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  8. 專業從事電力電源智能模塊的研發、生產以及銷售,有任何需求或疑問可以撥打右方熱線咨詢
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    當前位置:主頁 > 新聞資訊 > 直流屏應用在廣播傳媒領域中的重要性
    直流屏應用在廣播傳媒領域中的重要性
    時間:2021-04-28 10:54:36 點擊次數:3934

    本文主要對于直流屏在廣播傳媒供配電系統中的重要性進行分析,并直流屏日常安穩而進行的檢修維護方法做簡要總結。

    廣播傳媒系統在過程中,對信號傳輸的繼續性要求很高,自然相應的也給供配電系統輸電質量及穩定性提出極高要求。受復雜因素的影響,以往廣電工作中常出現的斷電而引發傳播中止問題,因此必須在夜間時才能進行故障排查但是隨著直流屏的應用,供電就算發生了以上問題仍可對廣播傳媒系統進行正常供電,確保信號傳輸活動持續性。

     

    1直流屏在廣播傳媒供配電系統中的重要性

    1.1直流屏結構特點

    常規直流屏由交流配電模塊、充電模塊、配電監控模塊、降壓硅鏈等零件構成。如圖1為典型的直流屏結構系統

     

    1直流屏的結構系統

    其間,交流配電模塊從低壓配電柜處接入市電,使用雙電源自動切換開關完結主、備用電源之間的切換后向充電模塊供給交流電。廣播傳媒供配電系統直流屏中的充電模塊一般由多個充電模塊并聯組成,通過降壓、整流,將220V市電轉化成系統預設幅值的直流電壓,具體幅值可根據供配電系統特色靈敏選擇。

    配電監控模塊的構成相對復雜些,由監控單元或監控電路構成,在系統內添加監控模塊,可實時收集母線系統絕緣性以及電池溫度、電壓、電流等信號,了解直流屏的運轉狀況[1]。監控單元作為該模塊首要中心,收集到的悉數信號均需于此完結處理核算及剖析,結合剖析成果得出指令反應,便利對系統運轉狀況參數做針對的調整。此外監控模塊還供給人機的交互功用,合作液晶觸摸屏,辦理人員可直接展開信息調取或參數設置。

     

    降壓硅鏈的首要作用為操控母線系統鏈路電壓。

    1.2直流屏運轉原理

    直流屏運轉進程簡化為充放電的循環。當蓄電池電量充足時處于浮充狀況,由充電模塊向開關柜操控母線系統跟合閘母線系統等設備供給小電流。若產生斷電現象,封閉充電模塊,由蓄電池向負載供給電能,確保斷電后,高壓開關柜等設備仍可正常運轉一段時間,為毛病掃除爭取最大的時間差,防止出現傳播信號中止的情況。當電路康復正常充電模塊則重新啟動,向母線系統等設備持續供給小電流,并對蓄電池充電,充溢后切換成浮充狀況。

    因電網供電中止或供配電系統毛病而產生斷電后,直流屏仍可供給安穩的電源,并將有關毛病信息傳輸至中央操控中心,并進行聲光報警,提示辦理人員第一時間重視毛病信息以便在最短時間內進行毛病檢修,康復系統的正常供電。

     

    1.3直流屏作用優勢

    以某省的電臺供配電系統為例,對直流屏在廣播傳媒供配電系統中的作用優勢為說明。直流屏為智能免保護直流電源屏的簡稱,在許多大型變電所中均有裝置,如該省級的電臺發信系統機房的10kV配電室裝有直流屏。高壓開關柜直接或高壓電網相接,這一電壓無法滿足開關柜合閘母線系統、操控母線系統等元件的供電需求,此外若產生電路突發中止問題,充沛康復需要倒閘,而使用直流屏作為高壓配電室各類設備的直流供電電源,以上問題均能有用解決。

     

    該省級的電臺現在具有多檔日子、新聞、休閑類廣播節目,為應對融媒體給傳統廣播電臺展開帶來的沖擊,電臺高度重視節目的創新質量提高作業。隨著電臺轉型展開的深化,其通信傳輸系統對供配電系統運轉安穩性、持續性提出極高要求。現在該廣播電臺發信系統內,裝置許多不同類型的發射機,一起配備制冷、通信等其他輔助性設備,對高壓電的需求量高。為確保供電連續性提高電臺節目輸出質量,該電臺供電室的高壓開關柜裝置數字化直流屏作為直流電源,除高壓開關柜外電臺配電室中央信號屏也由直流屏供給直流電源,并供給電源的辦理、保護、反常預警等功用。其間電池辦理結合電臺運轉需求,規范調節均浮充轉換參數,對電源的充電電流、溫度等進行調節。電池保護功用首要是能參考到直流屏的電池毛病率高,對充電電池做均充保護,從而降低毛病產生概率,延伸電池壽數。反常預警功用用于分流器斷線、母線系統欠壓、交流欠壓等現象進行預警提示。

     

    總體來說,直流屏在廣播傳媒供配電系統中的使用大大提高了供配電系統的供電安穩性便利展開系統的辦理活動最大極限削減斷電毛病,確保單位各項信息傳播活動順利展開。

     

    2供配電系統中直流屏的保護方法

    在了解直流屏在廣播傳媒供配電系統中的組成特色、運轉原理及作用優勢后,需結合以上信息,擬定專門的直流屏檢修保護方案,通過日常保護,盡可能削減直流屏毛病。

    結合以往直流屏保護經驗,其毛病多發于主接線、蓄電池、充電模塊以及監控模塊上。

    主接線毛病掃除需要定時查看直流屏各零件開關、接線、接觸器的運轉狀況,對產生毛病、損壞或老化的零件予以替換。

    蓄電池毛病。蓄電池毛病需要分別在充電或非充電狀況下查看電池標稱及浮充電壓是否在規范水平,一般情況下蓄電池的使用壽數為5年,若為蓄電池毛病,需進行替換;若為操控回路毛病,可根據廣播傳媒供配電系統運轉規則,進行直流系統斷電檢修;若為整流模塊毛病,可在線替換三路整流模塊進行一起供電,然后將毛病回路的整流模塊撤除。

     

    充電模塊及監控模塊毛病。充電模塊及監控模塊檢修首先應切斷電池組,然后查看兩模塊的運轉情況,若存在反常可進行替換。若充電模塊出現高溫報警,可將機柜門開啟進行通風降溫,待溫度降低至規范水平后,按下復位開關。

    定論:直流屏在確保廣播傳媒供配電系統運轉安穩方面發揮出重要作用,在直流屏系統運維辦理中,相關人員需對其運轉原理或毛病特色有充足的了解,定時展開直流屏系統元件檢測作業,及時替換老舊零件,以確保直流屏的高質量運轉。一起活躍開發直流屏的信息化監管技術,對其運轉狀況做實時監測,促進廣電行業健康展開。

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