Adaptive droop-based active power curtailment method for overvoltage prevention in low voltage distribution network

Maharjan, Manisha; Tamrakar, Ujjwol; Malla, Naresh; Reis, Fernando B. dos; Ni, Zhen; Hansen, Timothy M.; Tonkoski, Reinaldo

doi:10.1109/eit.2017.8053421

Cited by 6 publications

(5 citation statements)

References 20 publications

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“…However, in these active power control (APC) methods, the droop coefficient is calculated for the worst-case scenario to ensure proper range rather than to prevent the voltage from exceeding the unacceptable limit, thus resulting in under-utilization of the available PV energy. To address this issue, some APC methods adjust the droop coefficient in an adaptive way by employing PV generation forecast or adaptive dynamic programming to reduce the energy loss [44]- [46]. Another method performs APC and restores active power generation by using the communication between the inverter controllers in the network [47].…”

Section: ) Voltage Regulation By Active Power Controlmentioning

confidence: 99%

Review of Power System Support Functions for Inverter-Based Distributed Energy Resources- Standards, Control Algorithms, and Trends

Xue

Chang

2021

IEEE Open J. Power Electron.

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Penetration of renewable energy in power systems has been increasing in the past decades in response to increased global electricity demand and concerns for the environment. Distributed energy resources (DERs) based on renewables have experienced rapid growth thanks to the incentive programs and broad-based participation. With the growing prevalence of DERs, the risk of grid instability and vulnerability increases due to the intermittent nature of renewable energy. At the same time, the voltage and frequency deviation problems emerge more often when the reverse power flow occurs under supply-demand imbalance in distributed power systems. Standards and grid codes have been issued for DER inverters to interconnect with the distribution grid. The updated standard and grid codes expect DERs to provide a variety of power system support functions in order to incorporate higher DER penetration and to maximize DER value to the grid. This paper provides an overview of the power system support functions from renewable DER inverters, which are categorized as: voltage regulation by active/reactive power control, frequency regulation by active power control, voltage ride-through, and frequency ride-through. The benefits and drawbacks of each algorithm are presented and compared with its predecessor, manifesting the logic in the evolution of the algorithms.

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Section: ) Voltage Regulation By Active Power Controlmentioning

confidence: 99%

Review of Power System Support Functions for Inverter-Based Distributed Energy Resources- Standards, Control Algorithms, and Trends

Xue

Chang

2021

IEEE Open J. Power Electron.

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“…ADP is a machine learning-based approach to optimize the performance of dynamic systems over time [32,34]. Figure 4 shows the ADP controller with two neural network structures: the action network and the critic network.…”

Section: Proposed Adaptive Droop Control Designmentioning

confidence: 99%

“…Similar techniques have been endorsed to tackle different power systems problems [28][29][30][31][32][33]. A preliminary study on implementation of APC method with constant droop and ADP control on a simplified distribution model has been presented in [34,35]. In this paper, we extend the ADP controller to quadratic and exponential droops on a typical suburban network in North America.…”

Section: Introductionmentioning

confidence: 99%

Overvoltage Prevention and Curtailment Reduction Using Adaptive Droop-Based Supplementary Control in Smart Inverters

Maharjan

Tamrakar²,

et al. 2021

Applied Sciences

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Recent developments in the renewable energy sector have seen an unprecedented growth in residential photovoltaic (PV) installations. However, high PV penetration levels often lead to overvoltage problems in low-voltage (LV) distribution feeders. Smart inverter control such as active power curtailment (APC)-based overvoltage control can be implemented to overcome these challenges. The APC technique utilizes a constant droop-based approach which curtails power rigidly, which can lead to significant energy curtailment in the LV distribution feeders. In this paper, different variations of the APC technique with linear, quadratic, and exponential droops have been analyzed from the point-of-view of energy curtailment for a LV distribution network in North America. Further, a combinatorial approach using various droop-based APC methods in conjunction with adaptive dynamic programming (ADP) as a supplementary control scheme has also been proposed. The proposed approach minimizes energy curtailment in the LV distribution network by adjusting the droop gains. Simulation results depict that ADP in conjunction with exponential droop reduces the energy curtailment to approximately 50% compared to using the standard linear droop.

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“…An adaptive droop-based control technique to curtail active power is presented for a microgrid or a low-voltage distribution network with high-PV penetration in [19]. It makes use of adaptive dynamic programming to minimise the energy loss in the network due to curtailment while maintaining the voltage under permissible limits.…”

Section: Introductionmentioning

confidence: 99%

“…A similar droop control technique is discussed in [20] for the distribution network with the integration of small-scale wind farms, which makes use of wind turbine pitch control. The technical survey presented various works for a low voltage distribution system, with the main focus on overvoltage mitigation with PV penetration in the present microgrids [15][16][17][18][19]21]. These techniques work specifically for overvoltage condition with little attention towards improving the overall voltage profile.…”

Section: Introductionmentioning

confidence: 99%

DSM for all‐day voltage profile improvement in a microgrid

Swain

2019

IET Renewable Power Generation

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The role of demand side management (DSM) has changed the scenario of control and management in a microgrid. DSM works on real time without utilising any additional equipment in the network. The study proposes an all-day voltage control methodology using DSM. The contribution of this study is threefold. Firstly, a novel method for the day ahead voltage profile improvement is proposed by shifting flexible loads using demand and generation forecast information. Secondly, the proposed method uses only two parameters, the impedance of the network and amount of power injected to the flexible loads, in order to influence the voltage level and to improve overall voltage profile of the system. Thirdly, factor matrix is introduced; it decides which flexible loads to be shifted to regulate voltage within tolerance limits. In order to verify the effectiveness of the proposed voltage control method, it is tested on an low voltage (LV) distribution system considered as a microgrid. The result indicates that when the flexible loads are shifted with proper margin, the voltage of the system is contained within a limit and results in better load distribution throughout the day.

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Adaptive droop-based active power curtailment method for overvoltage prevention in low voltage distribution network

Cited by 6 publications

References 20 publications

Review of Power System Support Functions for Inverter-Based Distributed Energy Resources- Standards, Control Algorithms, and Trends

Review of Power System Support Functions for Inverter-Based Distributed Energy Resources- Standards, Control Algorithms, and Trends

Overvoltage Prevention and Curtailment Reduction Using Adaptive Droop-Based Supplementary Control in Smart Inverters

DSM for all‐day voltage profile improvement in a microgrid

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