晶闸管参数选用原则

针对工厂控制设备维修中涉及到晶闸元件选用问题,阐明晶闸管几个主要性能参数的实际意义。     

Design and analysis of tilt integral derivative controller with filter for load frequency control of multi-area interconnected power systems

In this paper, a novel Tilt Integral Derivative controller with Filter (TIDF) is proposed for Load Frequency Control (LFC) of multi-area power systems. Initially, a two-area power system is considered and the parameters of the TIDF controller are optimized using Differential Evolution (DE) algorithm employing an Integral of Time multiplied Absolute Error (ITAE) criterion. The superiority of the proposed approach is demonstrated by comparing the results with some recently published heuristic approaches such as Firefly Algorithm (FA), Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) optimized PID controllers for the same interconnected power system. Investigations reveal that proposed TIDF controllers provide better dynamic response compared to PID controller in terms of minimum undershoots and settling times of frequency as well as tie-line power deviations following a disturbance. The proposed approach is also extended to two widely used three area test systems considering nonlinearities such as Generation Rate Constraint (GRC) and Governor Dead Band (GDB). To improve the performance of the system, a Thyristor Controlled Series Compensator (TCSC) is also considered and the performance of TIDF controller in presence of TCSC is investigated. It is observed that system performance improves with the inclusion of TCSC. Finally, sensitivity analysis is carried out to test the robustness of the proposed controller by varying the system parameters, operating condition and load pattern. It is observed that the proposed controllers are robust and perform satisfactorily with variations in operating condition, system parameters and load pattern.     

基于晶闸管的中压固态开关触发技术

介绍晶闸管触发技术在固态开关中的应用,指出电控晶闸管的不足之处,提出光控晶闸管在固态开关中的应用优势。     

基于TCA785和FPGA的触发器设计

以晶闸管构成的全桥整流电路为对象,分析和建立了两种触发器以实现对晶闸管的触发控制。一种是以TCA785为核心芯片的模拟触发器,另一种是以可编程逻辑阵列(FPGA)为核心芯片的数字触发器。试验表明两种触发器都具有良好的性能,并且由模拟触发向数字触发的方向发展。     

晶闸管整流变压装置在湿式静电除尘器中的应用

简要介绍了具有专利技术的湿式高压静电除尘装置IWS的工作原理、工艺流程和具体结构.根据多依奇集尘效率公式,详细阐述了NWL公司生产的晶闸管自动控制装置控制高压硅变压整流装置的原理,以及控制IWS湿式静电除尘器的方法.最后分析了对设备进行检修时的一些常用方法和进行维修保养时应该注意的有关事项.实践证明,该静电除尘器具有除尘效率高、无二次污染等优点,值得在国内推广和应用.     

容性负载晶闸管调压电路的触发方式研究

本文通过一个实际问题的研究解决,给出了电阻-电容性负载交流调压电路中晶闸管正常工作所必需的一种独特触发方式,并指出其应用前景。     

A novel technique of using a thyristor driven pump as the final control element and flow indicator of a flow control loop

In the present paper, design of a flow control loop using a thyristor driven pump as final control element has been described. In this technique, the load current of a thyristor driven pump motor has been utilized as a mass flow sensing parameter of a fluid passing through a pipeline. This thyristor driven pump has been utilized as a final control element of a flow control loop and the speed of the pump has been selected as the manipulated variable. The non-linearity between the thyristor input signal and pump output has been eliminated by using a modified PID control technique with inverse derivative control action. Thus without using any conventional flow meter and control valve only the thyristor driven pump has been utilized both as the final control element and flow indicating device by using the proposed technique. The whole system has been designed, fabricated and tested by using tap water as the flowing liquid through a pipe line. The experimental results along with the theoretical analysis are compared and reported in the paper.     

用于静电除尘的新型三相恒流源

在静电除尘应用领域,设计了一种的新型三相恒流源。电源采用可控硅相控与LCL谐振电路相叠加的结构,具有对恒流源的电流可以连续调节的特点。此外,针对闪络时刻冲击电流高的问题,专门设计了火花电流抑制模块,对冲击电流在1us内进行抑制,保证了电源的恒流特性。电源输出电压高,输出电流稳定,为今后的静电除尘电源侧的选择,提供了一种方案。     

芬兰KONE40t门座起重机结构及电气设备

我国从芬兰ＫＯＮＥ公司引进的一批４０ｔ门座起重机，系新颖的港口设备。本文介绍了ＫＯＮＥ门座起重机的机械结构特点，电气设备的配置和控制特点     

基于电容电压同步下TCSC暂态特性的数学描述

当选择电容电压作为同步信号时 ,可控串被 (TCSC)的暂态过程会出现明显的超调和振荡 ,对于这一现象 ,前人还从未给出相应的机理解释。该文以晶闸管导通角为建模对象 ,采用拓扑建模法建立了能描述电容电压同步下TCSC暂态特性变化规律的二阶差分数学模型。借助该模型可分析影响暂态过程的相关因素 ,进而从本质上揭示了电容电压同步下TCSC的暂态机理。数字仿真结果验证了所建模型的正确性。