New enhanced performance robust control design scheme for grid-connected VSI

This study proposes a new switching model for steady‐state and dynamic analysis of an electric spring (ES). The accuracy of the developed ES model is demonstrated. The developed model is used to design a controller for bus voltage regulation in a distribution network with an intermittent renewable source. The ES controller design problem is formulated as an optimisation problem with a time domain‐based objective function to reduce the time‐weighted voltage deviations. Real coded genetic algorithm is considered for optimal design of the AC and DC PI controllers of the ES. The distribution system with ES is simulated and the developed model is investigated under different types of disturbances and load variations. In addition, the system considered is developed on real time digital simulator and the proposed controllers are implemented on dSPACE DS1103 platform for a hardware‐in‐loop experimental setup. Simulation results have been validated by the experimental results. The results show the effectiveness of the developed model and the proposed controller design approach to enhance greatly the reliability of the distribution network considered.

show abstract

“… Experimental setup (a) Hardware arrangement, (b) Interconnection of various hardware components [26]…”

Section: Resultsmentioning

confidence: 99%

Switching model analysis and implementation of electric spring for voltage regulation in smart grids

Areed

Abido

Al‐Awami

2017

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…(see (36)) The u eq is taken as d st , and its value is limited to a maximum of 0.4 [30]. Corresponding to u eq , the closed-loop system is obtained from (27).…”

Section: Smc Designmentioning

confidence: 99%

“…The grid-tied converter controls the ac-current to regulate both active and reactive powers [2,[35][36][37][38]. The PI controller was found unsuitable for tracking sinusoidal current with ZSSE and characterises with poor disturbance rejection capability [35].…”

Section: Introductionmentioning

confidence: 99%

“…The PI controller was found unsuitable for tracking sinusoidal current with ZSSE and characterises with poor disturbance rejection capability [35]. The deadbeat‐current controller can track the ac‐current but generates tracking error and stability problems [36]. The hysteresis current controller provides ZSSE; however, load and ac‐voltage affect its switching frequency [37].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of three‐level NPC‐q Z S inverter‐based grid‐connected renewable energy system

Singh

Jain

2020

IET Power Electronics

View full text Add to dashboard Cite

The neutral point clamped quasi-Z-source (NPC-qZS) inverter is poised to become a potential candidate for renewable energy applications because it yields a continuous input current and voltage boost. In this study, the closed-loop control of grid-tied three-phase (3-ϕ) NPC-qZS inverter, fed with renewable energy sources, is proposed for the first time. A dynamic model has been developed to accurately design the control strategy. The proposed strategy includes the control of grid-tied current and the peak dc-link voltage (PDV). The control of grid-tied current is achieved through a damped-secondorder-generalised integrator. The PDV is estimated indirectly from the voltages of qZS network capacitors and is regulated by an integral-double-lead controller. Two modified modulation techniques based on phase-opposite disposition and in-phase disposition are proposed to yield shoot through by injecting 3rd harmonics for maximum constant boost control. A comparison is drawn between the performance of the proposed controller and sliding-mode controller on the dc side. The controller design and system performance are validated through real-time simulation and experimentation on a practical setup in the laboratory.

show abstract

“…Although most works have made considerable achievements in solving the stability problem, they disregarded the impact of the total dynamic response performance of the VSI output control part on the implementation of control strategies (especially for the overshoot and oscillation superpositions of multiple PI controllers). Some other works (such as the use of the FCS-PI control method [25] and robust control method [31]) improved the dynamic performance of the PI controllers. However, the overshoot, low response speed, steady-state errors, oscillations, and fluctuation in the dynamic response process cannot be avoided when the different control levels are linked to form a complex control loop.…”

Section: Analysis Of Vsi Control Network Consisting Of Pi Controllersmentioning

confidence: 99%

Output Control Method of Microgrid VSI Control Network Based on Dynamic Matrix Control Algorithm

et al. 2019

View full text Add to dashboard Cite

New enhanced performance robust control design scheme for grid-connected VSI

Cited by 8 publications

References 33 publications

Switching model analysis and implementation of electric spring for voltage regulation in smart grids

Switching model analysis and implementation of electric spring for voltage regulation in smart grids

Investigation of three‐level NPC‐q Z S inverter‐based grid‐connected renewable energy system

Output Control Method of Microgrid VSI Control Network Based on Dynamic Matrix Control Algorithm

Contact Info

Product

Resources

About