摘要
提出了一种考虑风电能量随机性的配电网可靠性评估新网络模型和快速算法。新网络模型中配电网简化成开关-区域块网络,并分成主网络和支网络2个部分。通过对风电功率的概率特性和支网络故障特性的分析,构造了风电的供电能力范围,并确定了风电对供电能力范围内各区域块的供电次序和供电概率,实现了风电随机出力与其供电能力范围内供电可靠性指标的映射。新的可靠性评估算法区别对待主网络和支网络,利用故障模式影响分析(failure-mode-effect-analysis,FMEA)法计算主网络的可靠性指标,利用元件对可靠性指标的逆流和顺流传递特性计算支网络的可靠性指标,并在可靠性指标的顺流传递中考虑了风电对其供电能力范围的可靠性的定量影响。算例仿真验证了该方法的有效性。
A novel network model and a fast algorithm for distribution system reliability evaluation are presented, which consider the random energy output of wind power generators （WPGs）. The novel model first simplifies the distribution network to a switch-section network, and then divided it into two kinds of parts named as the main-networks and the branch-networks. After analyzing the energy output feature of WPGs and the fault characteristics in branch-networks, the supply area of WPGs is built. Then the order and probability of power supply to the supply area of WPGs are determined, which successfully implemented the mapping from the random output of WPGs to the reliability index of the power supply. The fast reliability evaluation alogrithm calculates the reliability indices of the main-networks using the failure-mode-effect-analysis （FMEA） method, and those of branch-networks using the properties of elements in up-stream and down-stream reliability delivering. Meanwhile, the impact of WPGs on its supply area is counted in computing the downstream reliability indices. Simulation results verfied the effectiveness of the proposed method.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第13期16-22,共7页
Proceedings of the CSEE
基金
国家自然科学基金项目(50677015)~~
关键词
配电网
可靠性评估
风力发电
可靠性指标
随机性
distribution system
reliability evaluation
wind power
reliability index
random
