JP2012137830A5

JP2012137830A5 -

Info

Publication number: JP2012137830A5
Application number: JP2010288058A
Authority: JP
Filing date: 2010-12-24
Publication date: 2013-11-21

Description

上記課題を解決するためになされた本発明は、太陽光を受光することにより直流の電力を発電する太陽電池を複数備えると共に、その複数の太陽電池の各々にて発電された直流の発電電力を交流電力に変換する電力変換装置を備え、複数の太陽電池は、予め決められた同等特性分類基準に基づいて発電特性が同等（完全一致を含む）であると認められる一又は複数の太陽電池を１つのグループとして、異なる２つ以上のグループに分類可能である。 The present invention made in order to solve the above-mentioned problems includes a plurality of solar cells that generate direct-current power by receiving sunlight, and the direct-current generated power generated by each of the solar cells. A plurality of solar cells are provided with a power conversion device for converting into AC power, and one or a plurality of solar cells whose power generation characteristics are recognized to be equivalent (including exact match) based on a predetermined equivalent characteristic classification standard One group can be classified into two or more different groups.

従って、本発明の太陽光発電システムによれば、同等の発電特性を有する太陽電池同士でグループ化されると共に、グループ毎に最大電力点追従制御が行われるため、複数の太陽電池の発電特性にバラツキがあっても、最大電力点追従制御によって各太陽電池が自身以外の他の太陽電池の発電特性の影響を受けて発電出力が抑えられてしまうのを抑制でき、各太陽電池から効率的に発電電力を得ることができる。つまり、全体として発電電力を有効に取り出すことができる。 Therefore, according to the photovoltaic power generation system of the present invention , solar cells having equivalent power generation characteristics are grouped together and maximum power point tracking control is performed for each group. Even if there is variation, the maximum power point tracking control can prevent each solar cell from being affected by the power generation characteristics of other solar cells other than itself, and the generation output can be suppressed. Generated power can be obtained. That is, the generated power can be effectively taken out as a whole.

ここで、発電特性が同等であるか否かの判断基準（延いてはグループ分けの基準）である同等特性分類基準の具体例は種々考えられ、例えば下記のような各種分類基準が挙げられる。 Here, various specific examples of the equivalent characteristic classification standard, which is a criterion for determining whether or not the power generation characteristics are equivalent (as a result, a grouping standard) are conceivable, for example, various classification standards as described below .

まず、太陽光発電システムにおける同等特性分類基準として、少なくとも、太陽電池にて受光される太陽光の波長に対する発電電力の特性である波長−電力特性が所定の同等特性範囲内にあるか否かに基づいて分類可能な波長−電力特性分類基準が挙げられる。この場合、複数のグループのうち少なくとも２つは、それぞれ、波長−電力特性分類基準により分類された、波長−電力特性が同等特性範囲内にある太陽電池によって構成されていると共に、これら各グループに対応した同等特性範囲はそれぞれグループ毎に異なるように構成されている。 First, as your Keru equivalent characteristics classification criteria to solar power systems, at least a wavelength which is characteristic of the generated power with respect to the wavelength of the sunlight received by the light photovoltaic - or power characteristic is within a predetermined equivalent range of properties not Wavelength-power characteristic classification criteria that can be classified based on In this case , at least two of the plurality of groups are configured by solar cells that are classified according to the wavelength-power characteristic classification criteria, and the wavelength-power characteristics are within the equivalent characteristic range, and Corresponding equivalent characteristic ranges are configured to be different for each group.

また、太陽光発電システムにおける同等特性分類基準として、少なくとも、太陽電池が設置される場所の地面に対するその太陽電池の受光面の角度である傾斜角が所定の同等傾斜角範囲内にあるか否かに基づいて分類可能な傾斜角分類基準が挙げられる。この場合、複数のグループのうち少なくとも２つは、それぞれ、傾斜角分類基準により分類された、傾斜角が同等傾斜角範囲内にある太陽電池によって構成されていると共に、これら各グループに対応した同等傾斜角範囲はそれぞれグループ毎に異なるように構成されている。 Also, as your Keru equivalent characteristics classification criteria to solar power systems, at least, whether the tilt angle is an angle of the light receiving surface of the solar cell with respect to the ground where the solar cell is installed is within a predetermined equal inclination angle range An inclination angle classification criterion that can be classified based on whether or not is included . In this case , at least two of the plurality of groups are configured by solar cells that are classified according to the inclination angle classification criteria and have an inclination angle within the equivalent inclination angle range, and equivalents corresponding to these groups. The inclination angle range is configured to be different for each group.

また、太陽光発電システムにおける同等特性分類基準として、少なくとも、太陽電池の受光面の法線方向が示す方位角が所定の同等方位角範囲内にあるか否かに基づいて分類可能な方位角分類基準が挙げられる。この場合、複数のグループのうち少なくとも２つは、それぞれ、方位角分類基準により分類された、方位角が同等方位角範囲内にある太陽電池によって構成されていると共に、これら各グループに対応した同等方位角範囲はそれぞれグループ毎に異なるように構成されている。 Also, as your Keru equivalent characteristics classification criteria to solar power systems, at least, classifiable orientation based on whether the azimuth angle indicated by the normal direction of the light receiving surface of the solar cell is within a predetermined equal azimuth angle range corner classification criteria, and the like. In this case , at least two of the plurality of groups are constituted by solar cells classified according to the azimuth angle classification standard and having an azimuth angle in the equivalent azimuth angle range, and equivalents corresponding to these groups. The azimuth range is configured to be different for each group.

