The impact of large-scale distributed generation on power grid and microgrids

2014 ◽  
Vol 62 ◽  
pp. 417-423 ◽  
Author(s):  
Qian Ai ◽  
Xiaohong Wang ◽  
Xing He
Keyword(s):  
Distributed Generation ◽  
Large Scale ◽  
Power Grid ◽  
The Impact

scholarly journals Impacts of Distributed Generation in Electrical Grids

2020 ◽  
Author(s):  
Maria Cecilia C. Lima ◽  
Handerson Marques ◽  
Thommas Kevin Sales Flores ◽  
Fabiano Salvadori ◽  
Lucas V. Hartmann ◽  
...  
Keyword(s):  
Distributed Generation ◽  
Power Factor ◽  
Power Grid ◽  
Energy Sources ◽  
Impedance Matrix ◽  
Electrical Grid ◽  
Preliminary Results ◽  
Electrical Grids ◽  
Common Coupling ◽  
The Impact

Unconventional energy sources such as wind, solar and biomass represents more and more an alternative in substitution of conventional energy sources. In effect, many studies still need to be done to clearly identify the impacts that the insertion of distributed generation (DG) sources represent in the power grid. In this paper, an analysis of the impact of the distributed generation (DG) insertion in the electrical grid is realized, based on impedance matrix, grid voltage and power factor (PF). Benchmarks were created to relate the sensibility in a point common coupling (PCC) to the DG insertion. Preliminary results show that sensibility does not change with the load or the PF of the DG.

Impact of Large-Scale Integrated Wind Farms on the Small Signal Stability of Power System

2013 ◽  
Vol 805-806 ◽  
pp. 393-396
Author(s):  
Zhen Yu Xu ◽  
Zhen Qiao ◽  
Qian He ◽  
Xu Zhang ◽  
Jing Qi Su
Keyword(s):  
Power System ◽  
Large Scale ◽  
Power Grid ◽  
Wind Farms ◽  
Small Signal ◽  
Small Signal Stability ◽  
Direct Drive ◽  
Signal Model ◽  
Signal Stability ◽  
The Impact

With the penetration of wind energy is becoming higher and higher in power grid, it is very important to investigate the impact of wind generations on small signal stability. In this paper, a complete small signal model of wind turbine with direct-drive permanent magnet generator is built to study the impact of large-scale wind farms on the small signal stability of power system. By means of simulation and eigenvalue analysis, an actual power system is investigated, and the damping characteristic of power grid under different wind power penetration is discussed.

scholarly journals The Influence of Decentralized Wind Power on the Characteristics of Distribution Network

2021 ◽  
Vol 261 ◽  
pp. 01037
Author(s):  
Ruomeng Jiang
Keyword(s):  
Wind Power ◽  
Power Flow ◽  
Large Scale ◽  
Power Grid ◽  
Distribution Network ◽  
Flow Distribution ◽  
Voltage Level ◽  
Negative Impacts ◽  
The Impact ◽  
Planning And Operation

This paper expounds the influence of decentralized wind power on the characteristics of distribution network. Through analysis, it can be concluded that after installing an appropriate amount of decentralized wind power, the voltage level of load bus can be improved. The power flow distribution will be changed, and the network loss of the power grid will be reduced. The decentralized wind power has also brought about negative impacts, such as voltage flicker and harmonics, the impact on the scope and direction of protection of relay protection, and greater uncertainty in the planning and operation of regional power grid. The analysis above provides some theoretical guidance for the large-scale development of decentralized wind power in the future.

Impact of Large-Scale Integrated Wind Farms on the Voltage Stability of Regional Power System

2013 ◽  
Vol 724-725 ◽  
pp. 659-663 ◽  
Author(s):  
Qian He ◽  
Zhen Yu Xu ◽  
Zhen Qiao ◽  
Xu Zhang
Keyword(s):  
Large Scale ◽  
Voltage Stability ◽  
Power Grid ◽  
Wind Farms ◽  
Regional Power ◽  
Variable Speed Wind Turbine ◽  
Transient Voltage Stability ◽  
Transient Voltage ◽  
Doubly Fed ◽  
The Impact

In this paper, a variable speed wind turbine model based on doubly-fed induction generator (DFIG) and a section of a practical power grid model to be studied are implemented in DIgSILENT / PowerFactory. The static voltage stability and the transient voltage stability of the regional power grid with high wind power penetration will be studied. Moreover, this paper will focus on the impact of static var compensator (SVC) on both steady state voltage stability and transient voltage stability.

