteristic, the interval width of analystal section gets 0.2 meter, ensure and be no less than 10 data points and fall into each analystal section, data point as fallen into certain analystal section is less than 10, then can expand analystal section width, to increase the data point fallen in interval, but analystal section width should be not more than 0.3 meter.

S5, calculate each power characteristic analystal section representative data point

After analystal section is determined, according to the size of flow speed value, obtained data point is made to fall into different analystal sections.The flow speed value of total data point in each analystal section and electric power value are made arithmetic mean respectively, and 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 electric power value.

S6, matching device characteristics of output power curve

Utilize each analystal section representative data point calculated, utilize three least square methods to carry out numerical fitting to representative data point, the power stage power characteristic of obtaining means.

The annual electricity generating capacity of S7, calculating marine tidal-current energy device

The annual electricity generating capacity of flow data to device recorded is utilized to calculate, computing method are: statistics falls into the ratio of data point number shared by data point sum of each analystal section, utilize electric power typical value in the representative data point of each analystal section, the annual electricity generating capacity of device is gone out by following formulae discovery

$\mathrm{AEP}=h_{\mathrm{AE}}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\frac{a_i}{N}\×p_i$

In formula: AEP is annual electricity generating capacity

H _aEfor annual hourage, calculated by 8760 hours,

N is the analystal section number participating in calculating,

A _ifor falling into the data point number of i-th analystal section,

P _ibe the representative electric power value that i-th analystal section is corresponding,

N is data point sum.

S8, calculating marine tidal-current energy device average energy output efficiency

The average energy output efficiency of tidal current energy generating equipment is the ratio of the marine tidal-current energy power that the power exporting electric energy receives with Blast Furnace Top Gas Recovery Turbine Unit (TRT).Calculating marine tidal-current energy device average energy output efficiency is the arithmetic mean respectively representing Energy transmission efficiency calculating each power characteristic analystal section.

The average energy output efficiency of marine tidal-current energy device calculated by following formula:

$\stackrel{\‾}{\mathrm{\η}}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\frac{{\mathrm{\η}}_i}{n}$

η _ibe the representative Energy transmission efficiency of i-th analystal section marine tidal-current energy device, calculated by following formula:

${\mathrm{\η}}_i=\frac{P_{\mathrm{ai}}}{P_{\mathrm{bi}}}$

In formula:

η _ibe the representative Energy transmission efficiency of i-th analystal section marine tidal-current energy device;

P _{ɑ i}be that i-th analystal section represents electric power value, P ɑ _ibe the p in S7 _i;

P _bibe the marine tidal-current energy power that i-th analystal section is corresponding, the marine tidal-current energy power that the Blast Furnace Top Gas Recovery Turbine Unit (TRT) front end representing flow speed value calculating acquisition by i-th analystal section is captured;

$P_{b_i}=1/2\mathrm{\ρA}{U_i}^3$

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 _ifor calculating the representative flow speed value of the i-th analystal section obtained.

The present invention is based on the real sea situation observation of short-term, the core technology index of marine tidal-current energy device is evaluated, evaluation cycle is short, 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 type selecting of enterprise, science reference frame is provided.

Accompanying drawing explanation

Fig. 1 is tidal current energy device sea situation method of testing process flow diagram of the present invention.

Fig. 2 is characteristics of output power curve map under the marine tidal current energy device sea situation in marine site, Mount Dai.

Description of symbols in figure:

S1, observation instrument is set

S2, acquisition trend and electric power output test data

S3, test data are screened

S4, division power characteristic analystal section

S5, calculate each power characteristic analystal section representative data point

S6, matching device characteristics of output power curve

The annual electricity generating capacity of S7, calculating marine tidal-current energy device

S8, calculating 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, tidal current energy device sea situation method of testing of the present invention, technical step comprises: arrange observation instrument S1, obtain trend and electric power to output test data S2, test data screening S3, divides power characteristic analystal section S4, calculate each power characteristic analystal section representative data point S5, matching device characteristics of output power curve S 6, calculates the annual electricity generating capacity S7 of marine tidal-current energy device, calculates marine tidal-current energy device average energy output efficiency S8.

S1, observation instrument is set

Detect the marine tidal-current energy power station being laid on marine site, Mount Dai, power station adopts the tidal current energy generating equipment of two-way generating.Locality is regular semi-diurnal tides, be then decided to be 8 days detection time, respectively arranges a flow velocity tester detect marine tidal-current energy device in the both sides, front and back of device.

S2, acquisition trend and electric power output test data

The electrical power monitoring instrument of enough accuracy and range is set at tidal current energy generating equipment power output end.Trend test and electric power are tested and are synchronously carried out.Within every 5 minutes, obtain once average tidal current speed data, obtain average electrical power data simultaneously, each tidal current speed data and the electric power data one_to_one corresponding gathered with the time period.Each corresponding tidal current speed data and electric power data form a data point, detect and obtain 2123 data points altogether.

S3, test data are screened

Screening weeds out the data during the too low and too high situation lower device of flow velocity quits work, for the marine tidal-current energy device of this two-way generating, retaining device duration of work carrys out the test data of flow path direction velocity observer instrument, participates in the data point of power analysis computational analysis through screening common acquisition 1331.

S4, division power characteristic analystal section

The codomain of screening acquisition 1331 data point is 0 ~ 2.48 meter per second, is divided into some intervals: be less than 0.6 flow speed data amount less, analystal section width is taken as 0.3 meter per second; 0.6 ~ 2.6 meter per second flow rates inner analysis interval width gets 0.2 meter per second.

