Description: 基于异步发电机的配电网潮流计算程序,适合于分布式发电对配网的影响分析-Induction generator based on the distribution power flow calculation program, suitable for distributed generation impact on distribution network analysis Platform: |
Size: 74752 |
Author:liangjingfang |
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Description: In the future, power distribution systems now controlled by large power generators will be
enhanced with more distributed energy resource (DER) architectures in which the demarcations
between providers and users of power are less restrictive. Industry is concerned about how
existing electric power systems (EPSs) can accommodate these changes because they will affect the economics and performance of power delivery. One key area of concern is the technical details of interconnecting distributed generation (DG) with the EPS. Platform: |
Size: 2421760 |
Author:liu ysh |
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Description: 该算法可以计算含DG的配电网优化计算，算例采用IEEE 33 bus test system。-Our algorithm package can solve the distribution active power optimization with the consideration of distributed generation (DG). The test case is based on IEEE 33 bus test base. Enjoy it. Platform: |
Size: 9216 |
Author:polygan |
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Description: Production of energy in centralized power plants
and transmitted via transmission lines to the customers is
always with high power losses. Distributed generation
(DG) especially renewable energy resources (RES) and
energy storage systems (ESS) through distributed system
are very cost saving and sometimes inevitable. If these
small DGs want to connect to power system and participate
in energy market directly, both distribution and energy
market would have many problems with control such a high amount of information and small supplies of DGs. Application of virtual power plant (VPP) as an aggregation of some DGs with own local energy management system and some fix and variable loads is a suitable solution for DGs and networks problems. Platform: |
Size: 625664 |
Author:Ninouh |
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Description: Voltage sags are one of the main problems in transmission
and distribution grids with high penetration of distributed
generation. This paper proposes a voltage support control scheme
for grid-connected power sources under voltage sags. The control
is based on the injection of reactive current with a variable ratio between
positive and negative sequences. The controller determines,
also, the amount of reactive power needed to restore the dropped
voltage magnitudes to new reference values confined within the
continuous operation limits required in grid codes. These reference
values are chosen in order to guarantee low current injection
when fulfilling the voltage support objective. Selected experimental
results are reported in order to validate the effectiveness of the
proposed control. Platform: |
Size: 29696 |
Author:hareesh |
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Description: An increasing number of distributed generation units (DG
units) are connected to the distribution network. These
generators affect the operation and coordination of the
distribution network protection. The influence from DG units
that are coupled to the network with a power electronic
converter (PEC) is different from that of conventional DG
units with an electrical machine directly coupled to the
network. This contribution shows that PEC-based DG units
can be controlled in such a way that the negative influence on
the distribution network protection is limited. A decision tree
and a flow-chart are presented that show how a PEC-based
DG should respond to network faults. The flow-chart can be
used in real time to bring the proper control algorithm in
operation during a fault Platform: |
Size: 3511296 |
Author:ali |
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Description: This paper presents a new method to solve the network
reconfiguration problem in the presence of distributed generation
(DG) with an objective of minimizing real power loss and
improving voltage profile in distribution system. A meta heuristic
Harmony Search Algorithm (HSA) is used to simultaneously reconfigure
and identify the optimal locations for installation of DG
units in a distribution network. Sensitivity analysis is used to identify
optimal locations for installation of DG units. Different scenarios
of DG placement and reconfiguration of network are considered
to study the performance of the proposed method. The
constraints of voltage and branch current carrying capacity are
included in the uation of the objective function. The method
has been tested on 33-bus and 69-bus radial distribution systems
at three different load levels to demonstrate the performance and
effectiveness of the proposed method. The results obtained are encouraging.-This paper presents a new method to solve the network
reconfiguration problem in the presence of distributed generation
(DG) with an objective of minimizing real power loss and
improving voltage profile in distribution system. A meta heuristic
Harmony Search Algorithm (HSA) is used to simultaneously reconfigure
and identify the optimal locations for installation of DG
units in a distribution network. Sensitivity analysis is used to identify
optimal locations for installation of DG units. Different scenarios
of DG placement and reconfiguration of network are considered
to study the performance of the proposed method. The
constraints of voltage and branch current carrying capacity are
