scholarly journals Research of Power Distribution System Dynamic Simulation Based on Grid’s Harmonic Current

2021 ◽  
Author(s):  
Wei Qin ◽  
Tiansong Gu ◽  
Hongliang Li
Keyword(s):  
Dynamic Model ◽  
Power Distribution ◽  
Distribution System ◽  
Harmonic Wave ◽  
Power Grid ◽  
Stable Operation ◽  
Harmonic Suppression ◽  
Parallel Operation ◽  
Harmonic Current ◽  
Main Components

Harmonic current in power grid will cause extra power consumption of electrical equipment and affect the stable operation of power grid. Based on the dynamic model experiment system of 10kV distribution network, a working platform for parallel operation of charging pile was built, which studied the harmonic current components and analyzed the simulation waveform. The results show that with the increase of number of charging piles, the content of harmonic current will decrease correspondingly, the main components are low frequency odd harmonics; When 16 charging piles are connected in parallel, three harmonics are the main components; the waveform of the simulation calculation curve and the actual measurement curve are basically consistent, and the current amplitude of each frequency harmonic wave is basically the same , so it is proved that the dynamic model test platform is reasonable and feasible to test grid’s harmonic current. The dynamic model can provide technical support for harmonic suppression research.

AN APPLICATION OF THE HIGHLY OPTIMIZED TOLERANCE MODEL TO ELECTRICAL BLACKOUTS

2003 ◽  
Vol 13 (01) ◽  
pp. 237-242 ◽  
Author(s):  
M. D. STUBNA ◽  
J. FOWLER
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Power Grid ◽  
Data Sets ◽  
Grid Data ◽  
Uncertain Environments ◽  
Power Distribution System ◽  
Resource Misallocation ◽  
Optimal Resource ◽  
Number Of Customers

The recently proposed Highly Optimized Tolerance (H.O.T.) model [Carlson & Doyle, 1999, 2000], which aims to describe the statistics of robust complex systems in uncertain environments, is compared with data from the Western United States (W.S.C.C.) power distribution system. We use for comparison a 15-year record of all power outages occurring on the grid, measured in the size of megawatts lost and the number of customers without service. In applying the model to the power grid data, we find that the problem of determining how the resources in the system scale with event size is nontrivial given the assumptions of the model and the information about how the power grid actually operates. Further, we observe that the model agrees closely with the W.S.C.C. data for the megawatts but not the customers, and consequently propose that the assumption in the model of optimal resource distribution is not valid in general when more than one measure of event size is used. A modified H.O.T. model which allows for resource misallocation is introduced and we find that this model can be made to fit both data sets reasonably well.

scholarly journals Analysis of Output Characteristics of Typical Distributed Wind Power

2019 ◽  
Vol 79 ◽  
pp. 03017
Author(s):  
Mingyu Dong ◽  
Dezhi Li ◽  
Fenkai Chen ◽  
Meiyan Wang ◽  
Rongjun Chen ◽  
...  
Keyword(s):  
Wind Power ◽  
Power Output ◽  
Power Distribution ◽  
Large Scale ◽  
Power Grid ◽  
Stable Operation ◽  
Smart Power ◽  
Power Exchange ◽  
The Future ◽  
Output Characteristics

With the development of smart power distribution technology in the future, a large range of power supply load (such as distributed wind power generation) will appear on the power receiving end. When distributed wind power is connected to the power grid on a large scale, it will have a certain impact on the safe and stable operation of the power grid. However, if the wind power output characteristics can be analyzed and the wind power output is properly regulated, the one-way flow of power from the distribution network to the user side will be broken, so that the future "network-load" has dual interaction characteristics based on response and substantial power exchange.

scholarly journals Optimizing Smart Grid Operations from the Demand Side

AI Magazine ◽  
2021 ◽  
Vol 42 (2) ◽  
pp. 28-37
Author(s):  
Yongqing Zheng ◽  
Han Yu ◽  
Yuliang Shi ◽  
Kun Zhang ◽  
Shuai Zhen ◽  
...  
Keyword(s):  
Power Grid ◽  
Stable Operation ◽  
Demand Side ◽  
Power Outage ◽  
Fine Grained ◽  
Management Platform ◽  
Intelligent Decision ◽  
Main Components ◽  
Planning And Construction ◽  
Intelligent Decision Support

