安(ān)科瑞(ruì) 鮑(bào)靜君

　　1.項(xiàng)目概(gài)述：Project Overview

　　一(yī)家(jiā)位(wèi)於尼日利亞(yà)新(xīn)能(néng)源(yuán)公(gōng)司，主要(yào)在非(fēi)洲(zhōu)從(cóng)事(shì)光伏發電項(xiàng)目(mù)。客戶要使(shǐ)用直流電表，用於(yú)光(guāng)伏(fú)係統(tǒng)中直流(liú)側(cè)的監測計量。本文(wén)介(jiè)紹了安科瑞(ruì)DJSF1352-RN直流電(diàn)表(biǎo)在尼日(rì)利(lì)亞(yà)小(xiǎo)型(xíng)光伏(fú)發(fā)電設施直流側的(dí)應(yīng)用(yòng)。主要用(yòng)於(yú)光伏(fú)係統中的電流的計(jì)量，通(tōng)過(guò)霍爾對電路係(xì)統進行(háng)計量(liáng)，通訊(xùn)和控製等。

　　The company is located in Nigeria and is a new energy company. Mainly engaged in photovoltaic power generation projects in Africa. The customer wants to use DC meters and hall sensors for monitor current and voltage at the DC side of photovoltaic system.This paper introduces the application of Acrel DJSF1352-RN DC energy meter in the DC side of a photovoltaic system in Nigeria. It is mainly used to measure the DC current in the photovoltaic system, and cooperate with hall current sensor to measure, communicate and control the circuit system.

　　2.DJSF1352-RN介紹 DJSF1352-RN DC Energy Meters

　　DJSF1352-RN導(dǎo)軌式(shì)直流電能表(biǎo)，主(zhǔ)要針(zhēn)對電信基站，直流(liú)充(chōng)電樁，太陽能光伏等(děng)應(yīng)用(yòng)場(cháng)合而設計，該係列(liè)儀(yí)表可(kě)測(cè)量直流(liú)係統中的電壓，電流，功(gōng)率(shuài)以及正(zhèng)反(fǎn)向(xiàng)電能等。在(zài)實際使用現場(cháng)，即(jí)可計量(liáng)總電(diàn)能，又可計量規定時(shí)間(jiān)段內的電(diàn)能。檢測(cè)的結果(guǒ)既(jì)可用(yòng)於(yú)本(běn)地顯(xiǎn)示(shì)，又(yòu)能與工控(kòng)設備，計算機連接，組(zǔ)成(chéng)測(cè)控係統(tǒng)。

　　DJSF1352型電子(zǐ)式直流電(diàn)能表采(cǎi)用液(yè)晶(jīng)顯示，具有(yǒu)RS485功(gōng)能可(kě)與微機進行(háng)數(shù)據交換(huàn)。產品由測量(liáng)單元，數(shù)據處理(lǐ)單元，通訊(xùn)單(dān)元，顯示單(dān)元等組(zǔ)成，具有(yǒu)電(diàn)能(néng)測量，數(shù)據(jù)處理，實時(shí)監(jiān)測等(děng)功能。

儀表可(kě)具(jù)有紅(hóng)外(wài)通訊(xùn)接(jiē)口和RS-485通(tōng)訊接(jiē)口(kǒu)，同(tóng)時支(zhī)持Modbus-RTU協議和(hé)DLT645-97(07)協議(yì)；可(kě)帶繼(jì)電器報警輸出和開關量輸入功(gōng)能(néng)；根據不同要求(qiú)，通過儀表麵(miàn)板按鍵，對變比(bǐ)，報警(jǐng)，通訊進(jìn)行(háng)設置；具(jù)有(yǒu)開關量(liáng)事件記錄（Modbus協議），編(biān)程和事(shì)件(jiàn)設(shè)置記錄（645協(xié)議），數據瞬(shùn)時(shí)和定(dìng)時(shí)凍結功能(néng)（645協議），電(diàn)壓電流功(gōng)率(shuài)值(zhí)記錄功(gōng)能(néng)。

　　DJSF1352-RN rail-mounted DC power meter designed for telecommunications base stations, DC charging piles, solar photovoltaic and other applications, this series of meters can measure the voltage, current, power and forward and reverse energy and so on in the DC system.The actual use of the site, you can measure the total power, but also measure the energy within a specified period of time. The test results can be used for local display, but also with industrial control equipment, computers to form a measurement and control system.

　　The meter can have infrared communication interface and RS-485 communication interface, and supports Modbus-RTU protocol and DLT645-97 (07) protocol at the same time.The meter can have relay alarm output and digital input function;You can set the ratio, alarm, and communication through the meter panel keys according to different requirements.The meter can have event recording of switch (Modbus protocol), programming and event setting records (645 protocol), instantaneous and timing freeze function of data (645 protocol), value recording function of voltage and current power.

　　3.型(xíng)號及(jí)功能介(jiè)紹 Type and Function Description

　　Note：when dual DC input（D）function is selected，if Hall current sensor input is used in

　　current channel,a power supply module shall be provided to supply power to the second Hall sensor;if D function is not provided,the built-in power supply of electric meter can be used.

　　4.開口式霍(huò)爾電(diàn)流(liú)傳感器Split Core Hall Current Transformer

　　5.客戶(hù)要求(qiú) Customer Requirement

　　客(kè)戶有一(yī)個(gè)太(tài)陽能混(hùn)合動力係(xì)統。PV板(bǎn)，電(diàn)池(chí)儲(chǔ)能與(yǔ)柴油發生(shēng)器電(diàn)信(xìn)站，三者(zhě)連接到(dào)同(tóng)一根(gēn)母綫。客(kè)戶(hù)想(xiǎng)用直(zhí)流儀(yí)表(biǎo)來監(jiān)測母(mǔ)綫(xiàn)的電流(liú)電壓(yā)。他們(mén)的(dí)太陽能係(xì)統是電信基站，輔助電(diàn)源是(shì)DC48V，電(diàn)流是(shì)DC100A。

　　The customer have a solar hybrid system. PV panel, battery storage and diesel generator for a telecom station，All the 3 systems are connected to a single bus bar. They wants to know the watt hour reading from the bus bar using a DC meter. And their solar site is a telecom site. the power supply voltage is DC 48V, the current is DC100A.