CN110571862A - Method and system for analyzing time sequence matching degree of photovoltaic power station and power load - Google Patents
Method and system for analyzing time sequence matching degree of photovoltaic power station and power load Download PDFInfo
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- CN110571862A CN110571862A CN201910692201.5A CN201910692201A CN110571862A CN 110571862 A CN110571862 A CN 110571862A CN 201910692201 A CN201910692201 A CN 201910692201A CN 110571862 A CN110571862 A CN 110571862A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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Abstract
the invention discloses a method and a system for analyzing the time sequence matching degree of a photovoltaic power station and a power load, wherein the method comprises the following steps: acquiring photovoltaic data and load data in a calculation area according to a time sequence based on the same time interval; acquiring annual accumulated power generation amount of the photovoltaic power station, annual accumulated power consumption amount of the power load, annual matching power generation electric quantity and matching power consumption electric quantity of the photovoltaic power station output and the power load based on the photovoltaic data and the load data; and calculating the time sequence matching degree of the output power of the photovoltaic power station and the power load based on the annual accumulated power generation amount of all the photovoltaic power stations, the annual accumulated power consumption amount of the power load and the annual matching power generation and power consumption amount. The method provides a basis for site selection and volume determination of the photovoltaic power station, measures the matching degree of the power generation output and the power load of the photovoltaic power station on the time sequence by using the characteristic index of the time sequence matching degree through long-time statistical data analysis, and provides a basic support for planning schemes of site selection, volume determination and the like of distributed photovoltaic.
Description
Technical Field
The invention relates to the field of photovoltaic power generation, in particular to a method and a system for analyzing the time sequence matching degree of a photovoltaic power station and a power load.
background
With the global energy crisis, the attention degree of each country to photovoltaic power generation is continuously increased, so that the distributed photovoltaic power generation is continuously and rapidly developed, the installed capacity is rapidly increased, and the photovoltaic power generation becomes one of important power sources in some countries. Taking China as an example, according to the statistical data of the national energy agency, the national photovoltaic power generation installation reaches 1.3 hundred million kilowatts by 2017, wherein the photovoltaic power station is 10059 ten thousand kilowatts, and the distributed photovoltaic power station is 2966 ten thousand kilowatts.
distributed photovoltaic power plant's characteristics lie in: the low-voltage class of 220V-10kV distributed on the user side is dispersed, the dispersion area is wide, and the capacity of a single power supply is small. The large-scale access of distributed photovoltaic can change the radial characteristic of the traditional power distribution network, the energy of the regional power grid is changed from single-direction flow to bidirectional flow, and the load in a low-ebb period can generate tide for transmission. After the high-proportion distributed photovoltaic is connected into a power grid, the photovoltaic power station is influenced by weather factors, uncertainty factors such as fluctuation, randomness and the like are brought to the power grid, problems such as voltage fluctuation, electric energy quality reduction, frequent tide leap and the like are caused by severe power fluctuation, and local photovoltaic absorption faces challenges.
in order to analyze the electric power and electric quantity balance characteristics of a regional power grid and improve the consumption level of distributed photovoltaic, the matching degree of a photovoltaic power station and a load needs to be researched urgently.
Disclosure of Invention
in order to overcome the defects in the prior art, the invention provides a method and a system for analyzing the time sequence matching degree of a photovoltaic power station and a power load. Because the output and the power load of the photovoltaic power station are time sequence data, the power generation and power utilization characteristics can be mastered by analyzing the time sequence matching degree, and basic support is provided for planning schemes of site selection, volume fixing and the like of distributed photovoltaic.
The invention provides a method for analyzing the time sequence matching degree of a photovoltaic power station and a power load, which comprises the following steps:
Acquiring photovoltaic data and load data in a calculation area according to a time sequence based on the same time interval;
Acquiring annual accumulated power generation amount of the photovoltaic power station, annual accumulated power consumption amount of the power load, annual matching power generation electric quantity and matching power consumption electric quantity of the photovoltaic power station output and the power load based on the photovoltaic data and the load data;
And calculating the time sequence matching degree of the output power of the photovoltaic power station and the power load based on the annual accumulated power generation amount of all the photovoltaic power stations, the annual accumulated power consumption amount of the power load and the annual matching power generation and power consumption amount.
