scholarly journals Analysis on the coupling characteristics of frequency stability and voltage stability in weak connected power grid with high ratio of clean energy

2022 ◽  
Vol 8 ◽  
pp. 1432-1437
Author(s):  
Qi Wang ◽  
Ming Li ◽  
Pandeng Luo ◽  
Heng Wang ◽  
Pengpeng Kang ◽  
...  
Keyword(s):  
Voltage Stability ◽  
Power Grid ◽  
Clean Energy ◽  
Frequency Stability ◽  
High Ratio ◽  
Coupling Characteristics

scholarly journals Research on optimization method of primary frequency modulation capability based on different ratios of hydropower

2020 ◽  
Vol 185 ◽  
pp. 01031
Author(s):  
Xiaojie Pan ◽  
Maosen Fan ◽  
Wenchao Zhang ◽  
Liwei Zhang ◽  
Xing Chen
Keyword(s):  
Transmission Lines ◽  
Frequency Modulation ◽  
Power Grid ◽  
Thermal Power ◽  
Optimization Method ◽  
Frequency Stability ◽  
High Ratio ◽  
Long Distance ◽  
Primary Frequency ◽  
Grid Operation

With the continuous development of China’s cross-regional interconnected power grid, large- capacity and long-distance transmission have become an important feature of China’s power grid. As the transmission capacity of single-return transmission lines continues to increase, the risk of frequency fluctuations increases, making grid operation scheduling more concerned with the performance of the unit’s primary frequency modulation. This paper tests the frequency stability of a power system under different scenarios, in which the proportion of water and thermal power in the system is different. The results represent that a system with a large proportion of hydropower has poorer frequency stability. This paper offers a method of primary frequency modulation, which proposed to improve the frequency stability of the system by increasing the time delay of the hydropower unit’s governor. The results of simulation prove that this method is an available solution to solve the problem of poor system frequency stability when a system has a high ratio of hydropower.

scholarly journals Voltage Stability of Power Systems with Renewable-Energy Inverter-Based Generators: A Review

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 115
Author(s):  
Nasser Hosseinzadeh ◽  
Asma Aziz ◽  
Apel Mahmud ◽  
Ameen Gargoom ◽  
Mahbub Rabbani
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Voltage Stability ◽  
Reactive Power ◽  
Power Grid ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
System Stability ◽  
Special Issue ◽  
Synchronous Generators

The main purpose of developing microgrids (MGs) is to facilitate the integration of renewable energy sources (RESs) into the power grid. RESs are normally connected to the grid via power electronic inverters. As various types of RESs are increasingly being connected to the electrical power grid, power systems of the near future will have more inverter-based generators (IBGs) instead of synchronous machines. Since IBGs have significant differences in their characteristics compared to synchronous generators (SGs), particularly concerning their inertia and capability to provide reactive power, their impacts on the system dynamics are different compared to SGs. In particular, system stability analysis will require new approaches. As such, research is currently being conducted on the stability of power systems with the inclusion of IBGs. This review article is intended to be a preface to the Special Issue on Voltage Stability of Microgrids in Power Systems. It presents a comprehensive review of the literature on voltage stability of power systems with a relatively high percentage of IBGs in the generation mix of the system. As the research is developing rapidly in this field, it is understood that by the time that this article is published, and further in the future, there will be many more new developments in this area. Certainly, other articles in this special issue will highlight some other important aspects of the voltage stability of microgrids.

Analysis of Power Grid Voltage Stability with High Penetration of Solar PV Systems

2021 ◽  
pp. 1-1
Author(s):  
Sharmin Rahman ◽  
Sajeeb Saha ◽  
Shama Naz Islam ◽  
M Arif ◽  
Mehdi Mosadeghy ◽  
...  
Keyword(s):  
Voltage Stability ◽  
Power Grid ◽  
Solar Pv ◽  
Grid Voltage ◽  
Pv Systems ◽  
High Penetration

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.

Reactive Power Loss Index for Identification of Weak Nodes and Reactive Compensation Analysis to Improve Steady State Voltage Stability

2020 ◽  
pp. 177-237
Author(s):  
Tukaram Moger ◽  
Thukaram Dhadbanjan
Keyword(s):  
Steady State ◽  
Power Loss ◽  
Voltage Stability ◽  
Reactive Power ◽  
Power Grid ◽  
Southern Region ◽  
Equivalent System ◽  
Reactive Compensation ◽  
Simulation Results ◽  
Loss Index

This chapter presents a new reactive power loss index for identification of weak buses in the system. This index can be used for identification of weak buses in the systems. The new reactive power loss index is illustrated on sample 5-bus system, and tested on sample 10-bus equivalent system and 72-bus equivalent system of Indian southern region power grid. The validation of the weak buses identification from the reactive power loss index with that from other existing methods in the literature is carried out to demonstrate the effectiveness of the index. Simulation results show that the identification of weak buses in the system from the new reactive power loss index is completely non-iterative, and thus requires minimal computational efforts as compared with other existing methods in the literature.

scholarly journals Power-Grid Dispatching Method Considering Heat-Power Coupling Characteristics of CHP Units

2020 ◽  
Vol 440 ◽  
pp. 032061
Author(s):  
Sensen Guan ◽  
Kun Wang ◽  
E Zhijun ◽  
Qingbo Hu ◽  
Shan Wang ◽  
...  
Keyword(s):  
Power Grid ◽  
Heat Power ◽  
Power Coupling ◽  
Coupling Characteristics
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