基于ESR的电解电容器在线故障诊断系统设计
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摘要
ESR(等效串联电阻)是评估电解电容器健康状态的重要指标之一,而由于电解电容器结构特殊性,ESR值很难直接测量。为了实时监测电解电容器的健康状态,建立了电解电容器等效模型,分析并测试了ESR频率特性与温度特性,提出一种通过在线计算ESR评估电解电容器健康状态以实现在线故障诊断的方法。该方法将ESR实时计算值和初始值作比较,在同等工作条件下当前者相对于后者增加至一定数值时,可认为该电解电容器已失效,观测者可根据此机理及时进行更换处理。最后通过dSPACE半实物实验平台对新方法的有效性进行了实验验证。
ESR(Equivalent Series Resistance) is one of the important indicators for evaluating health status of electrolytic capacitors. Due to the structural specificity of the electrolytic capacitors, ESR is difficult to measure directly. In order to monitor the health status of the electrolytic capacitor in real time, an equivalent model for the electrolytic capacitor is established. The ESR frequency characteristics and temperature characteristics are analyzed and tested. The method of online fault diagnosis by evaluating the health status of the electrolytic capacitor with online calculation of ESR is proposed. Comparing the calculated value of ESR real-time with the initial value, when the former increases to a certain threshold value with respect to the latter under the same working condition, the electrolytic capacitor can be considered as failed, and the observer can perform replacement processing according to this mechanism in time. Finally, the effectiveness of the method was verified by using the dSPACE semi-physical experimental platform.
ESR(Equivalent Series Resistance) is one of the important indicators for evaluating health status of electrolytic capacitors. Due to the structural specificity of the electrolytic capacitors, ESR is difficult to measure directly. In order to monitor the health status of the electrolytic capacitor in real time, an equivalent model for the electrolytic capacitor is established. The ESR frequency characteristics and temperature characteristics are analyzed and tested. The method of online fault diagnosis by evaluating the health status of the electrolytic capacitor with online calculation of ESR is proposed. Comparing the calculated value of ESR real-time with the initial value, when the former increases to a certain threshold value with respect to the latter under the same working condition, the electrolytic capacitor can be considered as failed, and the observer can perform replacement processing according to this mechanism in time. Finally, the effectiveness of the method was verified by using the dSPACE semi-physical experimental platform.
引文
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[21] ZHOU Y,YE X,ZHAI G.Degradation Model and Maintenance Strategy of the Electrolytic Capacitors for Electronics Applications[C]//Conference on Prognostics and System Health Management,2011:1-6
[22] GASPERI M L.Life Prediction Model for Aluminum Electrolytic Capacitors[C]//IEEE Industry Applications Conference Thirty-First IAS Annual Meeting,1996:1347-1351
[23] VOGELSBERGER M A,WIESINGER T,ERTL H.Life-Cycle Monitoring and Voltage-Managing Unit for DC-Link Electrolytic Capacitors in PWM Converters[J].IEEE Trans on Power Electronics,2011,26(2):493-503
[2] PANG H M,BRYAN P M H.A Life Prediction Scheme for Electrolytic Capacitors in Power Converters without Current Sensor[C]//Applied Power Electronics Conference and Exposition,2010:973-979
[3] KAI Y,TANG W,XIAOPENG B I,et al.An Online Monitoring Scheme of DC-Link Capacitor′s ESR and C for a Boost PFC Converter[J].IEEE Trans on Power Electronics,2016,31(8):5944-5951
[4] PU X S,NGUYEN T H,LEE D C,et al.Fault Diagnosis of DC-Link Capacitors in Three-Phase AC/DC PWM Converters by Online Estimation of Equivalent Series Resistance[J].IEEE Trans on Industrial Electronics,2013,60(9):4118-4127
