一种电压灵活配比级联型换流系统配置方法
By using a cascaded converter system configuration method with flexible voltage ratio, coordinating the adjustment of DC voltage ratio, and adopting a hybrid design of full-bridge submodules, the problem of limited power distribution in cascaded flexible DC technology is solved, achieving flexible power distribution and dynamic mutual assistance, and improving the renewable energy absorption capacity and the flexibility and safety of system operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG UNIV
- Filing Date
- 2026-04-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing cascaded flexible DC technology has problems such as power ratio lock-up during the planning stage and limited power mutual assistance during the operation stage when absorbing new energy at multiple points. It cannot achieve flexible power allocation and dynamic adjustment, which increases the pressure on the system to absorb new energy under load fluctuations and randomness of new energy output.
A cascaded converter system configuration method with flexible voltage matching is adopted. By coordinating the adjustment of the DC voltage ratio between the two stations and utilizing the mixed matching design of full-bridge submodules and half-bridge submodules, flexible mutual assistance of active power between different converter stations is achieved. Combined with a dual closed-loop control structure, dynamic power distribution and voltage regulation are realized.
The system achieves flexible power allocation during the planning phase, expands the power mutual assistance range during operation, enhances the system's flexibility and safety, and can dynamically adjust the voltage division ratio according to the load, thereby improving the level of new energy consumption and the operational flexibility of the DC transmission network.
Smart Images
Figure CN122026545B_ABST