Preferably, the acquiring, based on the photovoltaic data and the load data, the annual accumulated power generation amount of the photovoltaic power station, the annual accumulated power consumption amount of the power load, and the annual matching power generation amount and matching power consumption amount of the photovoltaic power station output and the power load includes:
obtaining a power generation interval of each day of the photovoltaic power station and an annual active power output curve of the photovoltaic power station based on the photovoltaic data;
Calculating the annual accumulated power generation capacity of the photovoltaic power station based on the daily power generation interval of the photovoltaic power station and the annual active power output curve of the photovoltaic power station;
calculating annual cumulative electricity consumption of the electrical load based on the load data;
And calculating the annual matching power generation electric quantity and the matching power consumption electric quantity of the photovoltaic power station output and the power load based on the daily power generation interval of the photovoltaic power station, the annual active output curve of the photovoltaic power station and the set daily matching threshold coefficient of the photovoltaic power station output and the power load.
preferably, the obtaining of the power generation interval of each day of the photovoltaic power station and the annual active power output curve of the photovoltaic power station based on the photovoltaic data includes:
Converting the power generation output value of each sample photovoltaic power station in the calculation area into a per unit value;
Calculating an active output mean value of the photovoltaic power stations at the same moment based on the per-unit generated output value of each sample photovoltaic power station, and obtaining estimated values of active outputs of all photovoltaic power stations under the per-unit system;
Drawing an annual active power output curve of the photovoltaic power station in the calculation area based on all sample photovoltaic power station active power output estimated values;
obtaining a power generation interval of the photovoltaic power station every day based on the power generation starting time and the power generation ending time of the photovoltaic power station every day;
The power generation starting time is the time when the active power output of the photovoltaic power station is greater than a threshold value for the first time; and the moment when the power generation is finished is the moment when the active power output of the photovoltaic power station is larger than the threshold value for the last time.
preferably, the calculating the annual accumulated power generation capacity of the photovoltaic power station based on the daily power generation interval of the photovoltaic power station and the annual active power output curve of the photovoltaic power station includes:
In the daily power generation interval of the photovoltaic power station, calculating the daily total day accumulated power generation amount of all photovoltaic power stations in the area based on the annual active power output curve of the photovoltaic power station;
And calculating the annual accumulated power generation of all the photovoltaic power stations in the area based on the daily accumulated power generation of all the photovoltaic power stations in the area.
Preferably, the calculating the annual cumulative power consumption of the electric power load based on the load data includes:
In the daily power generation interval of the photovoltaic power station, calculating the daily total daily accumulated power consumption of the power load in the area based on the daily power load active value in the area;
and calculating the annual accumulated power consumption of the power loads in the area based on the daily accumulated power consumption of the power loads in the area.
preferably, based on the daily power generation interval of the photovoltaic power station, the annual active power output curve of the photovoltaic power station and the set matching threshold coefficient of the photovoltaic power station output and the power load every day, the annual matching power generation quantity and the matching power consumption quantity of the photovoltaic power station output and the power load are calculated, and the method includes the following steps:
In the daily power generation interval of the photovoltaic power station, calculating the daily matching power generation power and the daily matching power consumption power of the photovoltaic power station output and the power load in each moment area based on the annual active power output curve of the photovoltaic power station and the daily matching threshold coefficient of the photovoltaic power station output and the power load;
calculating the matching power generation quantity and the matching power consumption quantity of the photovoltaic power station output and the power load in each area every day based on the matching power generation power and the matching power consumption power of the photovoltaic power station output and the power load in each time area every day;
and calculating the annual matching power generation electric quantity and the annual matching power utilization electric quantity of the output of the photovoltaic power station and the power load in the region based on the daily matching power generation electric quantity and the matching power utilization electric quantity of the output of the photovoltaic power station and the power load in the region.
Preferably, the matching generated power of the photovoltaic power station output and the power load in each time region every day is calculated according to the following formula:
in the formula: pmatchPV,d,t: matching power generation power of the photovoltaic power station output power and the power load in the area at the time t on the day d; pPVN: the total installed capacity of all photovoltaic power stations in the area; pPV,d,t*: the active power output estimated value of the photovoltaic power station in the area under the per-unit mode; pL,d,t: the active value of the power load in the area at the time t on the day d; epsilonmatch: matching threshold coefficients of photovoltaic power station output and power load every day; sN: rated capacity of lines or substations within a region;
the matching power consumption of the photovoltaic power station output and the power load in each time region every day is calculated according to the following formula:
In the formula: pmatchL,d,t: and d, matching power utilization between the output of the photovoltaic power station and the power load in the area at the time t on the day.
Preferably, the time sequence matching degree of the output of the photovoltaic power station and the power load is calculated according to the following formula:
In the formula: kmatch: the time sequence matching degree of the output of the photovoltaic power station and the power load; ematchPV: the output of the photovoltaic power station in the region is matched with the annual power generation quantity of the power load; ematchL: the annual matching electricity consumption quantity of the output of the photovoltaic power station and the power load in the region is obtained; ePV: the annual accumulated power generation of all photovoltaic power stations in the area; eL: annual cumulative electricity usage of power loads in a regionamount of the compound (A).
