无功的

Voltage quality is one of main index that judge quality of power system electric energy, having merit compensation is construction of electrified wire netting and transformed main component.

概要： 电压质量是衡量电力系统电能质量的重要指标之一，无功补偿是电网建设和改造的重要组成部分。

This paper designs TCR TSC SVC controller based on non affined nonlinear model .

对由晶闸管控制电抗器型装置与多个晶闸管开关电容器型装置组成的静止无功补偿系统建立了一个新的非仿射非线性模型。

An improved genetic algorithm based on "approximative elite","study operator" and "chaos operator" has been presented in this paper according to the features of reactive power optimization in power system.

中文摘要：根据电力系统无功优化问题的特点，提出了一种基于近似最优个体、学习算子和浑沌算子的改进遗传算法。

The paper aim at the three-phase voltage source SPMW-inverter, which is applied in variable-speed wind turbines system, adopts the theory of nonlinear counterchange and nonlinear feedback, creates the three-phase voltage source PWM-inverter's nonlinear model, and deduces it's feedback linearization equation, consequently, the three-phase voltage source PWM-inverter active and reactive current decoupling control is proposed.

该文针对变速风力发电机组系统所用的三相电压型SPWM 逆变器，采用非线性变换和非线性反馈理论，建立了三相电压型 PWM 逆变器非线性数学模型，推导出其反馈线性化方程，从而得出三相电压型 PWM 逆变器有功电流和无功电流的解耦控制策略。

Those are measured and calculated by computer such as voltage, current, frequency, active power, reactive power and power factor. The errorless of three-phase voltage and current is less than 0.5 percent.

用微机实现对电网电压、电流、频率、有功功率、无功功率、功率因数的测量和计算；计算高压配电线路得出的三相电压、三相电流有效值误差小于0.5％。

No matter these parameter are wind- driven generation set is to be in meshy condition to still take off meshy condition to be monitored, use at judging status of the start condition of wind- driven generation set, job and breakdown situation, the power of have rendered great service that still is used at statistical wind-force generation set, without result power and total electricenergy production.

这一些系数不管力量发电机组是处在并网态势还是脱网态势都被检测，用在判定力量发电机组的起动因素、工作态势及毛病境況，还用在统算力量发电机组的有功码率、无功码率和总发电量。

On Power System Reactive Power Optimization of theses, the paper uses the improved tabu search algorithm.

详细说明：关于电力系统无功优化的学术论文，该论文中使用了改进的禁忌搜索算法。

This paper presents a new reactive power compens ator to reduce the negative and zero sequence components of load currents and to improve the load bus power factor of unbalanced three-phase three-wire and three-phase four-wire distribution feeders.

提出了一种用于补偿不对称负荷产生的负序、零序分量并调整负荷母线电压，且适用于三相三线制和三相四线制系统的新型无功补偿器。

Storage devices played an important role in MicroGrid control, the inverter of battery which used droop control could provide fast power support for the islanded MicroGrid, and damped the voltage and frequency fluctuation caused by the slow dynamical response of gas turbine efficiently.

采用下垂控制策略的蓄电池在微网孤岛运行时可以快速为系统提供有功、无功支撑，有效抑制了由于燃气轮机动态响应速度慢引起的电压和频率偏差。

A new method for islanding detection is presented, and the status of the islanding can be detected by the change of the frequency of the load voltage.

提出一种利用无功补偿技术进行并网发电系统孤岛检测的方法，通过对负载电压频率的判断即可有效检测是否进入孤岛状态。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。