Definition and implementation of voltage stability indices in PSS®NETOMAC
Definition and implementation of voltage stability indices in PSS®NETOMAC
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PSS®NETOMAC 中电压稳定性指标的定义和实现
DOI：
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发表时间：
2009
期刊：
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通讯作者：
M. Tran
中科院分区：
文献类型：
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作者：
M. Tran
本文讨论了与电压稳定指标相关的重要方面及其在电力系统分析和运行中的应用。一些指标以前研究的文献中进行了审查，并实施在一个减少的本地网络，如线路稳定性指标（Lmn），电压崩溃预测指标（VCPI），和电力传输稳定性指标（PTSI）。本文基于PV曲线的二次近似性，提出了一种新的指数--近似崩溃功率指数（Approximate Collapse Power Index，ACPI）。所有指标的计算和比较与现有的西门子公司的电压稳定性标准，本地负载指数（LLI）和相角指数（PAI），减少本地网络推导。通过IEEE 9节点测试系统和包括119台发电机和414个节点的更大的测试网络，使用电力系统仿真器和网络扭转机控制（PSS® NETOMAC）软件，对稳态和动态分析的指标性能进行了研究。比较了各指标的灵敏度和计算时间。结果表明，这些指标对电力系统电压稳定性的性能是相互对应的。所有指数均在预期范围内，介于0和1之间。当系统稳定时，这些指标均为0.当系统处于电压失稳临界状态时，指标向接近1的方向移动，但在不同的水平上收敛到1。西门子公司的电压稳定性标准被发现不太敏感相比，在研究中的其他指标。然而，它们具有较短的计算时间的优点，特别是PAI。建议的ACPI指数被认为是对电压不稳定性最敏感的。然而，ACPI索引需要最长的计算时间。建议在PSS® NETOMAC的电压稳定评估模块中采用ACPI指标。
This thesis discusses important aspects related to voltage stability indices and their uses in electric power system analysis and operation. Some indices previously studied in the literature are reviewed and implemented in a reduced local network such as Line Stability Index (Lmn), Voltage Collapse Prediction Index (VCPI), and Power Transfer Stability Index (PTSI). In this thesis, a new index, Approximate Collapse Power Index (ACPI), is proposed based on quadratic approximation of PV-curves. All indices are calculated and compared with the existing Siemens‟s voltage stability criteria, Local Load Index (LLI) and Phase Angle Index (PAI), derived for the reduced local network. The performances of the indices are investigated for both steady-state and dynamic analyses through the IEEE 9-bus test system and a larger test network including 119 generators and 414 nodes using Power System Simulator and Network Torsion Machine Control (PSS®NETOMAC) software. A comparison of the indices regarding to sensitivities, and calculation time has been done. The results show that the performances of these indices are corresponding to one another regarding to voltage stability of the power system. All indices were found falling between 0 and 1 in their intended range. When the system is stable, these indices are closed 0. When the system is in critical condition with regard to voltage instability, the indices moved towards closed to 1, but at different levels of convergence to 1. The Siemens‟s voltage stability criteria were found less sensitive compared to other indices in the study. They, however, have advantages of shorter calculation time, especially PAI. The proposed ACPI index was found the most sensitive one towards voltage instability. However, ACPI index requires the longest computational time. The ACPI index is recommended to be implemented in the voltage stability assessment module in PSS®NETOMAC.