Reliability Evaluation of Mid-Voltage DC Distribution Network with Multiple Topologies

2014 ◽  
Vol 666 ◽  
pp. 112-118 ◽  
Author(s):  
Jia Si Zeng ◽  
Yi Bo Gao ◽  
Feng Yang ◽  
Xi Dong Xu ◽  
Peng Qiu ◽  
...  
Keyword(s):  
Power Electronics ◽  
Sequential Monte Carlo ◽  
Reactive Power ◽  
Transmission Loss ◽  
Distribution Network ◽  
Reliability Evaluation ◽  
Power Electronic ◽  
Electronic Components ◽  
Reliability Models ◽  
Dc Distribution

With the development of power electronics, DC distribution network has advantages in power supplying for DC loads, saving transmission loss of reactive power and improving power quality, when compared with traditional AC distribution network. Since DC distribution network has several multiple topologies, lots of power electronic components and DGs, the traditional reliability evaluation methods aren’t applicable any more. Hence, the reliability models of power electronics and DGs are built in this paper, and a hybrid method combining minimum-cut with non-sequential Monte Carlo is presented. Moreover, three topologies of mid-voltage DC distribution network are designed based on IEEE RBTS bus6, by which the feasibility of the method is validated. Results show that two-terminal network is more reliable than radial and looped network.

scholarly journals Two-Stage Stochastic Programming Scheduling Model for Hybrid AC/DC Distribution Network Considering Converters and Energy Storage System

2019 ◽  
Vol 10 (1) ◽  
pp. 181
Author(s):  
Peng Kang ◽  
Wei Guo ◽  
Weigang Huang ◽  
Zejing Qiu ◽  
Meng Yu ◽  
...  
Keyword(s):  
Wind Power ◽  
Reactive Power ◽  
Distribution Network ◽  
Stochastic Scheduling ◽  
Second Order ◽  
Mixed Integer ◽  
Two Stage ◽  
Dc Distribution ◽  
Scheduling Model ◽  
Second Order Cone

The development of DC distribution network technology has provided a more efficient way for renewable energy accommodation and flexible power supply. A two-stage stochastic scheduling model for the hybrid AC/DC distribution network is proposed to study the active-reactive power coordinated optimal dispatch. In this framework, the wind power scenario set is utilized to deal with its uncertainty in real time, which is integrated into the decision-making process at the first stage. The charging/discharging power of ESSs and the transferred active/reactive power by VSCs can be adjusted when wind power uncertainty is observed at the second stage. Moreover, the proposed model is transformed into a mixed integer second-order cone programming optimization problem by linearization and second-order cone relaxation techniques to solve. Finally, case studies are implemented on the modified IEEE 33-node AC/DC distribution system and the simulation results demonstrate the effectiveness of the proposed stochastic scheduling model and solving method.

scholarly journals Investigation of reliability assessement in power electronics circuits using machine learning

2021 ◽  
Vol 12 (1) ◽  
pp. 558
Author(s):  
Soumya Rani Mestha ◽  
Pinto Pius A.J
Keyword(s):  
Machine Learning ◽  
Power Electronics ◽  
New Technologies ◽  
Remaining Useful Life ◽  
Power Electronic ◽  
Electronic Components ◽  
Recent Advances ◽  
Useful Life ◽  
Comprehensive Study

<p>Recent advances in power electronics (PE) and machine learning (ML) have prompted the technologists to adapt these new technologies to improve the reliability of PE systems. During the process, a lot of investigations on the performance and reliability of PE systems is carried out. The intention of this paper is to present a comprehensive study of advances in the field of reliability of PE systems using machine learning. Recent publications in this regard are analysed and findings are tabulated. In addition to this, literatures published in the prediction of remaining useful life (RUL) of power electronic components is discussed with emphasis on its limitations.</p>

A Combined AC+DC Distribution Network Interconnected with Renewable Energy

2014 ◽  
Vol 960-961 ◽  
pp. 676-679
Author(s):  
Dong Xin Hao ◽  
Li Zhang ◽  
Meng Qi Liu ◽  
Pan Ting Dong ◽  
Hao Wu
Keyword(s):  
Renewable Energy ◽  
Reactive Power ◽  
Voltage Drop ◽  
Electrical Power ◽  
Distribution Network ◽  
Transient State ◽  
Transient Effects ◽  
Line Voltage ◽  
Dc Power ◽  
Dc Distribution

The combined AC+DC distribution network in this study provides a coupling and decoupling strategy of renewable energy in DC mode by using zig-zag transformer, which makes each line transmit AC electrical power and DC power simultaneously. The proposed scheme is digitally simulated with the help of Simulink software package. Simulation results indicate lower line voltage drop and less active and reactive power loss in steady state; almost similar or even better transient effects in transient state, which demonstrates the feasibility of combined AC+DC distribution network of single line interconnected with renewable energy.

scholarly journals Power Management of AC/DC Hybrid Distribution Network With Multi-Port PET Considering Reliability of Power Supply System

2021 ◽  
Vol 9 ◽  
Author(s):  
Xinxing Xu ◽  
Wentao Huang ◽  
Yan Hu ◽  
Nengling Tai ◽  
Yaming Ji ◽  
...  
Keyword(s):  
Power System ◽  
Power Electronics ◽  
Power Supply ◽  
Sequential Monte Carlo ◽  
High Efficiency ◽  
Distribution Network ◽  
Control Mode ◽  
Automation System ◽  
Hybrid Power System ◽  
Hybrid Power

In the current distribution network, photovoltaic, wind power, energy storage, and other distributed energy are widely connected, and the proportion of generalized DC load is rapidly increasing. With the development of power electronics technology, using multi-port power electronic transformer (PET) to achieve high-efficiency access of large-capacity AC/DC source and load is the current research hotspot, and AC / DC hybrid power supply is inevitable. The introduction of a large number of power electronics and the flexible coordinated control and complementary fault-tolerant advantages of PET bring challenges to the operation and maintenance management of the AC/DC hybrid power system. In this paper, the structure of the AC/DC hybrid power system with the multi-port PET cluster is introduced. Based on the idea of hierarchical and partitioned control, a three-layer and multi-time scale control mode of integrated automation system, PET cluster and PET controller is proposed; Aiming at the problem of reliability evaluation, a sequential Monte Carlo simulation method is proposed to simulate the AC/DC hybrid power system with the multi-port PET cluster. The influence of multi-port PET parallel cluster mode and port capacity limitation on the reliability of the power system is analyzed, and the effectiveness of the model and algorithm is verified. Finally, an example is given to verify that the proposed structure is conducive to improving the utilization level of renewable energy in the distribution network.

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