また、太陽光発電システムにおける同等特性分類基準として、少なくとも、太陽電池の発電電力を電力変換装置に入力するためにその太陽電池と電力変換装置の間に配線された電線の配線距離が所定の同等配線距離範囲内にあるか否かに基づいて分類可能な配線距離分類基準が挙げられる。この場合、複数のグループのうち少なくとも２つは、それぞれ、配線距離分類基準により分類された、配線距離が同等配線距離範囲内にある太陽電池によって構成されていると共に、これら各グループに対応した同等配線距離範囲はそれぞれグループ毎に異なるように構成されている。 Also, as your Keru equivalent characteristics classification criteria to solar power systems, at least the wiring distance of the wiring electric wires between the solar cell and the power conversion device to input the generated power of the solar battery to the power converter a predetermined Wiring distance classification criteria that can be classified based on whether they are within the same wiring distance range. In this case , at least two of the plurality of groups are configured by solar cells that are classified according to the wiring distance classification standard and whose wiring distance is within the equivalent wiring distance range, and equivalents corresponding to these groups. The wiring distance range is configured to be different for each group.

電力変換装置は、グループ毎に設けられた直流電圧変換手段を備えるようにしてもよい。この直流電圧変換手段は、対応するグループを構成する各太陽電池からの発電電力が合成されて入力されると共に、その入力された直流電圧を異なる値の直流電圧に変換する。また、各最大電力点追従制御手段は、それぞれ、同じグループに対応した各直流電圧変換手段に備えられている。そして、直交変換手段は、各直流電圧変換手段により直流電圧が変換されて出力された直流電力を交流電力に変換する。 Power conversion device may be so that with a DC voltage converter means provided for each group. This DC voltage conversion means combines and inputs the generated power from the solar cells constituting the corresponding group, and converts the input DC voltage into a DC voltage of a different value. Each maximum power point tracking control means is provided in each DC voltage conversion means corresponding to the same group. Then, the orthogonal transform means converts the DC power that is output by converting the DC voltage by each DC voltage conversion means into AC power.

また、上述した本発明の太陽光発電システムは、更に、直交変換手段からの交流電力が、そのままの電圧で、または所定の交流電圧に変圧されて、交流系統に連系されるよう構成してもよい。このようにすれば、発電効率の高い系統連系太陽光発電システムを構築することができる。 Moreover, solar power generation system of the present invention described above, further, the AC power from the Cartesian conversion means is transformed to intact voltage or predetermined AC voltage, and configured to be interconnection to AC system May be. In this way, a grid-connected solar power generation system with high power generation efficiency can be constructed.

Claims

A plurality comprising a solar cell for more power to dc power to the sun light,
Comprising a power converter for converting dc power that is generated by each of the plurality of solar cells into AC power,
The plurality of solar cells are grouped into a plurality of groups,
Each of the groups is configured by connecting in parallel one or a plurality of the solar cells whose power generation characteristics are recognized to be equivalent based on a predetermined equivalent characteristic classification standard,
The power converter is
Maximum provided for each said group, the DC power of the corresponding group or colleagues is entered, controls the operating point of the solar cells DC power input of that constitute the groups so that the maximum value Power point tracking control means;
Input from each of said groups, the DC power control by the maximum power point tracking means is inputted is made to the corresponding, the orthogonal conversion means for converting the AC power,
A photovoltaic power generation system characterized by comprising:

The photovoltaic power generation system according to claim 1,
As the equivalent property classification standard, wavelength is a characteristic of the generated power with respect to the wavelength of the sunlight which is received light - grouping as power characteristics belong to the group the solar cell to each other the same within a predetermined equivalent range of properties for wavelength - photovoltaic power generation system characterized by chromatic power characteristic classification criteria.

The photovoltaic power generation system according to claim 1 or 2,
The same as the characteristic classification criteria, before Symbol the solar cell The solar cell to each other the same said group tilt angle is the angle of the light receiving surface is within a predetermined equal inclination angle range relative to the ground of where the solar cell is installed photovoltaic system characterized for grouping to belong, to have a tilt angle classification criteria.

The solar power generation system according to any one of claims 1 to 3,
As the equivalent property classification standard, prior Symbol of the light receiving surface of the solar cell azimuth indicated normal direction the solar cell to each other within a predetermined equal azimuth range identical to belong to group such that the group solar systems characterized by chromatic azimuth classification criteria.

The solar power generation system according to any one of claims 1 to 4,
As the equivalent property classification standard, prior Symbol equivalent wiring distance range wiring distance of wired wire of predetermined during the solar cell and the power conversion device for a solar cell to enter a DC power generated in the power converter the solar cell to each other for grouping to belong to the same said group, photovoltaic power generation system characterized by have a wiring distance classification criteria are within.

The solar power generation system according to any one of claims 1 to 5,
The power converter includes a DC voltage converter provided al the in each group,
Each of the DC voltage conversion means receives DC power from a corresponding group, converts the DC voltage of the input DC power into a DC voltage of a value different from the input value,
Each said maximum power point tracking means for each of the groups is provided in the DC voltage converting means provided in the same said group,
The orthogonal transforming means converts the DC power output by converting the DC voltage by each of the DC voltage converting means into AC power.