Results 11 to 20 of about 1,270,734 (264)

Power-Imbalance Allocation Control of Power Systems-Secondary Frequency Control [PDF]

Automatica, 2018
The traditional secondary frequency control of power systems restores nominal frequency by steering Area Control Errors (ACEs) to zero. Existing methods are a form of integral control with the characteristic that large control gain coefficients introduce an overshoot and small ones result in a slow convergence to a steady state.
Xi, Kaihua, Dubbeldam, Johan L. A., Lin, Hai Xiang, van Schuppen, Jan H.   +3 more
openaire   +3 more sources

Analysis of Subsynchronous Torsional of Wind–Thermal Bundled System Transmitted via HVDC Based on Signal Injection Method

Energies, 2021
With the development of large-scale new energy, the wind–thermal bundled system transmitted via high-voltage direct current (HVDC) has become the main method to solve the problem of wind power consumption.
Junxi Wang, Qi Jia, Gangui Yan, Kan Liu, Dan Wang   +4 more
doaj   +1 more source

Operational reliability assessment considering independency between wind power ramps and frequency sensitive loads [PDF]

E3S Web of Conferences, 2021
With the increasing wind power penetration, power system frequency is more vulnerable especially when gust wind periods. Frequency control is used to restore system frequency back to the rated value.
Xiao Xiaolong, Gao Qingxu, Han Xiaoqing, Liang Dingkang   +3 more
doaj   +1 more source

A comprehensive design method of an active electronic current transformer for stable energy harvesting from power lines

IET Power Electronics, 2023
The real‐time monitoring technology of power line is an important guarantee for the digitization and intelligence of the modern power system. Traditional current transformers cannot provide continuous and stable energy when the power line current ...
Yifan Wang, Chunguang Ren, Jiansheng Kong, Baifu Zhang, Lei Wang, Xiaoqing Han, Yu Yang   +6 more
doaj   +1 more source

Bayesian Network Based Imprecise Probability Estimation Method for Wind Power Ramp Events

Journal of Modern Power Systems and Clean Energy, 2021
Although wind power ramp events (WPREs) are relatively scarce, they can inevitably deteriorate the stability of power system operation and bring risks to the trading of electricity market.
Yuanchun Zhao, Wenli Zhu, Ming Yang, Mengxia Wang   +3 more
doaj   +1 more source

Design and Implementation of PI and PID Controller for symmetrical multilevel boost Converter [PDF]

EPJ Web of Conferences
In this research, we propose developing and executing PID and PI controllers for a symmetrical multilevel boost converter in Matlab/Simulink. The symmetrical multilevel converter is powered by a 15 V DC generator with a 50 kHz switching frequency ...
El Haji Ikram, Mustapha Kchikach, Elhasnaoui Abdnnebi, Sahbani Sanaa   +3 more
doaj   +1 more source

Optimizing Method for Key Parameters of Under-frequency Load Shedding for Power System Penetrated with Hydropower

Zhongguo dianli, 2020
Under-frequency load shedding is an important part of the last defense line for power grid. However, the under-frequency load shedding device is prone to overcutting when large power shortage disturbance occurs in the grid system with high penetration of
Xiaojie PAN, Maosen FAN, Wenchao ZHANG, Pengwang LI, Liwei ZHANG   +4 more
doaj   +1 more source

Robust and dynamic transactive energy system using Tsypkin–Polyak theorem

IET Smart Grid, 2018
In this study, a robust and dynamic transactive energy system in smart grid (SG) environment is proposed based on the Tsypkin–Polyak theorem. A key factor of the proposed system is to consider the uncertainties in electrical grid parameters.
Mohammad Rayati, Sanaz Amirzadeh Goghari, Zahra Nasiri Gheidari, Ali Mohammad Ranjbar   +3 more
doaj   +1 more source

Storage-Transmission Joint Planning Method to Deal with Insufficient Flexibility and Transmission Congestion

Frontiers in Energy Research, 2021
The insufficient power system flexibility and transmission congestion are two fundamental reasons for wind power curtailment. As the scale of the wind power in the power system is growing rapidly, the two factors of wind power curtailment events coexist ...
Xiuyu Yang, Xiuyu Yang, Guofeng Chai, Xueyuan Liu, Minghong Xu, Qi Guo   +5 more
doaj   +1 more source

Novel protection method for VSC-HVDC transmission lines

The Journal of Engineering, 2019
The large shunt capacitances on both sides of VSC-HVDC transmission line will block and reflect the travelling waves when a fault occurs on DC cable lines.
Lingtong Jiang, Qing Chen, Lei Wang, Pu Zhao, Yu Zeng, Wudi Huang   +5 more
doaj   +1 more source