该文从如何减小通信网络的影响角度,提出了实现电力系统广域PSS闭环控制架构,具有与数据上行通道结合的控制下行通道,控制终端可同步授时以实现同步控制及闭环时延补偿,实现远方信号反馈及广域协调控制。在此基础上结合应用环境实现了...该文从如何减小通信网络的影响角度,提出了实现电力系统广域PSS闭环控制架构,具有与数据上行通道结合的控制下行通道,控制终端可同步授时以实现同步控制及闭环时延补偿,实现远方信号反馈及广域协调控制。在此基础上结合应用环境实现了贵州电网的广域电力系统稳定器PSS(power system stabilizer)闭环控制系统。并阐述了广域阻尼闭环控制系统的关键技术,设计了控制下行通道的通信规约。该文最后对该架构进行了RTDS硬件闭环测试,测试结果表明,该架构可有效实现广域PSS闭环控制。展开更多
广域电力系统稳定器(Wide Area Power System Stabilizer,WAPSS)对电力系统的区间低频振荡能够起到良好的阻尼作用。同时,WAPSS参数的协调优化设计能够避免因增大某一振荡模式的阻尼而造成其他模式阻尼恶化的问题,提出一种两阶段设计的W...广域电力系统稳定器(Wide Area Power System Stabilizer,WAPSS)对电力系统的区间低频振荡能够起到良好的阻尼作用。同时,WAPSS参数的协调优化设计能够避免因增大某一振荡模式的阻尼而造成其他模式阻尼恶化的问题,提出一种两阶段设计的WAPSS参数协调优化方法。第一阶段基于留数相位补偿原理设计WAPSS超前滞后环节的参数。第二阶段,将整定后的超前滞后环节参数代入WAPSS传递函数以减少决策变量,再以提高低频振荡模式和近虚轴模式的阻尼为多优化目标,利用基于精英替换策略的改进教与学算法(Teaching-Learning-Based Optimization,TLBO)对WAPSS的增益参数进行优化。通过将超前滞后环节参数和增益参数两阶段协调优化,不仅减少了每次迭代计算时间,而且达到了提高电力系统阻尼的目的。最后通过两区四机的仿真算例验证了该方法的有效性。展开更多
基于电力系统数据传输网络和广域同步测量技术,提出1种用于抑制电力系统低频振荡的可介入式广域电力系统稳定器(power system stabilizer,PSS);利用可介入式广域PSS,调度通信中心可通过电力数据网络对其进行整定、控制策略修改以及投入...基于电力系统数据传输网络和广域同步测量技术,提出1种用于抑制电力系统低频振荡的可介入式广域电力系统稳定器(power system stabilizer,PSS);利用可介入式广域PSS,调度通信中心可通过电力数据网络对其进行整定、控制策略修改以及投入和退出控制。通过与常规PSS比较,可介入式广域PSS能够根据运行方式的变化,实时修改PSS的控制策略和参数,更好地抑制电力系统低频振荡。利用4机2区域系统的时域仿真验证了该方法的有效性。展开更多
In order to analyze power system stability in environment of WAMS(wide area measurement system),a new steady state stability model with time-varying delay was proposed for power system.The factors of exciter and power...In order to analyze power system stability in environment of WAMS(wide area measurement system),a new steady state stability model with time-varying delay was proposed for power system.The factors of exciter and power system stabilizer with delay were introduced into analytical model.To decrease conservativeness of stability analysis,an improved Lyapunov-Krasovskii functional was constructed,and then a new delay-dependent steady state stability criterion for power system,which overcomes the disadvantages of eigenvalue computation method,was derived.The proposed model and criterion were tested on synchronous-machine infinite-bus power system.The test results demonstrate that Lyapunov-Krasovskii functional based power system stability analysis method is applicable and effective in the analysis of time delay power system stability.展开更多
文摘该文从如何减小通信网络的影响角度,提出了实现电力系统广域PSS闭环控制架构,具有与数据上行通道结合的控制下行通道,控制终端可同步授时以实现同步控制及闭环时延补偿,实现远方信号反馈及广域协调控制。在此基础上结合应用环境实现了贵州电网的广域电力系统稳定器PSS(power system stabilizer)闭环控制系统。并阐述了广域阻尼闭环控制系统的关键技术,设计了控制下行通道的通信规约。该文最后对该架构进行了RTDS硬件闭环测试,测试结果表明,该架构可有效实现广域PSS闭环控制。
文摘广域电力系统稳定器(Wide Area Power System Stabilizer,WAPSS)对电力系统的区间低频振荡能够起到良好的阻尼作用。同时,WAPSS参数的协调优化设计能够避免因增大某一振荡模式的阻尼而造成其他模式阻尼恶化的问题,提出一种两阶段设计的WAPSS参数协调优化方法。第一阶段基于留数相位补偿原理设计WAPSS超前滞后环节的参数。第二阶段,将整定后的超前滞后环节参数代入WAPSS传递函数以减少决策变量,再以提高低频振荡模式和近虚轴模式的阻尼为多优化目标,利用基于精英替换策略的改进教与学算法(Teaching-Learning-Based Optimization,TLBO)对WAPSS的增益参数进行优化。通过将超前滞后环节参数和增益参数两阶段协调优化,不仅减少了每次迭代计算时间,而且达到了提高电力系统阻尼的目的。最后通过两区四机的仿真算例验证了该方法的有效性。
文摘基于电力系统数据传输网络和广域同步测量技术,提出1种用于抑制电力系统低频振荡的可介入式广域电力系统稳定器(power system stabilizer,PSS);利用可介入式广域PSS,调度通信中心可通过电力数据网络对其进行整定、控制策略修改以及投入和退出控制。通过与常规PSS比较,可介入式广域PSS能够根据运行方式的变化,实时修改PSS的控制策略和参数,更好地抑制电力系统低频振荡。利用4机2区域系统的时域仿真验证了该方法的有效性。
基金Projects(60425310,60974026) supported by the National Natural Science Foundation of ChinaProject(200805330004) supported by the Doctor Subject Foundation of China+1 种基金Projects(NCET-06-0679) supported by Program for New Century Excellent Talents in UniversityProject(08JJ1010) supported by the Natural Science Foundation of Hunan Province,China
文摘In order to analyze power system stability in environment of WAMS(wide area measurement system),a new steady state stability model with time-varying delay was proposed for power system.The factors of exciter and power system stabilizer with delay were introduced into analytical model.To decrease conservativeness of stability analysis,an improved Lyapunov-Krasovskii functional was constructed,and then a new delay-dependent steady state stability criterion for power system,which overcomes the disadvantages of eigenvalue computation method,was derived.The proposed model and criterion were tested on synchronous-machine infinite-bus power system.The test results demonstrate that Lyapunov-Krasovskii functional based power system stability analysis method is applicable and effective in the analysis of time delay power system stability.
