电网

Firstly,this paper analyses the operation in theory,it sets up the mathematical model of doubly fed induction generator two-phase rotating coordinate system according to the coordinate transformation theory.

本文以电压波动的工况为出发点，根据坐标变换理论建立了双馈异步发电机在两相旋转坐标系下的数学模型，同时考虑在电网电压不平衡扰动工况下，对此模型进行了进一步的修正。

He was also convicted of buying maps of the electricity grid in order to plan his strikes, which carried a 15-year maximum jail term.

他还被判犯有为计划袭击而购买电网地图的罪行，执行最高15年的监禁。

The second part is discusses the design of the digital megohm meter based on single chip processor in the aspects of both hardware and software.

其次，基于低压配电网绝缘检测的实际需求，本课题研制的一种基于单片机的数字兆欧表，论文从软硬件两方面对其工作原理和性能作了详细的说明。

According to the structure feature of the weakly meshed distribution network, a new three-phase power flow method based on the superposition principle is proposed in this paper.

针对少环配电网络的结构特点，提出了一种基于叠加原理求解少环配电网三相潮流的新方法。

For this purpose, the minimum modulus eigenvalue of power flow Jacobian matrix of AC/DC power system is researched; by means of the sensitivity index of nodal voltage to reactive power variation and combining with participating factor, the bus or region where the voltage instability could happen most possibly are judged to provide decision-making foundation for the configuration of reactive power compensation device in power system.

该方法研究了交直流系统潮流方程雅可比矩阵的最小模特征值，以节点电压对无功功率变化的灵敏度为指标，结合参与因子，判断全电网中最有可能发生电压不稳定的节点或者区域，从而为系统无功功率补偿装置的配置提供决策依据。

The authors research the algorithm for power system static voltage stability. Taking the modulus minimum eigenvalue of power flow Jacobian matrix as the criteria to weigh the weakness of power system, the active power injected into nodes equivalent is substituted by equivalent conductance to ground as well as the reactive power injected into nodes is substituted by equivalent susceptance to ground.

研究了电力系统静态电压稳定性算法，以潮流雅可比矩阵最小模特征值的大小作为衡量电网薄弱程度的标准，以等效对地电导代替节点注入有功功率，以等效对地电纳来代替节点注入无功功率。

Grid parity (where solar costs the same per kilowatt hour as conventional electricity) is a term often used in green energy circles, most often in the form of misty-eyed dreaming. Suddenly, it's just over the horizon five years in some European markets, say experts.

电网平价（在相同的太阳能电池的成本每千瓦小时常规电力）一词经常以最频繁的形式出现在绿色能源界，专家指出，突然间，它只是五年来在一些欧洲市场地平线。

With development of power electronic technology, power converters have been used widely in switching power supply, motor-driven an...

随着电力电子技术的发展，功率变换器在开关电源、电机驱动控制、电网的无功补偿和谐波治理等领域得到广泛的应用。

With development of power electronic technology, power converters have been used widely in switching power supply, motor-driven and controlled, compensate of transmission-line system of electric power and harmonious wave manage.

随着电力电子技术的发展，功率变换器在开关电源、电机驱动控制、电网的无功补偿和谐波治理等领域得到广泛的应用。

This paper proposes an algorithm for solving a problem of multi-stage distribution substations expansion.

提出了一种城市电网规划中多阶段变电站规划优化的新算法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。