Power Control Circuit for Smart Load Frequency Stabilization
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Solution Overview
Problem
The integration of dynamically changing renewable energy sources into power grids poses challenges for predicting real-time power generation, leading to uncertainties and potential voltage stability issues in smart grid systems, as traditional power control methods are inadequate for managing distributed and variable power sources.
Innovation Solution
The implementation of a power control circuit that utilizes reactive power controllers to stabilize electrical parameters by absorbing and delivering reactive and active power, forming 'smart loads' that can regulate voltage and frequency, thereby maintaining power grid stability. This is achieved by controlling the input voltage of series reactive power controllers connected in series with electric loads, allowing the load power to follow the dynamic power generation profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If distributed renewable energy sources are integrated into the power grid, then the diversity and adaptability of power generation increase, but the voltage stability and predictability of the system deteriorate
Solution Approach 1:
The patent implements a feedback control mechanism where the power control circuit continuously monitors the instantaneous voltage of the power supply and adjusts the duty cycle of the switching element accordingly. This closed-loop feedback system enables the circuit to respond dynamically to voltage fluctuations caused by renewable energy sources, maintaining voltage stability while accommodating diverse power generation inputs
Solution Approach 2:
The power control circuit automatically adjusts its operation based on real-time voltage conditions without requiring external intervention. The control circuitry autonomously modifies the duty cycle to compensate for voltage variations, enabling the system to self-regulate and maintain stability in response to changing renewable energy input conditions
2Device complexity
If traditional power control methods are used, then the system simplicity is maintained, but the ability to manage distributed and variable power sources deteriorates
Solution Approach 1:
The patent employs dynamic control by varying the duty cycle of the switching element in real-time based on instantaneous voltage conditions. This dynamic adjustment mechanism allows the relatively simple power control circuit to adapt to variable power sources and distributed energy inputs, providing enhanced management capability without significantly increasing system complexity
3Reliability
If reactive power controllers are distributed across loads, then the voltage stability improves, but the device complexity increases
Solution Approach 1:
The patent distributes the power control functionality across multiple loads in the system, with each load having its own power control circuit that independently monitors and regulates voltage. This segmentation of the control system allows voltage stability to be maintained at multiple points in the network, with each segment operating autonomously based on local voltage conditions
Data Source
Figure 1a~1b
Figure 2~3
Figure 4~5b
AI summary
A power control circuit (1) connectable to a load adapted to receive a power supply (3) and a method of stabilizing the frequency of the power supply (3) connectable to the load. The power control circuit (1) is adapted to absorb power from the power supply (3) and adapted to deliver power to the power supply (3) to stabilize the frequency of the power supply (3). The method includes the following steps: absorbing power from the power supply (3) or delivering the power to the power supply (3).