| 1. | Research of harmonic current detect methods in three - phase four - wire system
三相四线制系统中谐波电流实时检测的研究 |
| 2. | Three - phase four - wire system
三相四线制 |
| 3. | Main circuit structure and control of the active power filter for three - phase four - wire system
三相四线制有源电力滤波器主电路的结构形式与控制 |
| 4. | In the situation of using mass electric energy or three - phase four - wire system , the three - phase static inverter must be adopted
在用电量大或需要三相四线制供电的场合，需要采用三相静止变流器。 |
| 5. | The new standpoint that ip - iq detecting method based on three - phase three - wire system can be directly used in three - phase four - wire system is presented and proved . generalized harmful currents compensation based on multilevel converter and multi - band hysteresis pulse width modulation with timer are presented
提出并证明了基于三相三线制系统的ip - iq检测法可直接用于不平衡三相四线制系统有害电流的检测，无需事先剔除零序电流的新观点。 |
| 6. | Three phase ac reactive power display control instrument ; single screen digital display ; outline dimension 16080mm ; no communication interface ; no transmit output ; three - phase four - wire system connection mode , high limit alarm low limit alarm ; switch power supply ; input voltage 0380v ; input current 05a , display reactive power 0114 . 0k var
三相交流无功功率显示控制仪:单屏数字显示外形尺寸16080无通讯接口无变送输出三相四线制接线方式，上限报警下限报警开关电源供电输入电压0 380v ，输入电流0 5a ，显示无功功率0 114 . 0kvar , |
| 7. | Three phase ac active power display control instrument ; single screen digital display ; outline dimension 16080mm ; no communication interface ; no transmit output ; three - phase four - wire system connection mode ; high limit alarm low limit alarm ; switch power supply ; input voltage 0380v ; input current 05a ; display active power 0114 . 0kw . 2 . wp - le3q - c2004hlt 380v 380v , 100a 5a
三相交流有功功率显示控制仪单屏数字显示外形尺寸16080无通讯接口无变送输出三相四线制接线方式;上限报警下限报警开关电源供电,输入电压0 380v ;输入电流0 5a ;显示有功功率0 114 . 0k w 。 |
| 8. | The detecting techniques of harmful currents , the modulation methods of novel upfc and the balancing control of capacitors voltage on dc link are studied thoroughly . in order to be fit for three - phase four - wire system , the method of balancing control using chopper presented in literature [ 29 ] is mended
分析了零序和负序电流对新型upfc直流侧电容电压的不同影响，对文献[ 29 ]提出的传统upfc的直流侧各电容电压的均衡控制方法进行了仔细研究，提出了采用b型直流斩波器来控制新型upfc的直流侧电容电压的新方法。 |