Preferably, the acquiring photovoltaic data and load data in a calculation area in time series based on the same time interval includes:
selecting a plurality of photovoltaic power stations in the calculation area as sample photovoltaic power stations based on the calculation area, and collecting historical power generation output data of the sample photovoltaic power stations in one whole year and historical power load data of the sample photovoltaic power stations in one whole year;
And eliminating abnormal data beyond a set range from the historical power generation output data and the historical power load data.
Based on the same invention concept, the invention also provides a system for analyzing the time sequence matching degree of the photovoltaic power station and the power load, which comprises the following steps:
The acquisition module is used for acquiring photovoltaic data and load data in the calculation area at the same time interval according to time sequence;
The intermediate calculation module is used for acquiring annual accumulated power generation amount of the photovoltaic power station, annual accumulated power consumption amount of the power load, annual matching power generation electric quantity and matching power consumption electric quantity of the photovoltaic power station output and the power load based on the photovoltaic data and the load data;
and the time sequence matching degree calculating module is used for calculating the time sequence matching degree of the output power of the photovoltaic power station and the power load based on the annual accumulated power generation amount of all the photovoltaic power stations, the annual accumulated power consumption amount of the power load and the annual matching power generation and power consumption amount.
Preferably, the intermediate computing module includes:
The photovoltaic data processing unit is used for obtaining the power generation interval of each day of the photovoltaic power station and the annual active power output curve of the photovoltaic power station based on the photovoltaic data;
the photovoltaic power generation unit is used for calculating the annual accumulated power generation of the photovoltaic power station based on the daily power generation interval of the photovoltaic power station and the annual active power output curve of the photovoltaic power station;
A load electricity consumption calculating unit for calculating the annual accumulated electricity consumption of the electric load based on the load data;
And the power consumption calculating and matching unit is used for calculating the annual matching power generation quantity and the matching power consumption quantity of the photovoltaic power station output and the power load based on the daily power generation interval of the photovoltaic power station, the annual active power output curve of the photovoltaic power station and the set daily matching threshold coefficient of the photovoltaic power station output and the power load.
Compared with the prior art, the invention has the beneficial effects that:
According to the technical scheme provided by the invention, the photovoltaic data and the load data in the calculation area are obtained according to the time sequence based on the same time interval; acquiring annual accumulated power generation amount of the photovoltaic power station, annual accumulated power consumption amount of the power load, annual matching power generation electric quantity and matching power consumption electric quantity of the photovoltaic power station output and the power load based on the photovoltaic data and the load data; the method comprises the steps of calculating the time sequence matching degree of the output of the photovoltaic power station and the power load based on the annual accumulated power generation amount of all the photovoltaic power stations, the annual accumulated power consumption of the power load and annual matching power generation and power consumption of all the photovoltaic power stations.
the technical scheme provided by the invention has the advantages of clear flow, easily obtained data source and convenience in calculation, and is suitable for distributed photovoltaic access distribution networks with multiple points and wide range.
Drawings
Fig. 1 is a flow chart of an analysis method of the matching degree of the photovoltaic power station and the power load timing sequence in the embodiment.
fig. 2 is a detailed flowchart of an analysis method for timing matching between a photovoltaic power plant and a power load in the embodiment.
Fig. 3 is a per unit value curve of active power output of the photovoltaic power station all year round in the embodiment.
Fig. 4 is a history of annual power loads in the example.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
Example 1
as shown in fig. 1, the method for analyzing the time sequence matching degree between a photovoltaic power station and a power load provided by the invention comprises the following steps:
Step S1, acquiring photovoltaic data and load data in a calculation area according to time sequence based on the same time interval;
step S2, acquiring annual accumulated power generation amount of the photovoltaic power station, annual accumulated power consumption amount of the power load, annual matching power generation electric quantity and matching power consumption electric quantity of the photovoltaic power station output and the power load based on the photovoltaic data and the load data;
and step S3, calculating the time sequence matching degree of the output power of the photovoltaic power station and the power load based on the annual accumulated power generation amount of all the photovoltaic power stations, the annual accumulated power consumption amount of the power load and the annual matching power generation and power consumption amount.
step S1, acquiring photovoltaic data and load data in the calculation area according to time sequence based on the same time interval, comprising the following steps:
and calculating the per unit value of the historical generated output data of the photovoltaic power station in the region. Selecting n photovoltaic power stations in an access area as sample power stations, collecting historical generated output data of the sample power stations for 365 days in a whole year, and removing abnormal data.
historical power load data within the collection area. And selecting historical power loads of 365 days in the whole year in the area, and rejecting abnormal data.
the time interval of the power load data and the time interval of the photovoltaic power plant power generation data must be kept consistent.
in this embodiment, there may be 10 photovoltaic power stations in an area, but the workload of acquiring data of 10 power stations is too large, so only data of 1-2 sample power stations need to be acquired, the data of the sample power stations are converted into per unit values, and the total capacity of the 10 power stations is multiplied as an estimated value of the output of all the power stations.
