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This paper presents a design approach to an embedded monitoring system found in distributed renewable energy power systems. The grid connected distributed power system, delivers energy to the consumers located on the micro-grid, operating at distribution voltage levels, and also delivering the remaining surplus energy to the main distribution grid. The aim of this paper is to present the development...
In this paper, we propose a cost-effective hardware design for acquiring high-resolution energy data from electricity mains to observe appliance switching transients. By utilizing these distinct appliance switching transients, we are interested to predict all appliances operating in a building and also estimate their power consumption. The proposed design fulfills the data acquisition requirements...
An electroencephalogram, or EEG, is used to monitor the electrical activity in the brain through electrodes placed on the scalp. An EEG is a multi-channel time-varying signal describing voltages in different regions on the scalp, measured using electrodes. EEG recordings are interpreted using a montage, which defines the channels as differences between these electrodes. AutoEEG is a system that automatically...
This paper presents an adaptative self-powered energy harvester strain sensing device based of mechanical vibrations for structural health monitoring applications which, even having multiple fields of application, is framed in the aerospace field. This solution uses a piezoelectric transducer as an energy source, harvesting the energy provided by the in-flight vibration of the aircraft's wing, and...
Stator winding is one of the most vulnerable parts in Switched Reluctance Machine (SRM), especially under thermal stresses during frequently changing operation circumstances and susceptible heat dissipation conditions. Thus real-time online thermal monitoring of the stator winding is of great significance to the system protection and lifetime extension of SRM. A sensor-less approach for online thermal...
In this paper, a 10-b analog-to-digital converter (referred to as EMADC) for directly monitoring electrical stimulator outputs with voltage from ∼0V up to ∼45V is proposed. A new high voltage (HV) switch for sampling is also proposed. The maximum input voltage for the HV switch is only limited by the drain-to-source breakdown voltages of the HV transistors. The EMADC was implemented in a 0.18μm CMOS...
Applied Relay Testing Ltd is a specialist Company that has created a range of advanced test products dedicated to relays and switch devices covering the areas of low-level parametric measurement, life-testing and high-voltage qualification. Traditional relay life test systems are often constrained to only basic functionality such as the measurement of closed contact resistance and confirmation that...
This paper presents a new method for relative location of voltage sags and capacitor switching transients based on voltage measurements only. Voltage sags caused by network faults and transients caused by bank capacitor energizing are considered in this work. The algorithm automatically operates for assessing power quality, characterising and extracting information from voltage records obtained from...
A new source-side monitored capacitive power transfer system (CPTS) for contactless mobile charger using Class-E converter is proposed. Contrary to conventional contactless mobile charger, an exact battery voltage monitoring is achieved without additional cumbersome communication circuits. The proposed CPTS operates in two iterative modes; a main-charging-mode and a sub-battery-monitoring-mode. Not...
We propose a maximum power point tracking (MPPT) circuit for micro-scale sensor systems that measures ripple voltages in a switched capacitor energy harvester. Compared to conventional current mirror type MPPT circuits, this design incurs no voltage drop and does not require high bandwidth amplifiers. Using correlated double sampling, high accuracy is achieved with a power overhead of 5%, even at...
An over-voltage online monitoring system based on the impulse full current of arrester is developed in this paper. The system measures the wave head and amplitude of the impulse full current of arrester through external-integral rogowski coil, and transfers the measurement result to the upper computer via USB optical measuring system, and then implements the measurement and monitoring on over-voltage...
This paper present the design and implementation of a pilot smart grid in the colombian distribution network. This smart grid consists in a low voltage system connected to the existing electricity distribution network, which consider distributed generators and control, supervision and communications systems. These elements allow to provide electric power generation under the scheme of smart grid,...
The vertical input path of an oscilloscope setting at high sensitivity is often damaged while the rising stage of a big pulse signal is measured. From the switch diode type protector, a novel oscilloscope vertical input path protector based-on integrated operational amplifier is developed. The defects such as positive reflection and impedance dis-matching existing in the switch diode type protector...
Aiming at low control accuracy in welding and dismounted the shunts by hand as well as too many subjective factors in manual recording data in the process of baking of aluminum reduction cell, we have designed a set of baking shunt auto control system. The system mainly contains two parts, baking shunt switch and the control system composed of Programming Logic Controller as well as industrial personal...
The Reactive power compensator and monitor of Power factor system is designed based on ARM7, with function of long distant transmission. It monitors and measures alternation current parameters, such as the active and reactive electric energy, active and reactive power, voltage, current, power factor and other parameters. To realize reactive compensation, it can automatically switch shunt compensation...
To access the batteries information in the process of charge and discharge in time, the article designed a monitoring system for the condition of storage batteries based on ZigBee. This approach used the chip of CC2430, which was integrated of AD converter, 8-bit strengthened MCU and wireless RF unit. The chip of CC2430 and the external circuits were made up the node of the star network. The temperature,...
This paper describes a design of a multi-channel telemetry unit for monitoring distribution switching station based on TMS320F28016 DSP. It details the composition of the hardware block diagram and the design of software. It is capable of measuring multi-channel three-phase voltage and current. In the software, it adopts Fast Fourier Transform to compute multi-channel three-phase voltage, current,...
With the wide spread of HV switch cabinet in the electric system, how to effectively monitor the insulation inside the cabinet to avoid the fault is an important subject which all technicians are confronted with. The principle of the TEV measurement and its application in electric system are introduced to demonstrate the effectiveness of this method in the online test of partial discharge in the HV...
In this paper, a method is proposed for determining the exact location of switched capacitor banks in distribution systems. The method consists of two steps. In the first step, the technique is based on measurement of voltage and current transients created by capacitor switching. The hypothesis states that: The slope of voltage and current transient wave forms created by capacitor switching immediately...
In this paper, a new method is proposed for tracking and finding the location of shunt switched capacitor banks in distribution systems. The technique is based on measurement of voltage and current transients created by capacitor switching. The hypothesis states that: ??the slope of voltage and current transient waveforms created by capacitor switching immediately before and after the switching instant...
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