Criterion to evaluate power system online transient stability based on adjoint system energy function

Criterion to evaluate power system online transient stability based on adjoint system energy function
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基于伴随系统能量函数的电力系统在线暂态稳定性评价准则

DOI:
10.1049/iet-gtd.2014.0085
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发表时间:
2015-01
期刊:
IET Generation, Transmission & Distribution
影响因子:
--
通讯作者:
Kong Xiangyu
Kong Xiangyu
中科院分区:
其他
文献类型:
--
作者:
Jia Hongjie;Fang Dazhong;Jiang Yilang;Kong Xiangyu

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提出了一种基于广域测量系统(WAMS)信息、能量函数法和伴随电力系统(APS)模型的快速暂态稳定判据。APS是一个二维一阶微分方程模型,可以看作是对真实的电力系统的虚拟表示。首先以单机无穷大系统为例说明APS的含义。在此基础上,提出了一种基于APS投影动能的多机系统暂态稳定判据。采用基于曲线拟合技术的弹道预测方法,加快了评估过程。所提出的方法是足够快,因为它不依赖于网络结构,系统模型,系统参数和识别的相干发电机组。因此,它可以用于在线暂态稳定评估基于WAMS。通过对新英格兰系统和华北电网的仿真,验证了该方法的正确性和有效性。
In this paper, a new criterion to quickly evaluate the system transient stability based on wide area measurement system (WAMS) information, energy function method and adjoint power system (APS) model is proposed. APS is a two-dimensional-first-order differential equation model, which can be considered as a virtual representation to the real power system. Meaning of APS is first explained by using the one machine infinite bus system. Then, a new criterion based on projection kinetic energy of APS is proposed to determine the transient stability of the original power system with multiple generators. Trajectory prediction method based on curve fitting technique is adopted to accelerate the evaluation process. The proposed method is sufficiently rapid since it does not rely on the network structure, system model, system parameters and the identification of the coherent generator groups. Therefore, it can be utilised for online transient stability assessment based on WAMS. Simulation results on the New England system and one of North China Power System validate the correctness and effectiveness of the proposed method.
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