| 引用本文: | 康静,郑建勇,曾伟,袁涛.FBD法在三相四线制系统电流实时检测中应用[J].电力自动化设备,2006,(8):36-39 |
| .Application of FBD-method to real-time current detection in three-phase four-wire system[J].Electric Power Automation Equipment,2006,(8):36-39 |
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| 摘要: |
| 为了快速、有效地检测出三相四线制电力系统中的谐波、负序和零序电流,提出了一种基于FBD法的电流实时检测方法。该方法的关键是利用参考电压进行投影变换,利用参考电压和三相电流求得电路等效电导,再利用等效电导求得指令电流,从而使检出电流与参考电压波形相位保持一致,可以在系统电压畸变的情况下检测出三相电流的基波正序有功、无功电流分量,不对称电流以及谐波电流分量,拓展了FBD法的应用范围。与基于瞬时无功功率理论的电流检测方法相比,该方法没有复杂的Park变换和dq变换,可以更加快速有效地进行电流实时检测。仿真结果表明了该电流检测方法的正确性和有效性。 |
| 关键词: 有源滤波器,电流检测,三相四线,FBD法 |
| DOI： |
| 分类号:TM93 |
| 基金项目: |
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| Application of FBD-method to real-time current detection in three-phase four-wire system |
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KANG Jing ZHENG Jian-yong ZENG Wei YUAN Tao
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| Abstract: |
| A real-time current detection based on FBD(Fryze-Buchholz-Dpenbrock) method is pre-sented to detect the harmonic,negative-sequent and zero-sequent currents in three-phase four-wire system,and the essential of the method is the projection transformation of reference voltage.With reference voltages and currents,the equivalent conductance is acquired,and then used to calculate the instruction current,thus the current is in phase with the reference voltage.The fundamental positive-sequent active and reactive currents,unsymmetrical current and harmonic current can be detected in case of voltage distortion,which extends the application field of FBD method.Compared with the detection method based on instantaneous reactive power theory,it does not need Park transformation and d q transformation.Simulations prove its feasibility and validity. |
| Key words: active power filter,current detection,three-phase four-wire,FBD method |
