Capacitor Unbalance Voltage Protection: Working Principle, Function, and Setting Calculation
Capacitor Unbalance Voltage Protection is used to monitor the voltage distribution among individual units within a capacitor bank, particularly in series-connected banks. Its operating principle is based on Kirchhoff's Voltage Law and capacitor voltage division. Under normal operating conditions, the voltage across each unit in the bank is relatively balanced, resulting in a minimal unbalance voltage. When a capacitor unit fails (e.g., internal short circuit, open circuit, or performance degradation), the voltage distribution becomes unequal, generating a significant unbalance voltage.
2025/11/12
Capacitor Unbalanced Current Protection: Working Principle, Function, and Setting Calculation
Capacitor unbalanced current protection is a critical technology in power systems used to detect and protect against internal faults within capacitor banks. It operates by monitoring the changes in unbalanced current at the neutral point or bridge circuit of the capacitor bank, promptly isolating faults to prevent their escalation.
2025/11/05
Renovation Scheme for Unattended Automatic System of Hydropower Station
The core of the transformation of the unattended automation system for hydropower stations is to upgrade the traditional manually attended power station into a modern intelligent power station with "unattended operation and minimal personnel on duty" through computerized monitoring, intelligent sensing, reliable communication and remote centralized control. It realizes remote monitoring, automatic control, fault self-diagnosis and safety early warning, greatly reducing labor costs and improving operational efficiency and safety. Among them, the secondary electrical system, as the "nervous system, brain and safety line of defense" of the power station, is the core support for the unattended transformation. Without a reliable secondary system, true unattended operation cannot be achieved. Therefore, this integration will focus on improving the detailed content of secondary electrical equipment while retaining the full process details of the transformation.
2026/04/21
