2results about How to "Realize simulation analysis" patented technology

The invention provides a simulation modeling method of a modular multilevel converter, which comprises the following steps of: performing simulation modeling on a core power device of one of six bridge arms through a digital model by adopting a mode of 1: 1 with engineering practice, the core power device comprises an IGBT (Insulated Gate Bipolar Translator), an anti-parallel diode and a parallel capacitor; carrying out equivalent simulation modeling on the other five bridge arms in the six bridge arms; the upper and lower positions of the abc three phases of the bridge arm which is modeled in the simulation modeling mode are changed through setting according to simulation analysis requirements. According to the invention, the problem that the simulation efficiency and the internal fault simulation requirement of the current modular multilevel converter cannot be considered at the same time is solved.

The application discloses a simulation analysis method and device based on an RTDS large power grid equivalent model, and is applied to RTDS and a DC hybrid large power grid, and the method comprises the following steps: S1, a first bus with a new energy unit is randomly acquired, and the first bus is put into a pre-set task queue; S2, based on the first bus and the task queue, an equivalent modeling is performed on the new energy unit in combination with a pre-set voltage threshold value, so that a power grid equivalent model is obtained; S3, it is judged whether all nodes in the task queue have been traversed; if not, the step S2 is returned to be executed; and S4, a simulation analysis instruction is received, simulation analysis is performed by using the equivalent model, and a simulation analysis result is obtained. Based on the RTDS platform, the establishment and simulation analysis of the large power grid equivalent model are realized, and under the condition of high proportion of new energy penetration at the present stage, a large amount of simulation resources is saved.