Security and Stability Problems Faced by the Transformation of Full Clean Energy in the Power Grid at the Transmission End and Countermeasures

2020 ◽  
Author(s):  
ZhenLin Ni ◽  
YanHe Li ◽  
Ling Dong ◽  
HongLi Zhang ◽  
FuSuo Liu ◽  
...  
Keyword(s):  
Power Grid ◽  
Clean Energy ◽  
Stability Problems

scholarly journals Evaluation method of clean power grid development mode

2021 ◽  
Vol 236 ◽  
pp. 02002
Author(s):  
Bingqi Jiao ◽  
Zhicheng Xu ◽  
Kuan Zheng ◽  
Xiaoqing Yan ◽  
Junshu Feng
Keyword(s):  
Evaluation Method ◽  
Power Grid ◽  
Clean Energy ◽  
Power Grids ◽  
Analysis Method ◽  
Development Mode ◽  
Grid Construction ◽  
Development Evaluation ◽  
Relative Change

In response to the climate change, it has been becoming the consensus of most countries in the world to accelerate the development of a high proportion of clean energy. The power grid is the core to support the development of a high proportion of clean energy, and the key is to accelerate the construction of clean power grids. This paper focuses on the main characteristics of clean power grid construction, and proposes a set of clean power grid development evaluation indicators including 5 first-level indicators and 19 second-level indicators and an analysis method based on radar charts. Taking China Power Grid as an example, this paper analyzes in detail the characteristics of the medium and long-term development mode of clean power grids and the relative change trends of specific indicators, and discusses the key links and potential problems that need attention in the development of clean power grids.

scholarly journals PV Benefits Assessment for PV-Powered Charging Stations for Electric Vehicles

2021 ◽  
Vol 11 (9) ◽  
pp. 4127
Author(s):  
Youssef Krim ◽  
Manuela Sechilariu ◽  
Fabrice Locment
Keyword(s):  
Power Grid ◽  
Weather Conditions ◽  
Clean Energy ◽  
Second Phase ◽  
Operating Modes ◽  
Charging Station ◽  
Grid Connection ◽  
Local Stakeholders ◽  
Lift Off ◽  
Charging Stations

Recently, the lift off point for the sales of electric vehicle (EV) was started with a significant increase. Therefore, convenient access to charging station infrastructure is required. The purpose of this work is to assess the role and benefits of photovoltaic (PV) for PV-powered charging infrastructures for EVs by a better energy management. This management is performed by a microgrid based on PV panels installed on roofs or car parking shades, EVs charging terminals, electrochemical stationary storage, and public grid connection. The aim is to define the economic aspects, feasibility and preliminary requirements for this system, in order to avoid overloading the power grid and guarantee a higher percentage of clean energy. The proposed methodology is presented through the modeling and development of a techno-economic tool for local stakeholders, allowing to manage and size EV charging stations, which is divided into three phases. The first phase informs local stakeholders on the necessary space and the maximum sizing as well as the generated cost to install a PV-powered charging station (PVCS). During the second phase, the total cost of the PVCS is adjusted according to the users’ budgets and needs. The third phase presents a detailed qualitative analysis of the user-defined configuration. In this phase, the main objective is to assess the performance of the PVCS, and then, to improve its sizing and its operating modes aiming at increasing the use of PV energy, while minimizing energy supplied by the power grid. In addition, it allows evaluating the PVCS performance by proposing an energy balance according to different charging scenarios (virtuous scenario, critical scenario, realistic scenario, and personalized scenario) and weather conditions. Moreover, this tool is reproducible in peri-urban area since it is able to handle any location.

scholarly journals Frequency Modulation Method and System of Photovoltaic Virtual Synchronous Generator Based on Computer Technology

2021 ◽  
Vol 2143 (1) ◽  
pp. 012028
Author(s):  
Jiangfeng Zhang ◽  
Ye Su ◽  
Keke Zheng ◽  
Liyun Hua
Keyword(s):  
Power Generation ◽  
Power Grid ◽  
Synchronous Generator ◽  
Clean Energy ◽  
Voltage Regulation ◽  
Frequency Regulation ◽  
Important Research ◽  
Photovoltaic Power ◽  
Primary Frequency ◽  
Virtual Synchronous Generator

Abstract With people’s attention to environmental protection, clean energy has become an important research and development direction. Among them, photovoltaic power generation has many advantages, such as simple process, no fuel consumption, no noise, no pollution and so on. The power grid capacity is becoming larger and larger, and has a great impact on the environment. Therefore, the grid connection of photovoltaic power generation will cause major problems for the planning, operation and dispatching of power grid. Virtual synchronous generator (hereinafter referred to as VSG) technology can simulate the inertia, primary frequency regulation and voltage regulation characteristics of synchronous generator, which has become an important way to improve the dynamic frequency response ability of the system. Therefore, VSG technology has become an important research technology of photovoltaic grid connected system, among which FM method will also become an important research direction. Firstly, this paper analyzes the VSG algorithm and its basic characteristics. Finally, this paper analyzes the control scheme of overall primary frequency regulation of photovoltaic power station (hereinafter referred to as PPS).

scholarly journals Reliability Assessment of the Wind-solar-battery Storage System Based on Optimized Configuration

2018 ◽  
Vol 17 ◽  
pp. 01018
Author(s):  
Yuan Wang ◽  
Haojie Liu
Keyword(s):  
Wind Farm ◽  
Power Grid ◽  
Storage System ◽  
Thermal Power ◽  
Clean Energy ◽  
Optimal Scheduling ◽  
Battery Storage ◽  
Optimal Dispatch ◽  
New Energy ◽  
The Impact

