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- This instrument can measure AC signal frequency either of the single phase voltage or of the tri-phase voltage. 本表既可测交流单相电压信号之频率,亦可测交流三相电压信号之频率。
- In order to measure the VFT phase voltage on three-phase enclosed GIS, 3 capacitance sensors are needed. 为了测量GIS中三相快速瞬态电压，需要三个电容传感器，而每个传感器同时受三相电压的电场耦合。
- In addition, the impulse loads caused voltage wave and flink, and lopsided loads caused imbalance of three - phase voltage. 另外，电力系统中的冲击负荷也引起电压波动和闪变，不对称负荷引起三相电压不平衡。
- Through auto transformation from die bearable phase voltage to a half of the line voltage, the excellent illumination energy conservation mode can be achieved. 通过对照明灯具从承受相电压至承受线电压一半的自动转换，实现最优照明节电模式。
- The equation decribing the relation between operating reactance and secondary operating phase voltage of LF according to results of site test is established. 建立了描述LF炉运行电抗以及二次侧运行相电压的关系式；
- Analysis of dominant electric coupling coefficients on VFT phase voltage measurement in three-phase enclosed GIS[J].Proceedings of the CSEE,2003,23(5):90-94(inChinese). GIS三相同壳母线快速暂态相电压测量中的主导电场耦合系数分析[J].;中国电机工程学报;2003;23(5):90-94
- Li Jinfeng,Li Guangkai,Zhao Chengyong,et al.Control strategy for VSC-HVDC system under unsymmetry of three phase voltage[J].Power System Techology,2005,29(16):16-20(in Chinese). [9]李金丰;李广凯;赵成勇;等.;三相电压不对称时带有电压源换流器的HVDC系统的控制策略[J]
- A phase A fundamental positive sequence voltage selected unit based on LPF substitutes for the original ip-iq PLL to ensure exact voltage of A phase is selected even in case of imbalance three phase voltage. 并采用一种新颖的基于低通滤波的A相正序电压提取单元来代替原始的ip-iq检测法的PLL锁相环,在三相电压畸变情况下仍可以正确提取A相正序电压,以精确检测出谐波和无功电流。
- A better connection for digital protection is also proposed,which takes the inter phase voltage as the input of the directional element at low voltage side and make interior angle setting easier. 最后针对数字式保护的特点 ,采用与中、高压侧相间电压满足同相位关系的低压侧相间电压差作为方向元件的电压量的接线方式 ,提出了一种更好的、使内角整定计算更为方便的功率方向元件的接线方式。
- All of the High Speed Railway (HSR) systems around the world used single phase voltage to the trains, and adopted three-phase to two-phase special transformer to supply electric power. 摘要: 世界各国的高速铁路（HSR）均以单相电源供给列车使用， 大部份是采用三相对两相的特殊接法变压器来供电；
- The amplitude of the fundamental voltage drops across the filtering inductances LN are negligible as compared to the amplitude of the mains phase voltages, the voltages across CN therefore are assumed to be impressed and equal to the mains phase voltages. 当基本电压从滤波电感降低到LN时，振幅与主电源相线电压相比可以忽略不计，因此我们可以认为通过CN处的电压被输送并且等于主电源相线电压。
- In order to measure the VFT phase voltage on three-phase enclosed GIS, 3 capacitance sensors are needed. Each capacitance sensor is coupled with the electric field of three phases voltage. 为了测量GIS中三相快速瞬态电压，需要三个电容传感器，而每个传感器同时受三相电压的电场耦合。
- single - phase voltage source PWM 单相电压型PWM
- It snubs current only when each phase voltages and line voltages are low,so it will not pollute the electric net while general supply snubs current in a short time at high voltage. 该电源只在各相电压和线电压较低的时刻吸收电流,克服了普通整流电源在高电压时短时间吸收电流对电网的污染。
- In order to limit currents, a two phase voltage is applied to an induction machine in rotating state after a brief power outage before full voltages are gradually provided via thyristor switch. 对于旋转状态的感应电机，在短暂断电后重新接入电源时，为了限流，经过晶闸管开关首先接通两相电源施加部分电压，然后逐步过渡到全压。
- The child is going through a difficult phase. 那孩子正经历困难的阶段。
- Considering the imbalance of three phase voltages,a new arithmetic which verifies the generator paralleling based on the synthetic phasor of positive sequence fundamental voltage is proposed. 考虑到三相电压或多或少有些不平衡,提出了一种新的基于正序基波电压合成相量的发电机并网条件核算法。
- The two sets of traffic lights were out of phase. 那两组交通灯不同步。
- The proposed method has been simulated and it proves that rational time of generator paralleling can be forecast in the case of the imbalance of three phase voltages and the fluctuation of slip frequency. 试验表明:文中提出的方法能够在三相电压不平衡和滑差角速度波动时预报出合理的并网时机。
- They have decided to phase in the new techniques. 他们已决定逐步引入新技术。
