通过对传统直接功率控制的分析，推导出一个新的开关表，可以显著地改进PWM整流器的无功功率控制性能。
Through analysis of classical DPC, a new switch table can be deduced which promote the efficiency of reactive power control of PWM rectifier.
其中导致停电的一个主要的原因就是无功功率失去了控制。
One of the reason leading to a blackout is reactive power that went out of the control.
电压控制和无功功率的控制是分不开的。
本论文提出三相并联型有源滤波器的两种新的控制方法，即正弦波化控制和瞬时无功功率的控制方法。
In this paper, we propose and discuss two new control methods for three phase shunt APFs: the sinusoidal line current control method and the instantaneous reactive power compensation control method.
其次，论文还介绍了瞬时无功功率理论及其在无功控制和无功检测方面的应用。
Secondly, the instantaneous reactive power theory and it 's application to reactive power control and detection are introduced.
所以，现代电力系统中的无功功率与电压控制是一个非常重要的问题，需要很好地解决。
So reactive power and voltage control in modern power system is a very important problem that need to solve well.
该控制方法能改善系统电能质量的调节，有效地补偿负荷侧谐波电流、无功功率和负序电流。
This control principle can improve the control of power quality and effectively compensate the harmonic currents at load side, reactive power and negative sequence current.
提出了一种异步电机无速度传感器矢量控制的新方法，用瞬时无功功率和励磁电流变化来估计电机转速。
This paper proposes a new method of sensorless vector control for induction motors, in which the motor speed is estimated by both instantaneous reactive power and variation of magnetizing current.
双馈发电机的有功和无功功率的解耦控制是变速恒频（VSCF）风力发电系统的关键技术。
The decoupled control of active power and reactive power is a key technology of variable speed constant frequency (VSCF) wind energy generation system.
论述了运用PWM整流器实现无功功率补偿的ML变频系统的工作原理、电路结构和控制的实现方法。
The work principle, circuit structure and realization method of control of the ML frequency converter system are discussed. The system USES PWM rectifier to realize reactive power compensation.
为了解决电力电子装置的谐波和无功功率污染问题，近些年来国内外学者提出了很多控制方案。
To solve problem of harmonics and reactive power compensation, researchers have proposed many control strategies in recent years.
文中将无功功率作为OPF的控制变量，故节点电压也被优化以得到最大传输容量。
Since the reactive power generation is taken as a control variable in the OPF formulation, the bus voltages can be optimized to yield maximum TTC.
工控机完成有功功率、无功功率以及功率因数的计算，并查询模糊控制表，给出控制量。
The host computer finishes the calculation of active power, reactive power and power factor, inquire fuzzy form of controlling , give and publish the controlling amount.
介绍了低压配电网无功功率自动补偿控制器的软件和硬件设计方法。
Hardware and software design of reactive power automatic compensation controller for low-voltage distribution systems is introduced.
高精度智能无功功率补偿器是采用相关理论的算法和PIC微控制器实现的一种控制器。
Passive power compensator with high precision and intelligence is a controller, which is accomplished by the algorithm of relative theory and PIC microcontroller.
对一些无功变化迅速的负荷，则给出直接以无功功率做控制量的简单模型。
And introduced the simple model direct on reactive power to some load where the reactive power changed rapidly.
统一潮流控制器(UPFC)可以有效控制线路的有功和无功功率。
UPFC (Unified power Flow Controller) is always used to control the active and reactive power of transmission lines.
文章主要介绍了静、动态补偿装置，其功率因数控制方式、无功功率（无功电流）控制方式、性能及应用场合。
This paper mainly introduces the power factor control method, reactive power(reactive current) control method, the performance and the applications of the dynamic & static compensation equipment.
应用连续变量线性反馈对一类由负荷无功功率变化引起的电压崩溃进行控制，仅用单个变量即可实现。
This paper applies a method of linear continuous variable feedback to the control of a kind of voltage collapses induced by reactive power changes, which only USES a single variable to feed back.
本文通过分析无功功率平衡和电压水平的关系，指出了电力系统电压调整的复杂性，然后讨论了变电站电压无功控制的原理，给出了控制的数学模型。
In this paper the complexity of voltage control in power system is discussed through the analysis of relationship between power system balanced states of voltage and reactive power.
在风电场混合并网系统中，通过电压源换相高压直流输电可以控制系统中的无功功率、抑制并网公共点的电压波动。
In interconnected hybrid wind farm system, the voltage fluctuation can be alleviated and the reactive power can be controlled by voltage source converter.
基于对电机输入瞬时有功无功功率的分析，提出一种新的永磁同步电机瞬时功率控制方案。
Based on instantaneous power analysis, an instantaneous power control method of permanent magnet synchronous machine (PMSM) is proposed in this paper.
介绍了以8098单片机为核心的无功功率补偿控制器的硬件结构及软件设计。
This paper presents the hardware and software designs of a Var compen-satlon controller based on the 8098 microprocessor.
控制系统可以单独控制电机的转速和无功功率，使其工作在超同步、亚同步、转子电流量最小和全补偿工作方式下。
The machine can be operated in sub-synchronous, super-synchronous speeds, minimum rotor current and full compensation when adjusting the speed and reactive power independently.
本文研究分析了转差频率型矢量控制和基于无功功率的无速度传感器矢量控制。
In this thesis, a slid frequency vector control system and a speed sensorless vector control system based on reactive power are investigated and analyzed.
仿真结果表明，该动态模型能够预测输出电压。响应曲线显示出自适应模糊控制算法能够较好控制燃料电池有功和无功功率的输出。
The response curves indicate that the adaptive fuzzy control is able to control the active output power and the reactive output power of the fuel cell.
该方法基于空间电压矢量调制，实现了动态过程中有功功率和无功功率的解耦控制。
Space vector modulation (SVM) is applied to the scheme, and decoupling control for the active and reactive power during the dynamic course is realized.
介绍了一种在静止无功功率补偿(SVC)控制中精确跟踪功率因数参据量的方法。
A new method of accurately setting reference values of power factor in the control of static var compensation (SVC) is introduced.
本文针对三相不平衡负载特点，介绍了无功功率补偿原理和单板机控制系统。
In accordance with the feature of three phase unbalanced loads, this article describes the correction principle of reactive power and the control system of single board computer.
本文针对三相不平衡负载特点，介绍了无功功率补偿原理和单板机控制系统。
In accordance with the feature of three phase unbalanced loads, this article describes the correction principle of reactive power and the control system of single board computer.
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