广域直流阻尼控制中多模式交互影响在线分析  

Online analysis of multi-mode interaction in wide-area HVDC damping control

作　　者：徐泰山[1] 朱广飞[1] 鲍颜红[1] 苏寅生[2] 徐光虎[2] 彭慧敏[1] 

机构地区：[1]国网电力科学研究院/南京南瑞集团公司,江苏南京210003 [2]中国南方电网电力调度控制中心,广东广州510623

出　　处：《电力自动化设备》2016年第5期49-54,共6页Electric Power Automation Equipment

基　　金：南方电网公司科技项目~~

摘　　要：基于暂态能量函数原理分析低频振荡中对应的能量转换过程,推导出抑制低频振荡的直流调制规律是保证调制功率与振荡相位一致。利用该调制规律定性分析直流调制对于其他振荡模式的影响,在此基础上提出采用振荡功率对时间的积分作为能量公式进行定量分析。将机组中针对某一振荡模式的功率调制对于其他模式的振荡能量变化量与该模式下机组自身阻尼消纳的振荡能量进行比较,预测直流调制在抑制某一主导振荡模式时对其他振荡模式的影响,对于多台发电机利用参与因子对能量进行加权处理。在多直流系统协调控制系统主站通过分析各主导振荡模式之间的能量关系判别是否投入直流调制控制系统。仿真算例验证了该方案的有效性和可行性。The energy conversion process during low-frequency oscillation is analyzed based on the principle of transient energy function and the law of DC modulation against the low-frequency oscillation is derived to ensure the phase of modulation power consistent with that of oscillation. The influence of DC modulation on other oscillation modes is qualitatively analyzed by the law,based on which,the integral of oscillation power to time is taken as an energy formula for the quantitative analysis. The power modulation for a particular oscillation mode will induce the variation of oscillation energy in another oscillation mode,which is then compared with the oscillation energy consumed by the damping of unit itself in that mode to evaluate the influence of DC modulation of a dominant oscillation mode on other oscillation modes. For multi-unit system,the energy is weighted by the participating factor. The energy relationship among the dominant oscillation modes of a multi-DC system is analyzed by the coordination control system of its master station to determine whether the DC modulation control system could be put into operation. The effectiveness and feasibility of the proposed scheme are verified by case simulation.

关 键 词：低频振荡 直流调制 能量函数 广域测量系统 多模式 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM71