Real-time Power Monitoring Research Articles

REAL-TIME POWER MEASUREMENTS IN SMART BUILDING MONITORING SYSTEM

The concept of a smart building or a home automation system is often characterized by the ability to control and monitor various household appliances to provide improved convenience, energy efficiency and security. In this paper a smart building real-time power monitoring system is proposed. The system targeted at enhanced safety and user awareness about power consumption with reduced cost. The consumed power can be instantaneously measured. The system can be programmed such in the case increasing power consumption, and start to turn off some insignificant appliances. Consequently, power consumption is reduced down and the cost is reduced. The general-purpose microcontroller (Arduino) available in market with low price. An interpolation technique is proposed to reduce the time of data acquisition. The experimental power load measurements achieved by proposed system are compared in the Lab with the precision and commercial power meters. The comparison shows good results, and the typical time required to measure the real power load and power factor is 42.8 ms for one cycle measurement with 192 samples of data acquisition. The maximum error in measurements are 6% W for real power and 4% for PF.

Millimeter Wave Power Monitoring in EAST ECRH System

This paper presents a stable millimeter-wave power monitoring system for ECRH on EAST tokamak. The real-time power monitoring was realized based on power monitor miter bends. The “Exchange” method was proposed to monitor the reflection power for RF protection. A cRIO-based signal process unit was designed, it is robust and has the response time of $1~\mu \text{s}$ . The power monitoring system was tested and the experimental results were discussed.

Switching Action Evaluation of a Net Metering Miniature System

Net Metering is an electricity policy wherein renewable power sources at home are integrated to the power utility. This paper aims to validate a net metering miniature setup with respect to its switching action and power monitoring scheme. It seeks to show the performance of the switching actions on the net metering miniature system considering that the different loading cases occur and at the same time evaluate the power monitoring scheme of the miniature system. The researchers formulated their own net metering miniature system design to model the actual commercial net meter system and test the validity of the setup by performing three cases for switching action while monitoring power data from the ac analyzer on real-time basis. The researchers designed three switching action cases to exactly evaluate the system. There are three different cases of this design implementation. Using Matlab and its xlswrite function, real-time power monitoring is executed while performing three different load cases. Upon performing three different load cases, data gathered proves the validity of the switching actions. During case shifting, there is a negligible delay of displaying power data in the GUI. This delay is due to communication from ac analyzer to Matlab GUI and is insignificant enough to invalidate the setup. Power consumption from the utility happens only when the loading system has greater power consumption compared to that of the generated capacity of the renewable source.

Smart Grid Technology for Efficient and Reliable Power System Operation and Control

Smart grid technology will fundamentally change the current distribution way, it not only helps to reduce the power demand, cost savings butalso can significantly improve power systemreliability and efficiency. Smart grid can be used for real-time monitoring of power using sensors and new network technology. It can be used to automatically control power flow. However, the smart grid also brings security and privacy, large-scale distributed sensor management system and other complex issues such as single-line-to-ground fault, double-line-to ground fault, line-to-line fault, etc. This paper presents the review of smart grid and functional characteristics of smart grid technology, summed up the research situation at India and abroad, the significance of developing smart grid in modern power system, cited several key technologies of smart grid and the problems and challenges.

Automatic System Distillation for Wine Fruit

This paper describes in detail an automatic laboratory scale (50 L) batch packed column distillation system, which has been assembled at the Department of Chemical and Bioprocess Engineering of the Pontificia Universidad Catolica de Chile. The system includes real-time monitoring of temperatures (in different parts of the system), alcoholic strength, flow rates and heating power. In addition, this system allows manipulating the flow rate of the cooling water in the partial condenser and the heating power in the boiler. Data acquisition and control strategies were developed in LabVIEW® environment. The system allows developing and managing strategies to control several variables, such as distillate alcohol strength, specific temperatures and heating and cooling rates.

基于DSP的液晶显示模块设计

Electrical energy is a widely used secondary energy.The quality of electric energy directly influences the normal operation of electrical equipment.Therefore,it has practical significance to achieve energy parameters of the dynamic display for real-time monitoring of power quality.In this paper,hardware display circuit is constructed by DSP(F2812)and SMG12864LCD.Data are sent into the DSP through the acquisition module,then displayed on the LCD after processed by DSP.This design consists of DSP and LCD interface circuit and the liquid crystal driver software programs.Experiments show that the liquid crystal display module based on the DSP(F2812)can display real-time power quality parameters,achieving the anticipated design effect.

Market watch

This paper reviews the relationship between specific power system operations and market functions, introduces a definition of market conditions that correspond to grid operating states, and proposes an integrated approach for real-time power market operations and monitoring, which will help ensure reliable operations at the lowest cost in decentralized markets and provide effective incentives for market participants.

A software design for microcomputer based digital instrumentation scheme using a spectral observer

This paper presents a new recursive discrete-time filter for real-time monitoring of voltage, current, active and reactive power of an electrical/electronic network using a spectral observer. From a signal model comprising a decaying d.c., fundamental and harmonic components, an interpolating spectral observer is constructed to give the desired Fourier coefficients recursively. Initially, a dead beat spectral observer is designed with different sampling rates for the digital instrumentation scheme. Further, the performance of the spectral observer has been studied by placing the poles of the observer at locations other than the origin of the ( Z-plane) complex plane. The fast computational processing capability of this algorithm makes it suitable for microprocessor applications. This digital instrumentation scheme is tested in real-time for a laboratory electrical network using an LSI-11/23, 16-bit microcomputer.