Reachability analysis for a grid-connected voltage-sourced converter (VSC)

Shabestari, Parisa M.; Ziaeinejad, Saleh; Mehrizi‐Sani, Ali

doi:10.1109/apec.2018.8341344

Cited by 14 publications

(12 citation statements)

References 9 publications

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“…Medium-voltage dc and high-voltage dc grids have been the focus of many research studies recently regarding their increasing applications in rapidly growing grid-connected renewable energy systems, such as wind, solar and wave farms [10][11][12][13][14][15]. To connect dc renewable resources to the grid Voltage Sourced Converters (VSC) are used commonly [16]. Moreover, VSC's can be used in MVDC and HVDC systems to connect ac sources to the dc bus [16].…”

Section: Medium-voltage Step Up DC / Dc Convertersmentioning

confidence: 99%

“…To connect dc renewable resources to the grid Voltage Sourced Converters (VSC) are used commonly [16]. Moreover, VSC's can be used in MVDC and HVDC systems to connect ac sources to the dc bus [16]. Due to higher efficiency and flexibility, the MVDC systems are being considered as alternatives to ac distribution networks.…”

Section: Medium-voltage Step Up DC / Dc Convertersmentioning

confidence: 99%

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Untitled

2018

International Advanced Research Journal in Science, Engineering

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For the past few years, interest in wave energy is growing very fast. The ocean holds massive amount of clean and untouched energy, which can show an important role in supplying our energy demand. It is approximated that total energy from the coast of the United States is 252 million MWh/year. Oceans and sees around the world contain plentiful amount of energy that exceeds today's power generation needs. Wave Energy Converters (WEC) are devices to convert wave energy into electrical energy. One example of WEC technology is Oscillating Water Columns (OWCs). OWCs are devices with a semi-submerged chamber or hollow open to the sea below, keeping a trapped air pocket above a water column. Waves force the column to act like a piston, moving up and down, forcing the air out of the chamber and back into it. This continuous movement force a bidirectional stream of high-velocity air, which is channelled through a Power-TakeOff (PTO). The PTO system converts the airflow into energy. This paper discusses different types of wave energy converters and challenges regarding their integration to power grid.

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Section: Medium-voltage Step Up DC / Dc Convertersmentioning

confidence: 99%

Section: Medium-voltage Step Up DC / Dc Convertersmentioning

confidence: 99%

Untitled

2018

International Advanced Research Journal in Science, Engineering

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“…In [22], a generic nonlinear multi-input single-output self-tuning controller is employed to damp the oscillations under various post-disturbance operating conditions, and the proposed method has been proved to be superior to the conventional model-based controller. Additionally, considering parameter uncertainties in systems, reachability analysis is used in [23] for controller tuning, which can ensure stable operation against parameter uncertainties in power systems.…”

Section: Introductionmentioning

confidence: 99%

Dual-Loop-Based Current Controller for Transformerless Grid-Tied Converters with Improved Disturbance Attenuation against Voltage Measurement Errors

Song

Yun

2019

Energies

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To eliminate current harmonics and to obtain enhanced dynamic behaviors, the voltage feedforward scheme is normally adopted in the control process of transformerless grid-tied converters. However, voltage measurement errors caused by parameter variation of sampling resistance and zero-voltage drift in analog devices will result in DC current injection and distorted grid currents in grid-tied systems. Conventional compensation strategies based on plug-in repetitive controllers and multiple resonant controllers are considered to be effective solutions to solve this problem. Even though undesired components in grid currents can be partially mitigated with these conventional compensation schemes adopted, degraded reference-tracking process with oscillations and slow dynamics are inevitably caused by the controller coupling. To obtain decoupling between reference tracking and disturbance rejection, this paper proposes a dual-loop controller to achieve current regulation and to suppress the disturbances caused by voltage measurement errors. With the proposed dual-loop controller adopted, DC current injection and distortion of grid currents can be effectively attenuated while excellent transient performance with negligible overshoot and fast step response can be simultaneously guaranteed. Frequency-domain analysis and experimental validations are both conducted to verify the effectiveness of the proposed strategy.

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“…Different kinds of DC-AC converters can be expected to be used in the automotive powertrains. Most applications use the Voltage Source Inverter [7,8], but also multilevel inverters [9,10] and Current Source Inverters [9] are becoming an option. Voltage Source Inverters are the most commonly used inverters.…”

Section: Introductionmentioning

confidence: 99%

Digital Control of an Interleaving Operated Buck-Boost Synchronous Converter Used in a Low-Cost Testing System for an Automotive Powertrain

2018

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Based on the standardization in the automotive industry, systems require extensive testing, which represents significant costs regarding personnel and equipment. The testing systems must be built in such a way that a bidirectional power flow is possible between the power source and the tested system. Additionally, applied testing systems have to possess high disturbance immunity. Classical current programmed control performed using an analogue approach suffers from low disturbance rejection during switching operation. The digital control of DC-DC converter can solve this problem with the use of digital integration in a measurement chain. The integrals of values are obtained by using a Voltage Control Oscillator (VCO) and appropriate counters. Digital control of an interleaving operated bidirectional buck-boost synchronous converter can be applied in the testing system for automotive powertrains. The voltage and current measurements with the application of an integral-measurement principle act as low-pass filters, which remove the disturbances from the measured values. The digital implementation of a compensation ramp (current mode control) and method for choice of control parameters are described. All the tasks for measurements, as well as current and voltage control, were implemented within the FPGA (Field Programmable Gate Array). The presented converter can operate as a close to ideal voltage or current source, and satisfies the requirements of testing electric motor drive-trains with bidirectional DC-AC converters that are applied in automotive applications. The proposed system was verified by simulation and experiments.

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Reachability analysis for a grid-connected voltage-sourced converter (VSC)

Cited by 14 publications

References 9 publications

Untitled

Untitled

Dual-Loop-Based Current Controller for Transformerless Grid-Tied Converters with Improved Disturbance Attenuation against Voltage Measurement Errors

Digital Control of an Interleaving Operated Buck-Boost Synchronous Converter Used in a Low-Cost Testing System for an Automotive Powertrain

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