The abnormal data is data beyond the common knowledge in the art, such as a capacity-installed 10MW power station, abnormal data if the output reaches 20MW, or abnormal data if the output is positive.
step S2, acquiring annual accumulated generated energy of the photovoltaic power station, annual accumulated power consumption of the power load, annual matching generated power quantity and matching power consumption quantity of the photovoltaic power station output and the power load based on the photovoltaic data and the load data, and comprising the following steps:
Step one, the typical value interval dt of the generated output data is 1-15 minutes. Taking the rated installed capacity as a reference value, converting the famous generated output value of the photovoltaic power station into a per unit value, wherein the calculation formula is as follows:
Wherein, PPVi,d,tIs the nominal value P of the active power output of the ith sample photovoltaic power station at the d day t momentPVi,d,t*Is the active output per unit value P of the ith sample photovoltaic power station at the d day t moment under the per unit systemPVNiFor the rated installed capacity of the ith sample photovoltaic power plant, i is 1,2,3, …, and n, d is 1,2,3, …, 365.
And step two, calculating an annual active power output curve of the photovoltaic power station in the region. Calculating the active power output mean value of n photovoltaic power stations at the same moment to obtain the active power output estimated value of the photovoltaic power station in the region under the per-unit system, wherein the calculation formula is as follows:
Wherein n is the number of the sample photovoltaic power stations, PPV,d,t*the active output estimation value of the photovoltaic power station in the area under the per unit system is obtained.
step three, calculating the power generation starting time t of the photovoltaic power station every daystartAnd a power generation end time tendObtaining the power generation time interval t of the photovoltaic power station every dayPV. According to the photovoltaic power station output estimation data, the power station active output PPV,d,t*is greater than epsilon for the first time1Time of day ofthe power station active power output is larger than epsilon for the last time at the moment of starting power generation1The time of (d) is the end of power generation time. Determining epsilon according to original data condition of power station1，ε1The typical value range of (1) is 0-0.05 pu. Photovoltaic power station power generation time interval tPVIs the time interval from the starting time of power generation to the ending time of power generationstart,tend]。
step four, in the power generation interval t of the photovoltaic power stationPVAnd calculating the daily total-day accumulated power generation amount of all photovoltaic power stations in the area, wherein the calculation formula is as follows:
wherein E isPV,dThe total day accumulated power generation amount of the day d photovoltaic power station, td,startThe moment when the photovoltaic power station starts to generate power on day d, td,endfor the moment when the photovoltaic power station finishes generating electricity on day d, PPVNthe total installed capacity of all photovoltaic power stations in the area.
step five, in the power generation interval t of the photovoltaic power stationPVAnd in the region, calculating the total annual 365-day accumulated power generation of all photovoltaic power stations in the region, wherein the calculation formula is as follows:
Wherein E isPVThe method is the accumulated power generation of all photovoltaic power stations in the region for 365 days all the year round.
Step six, in the power generation interval t of the photovoltaic power stationPVand calculating the total daily accumulated power consumption of the power load in the area, wherein the calculation formula is as follows:
Wherein E isL,dFor the cumulative electricity consumption, P, of the electric load in the area on day dL,d,tthe value is the active value of the power load in the area at the time t on the d-th day.
Step seven, photovoltaic power generationStation power generation interval tPVAnd calculating the annual accumulated power consumption of the power load in the area, wherein the calculation formula is as follows:
Wherein E isLthe electricity usage is accumulated for the entire year of the electrical loads in the area.
step eight, in the power generation interval t of the photovoltaic power stationPVand calculating the matching power generation power and the matching power consumption power of the photovoltaic power station output and the power load in each time region every day. The calculation formula is as follows:
Wherein, PmatchPV,d,tThe generated power P is the matched power generation power of the photovoltaic power station output and the power load in the area of the day d and the time tmatchL,d,tthe matched power consumption of the photovoltaic power station output and the power load in the area of the day d and the time t, SNThe rated capacity of the line or substation in the area. EpsilonmatchThe typical value interval is 10-30% for the matching threshold coefficient of the photovoltaic power station output and the power load every day.
