Stability-Constrained Adaptive Droop for Power Sharing in AC-MTDC Grids

Yogarathinam, Amirthagunaraj; Chaudhuri, Nilanjan Ray

doi:10.1109/tpwrs.2018.2890296

Cited by 28 publications

(13 citation statements)

References 34 publications

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“…In processing and storing systems, such as storage voltage and synchronous generators, superconductors are very common [52][53][54]. Indeed, the Super-Leading Magnet Energy Stock (SMES) was developed with supranational properties.…”

Section: Simple Conduction and Supercapacitor Magnetic Energy Storagementioning

confidence: 99%

Comprehensive Survey of Various Energy Storage Technology Used in Hybrid Energy

et al. 2021

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Various power generation technologies, such as wind turbines and solar power plants, have been increasingly installed in renewable energy projects as a result of rising demand and ongoing efforts by global researchers to mitigate environmental effects. The sole source of energy for such generation is nature. The incorporation of the green unit into the power grid also results in volatility. The stabilization of frequencies is critical and depends on the balance of supply and demand. An efficient monitoring scheme called Load Frequency Monitoring (LFM) is introduced to reduce the frequency deviation from its natural state. Specific energy storage systems may be considered to improve the efficiency of the control system. The storage system contributes to the load rate, peak rushing, black start support, etc., in addition to high energy and rapid responsive features. A detailed study of different power storage systems, their current business scenario, and the application of LFM facilities, as well as their analysis and disturbance, is presented in this paper. According to the literature analysis, the current approaches can be divided into two categories: grid and load scale structures. This article also distinguishes between the organized aggregate system and the uncoordinated system control scheme, both of which have advantages and disadvantages in terms of technology.

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Section: Simple Conduction and Supercapacitor Magnetic Energy Storagementioning

confidence: 99%

Comprehensive Survey of Various Energy Storage Technology Used in Hybrid Energy

et al. 2021

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“…With reference to [21][22][23][24][25], to solve the uncertainty problem arising from the droop coefficients, two methods can be potentially adopted, that is, adaptive droop coefficients and coefficient elimination. In [21], the fuzzy logic-based and model reference-based adaptive droop coefficient design methods are presented to adjust the adaptability of the droop controllers, improving the transient response of the system.…”

Section: Introductionmentioning

confidence: 99%

“…Reference [22] introduces a method that upgrades the droop coefficients based on a sliding mode strategy to optimize the power-sharing operations. In [23], for the sake of high performance, a stability-constrained adaptive droop approach is proposed for autonomous power-sharing of the grid. In [24], a VSG-based method with adaptive active power and DC voltage droop control is proposed to regulate the voltage and frequency of the grid.…”

Section: Introductionmentioning

confidence: 99%

Robust Errorless-Control-Targeted Technique Based on MPC for Microgrid with Uncertain Electric Vehicle Energy Storage Systems

Liang

Niu

2022

Energies

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Regarding the microgrid with large-scale electric vehicle (EV) energy storage systems working at the vehicle-to-grid (V2G) mode, uncertain factors (e.g., the number of EVs feeding the microgrid shifts frequently) make the system unfixed, leading to the fact that it is difficult to precisely determine the real-time droop coefficients of the system, thereby degrading the performance of the traditional inverter control strategies that rely on the droop coefficients. To solve the problem, this paper proposes an errorless-control-targeted double control loop (DCL) technique based on robust MPC to control the microgrid with EV energy storage systems without using droop coefficients. Firstly, the structure of the DCL method is developed, with each component in the structure detailed. Compared to the traditional control strategies, the novel one regards the frequency, voltage, and currents as the control objectives instead of active/inactive power. It deserves to be mentioned that the frequency and voltage are regulated by proportional-integral controllers, while the currents are regulated by the finite control set model predictive control (FCS-MPC) method. Secondly, the impacts of system parameter uncertainties on the prediction accuracy of the FCS-MPC controller are analyzed clearly, illustrating that it is necessary to develop effective techniques to enhance the robustness of the controller. Thirdly, sliding mode observers (SMO) based on a novel hyperbolic function are constructed to detect the real-time disturbances, which can be used to generate voltage compensations by using automatic disturbance regulators. Then, the voltage compensations are adopted to establish a modified predicting plant model (PPM) used for the FCS-MPC controller. By using the proposed SMO-based disturbance detection and compensation techniques, the MPC controller gains a strong robustness against parameter uncertainties. Finally, a simulation is conducted on a microgrid system to verify the effectiveness of the proposed techniques, and the obtained results are compared with the traditional virtual synchronous machine (VSG) strategy relying on droop coefficients.

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“…Furthermore, the risky and non-risky outages are not identified. The AC side's frequency stability following an outage in MTDC networks is studied in [18][19][20]. Nonetheless, this research studied the AC side stability, while the DC side's voltage stability has not been investigated.…”

Section: Introductionmentioning

confidence: 99%

Multi-Terminal HVDC System With Offshore Wind Farms Under Anomalous Conditions: Stability Assessment

2021

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Droop control is widely adopted to control Multi-Terminal high-voltage Direct Current (MTDC) systems with offshore wind farms. During permanent faults, the faulty line should be isolated promptly to preserve a high reliability of the MTDC system. This paper examines the MTDC system performance following a faulty line outage. This study aims to identify the outage types that may lead to a complete loss of system voltage stability and the outages that may have a secondary effect on the system. Moreover, strategies for dealing with outages that may lead to a complete shutdown of the system are also presented. Furthermore, the ranges of droop gains' values that can be employed following fault occurrence to preserve system transient stability are studied. Different scenarios are explored during faulty conditions such as surplus and sparsity of wind power, line overcurrent, outage of lines connected to wind farms, and outage of lines connected to AC grids to validate this study. MATLAB/Simulink platform has been employed to elucidate the presented concept.

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Stability-Constrained Adaptive Droop for Power Sharing in AC-MTDC Grids

Cited by 28 publications

References 34 publications

Comprehensive Survey of Various Energy Storage Technology Used in Hybrid Energy

Comprehensive Survey of Various Energy Storage Technology Used in Hybrid Energy

Robust Errorless-Control-Targeted Technique Based on MPC for Microgrid with Uncertain Electric Vehicle Energy Storage Systems

Multi-Terminal HVDC System With Offshore Wind Farms Under Anomalous Conditions: Stability Assessment

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