光纤电流互感器在线误差比对装置的设计与实现

发布时间：2018-04-06 06:02

本文选题：电子式互感器　切入点：全光纤光学电流互感器　出处：《东南大学》2015年硕士论文

【摘要】：电子式互感器以其传感机理先进,绝缘相对简单,动态范围大,频率响应宽,准确度高,适应电能计量、数字化保护和自动化发展方向,将逐渐取代电磁式互感器。近年来,为深化智能电网的发展,作为电子式互感器其中之一的全光纤光学电流互感器,陆续投运于各大智能化变电站。然而,全光纤光学电流互感器中存在线性双折射,对温度和振动等环境因素变化十分敏感,所以相对于传统电磁式互感器在投运后的校验和误差调试,全光纤光学电流互感器突显出比较多的不确定性,投运后的误差运行状况至今都没有相关实践数据。为适应全光纤光学电流互感器现场运行误差特性研究的目的,依照光学电流互感器量值溯源原理及相关的国标和企标,首先需要研制一套全光纤光学电流互感器的角差、比差比对误差计算装置,实现对光电流互感器现场运行状态特征数据的采集。全光纤光学电流互感器误差在线比对装置实践化了全光纤光学电流互感器量值溯源原理,实现了在运全光纤光学电流互感器比对误差数据及相关参数数据的检测和采集,同时,利用了数据库技术、网络技术、数据处理等技术实现了监测数据的汇总、存储、远程推送以及数据展示、深度分析等能力。本文研究变电站内互感器到主站、数字表的通信协议,结合误差的形成机理,对传统互感器进行采样、模数转换、数字处理,与全光纤光学电流互感器通过光纤传来的电流幅值、相角通过全相位谱分析的算法进行比对计算出实时误差。最后通过江苏无锡西泾变的挂网运行,验证了比对分析系统的可行性,从而为全光纤光学电流互感器的运行误差分析提供数据依据,实现了全光纤光学电流互感器的实时监测现场运行误差,保证智能化变电站的电能计量的准确性和可靠性,具有良好的应用前景。
[Abstract]:Because of its advanced sensing mechanism, relatively simple insulation, large dynamic range, wide frequency response, high accuracy, suitable for electric energy measurement, digital protection and automation, electronic transformers will gradually replace electromagnetic transformers.In recent years, in order to deepen the development of smart grid, the all-fiber optical current transformer, one of the electronic transformers, has been put into operation in various intelligent substations one after another.However, there is a linear birefringence in all-fiber optical current transformers, which is sensitive to environmental factors such as temperature and vibration.All optical fiber optical current transformers highlight a lot of uncertainties, and there are no relevant practical data about the error operation after operation.In order to meet the purpose of studying the field operation error characteristics of all optical current transformers, according to the traceability principle of optical current transformers and the relevant national standards and standards, it is necessary to develop a set of optical current transformers' angle difference.The difference ratio error calculation device is used to collect the characteristic data of the field operation state of the optical current transformer.The principle of tracing the value of optical current transformer is put into practice in the all fiber optical current transformer error online comparison device, and the error data and related parameter data of the optical current transformer are measured and collected in the operation of all optical fiber optical current transformer, at the same time,Database technology, network technology and data processing technology are used to realize the ability of data collection, storage, remote push and data display, depth analysis and so on.In this paper, the communication protocol of transformer to master station and digital table in substation is studied. Combining with the formation mechanism of error, the traditional transformer is sampled, analog-to-digital conversion, digital processing.The real time error is calculated by comparing the current amplitude and the phase angle between the optical current transformer and the all fiber optical current transformer through the all phase spectrum analysis algorithm.Finally, the feasibility of the comparison analysis system is verified by the operation of the Xijing transformer in Wuxi, Jiangsu Province, which provides the data basis for the analysis of the operating error of the optical current transformer.The real-time monitoring error of all optical current transformer is realized, and the accuracy and reliability of the intelligent substation is guaranteed. It has a good application prospect.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM452

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