摘要：针对风火打捆(wind-thermal-bundled,WTB)系统在受到干扰时可能由于阻尼不足而出现的低频振荡现象以及较高的网损会导致运行成本的增加和阻碍“双碳”目标实现的问题,提出了一种电力系统稳定器(power system stabilizer,pss)与统一潮流控制器(unified power flow controller,UPFC)附加功率振荡阻尼控制器(power oscillation damping,POD)参数和UPFC安装位置协调优化策略方法。首先,基于Matlab构建了风火打捆外送系统和控制器模型。然后,利用多目标樽海鞘优化算法(multi-objective salp swarm algorithm,MSSA),将协调优化问题转化为多目标优化问题。目标函数设计中考虑了UPFC装置的调节特性。最后,采用IEEE 4机2区系统和16机5区系统进行多种工况下的仿真。仿真结果显示,协调优化后的控制器可以提高系统阻尼,维持发电机转速的稳定,抑制低频振荡引起的系统有功、电压等的波动,同时降低了系统的有功网损,提高了系统稳定性和运行经济性。MSSA在工程问题上的应用得到了补充。

摘要：波音737MAX飞机安装了全新设计的LEAP-1B发动机,采用复合材料风扇机匣、大宽弦比的高性能叶片,具有更好的燃油经济性和更低的二氧化碳排放量。发动机电子控制系统(EEC)增加了多项发动机气路油路控制功能,并集成了发动机反推控制功能,同时为减小EEC体积,将EECA/B通道和压力传感子系统(pss)分开设计,该设计在寒冷和冰雪天气容易造成pss结冰而导致故障。本文针对pss结冰产生的故障现象、故障原因进行了分析,并提供了预防方法。

摘要：Power System Stabilizer (pss) was proposed during 1960s to solve the low frequency oscillation problem raised by the wide application of the high-gain fast-response exciters. The fundamentals of pss design lie in the angle compensation to increase the damping torque, which, since then, has become an important principle in designing the various power system dampers, such as SVC, TCSC, UPFC. Although many papers have been dedicated to the application of this principle, it is interesting to note that in the real industry applications pss parameters have to be carefully tuned on site in spite of its mature design theory. So does the classical pss design theory really meet the pss design demand? By combining the frequency domain and the time domain analysis, this paper reinvestigates the basic idea behind the classical pss design theory. The paper clarifies the con-cepts of the synchronous torque as well as the damping torque and proves that the classical pss design principles based on these concepts are not theoretically sound. Then the paper discusses the Linear Optimal Controller Design method and ana-lyzes its relations with the conventional PID design. By doing so the paper reveals the real mechanism of the pss and proposes to use more systematic and advanced control tools to enhance the controller performance.

摘要：A single machine-infinite-bus(SMIB) system including the interline power flow controllers(IPFCs) and the power system stabilizer(pss) controller is addressed. The linearized system model is considered for investigating the interactions among IPFC and pss controllers. To improve the stability of whole system again different disturbances, a lead-lag controller is considered to produce supplementary signal. The proposed supplementary controller is implemented to improve the damping of the power system low frequency oscillations(LFOs). Imperialist optimization algorithm(ICA) and shuffled frog leaping algorithm(SFLA) are implemented to search for optimal supplementary controllers and pss parameters. Moreover, singular value decomposition(SVD) method is utilized to select the most effective damping control signal of IPFC lead-lag controllers. To evaluate the system performance, different operating conditions are considered. Reponses of system in five modes including uncoordinated and coordinated modes of IPFC and pss using ICA and SFLA are studied and compared. Considering the results, response of system without controller shows the highest overshoot and the longest settling time for rotor angel at the different operating conditions. In this mode of system, rotor speed has the highest overshoot. Rotor angel in the system with only pss includes lower overshoot and oscillation than system without controller. When pss is only implemented, rotor speed deviation has the longest settling time. Rotor speed deviation in the uncoordinated mode of IPFC and pss shows lower overshoot than system with only pss and without controller. It is noticeable that in this mode, rotor angel has higher overshoot than system with only pss. The superiority of the suggested ICA-based coordinated controllers is obvious compared with SFLA-based coordinated controllers and other system modes. Responses of coordinated pss and IPFC SFLA-based supplementary controllers include higher peak amplitude and l

