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发明公开
CN106787890A 一种CDSM‑MMC桥臂电磁暂态建模方法和装置 有权

一种CDSM‑MMC桥臂电磁暂态建模方法和装置
摘要：
本发明提供一种CDSM‑MMC桥臂电磁暂态建模方法和装置，方法包括：确定CDSM的状态；若所述CDSM的状态是非闭锁状态，建立非闭锁状态且非故障工况下CDSM‑MMC桥臂电磁暂态模型，以及根据CDSM的故障特性建立非闭锁状态且故障工况下的CDSM‑MMC桥臂电磁暂态模型；若所述CDSM的状态是闭锁状态，建立闭锁状态下CDSM‑MMC桥臂电磁暂态模型。本发明利用Domemel等值方法，将CDSM中的电容等值成电流源和电阻的诺顿电路，然后根据CDSM正常和故障情况的电路工作原理，建立了考虑CDSM内部故障情况下的CDSM‑MMC桥臂电磁暂态模型，等效过程简单可靠，实用性强；与传统的由二极管和IGBT搭建的模型相比，本发明在取得同样精度的情况下，既能模拟CDSM内部故障，又能大幅提高仿真效率。
摘要（英）：

The invention provides a CDSM-MMC bridge arm electromagnetic transient modeling method and device. The method comprises the steps that the state of a CDSM is determined; if the state of the CDSM is an unlocked state, a CDSM-MMC bridge arm electromagnetic transient model in the unlocked state and the non-fault working condition is built, and a CDSM-MMC bridge arm electromagnetic transient model in the unlocked state and the fault working condition is built according to the fault characteristic of the CDSM; if the state of the CDSM is a locked state, a CDSM-MMC bridge arm electromagnetic transient model in the locked state is built. A Domemel equivalent method is utilized, a capacitor in the CDSM is equated into a Norton circuit of a current source and a resistor, a CDSM-MMC bridge arm electromagnetic transient model under the condition of considering faults in the CDSM is built according to the circuit working principles under the conditions that the CDSM is normal and breaks down, the equivalent process is simple and reliable, and high practicality is achieved. Compared with a traditional model erected through a diode and an IGBT, under the condition of obtaining the same precision, the faults in the CDSM can be simulated, and simulation efficiency can be greatly improved.

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