智能電網中的能量傳感與管理
智能電網中的能量傳感與管理
本文討論了如何使用能量測量IC與當前傳感器一起提供智能電網實現中的單和三相設計的診斷和故障檢測、隔離和恢復。
智能儀表中使用的傳感器并不是特別具有挑戰性。檢測電壓和電流可以像線圈一樣簡單,但是從這些傳感器中傳遞有用的、復雜的數據是一個挑戰。現代智能電表需要一個廣泛的數據反饋到電網,或者到一個地方聚合或中央辦公室。
智能電表需要能夠確定活動的能量(千瓦時),視在功率(kVA),無功電能(千乏),均方根值,并與單和多相儀表、工業儀表精度最高的電能質量,并能監測中的應用。所有這些都需要多個通道來捕獲數據,而在過去,這些數據導致了大型、昂貴的計量系統。
通過集成傳感器接口和測量來捕獲和處理米表內的傳感器數據是目前開發這種系統的挑戰。
Multichannel current capture
The ADE7816 from Analog Devices is a highly accurate, multichannel metering device that is capable of measuring one voltage channel and up to six current channels. It measures line voltage and current and calculates active and reactive energy, as well as instantaneous RMS voltage and current. The device incorporates seven sigma-delta (Σ-Δ) ADCs with a high-accuracy energy measurement core. The six current input channels allow multiple loads to be measured simultaneously to capture the different measurements from a range of sensors, and determine the active, apparent, and reactive energy simultaneously at any point in time at the point of load. This data can then be fed back into the utility network to optimize the power delivery and create a safe and efficient feedback loop.
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