摘要：A newly developed heuristic global optimization algorithm,called gravitational search algorithm(GSA),was introduced and applied for simultaneously coordinated designing of power system stabilizer(pss) and thyristor controlled series capacitor(TCSC) as a damping controller in the multi-machine power *** coordinated design problem of pss and TCSC controllers over a wide range of loading conditions is formulated as a multi-objective optimization problem which is the aggregation of two objectives related to damping ratio and damping *** minimizing the objective function with oscillation,the characteristics between areas are contained and hence the interactions among the pss and TCSC controller under transient conditions are *** evaluation of effectiveness and robustness of proposed controllers,the performance was tested on a weakly connected power system subjected to different disturbances,loading conditions and system parameter *** eigenvalues analysis and nonlinear simulation results demonstrate the high performance of proposed controllers which is able to provide efficient damping of low frequency oscillations.

摘要：多机电力系统pss的合理设计对于抑制低频振荡至关重要。基于单机无穷大系统的pss设计方法简单明了,但需要解决等值单机无穷大系统的求取问题。提出了一种直接利用多机系统Phillips-Heffron模型线性化矩阵对角元素形成等值单机无穷大系统Phillips-Heffron模型的新方法,并采用相位补偿法进行pss设计。与基于发电机间的节点导纳矩阵求取等值单机无穷大系统的方法相比,新方法省去了各机组等值系统参数和线性化系数的计算工作。基于等值单机无穷大系统的pss设计方法简洁,物理概念清晰,计算量小,便于现场应用。算例比较表明,基于等值单机无穷大系统设计的pss增强系统阻尼的效果不比一些统一协调设计法的差。

摘要：Prony分析是获取系统振荡模式的一种非常有效的分析方法,它可以通过给定输入信号下的响应直接估计系统的振荡频率、阻尼、幅值和相对相位。文章介绍了基于Prony分析的电力系统等值线性模型的辨识方法,对传统的Prony方法进一步扩充,考虑了输入信号对输出信号的影响,得到了系统的传递函数,并根据其相应留数,采用留数方法对电力系统稳定器(pss)进行了参数的协调配置。两个算例的仿真结果证明了该方法在系统振荡模式分析和pss参数设计中的有效性。

摘要：大规模双馈风机并网后,由于风电输出功率波动性及远距离输电,互联电力系统将面临不同区域电网间的低频振荡问题,为此提出了一种附加阻尼控制策略。首先基于风力发电系统模型,建立了含风电场的互联电力系统线性化模型;再根据系统状态空间模型特征根分析理论,结合相位偏移补偿环节与反馈增益环节,提出了基于经典pss结构的时滞广域阻尼器参数计算方法;然后考虑实际时滞呈现莱斯概率分布特性,设计了针对时变时滞的自适应策略;最后,通过含大型风电场的四机两区域系统时域仿真验证了所提出的附加阻尼控制策略不仅适应随机时变时滞,而且在较大的时滞范围和鲁棒性方面性能良好。

摘要：结合2012规划特高压局部电网,提出具有工程实用性的低频振荡控制方案:采用Prony分析检测联络线主导振荡模式,对区域内振荡模式,通过在与该模式强相关的发电机上安装电力系统稳定器(pss)进行阻尼控制;对区域间振荡模式,采用带附加阻尼控制的静止无功补偿器(SVC)抑制振荡。用PSASP进行仿真,在联络线末端设置故障,检验配置pss或者SVC后的功率振荡的抑制情况。仿真结果表明,该方案设计有效,具有较好的工程参考价值。

摘要：SoC(System on Chip)特别是大规模数据通信芯片包含较多接口模块,可配置成的端口(Port)数量大、速率种类多;在实际应用中当芯片和对端设备连接时,有非常丰富的端口配置组合模式,需要海量的验证场景以确保芯片在流片前的设计质量。当前的随机化仿真验证如UVM(Universal Verification Methodology)一般只对数据会话(Transaction)配置进行随机,很难覆盖如此丰富的接口模式和系统场景组合,这给芯片验证方法和EDA(Electronic Design Automation)工具带来了巨大的挑战。本文介绍了一种随机化系统场景激励自动产生方法,灵活构造系统级验证平台,可对待测芯片设计DUT(Design Under Test)仿真时动态调整,并通过场景随机化实现完全覆盖验证。本方法已完成开发、并应用于百亿级晶体管SoC芯片仿真验证,在流片前及时发现了多个芯片设计RTL(Register Transfer Level)问题,有效提升了具有复杂接口和多种配置组合系统场景的SoC开发质量。