Glossary entry (derived from question below)
Sep 30, 2016 07:55
7 yrs ago
English term
Australia
DC:AC ratio
English to Japanese
Science
Energy / Power Generation
Photovoltaic Power Generation
Recent trends in the PV industry have been towards an increasing DC:AC ratio,
where the AC conversion capacity attached to a PV system is significantly
smaller than the nameplate DC value. As the cost of the DC components
continues to decrease, and the need to reduce grid disturbances due to
the intermittent behavior of conventional PV systems, this trend will likely
accelerate even further. For this trend to continue significantly beyond the
DC:AC ratios of 1.4 being used today however, several hardware limitations
on conventional systems will have to be resolved. This paper describes a cost
competitive, and highly redundant electrical topology where these hardware
limitations have been eliminated.
where the AC conversion capacity attached to a PV system is significantly
smaller than the nameplate DC value. As the cost of the DC components
continues to decrease, and the need to reduce grid disturbances due to
the intermittent behavior of conventional PV systems, this trend will likely
accelerate even further. For this trend to continue significantly beyond the
DC:AC ratios of 1.4 being used today however, several hardware limitations
on conventional systems will have to be resolved. This paper describes a cost
competitive, and highly redundant electrical topology where these hardware
limitations have been eliminated.
Proposed translations
(Japanese)
| 4 +2 | 過積載率・積み増し比率 |
komazawa
|
| 3 | 直流から交流への変換率 |
cinefil
|
References
| 太陽光発電の過積載（積み増し） |
multiverse
|
Change log
Oct 2, 2016 20:12: komazawa Created KOG entry
Proposed translations
+2
1 hr
Selected
過積載率・積み増し比率
ソーラーパネルは直流(DC)を発生し、それを電力網（交流=AC）に送出するためにパワコン(power conditioner)が使われます。現在、各機器のコスト構成上、パワコンが変換できるすべての電力にジャストフィットしたパネルを組み合わせるより、少し大きめのパネルを組み合わせたほうが経済効率が良いことが判り、パワコンの能力を超えるパネルを取り付けることを過積載と呼ぶようになったようです。DC:AC ratioは、この能力の組み合わせを比率で示したものです。検索ワード「太陽光 積み増し比率」「過積載率」。経済産業省の資料では、「パネル対パワーコンディショナーの容量の比率」という解かりやすい表記が多用されています。一方で、専門の電気屋さんたちのサイトでは「過積載率」「積み増し率」が使われています。原文のNameplate DC value は太陽電池の銘板の値で、定格発電電力とか最大発電電力といった意味にとれます。DC componentsとは概して太陽電池のことでしょう。
Example sentence:
パワコン 10KW に パネル 12KW を接続 → 過積載率120% (1.2倍)
4 KudoZ points awarded for this answer.
Comment: "ありがとうございました。大変参考になりました。"
7 mins
直流から交流への変換率
ソーラー発電の問題の一つはソーラーパネルで発電した直流電流を商用の交流電流に変換するさいの効率の低さです。
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Note added at 4時間 (2016-09-30 11:59:28 GMT)
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http://www.jbits.co.jp/materials/photovoltaic_1.html
http://blog.rokutech.jp/article/120807283.html
http://www.solaredge.com/sites/default/files/inverter_dc_ove...
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Note added at 4時間 (2016-09-30 11:59:28 GMT)
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http://www.jbits.co.jp/materials/photovoltaic_1.html
http://blog.rokutech.jp/article/120807283.html
http://www.solaredge.com/sites/default/files/inverter_dc_ove...
Note from asker:
| ありがとうございました。 |
Peer comment(s):
| agree |
Mari Hata
: 直流交流電力変換効率としてもいいと思います。
5 hrs
|
|
ありがとうございます。
|
|
| disagree |
multiverse
: DC/AC変換効率は今や100%に近いところまで来ています。
See my reference comments.
12 hrs
|
|
だから？訳もだめ？どんな条件でも？いちゃもんもいいけど訳語の提案は？
|
Reference comments
12 hrs
Reference:
太陽光発電の過積載（積み増し）
2015年に建設された電力事業用太陽光
発電所の大半において、DC/AC比率（太陽電池パネルの積み増し比率）は、1.2～1.4となっている。
http://www.nedo.go.jp/content/100785821.pdf
太陽光発電の過積載（積み増し）とは
太陽光発電のメガソーラープロジェクトなどで、「過積載（積み増し）」という手法が使われる事があります。これは簡単に言うと、パワーコンディショナー(AC)の容量に対して、ソーラーパネル(DC)の容量を大きくすることを指します。
http://standard-project.net/solar/words/kasekisai.html
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Note added at 16時間 (2016-09-30 23:57:07 GMT)
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The DC to AC ratio (also known as the Inverter Load Ratio, or “ILR”) is an important parameter when designing a solar project. For example, a 6-kW DC array combined with a 5-kW AC rated inverter would have a DC/AC ratio of 1.2 (6 kW / 5 kW = 1.2).
http://www.solarpowerworldonline.com/2016/07/solar-inverters...
The recent trend of reduced costs of PV modules compared to the cost of inverters has introduced the concept of oversizing the PV array as a cost-effective method for increasing system output. The metric used to measure oversizing is known as the DC-AC ratio, array-to-inverter ratio, or simply the oversizing-ratio. For example a 3kW inverter with an oversizing ratio of '2' will use a 6kWp array.
http://www.theaustralian.com.au/business/business-spectator/...
PV system designers and developers are tasked with the important decision of selecting the optimal Array-to-Inverter ratio for each inverter in a given project. The Array-to-Inverter ratio defines the relationship between the array’s nameplate power rating at Standard Test Conditions (cell temp of 25ᵒC, irradiance of 1000W/m2, and Air-Mass 1.5) to the inverter’s rated AC output power. As an example, a system with a 120kWdc array feeding a 100kWac inverter has an Array-to-Inverter Ratio of 1.2. The Array-to-Inverter Ratio is known by several names in the solar industry, including Oversizing Ratio, Overloading Ratio, and DC-AC Ratio. Until recent years, due to the high cost of modules, PV systems were designed with the aim of maximizing energy production per PV module. This approach typically resulted in oversizing ratios between 1.10 to 1.25 depending on the project location and design specific DC loss factors such as tilt angle, orientation, mounting method, DC wiring losses, mismatch, and soiling. With falling module prices, project financials have changed in favor of higher Array-to-Inverter ratios. The purpose of this article is to explain why systems are being oversized, the technical considerations relating to oversizing, and the impact of oversizing on the life of the inverter.
http://www.solarpowerworldonline.com/2013/06/supersize-it-ov...
発電所の大半において、DC/AC比率（太陽電池パネルの積み増し比率）は、1.2～1.4となっている。
http://www.nedo.go.jp/content/100785821.pdf
太陽光発電の過積載（積み増し）とは
太陽光発電のメガソーラープロジェクトなどで、「過積載（積み増し）」という手法が使われる事があります。これは簡単に言うと、パワーコンディショナー(AC)の容量に対して、ソーラーパネル(DC)の容量を大きくすることを指します。
http://standard-project.net/solar/words/kasekisai.html
--------------------------------------------------
Note added at 16時間 (2016-09-30 23:57:07 GMT)
--------------------------------------------------
The DC to AC ratio (also known as the Inverter Load Ratio, or “ILR”) is an important parameter when designing a solar project. For example, a 6-kW DC array combined with a 5-kW AC rated inverter would have a DC/AC ratio of 1.2 (6 kW / 5 kW = 1.2).
http://www.solarpowerworldonline.com/2016/07/solar-inverters...
The recent trend of reduced costs of PV modules compared to the cost of inverters has introduced the concept of oversizing the PV array as a cost-effective method for increasing system output. The metric used to measure oversizing is known as the DC-AC ratio, array-to-inverter ratio, or simply the oversizing-ratio. For example a 3kW inverter with an oversizing ratio of '2' will use a 6kWp array.
http://www.theaustralian.com.au/business/business-spectator/...
PV system designers and developers are tasked with the important decision of selecting the optimal Array-to-Inverter ratio for each inverter in a given project. The Array-to-Inverter ratio defines the relationship between the array’s nameplate power rating at Standard Test Conditions (cell temp of 25ᵒC, irradiance of 1000W/m2, and Air-Mass 1.5) to the inverter’s rated AC output power. As an example, a system with a 120kWdc array feeding a 100kWac inverter has an Array-to-Inverter Ratio of 1.2. The Array-to-Inverter Ratio is known by several names in the solar industry, including Oversizing Ratio, Overloading Ratio, and DC-AC Ratio. Until recent years, due to the high cost of modules, PV systems were designed with the aim of maximizing energy production per PV module. This approach typically resulted in oversizing ratios between 1.10 to 1.25 depending on the project location and design specific DC loss factors such as tilt angle, orientation, mounting method, DC wiring losses, mismatch, and soiling. With falling module prices, project financials have changed in favor of higher Array-to-Inverter ratios. The purpose of this article is to explain why systems are being oversized, the technical considerations relating to oversizing, and the impact of oversizing on the life of the inverter.
http://www.solarpowerworldonline.com/2013/06/supersize-it-ov...
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