Fast Response Active KVAR Compensator Using Variable Transimpedance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Legacy automatic variable capacitor KVAR compensation systems in electrical power transmission and distribution networks are slow and discontinuous in regulating reactive power due to the need for discrete capacitor switching, which is inefficient in managing rapidly changing reactive power values.
Innovation Solution
A fast response active KVAR compensator using a variable transimpedance topology with an AC variable voltage system, where the gain of an AC amplifier is controlled electronically to smoothly and continuously adjust apparent capacitance or inductance, allowing for rapid and precise compensation of reactive power without discrete steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrete capacitor banks are switched in and out to compensate reactive power, then reactive power compensation can be achieved, but the response is slow and discontinuous
Solution Approach 1:
The patent replaces the mechanical switching system (electromechanical relays and contactors that switch discrete capacitor banks) with an electronic system using semiconductor switching devices (SCRs and TRIACs) to control a continuous variable capacitor. This substitution eliminates the inherent slowness and discontinuity of mechanical switching, enabling fast and continuous reactive power compensation that tracks rapidly changing KVAR conditions in real-time.
Solution Approach 2:
The patent implements a dynamic continuous variable capacitor that can smoothly adjust its capacitance value without discrete steps. This dynamic element, controlled by electronic switching devices, allows the compensation system to continuously adapt to changing reactive power demands, providing a dynamic response rather than the static, step-based adjustment of traditional capacitor banks.
2Reliability
If discrete capacitor banks are used for KVAR compensation, then compensation can be provided, but the adjustment is discontinuous with visible steps
Solution Approach 1:
The patent replaces the mechanical switching system (electromechanical relays and contactors that switch discrete capacitor banks) with an electronic system using semiconductor switching devices (SCRs and TRIACs) to control a continuous variable capacitor. This substitution eliminates the inherent slowness and discontinuity of mechanical switching, enabling fast and continuous reactive power compensation that tracks rapidly changing KVAR conditions in real-time.
Solution Approach 2:
The patent introduces semiconductor switching devices (SCRs and TRIACs) as intermediary components between the control system and the capacitor banks. These electronic intermediaries enable smooth, stepless adjustment of capacitance by controlling the phase angle of AC voltage applied to the capacitors, thereby eliminating the discontinuous steps associated with direct mechanical switching of discrete capacitor units.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid and continuous adjustment of reactive power compensation, improving power quality by minimizing phase shifts between voltage and current, thereby enhancing the efficiency of electrical power transmission and distribution.
Implementation Method 1
an AC variable voltage system, where the gain of an AC amplifier is controlled electronically to smoothly and continuously adjust apparent capacitance or inductance
Data Source
AI summary
Legacy automatic variable capacitor KVAR compensation systems typically use either electromechanical devices such as relays or contactors of various forms and types to switch the selected capacitors in and out of the electrical system under some form of electronic control. These systems are slow and discontinuous in their ability to closely regulate the exact value of compensatory capacitance needed to compensate the variable and rapidly changing reactive power KVAR in the electrical power transmission and distribution networks. The present invention provides a fast response active KVAR compensator based on a variable transimpedance topology.