scholarly journals Analysis on the Impact of Geomagnetic Storm on Reactive Power and Voltage in Extrahigh Voltage Power Grid

2019 ◽  
Vol 118 ◽  
pp. 02049
Author(s):  
Lan Kang ◽  
Bin He ◽  
Peihong Yang ◽  
Xiaoling Dong
Keyword(s):  
Geomagnetic Storm ◽  
Power Loss ◽  
Large Scale ◽  
Reactive Power ◽  
Geomagnetic Storms ◽  
Power Grid ◽  
Geomagnetically Induced Currents ◽  
Voltage Level ◽  
The Impact ◽  
First Time

With the growing scale of the power grid and the improvement of the voltage level, the geomagnetically induced currents (GICs) generated by geomagnetic storms has become one of the leading factors that cause large-scale power outages in power grid. Considering the global simultaneity characteristic of geomagnetic storms, this paper presents the concept of mass reactive power disturbance for the first time, analyzes the mechanism of GIC reactive power loss of transformer and reveals the mechanism of mass reactive power disturbance’s influence on voltage. Finally, combined with the practical situation of 750kV EHV power grid in China, the reactive power loss and voltage distribution under the geomagnetic storms at various intensities are calculated, with the grid operating in two typical modes, and the impact of the geomagnetic storm on voltage is illustrated, which provides the theoretical basis for the study of voltage stability.

Analyses on Integration of Wind Power into Gansu Power Grid

2012 ◽  
Vol 608-609 ◽  
pp. 569-572 ◽  
Author(s):  
Xi Chao Zhou ◽  
Fu Chao Liu ◽  
Jing Jing Zheng
Keyword(s):  
Wind Power ◽  
Large Scale ◽  
Transient Stability ◽  
Power Grid ◽  
Wind Farms ◽  
Chinese Government ◽  
Wind Power Integration ◽  
Grid Operation ◽  
Installed Capacity ◽  
The Impact

In recent years, wind power penetration into the grid has increased rapidly with abundant wind resources in Jiuquan, according to the policy of the Chinese government to “establish a ‘Hexi Wind Power Corridor’ and rebuild another Western ‘Terrestrial Three Gorges Dam’”. By the end of 2010, the total installed capacity of wind power in Jiuquan has reached 5160 MW. The wind farms are connected to 110 kV transmission network or above in Jiuquan, the studies of their impacts on the grid, in particular, the grid operation are becoming serious and urgent. Jiuquan is far away from the load center with a weak grid configuration, therefore issues such as transmission line overloading, local grid voltage fluctuation, and transient stability limitation are looming with large scale wind power integration. The power system dispatch and operation are influenced by the intermittent nature of the wind power, which should be regulated by the system reserves. This paper discusses the recent integration of wind power into the grid with a focus on the impact on the Gansu power grid operation. The paper also presents the measures to deal with these issues.

scholarly journals Research on voltage stability and control strategy of power system considering grid connected charging of electric vehicles

2021 ◽  
Vol 2121 (1) ◽  
pp. 012020
Author(s):  
Weidong Fang ◽  
Hao Lv ◽  
Yiting Jiang ◽  
Lingzhi Li
Keyword(s):  
Electric Vehicles ◽  
Energy Demand ◽  
Large Scale ◽  
Voltage Stability ◽  
Power Grid ◽  
Stable Operation ◽  
Charging Station ◽  
New Energy ◽  
The Stability ◽  
The Impact

Abstract The development of new energy vehicles is an important measure to deal with the growing energy demand and climate change. Especially in recent years, with the support of national policies and the maturity of electric vehicles(EVs) related technologies, the number of EVs has increased explosively, and the situation is very good. However, it also means that a large number of charging loads will be connected to the power grid, which will put great pressure on the safe and stable operation of the power grid. Although there have been many studies on the impact of EVs integration into modern power grid, most of the EVs load models are based on probability function and lack accuracy. Therefore, starting with the actual operation data of EVs charging station, this paper studies the influence of a large number of EVs charging loads on the static voltage stability of power grid. It is found that the charging load of large-scale EVs is added to the power grid, which significantly reduces the stability of power grid voltage, especially at the place connected to the EVs load and far away from the balance node. In addition, when the charging station adopts the time-of-use(TOU) price strategy, it can effectively improve the voltage stability of the whole network.

Sign in / Sign up

Export Citation Format

Share Document