Do You Really Understand Reactive Power?

What is Reactive Power?

In power systems, electric power is typically divided into three types:

• Active Power (P): The real power used to perform work (e.g., running motors, lighting).

• Reactive Power (Q): Power that does not perform work but is essential for generating and sustaining electric and magnetic fields.

• Apparent Power (S): The vector sum of active and reactive power.

S² = P² + Q²

Think of reactive power as the energy used to "set up the stage"—it doesn’t perform the task directly but is vital for the show to run.

Types of Reactive Power

• Inductive Reactive Power: Generated by inductive loads like motors and transformers. It causes current to lag voltage.

• Capacitive Reactive Power: Generated by capacitive equipment such as capacitors or long transmission lines. It causes current to lead voltage.

Modern power systems typically contain more inductive loads, which may result in excessive reactive demand, lowering voltage and power factor.

Why Is Reactive Power Compensation Important?

To maintain system stability and energy efficiency, reactive power must be managed with compensation devices such as Static Var Generators (SVGs), which help to:

• Improve power factor

• Reduce line losses and transformer stress

• Prevent voltage dips and collapse

• Comply with grid interconnection standards

FGI’s Role in Reactive Power Management

FGI develops advanced power electronics including SVG systems that offer real-time, precise control of inductive and capacitive reactive power across LV and HV networks. These solutions are widely adopted in:

• Key Features: Millisecond response, intelligent control, wide temperature range, modular design
• Industries: Renewable energy, heavy industry, EV infrastructure, smart grid utilities

Reactive power is invisible—but its impact is everywhere.

With FGI, let's empower the grid with cleaner, more stable, and more efficient power solutions.

Reach out to us for a free evaluation and tailored solution:

E-mail: overseas@fengguang.com

Add: Jincheng Road, Economic Development Zone, Wenshang County, Shandong Province, China.