An adaptive supervised wide-area backup protection scheme for transmission lines protection  

作　　者：B.Mallikarjuna P.V.Vardhan Varma S.D.Samir M.Jaya Bharata Reddy D.K.Mohanta 

机构地区：[1]Department of Electrical and Electronics Engineering,National Institute of Technology,Tiruchirappalli,Tamilnadu,India. [2]Department of Electrical and Electronics Engineering,Birla Institute of Technology,Mesra,Ranchi,India.

出　　处：《Protection and Control of Modern Power Systems》2017年第1期229-244,共16页现代电力系统保护与控制（英文）

摘　　要：Maloperation of conventional relays is becoming prevalent due to ever increase in complexity of conventional power grids.They are dominant during power system contingencies like power swing,load encroachment,voltage instability,unbalanced loading,etc.In these situations,adaptive supervised wide-area backup protection(ASWABP)plays a major role in enhancing the power system reliability.A balance between security and dependability of protection is essential to maintain the reliability.This paper proposes multi-phasor measurement units(MPMU)based ASWABP scheme that can function effectively during faults besides power system contingencies.MPMU is an extended version of Phasor Measurement Unit(PMU).It is an intelligent electronic device which estimates the synchronized predominant harmonic phasors(100Hz and 150Hz)along with the fundamental phasors(50Hz)of three phase voltages and currents with high precision.The proposed ASWABP scheme can detect the fault,identify the parent bus,determine the faulty branch and classify the faults using MPMU measurements at System Protection Center(SPC).Based on these MPMU measurements(received at phasor data concentrator(PDC)at SPC)the appropriate relays will be supervised to enhance the overall reliability of the power grid.Numerous case studies are conducted on WSCC-9 bus and IEEE-14 bus systems to illustrate the security and dependability attributes of proposed ASWABP scheme in MATLAB/Simulink environment.Also,comparative studies are performed with the existing conventional distance protection(Mho relays)for corroborating the superiority of the proposed scheme regarding security and dependability.Comparative studies have shown that the proposed scheme can be used as adaptive supervised wide-area backup protection of conventional distance protection.

关 键 词：Adaptive supervised wide-area backup protection(ASWABP) Multi-phasor measurement unit(MPMU) SECURITY DEPENDABILITY 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]