光热发电系统简化动态模型与一次调频能力分析  

Simplified Dynamic Model and Primary Frequency Regulation Capability Analysis of Concentrated Solar Power System

作　　者：王杨 关智文 姚凌翔 罗抒予 肖先勇[1] WANG Yang;GUAN Zhiwen;YAO Lingxiang;LUO Shuyu;XIAO Xianyong(College of Electrical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电气工程学院,四川省成都市610065

出　　处：《电力系统自动化》2024年第24期112-123,共12页Automation of Electric Power Systems

基　　金：国家自然科学基金联合基金重点项目(U2166209)。

摘　　要：光热发电是一种灵活性很强的清洁能源发电技术,在新型电力系统中具有广泛的应用场景。然而,由于缺乏合适的动态模型,光热电站在电力系统中的动态运行特性和调频性能尚不清晰。针对上述问题,考虑光热发电系统特有的能源供应模式、组件结构以及控制系统,提出了一种适用于电力系统动态分析的光热发电系统简化动态模型。相较于传统火力发电系统的简化动态模型,其在捕捉蒸汽压力、功率和蒸汽流量的动态特性方面有显著的提升。使用某50 MW光热电站实际运行数据对所提出的模型进行验证,结果表明传统火力发电系统的经典模型无法准确反映光热发电系统的动态特性,而提出的简化动态模型模拟准确度和计算效率俱佳。此外,基于提出的简化动态模型量化分析了光热发电系统在不同运行工况下的一次调频能力,研究了机组负荷大小、压力设定模式和主蒸汽温度对系统一次调频性能的影响,明确了机组处于低熔盐温度、低出力负荷等蓄能不足状态时,通过辅助手段提升系统频率调节能力的必要性。Concentrated solar power(CSP)is a highly flexible clean energy generation technology with broad application prospects in the new power system.However,due to the lack of appropriate dynamic models,the dynamic operation characteristics and frequency regulation performance of CSP plants in the power system remain unclear.To address this issue,considering the unique energy supply mode,component structure and control system of the CSP system,a simplified dynamic model suitable for the dynamic analysis of the power system is proposed.Compared with the traditional simplified dynamic models of thermal power power generation system,the proposed model significantly improves in capturing the dynamic characteristics of steam pressure,power and steam flow.This paper validates the proposed model using actual operation data from a 50 MW CSP plant.The results show that the traditional models of thermal power generation system fail to accurately reflect the dynamic characteristics of CSP systems,while the proposed simplified dynamic model exhibits high accuracy and computational efficiency.Furthermore,based on the proposed simplified dynamic model,the primary frequency regulation capability of the CSP system under different operation conditions is quantitatively analyzed.The impact of unit load size,pressure setting mode,and main steam temperature on primary frequency regulation performance of the system is investigated,clarifying the necessity of utilizing auxiliary methods to enhance frequency regulation capacity of the system when the unit is under conditions of insufficient energy storage such as low molten salt temperature and low output load.

关 键 词：新型电力系统 光热发电 简化建模 动态模型 一次调频 实测验证 

分 类 号：TM615[电气工程—电力系统及自动化]