Coordination and Control Strategy for Edge Traffic Load Balance of Multi-source Distribution Network

2017 ◽  
Author(s):  
Jianming Zhang ◽  
Lei Lv ◽  
Min Zhu ◽  
Qing Zhang
Keyword(s):  
Control Strategy ◽  
Load Balance ◽  
Distribution Network ◽  
Traffic Load ◽  
Source Distribution ◽  
And Control ◽  
Coordination And Control ◽  
Traffic Load Balance

A Multi-Level-Objective-Oriented Method for Coordination and Control of Voltage and Reactive Power in Distribution Network

2012 ◽  
Vol 263-266 ◽  
pp. 664-669
Author(s):  
Lin Xie ◽  
Yi Rong Su
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Distribution Network ◽  
Suboptimal Control ◽  
Good Effect ◽  
Power Network ◽  
Reactive Control ◽  
Multi Level ◽  
And Control ◽  
Coordination And Control

A multi-level-objective-oriented method for coordination and control of voltage/reactive power in distribution network is proposed. By referring to the demand for integrated voltage and reactive power control between county and district power network, three-level objective include regional voltage control of the gate area, gate power factor control and reactive control within the power station of the gate area. The control strategy of the adjusting unit based on the nine-zone theory is analyzed, and then the correspondence between the global AVQC and local VQC is discovered, based on which the optimal and suboptimal control strategy of the adjusting unit are proposed. Finally, three steps including urgently cutting off the capacitors, combinatorial control of the capacitors and combinational control of the transformer stalls are taken one after another to realize the coordination and control over the voltage and reactive power between the superior and inferior power network. This method is implemented in the AVQC system of TianJin Chengxi grid, which operates stably and has gained good effect.

scholarly journals Research on the Structure and Control Strategy of a Novel Power Electronic Transformer for AC/DC Hybrid Distribution Network

2019 ◽  
Vol 9 (4) ◽  
pp. 727 ◽  
Author(s):  
Jingguo Rong ◽  
Xin Ai ◽  
Yunning Li ◽  
Dapeng Ren
Keyword(s):  
Control Strategy ◽  
Control Method ◽  
Distribution Network ◽  
Distribution Networks ◽  
Frequency Regulation ◽  
Power Electronic ◽  
Output Stage ◽  
Hybrid Distribution ◽  
And Control ◽  
Virtual Synchronous Machine

Power electronic transformers (PETs), as the core devices of the energy internet, are the key to achieve both effective consumption for renewable energy and the safe and coordinated operation for AC/DC hybrid system. In order to overcome the shortcomings of the existing PETs, a novel PET with an improved structure that applicable for multi-voltage level AC/DC hybrid distribution network is proposed. The topology of the proposed PET is analyzed, and the corresponding control methods are suggested for different parts. The input stage utilizes the modular multilevel converter structure and applies the virtual synchronous machine control strategy to enhance the inertia and damping of the system. The power of the output stage is adjusted flexibly and that enables the PET to provide certain power support to the upper grid and participate in its primary frequency regulation. A combined connection of input-series output-series and input-series output-parallel is applied for the dual-active-bridge modules of the isolation stage to enable network interconnection and electrical isolation of AC/DC grids with significantly different voltage levels. A power coordinated control method is then proposed to meet the power demand of the distribution networks connected to the output stage and ensure stable operations of PET simultaneously. The reliability and efficiency of the proposed PET topology and control strategy for AC/DC hybrid distribution network are finally verified via PSCAD/EMTDC simulation.

scholarly journals Modeling and Control Strategy for Multiterminal Flexible DC Distribution Network with Echelon Utilization Power Battery

Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Min Mou ◽  
Yuhao Zhou ◽  
Wenguang Zheng ◽  
Yurong Xie ◽  
Shipeng Wang ◽  
...  
Keyword(s):  
Power Generation ◽  
Real Time ◽  
Control Strategy ◽  
Rapid Development ◽  
Storage System ◽  
Distribution Network ◽  
Dc Distribution ◽  
Power Battery ◽  
Ring Shape ◽  
And Control

With the integration of distributed renewable energy to the distribution network and the development of multiterminal flexible DC transmission technology, multiterminal flexible DC distribution network has broad application prospects. At the same time, with the rapid development of new energy vehicles, the echelon utilization of power battery has become a research hotspot. By analyzing the characteristics of flexible DC distribution network and echelon utilization battery, the structure and control strategy of modular multilevel converter (MMC), DC solid-state transformer, photovoltaic power generation, wind power generation, and echelon utilization battery energy storage system are established, respectively, in this paper. To achieve a DC network connection of various types of power supply and load, this paper proposes a starting method of multiterminal flexible DC distribution network and a cooperative control strategy of the wind-solar-storage system. A six-terminal ring-shape DC distribution network model is built in real-time digital simulation (RTDS) platform. The simulation results show that the modeling methods and control strategies of each component in the real-time simulation model meet the operation requirements of the multiterminal flexible DC distribution network, which provides a reference for the construction and research of the flexible DC distribution network.

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