PV System Automatic Reactive Compensation Controller
✅Improves Power Quality and Ensures Grid Compliance
✅Reduces Grid Losses and Enhances Economic Benefits
✅Supports Grid Voltage and Enhances System Stability
✅Intelligent Adaptive Control for Efficient Resource Utilization
✅Extends Equipment Lifespan and Ensures System Safety
- Product Introduction
Products Description
OurPV System Automatic Reactive Compensation Controller is designedspecifically for distributed grid-connected PV scenarios. It canresolves low power factor issues effectively which caused by capacitive reactive power during inverter standby and reverse active power flow. Utilizing a high-performance microprocessor and Fourier series decomposition algorithms, the device accurately captures fundamental wave data amidst bidirectional power flows and complex harmonic environments.It supports four-quadrant intelligent control and coordinated reactor output; it automatically absorbs capacitive reactive power during low PV output or nighttime standby and precisely engages capacitive compensation during peak load periods, enabling dynamic bidirectional regulation. Through a "high-sampling/low-compensation" strategy and millisecond-level response times, the controller maintains a stable power factor above 0.95 around the clock, effectively eliminating power factor penalties and reducing line losses, thereby ensuring reliable, unattended power quality management for PV power plants.
Products Feature
- PV-Specific Algorithm: Specifically designed for photovoltaic grid connection, it solves the problem of power factor display errors caused by inverter harmonics.
- Rapid Response: With a fastest response time of 21ms, it ensures real-time compensation for fluctuating loads.
- Comprehensive Monitoring: 3-phase 2-wire input, monitors voltage, current, frequency & distortion rate simultaneously.
- Modular Expandability: Supports master-slave configuration (up to 96 circuits), suitable for large-scale solar farms and industrial rooftops.
- Smart Communication: Standard RS485 interface with MODBUS-RTU protocol for seamless integration with SCADA systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Power Supply Voltage Range | Rated AC 400V (Ua-Uc) -15% to +20% |
| Signal Voltage Range | Rated AC 400V ±20% |
| Signal Current Range | 0.02 - 5.5A |
| Signal Input Mode | 3-phase 2-wire |
| Operating Frequency | 45 - 65Hz |
| Minimum Signal Current | 20mA |
| Node Output Capacity | AC 220V / 5A (including fan control node) |
| Active Output Capacity | -12V / 8mA (with V terminal as zero voltage reference) |
| Fastest Response Time | 21ms (only for active output type) |
| Total Power Consumption | 8VA |
| Minimum Mounting Cutout Size | 112.5mm × 112.5mm (Type S) / 138mm × 138mm |
| Mounting Depth | 55mm (Type S) / 55mm |
| Panel Dimensions | 120mm × 120mm (Type S) / 146mm × 146mm |
| Protection Rating | IP30 |
| Installation Method | Flush-mounted with snap-on accessories & screw fixation |
| Max Output Circuits (Single Unit) | 24 |
| Max Output Circuits (Main + Auxiliary) | 96 |
| Current Signal Input Impedance | <0.01 ohms |
Note for Active Output Terminals:
For active output terminals, as long as the total output current does not exceed the number of circuits multiplied by 8mA, a single circuit is allowed to output up to 20mA.
For example, a 24-circuit controller allows a total output current of 24 × 8 = 192mA.
If only 10 circuits are used, each circuit can output up to 192/10 = 19.2mA.
Note: The High Sampling/Low Compensation control terminals are specifically designed for application scenarios featuring: Low load factor conditions, Significant no-load reactive power losses in transformers, Parallel operation of multiple transformers. Pls contact us for more technical details
Model Meaning
❶ JNGF Series PV Reactive Power Compensation Controllers
❷ (G) Common Compensation Type
❸ (12/18/24) Control Circuits
❹ (J) Relay Output Type (Blank = Active Output Type)
❺ (S) Panel Cutout Size: 113mm×113mm (Blank = 138.5mm×138.5mm)
❻ (G) High Sampling/Low Compensation Special Type (Requires matching current transformer; high-voltage non-invasive current signal collector sold separately)
Functions of each switching Mode
| Switching mode | Features | Balanced usage | Compensation accuracy | Optimal Application Environment |
| P-1 cycle switching | Replaces one engaged circuit with one disengaged circuit every hour under stable conditions to achieve balanced usage. Configurable (consult manufacturer). | good | Medium | Static compensation |
| P-2 Encoded switching | Engages/disengages capacitor banks based on capacity combinations | poor | High | Fast compensation |
| P-3 optimal switching | Selects most suitable capacitor bank to engage from disengaged banks, or to disengage from engaged banks | Very poor | Medium | Static compensation |
| P-4 sequential switching | First-engaged capacitors are last-disengaged | fair | Low | Filter compensation |
Applications
1. large-scale solar farms
2. Commercial and industrial rooftop solar systems
3. Weak grid and rural electrification
4. Hybrid solar storage systems
5. Grid-tied PV systems
6. Agricultural solar pumping systems
7. Electric vehicle charging stations with solar
FAQ
Q1: What is the difference between the "Active Output" and "Relay Output" types?
A: The Relay Output type directly drives contactors (suitable for smaller systems). The Active Output type provides a DC signal (12V/8mA) typically used to trigger intermediate relays or solid-state switches in larger, modular compensation banks.
Q2: Can this controller work in "Power Generation Mode" (when PV feeds power back to the grid)?
A: Yes. The controller automatically detects the operating quadrant. It can intelligently manage capacitor switching whether the system is in Power Supply Mode (consuming power) or Power Generation Mode (feeding power), ensuring compliance in all conditions.
Q3: What is the "High Sampling/Low Compensation" mode?
A: This special mode is designed for scenarios with low load factors or multiple parallel transformers. It uses an external high-voltage current signal adapter to accurately measure the total reactive power and control the low-voltage compensation capacitors accordingly.
Hot Tags: pv system automatic reactive compensation controller, China pv system automatic reactive compensation controller manufacturers, suppliers, factory, Hybrid Capacitor Switching Module
