电网

After a short-term load forecasting method based analogous and linear extrapolation is proposed, the load forecast and the priority of equipment action are led into static reactive power optimization. The aim function is constructed for the practical situation of power system. On the basis of traditional genetic algorithm the fitness function and the holding of population diversity are improved. The adjacent search operator is applied to improve ability of local search.

在提出基于相似日和线性外推的短期负荷预测新方法的基础上，将负荷预测和设备动作优先级引入静态无功优化中，并结合电网实际情况，构造了实用的目标函数，对遗传算法的适应度函数和群体多样性的保持进行了改进，采用邻域搜索算子增加遗传算法的局部寻优能力。

Storage battery is emergency power supply of DC operation electrical source system in electrical power system, whose good work state, is great important to operation of fixture. Because individual storage battery quickly abates due to dry, heat, polar plate lithification, weeping, lack charging, excessive discharging, internal resistance increasing, capability reduction, explosion etc., heavy accident of electric network impossible occur.

蓄电池是电力系统直流操作电源系统的后备电源，它的工作状态好坏，对于设备的运行至关重要，由于运行中个别蓄电池会因干涸发热、极板岩化、漏液、欠充、过放、内阻增大、容量降低、爆炸等原因而迅速失效，极有可能造成电网的重大事故。

An estimation and updating method for treating the typical daily load curve is proposed which makes full use of the existing data of distribution network and the accuracy of the results satisfies engineering requirements.

对于负荷曲线的处理提出了一种估算和修正的方法。这种估算负荷的方法充分利用了配电网现有的原始数据，其精度满足工程要求。

An effective method is developed to improve the economical operation of transformer by increasing the load power factor.

在此基础上，提出提高电网负荷功率因数，改善变压器经济运行状况的有效措施

For the voltage space vector close loop control-based strategy, based on the proportional-plus-integral-based control scheme, a new control scheme composed of an adaptive resonant controller and a PI controller is proposed in the paper, by which the stator voltage waving is almost elimited, and a very well control performance is achieved for stator voltages, naturally, the softly cut-in control is realized.

针对基于空间电压矢量闭环控制的这一投切方案，在PI调节器控制的基础上提出了自适应谐振调节器与PI调节器并行控制的控制策略，有效抑制了定子电压幅值的波动，使定子电压具有较好的控制响应，进而实现了双馈风力发电机零电流切入电网的目的。

Display the result and analyze the method of reduce loss in this system is related to graphics.

电网线损管理系统的计算结果的显示以及降损措施的分析都与图形相关。

Power distribution system reconfiguration is one of the major ways to network loss reduction and system reliability enhancement.

配电网络重构是降低网损、提高电网运行经济性和供电可靠性的主要途径之一。

The loss of the system can be reduced to minimum. A practical interconnected power system is simulated.

以上各种分析和控制方法都在试验电网中进行了应用性模拟计算，计算结果令人满意。

The reasons of low voltage in the electrical network, and harm to the electrical equipments are analyzed.

分析了电网中出现低电压的原因以及低电压运行对线路电气设备的危害，有针对性地提出了预防低电压运行的各种措施。

The paper gives a new idea that rapidly cut off the circuit at low-current time when power system has happened short circuit.

本文以发生短路故障的电网为研究对象，对其短路情况进行分析，并在此基础上着重研究了短路危害最为严重的三相对称短路。

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。