When the absolute value of the deviation between the output of the photovoltaic power station and the power load in the region is less than or equal to epsilonmatchSNWhen the power is matched with the power load, the matched power generation power is equal to the power output of the photovoltaic power station, and the matched power consumption power is equal to the power load power; when the absolute value of the deviation between the output of the photovoltaic power station and the power load in the region is larger than epsilonmatchSNAnd in the time, the output of the photovoltaic power station is not matched with the power load, and the matching power generation power and the matching power consumption power are both equal to 0.
step nine, in the power generation interval t of the photovoltaic power stationPVIn the calculation area, the output of the photovoltaic power station and the power load are matched with the power generation capacity every day all dayAnd matching the power consumption, wherein the calculation formula is as follows:
Wherein E ismatchPV,dmatching the output of the photovoltaic power station with the power load in the d-th day area for the whole day of the power generation, EmatchL,dAnd matching the power consumption of the photovoltaic power station output power and the power load all day in the day d region.
step ten, in a power generation interval t of the photovoltaic power stationPVin, the annual matching power generation capacity and the matching power consumption capacity of photovoltaic power station output and power load in the calculation area are calculated, and the calculation formula is as follows:
wherein E ismatchPV,dFor annual matching of the output of the photovoltaic power station with the power load in the area, EmatchL,dThe power consumption quantity is matched with the annual power consumption quantity of the power load for the output of the photovoltaic power station in the region.
Step S3, based on the annual accumulated power generation amount of all the photovoltaic power stations, the annual accumulated power consumption amount of the power load and the annual matching power generation and power consumption amount, calculating the time sequence matching degree of the photovoltaic power station output and the power load according to the following formula:
Example 2
As shown in fig. 2, in this embodiment, taking 365 days of a complete year as an example, the analysis is performed based on the method for analyzing the time sequence matching degree between the photovoltaic power station and the power load provided by the present invention, and includes the following steps:
step one, calculating a per unit value of historical generated output data of the sample photovoltaic power station in the region. The selected 2 photovoltaic power stations accessed to the power grids in the area are sample power stations, historical generated output data of the sample power stations in 365 days in a whole year are collected, and abnormal data are removed. The interval dt of the generated output data takes 5 minutes. Taking the rated installed capacity as a reference value, converting the famous generated output value of the photovoltaic power station into a per unit value, wherein the calculation formula is as follows:
Wherein, PPVi,d,tIs the nominal value P of the active power output of the ith sample photovoltaic power station at the d day t momentPVi,d,t*Is the active output per unit value P of the ith sample photovoltaic power station at the d day t moment under the per unit systemPVNiThe rated installed capacity of the ith sample photovoltaic power plant is 1,2, and 1,2,3, …, 365.
And step two, calculating an annual active power output curve of the photovoltaic power station in the region. Calculating the active power output mean value of 2 photovoltaic power stations at the same moment to obtain the active power output estimated value of the photovoltaic power station in the region under the per-unit system, wherein the calculation formula is as follows:
Wherein, PPV,d,t*The active output estimation value of the photovoltaic power station in the area under the per unit system is obtained.
As shown in fig. 3, an active power output per unit value curve of the photovoltaic power station throughout the year is drawn.
Step three, calculating the power generation starting time t of the photovoltaic power station every daystartand a power generation end time tendobtaining the power generation time interval t of the photovoltaic power station every dayPV. According to the photovoltaic power station output estimation data, the power station active output PPV,d,t*Is greater than epsilon for the first time1The moment of (1) is the moment of starting power generation, and the active power output of the power station is greater than epsilon for the last time1Is the end ofand (5) generating power. According to the original data conditions of the power station, epsilon1Setting the power value to be 0pu, the starting time of the photovoltaic power station on the first day is 7:25, the ending time of the photovoltaic power station is 17:05, and the power generation time interval is [7:25,17:05 ]]. Similarly, power generation time intervals for other days can be obtained.
step four, in the power generation interval t of the photovoltaic power stationPVand calculating the daily total-day accumulated power generation amount of all photovoltaic power stations in the area, wherein the calculation formula is as follows:
Wherein E isPV,dthe total day accumulated power generation amount of the day d photovoltaic power station, td,startThe moment when the photovoltaic power station starts to generate power on day d, td,endFor the moment when the photovoltaic power station finishes generating electricity on day d, PPVNThe total installed capacity of all photovoltaic power stations in the area.
the total-day accumulated power generation amount of all photovoltaic power stations in a certain day area is 4.96 MWh.
step five, in the power generation interval t of the photovoltaic power stationPVAnd in the region, calculating the total annual 365-day accumulated power generation of all photovoltaic power stations in the region, wherein the calculation formula is as follows:
wherein E isPVThe method is the accumulated power generation of all photovoltaic power stations in the region for 365 days all the year round.
The total 365-day cumulative power generation amount of all photovoltaic power stations in the area all year round can be obtained to be 2971.86 MWh.
And step six, collecting historical power load data in the region. And selecting historical power loads of 365 days in the whole year in the area, and rejecting abnormal data. The time interval of the power load data and the time interval of the photovoltaic power plant power generation data must be kept consistent. Fig. 4 shows a yearly history of the electrical load.