included in the uation of the objective function. The method
has been tested on 33-bus and 69-bus radial distribution systems
at three different load levels to demonstrate the performance and
effectiveness of the proposed method. The results obtained are encouraging. Platform: |
Size: 29696 |
Author:hari |
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Description: Paper Abstract – An adaptive control of Distributed Generation (DG)
to provide predictable active power output at the primary
distribution substation is described. Often, distribution networks
accommodate renewable energy different energy sources
and thus using different energy conversion sources. As the
amount of generation that comes intermittent renewable
sources (e.g. wind energy) increases, network operators start to
concern with the uncertainty of generation. However, when the
power output intermittent renewable sources is predicted,
the network operators can reduce the operational costs of the
network and the DG owners may go on the market. Thus, our
challenge with this work was to develop an algorithm which can
predict the active power output the aggregation of wind and
biomass energy at the primary distribution substation of a typical
distribution network. Wind and biomass energy plant are onto
the same distribution network but not necessarily onto the same
feeder.-Paper Abstract – An adaptive control of Distributed Generation (DG)
to provide predictable active power output at the primary
distribution substation is described. Often, distribution networks
accommodate renewable energy different energy sources
and thus using different energy conversion sources. As the
amount of generation that comes intermittent renewable
sources (e.g. wind energy) increases, network operators start to
concern with the uncertainty of generation. However, when the
power output intermittent renewable sources is predicted,
the network operators can reduce the operational costs of the
network and the DG owners may go on the market. Thus, our
challenge with this work was to develop an algorithm which can
predict the active power output the aggregation of wind and
biomass energy at the primary distribution substation of a typical
distribution network. Wind and biomass energy plant are onto
the same distribution network but not necessarily onto the same
feeder. Platform: |
Size: 142336 |
Author:elshan.j |
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Description: This paper propose a Firefly algorithm (FA) for
optimal placement and sizing of distributed generation (DG) in
radial distribution system to minimize the total real power losses
and to improve the voltage profile. FA is a metaheuristic
algorithm which is inspired by the flashing behavior of fireflies.
The primary purpose of firefly’s flash is to act as a signal system
to attract other fireflies. Metaheuristic algorithms are widely
recognized as one of the most practical approaches for hard
optimization problems. The most attractive feature of a
metaheuristic is that its application requires no special
knowledge on the optimization problem. In this paper, IEEE 33-
bus distribution test system is used to show the effectiveness of
the FA. Comparison with Shuffled Frog Leaping Algorithm
(SFLA) is also given. Platform: |
Size: 1024 |
Author:AMIR555 |
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Description: With the increasing penetration of renewable energies as distributed generation
(DG) in smart grid scheme, technical problems arise in both distribution and transmission
system level. Undesirable voltage is the main problem for connection of
DGs in distribution systems while excessive reactive power demand transmission
system is the major concern for Transmission System Operators.
The low power generation capacity of DER (Distributed Energy Resources) has
motivated the need for integration of different types of DERs and loads in the form
of micro-grid to enhance the power generation capacity, reliability and marketability
of dispersed type of micro-sources [12, 13]. Current harmonics and Reactive power
consumption are the two power quality issues that are addressed in this thesis-With the increasing penetration of renewable energies as distributed generation
(DG) in smart grid scheme, technical problems arise in both distribution and transmission
system level. Undesirable voltage is the main problem for connection of
DGs in distribution systems while excessive reactive power demand transmission
system is the major concern for Transmission System Operators.
The low power generation capacity of DER (Distributed Energy Resources) has
motivated the need for integration of different types of DERs and loads in the form
of micro-grid to enhance the power generation capacity, reliability and marketability
of dispersed type of micro-sources [12, 13]. Current harmonics and Reactive power
consumption are the two power quality issues that are addressed in this thesis Platform: |
Size: 9563136 |
Author:live |
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Description: Power flow in distribution system is systematically different with transmission systems.
Because in distribution system the ration of R/X is high and the conventional power flow
methods such as Newton-Raphson cannot always be used. In this regard, Backward/Forward
(BW/FW) sweep algorithm has been developed for power flow in distribution system. In this
paper, the proposed method is uated with consideration of distributed generation (DG).-Power flow in distribution system is systematically different with transmission systems.
