Capacitor Condition Monitoring for the Low-Capacitance StatCom: An Online Approach
- Resource Type
- Periodical
- Authors
- Rodriguez Ramos, E.; Leyva, R.; Farivar, G.G.; Townsend, C.D.; Pou, J.
- Source
- IEEE Transactions on Power Electronics IEEE Trans. Power Electron. Power Electronics, IEEE Transactions on. 37(4):3697-3701 Apr, 2022
- Subject
- Power, Energy and Industry Applications
Aerospace
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
General Topics for Engineers
Nuclear Engineering
Signal Processing and Analysis
Transportation
Capacitors
Capacitance
Automatic voltage control
Oscillators
Monitoring
Switches
Condition monitoring
Capacitance reduction
cascaded H-bridge (CHB)
dc capacitor
health estimation
online monitoring
reliability
static compensator (STATCOM)
- Language
- ISSN
- 0885-8993
1941-0107
The cascaded H-bridge low-capacitance static compensator (LC-StatCom) uses relatively small capacitors subjected to large voltage oscillations. When a capacitor degrades, its capacitance differs from the nominal value, and this deteriorates the StatCom operation and safety. This is an important reason to monitor the capacitors condition in StatComs. This letter presents a detailed analysis of the capacitor voltage oscillations and their dependence on the capacitance values. The analysis allows monitoring the condition of the capacitors using a closed-loop approach that feedbacks the error in voltage oscillations. The proposed method is a hardware-free online solution for capacitor condition monitoring (CCM) in LC-StatComs. The letter presents simulation and experimental results that corroborate the effectiveness of the proposed CCM loop.