摘要
针对风能存在随机性和波动性,风电场并网对电力系统运行可靠性有一定影响,考虑风力发电机输出功率特性、强迫停运率和输电线路及发电机的故障失效等因素,把风力发电机可靠性模型与发输电可靠性模型相结合,采用基于直流潮流的最优切负荷算法,建立了基于非序贯蒙特卡罗方法的风电场发输电可靠性模型,来评估风电场并网后的发输电系统可靠性。以IEEE-14节点标准可靠性测试系统为例,对风电场以不同接入方式和不同接入容量的条件下分别计算系统负荷削减概率PLC、期望缺供电量EENS、期望负荷削减频率EFLC等风险评估指标,计算结果表明:风电场的不同接入方式和容量对发输电系统的风险评估有不同的影响。
Wind field always affects the reliability of power system because wind energy has features of randomness and fluctuation. In considering of some factors such as wind generator power output characteristics, forced outage rate and fault failure of transmission lines and generator, the wind turbine reliability model and the reliability model of composite generation and transmission were combined together and DC optimal cutting load algorithm was adopted to establish non - sequential monte carlo method of wind power transmission reliability model in order to assess generation and transmis- sion system reliability after parallel operation. Taking IEEE-14 node reliability test system as an example, load reduction probability PLC, power supply EENS, expected insufficient expected frequency of load curtailment EFLC risk assess- ment index and so on were calculated under different access methods and different wind field capacity. The results show that different access modes and capacity of wind electric field had different effects on the risk assessment of power gener- ation and transmission system.
出处
《水电与新能源》
2013年第1期66-69,78,共5页
Hydropower and New Energy
关键词
发输电可靠性模型
非贯序蒙特卡洛法
最优切负荷
风险指标
transmission reliability model
non sequential Monte Carlo method
optimal load-shedding
risk index
