电力专业英语翻译(第2版).doc

A decrease in the field current gives rise to lagging (inductive) current in the stator; and increase in the field current that overexcites the motor causes a leading (capacitive) current to appear in the stator. 励磁电流减小时，定子电流感性增强；励磁电流增加使电机过励时将在定子中产生容性电流。 An induction machine is an AC two-winding unit in which only one (primary, usually the stator) winding is supplied with an alternating current at a constant frequency 1 from an external source. 感应电机是一种具有双绕组的交流电气设备，它只有一个绕组（一次侧，通常是定子）通过外电源输入固定频率为1的交变电流。 Current transformers for protection are essentially similar to those used for the operation of ammeters, watthourmeters and other instruments. 保护用电流互感器基本上同操作用的电流表、电能表和其他仪器类似。 DG planning also involves arranging for connection of the renewable power generator with the local grid, and for support of any local electric load when the renewable source is not available. 分布式发电规划还包括安排可再生能源发电机与地方电网相连接，这样当可再生能源不可用时，本地电力负荷仍能得到支持。 Distributed generation can include renewable power generation resources such as wind, solar, or low-head hydropower production. 分布式发电可以包括可再生发电资源，例如风能、太阳能或低水头水力发电。 Distributed generation, or DG, includes the application of small generators, typically ranging in capacity from 15 kW to 10000 kW, scattered throughout a power system, to provide the electric power needed by electrical consumers. 分布式发电包括小型发电机组的应用，容量通常从15kW到10000kW不等，这些机组散布在整个电力系统中，为用户提供所需的电能。 Each single thyristor valve consists of a certain amount of series connected thyristors with their auxiliary circuits. 晶闸管阀由一定数量的串联晶闸管及其附属电路组成。 Each single valve in the converter bridge is built up with a certain number of series-connected IGBTs together with their auxiliary electronics. 换流器桥阀由一定数量的串联IGBT（绝缘栅门极晶体管）及其附属电路构成。 Electric power is produced at generating stations (GS) and transmitted to consumers through a complex network of individual components, including transmission lines, transformers, and switching devices. 电能由发电厂发出，然后通过由诸如输电线路、变压器、开关设备这些独立部件组成的复杂网络输送到用户。 However, the sin