1.The problem of reactive power is mainly caused by charging reactive power of transmission line and transformer;

2. Large fluctuation of voltage       

3. The Voltage rise when voltage sag recovery 

4. Small amount of harmonic;                

5. Voltage imbalance exists in some sites

1. The problem of reactive power is mainly caused by charging reactive power of transmission line and transformer, especially at night;

2. Large fluctuation of voltage

3. The Voltage rise when voltage sag recovery

4. Small amount of harmonic;

5. Voltage imbalance exists in some sites

1. Low power factor, from 0.7 to 0.85 generally;

2. Large harmonic current, mainly from 2nd to 7th harmonic

3. Severe three phase imbalance

4. Voltage fluctuation and flickering

1. Low power factor, from 0.7 to 0.85 generally;

2. Large harmonic current, mainly from 2nd to 7th harmonic

3. Severe three phase imbalance

4. Voltage fluctuation and flickering

1. Weak system voltage

2. High power transmission loss

3. Low terminal voltage