摘要
针对主动配电系统(active distribution system,ADS)中分布式电源(distributed generation,DG)的间歇性和主动负荷及储能系统(energy storage system,ESS)的可控性特点,基于ADS的最大供电能力(ADS’s total supply capability,ATSC)提出一种评价ADS安全性的安全等级划分方法。首先,提出了节点多性质的ADS最大供电能力求解模型,引入DG及ESS的相关约束,并将其中的非线性约束转化为旋转锥的笛卡尔乘积约束形式,用锥优化方法进行快速计算。其次,基于静态安全分析定义了安全裕度、主动负荷熵、主动调节率及主动安全度指标,结合失负荷率及越限指标构成评价指标体系,进而提出了ADS安全等级划分方法,并用该方法将ADS划分为5个安全等级。用粒子群算法对主动负荷进行优化并用一致性主动控制方法制定储能系统充放电策略,应用该文提出的评价方法对比优化前后配电网的安全等级情况,验证了所提方法的实用性及有效性。
Considering the intermittency of distributed generations （DGs） and the controllability of active load and energy storage system （ESS） in the active distribution system （ADS）, a method of security classification based on the ADS＇s total supply capability （ATSC） to evaluate the security of the ADS was put forward. Firstly, the ATSC model with the multiple properties of nodes was proposed including the constraints of DG and ESS. Meanwhile, in order to adopt cone optimization to obtain the ATSC, the nonlinear constraints were converted to the cartesian product of the rotating cone. Secondly, the safety margin, active load entropy, active adjust rate and active safety index were defined based on static security analysis, combining it with the load of loss rate and the threshold crossing rate, the evaluation index system Was composed. Then the security classification method of the ADS was proposed, according to which, the ADS was divided into five security levels. Finally, the particle swarm optimization was used for the active load and the method of consistence active control was used for charge-discharge strategy of the ESS. The practicality and effectiveness of the proposed method were verified by the contrast of the safety level＇s change before and after the optimization.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2017年第9期2539-2550,共12页
Proceedings of the CSEE
基金
国家自然科学基金项目(61374098
61304183)
高等学校博士学科点专项科研基金资助项目(20131333110017)~~
关键词
主动配电系统
锥优化算法
最大供电能力
安全性指标
安全等级划分
安全性评价
active distribution system
the conic programming
total supply capacity
security indices
security level
security evaluation
