Probabilistic Power Flow Model to Study Uncertainty in Power System Network Based Upon Point Estimation Method
Li Bin,
Muhammad Shahzad,
Qi Bing,
Muhammad Raza Zafar,
Rabiul Islam,
Muhammad Umair Shoukat
Issue:
Volume 6, Issue 5, September 2017
Pages:
64-71
Received:
18 July 2017
Accepted:
31 July 2017
Published:
22 August 2017
Abstract: In this paper, point estimation approach is used to calculate the statistical moment of a random quantity that is a function of m input random variables. In this work, loads of the proposed network is considered as a random variable. Two special cases of point estimation approach are considered such as 2m and 2m+1 concentration schemes. In 2m concentration scheme, skewness is considered, but in 2m+1 concentration scheme, both skewness and kurtosis are taken into account for probability density function. The proposed model is investigated using P. M. Anderson 9-bus test system. As a result, by changing the value of a random variable that follows a predefined distribution, expected bus voltage magnitude and expected line loading are identified. For the comparison purpose, 2m and 2m+1 scheme was compared with deterministic load flow analysis.
Abstract: In this paper, point estimation approach is used to calculate the statistical moment of a random quantity that is a function of m input random variables. In this work, loads of the proposed network is considered as a random variable. Two special cases of point estimation approach are considered such as 2m and 2m+1 concentration schemes. In 2m conce...
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Harmonic Mitigation in Three-Phase Power Networks with Photovoltaic Energy Sources
Mohammad Amin Chitsazan,
Andrzej M. Trzynadlowski
Issue:
Volume 6, Issue 5, September 2017
Pages:
72-78
Received:
31 July 2017
Accepted:
7 August 2017
Published:
23 August 2017
Abstract: Energy systems based on photovoltaic (PV) cells have increased at a rapid pace. Therefore, power converters have been widely employed in power systems to enhance the quality and magnitude of the power drawn from renewable energy sources. An LCL filter for connection of an inverter to the grid is often used to reduce harmonics generated by the inverter. According to different design techniques, optimal parameters of LCL filter tend to vary in a wide range. This paper presents a new approach to an LCL filter. A phase shifting transformer placed in the structure of an LCL filter to minimize harmonic current. Methods and techniques described in this paper are particularly suitable for grid-connected PV power systems.
Abstract: Energy systems based on photovoltaic (PV) cells have increased at a rapid pace. Therefore, power converters have been widely employed in power systems to enhance the quality and magnitude of the power drawn from renewable energy sources. An LCL filter for connection of an inverter to the grid is often used to reduce harmonics generated by the inver...
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