基于虚拟电感的构网型换流器强电网适应性优化策略OA
Strong Grid Adaptive Optimization Strategy of Grid-forming Converter Based on Virtual Inductor
构网型(GFM)换流器对外表现为电压源特性,在弱电网中具有良好的适应性和频率电压支撑作用,但在强电网中由于阻抗特性的原因易发生振荡失稳.针对此问题,在分析GFM换流器阻抗特性的基础上,提出了一种基于虚拟电感的构网型换流器强电网适应性优化策略.为分析控制方式对GFM换流器的并网稳定性影响,首先对幅相直接控制型GFM换流器进行了详细的序阻抗建模.其次,研究了电网和滤波电感对GFM换流器的并网稳定性影响规律,明确了其失稳场景.最后,搭建了基于RT-LAB和DSP控制器的硬件在环实时仿真测试平台,从不同的虚拟电感参数方面对策略进行了实验测试,验证了所提策略的有效性和优越性.
Grid-forming(GFM)converter is a voltage source and has good adaptability and frequency-voltage support in weak grid,but is prone to oscillation instability in strong grid due to impedance characteristics.To solve this problem,based on the analysis of the impedance characteristics of the GFM converter,an adaptive optimization strategy of the GFM converter based on virtual inductance was proposed.In order to analyze the influence of control mode on the grid-connected stability of GFM converter,the sequence impedance model of GFM converter with direct amplitude-phase control was modeled in detail.Secondly,the influence of power grid and filter inductance on the grid-connected stability of GFM converter was studied,and its instability scenario was defined.Finally,a hardware-in-loop real-time simulation test platform based on RT-LAB and DSP controller was built,and the strategy was experimentally tested from different virtual inductance parameters,which verifies the effectiveness and superiority of the proposed strategy.
霍震;谢竟成;王晨雨;刘昊;孟建辉;高本锋
国能南京电力试验研究有限公司,江苏 南京 210023国能南京电力试验研究有限公司,江苏 南京 210023华北电力大学(保定)新能源电力系统国家重点实验室,河北 保定 071003华北电力大学(保定)新能源电力系统国家重点实验室,河北 保定 071003华北电力大学(保定)新能源电力系统国家重点实验室,河北 保定 071003华北电力大学(保定)新能源电力系统国家重点实验室,河北 保定 071003
信息技术与安全科学
构网型换流器序阻抗建模稳定性分析虚拟电感策略优化
grid-forming(GFM)convertersequence impedance modelingstability analysisvirtual inductorstrategy optimization
《电气传动》 2026 (2)
20-27,8
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