A new centralized active and reactive power control strategy for voltage regulation in power distribution networks with high penetration of photovoltaic generation

The paper includes the analysis of the operation of low-voltage prosumer installation consisting of receivers and electricity sources and equipped with a 3-phase energy storage system. The aim of the storage application is the management of active power within the installation to decrease the total power exchanged with the supplying network and thus reduce energy costs borne by the prosumer. A solution for the effective implementation of the storage system is presented. Apart from the active power management performed according to the prosumer’s needs, the storage inverter provides the ancillary service of voltage regulation in the network according to the requirements of the network operator. A control strategy involving algorithms for voltage regulation without prejudice to the prosumer’s interest is described in the paper. Reactive power is used first as a control signal and if the required voltage effect cannot be reached, then the active power in the controlled phase is additionally changed and the Energy Storage System (ESS) loading is redistributed in phases in such a way that the total active power set by the prosumer program remains unchanged. The efficiency of the control strategy was tested by means of a simulation model in the PSCAD/EMTDC program. The results of the simulations are presented.

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A New Active and Reactive Power Control Strategy for Multifrequency Microgrid in Islanded Mode

2021 5th International Conference on Smart Grid and Smart Cities (ICSGSC) ◽

10.1109/icsgsc52434.2021.9490493 ◽

2021 ◽

Author(s):

Rajdip Dey ◽

Shabari Nath

Keyword(s):

Power Control ◽

Control Strategy ◽

Reactive Power ◽

Reactive Power Control ◽

Active And Reactive Power ◽

Islanded Mode

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Adaptive Day-Ahead Prediction of Resilient Power Distribution Network Partitions

10.36227/techrxiv.13518611 ◽

2021 ◽

Author(s):

Chinmay Shah ◽

Richard Wies

Keyword(s):

Power Distribution ◽

Renewable Energy Sources ◽

Optimization Technique ◽

Distribution Network ◽

Distribution Networks ◽

Optimization Techniques ◽

Power Distribution Networks ◽

Power Distribution Network ◽

High Penetration ◽

Islanded Mode

The conventional power distribution network is being transformed drastically due to high penetration of renewable energy sources (RES) and energy storage. The optimal scheduling and dispatch is important to better harness the energy from intermittent RES. Traditional centralized optimization techniques limit the size of the problem and hence distributed techniques are adopted. The distributed optimization technique partitions the power distribution network into sub-networks which solves the local sub problem and exchanges information with the neighboring sub-networks for the global update. This paper presents an adaptive spectral graph partitioning algorithm based on vertex migration while maintaining computational load balanced for synchronization, active power balance and sub-network resiliency. The parameters that define the resiliency metrics of power distribution networks are discussed and leveraged for better operation of sub-networks in grid connected mode as well as islanded mode. The adaptive partition of the IEEE 123-bus network into resilient sub-networks is demonstrated in this paper.

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Decentralised-distributed hybrid voltage regulation of power distribution networks based on power inverters

IET Generation Transmission & Distribution ◽

10.1049/iet-gtd.2018.5428 ◽

2019 ◽

Vol 13 (3) ◽

pp. 444-451 ◽

Cited By ~ 11

Author(s):

Yu Wang ◽

Yan Xu ◽

Yi Tang ◽

Mazheruddin Hussain Syed ◽

Efren Guillo-Sansano ◽

...

Keyword(s):

Power Distribution ◽

Distribution Networks ◽

Voltage Regulation ◽

Power Distribution Networks ◽

Power Inverters

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Power Control of Photovoltaic Inverter under Unbalanced Grid Faults Considering Limits of Its Current Harmonics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.960-961.1356 ◽

2014 ◽

Vol 960-961 ◽

pp. 1356-1360 ◽

Cited By ~ 1

Author(s):

Yu Zhou ◽

Zhi Yong Dai ◽

Qiang Gang Wang ◽

Ling Ye ◽

Nian Cheng Zhou

Keyword(s):

Power Control ◽

Control Strategy ◽

Reactive Power ◽

Harmonic Distortion ◽

Optimal Parameters ◽

Current Harmonics ◽

Power Characteristics ◽

Active And Reactive Power ◽

Fluctuation Amplitude ◽

Unbalanced Grid

This paper studies the instantaneous output power characteristics of photovoltaic inverters and its flexible power control strategy under unbalanced grid faults. Then the optimal parameters model of the power control is established with minimum integrated fluctuation amplitude of the active and reactive power as a goal when the constraint of the output current harmonic distortion of photovoltaic inverters is taken into account. Finally, the optimal power control of photovoltaic inverters based on dead-beat current tracking is realized and the feasibility of the proposed control strategy is verified with the power system transient software PSCAD/EMTDC.

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Analysis on Power Output Capability and its Power Control Strategy of DFIG Wind Turbine under Unbalanced Grid Voltage

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.1819 ◽

2013 ◽

Vol 448-453 ◽

pp. 1819-1824

Author(s):

Shu Ju Hu ◽

Ling Ling Wang ◽

Ya Deng

Keyword(s):

Power Control ◽

Wind Turbine ◽

Control Strategy ◽

Power Output ◽

Reactive Power ◽

Maximum Output ◽

Voltage Sags ◽

Active And Reactive Power ◽

Unbalanced Voltage ◽

Power Limit

Wind turbines are required by gird codes that active and reactive power should be fed into power grid during gird faults such as voltage sags. Power output capability is important for DFIG wind turbine to provide active and reactive power support. Constraints of stator, rotor maximum current and maximum output voltage of rotor-side converter (RSC) of DFIG are considered to analyze stator power output limit of the DFIG under unbalanced voltage sags, and newton-raphson method is used to solve the power limits, then the power control strategy based on power limit analysis is proposed. Simulation, calculation and comparison are carried out by a 1.5MW DFIG wind turbine model, and the effectiveness of the analysis and the proposed control strategy is verified.

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