电气英语论文翻译

1工作原理距离保护 Distance relays use voltages and currents acquired at the relay location to calculate the apparent impedance of the line from relay point to the fault point.距离继电器的使用电压和电流后天在接力的位置来计算的表观阻抗线中继站的故障点。 The calcu- lated apparent impedance Z is compared with the set- ting impedance Zset to decide whether the fault is inter- nal or external.的计算， lated明显阻抗Z是同一套婷阻抗Zset决定是否断层间的信号或外部。 During normal operation, the apparent impedance is generally larger than the Zset.在正常操作期间，明显的阻抗一般大于Zset 。 If the apparent impedance is less than Zset, then it is concluded that a fault has probably occurred in the protected line.如果明显阻抗小于Zset ，那么得出的结论是有可能发生故障的保护线。 Under fault conditions, the distance relay energizes the circuits to trip relevant circuit breakers to isolate the faulted line from the rest of the system[8].故障条件下，距离继电器的电路注入行有关断路器隔离断行的其余部分系统[ 8 ] 。 Fig.1 shows the working principle of distance protection.图1显示的工作原理，距离保护。 The startup element starts protection devices or fault calculating programs when fault occurs in the pro- tected line.启动元件启动保护装置或过失计算程序发生故障时，在亲tected线。 The measuring element, which is the center of distance protection, calculates the line impedance between the fault point and relay point.测量元素，这是中心的距离保护，计算线路阻抗之间的故障点和中继点。 The time delay element determines different time delays according to the result of the measuring element.的时间延迟因素确定不同的时间延迟根据测量结果的因素。 The output element executes the decision of protection.输出内容的决定，执行保护。 2 Configuration of simulation system 2配置的仿真系统 The dynamic simulation system for distance protec- tion proposed in this paper is designed according to its working principle and elementary configuration.动态仿真系统的距离保护法本文提出的目的是根据其工作原理和基本配置。 As shown in Fig.2, the simulation system is composed of electromagnetic transient computing module, PT & CT module, data reading module, U & I display module, startup module, Fourier algorithm module, phase selec- tion module, impedance computing module, impedance comparison module and so on.图2所示的仿真系统是由电磁暂态计算模块，印尼与CT模块，数据读取模块， ü ＆余显示模块，启动模块，傅氏算法模块，相选择法模块，阻抗计算模块，阻抗比较模块等。 In this closed-loop simu- lation, the relay trip signal is fed back to control the cir- cuit breaker of power system model.在这个闭环仿真，接力行程信号反馈给控制电路- cuit断路器的电力系统模型。 This closed-loop simulation approach has greatly enhanced the accuracy of simulation and made it possible to simulate the dynamic interactions between power systems and protection systems.这闭环模拟方法，大大提高模拟的准确性和使之能够模拟动态电力系统之间的相互作用和保护系统。 2.1 Fault transient computing based on PSB 2.1故障暂态计算的基础上公安局 The PSB was designed to provide a modern design tool that will allow users to rapidly and easily build models that simulate power systems.公安局的目的是提供一个现代化的设计工具，允许用户迅速，方便地建立模型，模拟电力系统。 The blockset uses the Simulink environment, allowing a model to be built using simple click and drag procedures.该模块利用Simulink环境下，允许的模式是采用简单的按一下并拖曳程序。 The libraries contain models of typical power equipment, such as transformers, lines, machines, and power electronics.该库包含型号的典型功耗设备，如变压器，线路，机器，电力电子技术。 These model's validity is based on the experience of the Power Systems Testing and Simulation Laboratory of Hydro-Québec, a large North American utility located in Canada.这些模型的有效性是基于经验，电力系统测试和模拟实验室水电魁北克，大型北美实用设在加拿大。 Matlab and its time domain solver Simulink create a friendly and open system.基于Matlab和Simulink的时域求解创建一个友好和开放的系统。 New models and libraries of power equipments may just be added to this package.新的模式和图书馆的电力设备可能会被添加到该程序包。 In this developing environment, we can finish all kinds of power system simulations[5—7]在此开发环境，我们可以完成各种各样的电力系统仿真[ 5-7 ]