[5] AMARAL A M R,CARDOSO A J M.Using Newton-Raphson Method to Estimate the Condition of Aluminum Electrolytic Capacitors[C]//IEEE International Symposium on Industrial Electronics,2007:827-832
[6] TSANG K M,CHAN W L.Simple Method for Measuring the Equivalent Series Inductance and Resistance of Electrolytic Capacitors[J].IET Power Electronics,2010,3(4):465-0
[7] AMARAL A M R,CARDOSO A J M.A Simple Offline Technique for Evaluating the Condition of Aluminum Electrolytic Capacitors[J].IEEE Trans on Industrial Electronics,2009,56(8):3230-3237
[8] AMARAL A M R,CARDOSO A J M.An Automatic Technique to Obtain the Equivalent Circuit of Aluminum Electrolytic Capacitors[C]//Conference of the IEEE Industrial Electronics Society,2008
[9] ABDENNADHER K,VENET P,ROJAT G,et al.A Real-Time Predictive-Maintenance System of Aluminum Electrolytic Capacitors Used in Uninterrupted Power Supplies[J].IEEE Trans on Industry Applications,2010,46(4):1644-1652
[10] GASPERI M L.Life Prediction Modeling of Bus Capacitors in AC Variable-Frequency Drives[J].IEEE Trans on Industry Applications,2005,41(6):1430-1435
[11] SEPEHR A,SARADARZADEH M,FARHANGI S.A Noninvasive On-line Failure Prediction Technique for Aluminum Electrolytic Capacitors in Photovoltaic Grid-Connected Inverters[C]//Conference on Power Electronics and Drive Systems Technologies,2016:356-361
[12] BUIATTI G M,MARTIN-RAMOS J A,GARCIA C H R,et al.An Online and Noninvasive Technique for the Condition Monitoring of Capacitors in Boost Converters[J].IEEE Trans on Instrumentation & Measurement,2010,59(8):2134-2143
[13] YAO K,TANG W,HU W,et al.A Current-Sensorless Online ESR and C Identification Method for Output Capacitor of Buck Converter[J].IEEE Trans on Power Electronics,2015,30(12):6993-7005
[14] MALEK H,DADRAS S,CHEN Y.Fractional Order Equivalent Series Resistance Modelling of Electrolytic Capacitor and Fractional Order Failure Prediction with Application to Predictive Maintenance[J].IET Power Electronics,2016,9(8):1608-1613
[15] GIVI H,FARJAH E,GHANBARI T.Switch Fault Diagnosis and Capacitor Lifetime Monitoring Technique for dc-dc Converters Using a Single Sensor[J].IET Science Measurement & Technology,2016,10(5):513-527
[16] ASTIGARRAGA D,ARIZTI F,IBANEZ F M,et al.Online Indirect Measurement of ESR and Capacity for PHM of Capacitors[C]//Control & Modeling for Power Electronics,2014
[17] NGUYEN T H,LEE D C.Deterioration Monitoring of DC-Link Capacitors in AC Machine Drives by Current Injection[J].IEEE Trans on Power Electronics,2015,30(3):1126-1130
[18] 陈永真.电容器手册[M].北京:科学出版社,2008CHEN Yongzhen.Capacitor[M].Beijing,Science Press,2008 (in Chinese)
[19] 马皓.铝电解电容器退化分析与故障预诊断[J].电力系统自动化,2005,29(15):68-72.MA Hao.Fault Diagnosis and Failure Prediction of Aluminum Electrolytic Capacitors[J].Automation of Electric Power Systems,2005,29(15):68-72 (in Chinese)
[20] KHAN S A,KHERA N,ISLAM T,et al.An Online Method for Condition based Maintenance of Aluminum Electrolytic Capacitors[C]//Engineering and Computational Sciences,2014:1-5
[21] ZHOU Y,YE X,ZHAI G.Degradation Model and Maintenance Strategy of the Electrolytic Capacitors for Electronics Applications[C]//Conference on Prognostics and System Health Management,2011:1-6
[22] GASPERI M L.Life Prediction Model for Aluminum Electrolytic Capacitors[C]//IEEE Industry Applications Conference Thirty-First IAS Annual Meeting,1996:1347-1351
[23] VOGELSBERGER M A,WIESINGER T,ERTL H.Life-Cycle Monitoring and Voltage-Managing Unit for DC-Link Electrolytic Capacitors in PWM Converters[J].IEEE Trans on Power Electronics,2011,26(2):493-503