单机无穷大系统暂态稳定性的仿真与计算【说明书论文开题报告外文翻译】
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单机无穷大系统暂态稳定性的仿真与计算【说明书论文开题报告外文翻译】,单机,无穷大,系统,稳定性,仿真,计算,说明书,仿单,论文,开题,报告,讲演,呈文,外文,翻译
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1译文题目： 单机无穷大系统暂态稳定性的仿真与计算ABSTRACTPower system is a complex dynamic system, the system stability problem, once appear, may occur in a relatively short period of time serious consequences. With the rapid development of power industry, an increasingly large scale and complex power system, all kinds of fault, the will to power plants and users, and the safety of the electric field of power equipment a threat, and is likely to lead to the expansion of power system accident, especially under the background of large area network of electric power system fault will have great economic and social loss, thus ensuring the safe and stable operation of power system is the top priority of the electric power production. Electricity experiment was carried out directly from technology and safety considerations possibility is very small, pressing for electric power simulation are used to solve these problems, In this paper, the transient stability simulation analysis, the simulation results show that the failure to remove the shorter the time, the greater the generator damping, the easier system stability.With the rapid development of electric power industry, electric power system, as an increasingly large scale and complicated power system fault, The user will give power plants and power equipment of the security threats, and may have caused the accident of power system, technology and safety considerations from directly power test possibility, urged using electric simulation to solve these problems based on grid power supply system, Therefore, paper depend on the model of dynamic simulation by MATLAB build software Simulink infinite power system of single - simulation model, the grid in various fault may meet the needs of the running of aspects.1. the power system transient stabilityTransient stability refers to the power system in a certain operating conditions, 2after a large disturbance can reach a new steady state after a transient process running status or return to its original state. Is often encountered in the operation of the power system in various sudden disturbance, these disturbances in power system transient process, may be large changes in operating parameters. The transient process of the operation parameter changes may cause harm to the system. Fault cause is much bigger than the normal current of short circuit current and its heat effect may damage the equipment, but also changed the network structure, fault which changes the output power of the generator, and cause imbalance of each generator power input and output power, which may cause generating set out of sync with each other. Therefore, you must analyze the transient process of power system research, in order to ensure the safe operation of power system.electromagnetic transient fault current and voltage in the grid after the change, in general ABU can regardless of the generating set between the change of displacement, this is because the mechanical movement process much more slowly than the electromagnetic process. Electromechanical transient (stability) is focused on analyzing the motion law of the generator rotor. If the system after a large disturbance is not able to establish a steady running state, but a generator set has been a relative motion, relative Angle changing, and the power, voltage and current are constantly of system oscillation, so that the whole system can no longer continue movement, and it is called a system under this operation cant maintain transient stability.Power system simulation is based on the test of power system model, the research of the existence of a or in the design of power system, it was similar with control theory, system theory, the principle and the basis of the information technology, with computer and special physical devices (simulated during the real world environment) for l, by means of the system model to the actual or expected power system for dynamic experimental study of a comprehensive technology. Is often encountered in the operation of the power system in all kinds of disturbances, some disturbance power system in transient process, makes the running parameters have larger changes. In the transient process of the operation parameter changes may cause harm to the system, so you need with the help of a power system model to study 3the current and planning design of power system dynamic behavior in the transient process. Transient stabilityThe simulation includes the following several aspects: (1) model; (2) tests or mathematical modeling to simulate the equation of