摘要
设计了一种通过马尔科夫链对风电并网系统进行运行稳定性分析的高效方法,通过MATLAB软件对改进后的IEEE-RTS79系统实施仿真,根据源-网-荷不确定性因素评价了马尔科夫链风电并网系统的运行状态与稳定性。结果表明:采用风电并网方式获得的计算时间相对于蒙特卡洛算法发生了明显缩短,在各场景下得到的系统运行状态概率解析结果和统计变化结果相符。处于恒定的负载状态下,接入风电场后使系统获得了更高的发电裕度,可以利用风电场来取代传统的电源实现稳定供电的过程,使系统功率保持恒定状态,系统更易实现正常运行过程,显著改善系统运行可靠性,采用风电并网方式可以使系统获得更稳定的供电性能。处于恒定负载状态下,采用风电并网方式能够对电网功率不平衡状态发挥明显平抑作用,提高了系统状态分析过程的复杂程度。
An efficient method was developed to analyze the operation stability of the wind power integration system through the Markov chain.The improved IEEE-RTS79 system was simulated by Matlab,and the operation state and stability of the wind power integration system with the Markov chain were evaluated according to the source-network-load uncertainty factors.The results showed that the calculation time obtained in this method was significantly shorter than that obtained by Monte Carlo algorithm,and probabilistic analytical results of system operation state obtained under various scenarios were consistent with the results of statistical changes.Under the state of constant load,wind farm access to the system gave higher power generation margin,and the wind power farm could replace the traditional power source to realize stable power supply,maintain system power in a steady state,and make it easier to realize normal system operation,thus remarkably improving system operation reliability.The proposed wind power integration method could enable the system to obtain more stable power supply performance.Under the condition of constant load,the wind power integration approach could obviously suppress grid power imbalance,and make system state analysis process more complicated.
作者
林志艺
Lin Zhiyi(State Grid Xiamen Power Supply Co., Xiamen Fujian 361001, China)
出处
《电气自动化》
2020年第6期17-19,共3页
Electrical Automation
关键词
风电并网
系统运行
马尔科夫链
可靠性
评估分析
wind power integration
system operation
Markov chain
reliability
evaluation analysis
