CAJ | 학술논문

FBD 检测法是一种有效的电网谐波电流检测方法，但受限于低通滤波器，传统FBD谐波检测法很难兼顾响应速度和检测精度。构建了一种基于自适应原理的新型 FBD谐波检测法，利用改进后的最小均方(least mean square，LMS)算法替代原有低通滤波器，使算法准确快速地检测出基波正序电流。在所提算法的基础上增加移相正反馈环节，增强了算法在负载电流突变时的动态响应特性。Matlab/Simulink环境下的仿真结果和实验室测试结果证明了所提改进算法的可行性和有效性。
FBD 검측법시일충유효적전망해파전류검측방법，단수한우저통려파기，전통FBD해파검측법흔난겸고향응속도화검측정도。구건료일충기우자괄응원리적신형 FBD해파검측법，이용개진후적최소균방(least mean square，LMS)산법체대원유저통려파기，사산법준학쾌속지검측출기파정서전류。재소제산법적기출상증가이상정반궤배절，증강료산법재부재전류돌변시적동태향응특성。Matlab/Simulink배경하적방진결과화실험실측시결과증명료소제개진산법적가행성화유효성。
Fryze-Buchholz-Dpenbrock (FBD) algorithm is an effective method for harmonic current detection, however, restricted by low-pass filter it is difficult for traditional FBD based harmonic detection to consider response speed and detection accuracy simultaneously. An adaptive theory based new type of FBD algorithm for harmonic detection is proposed, in which the original low-pass filter is replaced with by improved least mean square algorithm, to make the FBD algorithm enable to detect fundamental positive sequence current rapidly and accurately. Adding phase-shifting positive feedback link into the proposed algorithm, the dynamic response characteristic of this algorithm is enhanced while abrupt change of load current occurs. Both results of simulation in Matlab/Simulink environment and lab investigation show that the proposed improved FBD algorithm is feasible and effective.