The each interval of table 1 represents flow velocity and represents output power tables of data

S5, calculate each power characteristic analystal section representative data point

The flow speed value that the data point that statistics falls into each analystal section comprises, makes arithmetic mean to all flow speed values in interval, by the flow speed value calculated, as the representative flow speed value in this interval.(as table 1)

S6, matching device characteristics of output power curve

Utilize each analystal section representative data point obtained, utilize three least square methods to carry out matching to representative data point, the power stage power characteristic of obtaining means.(as Fig. 2)

The annual electricity generating capacity of S7, calculating marine tidal-current energy device

Annual hourage gets 8760, according to Such analysis interval division way, calculate 1331 flow speed datas and fall into different interval frequency, the estimation of different interval frequency is fallen into using this frequency as annual flow speed data, thus calculate the hourage of annual each flow velocity appearance, and then calculate power station annual electricity generating capacity, annual electricity generating capacity computing formula is as follows:

$\mathrm{AEP}=h_{\mathrm{AE}}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\frac{a_i}{N}\×p_i$

Wherein, AEP is annual electricity generating capacity;

H _aEfor year generating dutation, be taken as 8760 hours;

The analystal section number n participating in calculating is 11;

N obtains data point sum for detecting, and is 1331;

A _ifor detect obtain data measuring point comprise flow speed value and fall into i-th interval number;

P _iit is the representative output power value that i-th analystal section is corresponding

Final calculating annual electricity generating capacity is about 20,000 degree.

S8, calculating 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, and according to each interval Energy transmission flow velocity calculated and represent output power (as table 1), the average energy output efficiency calculating device is about 34.45%.

Claims (4)

1. a tidal current energy device sea situation method of testing, it is characterized in that, technical step comprises: arrange observation instrument, acquisition trend and electric power output test data, filler test data, divide power characteristic analystal section, calculate each power characteristic analystal section representative data point, matching rating of set family curve, calculates marine tidal-current energy device annual electricity generating capacity, calculates marine tidal-current energy device average energy output efficiency;

The described observation instrument that arranges carrys out flow path direction in marine tidal-current energy device dead ahead to arrange tidal current observation instrument, and the instrument laid is apart from 10 to 15 meters, marine tidal-current energy device; For the marine tidal-current energy device of bidirectional flow generating, then need before and after device, respectively arrange a tidal current observation instrument, to ensure, when the forward and reverse generating of marine tidal-current energy device, all can obtain the flow velocity of flow path direction;

Described acquisition trend and electric power output test data, marine tidal-current energy device placement tidal current speed is tested by tidal current observation instrument, electric power data tested by the electrical power monitoring instrument arranged by marine tidal-current energy device power output end, trend test and electric power are tested and are synchronously carried out, within every 5 minutes, obtain once average tidal current speed data and average electrical power data, each corresponding tidal current speed data that synchronism detection obtains and electric power data form a data point;

The annual electricity generating capacity of described calculating marine tidal-current energy device, is gone out by following formulae discovery,

$\mathrm{AEP}=h_{\mathrm{AE}}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\frac{a_i}{N}\×p_i$

In formula: AEP is annual electricity generating capacity

H _aEfor annual hourage, calculated by 8760 hours,

N is the analystal section number participating in calculating,

A _ifor falling into the data point number of i-th analystal section,

P _ibe the representative electric power value that i-th analystal section is corresponding,

N is data point sum.

2. tidal current energy device sea situation method of testing according to claim 1, it is characterized in that, described division power characteristic analystal section, the corresponding tidal current speed data obtained according to synchronism detection and the data point that forms of electric power data comprise the size of flow speed value to divide power characteristic analystal section, analystal section joins end to end, interval with between interval without overlapping, and ensure all data points all can and only can be divided in an analystal section divided; Each analystal section end point values and threshold value are interval width, and the width of analystal section gets 0.2 meter, have to be no less than 10 data points and to fall in each analystal section.

3. tidal current energy device sea situation method of testing according to claim 1, it is characterized in that, described calculating each power characteristic analystal section representative data point, that the flow speed value of data point in each interval and electric power value are calculated its arithmetic mean respectively, be by the mean flow velocity value of each analystal section calculated and average electrical power value and represent flow speed value and represent electric power value, the flow speed value of representative data point and electric power value are and represent flow speed value and represent electric power value.

4. tidal current energy device sea situation method of testing according to claim 1, is characterized in that, described calculating marine tidal-current energy device average energy output efficiency is the arithmetic mean respectively representing Energy transmission efficiency calculating each power characteristic analystal section,

The average energy output efficiency of marine tidal-current energy device calculated by following formula:

$\stackrel{\‾}{\mathrm{\η}}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}\frac{{\mathrm{\η}}_i}{n}$

η _ibe the representative Energy transmission efficiency of i-th analystal section marine tidal-current energy device, calculated by following formula:

${\mathrm{\η}}_i=\frac{P_{\mathrm{ai}}}{P_{\mathrm{bi}}}$

In formula:

η _ibe the representative Energy transmission efficiency of i-th analystal section marine tidal-current energy device,

P _{ɑ i}be that i-th analystal section represents electric power value;

P _bibe the marine tidal-current energy power that i-th analystal section is corresponding, the marine tidal-current energy power that the Blast Furnace Top Gas Recovery Turbine Unit (TRT) front end representing flow speed value calculating acquisition by i-th analystal section 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 _ifor calculating the representative flow speed value of the i-th analystal section obtained.