Seventhly, in the power generation interval t of the photovoltaic power stationPVinner, inner computing area inner electricityThe total daily accumulated electricity consumption of the force load is calculated by the following formula:
Wherein E isL,dfor the cumulative electricity consumption, P, of the electric load in the area on day dL,d,tThe value is the active value of the power load in the area at the time t on the d-th day.
The total day cumulative electricity consumption of the power load in a certain day area can be obtained as 14.49 MWh.
Step eight, in the power generation interval t of the photovoltaic power stationPVAnd calculating the annual accumulated power consumption of the power load in the area, wherein the calculation formula is as follows:
Wherein E isLThe electricity usage is accumulated for the entire year of the electrical loads in the area.
the annual cumulative electricity usage of the electric loads in the area can be obtained as 6303.9 MWh.
Step nine, in the power generation interval t of the photovoltaic power stationPVAnd calculating the matching power generation power and the matching power consumption power of the photovoltaic power station output and the power load in each time region every day. The calculation formula is as follows:
Wherein, PmatchPV,d,tThe generated power P is the matched power generation power of the photovoltaic power station output and the power load in the area of the day d and the time tmatchL,d,tThe matched power consumption of the photovoltaic power station output and the power load in the area of the day d and the time t, SNthe rated capacity of the line or substation in the area. EpsilonmatchFor the daily matching threshold coefficient of photovoltaic power plant output and power load, typicallythe value range is 10-30%.
Measuring the rated volume to 6MW, and matching the threshold coefficient epsilonmatchTaking 20%, when the absolute value of the deviation between the photovoltaic power station output and the power load in the region is less than or equal to 1.2MW, the matching power generation power is equal to the photovoltaic power station output, and the matching power consumption power is equal to the power load power; when the absolute value of the deviation between the output of the photovoltaic power station and the power load in the region is larger than 1.2MW, the output of the photovoltaic power station is not matched with the power load, and the matching power generation power and the matching power consumption power are both equal to 0.
Step ten, in a power generation interval t of the photovoltaic power stationPVIn, photovoltaic power plant is exerted oneself and the whole day matching electricity generation electric quantity of power load every day in the calculation region and is matchd the power consumption electric quantity, and the computational formula is:
Wherein E ismatchPV,dMatching the output of the photovoltaic power station with the power load in the day d region throughout the day to generate electric power, EmatchL,dand matching the power consumption of the photovoltaic power station output and the power load in the day d region all day.
The total day matching power generation capacity of the photovoltaic power station output and the power load in a certain day area is 4.22MWh, and the total day matching power consumption capacity is 9.02 MWh.
Eleven, in a photovoltaic power station power generation interval tPVIn, the annual matching power generation capacity and the matching power consumption capacity of photovoltaic power station output and power load in the calculation area are calculated, and the calculation formula is as follows:
Wherein EmatchPV,dfor annual matching of the output of the photovoltaic power station with the power load in the area, EmatchL,dThe power consumption quantity is matched with the annual power consumption quantity of the power load for the output of the photovoltaic power station in the region.
the annual matching power generation capacity of the photovoltaic power station output and the power load in the region is 2496.11MWh, and the annual matching power consumption capacity is 3976.1 MWh.
Twelfth, in the power generation interval t of the photovoltaic power stationPVand calculating the time sequence matching degree of the photovoltaic power station output and the power load in the region, wherein the calculation formula is as follows:
The time sequence matching degree of the output of the photovoltaic power station and the power load in the region is 0.53. Degree of timing matching KmatchIs a coefficient between 0 and 1, KmatchThe higher the output of the power station, the better the timing matching between the output of the power station and the power load.
example 3
based on the same inventive concept, the embodiment of the invention also provides a system for analyzing the time sequence matching degree of the photovoltaic power station and the power load, which comprises the following steps:
The acquisition module is used for acquiring photovoltaic data and load data in the calculation area at the same time interval according to time sequence;
the intermediate calculation module is used for acquiring annual accumulated power generation amount of the photovoltaic power station, annual accumulated power consumption amount of the power load, annual matching power generation electric quantity and matching power consumption electric quantity of the photovoltaic power station output and the power load based on the photovoltaic data and the load data;
And the time sequence matching degree calculating module is used for calculating the time sequence matching degree of the output power of the photovoltaic power station and the power load based on the annual accumulated power generation amount of all the photovoltaic power stations, the annual accumulated power consumption amount of the power load and the annual matching power generation and power consumption amount.
