Renewable Energy · Power Quality Solution
For renewable energy integration scenarios, INPOWER SVG provides millisecond-level dynamic response, bidirectional inductive and capacitive reactive power compensation, and simultaneous mitigation of 2nd–25th order harmonics to meet grid interconnection power quality requirements.
Typical Case:
Hithium Energy Storage Technology
Project Background: Hithium Energy Storage Technology is a key industrial project in Fujian Province and a national high-tech enterprise, specializing in the R&D and manufacturing of lithium iron phosphate energy storage batteries and systems.
Challenges: The production process involves extensive use of variable frequency drive (VFD) equipment, resulting in severe harmonic distortion. The THDi reached 20%-30%, causing issues such as abnormal transformer noise, temperature rise, protection relay malfunctions, and inaccurate metering.
INPOWER implemented an SVG + APF hybrid solution (APF capacity: 12,350A; SVG capacity: 12,100kvar).
After mitigation, harmonic distortion indicators fully complied with relevant standards, significantly improving equipment operating stability:
Table 1 Comparison Before and After APF & SVG Activation
|
Parameter |
Transformer No.1 |
Transformer No.2 |
|||
|
Before |
After |
Before |
After |
||
|
THDi |
26.27% |
2.14% |
23.78% |
3.01% |
|
|
THDu |
3.26% |
1.55% |
6.54% |
2.52% |
|
|
RMS Harmonic Current (A) |
3rd |
219.9 |
9.0 |
71.5 |
7.2 |
|
5rd |
163.1 |
4.8 |
480.2 |
23.8 |
|
|
7rd |
58.6 |
13.9 |
119.2 |
20.1 |
|
|
11rd |
27.1 |
9.5 |
102.7 |
17.4 |
|
|
13rd |
6.5 |
5.7 |
50.2 |
20.4 |
|
Figure: Voltage and Current Waveforms of the 2500kVA Transformer Before and After Mitigation
Before
After
Previous:
None
