phase voltage中文什么意思

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1. Through theoretic reckoning and simulating analyzing , several control strategies for shunt apf were compared and chose ip - iq arithmetic of the instantaneous reactive power theory control strategy as the right scheme to produce the instructing current . based on it , some new control arithmetic was subjoined to suppress the resonance in system and balance the dc side capacitor voltage . two topologies of main circuit were compared and chose the three - phase voltage - source converter with a split - capacitor as its main circuit structure
   通过理论计算和仿真分析，比较了并联型apf的几种控制策略的优点和缺点，从中选择瞬时无功理论控制策略i _ p - i _ q计算方式为指令电流产生的算法，并在此基础上增加了抑制系统谐振和平衡直流侧电容电压的控制；比较了并联型apf主电路的两种常见形式，从中选择了三相电压型变流器的主电路形式；算出适合该apf的直流侧电容和出线电感的参数；设计出能有效消除apf产生的高次谐波的高通滤波器。
2. Wp - le series intelligent power instrument input and measurement parameter scope include : dc voltage , dc current , ac single phase voltage , single phase current , tri - phase voltage , tri - phase current , single phase active power , single phase reactive power , tri - phase active power , tri - phase reactive power , single phase active electric energy , single phase reactive electric energy , tri - phase reactive electric energy , power factor power frequency and so on
   Wp le系列智能电力仪表输入及测量电参数范围包括：直流电压直流电流交流单相电压单相电流三相电压三相电流单相有功功率单相无功功率三相有功功率三相无功功率单相有功电能单相无功电能三相有功电能三相无功电能功率因数cos工频频率等。
3. The paper analyzed the basic theory and mathematic model of three phase voltage pwm inverter and proposed one kind of control strategy based on the voltage - current double - loop . it used the exterior loop to control the voltage the eps outputted , and used the inner loop to control the current . simulation testified that the control method could improve the dynamic response character and interference rejection ability
   在建立三相电压型pwm逆变器在两相同步旋转坐标系下的数学模型的基础上,提出了一种三相电压型pwm逆变器基于电压电流双闭环的控制方法,利用电压外环实现对输出电压的稳定控制,电流内环实现对输出电流的控制,仿真证明该方法有效地改善了系统的动态响应及抗干扰能力。
4. Monitor apparatus can measure valid value of three phase voltage and current , power factor , three phase disequilibrium , instant flecker of short time and harmonic without twenty , degree and harmonic distortion total . the paper are laid on the following . ( 1 ) master plan and function of circuit , ( 2 ) hardware design including circuit and principle of a / d conversion , phase lock , liquid crystal display and keystroke and so on , ( 3 ) design of system software including digital filtering , fft , a / d conversion and monitor interface of pc , ( 4 ) system test
   监测仪能够完成包括三相电压、三相电流的有效值、功率因数、三相不平衡、电压短期闪变、以及20次内的谐波、谐波相位、谐波失真总量等的测量。论文重点介绍了以下几部分： ( 1 )电路的总体设计和功能； ( 2 )硬件设计，包括a d转换、锁相环、液晶显示和按键输入等原理和电路。 ( 3 )系统软件设计，包括a d转换、 fft 、数字滤波等程序的原理和算法以及上位机监控界面的设计； ( 4 )系统测试。