Preferably, the intermediate computing module includes:
The photovoltaic data processing unit is used for obtaining the power generation interval of each day of the photovoltaic power station and the annual active power output curve of the photovoltaic power station based on the photovoltaic data;
The photovoltaic power generation unit is used for calculating the annual accumulated power generation of the photovoltaic power station based on the daily power generation interval of the photovoltaic power station and the annual active power output curve of the photovoltaic power station;
A load electricity consumption calculating unit for calculating the annual accumulated electricity consumption of the electric load based on the load data;
And the power consumption calculating and matching unit is used for calculating the annual matching power generation quantity and the matching power consumption quantity of the photovoltaic power station output and the power load based on the daily power generation interval of the photovoltaic power station, the annual active power output curve of the photovoltaic power station and the set daily matching threshold coefficient of the photovoltaic power station output and the power load.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
the present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
these computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (11)
1. A method for analyzing the time sequence matching degree of a photovoltaic power station and a power load is characterized by comprising the following steps:
Acquiring photovoltaic data and load data in a calculation area according to a time sequence based on the same time interval;
Acquiring annual accumulated power generation amount of the photovoltaic power station, annual accumulated power consumption amount of the power load, annual matching power generation electric quantity and matching power consumption electric quantity of the photovoltaic power station output and the power load based on the photovoltaic data and the load data;
And calculating the time sequence matching degree of the output power of the photovoltaic power station and the power load based on the annual accumulated power generation amount of all the photovoltaic power stations, the annual accumulated power consumption amount of the power load and the annual matching power generation and power consumption amount.
2. the method of claim 1, wherein obtaining the annual cumulative power generation of the photovoltaic power plant, the annual cumulative power usage of the electrical load, and the annual matching power generation and usage of the photovoltaic power plant output to the electrical load based on the photovoltaic data and the load data comprises:
Obtaining a power generation interval of each day of the photovoltaic power station and an annual active power output curve of the photovoltaic power station based on the photovoltaic data;
calculating the annual accumulated power generation capacity of the photovoltaic power station based on the daily power generation interval of the photovoltaic power station and the annual active power output curve of the photovoltaic power station;
Calculating annual cumulative electricity consumption of the electrical load based on the load data;
And calculating the annual matching power generation electric quantity and the matching power consumption electric quantity of the photovoltaic power station output and the power load based on the daily power generation interval of the photovoltaic power station, the annual active output curve of the photovoltaic power station and the set daily matching threshold coefficient of the photovoltaic power station output and the power load.
3. The method of claim 2, wherein obtaining the photovoltaic power plant daily power generation interval and the photovoltaic power plant annual active power output curve based on the photovoltaic data comprises:
Converting the power generation output value of each sample photovoltaic power station in the calculation area into a per unit value;
Calculating an active output mean value of the photovoltaic power stations at the same moment based on the per-unit value of the generated output of each sample photovoltaic power station, and obtaining estimated values of the active outputs of all the sample photovoltaic power stations under the per-unit system;
Drawing an annual active power output curve of the photovoltaic power station in the calculation area based on the estimated value of the active power output of all the sample photovoltaic power stations;
Obtaining a power generation interval of the photovoltaic power station every day based on the power generation starting time and the power generation ending time of the photovoltaic power station every day;
The power generation starting time is the time when the active power output of the photovoltaic power station is greater than a threshold value for the first time; and the moment when the power generation is finished is the moment when the active power output of the photovoltaic power station is larger than the threshold value for the last time.
4. the method of claim 2, wherein calculating the annual cumulative power production of the photovoltaic power plant based on the daily power generation interval of the photovoltaic power plant and the annual active power output curve of the photovoltaic power plant comprises:
in the daily power generation interval of the photovoltaic power station, calculating the daily total day accumulated power generation amount of all photovoltaic power stations in the area based on the annual active power output curve of the photovoltaic power station;
And calculating the annual accumulated power generation of all the photovoltaic power stations in the area based on the daily accumulated power generation of all the photovoltaic power stations in the area.
5. The method of claim 2, wherein said calculating a yearly cumulative power usage for the electrical loads based on said load data comprises:
In the daily power generation interval of the photovoltaic power station, calculating the daily total daily accumulated power consumption of the power load in the area based on the daily power load active value in the area;
And calculating the annual accumulated power consumption of the power loads in the area based on the daily accumulated power consumption of the power loads in the area.
