An efficient load flow solution for distribution system with addition of distributed generation using improved harmony search algorithms

After distribution network with PV type distributed generation, it emerged PV nodes. Advanced forward and backward substitution method is proposed based on ant colony optimization method to improve power flow solution, which is a method based on ant colony optimization calculation algorithm of reactive power correction, improved the model of PV type distributed generation in the power flow calculation.Use PSSSINCAL power system simulation software to set up the model of distribution System including PV type distributed generation. Through the results of simulation calculation show that the algorithm can cope with power flow solution for distribution system including PV type distributed generation effectively, and the convergence property is very good.

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Impacts of Photovoltaic Distributed Generation Location and Size on Distribution Power System Network

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v9.i2.pp905-913 ◽

2018 ◽

Vol 9 (2) ◽

pp. 905 ◽

Cited By ~ 3

Author(s):

N. Md. Saad ◽

M. Z. Sujod ◽

Lee Hui Ming ◽

M. F. Abas ◽

M. S. Jadin ◽

...

Keyword(s):

Power Systems ◽

Distributed Generation ◽

Distribution System ◽

Short Circuit ◽

Rapid Development ◽

Reducing Power ◽

Load Flow ◽

Voltage Profile ◽

Power Losses ◽

Distribution Grid

As the rapid development of photovoltaic (PV) technology in recent years with the growth of electricity demand, integration of photovoltaic distributed generation (PVDG) to the distribution system is emerging to fulfil the demand. There are benefits and drawbacks to the distribution system due to the penetration of PVDG. This paper discussed and investigated the impacts of PVDG location and size on distribution power systems. The medium voltage distribution network is connected to the grid with the load being supplied by PVDG. Load flow and short circuit calculation are analyzed by using DigSILENT Power Factory Software. Comparisons have been made between the typical distribution system and the distribution system with the penetration of PVDG. Impacts in which PVDG location and size integrates with distribution system are investigated with the results given from the load flow and short circuit analysis. The results indicate positive impacts on the system interconnected with PVDG such as improving voltage profile, reducing power losses, releasing transmission and distribution grid capacity. It also shows that optimal locations and sizes of DGs are needed to minimize the system’s power losses. On the other hand, it shows that PVDG interconnection to the system can cause reverse power flow at improper DG size and location and increases short circuit level.

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Distributed Network Power Flow of Distributed Generation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.614-615.1693 ◽

2012 ◽

Vol 614-615 ◽

pp. 1693-1699

Author(s):

Qi Yang ◽

Meng Cong Liu ◽

Ying Chen ◽

Yun Xiao Bai

Keyword(s):

Distributed Generation ◽

Distribution System ◽

Power Flow ◽

Simulation Method ◽

Energy System ◽

Load Flow ◽

Probabilistic Load Flow ◽

Probabilistic Load ◽

Node Voltage ◽

The Impact

With constrains imposed by natural conditions, the power generated from wind power, solar power and other intermittent energy system has great randomness and volatility. Thus, the impact from the intermittent energy to the system voltage and power flow is uncertainty. In view of this problem, this paper studies the characteristics of these double random variables and correlation. By using the typical probabilistic load flow and Monte Carlo simulation method, this paper poses the probability load flow adapted to the intermittent distributed generation. Finally, taking IEEE33 distribution system for example, this paper obtains the mutual relationship between the power from the intermittent distributed generation and the probability distribution of the node voltage, current distribution of each branch.

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