Analysis on influence of power grid structure upon short circuit level and power receiving capability 电网结构对短路电流水平及受电能力的影响分析
The grid circuit is out of order. 栅极电路发生故障。
In this paper, a new approach to generating two types of grid multi-scroll chaotic attractors from canonical Chua's circuit is reported. 提出了在规范型蔡氏电路中生成两种不同类型网格多涡卷混沌吸引子的新方法。
Analysis and Improvement of the Design for the High Voltage Power Grid Bus-double Circuit Breaker Failure Protection Loop 高压电网双母线接线断路器失灵保护回路设计分析与改进
Silicon grid PMOS type integrated circuit 硅栅pmos集成电路
A grounding grid can handled as a circuit network. With the application of circuit network graph theory and the fault diagnosis theory of analog circuit and optimization, the fault diagnosis equations can be set up. 将接地网等效成纯电阻网络,运用电网络理论、模拟电路故障诊断理论以及最优化技术,建立接地网的故障诊断方程组。
For Shanghai power grid, which has large short circuit capacity and short electrical distance, a method using imported instrument to test power frequency variation distance protection is presented. 结合上海电网具有短路容量大、电气距离短的特点,提出了使用进口仪器测试工频变化量距离保护的具体方法。
In order to reduce the background resulting from the dark current of the photomultiplier and the grid current of amplifer, a special design of auto-compensation circuit is provided. 为减小光电倍增管暗电流和放大器栅流产生的仪器自身本底,设计了随温度变化的自动补偿电路。
The intelligent low energy electron sensor system principle of work, the specific request to the electronic control circuit of double grid air counter, each part of circuits design in electronic control circuit have been discussed. 讨论了智能型低能电子传感器系统工作原理,双栅极空气计数器对电子控制电路的具体要求,电子控制电路中各部分电路的设计。
Based on the configuration of quasi-optical grid arrays and basic 2-port circuit theory, the equivalent circuit model of grid oscillators was synthesized to satisfy the oscillation requirement, and completed negative-resistance grid model of the embedding circuit. 从准光栅格阵列的结构和基本电路理论入手,综合分析了振荡器栅格的等效电路模型,完成了嵌入电路的负阻栅格模拟。
Principle of Grid Constant Temperature Control Electric Circuit 栅极恒温控制电路原理
This paper analyses the first winding of transformer at the end of grid open circuit, and puts forward failure criterion. 分析了电网末端电力变压器原边缺相故障特征,并提出了故障判据。
Since the limited grid control technology is applied, the 2 point type, non trap circuit becomes possible. 由于采用了软栅极控制技术,使二点式、无吸收电路成为可能。
Analysis and Application about the Characteristics of IGBT Grid Driving Circuit IGBT栅极驱动电路的特性分析和应用
And then proposed basic principle and implementation procedure of phase lead anti-islanding detection method with inverter grid equivalent circuit according to islanding IEEE Std. 按照孤岛效应的国际通行标准,结合逆变器并网的等效电路给出了相位超前的反孤岛检测方法及其基本原理和实现过程。
Taking the design of the auxiliary power supply unit for maglev train as an example, the author highlights the ramp compensation circuit and MOSFET grid drive circuit, and optimizes the design of the compensation network for error magnifier. 通过磁悬浮列车辅助电源的设计实例,着重分析了斜坡补偿电路和MOSFET栅极驱动电路,并对误差放大器补偿网络进行了优化设计。
A discussion on scheme of improving structure of East China power grid to reduce short circuit capability 关于改善华东电网结构、降低短路容量方案的探讨
According to the principles of grid development planning and technical retrofit planning, the integrated automation system will continue to be widely used for EHV grid controlling, and the objects under remote control will expand from circuit breakers to disconnectors and grounded disconnectors. 按电网发展规划和技术改造规划的原则,超高压电网的控制运行方式将继续广泛采用综合自动化系统,远方遥控的对象也从断路器扩展到闸刀和接地闸刀。
As the "west to East power transmission" hub in the East China Grid, the problem of short circuit current exceed the standard is more prominent in the Pingyao substation. 瓶窑变作为华东电网西电东送的枢纽变,短路电流超标问题一直较为突出。
In recent years, the development of electric power systems leads to a continuous expand of the grid scale and a growth of short circuit currents, which imposes a stringent requirement on grounding design. 近年来随着电力系统的不断发展,电网规模的持续扩大,接地短路电流越来越大,对接地提出了更高的要求。
As the basis of smart grid components, intelligent circuit breaker became a hot research topic in the field of low voltage electrical recent years. 智能断路器作为智能电网中的基础部件,一直是近几年来低压电器领域的热门研究课题。
In order to reduce the influence of harmonic wave on power grid, using the power factor correction ( PFC) circuit is one of the feasible methods. 为了减轻谐波对电网的影响,采用功率因数校正(PFC)电路是遏制谐波的可行方法之一。
According to the requirements of the current and signal filter in the grid, the current-limiting resistance, the signal filtering inductance and the protecting circuit have been designed. 根据射频电源电子管栅极电流以及栅极信号滤波的要求,设计出了合理的栅极限流电阻,栅极滤波电感以及保护电路的参数。
In order to operate the power grid flexibly and open the fault circuit rapidly, DC Switch is particularly important and will be very broad application prospect. 大容量直流开关作为直流电网灵活操作,故障时快速重构的重要部件,应用前景将十分广阔。
With the increase of the load density and capacity of the power grid in China, short circuit current has become evident large, compared to the breaking capacity of high voltage ( HV) circuit breakers, and this has also become critical problem to need solving urgently. 随着我国电网负荷密度的增大和总体容量的增长,短路电流超过断路器遮断水平已成为亟待解决的问题。
For the asynchronous wind power generator, a solution is presented as a variable speed wind turbines system, which is interconnected to power grid through rectifying circuit and inverter unit. 针对异步风力发电机,提出一种针对定桨恒频风力发电机组变速运行系统,并对其接线形式、运行方式及协调控制进行了讨论,并给出了仿真结果。
The circuit is designed based on the new grid multi-scroll chaotic model using the basic computing circuit and related components. the corresponding relationship in circuit parameters and system parameters is established too. 然后基于这个新的网格多涡卷混沌模型,利用基本运算电路和相关元件进行了电路设计,并建立了电路参数与系统参数的对应关系。
With fast development of power grid and rapid increase of electricity load in China, the short circuit current level has been getting more and more critical, which has produced a serious threat to the security, reliability and stability of power systems. 随着中国电网的快速发展以及用电负荷的迅速增加,短路电流水平不断提高,已严重威胁到电力系统的安全、可靠与稳定运行,研制高压大容量化故障限流器势在必行。