CN105139267A - Photovoltaic system calculating method - Google Patents

Abstract

The invention discloses a photovoltaic system calculating method. The photovoltaic system calculating method is a method for determining a photovoltaic array interval, and the determining principle is that photovoltaic assemblies are not shielded from 9:00 to p.m. 3:00 on the day of the winter solstice. The photovoltaic system calculating method is convenient and accurate.

Description

A kind of method that photovoltaic system calculates

Technical field

The present invention relates to a kind of method that photovoltaic system calculates.

Background technology

Along with the energy in worldwide lacks and the aggravation of environmental problem, the regenerative resources such as development and utilization sun power, have become for a change following energy structure, maintain the grand strategy of the sustainable development of human society.China is energy-consuming big country, and greatly developing new forms of energy and regenerative resource has become China and readjust the energy structure, alleviate energy supply and demand contradiction, reduce environmental pollution, realizes the Important Action of sustainable development.Sun power is as a kind of inexhaustible, nexhaustible clean energy resource, and solar energy power generating has made positive exemplary role to economize energy, protection of the environment, has the value of popularity.The newly-increased grid-connected photovoltaic power generation capacity 10.6GW of China in 2014, accumulative installed capacity is only second to Germany, occupies second place of the world, and photovoltaic plant size expansion in 2015 will reach 17.8GW.Lot of domestic and foreign esbablished corporation all starts using solar photovoltaic power field in every way, this sunshine industry of layout.The requirement of photovoltaic generating system to designer of development is more and more higher, and some errors often appear in the calculating of loaded down with trivial details repetition.Meanwhile, high-quality, the roofing that can be used for doing photovoltaic generation and ground resource also along with the expansion of photovoltaic system reduces day by day, the high request for photovoltaic system efficiency is also extremely urgent.How to maximally utilise one of most important consideration object when sun power becomes present design of photovoltaic power station.

Summary of the invention

The object of the present invention is to provide a kind of method that convenience, accurately photovoltaic system calculate.

Technical solution of the present invention is:

The method that photovoltaic system calculates, is characterized in that: the method that described photovoltaic system calculates determines the method for photovoltaic arrays spacing:

Determine principle be the 9:00 on the same day in Winter Solstice to 3:00 in afternoon, photovoltaic module should not be blocked;

Solar cell array spacing d, try to achieve from following 4 formula:

D=Lcosγ

L=H/tanα

h=arcsin(sinφsinδ+cosφcosδcosω)

γ=arcsin(cosδsinω/cosh)

In formula, d-solar cell array spacing;

lthe projection on the ground of-solar rays;

γ-solar azimuth;

αangle between-sunlight ray and ground;

βthe inclination angle that-solar panel is installed;

δ-solar declination;

φthe latitude of-solar panel infield;

W-is the length of solar panel dip plane;

First calculating 9:00 sun angle in the morning in Winter Solstice and solar azimuth; During Winter Solstice, declination angle δ is-23.40, and the morning, the hour angle ω of 9:00 was 45 so, have:

h=arcsin(0.648cosφ?0.39sinφ)

γ=arcsin(0.917×0.707/cosh)

Obtain sun altitude hand solar azimuth γafter, the projected length of sunshine after square formation can be obtained l, then will lvertical range between conversion to front two rows square formation d:

D=Lcosγ=Hcosγ/tanh。

The present invention is convenient, accurate.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the invention will be further described.

Fig. 1 is the schematic diagram of assembly before and after photovoltaic of the present invention.

Embodiment

The method that photovoltaic system calculates, the method that described photovoltaic system calculates determines the method for photovoltaic arrays spacing:

Determine principle be the 9:00 on the same day in Winter Solstice to 3:00 in afternoon, photovoltaic module should not be blocked;

Solar cell array spacing d, try to achieve from following 4 formula:

D=Lcosγ

L=H/tanα

h=arcsin(sinφsinδ+cosφcosδcosω)

γ=arcsin(cosδsinω/cosh)

In formula, d-solar cell array spacing;

lthe projection on the ground of-solar rays;

γ-solar azimuth;

αangle between-sunlight ray and ground;

βthe inclination angle that-solar panel is installed;

δ-solar declination;

φthe latitude of-solar panel infield;

W-is the length of solar panel dip plane;

First calculating 9:00 sun angle in the morning in Winter Solstice and solar azimuth; During Winter Solstice, declination angle δ is-23.40, and the morning, the hour angle ω of 9:00 was 45 so, have:

h=arcsin(0.648cosφ?0.39sinφ)

γ=arcsin(0.917×0.707/cosh)

Obtain sun altitude hand solar azimuth γafter, the projected length of sunshine after square formation can be obtained l, then will lvertical range between conversion to front two rows square formation d:

D=Lcosγ=Hcosγ/tanh。

Claims (1)

1. a method for photovoltaic system calculating, is characterized in that: the method that described photovoltaic system calculates determines the method for photovoltaic arrays spacing:

Determine principle be the 9:00 on the same day in Winter Solstice to 3:00 in afternoon, photovoltaic module should not be blocked;

Solar cell array spacing d, try to achieve from following 4 formula:

D=Lcosγ

L=H/tanα

h=arcsin(sinφsinδ+cosφcosδcosω)

γ=arcsin(cosδsinω/cosh)

In formula, d-solar cell array spacing;

lthe projection on the ground of-solar rays;

γ-solar azimuth;

αangle between-sunlight ray and ground;

βthe inclination angle that-solar panel is installed;

δ-solar declination;

φthe latitude of-solar panel infield;

W-is the length of solar panel dip plane;

First calculating 9:00 sun angle in the morning in Winter Solstice and solar azimuth; During Winter Solstice, declination angle δ is-23.40, and the morning, the hour angle ω of 9:00 was 45 so, have:

h=arcsin(0.648cosφ?0.39sinφ)

γ=arcsin(0.917×0.707/cosh)

Obtain sun altitude hand solar azimuth γafter, the projected length of sunshine after square formation can be obtained l, then will lvertical range between conversion to front two rows square formation d:

D=Lcosγ=Hcosγ/tanh。