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Appl. Sci. 2017, 7(5), 487; doi:10.3390/app7050487

Decision Optimization for Power Grid Operating Conditions with High- and Low-Voltage Parallel Loops

1
State Grid Shandong Electric Power Research Institute, Jinan 250003, China
2
Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan 250061, China
*
Author to whom correspondence should be addressed.
Academic Editor: Eric Ka-wai Cheng
Received: 15 March 2017 / Revised: 26 April 2017 / Accepted: 5 May 2017 / Published: 9 May 2017
(This article belongs to the Special Issue Energy Saving)
View Full-Text   |   Download PDF [1894 KB, uploaded 9 May 2017]   |  

Abstract

With the development of higher-voltage power grids, the high- and low-voltage parallel loops are emerging, which lead to energy losses and even threaten the security and stability of power systems. The multi-infeed high-voltage direct current (HVDC) configurations widely appearing in AC/DC interconnected power systems make this situation even worse. Aimed at energy saving and system security, a decision optimization method for power grid operating conditions with high- and low-voltage parallel loops is proposed in this paper. Firstly, considering hub substation distribution and power grid structure, parallel loop opening schemes are generated with GN (Girvan-Newman) algorithms. Then, candidate opening schemes are preliminarily selected from all these generated schemes based on a filtering index. Finally, with the influence on power system security, stability and operation economy in consideration, an evaluation model for candidate opening schemes is founded based on analytic hierarchy process (AHP). And a fuzzy evaluation algorithm is used to find the optimal scheme. Simulation results of a New England 39-bus system and an actual power system validate the effectiveness and superiority of this proposed method. View Full-Text
Keywords: parallel loop; line switching; complex network theory; GN algorithm; comprehensive evaluation model parallel loop; line switching; complex network theory; GN algorithm; comprehensive evaluation model
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Yang, D.; Zhao, K.; Tian, H.; Liu, Y. Decision Optimization for Power Grid Operating Conditions with High- and Low-Voltage Parallel Loops. Appl. Sci. 2017, 7, 487.

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