安科(kē)瑞  陳聰(cōng) 周潔

1.項(xiàng)目背景Background

  隨著(zhuó)光(guāng)伏行(háng)業的發展(zhǎn)，部(bù)分地區村(cūn)級變(biàn)壓器及工業用電變(biàn)壓器容(róng)量與光(guāng)伏項目的裝(zhuāng)機容量處(chǔ)於(yú)飽和(hé)。電網公(gōng)司(sī)要求對後建(jiàn)的光伏並(bìng)網係(xì)統為不(bù)可逆(nì)流(liú)發電(diàn)係(xì)統，指光伏並網(wǎng)係統(tǒng)所發生(shēng)的電(diàn)由本(běn)地負(fù)載(zǎi)消耗(hào)，多餘的(dí)電(diàn)不允許(xǔ)通過低(dī)壓配電(diàn)變壓(yā)器(qì)向(xiàng)上級電網逆向送電。

  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.

  光伏逆變(biàn)器(qì)在將光(guāng)伏(fú)組(zǔ)件(jiàn)產生的(dí)直(zhí)流電(diàn)變換為交流(liú)電時(shí)，會(huì)夾雜(zá)有直流分量(liáng)和(hé)諧波(bō)，三相電(diàn)流不(bù)平(píng)衡，輸(shū)出功(gōng)率(shuài)不確(què)定性(xìng)等(děng)，目前基(jī)本(běn)沒(méi)有采取治理手(shǒu)段，因此(cǐ)，當有發電(diàn)功(gōng)率送(sòng)往(wǎng)公(gōng)用電網時，就會(huì)對電網產生諧(xié)波汙染，易(yì)造成(chéng)電網(wǎng)電壓波動(dòng)，閃(shǎn)變(biàn)等，如果有(yǒu)許多這(zhè)樣的(dí)發(fā)電(diàn)源向電(diàn)網輸電時(shí)，會導致(zhì)電(diàn)網電能(néng)質量(liáng)嚴重下降(jiàng)。所(suǒ)以這(zhè)類(lèi)光(guāng)伏發(fā)電係統須配(pèi)套(tào)加裝(zhuāng)防(fáng)逆(nì)流設施，來(lái)防止逆功率的發生。

  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)量大於負載需求(qiú)電量時，會(huì)產生逆功率。因(yīn)此，我們(mén)需(xū)要儀表(biǎo)來(lái)判(pàn)定(dìng)。逆變(biàn)器有過(guò)功率(shuài)輸(shū)出，再由儀表(biǎo)通(tōng)過(guò)RS485通訊(xùn)發(fā)出信(xìn)號和逆變(biàn)器(qì)數(shù)據交互(hù)，調(tiáo)節(jié)逆變器(qì)輸(shū)出(chū)功(gōng)率，使其輸出功率和用(yòng)電(diàn)功(gōng)率平衡。

  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.項目概述(shù)Project Overview

  菲律(lǜ)賓一家做光伏發電(diàn)的(dí)公司(sī)，聯係到我(wǒ)司，尋(xún)找防逆(nì)流電表  ， 對(duì)接(jiē)協(xié)議(yì)合適後， 采購(gòu)我(wǒ)司(sī)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(nì)流檢測(cè)儀表(biǎo)Anti-backflow detection meter

  當(dāng)光伏發電量(liáng)大於負載需求(qiú)電量(liáng)時，會產(chǎn)生逆(nì)功(gōng)率。因此，我(wǒ)們需(xū)要儀表來判(pàn)定(dìng)逆變器有過功(gōng)率(shuài)輸(shū)出(chū)，再由儀表通(tōng)過(guò)RS485通訊發(fā)出信(xìn)號和(hé)逆(nì)變(biàn)器(qì)數據交互，調節逆變(biàn)器輸(shū)出功率(shuài)，使其輸出(chū)功率和用電功率(shuài)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Function

  5.接綫Wiring

  6.典(diǎn)型鏈接(jiē) Typical Connection

  參考(kǎo)文(wén)獻 Bibliography

  1.Solutions for enterprise micro-grid system