Novel load element model considering power electronic influence

Abstract

The invention discloses a novel load element model considering power electronic influence, the load element model comprises a load element physical mechanism-based model and a converter transformation model, and the converter transformation model comprises a power grid side model of a converter, a DC-DC model of the converter and a load side model of the converter. The power grid side model of the converter, the DC-DC model of the converter and the load side model of the converter are connected in series. According to the load element model, a power electronic interface circuit model and a power load element physical mechanism are fused, the characteristics of a power electronic converter can be embodied, the characteristics of power electronics can also be embodied, the power electronic converter is converted into a converter power grid side port equivalent circuit through a two-port network equivalent model, and, for a converter conversion matrix consists of a port equivalent circuit at the load side of the converter and the like, so that the behavior characteristics of the novel load element can be described more accurately.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a novel load element model considering the influence of power electronics. Background technique [0002] It is necessary to build a clean, low-carbon, safe and efficient energy system, control the total amount of fossil energy, focus on improving utilization efficiency, implement renewable energy substitution actions, deepen the reform of the power system, and build a new power system with new energy as the main body. "Elevate new energy to the dominant position. [0003] The new type of power system is first reflected in the power structure with new energy as the main body; secondly, it is reflected in the flexible grid instead of the synchronous AC grid, and the flexibility and flexibility of the grid are more prominent; finally, it reflects the safety, stability and economy of the power system. Power electronics technology with high reliability and low loss is one of its specific...

AI Technical Summary

Problems solved by technology

Different from traditional grid load components, new energy grid-connected and controllable power equipment with power electronics as the interface are widely used in the grid. The physical characteristics of load components are shielded by power electronics interface circuits, such as through power electronics inverters. Grid-connected wind turbines cannot consider their inertial index on the grid side

In addition, with the help of high-performance control logic implemented by power electronic devices, pulse width modulation technology, and control algorithms, the load power factor of the power electronic interface can be approximated to 1. This index has a significant effect on reducing energy consumption, but redefining the load electrical characteristics, which further increases the diversity of load models and the difficulty of identification, increases the complexity of power grid operation, and puts forward new requirements for dispatching systems and staff

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