相间短路故障条件下级联H桥光伏逆变器的有功功率回流抑制策略

林珊; 赵涛; 农兴中; 王春芳

doi:10.19912/j.0254-0096.tynxb.2022-1570

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太阳能学报 ›› 2024, Vol. 45 ›› Issue (3) : 470-479. DOI: 10.19912/j.0254-0096.tynxb.2022-1570

相间短路故障条件下级联H桥光伏逆变器的有功功率回流抑制策略

林珊¹, 赵涛², 农兴中¹, 王春芳²

作者信息 +

AN ACTIVE POWER BACKFLOW SUPPRESSION STRATEGY FOR CASCADED H-BRIDGE PHOTOVOLTAIC INVERTER UNDER INTER-PHASE SHORT-CIRCUIT FAULT CONDITIONS

Lin Shan¹, Zhao Tao², Nong Xingzhong¹, Wang Chunfang²

Author information +

文章历史 +

摘要

针对现有零序电压补偿策略无法有效抑制级联H桥光伏并网逆变器在电网不对称故障期间存在有功功率回流的问题,定量分析现有零序电压补偿策略的局限性,提出一种正负序最大最小值谐波零序电压注入控制策略,该策略能有效缩小过调制区域,扩大级联H桥型光伏并网逆变器在相间短路故障条件下的运行范围。实验结果验证了所提出控制策略的有效性和可行性。

Abstract

Aiming at the issue that the existing zero-sequence voltage compensation strategy cannot effectively suppress the active power backflow of cascaded H-bridge （CHB） photovoltaic （PV） grid-connected inverters during asymmetric grid faults, the limitations of the existing zero-sequence voltage compensation strategy are quantitatively analyzed,and a positive-negative sequence maximum-minimum harmonic zero-sequence voltage injection control strategy is proposed, which can effectively reduce the overmodulation zone,expand the operation range of CHB PV inverter under inter-phase short-circuit fault condition. Finally,the effectiveness and feasibility of the proposed control strategy are verified by experimental results.

导出引用

林珊, 赵涛, 农兴中, 王春芳. 相间短路故障条件下级联H桥光伏逆变器的有功功率回流抑制策略[J]. 太阳能学报. 2024, 45(3): 470-479 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1570

Lin Shan, Zhao Tao, Nong Xingzhong, Wang Chunfang. AN ACTIVE POWER BACKFLOW SUPPRESSION STRATEGY FOR CASCADED H-BRIDGE PHOTOVOLTAIC INVERTER UNDER INTER-PHASE SHORT-CIRCUIT FAULT CONDITIONS[J]. Acta Energiae Solaris Sinica. 2024, 45(3): 470-479 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1570

中图分类号： TM464

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