Distribution network automation Basics

Four links: power generation, power transmission, power distribution, and power consumption

Substation phase: Transmission/Distribution

Distribution System = primary device + secondary device

One-time equipment: line, transformer, switch and other strong electrical equipment

Secondary equipment: measurement, protection, and other weak Devices

Distribution System = Distribution Network + Secondary System

Power supply quality includes: power supply reliability, power quality, and service quality

The first problem that can only be solved by the power grid is the power supply quality.

Neutral Point Grounding: Direct grounding, small current grounding, ungrounded, Resonant Grounding

Distribution Center: American and European

Other equipment: reactor, Circuit Breaker, breaker, and demarcation Switch

Fault Isolation

Small Current Grounding Line Selection: Using Fault steady state, additional fault current, and fault transient Information

Line Selection classification:

Based on signal sources: active and passive

Signal Components: steady state and transient state