By sion932 
In the vast and complex operation network of the power system, there are always some “behind the scenes heroes” silently guarding the stability and safety of the current. Today, let’s talk about one of the important roles – series resonant devices. This name may sound a bit “high-end”, but its role is very practical, and it can be said to be a “balancing artist” in the power system.
What is a series resonant device?
Simply put, a series resonance device is a device used to detect and suppress the series resonance phenomenon formed by inductive and capacitive elements in a power system at a specific frequency. You may have heard of ‘resonance’, which can be a catalyst for energy amplification in many cases. However, in power systems, uncontrolled resonance can lead to sharp increases in voltage and current, causing serious damage to equipment and even causing widespread power outages. The series resonant device exists to prevent this “out of control” situation.
The ‘things’ that affect series resonance
What causes series resonance to occur? There can be many influencing factors:
System frequency variation: The operating frequency of the power system is not constant, and even small fluctuations may touch the resonance point.
Line parameter changes: As the line ages, temperature changes, or load increases or decreases, the inductance and capacitance parameters of the line will also change accordingly.
Load characteristics: Different types of loads (such as inductive and capacitive) connected to the power grid will change the overall circuit parameters.
Adjustment of power grid structure: The addition or subtraction of power lines, as well as changes in operating modes, may recombine circuit parameters and create new resonance conditions.
The ‘secret weapon’ for controlling series resonance
What tools are available to better address the challenges posed by series resonance?
Reactor: By increasing the inductance of the circuit, the resonant frequency is changed to avoid coincidence with the natural frequency of the system.
Capacitor bank: Adjusting the capacitance value is also to change the resonance point.
Damper: Introducing resistive elements to dissipate the energy generated by resonance and reduce the peak values of voltage and current.
Specialized monitoring and control systems: Often, we need advanced monitoring equipment to capture potential resonance signals in real time and promptly activate corresponding suppression measures.
In this field, HVHIPOT provides a solid guarantee for the safe operation of the power system with its profound technological accumulation and innovative products. Their in-depth research and solutions to series resonance have contributed significantly to the progress of the industry.
The Unresolved Connection between Series Resonance and Power Systems
The phenomenon of series resonance is not uncommon in power systems, especially in long-distance transmission lines, cable lines, and distribution networks containing a large number of capacitive loads. Its appearance is often closely related to high-order harmonics, transient processes, and so on. Understanding the principle of series resonance is crucial for optimizing the scheduling and operation of the power grid, improving equipment lifespan, and ensuring power supply reliability.
How to do it ‘better’?
To better manage series resonance, we need to:
Accurate parameter measurement: Accurately mastering the inductance, capacitance, and other parameters of the circuit is the first step.
Advanced simulation analysis: using professional software tools to simulate resonance risks under different operating conditions.
Intelligent suppression strategy: Combining real-time data to dynamically adjust the working status of suppression devices.
Periodic equipment inspection and maintenance: Ensure that all relevant power equipment is in good operating condition, and HVHIPOT provides professional services and support in this regard.
Continuous technological innovation: keep up with industry development and continuously optimize the monitoring and suppression technology of series resonance.
With the professional support of our , we are able to more effectively address the challenges brought by series resonance and ensure the smooth operation of the power system.