采用阻尼水平定义边界的实用电力系统小扰动稳定域  

A Practical Power System Small Signal Stability Region Using Boundary Defined by Damping Level

作　　者：吴熙[1] 蒋平[1] 

机构地区：[1]东南大学电气工程学院,江苏省南京市210096

出　　处：《电网技术》2013年第8期2173-2179,共7页Power System Technology

基　　金："十一五"国家科技支撑计划重大项目(2008BAA13B07);江苏省研究生科研创新计划项目(CXZZ11_0151)~~

摘　　要：提出了一种适用于低频振荡、次同步振荡问题分析的电力系统小扰动稳定域(P-SSSR)定义方法。根据低频振荡、次同步振荡的特点,分别以相对阻尼水平和绝对阻尼水平定义了一种新的小扰动稳定边界,并用这种新的稳定边界构成P-SSSR。提出了一种连续法和直接法相结合的稳定域边界求解方法,在IEEE次同步谐振第一标准模型中分别计算了传统小扰动稳定域(SSSR)和P-SSSR边界,比较了这2种稳定域的计算耗时和边界点特性。结果表明,实用电力系统小扰动稳定域考虑了实际运行的阻尼水平要求,使得位于该小扰动稳定域内的运行点符合实际运行的阻尼标准,能在几乎没有增加计算量的情况下获得一种更为可靠实用的电力系统小扰动稳定域,具有重要的理论研究价值和工程实用意义。A method to define power system small signal stability region（P-SSSR） suitable for the analysis on low-frequency oscillation（LFO） and sub-synchronous oscillation（SSO） is proposed.According to the features of LFO and SSO,a new small stability boundary is defined by relative damping level and absolute damping level respectively,and the P-SSSR is constructed by the new stability boundary.A method to solve the boundary of stability region,in which the continuous method is combined with direct method,is put forward.The boundaries for traditional SSSR and P-SSSR of IEEE first benchmark system are computed,and comparisons of the computing time and boundary characteristics are made between the two stability regions.The results show that in the proposed P-SSSR the requirements for damping level for actual operation are considered,so it makes the operating point located in the P-SSSR conforming to the damping standard in practical operation,and a more reliable and practical small signal stability region can be obtained while the calculation burden is hardly increased.

关 键 词：电力系统 小扰动稳定域 低频振荡 次同步振荡 

分 类 号：TM721[电气工程—电力系统及自动化]