安科瑞 陳聰

Acrel anti-backflow meter apply in the Philippines photovoltaic project 

1.項(xiàng)目背景Background

隨(suí)著光伏行業的發展，部分(fēn)地區(qū)村(cūn)級(jí)變壓(yā)器及(jí)工業用(yòng)電(diàn)變壓器(qì)容(róng)量與光伏項目的裝機容(róng)量處(chǔ)於飽(bǎo)和
。電網公司要(yào)求對(duì)後建(jiàn)的(dí)光(guāng)伏並網係(xì)統為不(bù)可逆(nì)流發(fā)電(diàn)係(xì)統，指光伏(fú)並(bìng)網(wǎng)係(xì)統所(suǒ)發(fā)生的(dí)電(diàn)由本(běn)地負(fù)載(zǎi)消耗，多(duō)餘的電(diàn)不允許(xǔ)通(tōng)過低壓配電變(biàn)壓器(qì)向上級電網逆(nì)向(xiàng)送電(diàn)
。

With the development of photovoltaic industry, the capacity of village-level transformers and industrial power transformers and the installed capacity of photovoltaic projects are saturated in some areas.The power grid company requires the photovoltaic grid-connected system to be a non-backflow current generation system, which means that the electricity generated by the photovoltaic grid-connected system is consumed by the local load, and the excess electricity is not allowed to be sent to the upper power grid through the low-voltage distribution transformer in reverse direction.

光(guāng)伏(fú)逆(nì)變(biàn)器在將光(guāng)伏(fú)組件產(chǎn)生(shēng)的直(zhí)流電變換交流(liú)電時(shí)，會(huì)夾雜有直(zhí)流分(fēn)量(liáng)和諧波(bō)，三相(xiāng)電流不(bù)平(píng)衡(héng)，輸(shū)出(chū)功率(shuài)不確定性等，目前(qián)基(jī)本沒有采(cǎi)取合(hé)理(lǐ)的(dí)治理(lǐ)手段，因(yīn)此，當有(yǒu)發電(diàn)功(gōng)率送往(wǎng)公(gōng)用(yòng)電網時，就會對(duì)電網產生(shēng)諧(xié)波汙染，易(yì)造(zào)成(chéng)電網(wǎng)電(diàn)壓(yā)波動(dòng)，閃變等(děng)，如果有許多這(zhè)樣的發電源(yuán)向電網(wǎng)輸(shū)電時(shí)，會(huì)導致電網(wǎng)電能(néng)質量嚴重(zhòng)下降
。所以(yǐ)這類光伏發電係(xì)統須配(pèi)套加裝防逆(nì)流設施，來防(fáng)止逆(nì)功率(shuài)的(dí)發生(shēng)
。

Photovoltaic inverter in photovoltaic components will produce direct current into alternating current (ac), has the dc component and harmonic mixing, unbalanced three phase current, output power of uncertainty, such as the current basic didn't take effective management measures, therefore, when there is power to the utility grid, will generate harmonic pollution to power network, easy cause power grid voltage fluctuation and flicker, etc.,If there are many such power sources to transmit electricity to the grid, the power quality of the grid will be seriously degraded.Therefore, this kind of photovoltaic power generation system must be equipped with anti-backflow current facilities to prevent the occurrence of reverse power.

當光伏(fú)發電(diàn)量(liáng)大於負(fù)載(zǎi)需(xū)求(qiú)電量時(shí)，會(huì)產生(shēng)逆(nì)功(gōng)率
。因(yīn)此(cǐ)，我(wǒ)們需(xū)要(yào)儀(yí)表(biǎo)來(lái)判(pàn)定(dìng)
。逆(nì)變(biàn)器有(yǒu)過功率輸出(chū)，再由(yóu)儀表(biǎo)通(tōng)過(guò)RS485通訊發(fā)出(chū)信號和(hé)逆變器數據交互(hù)，調(tiáo)節(jié)逆變(biàn)器輸(shū)出(chū)功率(shuài)，使其輸出功率和(hé)用(yòng)電(diàn)功(gōng)率(shuài)平(píng)衡
。

When the photovoltaic power generation is greater than the load demand, the inverse power will be generated.So we need instruments to determine that Inverter has power output, and then by the instrument through RS485 communication signal and inverter data interaction, adjust the inverter output power, so that its output power and power balance.

2.項目概(gài)述Project Overview

菲律賓(bīn)一家(jiā)做(zuò)光伏發電(diàn)的公司，聯(lián)係到(dào)我司(sī)，尋找(zhǎo)防(fáng)逆流(liú)電(diàn)表  ， 對(duì)接協議(yì)合適後(hòu)， 采購(gòu)我司的ACR10R-D16TE.

A photovoltaic power generation company in the Philippines contacted our company to look for anti-backflow current meters. After proper connection agreement, we will purchase ACR10R-D16TE from our company.

 3.防(fáng)逆流(liú)檢測儀表(biǎo)Anti-backflow detection meter

當光伏發電量(liáng)大於負(fù)載(zǎi)需求(qiú)電(diàn)量時，會(huì)產(chǎn)生逆功(gōng)率
。因(yīn)此，我(wǒ)們需要儀(yí)表來判定(dìng)逆變器(qì)有(yǒu)過功率(shuài)輸(shū)出，再(zài)由儀(yí)表(biǎo)通(tōng)過(guò)RS485通(tōng)訊發出(chū)信號和逆變器數(shù)據(jù)交互，調節(jié)逆變器輸(shū)出(chū)功率，使其輸出功率和用電功率平衡(héng)
。

When the photovoltaic power generation is greater than the load demand, reverse power will be generated. Therefore, we need an meter to determine that the inverter has over-power output, and then the meter sends a signal through RS485 communication to interact with the inverter data to adjust the output power of the inverter to balance the output power and the electrical power.

4.功(gōng)能(néng)Function

5.接(jiē)綫(xiàn)Wiring

6.典型(xíng)鏈接 Typical Connection

參考(kǎo)文獻(xiàn) Bibliography

1.Solutions for enterprise micro-grid system