【作者】 王正华；

【导师】 徐群；

【作者基本信息】 河海大学 ， 控制理论与控制工程， 2003， 硕士

【摘要】 随着现代电力系统的发展，电力系统的暂态问题越来越严重。相角(包括发电机的功角和母线电压相角)是反映系统稳定性的最主要的状态量，如果它能够被实时测量，可以根据相角信息采取有效的控制措施，从而使得发电机群仍然能够保持同步。为此，必须测量各发电机的功角，并把此信息送到调度中心。而且，这些发电机的功角必须在同一时刻下测量，必须有相同的参考基准。这些都促使我们进行功角测量装置(PMU)的研制。 我们研究了发电机测速脉冲和其A相空载电势相位的关系，提出了只需测量与发电机同轴的测速发电机发出的测速脉冲的分频信号，经过计算就可以得出发电机相角的测量方法。 我们采用了过零检测来测量发电机的功角。采用GPS的秒脉冲作为同步参考基准，从而保证了所测的各发电机的相角具有相同的参考基准。同时这些相角信息也贴上了相应的时间标签。我们在此基础上实现了相应的软硬件。更多还原

【Abstract】 With the development of modern power systerm, the transient stability problem becomes more and more serious. Phaser including phasor of generators and phasor of bus voltage are most important state variables that reflect stability of power systerm .If it can be measured at real time, dispatcher adopts in effect controlling step based on phasor such that all generators can still be synchronously operated To do this, it is necessary to messure the phasor of generators and to send.them to the power system control center. However, these phasor of generators should be messured at the same time and with the same reference.These urge us to research phasor measurement unit.After investigating the relationship between generator measuring speed pulse and its on-load voltage at phase A, it is proposed in the thesis that we can obtained phasor of generators through messuring dividing frequency signal of generator measuring speed pulse.Zero-crossing detecting approach is used to detect the phasor of generators. And the 1PPS of the GPS receiver is used as the synchronous signal and reference to ensure that the messured phasor of generator is the same reference. Also the phasors of generators are labeled with the corresponding standard time. The hardware and the software of PMU are designed and implemented based on those.更多还原