摘要
基于风光火打捆高压直流外送的送端电网场景,分析了风、光接入对电网系统动态频率及风光的低惯量、随机波动等给高频切机整定的影响;最终评估了风光火无序切机易出现的电网二次扰动、切机量增加以及稳定性恶化等问题,提出了安全及经济性的风光火混合类型电源高频切机顺序原则和整定方案,并结合宁夏电网进行了仿真验证。
Based on typical sending system scene of wind-PV-thermal-bundled power outward trans- mitting in HVDC,the influence of wind and PV power integrations on dynamic frequency of the grid system and the impacts of wind and PV power low inertia and random fluctuations on setting of the over frequency generator tripping are analyzed. The results show that the disarrangement unit tripping easily causes secondary disturbances, increased unit tripping frequency and worsened stability etc. The over frequency generator tripping sequence principles and its setting scheme of wind-PV-thermal combined power generation units are proposed to achieve a safe and economical operation of the system. The sim- ulation verification is carried out in Ningxia power grid.
出处
《可再生能源》
CAS
北大核心
2015年第10期1492-1498,共7页
Renewable Energy Resources
基金
国家电网公司大电网重大专项资助项目课题(SGCC-MPLG001-2012)
国家电网公司科技项目(XT71-14-040)
国网宁夏电力公司科技项目(XTB11201402108)
关键词
风光火打捆系统
频率特性
高频切机原则
wind-PV-thermal-bundled power system
frequency characteristics
high-frequencygenerator tripping principles
