【作者】 张智；

【导师】 李林川；

【作者基本信息】 天津大学 ， 电力系统及其自动化， 2005， 硕士

【摘要】 并联无功补偿是调整电力系统电压的常用措施。现代静止无功发生器(Static Var Compensator)将电力电子元件引入传统的静止并联无功补偿装置,从而实现了补偿的快速和连续平滑调解。建立尽可能精确的被控对象模型,是实现先进控制策略以获得高质量控制效果的前提。本文在目前现有的PID控制调节的TCR-TSC型SVC的数学模型基础上,提出了在电力系统电磁暂态数字仿真中利用BP神经网络精确的寻找PID控制系统参数(Kp、Ki、Kd)的TCR-TSC型SVC的数学模型,并将该模型运用于电力系统电磁暂态数字仿真中。该模型将PID控制参数通过BP神经网络寻优,通过大量训练学习、最终找到适合的PID控制参数,并应用受控源原理和修正后的阻尼梯形法推导出了对应的综合友模,易于在暂态仿真中建立节点电压方程。由于精确考虑了神经网络、PID控制系统以及SVC之间的联系,使得在电力系统潮流计算中以及电磁暂态故障仿真中SVC对节点电压的支持和影响变得直接而准确。经过对实验系统各种故障下的仿真计算和华东500kV电网的仿真计算,证明该模型是正确的。本文实现了仿真计算软件与BPA、PSS/E电力系统计算软件之间的接口。对于一个已经使用了BPA软件和PSS/E软件计算了的电力系统网络,能够自动利用这两方面的网络等值参数进行网络电磁暂态仿真计算。大大提高了工作效率。仿真结果按照IEEE的COMTRADE通用格式进行输出,便于工程应用和与其他电力系统仿真软件兼容。更多还原

【Abstract】 The quantity of power system voltage is much more relate with distribution of power system reactive load. Static Var Compensator is widely used in now power system to support node voltage and adjust system reactive load distribution for its high performance and lower price. However, There are rarely models of SVC including its control system used to electromagnetic transient simulation in most simulation software. It is important to base on a accurate SVC model to achieve a control system. On this paper, a new TCR-TSC SVC simulation model with nonlinear PID controller which use BP network to find its exact controlling parameter Kp,Ki,Kd is presented in the simulation of power system electromagnetic transient process. Because full considering the relationship between BP network, PID controller and SVC model, the support of SVC to the node voltage and the influence to the power system of SVC are expressed directly and exactly during power system flow calculation and power system electromagnetic transient simulation. It is proved correct on the condition of EastChina 500KV network system fault and each fault under lab system. This paper has competed interfaces between the Simulation software and BPA or PSS/e electrical network calculation software. So it can improve work efficiency by automatic using the data that BPA produces power flow results and that PSS/E software produces equivalence parameters of a network. Further, the simulation software output the simulated current data and voltage data in all kinds of system faults by a general COMTRADE format. So these all benefit the engineering appliance and compatible with other power system simulation softwares.更多还原