6. the method of claim 2, wherein calculating the annual matching generated electricity quantity and matching electricity consumption quantity of the photovoltaic power plant output and the electrical load based on the daily power generation interval of the photovoltaic power plant, the annual active output curve of the photovoltaic power plant, and the set daily matching threshold coefficient of the photovoltaic power plant output and the electrical load comprises:
In the daily power generation interval of the photovoltaic power station, calculating the daily matching power generation power and the daily matching power consumption power of the photovoltaic power station output and the power load in each moment area based on the annual active power output curve of the photovoltaic power station and the daily matching threshold coefficient of the photovoltaic power station output and the power load;
calculating the matching power generation quantity and the matching power consumption quantity of the photovoltaic power station output and the power load in each area every day based on the matching power generation power and the matching power consumption power of the photovoltaic power station output and the power load in each time area every day;
and calculating the annual matching power generation electric quantity and the annual matching power utilization electric quantity of the output of the photovoltaic power station and the power load in the region based on the daily matching power generation electric quantity and the matching power utilization electric quantity of the output of the photovoltaic power station and the power load in the region.
7. The method of claim 6, wherein the daily matching generated power of photovoltaic plant output and electrical load in each time zone is calculated as:
In the formula: pmatchPV,d,t: matching power generation power of the photovoltaic power station output power and the power load in the area at the time t on the day d; pPVN: the total installed capacity of all photovoltaic power stations in the area; pPV,d,t*: the active power output estimated value of the photovoltaic power station in the area under the per-unit mode; pL,d,t: the active value of the power load in the area at the time t on the day d; epsilonmatch: matching threshold coefficients of photovoltaic power station output and power load every day; sN: rated capacity of lines or substations within a region;
The matching power consumption of the photovoltaic power station output and the power load in each time region every day is calculated according to the following formula:
In the formula: pmatchL,d,t: and d, matching power utilization between the output of the photovoltaic power station and the power load in the area at the time t on the day.
8. the method of claim 1, wherein the timing match of the photovoltaic plant output to the power load is calculated as:
In the formula: kmatch: the time sequence matching degree of the output of the photovoltaic power station and the power load; ematchPV: the output of the photovoltaic power station in the region is matched with the annual power generation quantity of the power load; ematchL: the annual matching electricity consumption quantity of the output of the photovoltaic power station and the power load in the region is obtained; ePV: the annual accumulated power generation of all photovoltaic power stations in the area; eL: the annual cumulative power usage of the electrical loads in the area.
9. the method of claim 1, wherein the obtaining photovoltaic data and load data in a calculation area in time series based on the same time interval comprises:
Selecting a plurality of photovoltaic power stations in the calculation area as sample photovoltaic power stations based on the calculation area, and collecting historical power generation output data of the sample photovoltaic power stations in one complete year and historical power load data of the sample photovoltaic power stations in one complete year;
And eliminating abnormal data beyond a set range from the historical power generation output data and the historical power load data.
10. The utility model provides a photovoltaic power plant and electric power load's chronogenesis matching degree analytic system which characterized in that includes:
the acquisition module is used for acquiring photovoltaic data and load data in the calculation area at the same time interval according to time sequence;
the intermediate calculation module is used for acquiring annual accumulated power generation amount of the photovoltaic power station, annual accumulated power consumption amount of the power load, annual matching power generation electric quantity and matching power consumption electric quantity of the photovoltaic power station output and the power load based on the photovoltaic data and the load data;
And the time sequence matching degree calculating module is used for calculating the time sequence matching degree of the output power of the photovoltaic power station and the power load based on the annual accumulated power generation amount of all the photovoltaic power stations, the annual accumulated power consumption amount of the power load and the annual matching power generation and power consumption amount.
11. The system of claim 10, wherein the intermediate computing module comprises:
The photovoltaic data processing unit is used for obtaining the power generation interval of each day of the photovoltaic power station and the annual active power output curve of the photovoltaic power station based on the photovoltaic data;
The photovoltaic power generation unit is used for calculating the annual accumulated power generation of the photovoltaic power station based on the daily power generation interval of the photovoltaic power station and the annual active power output curve of the photovoltaic power station;
A load electricity consumption calculating unit for calculating the annual accumulated electricity consumption of the electric load based on the load data;
And the power consumption calculating and matching unit is used for calculating the annual matching power generation quantity and the matching power consumption quantity of the photovoltaic power station output and the power load based on the daily power generation interval of the photovoltaic power station, the annual active power output curve of the photovoltaic power station and the set daily matching threshold coefficient of the photovoltaic power station output and the power load.
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| CN117096955A (en) * | 2023-10-08 | 2023-11-21 | 南京允能日新智慧能源有限公司 | Distributed photovoltaic cluster operation control system |
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| CN114552582A (en) * | 2022-04-27 | 2022-05-27 | 广东电网有限责任公司佛山供电局 | Real-time power generation load estimation method and system for photovoltaic power generation users |
| CN117096955A (en) * | 2023-10-08 | 2023-11-21 | 南京允能日新智慧能源有限公司 | Distributed photovoltaic cluster operation control system |
| CN117096955B (en) * | 2023-10-08 | 2024-03-19 | 南京允能日新智慧能源有限公司 | Distributed photovoltaic cluster operation control system |
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