scholarly journals Scheduling Strategy Optimization and Security Protection Technology in Smart Distribution Network

2022 ◽  
Vol 2146 (1) ◽  
pp. 012020
Author(s):  
Qing Ge ◽  
Ran Che ◽  
Ruiyuan Fu ◽  
Ling Zeng ◽  
Chao Lu
Keyword(s):  
Economic Development ◽  
Power System ◽  
Power Supply ◽  
Performance Test ◽  
Distribution Network ◽  
Sustainable Construction ◽  
Optimization Strategy ◽  
Social And Economic Development ◽  
Protection Technology ◽  
Smart Distribution Network

Abstract In the power system, distribution network is a very important link, and its operation quality and power supply reliability have a great impact on the whole social and economic development. Firstly, this paper analyzes the structure, function and characteristics of intelligent distribution network. Then it introduces the research status of optimization strategy based on genetic algorithm and its security protection technology, as well as the relevant basic theoretical knowledge. Then, aiming at the existing problems, the security protection system is designed for the power grid. Finally, through the performance test of the system, it is verified that the method is efficient and practical, and can effectively improve the security and stability of the power system, promote the further acceleration of China’s sustainable construction process, improve the benefit level of power supply enterprises, and achieve the goal of social and economic development.

The Optimization Strategy of Loop Closing Operation in Self-Healing Distribution Network

2014 ◽  
Vol 519-520 ◽  
pp. 1375-1378
Author(s):  
Shi Dong Zhang ◽  
Li Sheng Li ◽  
Hong Lin Zhao ◽  
Xing Quan Ji
Keyword(s):  
Power Supply ◽  
Distribution Network ◽  
Mathematic Model ◽  
Self Healing ◽  
Optimization Strategy ◽  
Smart Distribution Network ◽  
The Stability ◽  
Operation Risk ◽  
Loop Closing ◽  
Effective Distribution

Self-healing is the most important feature of smart distribution network. This paper analyzes the mathematic model and the optimization scenario of the loop closing power supply switching operation in the self-healing frame. An effective distribution network loop closing optimization strategy is proposed, which is significant for reducing loop closing operation risk and increasing the stability of power supply.

scholarly journals Research on Peak Load Shifting Operation Strategy of Small-Scale Mobile Energy Storage Device in Distribution Network

2021 ◽  
Vol 2087 (1) ◽  
pp. 012007
Author(s):  
JianMing Chen ◽  
Ruijin Dai ◽  
Yilin He ◽  
Tiancheng Chen ◽  
Weimin Chen
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Power Supply ◽  
Distribution Network ◽  
Peak Load ◽  
Storage Device ◽  
Utilization Rate ◽  
Small Scale ◽  
Load Shifting ◽  
Threshold Control

Abstract This paper studied two methods of using energy storage (ES) to achieve peak load shifting by charging and discharging. In different distribution network transformer power supply areas, the time of peak and valley of load is not identical. The small-scale mobile ES device was commanded to deliver energy at the peak of the power supply area to reduce the supply pressure of the power system by central control units (CCU), and while the load is at the valley, the ES charges and absorbs power to enhance the utilization rate of energy in the system. Currently, the control methods of peak load shifting for ES device (Constant Power Control and Threshold Control) were studied, and the operation results in power system were analyzed with their involvement, which provided the substantial supports for CCU to dispatch. Ultimately, the results showed the methods proposed were feasible and effective by simulation.

scholarly journals Adaptive Current Protection Technology for Distribution Network with Distributed Power Sources Based on Local Information

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Shijie Cui ◽  
Peng Zeng ◽  
Zhongfeng Wang ◽  
Yue Zuo
Keyword(s):  
Power Supply ◽  
Power Distribution ◽  
Negative Impact ◽  
Short Circuit ◽  
Distribution Network ◽  
Local Information ◽  
Power Supplies ◽  
Power Sources ◽  
Distributed Power ◽  
Protection Technology

Because the distributed power supply is connected to the distribution network, its structure has also changed the original traditional method. The original single power supply method was originally used. The network provided is a radial network and it is connected to the distributed power supply. Later, it became a structure with small- and medium-sized power supplies inside, and its network power supply became dual or multiple power supplies. Such a structural change affected the coordination of power distribution protection devices, which would impose current on the distribution network. Protection has a negative impact. This paper aims to study the adaptive current protection technology of distribution network with distributed power based on local information. On the basis of analyzing the characteristics of distributed power, the classification of distributed power, and the operation mode of distributed power, according to the access of IIDG, as well as different influences of relay protection of distribution network, an improved protection scheme with adaptive current quick-break protection as the main protection is proposed, so that different fault characteristics of the distribution network have different setting values, and then simulation experiments are carried out on this scheme. The experimental results show that the setting value of three-phase short-circuit fault proposed in this paper can well protect the protection range, which is larger than the traditional protection setting and self-adaptive setting.

Study on the Practical Connection Mode of Microgrid Adapting to Dual Power Supply

2014 ◽  
Vol 541-542 ◽  
pp. 875-879
Author(s):  
Bin Yang ◽  
Zhe Cao ◽  
Hai Long Bao ◽  
Zhi Qiang Yuan
Keyword(s):  
Distributed Generation ◽  
Power Supply ◽  
Distribution Network ◽  
Operating Modes ◽  
Smart Distribution Network ◽  
Dual Power

Microgrid is one of the most important contents of smart distribution network, and also the most effective way to converting the distributed generation into full efficiency. The connection mode of microgrid has to suite for the traditional distribution network, and also has its own characteristics. This paper discusses the principles of choosing the connection mode for microgrid, analyzes three connection modes meeting the requirements of dual power supply, and puts forwards suitable connection modes and operating modes for Chenjiazhen microgrid.

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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