电压稳定

直接计算动态电压稳定Hopf分岔点的方法

A Method to Directly Calculate Hopf Bifurcation Point of Dynamic Voltage Stability

电压稳定中的Hopf分歧分析

Analysis voltage stability using Hopf bifurcation theory

采用PWM信号对控制电路自动调节进行设计，使输出电压稳定。

Furthermore , the output voltage stabilized by an automatic circuit controlled by the PWM signal .

直接求解该拓展系统就可以获得电力系统动态电压稳定的Hopf分岔点，简化了计算过程。

The Hopf bifurcation points can be ascertained by solve the new augmented system .

基于PMU和改进戴维南等值模型的电压稳定在线监视

On-line Voltage Stability Monitoring Based on PMU and Improved Thevenin Equivalent Model

基于WAMS的在线电压稳定指标及其评估方法研究

Study on On-line Voltage Stability Index and Assessment Based on WAMS

本文提出了一种基于PSS／E的静态电压稳定极限计算方法。

A method , which is for computing the voltage stability limit based on PSS / E , is presented in this dissertation .

装设SVC和TCSC后可以显著地增大系统的电压稳定功率极限。

Furthermore , the critical power of voltage stability of system is increased when SVC or TCSC is installed .

通过MATLAB仿真软件分别建立了两种控制系统的仿真模型并进行了仿真与分析，从而验证了两相调制控制策略在保证输入电流正弦化、母线电压稳定的同时可以有效地降低功率器件的开关损耗。

Using MATLAB simulation software , the thesis simulates and analyzes dynamic performance of control system , proving that two-phase modulation method can reduce the switching losses of the power electronic devices .

就电力系统中节点电压稳定问题进行了研究，基于人工智能方法中的模糊逻辑理论，提出了一种具有闭环跟踪节点电压能力的fuzzyPI电压调节方法。

Researching the node voltage stability of electric power system , we have advanced a Fuzzy PI voltage regulating method with the ability of following up the node voltage based on Fuzzy Logic theory .

基于Delta逆变技术的交流稳压电源既能进行瞬时的交流电压稳定补偿，又能提高整流输入端的功率因数，减少谐波对电网的污染，因而具有重要的实际意义和研究价值。

The power supply based on Delta inverter can stabilize voltage and improve the power factor of the input to reduce harmonics . Therefore it has important actual meaning and research value .

用EEAC法分析小扰动电压稳定

Small - disturbance voltage stability analysis with EEAC method

一种基于V-I特性的节点电压稳定快速判断方法

A practical method to judge static voltage stability of load nodes based on V-I characteristic

采用时域仿真法分析了有载调压变压器（OLTC）对电压稳定的动态影响。

The effect of OLTC on the voltage stability is analyzed through time domain simulation .

一种使Charge-pump的输出电压稳定的时钟电路

A kind of clock circuit that can stabilize the output voltage of the charge-pump

稳压控制电路的作用是将输出端电压稳定在24V。

The function of voltage regulator is to make 24V steady voltage output .

本文从提高交流系统静态电压稳定和动态电压稳定两个方面，对VSC-HVDC的系统级控制策略进行了相关研究，主要研究内容和成果如下。

This article conducts research on VSC-HVDC system-level control strategy for improving AC system static voltage stability and dynamic voltage stability .

首先对基于UI特性的电压稳定判据作简单回顾，讨论节点负荷配比对电压稳定性的影响；

This paper reviews steady state voltage stability based on U I characteristics first . A new method is preferred for steady state voltage stability criterion after studying influence of load type components .

将简单系统基于V-I特性的电压稳定判别法成功地应用于复杂系统，推导出了判断负荷节点静态电压稳定性的公式。

A voltage-stability discrimination method based on V-I characteristic in simple system is applied successfully to the complex one .

基于广义Tellegen定理的静态电压稳定实用判据

A practical method for detecting critical state of voltage stability based on generalized tellegen 's theorem

在电压稳定评估方面，采用基于SVM分类机的电压稳定模型，将电压稳定评估处理成二分类问题，并充分利用广域测量信息以捕捉多种典型系统特征的学习样本。

In the voltage stability assessment , classification machine is used , and it makes full use of wide area measurement system information in order to capture the typical characteristics of a variety of learning samples .

提出了基于特征结构分析法（ESA）的电力系统静态电压稳定分析的新算法。

A new algorithm used for power system steady state voltage stability analysis based on eigenvalue structure analysis ( ESA ) method is proposed .

基于同步相量技术的广域动态测量系统，可以在时空坐标下监测电力系统动态运行特性，弥补了现有SCADA系统和故障滤波系统的不足，为大电网动态电压稳定监测奠定了基础。

Based on the synchrophasor technology , Wide-Area Measurement System ( WAMS ) can supervise the dynamic operation of large-scale power systems , which overcomes the weaknesses of traditional SCADA and digital fault recorders .

利用这一模型，针对含有大型风电场的输电系统，对其静态电压稳定约束条件下的最大输电能力（TTC）展开研究。

Based on the proposed model , total transfer capability ( TTC ) of power system containing large-scale wind farms is investigated under the constraint condition of static voltage stability .

利用Hopf分歧理论对Hopf分歧特征的电力系统电压稳定特性进行了分析，并通过数值仿真方法，对Hopf分歧理论分析结果的正确性进行了非常直观的验证。

Analyzes the characteristics of voltage stability of electric power system with feature of Hopf bifurcation by the theory of Hopf bifurcation . Verifies visually the correctness of analysis results by numerical simulation method .

最后以SVC为例说明了建立考虑系统动态元件特性的静态电压稳定分析模型的方法。

Finally , this paper constructs SVC 's new model as an example , to illustrate the method of constructing the new static model of voltage stability analysis taking account of dynamic components of the system .

仿真结果表明运用模糊-PID复合控制能使PEMFC电池的输出电压稳定于期望值，其控制精度符合燃料电池的商业应用要求。

The simulation result shows that the output of PEMFC can be stabilized on the expectated value with the application of fuzzy-PID compound controller , and its control accuracy meets the commerce application requirement of fuel cell .

功率因素校正电路PFC有利于减小电源对电网的污染、提高输入功率因数，减少谐波对电网的污染，同时提供一电压稳定的母线；

The first stage , PFC , can increase the power factor of front end and simultaneously reduce the harmonic pollution brought by the power supply . Moreover , the steady DC voltage is obtained in this very stage .

通过IEEE算例系统关于最大输电能力和静态电压稳定的计算结果表明，该方法计算精度较高，同时与蒙特卡罗方法相比具有较小的计算量。

The analysis and computation results of total transfer capability and static voltage stability of IEEE test system shows that the proposed method maintains a high degree of accuracy and keeps low the computational burden when compared to the Monte Carlo method .

根据滑模变结构控制原理和方法，通过直接控制和间接控制两种途径，设计相应的控制器，实现了Buck变换器中的混沌控制，使输出电压稳定到期望值。

Using the theories and methods of sliding mode control , the variable structure controllers are designed to control chaos in DC-DC Buck converter by means of direct and indirect control . Some desired output voltages are obtained using this control method .