In order to analyze the impact of new energy power generation on the power grid system, the reliability evaluation of the wind-solarbattery storage system is carried out. Proposed to wind power, solar, thermal power, different sodium-sulfur battery storage combined optimal dispatch of scenery. The shortest variance of the net load and the maximum variance of the wind storage system are taken as the objective function. The short-term optimal scheduling model of the power grid is established based on the characteristics of the wind farm, the characteristics of the solar field and the electric field of the sodium flow battery. Multi-objective particle swarm optimization The algorithm solves the model and obtains the output power of wind, light, storage and fire under different new energy strategies. The reliability is evaluated by Monte-Carlo method. Taking the IEEE-30 node as an example, it is proved that the proposed model is reasonable and the new energy can improve the clean energy consumption ability and minimize the impact on the power grid under the optimal scheduling strategy.

Research on Battery Management in Multi-Power Grid Generation System

2012 ◽  
Vol 479-481 ◽  
pp. 1982-1985
Author(s):  
Chun Wang ◽  
Zu Hua Fang ◽  
Ting Ting Hong ◽  
Ying Sun ◽  
Hong Bing Xu ◽  
...  
Keyword(s):  
Energy Source ◽  
Energy Storage ◽  
Power Grid ◽  
Storage System ◽  
Grid Generation ◽  
Clean Energy ◽  
Energy Storage System ◽  
Battery Management ◽  
Generation System ◽  
Clean Energy Source

The multi-power grid generation system will be the main technology in the future use of energy. It can provide high quality uninterruptible power supply for users through the grid-connected system of photovoltaic system, wind power, batteries, and gas-fired power and other clean energy source. Due to the instability of energy source system and the special conditions of the energy storage system, an important factor of affecting the multi-power grid generation system is the energy storage system. So, this paper aims to design an optimized battery management system (BMS). It not only can take advantage of solar, wind, gas and other clean energy source but also have an efficient management and maintenance system to batteries, which can reduce the costs of battery maintenance, and improve the battery packs' efficiency. This design has outstanding advantages over low-medium power applications.

scholarly journals Influence of Hydro Turbine Supervision and Control System on Frequency Characteristics of High Proportion Hydropower System

2021 ◽  
Vol 261 ◽  
pp. 01036
Author(s):  
Guanhong Wang ◽  
Zhichen Geng ◽  
Dongping Ai ◽  
Wei Wei ◽  
Ying Li ◽  
...  
Keyword(s):  
Power Control ◽  
Monitoring System ◽  
Power Grid ◽  
Clean Energy ◽  
Active Power ◽  
Frequency Regulation ◽  
Regulation System ◽  
Stability Calculation ◽  
Active Power Control ◽  
System Frequency

With the construction of interconnected power grid and the rapid development of clean energy, the frequency problem of power system is becoming increasingly prominent. The problem of ultra-low frequency oscillation affects the stability of system frequency. In order to analyze the frequency regulation characteristics of the system, it is necessary to study the local active power control link and stability calculation model of the hydropower plant computer monitoring system. In this paper, the influence of the local active power control link of the monitoring system on the system frequency small signal stability is studied, and the model is built in the simulation program. Through the simulation of 4-machine-2 regional power grid, the influence characteristics of local active power control on frequency dynamic damping level are verified. In the example of large power grid, the coordination between the local active power control of the monitoring system and the speed regulation system of hydropower units is comprehensively considered, the suggestion of coordination of multi-level frequency modulation resources to system frequency regulation is put forward.

Clean Energy Transition Evolution of Power Grid Based on System Dynamics

2021 ◽  
Author(s):  
Guangbo Peng ◽  
Yue Xiang ◽  
Jianping Yang ◽  
Huichuan Liu ◽  
Bingcheng Cen
Keyword(s):  
System Dynamics ◽  
Power Grid ◽  
Energy Transition ◽  
Clean Energy ◽  
Grid Based

scholarly journals Design and analysis of distributed photo-voltaic power station

2018 ◽  
Vol 175 ◽  
pp. 03002
Author(s):  
Feng Peilei ◽  
Wu Hesong ◽  
Zhang Mingsheng ◽  
Wan Wenkui
Keyword(s):  
Solar Cell ◽  
Structural Characteristics ◽  
Power Grid ◽  
Clean Energy ◽  
Power Station ◽  
Public Power ◽  
Sewage Plant ◽  
Power Load ◽  
Three Phase ◽  
Photo Voltaic

After the location of the power station is determined, the construction scale of the solar grid connected photo-voltaic power station is mainly with the terrain conditions and the conditions of land use.The selection of solar cell components and installation methods, access to the power grid and other factors are related.In this paper, according to the existing construction conditions in the sewage plant, the area suitable for the layout of the solar cell array is selected.Accordmg to the structural characteristics of existing structures and the prediction of the power load in the sewage plant, the installed capacity of the plan is 4.9218MWp. A 10kV installed switch-gear station is built, and the 1 10kV outlet is connected to the total distribution room power station. The project is completed at once.Solar energy is converted to DC power through photo-voltaic array composed of PV modules. After three phase inverter (DC-AC) is converted to three-phase alternating current, it is converted to AC power that meets the requirements of public power grid and directly connected to the public power grid through the step-up transformer.The construction and operation of photo-voltaic power stations will not cause pollution to the environment, and can also provide some clean energy, which can reduce the use of fossil fuels such as coal.

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