| 1. | Family of oscillation characteristics
振荡特性曲线族 |
| 2. | Oscillation characteristic family
振荡特性曲线族 |
| 3. | Research of self - oscillation characteristics of large hydroelectric machines based on finite element method
基于有限单元法的大型水轮发电机组自振特性研究 |
| 4. | In order to overcome those defects , we chose the fluid oscillation characteristics of vortex type fluid oscillatory flowmeter as research subject on the basis of the former achievement
本论文针对旋涡型流体振动流量计小流量信噪比低和抗干扰性能差等问题，确定以流体振动特性应用基础为主要方向。 |
| 5. | The technique of fluid mechanics simulation and the technique of modern fluid mechanics experiment were applied to research on the fluid oscillation characteristics of vortex flowmeter and vortex precession flowmeter
以流场仿真技术和实验流体力学的相结合的方法，系统地研究了旋涡型流体振动流量计的流体振动特性。 |
| 6. | It can make the analysis report on the basis of the abstract nation standard . based practical analog analysis in some partial power net , obtain the harmonic oscillation characteristic curve , and verify the software is right
通过对某局域电网的实例仿真分析，结果表明，获得了谐波谐振特性曲线，还根据实际测试数据，恢复了电网实际电压电流波形，验证了软件的正确性。 |
| 7. | But , the measured - data is a very great quantity and every data contain all data of 1 - 25 harmonic , measured time can have hours to days . the count by hand is very heavy and over - elaborate , sometimes the statistics results is error . it won " t reach the analysis purpose and don " t obtain the curve of harmonic oscillation characteristic in a row frequency range
可是，测试数据经常是大量的，每一组数据又包含从基波到25次谐波的所有数据，测试时间可能是几个小时，有的甚至是几天时间，这样的工作量由人工完成是非常繁重的，又是非常繁琐的，有时还统计不出正确的数值，起不到应有的测试分析目的，更无法获得连续频域内的谐波谐振特性曲线。 |
| 8. | The torsional interaction from the electrical couplings among the generating sets is presented and the influence of the natural torsional frequency of the generating sets on the torsional oscillation characteristics is described . the torsional dynamics between identical parallel turbine - generators are deduced as well as that between non - identical parallel turbine - generators . then the basic principle of equivalent simplification of generating units for different operational condition is summarized
( 2 )介绍了多机电力系统机组间电气耦合对轴系扭振特性的影响，以及机组自然频率与机组扭振相互作用的关系，并对复杂系统中并列运行的相同发电机和不同发电机间的扭振相互作用进行了分析，归纳了不同运行条件下机组等值简化的基本原则。 |
| 9. | This paper makes a science analysis to power system " s harmonics and harmonic oscillation in partial power net , develop the analysis software of harmonic oscillation characteristic . make use of this software can obtain the harmonic oscillation characteristic curve in a row frequency range , can discover accurately oscillation , can make an in - depth analysis and statistics and renew the realistic curve of voltage or current on the basis of the measured - data
本文通过对电力系统谐波及局域电网谐波谐振现象的理论分析，设计、开发了局域电网谐波谐振特性分析软件，利用该软件可以获取连续频域内的谐波谐振特性曲线，发现准谐振区域，而且还能根据实际测试数据，正确统计分析出所要求的参数，同时能够恢复电网实际的电压、电流波形，并能根据国家标准自动生成分析报告。 |
