电力系统自动化
電力繫統自動化
전력계통자동화
Automation of Electric Power Systems
2015年
22期
110-116,151
,共8页
并网保护%故障判别%孤岛检测%多分类支持向量机%特征选择%概率估计
併網保護%故障判彆%孤島檢測%多分類支持嚮量機%特徵選擇%概率估計
병망보호%고장판별%고도검측%다분류지지향량궤%특정선택%개솔고계
interconnection protection%fault detection%islanding detection%multi-class SVM%feature selection%probability estimates
在配电网出现孤岛、故障等异常情况时，并网保护需要及时断开分布式电源系统与主电网的连接。文中首先分析了并网保护的功能与特点，然后提出了一种基于多分类支持向量机的智能型并网保护方案。该保护方案在传统二分类支持向量机的基础上，建立了并网保护的概率型多分类器模型，实现对扰动、孤岛和故障事件的检测。为了提高模型的泛化能力，采用 SVM-RFE 方法对特征进行选择。最后，从保护的可信赖性与安全性两个方面，利用仿真对所提智能型并网保护与常规保护的性能进行了对比。
在配電網齣現孤島、故障等異常情況時，併網保護需要及時斷開分佈式電源繫統與主電網的連接。文中首先分析瞭併網保護的功能與特點，然後提齣瞭一種基于多分類支持嚮量機的智能型併網保護方案。該保護方案在傳統二分類支持嚮量機的基礎上，建立瞭併網保護的概率型多分類器模型，實現對擾動、孤島和故障事件的檢測。為瞭提高模型的汎化能力，採用 SVM-RFE 方法對特徵進行選擇。最後，從保護的可信賴性與安全性兩箇方麵，利用倣真對所提智能型併網保護與常規保護的性能進行瞭對比。
재배전망출현고도、고장등이상정황시，병망보호수요급시단개분포식전원계통여주전망적련접。문중수선분석료병망보호적공능여특점，연후제출료일충기우다분류지지향량궤적지능형병망보호방안。해보호방안재전통이분류지지향량궤적기출상，건립료병망보호적개솔형다분류기모형，실현대우동、고도화고장사건적검측。위료제고모형적범화능력，채용 SVM-RFE 방법대특정진행선택。최후，종보호적가신뢰성여안전성량개방면，이용방진대소제지능형병망보호여상규보호적성능진행료대비。
When an abnormal event such as islanding or fault occurs in the distribution network,the distributed generation systems should be disconnected from the distribution network by the interconnection protection.This paper starts with the illustration of the functions and characteristics of the interconnection protection.Then an intelligent interconnection protection scheme is proposed based on mult-i class support vector machine(SVM).Based on the traditional binary SVM classifier,the proposed scheme is used to build a probability-based mult-i class classifier,to realize fault and islanding detection.To improve the generalizing ability of the classifier,SVM-recursive feature elimination (SVM-RFE) algorithm is utilized to identify the critical features.Finally,detailed simulation results are given to demonstrate the effectiveness of the proposed protection scheme over the conventional protections in terms of reliability and security.
