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The Design of an Intelligent Transformer Terminal Unit

Author: DengJian
Tutor: HuangGuangMing
School: Central China Normal University
Course: Circuits and Systems
Keywords: Distribution Automation Distribution transformer monitoring terminal Reactive power compensation Composite switch
CLC: TM764
Type: Master's thesis
Year: 2009
Downloads: 205
Quote: 3
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Abstract


Distribution transformers and electrical energy directly to electrical equipment assigned to the low-voltage users , both the forefront of the distribution network terminal user plays a connecting role in the distribution network , and directly affect the performance of the distribution transformer distribution network the quality of power supply . A large number of distribution transformers , and most of the outdoors , their safety can not be guaranteed due to the long-running unattended . Distribution transformer monitoring terminal is installed next to the distribution transformer monitoring of transformer running state of the terminal device . Basic features include real-time monitoring of the operating condition of the transformer distribution transformer monitoring terminal to detect the abnormal operation of the transformer and processing ; real-time acquisition transformer operating parameters and users of electricity , to provide the data basis for the optimized operation of the distribution network ; achieve with transformer low voltage side reactive power compensation to improve the quality of power supply distribution network . Demand based on the current development of China 's distribution network and distribution automation systems for the problems of the existing domestic distribution transformer monitoring terminal of the overall design of distribution transformer based on high-performance processors and high-precision energy measurement chip terminal completed the the terminal prototype development and debugging . Designed with the need to change the low-voltage side reactive power compensation of reactive power compensation capacitor switching algorithm developed for reactive power compensation capacitor switching switch . The main content of the article is divided into three parts : First, according to the working principle and structure of the monitoring system of distribution transformer , distribution transformer monitoring terminal functionality and performance requirements analysis, the high-performance ARM Cortex-M3 processor and high-precision energy metering chip ATT7022C of overall design , detailed discussion of the distribution transformer monitoring terminal hardware design , software process analysis terminal . Followed by nine research substation reactive power compensation and voltage optimization graph algorithms , combined with the need for distribution transformer low-voltage side reactive power compensation design and improved nine districts graph algorithms , and to explore the long-term operation of the reactive power compensation capacitor mechanism. Finally , according to the special requirements of reactive power compensation capacitor switching switch , developed a composite based on intelligent the triac and magnetic latching relay switch capacitor to achieve the zero-crossing switching to ensure the safe operation of reactive power compensation capacitor .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation > Distant measurement and remote control
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