Using RSCAD's Simplified Inverter Components to Model Smart Inverters in Power Systems
Using RSCAD's Simplified Inverter Components to Model Smart Inverters in Power Systems
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使用 RSCAD 的简化逆变器组件对电力系统中的智能逆变器进行建模
DOI：
10.1109/compeng.2018.8536238
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
K. Otani
中科院分区：
文献类型：
--
作者：
T. Ustun;J. Hashimoto;K. Otani
由于智能逆变器（si）提供辅助支持的能力，人们对其越来越感兴趣。电力公司有兴趣在他们的网络中部署它们，以便在需要的时候获得必要的频率和电压支持。然而，这些逆变器与电网动态交换实功率和无功功率，并试图改变系统的工作点。电力系统在配电层面的这种动态行为可能会产生前所未有的问题。为了测试它们对网络的影响，最好使用硬件在环（HIL）测试。HIL测试比纯仿真研究具有更高的保真度，并且可以模拟真实的电网来研究特定的现象。结合实际的SI硬件和软件建模的电源系统，可以深入研究不同的工作模式及其对系统的影响。对配电网中的多个si进行建模是一个真正的挑战，因为它们需要小的时间步长建模，这限制了实时仿真平台（如RTDS）的计算能力。为了避免这个问题，RSCAD中简化的逆变器模型被用来建模SI功能，如电压- var或功率因数控制。使用这种方法，逆变器内的单个开关没有建模，并且没有考虑到由快速开关引起的现象，例如谐波。对于专注于潮流控制或电压支持的研究，这种权衡是可以接受的，因为许多si可以在网络中轻松实现。
There is growing interest in Smart Inverters (SIs) thanks to their capabilities of providing auxiliary support. Power companies are interested in deploying them in their networks to get necessary frequency and voltage support at times of need. However, these inverters dynamically exchange real and reactive power with the grid and try to change operating point of the system. This dynamic behavior at the distribution level of the power systems may create unprecedented problems. In order to test their impact on the network, hardware-in-the-Ioop (HIL) testing is preferred. HIL tests give higher fidelity than simulation-only studies and can model real power networks to study a particular phenomenon. With a combination of real SI hardware and power system modeled in software, different operating modes and their impact on the system can be investigated thoroughly. It is a real challenge to model several SIs in a distribution network as they require small time step modeling which limits computing capacity of real-time simulation platforms such as RTDS. In order to circumvent this issue, simplified inverter models in RSCAD are utilized to model SI functions such as Volt-Var or Power Factor control. With this approach, individual switches within an inverter are not modeled and phenomena that are resulting from rapid switching, such as harmonics, are not taken into account. For studies that focus on the power flow control or voltage support, this trade off is acceptable as many SIs can be easily implemented within a network.