【作者】 胡元海；

【导师】 葛化敏；

【作者基本信息】 南京信息工程大学 ， 系统分析与集成， 2008， 硕士

【摘要】 随着科学技术和经济的快速发展,我国电力事业无论是发电总量还是电网的建设都得到了迅猛发展。电力系统的规模不断扩大,应用在电力线上的非线性负载也越来越多,这些负荷的用电特性(非线性、冲击性和不对称性)使电力系统中电压和电流的波形发生较严重的畸变,对电能质量产生严重影响。电力参数监测作为电能质量监控的一个关键环节,在电力系统运行管理和技术监督中起着重要的作用,同时也是保证电力系统良好供电质量的必要手段。研发高精度的电力参数测试装置,使之能准确记录电力系统运行过程中的电能质量指标、监测电能质量污染源,从而为电网电能质量的治理和改善提供依据,对保证电力系统的安全、经济及稳定运行有重要的意义。本装置应用了TMS320F2812数字信号处理器和高精度ADC,实现对三相电网3路电压、3路电流、功率等基本参数的实时测量,还具备谐波分析的功能。该装置采用交流采样技术采集电网实时电压、电流等数据,实现多种电力参数的在线测量;通过DSP芯片高性能处理能力实现数据处理,进行FFT算法等运算;并通过液晶屏显示三相电压有效值、三相电流有效值、功率、谐波等特征值和三相电压电流波形。同时本系统还有数据上传功能,可以实现分析结果的实时上传,便于数据的进一步分析、统计和存储,为电力部门的安全生产提供长期有效的依据。实践表明,本装置具有很高的测量速度和测量精度,人机界面友好,易于操作,功能齐全,具有可扩展性,也可用于其它参数检测,具有很广阔的应用前景和实用价值。更多还原

【Abstract】 With the progress of science and technology and fast developing economies, China’s power industry has been developing rapidly whether the total powers generation or the power grid construction. Power system is constantly expanding in size, and more and more nonlinear loads are used in power line. Electric characteristics of those loads (non-linear, impact and asymmetric) cause a serious distortion of power system voltage and current waveforms, which is a serious impact to the power quality.Electric parameter measurement is a key part for the controlling of power quality. It also play an important role in supervising and managing of power system, and at the same time it is a necessary means for providing better power quality. It is of great important to research and develop a powerful electric parameter measurement device, which can record indexes of power quality and can supervise polluting source during running in detail, then provide evidence for improving and renovating the power quality, and ensure the security, stabilization and economy of the power system.The digital signal processor TMS320F2812 and 24-bit high precision ADC is used for this device. It can realize real time measurement to some basic parameter of three-phase voltage, three-phase current and power etc; meanwhile, it has the function of harmonic analysis. In this device, the technology of alternating current sampling is proposed to collect voltage and circuit of the electric grid real time. It can realize real time measurement of various electric parameters. The device can proess data according to the FFT algorithm and so on by high-performance DSP chip. It displays three-phrase voltage’s effective values and three-phase current’seffective values, power, harmonic, three-phase voltage and current waveform by LCD. Meanwhile, the device has the function of transfer data; and it is convenient to the data’s further analysis, statistics and memory. It can provide the long-term effective basis for the power system’s safety in production.The practice indicated that the device has very high measuring speed and accuracy, friendly interface, easy to operate, complete function and convenient extension, it can also used for other parameter examinations. So it has the very broad application prospect and the practical value.更多还原