As demand for electricity grows in China, the existing power grid is coming under increasing pressure. Expansion of power generation and delivery capacities across the country requires years of planning and construction. In the meantime, to ensure safe operation of the power grid, it is important to coordinate and optimize the demand side usage. In this paper, we report on our experience deploying an artificial intelligence (AI)–empowered demand-side management platform – the Power Intelligent Decision Support (PIDS) platform – in Shandong Province, China. It consists of three main components: 1) short-term power consumption gap prediction, 2) fine-grained Demand Response (DR) with optimal power adjustment planning, and 3) Orderly Power Utilization (OPU) recommendations to ensure stable operation while minimizing power disruptions and improving fair treatment of participating companies. PIDS has been deployed since August 2018. It is helping over 400 companies optimize their power usage through DR, while dynamically managing the OPU process for around 10,000 companies. Compared to the previous system, power outage under PIDS due to forced shutdown has been reduced from 16% to 0.56%.

scholarly journals Measurement-based harmonic current modeling of mobile storage for power quality study in the distribution system

2017 ◽  
Vol 66 (4) ◽  
pp. 801-814 ◽  
Author(s):  
Christoph Wenge ◽  
Hui Guo ◽  
Christian Roehrig
Keyword(s):  
Power System ◽  
Power Quality ◽  
Power Distribution ◽  
Distribution System ◽  
Measurement Data ◽  
Load Flow ◽  
Harmonic Current ◽  
Current Harmonics ◽  
Power Distribution System ◽  
The Impact

Abstract Electric vehicles (EVs) can be utilized as mobile storages in a power system. The use of battery chargers can cause current harmonics in the supplied AC system. In order to analyze the impact of different EVs with regardto their number and their emission of current harmonics, a generic harmonic current model of EV types was built and implemented in the power system simulation tool PSS®NETOMAC. Based on the measurement data for different types of EVs three standardized harmonic EV models were developed and parametrized. Further, the identified harmonic models are used by the computation of load flow in a modeled, German power distribution system. As a benchmark, a case scenario was studied regarding a high market penetration of EVs in the year 2030 for Germany. The impact of the EV charging on the power distribution system was analyzed and evaluated with valid power quality standards.

scholarly journals Memetic Salp Swarm Algorithm-Based Frequency Regulation for Power System with Renewable Energy Integration

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Fang Zeng ◽  
Hongchun Shu
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Power Distribution ◽  
Power Grid ◽  
Frequency Regulation ◽  
Stable Operation ◽  
Energy Integration ◽  
Salp Swarm Algorithm ◽  
Intelligent Optimization Algorithms ◽  
Swarm Algorithm

As the penetration of renewable energy to power grid increases gradually, to ensure the safety and stable operation of power system, it is necessary for renewable energy to participate in the secondary frequency regulation of power system. Therefore, this paper proposes an optimal control model of renewable energy participating in the secondary frequency regulation to solve the dynamic power distribution problem. Besides, memetic salp swarm algorithm (MSSA) is used to solve this complex nonlinear optimization problem, so as to quickly obtain high-quality power distribution schemes under different power perturbations and maximize the dynamic response regulation performance of the entire regional power grid. Finally, based on the improved IEEE standard two-area model, the established model is verified and the performance of the applied algorithm is tested by comparing the traditional engineering allocation method and other intelligent optimization algorithms.

scholarly journals Design and implementation of feeder automation

2018 ◽  
Vol 175 ◽  
pp. 03021
Author(s):  
Liu Penghou
Keyword(s):  
Power Supply ◽  
Power Distribution ◽  
Power Grid ◽  
Operation Mode ◽  
Modern Society ◽  
Automation System ◽  
Stable Operation ◽  
Feeder Automation ◽  
Smart Power ◽  
Design And Implementation

With the development of national economy, the demand for electricity from all walks of life has been gradually increased. People also put forward higher requests to the reliability of power supply. Feeder automation can quickly cut off the faulty line to ensure the safe and stable operation of the line. Under the sustainable development of modern society, people attach a great importance to all aspects of smart power grid construction, which is also significant for the smart grid distribution work. To ensure the reliable and high-quality power supply environment, the scientific and reasonable design and planning of power distribution automation system shall pay attention to arranging power distribution, and the appropriate feeder automation operation mode shall be selected. Only in this way can we ensure that the power outage is short once a fault happening in power grid system. At the same time, the line loss rate can be reduced, the efficiency of power supply can be raised, and issues in power equipment investment can be effectively treated. This paper mainly discusses the design and implementation of feeder automation, puts forward some practical application measures, and provides reference for the stable operation of feeder automation.

scholarly journals Selective harmonic suppression strategy by SAPF in power distribution system

2017 ◽  
Vol 2017 (13) ◽  
pp. 1610-1613 ◽  
Author(s):  
Liu Cong ◽  
Dai Ke ◽  
Chen Xinwen ◽  
He Yuqing ◽  
Lu Pingjiang
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Harmonic Suppression ◽  
Power Distribution System ◽  
Suppression Strategy
Sign in / Sign up

Export Citation Format

Share Document