Finally the applications of the proposed adaptive harmonic detection method in three-phase system and some other situations are investigated which generalizes the application range of the proposed algorithm .

最后讨论了该算法在 三相 系统及各次谐波或无功均需检测情况下的应用，拓宽了算法的应用范围。

The results also indicate that when special filters are connected to secondary three-phase system the primary harmonic currents decrease by about 28 % than by using conventional two-phase filters .

结果还表明，当在二次侧 三相 系统接入文中提出的特殊滤波器时，谐波电流比用常规两相滤波器降低约28%。

This paper takes the cascaded H-Bridges rectifier ( CHBR ) stage of cascaded multi-level converter without line-frequency transformer as research subject . The control methods and mathematical models of its single-phase and three-phase system are thorough discussed .

本文以大功率无工频变压器级联式多电平变换器的级联整流级为研究对象，对单相、相 整流级的建模与控制 进行了深入的讨论。

In this thesis the equation of uniform transmission line is derived which is based on the distributed parameter transmission line module . Also the decoupling of three-phase system is achieved .

论文基于分布参数模型，推导了均匀传输线方程，并实现了 三相 线路的解耦。

Multiphase system has many similarities with three-phase system in principle but also many new features . So there are still some problems in theory and practices which are worth research and need to be improved .

多相系统与 三相 系统在原理方面既有相似之处，又引入了很多新的内容，在控制理论和实践应用方面，仍存在较多值得研究和有待完善之处。

This method has a good dynamic response characteristic and solves for the first time the determining problem for the compensation system in single phase system which is also appliable to the three-phase system .

这种新方法具有良好的动态响应性能，解决了单相无功及谐波电流的瞬时补偿系统的检测问题，这种检测方法也能适用于 三相 系统。

A method which detects harmonic current of three-phase system with DSP based on theory of instantaneous reactive power is presented in this paper . The simulation and experiment results show that the scheme is reliable .

根据瞬时无功理论，提出基于DSP的谐波电流检测方法，实现了 谐波电流和无功电流的实时、快速检测。

We also discuss the equivalent circuit of this transformer as well as the theory of the transformation between the three-phase system and the two-phase system .

与此同时，还阐明了该种变压器的等值电路，讨论了 三相与两相系统变换的有关理论问题。

This paper analyzes and calculates the negative current and harmonics of the two-phase system of the impedance-matching balance transformer discusses the influence of electrical traction on operation of the three-phase system .

本文对阻抗匹配平衡变压器两相系统的负序电流和谐波含量进行了分析计算，并讨论了牵引负荷变化对 三相 系统的影响。

According to the relationship between torque pulsation and the switching point in the first cycle of the stator voltage the control strategy for eliminating torque pulsation is given when the motor is connected with the three-phase system .

在仿真分析电机连接 三相 系统时定了电压的第一个 系统周期内开关时刻与转矩脉动关系的基础上，给出了转矩脉动的控制策略。

The designed harmonics-monitor may be applied to single-phase circuit balanced or unbalanced three-phase system . It provides an effective and utility method for continuous and real-time harmonics monitor .

集成化电力谐波智能监测系统可用于单相电路、 三相平衡 系统以及 三相不平衡 系统，为实时、连续的谐波监测提供了一种实用而有效的方法。

Design of a New Harmonic Detector for Three-phase System

一种新型 三相 系统谐波检测装置的设计

Meanwhile due to the existence of the switched-capacitor circuit different capacitance of the dc-link will be presented in a three-phase system .

同时，由于开关电容电路的存在，当变换器处于 三相工作时，在 直流母线侧会出现不同的电容容值，本文推导了直流母线等效电容容值与调制比之间的函数关系式。

An advanced instantaneous detection method for fundamental positive-sequence active current under unsymmetrical and distorted three-phase system voltage

三相电压畸变且不对称时电流基波正序有功分量的改进瞬时检测方法研究

Two - dimensional heterogeneous mass transfer model and its solution for gas-liquid-liquid three-phase system

气液液 三相 体系的二维非均相传质模型与求解

The control principle design idea and engineering fulfilment of TCT static var compensator in unbalanced three-phase system are introduced .

介绍了 三相不平衡 系统 静止型动态无功补偿装置的控制原理、设计思想及工程实现。

The single-phase and three-phase system models are built up and the decoupled power flow is put forward .

建立了单相系统模型和 三相 系统模型，给出了潮流的解耦算法。

The applicability of the proposed method in three-phase system is analyzed .

文章还分析了该算法对 三相 系统的适用性。

To verify the simulation approach simulation results and experimental results of a shunt active filter for harmonic current compensation in a three-phase system are presented .

要核实模仿方法，在一个 三相 系统提出模仿结果和分流器活跃过滤器的实验性结果泛音当前报偿的。

Based on features of negative sequence components in the three-phase system an islanding detection method based on the active negative sequence component disturbance ( ANSCD ) is proposed .

根据 三相 系统含有负序分量的特点，采用有源负序扰动法进行三相并网逆变器的孤岛检测。

Unbalances appear in a three-phase system when voltages or currents differ from on phase .

三相 系统中，某的电压或电流与其它相不相同时，就出现幅值与或相位的不平衡。

Meanwhile the precision result from the model for two-phase system is higher than that for three-phase system .

模型能够较好地描述两相和 三相系统的动力学行为，其中，两相系统的模型精度要比 三相 系统的模型精度稍高。

A new method based on single-phase SSSC for mitigating SSO is proposed following the principle that the energy converting between the electrical and mechanical side of generator will be reduced in unbalanced three-phase system .

基于次同步频率下 三相不平衡能够减少发电机电气侧与机械侧的能量交互的原理，提出了采用单相SSSC的抑制SSO的新方法。

Reactive power compensation of unbalanced three-phase system

三相不平衡 系统的无功补偿控制

The single-phase system is taken as the example to show the calculation process then by using phase-model transformation method and composite modal network we can get the transition resistance calculation method of three-phase system .

从单相系统入手推导了过渡电阻的计算表达式，结合相模变换和复合模网络，给出了 三相 系统的过渡电阻计算方法。

The paper simulates a three-phase system analyzes influence of induction motor dynamics on voltage stability and gives methods to improve voltage stability of induction motor nodes .

对一个 三相 系统模型进行仿真，分析了感应电机动态负荷特性对系统电压稳定性的影响，并给出改善电机节点电压性能的措施。

The forecasting accuracy of two-phase flow is higher than that of three-phase flow which reflects that the character of flow and heat transfer of three-phase flow boiling system is more complex than that of three-phase system .

对比两相和 三相 系统的混沌预测结果可以看出，混沌预测法对两相预测的准确性要高于对三相的预测，这也反映了 三相 系统比两相系统具有更为复杂的流体动力学特性和传热特性；

In unbalanced three-phase system when using d-q calculating mode based harmonic current detecting method there is a systematic error between the detected result and actual current arising by the phase difference of phase locking result and positive voltage component .

在 三相不对称情况下用d-q运算方式谐波检测方法检测 电网谐波时，锁相环的锁相结果与电压正序分量之间的相差使检测结果存在系统误差。

Through the analysis of three-phase system of the classical IEEE 24 nodes the method presented in this paper has been proven to be fast and reliable .

通过经典IEEE24节点的 三相 系统的算例分析，验证了本文所提出的算法具有快速、可靠收敛的优点。