- 學位論文
科技廠電力品質量測及諧波模擬改善與驗證
Power Quality Measurement and Harmonic Simulation in a Hi-Tec Factorial Distribution System
摘要
摘 要 本研究透過歐華公司ADX-3000電力品質監測儀來量測科技廠電力品質狀況，包含諧波、電壓閃爍、電壓、電流三相不平衡率、電力狀況等，量測結果顯示，工廠配電系統問題中諧波污染頗為嚴重。在測量諧波時分為電容器投入、切離二種狀態，在電容器切離時在主電力控制盤上量測到的諧波量，即視為負載的諧波量，而在電容器投入時，藉由量測主電力控制盤及電容器上的諧波量取向量合，來模擬負載諧波，二相互比照驗證，來獲得諧波模擬時的諧波源。本論文提出一個以負載流向系統的量做為評量基準的正確方式來評估諧波改善情況；建立Y、Z矩陣求得各Bus的驅動點阻抗，並歸納一個驅動點阻抗簡易估算法，推算出負載的大小變動幾乎不影響諧波之分析、模擬；同時依照MPA1、PM3盤等之測得的諧波量，取最大諧波量之次數來設計被動濾波器並運用MATLAB軟體來模擬濾波器改善的效能，進而提出有效的對策，來降低工廠因電力品質不佳所造成的損失。
並列摘要
This research measures a high-tech factory's power quality including the harmonic, flicker and three-phase unbalance ratio measurement. We have two capacitor states when measuring the harmonic currents. The one is with capacitor off, and the harmonic currents measured from the power panel is “load harmonic currents”. The other is with capacitor on, and the measured harmonics are the combinations of “simulated load harmonic currents” and harmonic currents of capacitors. Then we use the differences of these two currents as simulated harmonic current source. This thesis proposes a method to estimate the harmonic mitigation by filter.The Y、Z-matrix of power system in first established to obtain the driving-point impedance for each bus. Secondly, the design and simulation of performance of the filter are proposed. It also proposes an effective strategy to reduce the loss caused by the poor power quality.