传统本质安全电源输出功率较小，难以满足大功率化的发展需求。Power-i电源可实现本质安全大功率输出，但尚无适用于该电源的本质安全性能评价装置。因此，研制Power-i电源本质安全性能测评装置有助于完善大功率本安电源评价体系，具有重要理论研究意义及工程应用价值。

在分析本质安全电路火花放电形式与引燃理论的基础上，深入探究了Power-i技术限制火花放电能量实现本安电源大功率输出的机理，基于标准 IEC TS 60079-39指出安全有关最大参数、响应时间、评定系数和瞬态保护特性四项评定指标可用于评价Power-i电源的本质安全性能。分析了评定指标测试需求，提出了Power-i电源本质安全性能自动化测评装置设计方案，对用于获取测试波形数据的数据采集模块、能够模拟故障火花的脉冲发生器模块、可调节被测电源输出功率的模拟负载模块、用于测试电源瞬态保护特性的瞬态脉冲试验仪及人机交互模块等进行了软、硬件设计。为提高脉冲发生器可靠性并保证脉冲质量，设计了脉冲发生器前级环路补偿参数，分析了其动态工作范围内的工作模式与最大纹波，并据此得出相关元件参数的设计方法。为提高测评装置的自动化水平，采用了一种基于示波器、微控制器和网络通信功能的数据采集方案，设计了网络接口层硬件电路，移植了LwIP协议栈，基于示波器指令完成了应用层程序设计；针对装置中的可变负载和可变电阻，设计了程控电阻器。为准确地分析响应时间大小以及判断电源关断模式参数是否符合要求，设计了响应时间检测及关断模式判断算法。基于测评装置提出了各项评定指标的测试方法以及综合考虑各项指标的评价方法，并设计了自动化测试、评价流程。

制作了一台Power-i电源本质安全性能测评装置，测试了该装置关键模块的电气性能。采用所研制装置测评了Power-i电源本质安全性能，并通过爆炸性试验检验了测评装置的评价结果，实验验证了理论分析的正确性和设计方法的可行性。

The traditional intrinsically safe power supply has low output power, which is difficult to meet the demand of high-power development. The Power-i power supply can achieve intrinsically safe high-power output, but there is no device suitable for evaluating the intrinsic safety performance of the power supply. Therefore, the development of Power-i intrinsically safe power supply test and evaluation device is helpful to improve the high-power intrinsically safe power supply evaluation system, which has important theoretical research significance and engineering application value.

Based on the analysis of the spark discharge form and ignition theory of intrinsically safe circuits, the mechanism of Power-i technology limiting spark discharge energy to achieve a high-power output of intrinsically safe power supply was studied. Based on the Standard IEC TS 60079-39, it was pointed out that the safety-related maximum parameters, the response time, the assessment factor, and the transient protection performance can be used to evaluate the intrinsic safety performance of Power-i power supplies. After analyzing the test requirements of the evaluation indexes, the design scheme of the automatic evaluation device for the intrinsic safety performance of Power-i power supply was proposed, and the software and hardware design of each test and evaluation module was completed, which mainly included a data acquisition module used to obtain test waveform data, a pulse generator module for simulating fault sparks, a simulated load module that can adjust the output power of the power supply under test, a transient pulse tester for testing the transient protection characteristics of the power supply, a human-machine interaction module, and so on. In order to improve the reliability of the pulse generator and ensure the pulse quality, the loop compensation parameters of the front stage of the pulse generator were designed, the working mode and the maximum ripple in the dynamic working range were analyzed, and the design method of the relevant component parameters was obtained accordingly. To improve the automation level of the evaluation device, a data acquisition scheme based on an oscilloscope, a microcontroller, and the network communication function was adopted, the hardware circuit of the network interface layer was designed, the LwIP protocol stack was transplanted, and the application layer program design was completed based on oscilloscope instructions; For the variable load and variable resistance in the device, the programmable resistors were designed. In order to accurately analyze the response time and judge whether the parameters of the power-off mode meet the requirements, a response time detection and off mode judgment algorithm was designed. Based on the evaluation device, the test method of each evaluation index, and the evaluation method of comprehensive consideration the indexes were proposed, and the automatic test and evaluation process was designed.

A test and evaluation device for the intrinsic safety performance of Power-i power supplies was made, and the electrical performance of the key modules was tested. The intrinsic safety performance of the Power-i power supply was evaluated by the developed device, and the evaluation results were verified by the explosive test. The correctness of the theoretical analysis and the feasibility of the design method was verified by the experiment.

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