【作者】 刘栋；

【导师】 章健；

【作者基本信息】 郑州大学 ， 电力系统及自动化， 2011， 硕士

【摘要】 随着社会的进步和发展,能源的需量求越来越大,电能作为一种清洁高效、易于传输的能源,占社会消耗的总能源的比也重越来越高,电力负荷也屡创新高。这就对电力系统的运行管理提出了更高的要求。节能减排、走可持续发展的道路已成为现代社会的共识,因此增强电力系统的管理水平,降低电能在传输、管理方面的损耗有着巨大的经济效益和社会效益。对负荷曲线的监测和分类,以及对基于分类算法的线损理论计算方法的研究都有很强的理论意义和应用价值。本文所研究的内容和所做的工作如下：1.电力系统复杂而庞大,如何准确而有效的采集存储大量的有功、无功、电流、电压数据一直是电力系统研究计算的瓶颈,虽然SCADA (Supervisory Control and Data Acquisition)系统(数据采集与监视控制系统)已应用于部分电网,但采集的数据始终处于测量级,并且由于电力线路的干扰造成数据误码率高,采集频率受到限制。本文利用智能电表自带的RS—485接口,研制了跟电表实时通信装置,该装置通信软件基于“DL/T645-2007多功能电能表通信协议编写,具有广泛的适用性。同时采用SD卡存储技术,以适应数据量大的要求。2.传统的负荷分类方法一般都是根据需要从物理性能,电能生产、供给和销售过程,所属行业，负荷在电力系统中的分布以及按时间和重要性等进行分类。本文完全基于对负荷曲线进行研究,根据曲线的形状特征对负荷进行分类,研究了基于负荷特性的分类算法,使得负荷分类更加科学合理,便于计算管理。3.传统的线损计算方法都是基于线路上各个负荷点的功率因数。负荷曲线特征系数、实际运行电压均相同这一假设的前提下,而实际情况并非如此,给线损的理论计算带来了较大误差。本文研究了基于负荷分类后的负荷特性曲线进行线损计算的方法,将各负荷线路带入其实际的负荷特性曲线值,有效提高了理论线损计算的精确度。4.以Microsoft Visio2003图形软件为开发平台,运用VBA经行二次开发,设计了基于负荷归类算法的线损计算软件,使线损计算更加的高效精确,并以实例的形式对河南某地电网经行了实际运算。更多还原

【Abstract】 With social progress and development, the amount of energy to ask is more and more big, the electricity as a clean efficient, easy to transport energy, in social consumption of the total energy than also heavy more and more high, power load reached new highs, this is in power system operation management put forward higher request. Energy conservation and emission reduction, and walk the path of sustainable development has become the consensus of modern society, thus enhance power system management level, reduce the power in transmission, management has tremendous loss of economic benefits and social benefits. To load curve, and the monitoring and classification based on classification of calculate line loss theoretical calculation methods of research all have strong theoretical significance and application value. The result of the research and work done as follows:1. The power system is complex and huge, how to accurately and effective Acquisition to store huge amounts of active, reactive power, current, voltage Data has been the bottleneck of electric power systems research, although calculated Supervisory Control and Data SCADA (Acquisition) system (Data Acquisition and monitoring Control system) has been applied in parts, but the Data grid, and the measured magnitude in the interference of electric circuit is high, and cause Data collected ber restrictions. Flat rate This paper using watt-hour meter bringing RS -485 interface, with meter is developed, the device real-time communication device based on "DL/communication software T645-2007 multi-function watt-hour meter communication protocol" write, has the extensive applicability. Meanwhile SD card storage technology by large amount of data, in order to adapt to the requirement.2. The traditional load classification method are generally from physical according to need, electricity production, can supply and sales process, by sector, load in power system based on time and the distribution and classify the importance, etc. This paper is completely based on study of load curve, according to the shape of the curve of load the line classification feature based on load, classification algorithm to show that the classification more scientific and reasonable load management convenient calculation.3. The traditional loss calculation methods are based on the line every load point on the power factor. Load curve characteristic coefficient, the actual running voltage are the same under the premise of this hypothesis, and actual condition is not so, give line loss the theoretical calculation brought greater error. This paper studies the classification based on load after load characteristic curve of the loss calculation method, the line into each load the actual load characteristic curve value, effectively improve the theoretical loss calculation precision.4. To Microsoft Visio2003 graphics software development platform, using VBA for the line was designed based on the secondary development, the loss calculation classification algorithm load more loss calculation software that allows the efficient accurate, and the form of with examples of Henan somewhere by practical operation power line.更多还原