适用于PMU校准器的相量测量方法研究及应用
发布时间：2018-07-13 18:48
【摘要】：同步相量测量单元(Phasor Measurement Unit,PMU)的广泛应用,为实现大规模区域电网的动态安全监控提供了数据基础。进行PMU静动态测试,对其相量量测精度进行校准,是保证PMU可靠应用的前提。基于校准器的PMU静动态测试系统将校准器输出作为标准值,弥补了基于高精度信号源的PMU静动态测试系统产生时延与无法在线测试的缺陷。进行PMU校准器同步相量量测方法的研究是搭建测试系统的重点。因此,研究适用于PMU校准器的相量测量方法,并将其应用至PMU测试系统中,有着深远的意义。论文实现了改进插值DFT同步相量算法,通过添加窗函数,并利用迭代对主频负分量引起的误差进行补偿,弥补了传统插值DFT同步相量算法的不足,在保证计算速度的前提下,提高了计算精度,可用于静态测试的幅值与相角计算。为了进一步提高算法精度,论文提出了非线性回归同步相量算法。通过对测试信号进行有针对性的建模,在Levenberg-Marquardt法的基础上,实现了同步相量的计算。进一步,论文将非线性回归同步相量算法应用至PMU校准器硬件平台,搭建基于校准器的PMU静动态测试系统,并利用测试系统进行了测试。
[Abstract]:The application of Phasor Measurement Unit (PMU) provides a data base for the dynamic security monitoring of large-scale regional power network. The static and dynamic measurement of PMU and calibration of its phasor accuracy are the prerequisite to ensure the reliable application of PMU. The static and dynamic test system of PMU based on calibrator takes the output of calibrator as the standard value, which makes up for the defects of the static and dynamic test system of PMU based on high precision signal source, such as delay and unavailability of on-line test. The research of PMU calibrator synchronous phasor measurement method is the key of building the test system. Therefore, it is of great significance to study the phasor measurement method suitable for PMU calibrator and to apply it to PMU test system. In this paper, the improved interpolation DFT synchronization phasor algorithm is implemented. By adding window function and using iteration to compensate the error caused by the negative component of the main frequency, the deficiency of the traditional interpolation DFT synchronization phasor algorithm is made up, and the calculation speed is guaranteed. The calculation accuracy is improved and can be used to calculate the amplitude and phase angle of static test. In order to further improve the accuracy of the algorithm, a nonlinear regression synchronous phasor algorithm is proposed. Based on Levenberg-Marquardt method, the synchronous phasor is calculated by modeling the test signal. Furthermore, the nonlinear regression synchronous phasor algorithm is applied to the hardware platform of PMU calibrator, and the static and dynamic test system of PMU based on the calibrator is built, and the test system is used to test the system.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM930
本文编号：2120403
[Abstract]:The application of Phasor Measurement Unit (PMU) provides a data base for the dynamic security monitoring of large-scale regional power network. The static and dynamic measurement of PMU and calibration of its phasor accuracy are the prerequisite to ensure the reliable application of PMU. The static and dynamic test system of PMU based on calibrator takes the output of calibrator as the standard value, which makes up for the defects of the static and dynamic test system of PMU based on high precision signal source, such as delay and unavailability of on-line test. The research of PMU calibrator synchronous phasor measurement method is the key of building the test system. Therefore, it is of great significance to study the phasor measurement method suitable for PMU calibrator and to apply it to PMU test system. In this paper, the improved interpolation DFT synchronization phasor algorithm is implemented. By adding window function and using iteration to compensate the error caused by the negative component of the main frequency, the deficiency of the traditional interpolation DFT synchronization phasor algorithm is made up, and the calculation speed is guaranteed. The calculation accuracy is improved and can be used to calculate the amplitude and phase angle of static test. In order to further improve the accuracy of the algorithm, a nonlinear regression synchronous phasor algorithm is proposed. Based on Levenberg-Marquardt method, the synchronous phasor is calculated by modeling the test signal. Furthermore, the nonlinear regression synchronous phasor algorithm is applied to the hardware platform of PMU calibrator, and the static and dynamic test system of PMU based on the calibrator is built, and the test system is used to test the system.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM930
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