Design of nonlinear robust excitation control for multimachine power systems

Sun, Changshan; Zhao, Zhixin; Sun, Yuanyuan; Lu, Qiang

doi:10.1049/ip-gtd:19960349

Cited by 45 publications

(29 citation statements)

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“…Non-linear control has attracted particular attention during the past few decades as virtually all physical systems are non-linear [5] in nature. Non-linear control [12] analysis and design provides a sharper understanding of real world.…”

Section: Non-linear Systemsmentioning

confidence: 99%

“…A general global control structure is based on the qualitative analysis of the dynamical systems. Local controllers are designed based on local models and local performance requirements and coordination rules are employed to combine [4], [5] the local elements control. The problem of designing controller to prevent an electric power system losing synchronism after a large sudden fault is of great importance in power system design [6].…”

Section: Introductionmentioning

confidence: 99%

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Analysis and design of different controllers for non-linear power systems

Chaudhary

Singh

2013

IJET

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The objective of this paper is to design controller for non-linear power system using Direct Feedback Linearization technique to improve the transient stability and to achieve better voltage regulation. In case of fault in the power system, power angle and the terminal voltage are the parameters which are to be monitored. The simulation has been carried out taking different values of initial power angles and results were obtained for power angle and terminal voltage. To overcome the demerits of DFL-LQ optimal controller and DFL voltage regulator, co-ordinated controller is proposed. Simulation results show that transient stability of a power system under a large sudden fault has been improved by using co-ordinated controller.

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Section: Non-linear Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and design of different controllers for non-linear power systems

Chaudhary

Singh

2013

IJET

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“…A nonlinear control design method using differential geometry theory was applied in excitation control design of synchronous generators for multi-machine systems [47]. In [49] a nonlinear robust control based on the combination of the ∞ H control approach and the exact linearization approach using differential geometry theory was presented for excitation control of synchronous generators. A nonlinear coordinated control of excitation and governor systems for a hydraulic power plant using differential geometry theory was proposed in [50].…”

Section: Nonlinear Controlmentioning

confidence: 99%

Power Electronic Control for Wind Generation Systems

Zhu

Rehtanz

Pal

2012

Flexible AC Transmission Systems: Modelling and Control

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Wind energy has mushroomed into a mature and booming global green business while generation costs have fallen dramatically. Modern wind turbine technologies have been improved significantly in their power rating, efficiency and reliability. Global wind energy capacity is up to 196.6 GW at the end of 2010. This Chapter covers • mathematical models for wind turbines such as wind turbine (WT) with doubly fed induction generator (DFIG) and WT with direct-drive permanent magnet generator (DDPMG);• small signal stability analysis and nonlinear control using power electronic back-to-back converters, which are very similar to those of UPFC and VSC HVDC;• dynamic equivalent modeling of wind farms;• and wind farm interconnection with power grid via VSC HVDC link. IntroductionGlobally the energy shortage and climate change are the two most biggest challenges. To tackle these, great efforts have been taken to integrate more and more renewable energy generation into energy supply. Wind energy is a clean, renewable and relatively inexpensive source of renewable energy, which is considered as one of the most developed and cost-effective renewable energy technologies. Wind turbines can be situated either onshore or offshore. The world market for wind turbines saw rapid growth in the first half of the year 2010, with approximately 16 GW of new capacity added worldwide where China represents the largest market and added 7.8 GW within six months, with a total installation of almost 34 GW. The USA, still number one in total capacity with 36 GW, saw a major decrease in new installations and added only 1.2 GW, followed by India. The five major European countries have shown similar growth in wind energy development markets: Germany added 660 MW, France and the UK 500 MW, Italy 450 MW and Spain 400 MW. The total capacity of all wind turbines installed worldwide reached 175 GW in mid-2010, compared with 159 GW by the end of 2009. Chapter 17 Power Electronic Control for Wind Generation SystemsWith the development of wind power generation, there is growing penetration of wind energy into power grids. Wind power generation system normally consists of wind turbine, generator and grid interface converters if applicable, among which the generator is one of the core components. In the development of wind power generation techniques, synchronous generator, induction generator and doubly fed induction generator have been employed to convert wind power to electrical power. Wind turbines usually rotate at a speed of 30-50 rev/min, and generators should rotate at a speed of 1000-1500 rev/min, so as to interface with power systems. Hence, a gearbox should be connected between a wind turbine and a generator and it requires regular maintenance, which also causes unpleasant noise, and increases the loss of wind power generation. In order to overcome these problems, the wind power generation with Direct-Drive Permanent Magnet Generator without gearbox was developed. The permanent magnet generator driven directly by the wind turbine is a multi-pole and lo...

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“…The loads are represented by constant impedances. The output limit of excitation system is set to [0,6]. The system data can be found in Reference [20].…”

Section: Computer Simulation Studiesmentioning

confidence: 99%

Dynamic COI‐tracking concept for the control of generators in multi‐machine power systems

Zhou

Gan

Shi

et al. 2007

Int Trans Elec Energy Syst

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SUMMARYIn the conventional excitation control concept, the power angle and frequency of a generator are driven to a pre-designed operation point after the fault occurs. It is named as Constant Point Stabilization (CPS) concept in this paper. A novel concept, called dynamic Center of Inertia (COI)-tracking concept is proposed in this paper. In the concept, the power angle and frequency of each generator track the dynamic COI of the power system. Compared to CPS concept, a salient feature the suggested dynamic COI-tracking concept has is that the generators are not restricted to constant angle point or frequency any longer but track the dynamic COI trajectory of the system to keep synchronous in rotor angle and frequency. Wide area measurement system (WAMS) will be used to transform COI signals to each generator. The time delay within a certain limit of WAMS signals is permitted. To make comparison between the two concepts, the control system models based on the two concepts are first established. Then, using the back-stepping method, two robust controllers are designed to achieve the control objectives of the two concepts. At last, dynamic simulations are carried out based on a 2-area-4-machine test power system, and the control effects of the two controllers, together with that of the conventional AVR þ PSS excitation system, are compared.

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Design of nonlinear robust excitation control for multimachine power systems

Cited by 45 publications

References 1 publication

Analysis and design of different controllers for non-linear power systems

Analysis and design of different controllers for non-linear power systems

Power Electronic Control for Wind Generation Systems

Dynamic COI‐tracking concept for the control of generators in multi‐machine power systems

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