calculation; (3) to analyze the simulation results and improve the simulation accuracy.keywords： Singleinfinite；SimPowerSyetem； Short circuit faults；Wavelet transform2.MATLABMatlab is the large software developed by the American Mathworks company, it is based on the matrix, the calculation and visualization, program design fusion in an interactive work environment, in this environment can realize engineering calculation, algorithm research, modeling and simulation, application development, etc. The application of Matlab in power system modeling and simulation is mainly composed of power system simulation module (PowerSystemBlockset, PSB) to complete, PSB is developed by TEQSIM company and Quebec hydropower station. PSB is in the Simulink environment using the module, the variable step integral method, the nonlinear, rigid and discontinuous system can be accurate simulation, and accurately detect the breakpoints and switch time, PSB library contains on behalf of the general parts and equipment in the power network of Simulink block, by PSB can quickly build model, and simulation. PSB block library of measurement procedures and control source connection between electrical signal and Simulink program.Simpowersystems including the circuit of every element model for the simulation. Including power supply module, basic circuit module, power electronic module, motor module, wire connector module, test module, and additional power module of 7 kinds of module library.Each module library contains various basic element model, such as power supply module with dc voltage, current source, ac voltage source and current source, a controlled voltage source and current source five power model. Power electronic 4module library contains the ideal switch element, thyristor, power field effect tube, can turn off thyristor power switch element model; Motor module library includes a variety of models, such as asynchronous motor, synchronous motor, permanent magnet synchronous motor, etc. Only components of module will drag Simulink window, through the parameter Settings, dialog box set parameters can realize the simulation of circuit and power system.Conclusion:1) the PSB Matlab7.0 is a specially used in power system dynamic simulation toolkit, element models of power system is quite rich, users can also use the Matlab itself some of the tools to create a custom model. Using the powerful calculation function of Matlab and programming technology, can improve the flexibility and efficiency of the simulation calculation, for the simulation of power system, the analysis of power system provides a new means.2) when changing the parameters of the component itself, such as short circuit fault type, power of the motor, the stator and rotor resistance, inductance, the power load, the capacity of transformer, etc., can realize the operation process simulation analysis of power system under different working conditions, easy to compare different parameters and load conditions.3) using Matlab power system with which to power flow calculation, stability analysis, the design of the new element and determination, is open and flexible, intuitive, interactive, etc.4) due to the processing PowerSystemBlockset simplifies the switch element, that is an ideal model, to improve the simulation speed, simplify the circuit diagram design at the same time, the transient process of the system description are accurate enough.5文摘电力系统是一个复杂的动态系统，系统一旦出现稳定性问题，可能会在较短的时间内发生严重的后果。随着电力工业的迅速发展，电力系统的规模日益庞大和复杂，出现的各种故障，会给发电厂以及用户和电场内的多种动力设备的安全带来威胁，并有可能导致电力系统事故的扩大，尤其大区域联网背景下的电力系统故障将会给经济、社会造成重大损失，因此保证电力系统安全稳定运行是电力生产的首要任务。从技术和安全上考虑直接进行电力试验可能性很小，迫切要求运用电力仿真来解决这些问题，本文暂态稳定性进行仿真分析，仿真结果表明：故障切除时间越短，发电机阻尼越大，系统越容易稳定。电力工业的快速发展,电力系统作为一个日益大规模和复杂的系统,电力系统故障会给发电厂和电力设备的安全带来威胁,并可能导致电力系统事故的技术和安全考虑直接功率测试的可能性,促使电动仿真基于电网供电系统解决这些问题,因此,取决于模型的动态仿真软件仿真软件 MATLAB 建立无限的电力系统单 仿真模型,在不同故障可能满足运行方面的需要。1.电力系统暂态稳定性暂态稳定是指电力系统在某个运行环境下受到大的扰动后,能否经过暂态过程达到新的稳态运行状态或者恢复到原来的状态。电力系统在运行中常常受到各种突然的扰动,这些扰动使电力系统处在暂态过程中,此时运行参量可能发生较大的变化。暂态过程中运行参量的变化可能会造成对系统的危害。短路故障引起比正常电流大得多的短路电流,其热效应可能损坏设备,而且短路故障改变了网络结构,从而改变了发电机的输出功率,造成各发电机输入功率和输出功率的不平衡,有可能引起发电机组互相失去同步。因此,必须对电力系统的各种暂态过程进行分析研究,以确保电力系统的安全运行。电力系统暂态主要研究交流电力系统发生大扰动故障后的电磁暂态和电力系统受到各种扰动后的机电暂态过程。研究电磁暂态的重点在于分析短路故障后电网中的电流、电压的变化,在一般情况卜可以不计发电机组间位移的变化,这是因为机械运动过程远比电磁过程慢得多。机电暂态(稳定问题)的重点在于分析发电机转子运动规律。如果系6统受到大的扰动后不能再建立稳态运行状态,而是发电机组一直有相对运动,相对角不断变化,因而系统的功率、电压、电流都不断振荡,以致整个系统不能再继续运动下去,则称为系统在这种运行情况下不能保持暂态稳定。电力系统仿真就是通过对电力系统模型的试验,研究一个存在的或设计中的电力系统,它以控制论、系统论、相似原理和信息技术为基础,以计算机和专用物理设备(模拟再现真实世界环境)为 l 具,借助系统模型对实际或设想的电力系统进行动态试验研究的一门综合技术。电力系统在运行中常常受到各种扰动,有些扰动使电力系统处于暂态过程之中,使得运行参量有较大的变化。暂态过程中运行参量的变化可能会造成对系统的危害,因此需要借助电力系统模型来研究当前的和规划设计中电力系统在暂态过程中的动力学行为。暂态稳定仿真包含以下几方面的内容:（1）建立模型;(2)进行模拟试验或者数学模拟方程的计算;(3)对仿真结果进行分析并提高仿真精度。2.MTLABMatlab 是由美国 Mathwo
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