以串疊式多階配電型靜態同步補償器應用於即時三相配電系統負載平衡與功因校正

Development of Multi-Level Cascaded Dstatcom for Real-Time Load Balancing and Power Factor Correction of Three-Phase Power Distribution System

本文提出一個配電型靜態同步補償器，以應用於配電系統中三相不平衡負載的即時負載平衡與功因校正。以七階串疊式全橋轉換器作為此配電型靜態同步補償器主電路架構，可適用於高電壓、高功率應用。本文中，配電型靜態同步補償器主電路以△接線方式連接，並進行相獨立控制，適用於三相不平衡負載的即時負載補償。本文首先使用對稱成份法推導配電型靜態同步補償器的補償策略，並在MatLab/SimuLink程式中建構模擬系統以進行初步功能驗證。最後，本文架構一個硬體雛型，以實際測試驗證此△接線配電型靜態同步補償器對三相不平衡負載的補償效能。

This paper proposes a distribution level static synchronous compensator(DSTATCOM) based on multi-level full H-bridge (FHB) inverter withdelta configuration for real-time load balancing and power factor correctionof unbalanced loads in three-phase power distribution systems. Use ofcascaded FHB inverters for the main circuit of the DSTATCOM aresuitable for high-voltage and high-power applications. First, use of thesymmetrical components method derives the compensation algorithm ofthe delta-connected DSTATCOM. The DSTATCOM is built and simulatedwith the MatLab/SimuLink program for preliminarily verification.Finally, a hardware prototype is constructed for testing. Experimentalresults verify the function of the proposed DSTATCOM.