自动化与仪器仪表
自動化與儀器儀錶
자동화여의기의표
AUTOMATION & INSTRUMENTATION
2014年
1期
151-154
,共4页
软件锁相%正负序分离%电压畸变%相序解耦%二阶广义积分
軟件鎖相%正負序分離%電壓畸變%相序解耦%二階廣義積分
연건쇄상%정부서분리%전압기변%상서해우%이계엄의적분
Software phase-locked%Positive and negative sequence separation%Voltage distortion%Sequence Decoupled Reso-nant(SDR)%Second Order Generalized Integrator(SOGI)
针对传统软件锁相环(SPLL)在三相电压不平衡且严重畸变条件下不能准确跟踪电网电压的频率和相位的问题。本文提出了一种基于相序解耦(SDR)级联二阶广义积分(SOGI)的新型软件锁相模型，通过SDR和SOGI实现了正负序分离，电压基波提取，以及滤波功能，有效地消除了负序分量、谐波分量对准确获取频率和相位信息的影响。仿真结果表明在三相电压不平衡且严重畸变的条件下，该新型SPLL能够准确地锁定电网电压的频率和相位，从而有效性地验证了新方法的正确性。
針對傳統軟件鎖相環(SPLL)在三相電壓不平衡且嚴重畸變條件下不能準確跟蹤電網電壓的頻率和相位的問題。本文提齣瞭一種基于相序解耦(SDR)級聯二階廣義積分(SOGI)的新型軟件鎖相模型，通過SDR和SOGI實現瞭正負序分離，電壓基波提取，以及濾波功能，有效地消除瞭負序分量、諧波分量對準確穫取頻率和相位信息的影響。倣真結果錶明在三相電壓不平衡且嚴重畸變的條件下，該新型SPLL能夠準確地鎖定電網電壓的頻率和相位，從而有效性地驗證瞭新方法的正確性。
침대전통연건쇄상배(SPLL)재삼상전압불평형차엄중기변조건하불능준학근종전망전압적빈솔화상위적문제。본문제출료일충기우상서해우(SDR)급련이계엄의적분(SOGI)적신형연건쇄상모형，통과SDR화SOGI실현료정부서분리，전압기파제취，이급려파공능，유효지소제료부서분량、해파분량대준학획취빈솔화상위신식적영향。방진결과표명재삼상전압불평형차엄중기변적조건하，해신형SPLL능구준학지쇄정전망전압적빈솔화상위，종이유효성지험증료신방법적정학성。
The traditional SPLL can’t accurately track the frequency and phase of the grid voltage under the condition of unbal-anced and seriously distorted three-phase voltage. To solve this problem, the novel SPLL model based on Sequence Decoupled Reso-nant (SDR) combined with Second Order Generalized Integrator (SOGI) is proposed. By using the technic of SDR and SOGI, this design successfully achieves the separation of positive and negative sequence voltage, the extraction of fundamental voltage and a filting function. At the same time, the influence of the negative sequence component and the harmonic component can be effectively eliminated during the process of tracking the frequency and phase information. The simulation results show that the new SPLL can accurately track the frequency and phase of the grid voltage under the condition of unbalanced and seriously distorted three-phase voltage, which verify its validity and correctness.
