SIMPLIFIED DECOUPLER FOR DESIGN OF IMC-BASED FRACTIONAL AGC CONTROLLER FOR TWO-REGION POWER SYSTEM

Abstract

Abstract The present invention relates to a simplified decoupler designed for integration with Internal Model Control (IMC)-based fractional Automatic Generation Control (AGC) systems, specifically for two-region intl!n:onnectet:l.power syste.ms. In modern power systems, the control of frequency in multiple regions is a complex task, largely due to the interdependence of power flows and frequency deviations between interconnected regions. Traditional AGC systems face challenges in maintaining independent control over each region's frequency while ensuring the stability of the overall system. This is further complicated by the interactions between regions, where a change in one region's frequency can affect the other. The proposed invention introduces a simplified decoupler that acts as an interface between the two-region power system and the IMC-based fractional AGC controllers. The IMC-based controllers independently manage the frequency deviations in each region, providing corrective signals to mitigate these deviations. The role of the decoupler is to ensure that the control actions for one region dq not interfere with or destabilize the other region, effectively decoupling the control dynamics of the two regions. This novel decoupler reduces the complexity of traditional decoupling ·me,chanisms while maintaining high performance in terms of frequency stabilization and power sharing. By simplifying the control architecture, the invention enhances tlie overall robustness and stability of the AGC system, minimizing the computational burden typically associated with fractional-order control strategies. Additionally, the invention provides · an efficient solution for maintaining coordinated control in interconnected power systems, improving ·both dynamic response and operational reliability.

Specification

Field of the Invention
The present invention relates to control strategies for power systems, specifically to
the design and implementation of a simplified decoupler for the internal model control
(IMC) based fractional automatic generation control (AGC) of two-region power
systems.A two area non-reheated interconnected thermal power system is considered
for decentralised controller design. The coupling among areas are the main hurdle
encountered in the design of controller. Hence, the idea of simplified decoupling
technique is introduced to decouple the two area power system into two equivalent
independent SISO systems. Integer and non-integer internal model control (IMC), are
independently designed for each area based on decoupled systems. The performance
of two area power system equipped with proposed controller is analysed through
MA TLAB. Simulation results show that· proposecf- controiier malntairts--rob-ust
performance and can minimize the load fluctuations. Finally, the method is extended
to three area power system.
Objective oflnvention
Automatic Generation Control (AGC) is a key process in maintaining the balance of
power and frequency stabi.lity in interconnected power systems. In multi-region power
systems, interactions between regions can create challenges in controlling frequency
deviations. Traditional AGC controllers may not fully address the decoupling of
frequency dynamics between regions. The application of fractional-order controllers
and IMC has shown promise in enhancing the performance of AGC. However, the
complexity of implementation remains a concern.
This invention introduces a simplified decoupler that interfaces with IMC-based
fractional-AGe controllers to ensure effective control and decoupling··bet)Veen· two
regions in a power system. The proposed decoupler significantly reduces the
computational complexity while maintaining robust system performance.
Art of Invention
The present invention provides a simplified decoupler integrated with an IMC-based
fractional AGC controller. This invention is designed to effectively manage the
interactions between two interconnected power system regions. The decoupler allows
for improved frequency regulation and power transfer control between the regions.
The system consists of two primary AGC controllers for each region, which are based
on internal model control (IMC) prlncipies. These controllers manage frequency
deviations within their respective regions. The simplified decoupler sits between the
controllers and the two-region power system, ensuring that the frequency control in
one region does not adversely affect the other. This allows for independent yet
coordinated control of each region, improving system stability afid"effidency.

The invention is based on the integration. of a simplified decoupler into the AGC
control system. The key components include:
Two Area Power System: The power system consists of two interconnected regions,
each subject to changes in frequency due to load fluctuations.
IMC-Based AGC Controllers: Each area has its own AGC controller designed using
IMC principles. These controllers take frequency deviations as input and provide
corrective actions to stabilize the system.
Simplified Decou pier: The decoupler is a novel element that effectively separates the
control efforts of the two r.egions, preventing unwanted interactions. It ensures that the
actions taken by the AGC controller in one region do not disturb the power balance or
frequency of the other region.





We Claim
a. A simplified decoupler for a two-region power system, designed to interface with
internal model control (IMC)-based fractional automatic generation control (AGC)
controllers, ensuring improved frequency regulation and decoupling between the
two regions. ·
b. The decoupler as claimed in claim I, wherein the IMC-based AGC controllers
provide corrective actions based on frequency deviations in their respective
. regions.
c. The decoupler as claimed in claim I, wherein the decoupler ensures that the
control actions taken by the AGC controller in one region do not disturb the
frequency or power stability of the other region.
d. A two-region power system control method, utilizing a simplified decoupler and
IMC-based fractional AGC controllers, for maintaining independent yet
coordinated control of frequency deviations in the interconnected regions.
e. The method as clain;~ed in claim 4, wherein the decoupler processes control
signals from the IMC-based AGC controllers to optimize frequency stability and
power flow between the regions.

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