电网

Article 11 The construction and retrofit planning of urban power networks shall be put into the overall urban planning.

第十一条城市电网的建设与改造规划，应当纳入城市总体规划。

The revised simplex method is used at first to calculate the optimal line extensions without integer constraints of the variables so that it can be determined which lines should be constructed.

第一步不考虑变量的整数约束，用修正单纯形法求解，由此可确定一部分线路是否需要建设。第二步在缩小的可选线路范围内进行整数规划计算，从而快速形成电网发展方案。

The paper consists of dynamic equivalent of province S network, simulation analysis by simulation software EMTDC, comparison between the simulation result and the graph of fault recorder, applying rotating vector method and resonance theory to analysis fault process, finally having arrived at the fault mechanism of wire-break resonance and asynchronous-ly switching process.

内容包括：对S省电网的动态等值，用仿真软件EMTDC进行仿真分析，将仿真结果和故障录波图做比较，用旋转向量的方法和谐振理论分析事故过程，从而得出了机电相互作用引起变压器中性点击穿和断线谐振导致避雷器爆炸的事故机理。

Imp roving the power quality for customers is one of the main purposes of research on smartgrid.

提高用户电能质量是当前智能电网研究的主要目标之一。

SANO intelligent servo transformer is a super-small size servo transformer, specifically developed for the non-compatibility voltage between the China Electrical and the alternating servo motor.

SANO三相智能型伺服变压器是专门针对中国电网与交流伺服电机所需电压不匹配而设计的超小体积三相伺服变压器。

Remnant magnetism is caused by dc component of primary current when external fault of power transformer is cleared and it is near to the saturation point of excitation curve of work point of transformer in this state.

近年来，西安地区相继发生了110kV皇城变，330kV聂流变等多起由于TA饱和引起的变压器差动保护误动事故，对电网的安全稳定运行造成了严重的影响。

With the continued development of the national economy, grid scale expands continuously.

随着国民经济的持续发展，电网规模在不断扩大。

The electric power data network must make sure that the electric power system has high security, stabilization and efficiency. The information of schedular automatization, electricity energy collection, water instance measure ,report and electricity network malfunction analysis requires very high security.

电力数据网必须保证电力系统安全、稳定、高效生产的需要，其中调度自动化信息、电能量采集信息、水情测报信息和电网故障的分析等信息的安全性要求极高。

According to the transformer's equivalent circuit, the value of the current injected to the transformer's secondary winding is controlled, so that the value of transformer impedance in power system can be controlled.

本方案将变压器的一次侧串联接入电网，在电力系统正常运行时，变压器主磁通为零，故障限流器呈现很小的变压器一次侧漏阻抗，压降很小，对电力系统运行无影响。

Combined with engineering practices, this article proposes that feeder section is regarded as graph, the nodes inside the section are treated as vertexes of graph, and the lines between nodes as arcs.

结合配电自动化的工程实际问题，提出将馈线区间作为一个图，并将区间内各节点作为图的顶点，节点间线段作为图的弧，以线路潮流的方向作为弧的方向，并由此建立了配电网馈线区间的数学模型。

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。