重庆电力高等专科学校学报
重慶電力高等專科學校學報
중경전력고등전과학교학보
JOURNAL OF CHONGQING COLLEGE OF ELECTRIC POWER
2011年
6期
62-64
,共3页
三相不对称负荷%功率测量%误差校正%虚拟中性点电压
三相不對稱負荷%功率測量%誤差校正%虛擬中性點電壓
삼상불대칭부하%공솔측량%오차교정%허의중성점전압
three-phase asymmetric load%power measurement%error correction%virtual neutral-point voltage
为提高功率测量的精度,针对三相负荷不对称时,三表法测量三相四线制电路有功功率存在测量误差的问题,提出从检测负荷虚拟中性点电压出发,将三相不对称负荷电路转化为三个单相电路,按照单相电路功率计量方法来计量各独立相负荷功率的方案。
為提高功率測量的精度,針對三相負荷不對稱時,三錶法測量三相四線製電路有功功率存在測量誤差的問題,提齣從檢測負荷虛擬中性點電壓齣髮,將三相不對稱負荷電路轉化為三箇單相電路,按照單相電路功率計量方法來計量各獨立相負荷功率的方案。
위제고공솔측량적정도,침대삼상부하불대칭시,삼표법측량삼상사선제전로유공공솔존재측량오차적문제,제출종검측부하허의중성점전압출발,장삼상불대칭부하전로전화위삼개단상전로,안조단상전로공솔계량방법래계량각독립상부하공솔적방안。
In the case of the three-phase asymmetric load,the three-ammeter method in the measurement of the active power of the three-phase and four-wire circuit will cause the measurement error.In order to improve the accuracy of the power measurement,this essay suggests starting with the detection of the virtual neutral-point voltage,changing the three-asymmetric load circuit into three one-phase circuits,and measuring the load power of each phase by using the method used in power measurement of the single-phase circuit.
