Dynamic simulation system applying two-stage DC voltage for hybrid DC power grid

Abstract

The invention discloses a dynamic simulation system applying two-stage DC voltage for a hybrid DC power grid. The dynamic simulation system comprises a converter station based on a current source type converter and a converter station based on a voltage source type converter (VSC), wherein the converter station based on the current source type converter comprises a rectification converter station and an inversion converter station, one end of the rectification converter station is connected with a power transmission side AC power grid, the other end of the rectification converter station is connected with a DC power grid, one end of the inversion converter station is connected with the DC power grid, the other end of the inversion converter station is connected with a dynamic simulation AC power grid, the converter station based on the VSC comprises a power generator side VSC converter station and a network-side VSC converter station, one end of the power generator side VSC converter station is connected with a simulation power generation set, the other end of the power generator side VSC converter station is connected with the DC power grid, one end of the network-side VSC converter station is connected with the DC power grid, and the other end of the network-side VSC converter station is connected with the dynamic simulation AC power grid. By the dynamic simulation system, a reliable and convenient research platform is provided for a system construction scheme of the DC power grid, the design of a dispatching system, research on a control protection strategy and analysis on the dynamic response characteristic, and a favorable test environment is provided for developing and debugging of system engineering.

Description

technical field [0001] The invention relates to the electrical field, in particular to a dynamic simulation system for a hybrid direct current power grid using dual-level direct current voltages. Background technique [0002] With the development and improvement of high-voltage direct current transmission technology, the number of high-voltage direct current transmission projects based on current source converters and voltage source converters has gradually increased, forming multiple direct current transmission lines with different transmission types, voltages, capacities and landing points. The transmission mode in which lines coexist in the same grid forms the prototype of a hybrid DC grid. In order to realize the construction of the Energy Internet, it is necessary to conduct detailed research on the network architecture, dispatch control and relay protection of the hybrid DC power grid. [0003] The existing simulation system for the power grid can only realize the sim...

AI Technical Summary

Problems solved by technology

[0003] The existing simulation system for the power grid can only realize the simulation of the network architecture, without considering the monitoring and scheduling of the network architecture, and cannot combine the functions of dispatch control and relay protection with the network architecture, so , and it is impossible to analyze the dynamic response characteristics of system parameters

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