电网

Three-phase squirrel-cage induction motor in its structure is simple, cost-effective and of good work, and many other advantages, in today's industrial applications in various fields have a wide range of applications, but it is an obvious shortcomings, is the starting current too big ( General starter for the rated current of the current five to seven times or even greater), so regardless of the motor itself, or the power grid and other electrical equipment, will have a negative impact.

留学解答资讯网：三相鼠笼式异步电动机以其结构简单、性价比高和工作特性好等诸多优点，在当今工业应用的各个领域都有广泛的应用，但它有一明显缺点，就是起动电流过大(一般起动电流为额定电流的5～7倍甚至更大)，这样不论是对电动机本身，还是对电网以及其他电气设备，都会产生不利的影响。

Not only can effectively control the squirrel-cage three-phase asynchronous motor starting current, the current slowdown of the motor and the impact of power grids, and the structure is simple, reliable operation and lower costs for promotion, but also in the process of starting and running current detection, Voltage parameters, the abnormal processing, display and alarm, to achieve the comprehensive protection of the motor.

不仅能有效控制鼠笼式三相异步电动机起动电流，减缓电流对电动机和电网的冲击，且结构简单，运行可靠，成本较低，适合推广，还能在起动和运行过程检测电流、电压参数，对异常情况进行处理、显示及报警，实现对电动机的综合保护。就是以上的了，电气专业英语好的帮下忙，万分感谢

Based on the operating principle of thyristor voltage controller, the cause of phase current oscillation during soft starting with a voltage regulator, is analyzed.

引言 大中型电机在直接起动时会产生很大的冲击电流，这一方面会引起电机的发热损坏，另一方面会对供电电网产生严重影响。

An adaptive deadbeat control method in stationary reference frame for distribution level static synchronous compensator is proposed.

提出一种静止坐标系下配电网静止同步补偿器的自适应无差拍控制方法。

The modified particle swarm optimization is utilized to solve the proposed reactive power optimization model; and combining with non–stationary multi-stage assignment penalty function, the reactive power optimization problem is transferred into a problem to solve extreme-value without constraints, thus the calculation accuracy and global convergence ability of MPSO are effectively improved, and power grid company can achieve maximal economic benefit by means of the proposed algorithm.

应用改进粒子群优化算法求解该无功优化模型，并结合动态调整罚函数法将无功优化问题转化成无约束求极值问题，从而有效地提高了改进粒子群优化算法的全局收敛能力和计算精度，使电网公司取得了最大经济效益。

This paper presents a kind of voltage and reactive power control integral principle and concrete control strategy for 220KV three winding transformer step-down stations.

目前的控制策略一般使用九域图原理但其缺陷是容易产生分接头频繁调节。本文针对电网电压的枢纽站220KV三绕组降压变电站，提出了一种电压无功综合控制的总体原则和具体控制策略。

Frequency AC-DC rectifier first, and then the inverter for AC 50 Hz, the step-up transformer into the local electricity company 11 kV power grid.

变频交流电先整流成直流电，然后逆变为50Hz的交流电，经升压变压器送入当地电力公司的11kV电网。

With the fast development of power system and the stepwise realization of power market, the problem of large-scale power grids stability becomes more complicated.

随着电力系统的飞速发展和电力市场的逐步实现，大电网的稳定问题变得更加复杂。

This paper summarizes the characteristics and performance of super capacitors, analyzes the structure and control principles of the super capacitor energy storage system, and outlines its applications in microgrid.

概述了超级电容器的特征和性能，分析了超级电容器储能系统的结构和控制原理，并详细阐述了其在微电网中的应用。

The rural macro conditions and the data of stylebook counties is analysised.

尤其于1998年开始的全国性大规模农村电网建设与改造工程已经完成，开展此类项目的社会效益后评价更具必要性和实用性。

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。