Subtopic 6: Laboratory and Field demonstration of MGs with PV Modules and Smart Storage

全港首個智慧型電氣負載控制器
First-of-its-kind Smart Demand Controller in Hong Kong

許昭教授，香港理工大學，電機工程學系
Prof. Zhao Xu, Department of Electrical Engineering, The Hong Kong Polytechnic University

維持頻率穩定是保障電力系統安全運行的關鍵因素。團隊成功研發本港首個能實時回應頻率變化的智慧型電氣負載控制器，可用在不同家居電器而體積細小（約一般信用卡大小），適合香港家居使用（圖四）。傳統上，電網的頻率調節只能由發電方承擔，當用戶數量多時，負荷相當大。此控制器讓電器即時參與頻率回應，在頻率過低時，切斷非重要負荷；在系統頻率恢復時，迅速恢復供電。此控制器能從用戶方層面，由家居電器分擔頻率平衡的負荷，對整個電網系統的穩定非常有利。冰箱、空調和熱水器等大型家居電器由於回應快速及可控性高，非常適合使用此控制器。智慧型電氣負載控制器的推廣將對香港電網的穩定運行有重要意義。

Ensuring frequency stability is the key factor for electricity system safety. The team successfully developed the first-of-its-kind real-time smart demand controller in Hong Kong, which is able to respond real-time to frequency variation.  The size of the smart demand controller is as small as a regular credit card size, which is very suitable for home use in Hong Kong (Fig 4).  Currently, the stabilization of frequency was provided by the generation side. When the number of users is high, the load is significant. The controller is able to let the home appliances contribute to the frequency response – Non-critical appliances were switched off when frequency is too low, and rapidly resumes power supply once the frequency restores.  The controller is able to share the load of frequency stabilization and thereby, fostering the operation of the entire microgrid system. Owing to their fast response rate and high controllability, large home appliances like refrigerators, air-conditioners and water heaters are very suitable candidates for applying this controller. The widespread application of this controller is considered of providing important contribution to the stable operation of microgrid system in Hong Kong.

智慧型電氣負載控制器體積細小（約一般信用卡大小），非常適合香港家居使用。
The size of the smart demand controller is as small as a regular credit card size, which is very suitable for home use in Hong Kong. 

智慧型電氣負載控制器之短片示範：
Video demo of Smart Demand Controller:

[Tudou link]

Project Leaflet 研究計劃簡介