论文标题
在线电源系统稳态稳定性监视的一种模态空间方法
A Modal-Space Method for Online Power System Steady-State Stability Monitoring
论文作者
论文摘要
本文提出了一种新的方法，通过在模态空间中使用非线性动力系统动态模型来估计稳态角稳定性极限（SSASL）。通过坐标的两个线性变化和稳态条件引入的简化，非线性动力系统动态模型被转换为许多单基机式功率系统，它们的功率角曲线可以得出并用于估算SSASL。所提出的方法估算所有机器和所有总线的角度的SSASL，而无需手动指定方案，即设置接收器和源区域，也无需求解多个非线性功率流。关于9级和39个总线电源系统的案例研究表明，所提出的方法始终能够在在线环境中捕获上的不稳定性，在在线监测基于传统的电力流量分析的稳态稳定性方面表现出了有希望的表现。
This paper proposes a novel approach to estimate the steady-state angle stability limit (SSASL) by using the nonlinear power system dynamic model in the modal space. Through two linear changes of coordinates and a simplification introduced by the steady-state condition, the nonlinear power system dynamic model is transformed into a number of single-machine-like power systems whose power-angle curves can be derived and used for estimating the SSASL. The proposed approach estimates the SSASL of angles at all machines and all buses without the need for manually specifying the scenario, i.e. setting sink and source areas, and also without the need for solving multiple nonlinear power flows. Case studies on 9-bus and 39-bus power systems demonstrate that the proposed approach is always able to capture the aperiodic instability in an online environment, showing promising performance in the online monitoring of the steady-state angle stability over the traditional power flow-based analysis.
