Results 11 to 20 of about 7,034,927 (299)

Power Upgrading Of Transmission Line By Combining Ac-Dc Transmission

, 2016
Long extra high voltage (EHV) ac lines cannot be loaded to their thermal limits in order to keep sufficient margin against transient instability. With the scheme proposed in this paper it is possible to load these lines very close to their thermal limits. The conductors are allowed to carry usual ac along with dc superimposed on it. The added dc power
Kiran Soni, Dr. Dharmendra singh, Dr. sushil kumar   +2 more
openaire   +3 more sources

Research on Power Transmission Capacity of Transmission Section for Grid-Forming Renewable Energy via AC/DC Parallel Transmission System Considering Synchronization and Frequency Stability Constraints

Energies
AC/DC parallel transmission is a critical approach for large-scale centralized transmission. Existing assessments of power transfer capability in AC/DC corridors rarely incorporate comprehensive security and stability constraints, potentially leading to ...
Zhengnan Gao, Zengze Tu, Shaoyun Ding, Liqiang Wang, Haiyan Wu, Xiaoxiang Wei, Jiapeng Li, Yujun Li   +7 more
doaj   +2 more sources

Study of the offshore wind farm based multi-terminal DC system and the application of high power DC-DC converters [PDF]

, 2019
Wind power is a type of renewable energy source which has vast potential for further development as it is featured as pollution-free and plentiful. However, wind power turbines also have negative consequences for the environment (in particular visual ...
Rong, Xiaoyun
core   +3 more sources

An Active Power Coordination Control Strategy for AC/DC Transmission Systems to Mitigate Subsequent Commutation Failures in HVDC Systems

, 2021
Subsequent commutation failures (CFs) in HVDC systems will cause large-scale power flow transfer in AC/DC transmission systems and lead to overload risk in HVAC systems.
Jianfeng Dai, Cangbi Ding, Yang Hu, Feng Xue, Zhaowei Li, Xia Zhou, Zhaohui Qie   +6 more
core   +1 more source

The Possibility of Enhanced Power Transfer in a Multi-Terminal Power System through Simultaneous AC–DC Power Transmission

, 2021
The feasibility of power transfer enhancement, through simultaneous AC–DC power transmission in a two-terminal transmission network, has been proposed earlier by the authors, and the concept is well established.
Shaista Parveen, Hafizur Rahman, Basem Alamri, Akbar Ahmad, Salman Hameed, Khaliqur Rahman, Mohd Tariq   +6 more
core   +1 more source

Optimal power flow in multi-terminal HVDC networks with embedded high-power DC-DC converters for voltage matching and flexible DC transmission [PDF]

, 2020
High-power DC-DC converters are integrated into multi-terminal high-voltage DC (MTDC) networks, typically for voltage matching or flexible DC transmission.
Sayed, S., Massoud, Ahmed
core   +1 more source

Studies of large‐scale DC connected photovoltaic power system based on multi‐modular cascaded DC‐DC converter

IET Generation, Transmission & Distribution, 2023
DC collection and transmission is one of the major development directions of large‐scale photovoltaic (PV) power system. In order to achieve low‐cost, high‐efficiency and long‐distance transmission of PV power, this paper adopted a DC grid‐connected ...
Fei Liu, Yushuo Chen, Jian Shi, Lu Qu, Zhenning Zi, Zhanqing Yu   +5 more
doaj   +1 more source

Techno-Economic Comparisons of HVAC and Simultaneous AC-DC Transmission

Journal of Electrical and Computer Engineering, 2022
Electric power consumption has been increasing rapidly across the globe; this increase specially accelerated in the last decade. Consequently, existing transmission lines are becoming overloaded beyond their power transfer capability.
Lijalem Dires Asmare, Belachew Bantyirga Gessesse, Elias Mandefro Getie   +2 more
doaj   +1 more source

DC blocking criterion and measure calculation method for VSC-HVDC grid of ring structure

电力工程技术, 2022
In the past, the structures of conventional direct current (DC) and flexible DC transmission projects were end-to-end or multi-terminal radiation. The corresponding stability control system uses the converter electric quantity and pole emergency switch ...
XU Ke, LIU Yimin, ZHENG Shaoming, BAI Yang, ZHU Wan, REN Zuyi   +5 more
doaj   +1 more source

A Mixed-Integer Second-Order Cone Programming Algorithm for the Optimal Power Distribution of AC-DC Parallel Transmission Channels

Energies, 2019
For the controllability of the transmission power of DC transmission channels, the optimal power distribution (OPD) of AC-DC parallel transmission channels is an effective measure for improving the economic operation of an AC-DC interconnected power grid.
Shunjiang Lin, Zhibin Yang, Guansheng Fan, Mingbo Liu, Sen He, Zhiqiang Tang, Yunong Song   +6 more
doaj   +1 more source