分布式电能质量监测及评估研究

发布时间：2018-03-17 20:29

本文选题：电能质量　切入点：监测装置　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着电网规模的不断扩大,电力系统中大量非线性和冲击性负荷使用使得电能质量问题日益突出,为实现电能质量的区域监测,研究和设计一种分布式电能质量监测装置显得尤为重要。而电力市场化改革的不断深入,为达到电能作为商品“按质论价、优质优价”目标,实现电能质量全面科学地评估具有重要意义。本文结合国内外电能质量监测装置现状及发展趋势,为实现电能质量监测与评估,设计基于ARM Cortex-M3内核的LPC1768与DSP内核的ADE7880相结合的高精度、多功能的分布式电能质量监测装置,并提出电能质量单项评估和综合评估模型。首先,本文根据国内外相关标准,总结归纳各电能质量监测参数的测量原理和数学模型;依据实际需求分析,设计分布式电能质量监测装置硬件系统,主要包括监测数据采集模块、系统主控模块、分布式网络通信设计以及电源系统设计;并通过干扰源分析采取相应措施提高监测装置抗干扰能力。其次,研究电能质量评估相关理论,应用概率数理统计、矢量代数法和模糊数学法,提出本课题监测装置电能质量单项评估和综合评估模型;优化改进单项指标量化等级划分和综合评估权重矢量;结合实际算例分析验证电能质量评估模型科学合理性。最后,搭建测试平台,完成监测装置整机功能和精度要求测试验证,并分析测试结果,提出相应改进措施。测试表明,本监测装置完成各参数监测功能并具有较高测量精度,功能上包括基本参数测量、电网谐波分析、电能事件监测以及分布式网络通信;精度上电压有效值为±0.5%、频率为±0.01Hz、谐波分析符合国标GB/T 19862-2005 A级标准;整机基本达到预期设计目标。
[Abstract]:With the continuous expansion of power network scale, a large number of nonlinear and impact load use in power system makes the power quality problem more and more prominent. In order to realize the regional monitoring of power quality, It is very important to study and design a kind of distributed power quality monitoring device. It is of great significance to realize the comprehensive and scientific evaluation of power quality. In order to realize the monitoring and evaluation of power quality, this paper combines the current situation and development trend of power quality monitoring devices at home and abroad. This paper designs a high precision, multi-function distributed power quality monitoring device based on LPC1768 based on ARM Cortex-M3 kernel and ADE7880 based on DSP kernel, and puts forward a single evaluation and comprehensive evaluation model of power quality. This paper summarizes the measuring principle and mathematical model of power quality monitoring parameters, designs the hardware system of distributed power quality monitoring device according to the actual demand analysis, mainly includes monitoring data acquisition module, system main control module, Distributed network communication design and power supply system design, and through the interference source analysis to take appropriate measures to improve the anti-jamming ability of monitoring devices. Secondly, research power quality evaluation theory, apply probability mathematical statistics, Vector algebra method and fuzzy mathematics method are used to put forward the single evaluation and comprehensive evaluation model of power quality of the monitoring device, and to optimize and improve the quantization of single index and the weight vector of comprehensive evaluation. The scientific rationality of power quality evaluation model is verified by practical examples. Finally, the test platform is built to test and verify the function and precision of the whole monitoring device, and the test results are analyzed, and the corresponding improvement measures are put forward. The test results show that, The monitoring device completes the monitoring function of various parameters and has a high measurement precision, including basic parameter measurement, power network harmonic analysis, power event monitoring and distributed network communication. The effective value of voltage is 卤0.5 and the frequency is 卤0.01 Hz in accuracy. The harmonic analysis conforms to the national standard GB/T 19862-2005 A standard, and the whole machine basically achieves the expected design goal.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM76

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