Applications of load control and management system in power distribution automation

By Jiangsu EPRI

From the position of load control and management system in power distribution automation, the article describes its history, basic functions and developing trend. Focusing on its current application situation, the article introduces its network, basic functions, each constituent part and realization, analyzes its characteristics, summarizes its developing trend and significance, as well points out several problems which should be paid attention to when using it. All above provide some guidance on how to use and popularize the load control and management system.　

Transformer in power distribution and its future

By High Voltage Research Institute, Wuhan

The innovation of transformer keeping pace with the secondary equipments development is a key issue on transformer industry for survival. Not saying that the existing transformers can not match with the current electronic equipments and digital equipments, the problem is that according to government’s policy on building a resource-economic society, the traditional transformer’s structure made a lot of waste in resources. Their survival is facing critical challenges.

The present situation and developing trend of gas meter

By Beijing Shougang Automation Information Technology Co., Ltd

Most of the residential gas meters existed in China market now are mechanical membrane type and IC membrane type. Mechanical gas meters still occupy enormous market share, there are (  ) gas meter manufacturers in China, and (  ) are IC card gas meter manufacturers. According to the incomplete statistic, there are (  ) pcs mechanical gas meter and (  ) pcs IC card gas meters installed in China market in 2003; and (  ) pcs mechanical gas meter and (  ) pcs IC card gas meters installed in 2004.

Application of low-voltage Automatic Meter Reading system (AMR) in Guangdong power network

By Guangdong Electric Power Group

The application of low-voltage AMR in Guangdong power network experienced four phases: Pilot-SAT-Selection-Promotional application. In the second half year of 2004, Guangdong Electric Power Group started the low-voltage AMR applications and built up the Phase One Engineering project. Every area power bureau gradually carried out the technical solutions selections and project construction. By the end of June 2005, most projects had been completed for using, and turned into the pilot operation and practical operation.

The successful application of Iskraemeco grid meters in Northwest 750KV Project

By Shanghai Wescon System Controls Co., Ltd

Northwest 750KV Distribution and Exchange Project is the first distribution and exchange project with the highest voltage level, its establishment was authorized by the State Planning and Development Committee. The whole project will be built up in late August 2005, and start in operation in September 2005. With its completion, the tight situation of power supplying in Northwest power network will be effectively improved. It will be an example project for nationwide power network upgrading.

The principium and application of NvSRAM

By Shenzhen Huazhou Science and Technology Co., Ltd

This article describes in detail the principium, category and application of NvSRAM, which is produced by ZMD company German by adopting SRAM+EEPROM to together two storage technologies into one chip, it reduces cost and improves reliability.

General introduction of heat meter test technologies

By National Institute of Metrology P.R.China

There are millions of small size boilers for residential heating supplying in China, the annual fee reaches hundreds billions. Therefore, the accurate metering and scientific and reasonable charge for heat water  are the big issue concerned to the country and people.

Bridged multi-rate network electricity meters

By Nanjing Sanneng Instrument Co., Ltd 

Bridged multi-rate network electricity meter is a new generation electronic multi-rate electricity meter product, which is designed for automatic meter reading system. Meter is acted as repeater, as well bridged equipment. Meter reading can be realized by any one meter reading the other bridged meters installed in the area under the same transformer instead of reading meter one by one, which makes on-site meter reading more convenient.

Networked prepayment meter

By Beijing Nasi Electric Co., Ltd

Due to the large numbers and widely applications of residential water meter, electricity meter, gas meter and heat meter, how to solve the revenue collection in a more convenient, more scientific and more advanced way is always an industry focused topic. Meanwhile, the new management needs like TOU, graded water prices and so on make us seek a new technology and a new meter. Herein, we put forward a new concept of networked prepayment meter basing on remote communication technology, it can well solve the problems in metering, revenue collection and management for water, electricity and gas.