霍爾效應(yīng)傳感為智能電網(wǎng)提供電流測量

　　智能電網(wǎng)的高效運(yùn)行依賴于在高分辨率測量電流水平和其他參數(shù)的能力。智能電網(wǎng)應(yīng)用的另一個關(guān)鍵特征是增加了小型可再生能源的使用。這些系統(tǒng)要求使用逆變器轉(zhuǎn)換的太陽能或風(fēng)源捕獲的電力與電網(wǎng)分布兼容的交流信號。在控制回路中需要電流傳感器以確保滿足這些條件。本文著眼于霍爾效應(yīng)電流傳感技術(shù)，以及它如何可以應(yīng)用到智能電網(wǎng)。

　　智能電網(wǎng)依賴于精確的實(shí)時數(shù)據(jù)，以確保設(shè)備，控制電力輸送，并與電網(wǎng)接口，保持在峰值效率運(yùn)行。網(wǎng)格上的傳感器捕獲的數(shù)據(jù)可以發(fā)現(xiàn)潛在的故障點(diǎn)形成和提醒運(yùn)營商的問題或激活功能，可以執(zhí)行補(bǔ)救行動。這是導(dǎo)致電源分配單元（PDU）安裝執(zhí)行輸出功率的精確測量及其特點(diǎn)。

　　A key additional feature of smart-grid applications is the increased use of small-scale renewables. These systems demand the use of inverters to convert the electricity captured from solar or wind sources to an AC signal compatible with grid distribution. The AC must be synchronized to the grid and have low harmonic distortion but this can be challenging to achieve.

　　In the case of photovoltaics， an inverter is required to convert the DC generated by each of the cells to a suitable AC power output. Electrical current sensors are needed for the inverter’s control loop in order to ensure proper connection to the grid. The sensors must accurately measure both AC and DC currents and have good dynamic performances. Very fast response time is required to react quickly to any change in the grid and shut off or disconnect the system before damage occurs. A high output bandwidth enables the system to measure high frequency AC currents and harmonics in order to ensure that the delivered power meets the stringent targets for power quality imposed by the electricity suppliers.