The Study and Simulation on Effects of UHV access to Power Grid

DOI

10.2991/icaees-15.2015.213How to use a DOI?

Keywords

Ultra-High Voltage; Stability Analysis; Voltage Adjustment; Sensitivity Analysis

Abstract

The access of Ultra-High Voltage (UHV) line must have a great impact on security and stability of power grid. In this paper, to access a 1000kV UHAC line to a power grid, the stability and security of power grid are analyzed and a sensitivity method is proposed to solve the problem of threshold-crossing voltage. Firstly, it establishes the model of a power grid by using PSD-BPA software and makes analysis of power flow and N-1 static security of lines of 500kV and above. Secondly, by setting up three-phase short circuit malfunctions near the impact point of UHV grid and using the stable curve analysis tools, transient stability of power grid is analyzed. Thirdly, based on the analysis results of the security and stability above, the 220kV grid arises the problem of threshold-crossing voltage. Combined with the sensitivity analysis, a node voltage adjustment program is proposed to solve this problem. It calculates sensitivity value of the reactive power compensation for the threshold-crossing voltage nodes nearby and determines the amount of reactive power compensation. Combined with the methods of reactive power compensation for load nodes and transformer ratio adjustment, it adjusts the level of voltage to more reasonable threshold. Finally, the simulation on the PSD-BPA software proves that the program can effectively adjust the level of voltage to more reasonable range.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Mengyao Zhang
AU  - Xin Wang
AU  - Min Li
PY  - 2015/07
DA  - 2015/07
TI  - The Study and Simulation on Effects of UHV access to Power Grid
BT  - Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015
PB  - Atlantis Press
SP  - 1149
EP  - 1152
SN  - 2352-5401
UR  - https://doi.org/10.2991/icaees-15.2015.213
DO  - 10.2991/icaees-15.2015.213
ID  - Zhang2015/07
ER  -