无功的

The model of reactive power optimization concerning voltage stability margin is presented based the theory of the bifurcation.

其核心功能模块是电力系统的无功优化和电压稳定分析。

I felt chagrined at the wasted effort.

我非常懊恼这次的无功而为。

In the paper, the elementary principle of the Compensator and the assembly process is explained in detail.

本文对该无功补偿装置的软硬件基本原理及安装调试方法进行了介绍。

Application of static var compensator is one of the effective ways to improve power system stability and achieved some results.

应用静止无功补偿器是提高电力系统稳定性的有效措施之一，并取得了一些成果。

Dynamic reactive power optimization model is established in this study.

建立了动态无功优化数学模型，提出用遗传算法对负荷曲线进行优化分段的方法。

The paper studies the mathematical model of the dynamic reactive optimization and the particle swarm optimization.

论文研究了动态无功优化的数学模型和粒子群优化算法。

Therefore, optimal design for SVC ,which insuresSVC operation security and economization , becomes research hotspot.

在设计阶段确保静止无功补偿系统安全可靠经济运行，成为SVC工程设计的研究热点。

According to the different compensating objects, two specific methods of detecting reactive current are put forward.

显然，谐波与无功补偿效果与有源电力滤波系统所采用的电流检测方法有关。

We choose the TMS320VC5402, digital signal processor, as the computing unit, filtering the sampled signal, truncating the harmonic whose frequence greater than 2500hz, then we use the window-interpolation FFT algorithm to get the refined frequence, amplitude, phase of harmonic in sampled voltage and current, other parameter such as harmonic ratio, active power, reactive power, power factor, three-phase unbalance can be also computed base one the result of window-interpolation FFT.

选用TMS320VC5402高速数字信号处理器作为运算单元，先对采样信号进行数字滤波，去除50次以上谐波分量，然后应用加窗双峰插值FFT算法计算电压电流的各次谐波频率、幅值和相位，以及谐波含有率、有功功率、无功功率、三相不平衡度等各项电能指标，同时利用锁相环电路硬件跟踪电网频率以减小采样失步度。

Several methods of measuring harmonic and reactive power current are introduced and compared in this paper.

本文介绍了常用的几种谐波和无功电流检测方法，并进行了比较。

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％。