电网

Three design schemes of compensation currents for D-STATCOM in delta connection used for unbalanced load compensation are introduced.

介绍了用于不平衡负荷补偿的三相三角形连接的配电网静止同步补偿器中补偿电流的3种设计方案，即电纳补偿原理、最大相电流最小化设计和无零序设计方案。

However, the generator may be disconnected from the grid in case of a disturbance such as a voltage dip even a grid fault.

然而在运行过程中，由于各种原因引起的电网电压波动、跌落甚至短路故障会影响发电机的不间断运行。

Exchange power supply system including electrical network height power source, kerosene engine power set emergency power supply (long time emergency power supply), integral part's UPS power source; The cocurrent power supply system by the rectifier, the accumulator cell (short time emergency power supply), the direct-current converter as well as the corresponding power distribution cabinet is composed; The good earth and the antimine device, may improve the correspondence quality, guarantees the communication facility and operator's security.

交流供电系统包括电网高低电源、油机发电机组备用电源、重要部门的UPS电源；直流供电系统则由整流器、蓄电池、直流变换器以及相应的配电柜组成；良好的接地和防雷装置，可以提高通信质量，确保通信设备及操作人员的安全。

Comparing comprehensive ly the present various current converting circuits, it is proposed an design structure of direct-driven wind power generation current converting systems in megawatt level.

摘 要：在综合比较当前适合直驱型风力发电机组的各种变流电路的基础上[1~ 2]，提出了一种兆瓦级直驱型风力发电变流系统的设计结构，即采用不控整流+升压斩波+SPWM逆变的变流器将电机发出的电能转换为可接入电网的恒频恒压的交流电。

Combined with the nonlinear characteristics of wind turbines and the control strategy of generator-side converter and grid-side converter, used the design method for digital PI regulator, the back-to-back PWM converter on the wind-power system with direct-driven permanent magnet synchronous generator was built in the simulink of the MATLAB.

结合风力机的非线性特性和机侧变换器与网侧变换器的控制策略，应用数字PI调节器参数设计方法，在MATLAB/simulink仿真环境下构建了基于背靠背变换器的永磁直驱风力发电系统，系统包括风力机、永磁同步发电机、变频器、电网及其电气控制部分的数学模型，仿真结果表明风电系统的PI调节器参数设计合理且系统具有良好的运行特性。

In the process of switching operation of 220kV primary equipment,the switch of motor power source tripped suddenly,and then electric arc occurred between the moving contact and stationary contact of disconnecting switch.

对一起因220kV一次设备在倒闸操作过程中，电动机电源开关突然跳闸，致使隔离开关动、静触头之间产生电弧，危及电网和设备安全的这一危险情况进行了分析，找出危险根源，强调执行反事故措施的重要性。

In the ice calamity accident of power grid on beginning of 2008,the common condition in the accident of transmission line was the ice loading on earth wire fittings and insulators.

在2008年初的电网冰灾事故中，导地线金具和绝缘子覆冰掉串是输电线路事故中常见的情况。

Later, electric lighting was installed and hooked into the camp's electrical grid.

同时还安装了电动照明系统并将之接入了营地的电网中。

With the transformation of power grids in recent years, the various scenic spots in electric lighting more convenient, has great potential for development.

随着近几年电网的改造，各景点电力照明比较方便，具有极大的开发潜力。

In the power station the nuclear fuels are completely burnt without some long-lived radioactive wastes both of heaVy actinide and fission products.

核电站将20％电能供给加速器运转，80％电能并入电网。同时电站还可输出十分稀有的稳定同位素和短寿命医用同位素，作为副产品供应市场。

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。