Analysis of a DC bus loss of power and its solutions in the power substation
一起变电站直流母线失电原因分析及解决方案
To ensure the reliability of DC system,the insulation status of DC bus must be entirely monitored online.
为了保障直流系统的安全可靠运行,通常发电厂、变电站使用的直流系统绝缘监测装置是通过检测对称电桥的不平衡程度来反映直流母线的绝缘情况,但当正负母线绝缘均按比例下降时就失效。
However,the use of multi-inverter wiring with a common DC bus, make the power feeding back can be absorbed by other electric motor,and the excess electricity can also be feedback to the power grid through the feedback device,so that power can be fully utilized.
但是采用了多逆变器公用直流母线的接线方式后,电机回馈制动所产生的能量可以被其他电动状态的电机吸收,而且多余的电能还能够通过回馈装置回馈电网,使电能得到充分的利用。
Firstly, triangular facet model is used to present a complex surface, and its quasi-rulings are computed.
首先把CAD/CAM常用的参数曲面转化为三角剖分模型,求出曲面的伪直母线;然后基于伪直母线对曲面进行自适应分片;最后展开每一片曲面区域。
In this paper,a new method for development of hull plate surface based on its quasi-rulings is presented.
本文提出了一种基于伪直母线的船体曲面钢板展开方法。
The paper proves that the surface normal,which is followed by rectilinear generators on hyperboloid of on sheet,comstructs the hyperbolic paraboloid generated by two same parabola,when rectilinear generators go through the vertex of waist ellipse,and it also deduces that the hyperboloid of one sheet is constructed by surface normal through a certain rectilinear generator.
证明了当单叶双曲面的直母线过腰椭圆顶点时,沿着它的曲面法线构成一个由二全等抛物线生成的双曲抛物面,并推导出对单叶双曲面,沿着它的任一直母线,曲面的法线均构成双曲抛物面。
Some properties on rectilinear generators of hyperboloid of one sheet are researched.
给出并证明了单叶双曲面的直母线的若干性质 ,讨论了单叶双曲面与其渐近锥面的直母线之间的关
It proves the three special natures of rector radius the vecfor of rectilinear generator and the two vectors on ruled surface derived cur
证明了直纹面导线上向径和直母线上单位向量与此二向量的切向量的三个特殊性
This article discussed the rationalization which ruled surface satisfied (a′(u),b(u),b′(u))=0 is developable surface r(u,v)=a(u)+vb(u) and verifies that only bunch of ruling of a ruled surface is essential condition but not full condition of developable surface.
探讨了满足条件 (a′(u) ,b(u) ,b′(u) ) =0的直纹面r(u ,v) =a(u) +vb(u)为可展曲面的合理性 ,验证了只有一族直母线是可展曲面的必要但不充分条
The Design and Application of Common DC Bus Power Supply
公共直流母线供电电源的设计与应用
Design Principle and Application of Common DC Bus SPDMR
共用直流母线SPDMR的设计原理及应用
The Modeling and Simulation of Common DC Bus System Based on PWM Rectifier
基于PWM整流器的直流母线系统建模与仿真
PEEC modeling of complex DC buses in high power converters
大容量变流器复杂形状直流母线的PEEC建模
Study on the Design of the Measurement and Control System of a DC-Bus Electrically Closed Gearbox Test-bench;
直流母线电封闭变速箱试验台测控系统的设计
Analysis of a DC bus loss of power and its solutions in the power substation
一起变电站直流母线失电原因分析及解决方案
Calculation of Electric Potential and Field Distribution of UHVDC Bus Bar MOA
特高压直流母线MOA的电位与电场分布计算
Research on DC link neutral point potential balance of inverter
逆变器直流母线侧中点电位平衡的研究
Winch Converter Control System in Dredger Based on Common DC-Link Bus
基于公共直流母线的挖泥船绞车变频控制系统
Application of common DC BUS technology in paper machine's driving system
公共直流母线技术在纸机传动系统中的应用
The linear sampling circuit of direct current bus and the hysteresis voltage comparator circuit are confirmed.
确定了直流母线电压线性采样电路以及迟滞电压比较电路。
Application of Emerson Common DC Bus AC Variable Frequence and Speed Regulating System on Centrifugal Machine
艾默生共直流母线交流变频调速系统在卧螺离心机中的应用
The harmonics damages and disposing solutions of common DC bus frequency conversion drive system
公共直流母线纸机变频传动系统的谐波危害与处理
DC Link Voltage Control of a New Type of Series Voltage Sag Compensator
新型串联型电压跌落补偿装置的直流母线电压控制
Design of Control System for Light-type of Electric Rubber-Tired Container Gantry Crane Based on Common Dc Bus
基于公共直流母线的轻型电动轮胎式集装箱门式起重机控制系统设计
Analysis on the Unbalance Current of HVDC Pole Bus Differential Protection
高压直流极母线差动保护不平衡电流分析
Study of the Voltage Stability of Inverter AC Bus in HVDC System and the Influence of Load Characteristic;
高压直流系统逆变端交流母线电压稳定性及负荷特性影响的研究
double generator of a ruled surface
直纹曲面的二重母线