Electricity meter

About: Electricity meter is a research topic. Over the lifetime, 7894 publications have been published within this topic receiving 42430 citations. The topic is also known as: electric meter & electrical meter.

Meter reading device

Abstract: A utility meter incorporates means to provide information identifying the meter, 1, and information indicative of the meter reading. A device to be utilised in reading the meter comprises a memory 8 and means to transfer, to the memory, the information provided by the meter. The memory is provided with means to enable information to be transferred directly to a computer. The information may be passed from the meter to the device by radio, ultrasonic, or optical transmission. An electricity meter has a modem 15 connected with a transmitter 2 and a receiver 3 and with a ring main supplied through the meter. The meter reading device 5 has a modem 16 connected through a plug and socket 18, 19 with the ring main for transmitting and receiving signals between the meter and meter reading device. A suppressor 13 prevents data signals passing back through the mains supply. Data are downloaded to a computer from an output port 11 of the device memory.

Line loss intelligent evaluation and assistant decision-making system for power distribution network

Abstract: The invention provides a line loss intelligent evaluation and assistant decision-making system for a distribution network. The system comprises a data collection subsystem, a standard dictionary database subsystem, a power grid model management subsystem, a distribution network line loss computation subsystem and a line loss simulated analysis subsystem. The standard dictionary database subsystem is used for setting voltage class information, line type information and distribution transforming type information of the distribution network. The power grid model management subsystem is used for setting factory stand information, feeder line information and region information needed for simulating calculation of the distribution network. According to the set distribution network information, a power grid model is designed, various kinds of power equipment is drawn, and equipment parameters or states are set. The distribution network line loss computation subsystem carries out accurate load flow iteration computation by utilizing the power grid model, a power grid loss module, an electric energy collection system and data of an electricity meter reading system to obtain a theoretical line loss. The line loss simulated analysis subsystem carries out comparison on actual line losses, analyzes management line losses, analyzes composition of the line losses of the power distribution network and occupied proportions of various losses, and establishes a line loss analysis report. Optimization is carried out according to all computed line loss weights, and powerful supporting is provided for loss reduction decision making.

A Methodology for Power Quantities Calculation Applied to an FPGA-Based Smart-Energy Meter

Abstract: A complete description of a field-programmable gate array (FPGA)-based smart energy meter is presented in this article. By implementing the power quantities definitions of the IEEE 1459–2010 Standard, a novel power quality analyzer capable of performing remote monitoring of electric power systems operating under sinusoidal, nonsinusoidal, balanced, and/or unbalanced conditions was developed. In order to ensure portability, the digital signal processing algorithms implemented on the FPGA device were entirely coded in hardware description languages, and all equations of them are fully described to be applied to any digital signal processing environment. These algorithms are completely defined as functions of the grid fundamental frequency, and by adjusting the sampling frequency, the adaptability of all modules developed is ensured. Experimental results were obtained using the developed platform in a three-phase four-wire system operating under several conditions, which were defined by the presence of harmonic components imposed by nonlinear loads and supply voltages, as well as by setting bidirectional power flow in distributed generation scenarios by employing a photovoltaic system. Real-time and parallel processes are validated as well.

Remote electric power metering system

Abstract: The utility model discloses a remote electric power metering system which comprises an electric meter terminal, a concentrator and a metering center PC terminal. The key point lies in that a collector is arranged between the electric meter terminal and concentrator, thereby forming a four-layer two-way transmission structure formed by the electric meter terminal, the collector, the concentrator and the metering center PC terminal; the two-way data transmission between the collector and the electric meter terminal is realized by virtue of a 485 communication module; the two-way data transmission between the concentrator and the collector is realized by virtue of a wireless network module; and the two-way data transmission between the concentrator and the metering center PC terminal is realized in GPRS/CDMA communication mode. The utility model has the advantages of convenient networking, low cost, stable data transmission, strong anti-jamming capability and simple and convenient maintenance; and is applied to the remote electric power metering, power utilization management and user power utilization information feedback.