Investigating small-disturbance stability in power systems with grid-following and grid-forming VSCs using hybrid modelling approaches
Investigating small-disturbance stability in power systems with grid-following and grid-forming VSCs using hybrid modelling approaches
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DOI：
10.1016/j.epsr.2022.108448
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发表时间：
2022-10
影响因子：
3.9
通讯作者：
Youhong Chen;Luke Benedetti;R. Preece;P. Papadopoulos;M. Barnes;A. Egea-Àlvarez
中科院分区：
文献类型：
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作者：
Youhong Chen;Luke Benedetti;R. Preece;P. Papadopoulos;M. Barnes;A. Egea-Àlvarez
电力电子设备的大规模集成正在改变电力系统中的小扰动稳定性问题，从最初的同步发电机之间的相互作用转变为包括电力电子设备与交流网络之间的相互作用。然而，用于大系统小扰动稳定评估的交流网络建模一般不包括输电网络动态，因此不能识别这些新出现的电力现象。一种建议的解决方案是混合建模方法，该方法用网络动态对电力电子设备周围的区域建模，而用稳态模型表示网络的其余部分。针对不同的电力电子控制方案、不同的电力电子运行方式、不同的电力电子设备位置，确定了最合适的交流网络动态建模方案。结果表明，当VSC位于低SCR区域，工作在逆变模式，并采用电网跟踪或电网形成控制，且内部电流控制被显式建模时，必须对更多的网络进行动态建模。相比之下，对于高SCR区域、整流模式，以及在没有显式表示内部电流控制器的情况下对电网形成控制进行建模时，所需的动态细节较少。调查是使用IEEE 39母线测试系统进行的。
The mass integration of power electronics-based devices is changing small-disturbance stability issues in power systems from primarily interactions between synchronous generators to include interactions between power electronic devices and the AC network. However, modelling of AC networks for small-disturbance stability assessment in large power systems generally do not include the transmission network dynamics and, therefore, fails to identify these newly emerging power phenomena. A suggested solution is the hybrid modelling approach which models the vicinity around the power electronics with network dynamics while representing the remainder of the network with a steady-state model. This paper identifies the most appropriate selection of dynamic AC network modelling in accordance with different scenarios including different power electronic control schemes, different power electronic operation modes, and different locations of power electronic devices. It is shown that more of the network must be modelled dynamically when VSCs are located in low SCR regions, operating in inverting mode, and using grid following or grid-forming control with inner current control explicitly modelled. Contrastingly, less dynamic detail is required for high SCR regions, rectifying mode, and when modelling grid forming control without explicit representation of the inner current controllers. Investigations are performed using the IEEE 39-bus test system.