Cascading multi-level static synchronous compensator and control method

Abstract

The invention relates to a cascading multi-level static synchronous compensator and a control method. The cascading multi-level static synchronous compensator is technically characterized by comprising a main circuit module, a detecting module, a DSP control module and an IGBT driving module; the input end of the detecting module is connected with the output end of the main circuit module and used for collecting three-phase voltage, current and phase signals of a network system. The output end of the detecting module is connected with the input end of the DSP control module. The output end of the DSP control module is connected with the input end of the IGBT driving module. The output end of the IGBT driving module is connected with the input end of the main circuit module. A cascading multi-level inverter suitable for the high-capacity static synchronous compensator is adopted as the main circuit structure, the flexible linear active-disturbance-rejection control technology is utilized for acquiring a high-precision control effect, the rapidity and robustness of a system are greatly improved, the reactive compensation response speed of the system is increased to the maximum degree, and electric energy quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of reactive power compensation in electric power systems, and in particular relates to a cascaded multilevel static synchronous compensator and a control method. Background technique [0002] Static synchronous compensator (STATCOM) is a parallel reactive power compensation FACTS device, which can emit or absorb reactive power. In the power system, it can quickly and smoothly absorb inductive and capacitive reactive power. Due to its It has the advantages of no shock at start, continuous adjustment, fast response, small footprint, etc. It is widely used in the field of electric power industry and has developed rapidly. [0003] In addition, what kind of static synchronous compensator (STATCOM) control strategy will directly affect the dynamic response of the power system and whether it can provide reactive power quickly and continuously to support the stable system voltage. At present, most control strategi...

AI Technical Summary

Problems solved by technology

[0004] However, for general static synchronous compensators in practical applications, there are still common problems such as large output harmonic content, limited switching device capacity and voltage level, low precision of control effect, and slow response speed of reactive power compensation.

Images