Because in distribution system the ration of R/X is high and the conventional power flow
methods such as Newton-Raphson cannot always be used. In this regard, Backward/Forward
(BW/FW) sweep algorithm has been developed for power flow in distribution system. In this
paper, the proposed method is uated with consideration of distributed generation (DG). Platform: |
Size: 66560 |
Author:saeed |
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Description: a powerful approach to find the
optimal size and location of distributed generation units in a
distribution system using Genetic Optimization algorithm (GA).
The total active and reactive power losses are minimized and
voltage profile is improved. GA fitness function is introduced
including the active power losses, reactive power losses and the
cumulative voltage deviation variables with selecting weight of
each variable. GA fitness function is subjected to Voltage
Constraints, active and reactive power losses constraints Platform: |
Size: 2048 |
Author:saeed |
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Description: 考虑分布式电源的配电网电压控制新方法。针对含分布式电源的配电网电压越限问题，提出了一种基于灵敏度分析进行综合调节分布式电源出力和投切电容器组的电压控制新方法。当配电网出现节点电压越限，通过计算各个节点的注入无功功率对电压的灵敏度，以系统节点电压偏移最小为目标函数，采用和声算法，综合确定调节分布式电源出力大小和投切电容器组大小，并对分布式电源是否参与电压控制的控制效果和是否按电压灵敏度调节电压的控制效果进行了比较。-New Method of Voltage Control Considering Distribution Network Containing Distributed Generation. Considering out of limit voltage in distribution network containing distributed generation(DG)，a new method of voltage control is proposed，which is based on sensitivity analysis and consists of comprehensive regulations of outputs of DGs and switching capacitor groups．When out of limit voltage appears，the sensitivity of voltages in each node caused by input reactive power is worked out，with minimum shifts of nodes in system selected to be an objective function and harmony search algorithm adopted as calculating method，then the magnitude of outputs of sources and switching groups is determined comprehensively．Also the performances of voltage control with and without DGs and regulations by voltage sensitivity are compared．This paper deduced sensitivity matrix in cartesian coordinates，and employed IEEE-33 bus system to verify the control strategy，and verified its correctness and effectiveness Platform: |
Size: 912384 |
Author:杨帆 |
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Description: 含分布式发电的配电网有功-无功综合优化，分布式电源包含风机光伏和无功补偿装置-Active/reactive power integrated optimization in distribution networks
with distributed generation Platform: |
Size: 65536 |
Author:邓振立 |
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Description: 含分布式发电的配电网无功优化论文源程序，里面含有风机和光伏的预测模型程序。-Active/reactive power integrated optimization in distribution networks
with distributed generation Platform: |
Size: 66560 |
Author:邓振立 |
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Description: This paper proposes a Flexible D-STATCOM (Distribution STATIC Compensator) and its new
controller system, in IEEE 13-bus industrial distribution system, that be able to both mitigate all types of series
faults (open-circuit or open conductor faults) and operate as a Distributed Generation (DG), when it supplies power
to sensitive loads while the main utility source is disconnected (i.e. it is under islanded operating condition). Thus
D-STATCOM operates same as a Flexible DG (FDG) and consequently, it is called Flexible D-STATCOM (FDSTATCOM). In this paper, the 12-pulse FD-STATCOM configuration with IGBT is designed and the graphic based
models of the FD-STATCOM are developed using the PSCAD/EMTDC electromagnetic transient simulation
program. The reliability and robustness of the control schemes in the system response to the voltage disturbances
caused by series faults and islanded operating condition are obviously proved in the simulation results. Platform: |
Size: 117760 |
Author:phdscolar11
|
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Description: This paper presents a new method to solve the network reconfiguration problem in the presence of distributed generation (DG) with an objective of minimizing real power loss and improving voltage profile in distribution system. A meta heuristic Harmony Search Algorithm (HSA) is used to simultaneously reconfigure and identify the optimal locations for installation of DG units in a distribution network. Sensitivity analysis is used to identify optimal locations for installation of DG units. Different scenarios of DG placement and reconfiguration of network are considered to study the performance of the proposed method. The constraints of voltage and branch current carrying capacity are included in the uation of the objective function. The method has been tested on 33-bus and 69-bus radial distribution systems at three different load levels to demonstrate the performance and effectiveness of the proposed method. The results obtained are encouraging. (2014-11-17 Platform: |
Size: 58368 |
Author:salameh |
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Search - power distribution with distributed generation