Zhuang ZhengCity University of Hong Kong | CityU · Department of Architecture and Civil Engineering
Zhuang Zheng
Doctor of Engineering
About
17
Publications
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Publications
Publications (17)
Air conditioning systems are promising energy flexibility resources for smart grids. However, buildings with various thermodynamics must be coordinated to utilize limited energy flexibility effectively. This study proposes a distributed coordination strategy to coordinate building flexible thermal loads of different characteristics for optimized ut...
Residential-level peak shaving is beneficial for the supply–demand balance of buildings with a limited power capacity of renewable energy sources like building-integrated photovoltaics. Thermostatically controlled loads (TCLs) are recognized as flexible resources for peak shaving. In practice, most thermal appliances are controlled by local on–off...
High penetration of Photovoltaic (PV) to the distribution network may bring under-voltage and over-voltage issues, limiting the PV hosting capacity. Air conditioners (AC) in grid-interactive buildings can support voltage regulation by manipulating flexible energy consumption. This paper developed a novel voltage control strategy to regulate the AC...
Smart home energy management (SHEM) with residential photovoltaic (PV)-battery systems is a complicated issue with different facets. An integrated SHEM model covering the essential functions is missing. Meanwhile, residential PV-battery systems' optimal operations with renewable energy exchanges and imperfect forecasts are still open challenges. In...
The residential PV-battery system is becoming economically viable due to technological advances. Selecting optimum investment portfolios and operation strategies are still the challenges faced by homeowners. This study proposed an integrated stochastic sizing-operating framework for optimal design and operation of grid-connected residential photovo...
The building sector takes a large proportion of electricity consumption and carbon emission in high-density urban areas. To reduce the carbon emissions and use energy more efficiently in the building sector, home energy management system (HEMS) is proposed and used. In the HEMS, the prediction of electricity consumption in the short-term future is...
The growing interest in green building is driving the development of energy efficiency building models. One of the essential elements is an effective and efficient Energy Management system. Traditionally, the system contains lots of meters measuring each appliance. Non-Intrusive Load Monitoring (NILM) is a technique for estimating power consumption...
Buildings represent a large part of energy consumption and carbon emissions in high-density urban areas. Home energy management system (HEMS) is proposed to relieve this problem. Prediction of energy consumption in the short-term future serves as an intelligent tool to make decisions for controlling and optimizing the HEMS. In this paper, one resea...
Smart meters generate a massive volume of energy consumption data which can be analyzed to recover some interesting and beneficial information. Non-intrusive load monitoring (NILM) is one important application fostered by the mass deployment of smart meters. This paper presents a supervised event-based NILM approach for non-linear appliance activit...
Questions
Questions (2)
Hi, recently, I am doing power flow simulation research using detailed dynamic domestic profiles with pv panels. Only net real power, net apparent power, the solar real power and solar apparent power profiles are measured now. How can I conduct power flow simulation using these measured profiles? As I know, for static power flow simulations, both spot real power and reactive power are needed for simulation. Should I also use dynamic active power and reactive power profiles of domestic loads? Any ideas are welcomed~ Thank you so much!
Hi, I have a question about Grid tied PV systems. Suppose PV panels are used to support domestic loads with priority and it is allowed to export surplus electricity of PV panels to the grid. My question is: when PV exporting electricity to the grid, the Real power P is negative, but how about the sign or directions of reactive power Q, and the apparent power S? Besides, I am doing power flow simulation using load profiles containing PV profiles, but I am deeply confused with the direction of reactive power. (suppose net real and net apparent power, PV real power and apparent power are measured or known). Do you have any ideas about this simulation?
