Journal of Modern Power Systems and Clean Energy
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Security-constrained model for integrated power and natural-gas system
Journal of Modern Power Systems and Clean Energy - Tập 5 - Trang 326-336 - 2017
One of the main factors impacting the reliability of energy systems nowadays is
the growing interdependence between electricity and gas networks due to the
increase in the installation of gas-fired units. Security-constrained unit
commitment (SCUC) models are used to economically schedule generating units
without compromising the system reliability. This paper proposes a novel SCUC
formulation tha...
Power hardware in the loop validation of fault ride through of VSC HVDC connected offshore wind power plants
Journal of Modern Power Systems and Clean Energy - Tập 2 - Trang 23-29 - 2014
This paper presents the power hardware in the loop (PHIL) validation of a feed
forward DC voltage control scheme for the fault ride through (FRT) of voltage
source converter (VSC) high voltage DC (HVDC) connected offshore wind power
plants (WPPs). In the proposed FRT scheme, the WPP collector network AC voltage
is actively controlled by considering both the DC voltage error and the AC
current from...
Carrier dynamic overlapping switching frequency optimal pulse width modulation method for modular multilevel converters
Journal of Modern Power Systems and Clean Energy - Tập 6 - Trang 1306-1318 - 2018
Modular multilevel converters (MMCs) operate in the low modulation index region
in many applications. However, when utilized at the low modulation index region,
large harmonics appear in the output voltage, which degrade the performance of
the MMC. To improve the harmonic characteristic in the low modulation index, the
carrier dynamic overlapping switching frequency optimal pulse width modulation
...
Constant frequency operation of parallel resonant converter for constant-current constant-voltage battery charger applications
Journal of Modern Power Systems and Clean Energy - Tập 7 - Trang 186-199 - 2018
This paper proposes a design and control approach to parallel resonant converter
(PRC) based battery chargers. The proposed approach is particularly suitable for
the constant-current constant-voltage (CC-CV) charging method, which is the most
commonly utilized one. Since the PRC is operated at two different frequencies
for each CC and CV charging modes, this approach eliminates the need for
compli...
Impact of phase-locked loop on stability of active damped LCL-filter-based grid-connected inverters with capacitor voltage feedback
Journal of Modern Power Systems and Clean Energy - Tập 5 - Trang 574-583 - 2017
Active damped LCL-filter-based inverters have been widely used for
grid-connected distributed generation (DG) systems. In weak grids, however, the
phase-locked loop (PLL) dynamics may detrimentally affect the stability of
grid-connected inverters due to interaction between the PLL and the controller.
In order to solve the problem, the impact of PLL dynamics on small-signal
stability is investigate...
Online voltage estimation and control for smart distribution networks
Journal of Modern Power Systems and Clean Energy - Tập 4 - Trang 40-46 - 2016
The increasing deployment of Distributed Generation (DG) technologies introduces
power quality challenges to the grid, in particular steady state voltage rise at
the connection point for DG units. In most distribution networks, control and
monitoring of grid parameters is missing, as well as system security is at risk.
Smart grid technologies have the capability to realize the real-time
measuremen...
Long-term forecasting of annual peak load considering effects of demand-side programs
Journal of Modern Power Systems and Clean Energy - Tập 6 - Trang 145-157 - 2017
The main purpose of this research paper is to investigate the long-term effects
of the proposed demand-side program, and its impact on annual peak load
forecasting important for strategic network planning. The program comprises a
particular set of demand-side measures aimed at reducing the annual peak load.
The paper also presents the program simulations for the case study of the
Electricity Distr...
Transient characteristics and adaptive fault ride through control strategy of DFIGs considering voltage phase angle jump
Journal of Modern Power Systems and Clean Energy - Tập 5 - Trang 757-766 - 2016
Wind power in China has experienced fast development in recent years. However,
areas rich in wind power resources are often far away from loads centers, which
leads to weak connection between wind turbines and power grid. When a grid fault
occurs, new transient characteristics in weak grid integrated with doubly-fed
induction generators (DFIGs) may present, such as voltage phase angle jump.
Curren...
A novel genetic algorithm based on all spanning trees of undirected graph for distribution network reconfiguration
Journal of Modern Power Systems and Clean Energy - Tập 2 - Trang 143-149 - 2014
Network reconfiguration is of theoretical and practical significance to
guarantee safe and economical operation of distribution system. In this paper,
based on all spanning trees of undirected graph, a novel genetic algorithm for
electric distribution network reconfiguration is proposed. Above all, all
spanning trees of simplified graph of distribution network are found. Tie
branches are obtained ...
Stochastic optimization of cost-risk for integrated energy system considering wind and solar power correlated
Journal of Modern Power Systems and Clean Energy - Tập 7 - Trang 1472-1483 - 2019
Due to the growing penetration of renewable energies (REs) in integrated energy
system (IES), it is imperative to assess and reduce the negative impacts caused
by the uncertain REs. In this paper, an unscented transformation-based
mean-standard (UT-MS) deviation model is proposed for the stochastic
optimization of cost-risk for IES operation considering wind and solar power
correlated. The unscent...
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