分析负荷模型对多馈入交直流系统功角稳定性的影响。
The influences of load models on transient stability of a multi-infeed DC and AC system are analyzed at length.
说明：半定规划内点法数据整理交直流系统统一无功优化算法，系数矩阵的确定。
Interior point method for semidefinite programming data collation ac and DC systems unified reactive power optimization algorithm to determine the coefficient matrix.
基于连续潮流法和原始一对偶内点法，提出了一种新的分段求解交直流系统负荷裕度方法。
A new segment solution for solving load margin of AC/DC power system is proposed in this paper based on continuation method and interior point algorithm.
由于传统短路比不能考虑直流间的相互作用而亟待提出适用于多馈入交直流系统的短路比定义。
Because the traditional short circuit ratio(SCR) is not able to reflect the interaction of HVDCs into account, it is urgent to propose a new definition of SCR for MIDC systems.
仿真结果表明，非线性变结构控制可以有效地调节直流线路的传输功率，保证交直流系统的稳定性。
The result indicates the nonlinear variable structure control can adjust the transmission power of DC line effectively, and assure the stability of the AC-DC system.
本文基于一种图形数据一体化的维护方式，采用面向对象技术，实现了一个适用于交直流系统的维护系统。
Based on a graph-model-database integration maintenance mode, with object-oriented technology, a maintenance system applied in the AC and DC system is developed in this thesis.
在本文第五章中，为了提高多馈入交直流系统的暂态稳定性，提出一种直流非线性变结构附加功率调制器。
In chapter 5, to improve transient stability of multi-infeed HVDC transmission systems, a kind of HVDC additional power modulator based on nonlinear variable structure theory is proposed.
讨论了目前研究交、直流混合电网交直流系统相互作用时在直流建模上存在的模型过度简化及模型选用不恰当的问题；
The problem of oversimplification and improper selection of DC model, which exists in the DC modeling when AC and DC systems interact in AC/DC hybrid power system, is discussed.
与弱交流系统相连的高压直流系统被认为是引起电压不稳定的一个因素，评价交直流系统电压稳定性的方法相当复杂。
The high voltage direct current (HVDC) system connected with weak AC system is considered to be one of the causes for voltage instability.
最后对含hvdc线路的发输电系统进行了充裕度评估，研究了网损、电压及HVDC系统元件备用等因素对交直流系统可靠性指标的影响。
The adequacy estimation of power system with HVDC is investigated, including the effect of network loss and voltage, as well as the component backup of HVDC system on system reliability indices.
综合分析了近些年来关于多端交直流系统（AC/MT DC）状态估计的算法，并提出了一种AC/MTDC状态估计分析的新算法———改进交替求解法。
This paper reports the development of a novel and effective approach in AC/MTDC (Multi terminal DC) power system state estimation, called improved sequential method.
文章论述了智能站用电源交直流一体化系统组成、网络结构及技术特点。
This paper discussed the constitute, net frame and major technical specialty of AC/DC integrative system of substation's power source.
并以多台ept交直流母线混合并联系统为基础分析了并联ept的输入级控制策略。
And the load sharing control of the input stage is also analyzed by the AC and DC hybrid parallel system with several EPTs.
本文主要进行交直流联合系统静态电压稳定性的研究。
This paper researches on the static stability of the AC/DC power system.
采用特征值分析法研究交直流电力系统中HVDC换流器控制对次同步振荡（SSO）模态阻尼的影响。
The influence of HVDC converter controls on the mode damping of sub-synchronous oscillations (SSO) in a AC/DC power system is investigated in this paper by using eigenvalue analytical method.
分析表明这种控制方法提高了交直流输电系统的稳定性及控制系统的鲁棒性。
Analytical results show that using the presented method the robustness of control system and the stability of AC power transmission system are improved.
系统设计内容包含了交直流电气传动控制系统，柴油发电机组控制系统。
The system design content includes the AC-DC electric drive control system, diesel generator set control system.
提出了一种针对交直流并联输电系统的非线性变结构控制方法。
This paper brings forward a nonlinear variable structure controller for the system of AC paralleled with DC.
在基于电压源换流器的高压直流输电(VSC -HVDC)交直流混合风电场并网系统中，控制VSC - HVDC送端站注入到PC C点的无功功率可以抑制电压波动。
In hybrid wind farm integration system based on HVDC of voltage source converter (VSC-HVDC), the voltage fluctuation can be alleviated by compensating reactive power to PCC from VSC-HVDC sending end.
当交流系统发生三相不对称故障时，忽略直流系统负序分量的准稳态模型将给交直流混合系统的仿真带来较大的误差。
The QSS (Quasi Steady State) model of converter which neglects the negative impedance of DC system will bring some errors when unbalanced fault occurs in AC system.
研究表明，信号调制型SVC综合非线性控制器，能够给系统提供较强的阻尼，从而提高了整个交直流混合系统的暂态稳定性。
The results show that the signal-modulating type synthetical nonlinear SVC controller can provide higher damping to the system, so as to enhance the transient stability of the AC and DC hybrid system.
设计了应用于交直流互联电力系统的直流功率调制的非线性鲁棒自适应控制器。
The robust adaptive control law is proposed for a HVDC power modulation controller of the interconnected AC/DC power system.
大规模交直流混合输电系统的出现使得经典的电力系统稳定性分析理论受到了局限。
The classical stability analysis theory is limitary to deal with bulk AC-DC hybrid transmission system.
对大规模交直流网络下的高压直流控制保护系统进行参数优化设计，是保证灵活交流输电系统暂态性和稳定性良好的重要手段。
The optimal design of HVDC control and protection parameters in the case of large-scale ac and DC power system network is a valid measure to ensure achieving good transient and stable performance.
本文提出一种高压交直流并联系统的无功校正安全分析方法。
A method of reactive power security control in high voltage AC / DC hibrid systems is presented in this paper.
直流功率调制器可以对交直流联络线进行局部控制或改善交直流混合系统的运行特性。
The current controller on the HVDC line can do AC/DC parallel tie-line local control or improve the stability of AC/DC hybrid power systems.
模糊控制已在交直流调速系统和伺服系统中取得了满意的效果。
The fuzzy control already has obtained the satisfactory effect in the alternating and direct velocity modulation system and the servo system.
算例分析表明，该算法能方便地计算交直流混合系统在最恶化负荷增长方向下的负荷功率裕度。
The test results show that the closest critical load margin can be easily calculated using CCLP algorithm.
算例分析表明，该算法能方便地计算交直流混合系统在最恶化负荷增长方向下的负荷功率裕度。
The test results show that the closest critical load margin can be easily calculated using CCLP algorithm.
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