海洋核动力平台电网安全问题及保护技术研究

Study on security problems and protection technologies of the floating nuclear power plant grid

海洋核动力平台电力系统是发电、站内供电和系统外送电能高度集成的独立电力系统,具有工作环境恶劣、故障形式复杂、设备维修困难、电能中断敏感等特点。结合理论分析与仿真实验对海洋核动力平台电网安全问题及相关保护技术进行分析研究。提出协同多模接地控制的中性点接地方式、平台网源直连系统接地保护方法、串接小容量变压器预充磁方案以及基于Petri网和MPGA(多种群遗传算法)的网络重构方法。研究结果拟为海洋核动力平台电力系统的工程设计和保护方案提供技术支撑。

The floating nuclear power plant grid is an independent power system composed of power generation,in-station power supply and external power delivery.It has the characteristics of bad operating environment,complex fault forms,difficult equipment maintenance and sensitive power interruption.Combined with theoretical analysis and simulation experiments,this paper analyzes and studies the security problems and protection technologies of the floating nuclear power plant grid.The technologies of neutral-point grounding mode in cooperation with multi-mode grounding control,grounding protection of source and gird directly connected system,the series connected small-capacity transformer-based pre-magnetization technology are proposed.A network reconstruction method based on Petri net and MPGA is proposed.The research results can provide technical support for an engineering design and protection scheme for the floating nuclear power plant power system.