分布式光伏接入火电厂厂用系统的安全经济性分析  

Empirical analysis of safety and economy of distributed photovoltaic access to thermal power plant service system

作　　者：雷阳 聂思聪 吕小秀 何信林[1] 王海强 倪继文 LEI Yang;NIE Sicong;LYU Xiaoxiu;HE Xinlin;WANG Haiqiang;NI Jiwen(Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China;Xi’an Yitong Thermal Service Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]西安益通热工技术服务有限责任公司,陕西西安710054

出　　处：《热力发电》2024年第5期93-100,共8页Thermal Power Generation

基　　金：西安热工研究院有限公司科研基金项目(TR-23-TYK03)。

摘　　要：传统火电在当前能源结构转型的背景下将逐步转型为网源支撑和系统调节,与分布式光伏的厂用发电耦合是火电企业实现降本增效的一种有效尝试。但因厂用非统调电源的接入暂无相关规程指导,在系统安全稳定方面缺乏评估策略和实证参考。为此,以西北某火电厂的火电光伏互补供能系统为例,分析了其运行特点并给出了稳定性评价的技术框架,在不同机组、并网等级和最小光伏单元布置的实例中,讨论了静态潮流、暂态稳定和电能质量等应用评价问题,计算得到本例场站下火电机组厂用电减损效能实现了18%~42%的提升。该结论对火电厂应用“分布式光伏接入厂用系统”的发电技术模式有着典型的借鉴意义。In the context of current energy structure transformation,conventional thermal power would gradually transform into grid source support and system regulation.Coupling with distributed photovoltaic power is an effective attempt for thermal power enterprises to achieve cost reduction and efficiency improvement.However,due to the lack of relevant guidance for the connection of non centralized power sources for the factory use,there is a lack of evaluation strategies and empirical references for system security and stability.For this purpose,taking the thermal photovoltaic complementary energy supply system of a thermal power plant in northwest China as an example,its operating characteristics are analyzed and a technical framework for stability evaluation is provided.In examples of different power units,grid connection levels,and minimum photovoltaic unit layout,application evaluation issues such as static power flow,transient stability,and power quality are discussed.It is calculated that the power consumption reduction efficiency of thermal power units in this case achieves an improvement of 18%~42%.This conclusion has typical reference significance for the application of the power generation technology model of“distributed photovoltaic access to plant use systems”in thermal power plants.

关 键 词：分布式光伏 厂用系统 节能降耗 火电厂 

分 类 号：TM61[电气工程—电力系统及自动化]