scholarly journals Synchronous Generators Modeling and Control Using the Framework of Individual Channel Analysis and Design: Part 1

ENERGYO ◽  
2018 ◽  
Author(s):  
Carlos Ernesto Ugalde Loo ◽  
Luigi Vanfretti ◽  
Eduardo Liceaga-Castro ◽  
Enrique Acha
Keyword(s):  
Synchronous Generators ◽  
Modeling And Control ◽  
Analysis And Design ◽  
Channel Analysis ◽  
And Control

scholarly journals Synchronous Generators Modeling and Control Using the Framework of Individual Channel Analysis and Design: Part 1

2007 ◽  
Vol 8 (5) ◽  
Author(s):  
Carlos Ernesto Ugalde Loo ◽  
Luigi Vanfretti ◽  
Eduardo Liceaga-Castro ◽  
Enrique Acha
Keyword(s):  
Control System ◽  
System Analysis ◽  
Block Diagram ◽  
Synchronous Generator ◽  
Careful Analysis ◽  
Operating Conditions ◽  
Synchronous Generators ◽  
Modeling And Control ◽  
Analysis And Design ◽  
Channel Analysis

In this paper a comprehensive dynamical assessment of a high order synchronous generator plant is carried out using the Individual Channel Analysis and Design (ICAD) framework –a multivariable control engineering tool that allows robustness and system performance evaluations. The great benefits of ICAD are elucidated and contrasted to those provided by the long-time honored block diagram representations. Several models used for the small signal stability analysis of synchronous generators are evaluated under the framework of ICAD. The study, which builds on pioneering work, reveals the great advantages of carrying out control system analysis and design with higher order generator models. Moreover, careful analysis of the ICAD's Multivariable Structure Function (MSF) helps to explain, formally, why some operating conditions of the control system are more critical than others. Furthermore, correct interpretations of MSFs are amenable to robust and stable control system designs. Two kinds of studies are considered in the paper; one assesses operation under various power factor conditions and the other under a varying tie-line reactance. The control system design and stability and structural robustness assessment of the system are presented in the second part of this paper. Moreover, results obtained under the ICAD framework are compared with those arising from conventional controllers.

Modeling and Control of Excitation Systems for Synchronous Generators

2011 ◽  
Vol 148-149 ◽  
pp. 983-986
Author(s):  
Farouk Naeim ◽  
Sheng Liu ◽  
Lan Yong Zhang
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Electrical Power ◽  
Control Element ◽  
Steam Turbines ◽  
Synchronous Generators ◽  
Power Station ◽  
Modeling And Control ◽  
Generation Cost ◽  
And Control

The electrical power generation and distribution in power plant suffers from so many problems, such as instability of demand and generation. These lead to increase of generation cost. The system under consideration is consist of two steam turbines each of 30 MW with total of 60 MW (2*30). The excitation system of 30 MW generators has been chosen, due to the problems faced by operators in power station. These problems include aging of the control element, feeding back signal and loading increase/ decrease problems.

scholarly journals Addressing Abrupt PV Disturbances, and Mitigating Net Load Profile’s Ramp and Peak Demands, Using Distributed Storage Devices

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1024 ◽  
Author(s):  
Roshan Sharma ◽  
Masoud Karimi-Ghartemani
Keyword(s):  
Distributed Storage ◽  
Synchronous Generators ◽  
Load Profile ◽  
Modeling And Control ◽  
Storage Devices ◽  
High Penetration ◽  
On Line ◽  
Battery Energy ◽  
And Control ◽  
Net Load

At high penetration level of photovoltaic (PV) generators, their abrupt disturbances (caused by moving clouds) cause voltage and frequency perturbations and increase system losses. Meanwhile, the daily irradiation profile increases the slope in the net-load profile, for example, California duck curve, which imposes the challenge of quickly bringing on-line conventional generators in the early evening hours. Accordingly, this paper presents an approach to achieve two objectives: (1) address abrupt disturbances caused by PV generators, and (2) shape the net load profile. The approach is based on employing battery energy storage (BES) systems coupled with PV generators and equipped with proper controls. The proposed BES addresses these two issues by realizing flexible power ramp-up and ramp-down rates by the combined PV and BES. This paper presents the principles, modeling and control design aspects of the proposed system. A hybrid dc/ac study system is simulated and the effectiveness of the proposed BES in reducing the impacts of disturbances on both the dc and ac subsystems is verified. It is then shown that the proposed PV-BES modifies the daily load profile to mitigate the required challenge for quickly bringing on-line synchronous generators.

scholarly journals Individual Channel Analysis of the Thyristor-Controlled Series Compensator Performance

2010 ◽  
Vol 11 (2) ◽  
Author(s):  
Carlos Ernesto Ugalde Loo ◽  
Enrique Acha ◽  
Eduardo Liceaga-Castro ◽  
Luigi Vanfretti
Keyword(s):  
Closed Loop ◽  
Synchronous Machine ◽  
Minimum Phase ◽  
Synchronous Generators ◽  
System Operation ◽  
Analysis And Design ◽  
Effective Impedance ◽  
Phase Condition ◽  
Channel Analysis ◽  
Thyristor Controlled Series Compensator

The TCSC is the electronically-controlled counterpart of the conventional series bank of capacitors. A mature member of the FACTS technology, the TCSC has the ability to regulate power flows along the compensated line and to rapidly modulate its effective impedance. In this paper its performance is evaluated using Individual Channel Analysis and Design. Fundamental analysis is carried out to explain the generator dynamic behavior as affected by the TCSC. Moreover, a control system design for the system is presented, with particular emphasis in the closed-loop performance and stability and structural robustness assessment. It is formally shown that the incorporation of a TCSC operating in its capacitive range improves the dynamical performance of the synchronous machine by decreasing the electrical distance and therefore considerably reducing the awkward switchback characteristic exhibited by synchronous generators. It is also formally proven in the paper that the inductive operation should be avoided as it impairs system operation. In general, the TCSC inclusion brings on fragility into the global system, making it non-minimum phase and introducing adverse dynamics in the speed channel of the synchronous machine. Moreover, it is shown that the minimum-phase condition may also be present in cases featuring high capacitive compensation levels.

Sign in / Sign up

Export Citation Format

Share Document