智能变电站故障录波数据分析系统的设计与开发

发布时间：2018-05-30 07:24

本文选题：智能变电站 + 故障录波　；参考：《山东大学》2015年硕士论文

【摘要】：智能变电站故障录波系统是针对当前智能电网的发展而设计开发的。当电网发生故障或受到扰动时,故障录波装置会记录电网电压、电流以及保护动作情况,得到大量非常有研究价值的数据,通过分析这些数据可以得到电网的各种状态参数,如电压、电流、有功、无功和频率等,以便分析事故原因、得出事故对策。故障录波数据分析系统对保证电力系统安全可靠运行起着十分关键的作用,它已成为电力系统自动化的重要组成部分。智能变电站的出现不仅促进和推动了故障录波技术的发展,在录波配置、采样方式和接线方式等方面进行改进,而且也对录波技术提出了更高的要求。本文提出的智能变电站录波数据分析系统基于一体化监控平台,其基本结构由数据采集和记录系统、数据传输系统、数据分析系统、数据管理系统构成。数据采集和记录系统采用嵌入分布式录波方法生成录波文件,数据传输系统将录波文件传送给数据分析和数据管理系统,数据分析系统对录波文件进行包括波形展示、电压电流幅值相位计算、保护动作特性分析等处理,数据管理系统采用文件管理技术对录波源文件和分析结果文件进行管理。数据分析功能包括基本分析功能和高级分析功能。基本分析功能包含两部分：一是波形展示,即将录波文件中各通道的采样值直接展示出来,从而获取故障发生时刻、故障维持时间、故障切除时刻,判断故障发生相别等；二是从数据文件中提取固定时间段的基本电气量,比如电压电流基波和各次谐波的幅值、相位等,通过左右光标的移动实现数据窗口的推移,得出这些电气量随时间变化的值,为电力系统故障分析提供依据。高级功能包括距离保护动作特性分析和纵联保护动作特性分析。其中距离保护动作特性分析功能根据故障录波文件得到测量阻抗随时间变化的值以及阻抗动作特性。纵联保护动作特性分析包括方向式纵联保护特性分析和纵联电流差动保护特性分析,分别通过计算功率方向元件相位和差动电流、制动电流得到保护动作特性,为保护动作分析提供依据。利用VC++开发语言在vs2008和Qt4.3.0混合平台上对上述功能进行了开发,并在Windows操作系统下采用现场测试和实验室测试方案分别对基本分析功能和高级分析功能进行测试。测试结果表明,该系统能够充分有效地利用故障录波数据,真实地再现故障和异常运行时的电气量变化过程。
[Abstract]:The fault recording system of intelligent substation is designed and developed according to the development of smart grid. When the power network fails or is disturbed, the fault recording device will record the voltage, current and protection action of the power network, and obtain a large number of very valuable data. By analyzing these data, we can get the various state parameters of the power network. Such as voltage, current, active power, reactive power and frequency, in order to analyze the cause of the accident, the accident countermeasures. Fault recording data analysis system plays a key role in ensuring the safe and reliable operation of power system. It has become an important part of power system automation. The emergence of intelligent substation not only promotes the development of fault recording technology, but also improves the recording configuration, sampling mode and wiring mode, and puts forward higher requirements for recording technology. The intelligent substation recording data analysis system is based on an integrated monitoring platform. Its basic structure is composed of data acquisition and recording system, data transmission system, data analysis system and data management system. The data acquisition and recording system uses embedded distributed recording method to generate the recording file. The data transmission system transmits the recording file to the data analysis and data management system. The data analysis system carries on the display of the recording file including the waveform. The amplitude and phase calculation of voltage and current, the analysis of protective action characteristics, and so on. The data management system uses file management technology to manage the source files and the analysis result files. The data analysis function includes basic analysis function and advanced analysis function. The basic analysis function includes two parts: one is waveform display, which shows the sampling value of every channel in the recording document directly, so as to obtain the fault occurrence time, the fault maintenance time, the fault removal time, the judgment fault occurrence phase and so on; The second is to extract the basic electrical quantities of a fixed period of time from the data file, such as the amplitude and phase of the fundamental wave of voltage and current and the harmonics of each order, etc. By moving the left and right cursors to realize the passage of the data window, we can get the values of these electrical quantities changing with time. It provides the basis for power system fault analysis. Advanced features include range protection action characteristics analysis and longitudinal protection action characteristics analysis. The range protection action characteristic analysis function obtains the measured impedance value with time and the impedance action characteristic according to the fault recording file. The analysis of the action characteristics of the longitudinal protection includes the characteristic analysis of the directional longitudinal protection and the characteristic analysis of the differential protection of the longitudinal current. By calculating the phase of the power directional element and the differential current, the protective action characteristics of the braking current are obtained, respectively. It provides the basis for the analysis of protective action. The above functions are developed on the mixed platform of vs2008 and Qt4.3.0 with VC development language, and the basic analysis function and the advanced analysis function are tested under the Windows operating system by field test and laboratory test respectively. The test results show that the system can make full and effective use of fault recording data and can reproduce the process of electrical quantity change in fault and abnormal operation.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM76;TM63

【共引文献】