【摘要】 针对难以利用实际碱性电解槽进行可再生能源电解水制氢系统研发的问题，搭建一种用于模拟电解水制氢的半实物仿真实验平台。该平台采用由S7-400PLC、上位机及虚拟对象计算机构成的硬件架构，通过以太网和现场总线进行通信。建立模块化碱性电解槽的电压、氧中氢、温度、产气量及分离器压力模型，并在压力和液位控制回路中采用分程控制策略，以实现压力、液位的平衡控制。最后，在恒流工况下进行制氢过程模拟，验证平台在温度、压力及液位环节的有效控制。结果表明：所设计仿真平台在恒流工况下，能够模拟出电解水制氢启停过程电压、电流、氧中氢浓度、压力、温度和液位等输出特性；所设计的闭环控制回路能够实现被控量的稳定控制，碱液温度能稳定控制在设定值±1℃以内，氢氧分离器压力能快速跟踪设定值并保持稳定，同时氢氧液位差被成功控制在3 mm以内，验证了控制策略的有效性。该平台为可再生能源制氢系统的宽功率波动特性相关研发提供了可靠的实验基础。更多还原

【Abstract】 To address the problem that it is difficult to use actual alkaline electrolyzers for developing renewable energy-powered electrolytic water hydrogen production systems, a hardware-in-the-loop simulation platform for simulating the hydrogen production process was constructed.The platform employed a hardware architecture consisting of an S7-400PLC,an upper computer, and a virtual object computer, which were connected via Ethernet and fieldbus.Mathematical models for the voltage, hydrogen-in-oxygen concentration, temperature, gas production rate, and separator pressure of the modular alkaline electrolyzer were established.In the pressure and liquid-level control circuits, a split-range control strategy was adopted to achieve balanced control of pressure and liquid level.Finally, the hydrogen production process was simulated under constant-current conditions, and the effective control of temperature, pressure, and liquid level by the platform was verified.The results show that the designed simulation platform can simulate output characteristics such as voltage, current, hydrogen-in-oxygen concentration, pressure, temperature, and liquid level during the start-stop process of hydrogen production by water electrolysis under constant-current conditions, and the designed closed-loop control circuit can achieve stable control of the controlled variables.This provides a reliable experimental platform for the research and development of wide power fluctuation characteristics in renewable energy hydrogen production systems.更多还原