scholarly journals Application of VSG technology based on flexible parameter adjustment in PV unit grid-connected inverter

2021 ◽  
Vol 2076 (1) ◽  
pp. 012118
Author(s):  
Penghui Zhao ◽  
Peng Wu ◽  
Shuai Zhang ◽  
Ning Wang ◽  
Yan Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Systems ◽  
Damping Coefficient ◽  
Parameter Adjustment ◽  
Grid Connection ◽  
Adjustment Strategy ◽  
Virtual Inertia ◽  
Grid Connected Inverter ◽  
System Frequency ◽  
Storage Units

Abstract As a clean and effective renewable energy source, PV has been widely used in power systems. The application of VSG technology can effectively improve the system inertia reduction problem caused by the grid connection of PV and energy storage units. The virtual inertia and damping coefficient in VSG control have the unique advantages of being flexible and controllable. This paper designs a control strategy in which the virtual inertia and damping coefficient can be flexibly adjusted according to the system frequency, which further improves the operating performance of the PV and energy storage units based on VSG control. The frequency quality of the system is maintained. Finally, the effectiveness of the proposed flexible parameter adjustment strategy was verified through the simulation platform, which played a role in popularizing the application of the proposed strategy in engineering.

scholarly journals Distributed Building Energy Storage Units for Frequency Control Service in Power Systems

2019 ◽  
Vol 52 (4) ◽  
pp. 228-233 ◽  
Author(s):  
Thom S. Badings ◽  
Vahab Rostampour ◽  
Jacquelien M.A. Scherpen
Keyword(s):  
Energy Storage ◽  
Power Systems ◽  
Frequency Control ◽  
Building Energy ◽  
Storage Units ◽  
Control Service

scholarly journals Flywheel Energy Storage and Dump Load to Control the Active Power Excess in a Wind Diesel Power System

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2029 ◽  
Author(s):  
Rafael Sebastián ◽  
Rafael Peña-Alzola
Keyword(s):  
Energy Storage ◽  
Power Systems ◽  
Storage System ◽  
Circuit Breaker ◽  
Continuous System ◽  
Energy Storage System ◽  
Active Power ◽  
Flywheel Energy Storage ◽  
Excess Power ◽  
System Frequency

Wind Diesel Power Systems (WDPS) are isolated microgrids which combine Wind Turbine Generators (WTGs) with Diesel Generators (DGs). The WDPS modelled in this article is composed of a DG, a WTG, consumer load, Dump Load (DL) and a Flywheel Energy Storage System (FESS). In the Wind-Diesel (WD) mode both the DG and WTG supply power to the consumers. The WDPS is simulated in the WD mode in the case that the WTG produced power exceeds the load consumption. This WTG excess power case is simulated in the subcases of DL and FESS turned off, only-DL and only-FESS. Simulations for the DL and FESS-off case show that the WTG excess power leads to a continuous system frequency increase, so that the tripping of the WTG Circuit Breaker (CB) is required to guarantee the WDPS power supply continuity. Simulations for the only-DL/only-FESS cases show that commanding the DL/FESS to consume controlled power, so that the required DG power to balance the system active power is positive, enables the DE speed governor to regulate the system frequency. Furthermore, the frequency and voltage variations in the DL/FESS cases are moderate and there is no need to trip the WTG-CB, so that the WDPS reliability and power quality are greatly improved. Additionally, the only-FESS case obtains better WDPS relative stability than the only-DL case.

scholarly journals Reduced-Order-VSM-Based Frequency Controller for Wind Turbines

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 528
Author(s):  
Liang Lu ◽  
Oscar Saborío-Romano ◽  
Nicolaos A. Cutululis
Keyword(s):  
Power Systems ◽  
Wind Turbines ◽  
Rate Of Change ◽  
Reduced Order ◽  
Overcurrent Protection ◽  
Virtual Inertia ◽  
Grid Side ◽  
Grid Side Converter ◽  
Frequency Controller ◽  
System Frequency

Frequency support capability is becoming an important requirement for wind turbines, as wind power is increasingly integrated into power systems. In this paper, a frequency controller is implemented and validated. Such a controller allows wind turbines to help regulate the system frequency automatically and includes virtual inertia to help limit the rate of change of frequency. Compared with other methods, the controller achieves satisfactory frequency support capability with considerable simplicity. The controller is added to the grid-side converter controls, together with cascaded inner loops, which enables wind turbines to operate in grid-forming mode with overcurrent protection. The influence of the controller parameters on the frequency response is investigated.

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