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Luo W.,State Grid Electric Power Research Institute of China | Dai Z.-M.H.,State Grid Electric Power Research Institute of China | Huo Q.-T.,NARI Technology Development Co.
APAP 2011 - Proceedings: 2011 International Conference on Advanced Power System Automation and Protection | Year: 2011

It is urgent to cognize grid operation state along with complication of electric power characteristic. First, database structure was expounded in this paper. Secondly, Grid state judge Procedures was introduced detailed. Last, the concept of Grid Operation State Cognition Flag which was used to represent indexes group state and grid state was advanced in the end of this paper. © 2011 IEEE. Source

Jiang T.,China Electric Power Research Institute | Yu H.,NARI Technology Development Co. | Xia L.,China Electric Power Research Institute
China International Conference on Electricity Distribution, CICED | Year: 2012

According to the shortage of systemic experimental enviromen for fault line selection method, it puts forward a test and research method based on RTDS. A systemic experimental enviroment consists of simulation models and automatic equipment, and the simulation models are built on RTDS, which can simulate kinds of typical fault and can output the analog signals. Through many types of tests, the test methods are proved feasible, and the algorithm of fault line selection are also proved exact and practical. © 2012 IEEE. Source

Chen W.,Zhejiang University of Technology | Shao Y.,Zhejiang University of Technology | Jiang Y.,Zhejiang University of Technology | Xia C.,NARI Technology Development Co.
International Journal of Computer Applications in Technology | Year: 2013

In this paper, to improve the generalisation ability of generalised eigenvalues proximal support vector machines (GEPSVM), we propose an ensemble GEPSVM, called EnGEP for short. Note that GEPSVM is not sensitive to different weights of the points, to increase the potential diversity of GEPSVM, firstly, we introduce an extra parameter in GEPSVM, which gives different penalties for two non-hyperplanes determines by GEPSVM. Then, we use a novel bagging strategy to ensemble GEPSVM with additional parameters. Experimental results both on artificial and benchmark datasets show that our EnGEP improves the generalisation performance of GEPSVM greatly, and it also reveals the effectiveness of our EnGEP. Copyright © 2013 Inderscience Enterprises Ltd. Source

Hua G.,China Electric Power Research Institute | He W.,China Electric Power Research Institute | Li X.,NARI Technology Development Co.
IET Conference Publications | Year: 2012

Pumped storage power plants have lots of functions such as load peak adjusting, load valley filling, frequency and phase regulation, emergency duty, flood protection, etc. They also have advantages of operating flexibility and fast response characteristics. Apparently they may play more and more important roles in construction of smart power grid today. In addition, control strategies and major components' design principle of large pumped storage unit excitation system are introduced. It is in favor of promoting development of domestic large pumped storage units' excitation systems and provides reference to design of similar excitation systems. Source

Jiangsu Nanjing Power Supply Company, NARI TECHNOLOGY DEVELOPMENT Ltd COMPANY, State Grid Electrical Power Research Institute and Jiangsu Electric Power Company | Date: 2014-06-10

The invention discloses a global optimization and dispatching method based on time scales. The time scale based global optimization and dispatching method disclosed herein, relies on a target value system and a dispatch model. The global optimization and dispatching method depends on the results from a variety of subtopics. The methods provide adjustment and optimization in accordance with the time scales that are given in the sub goal of each sub topic: long-term, mid-long-term, short-term, ultra short term and real time optimization. Smart distribution grid can improve operational efficiency, integrated application of new elements in the distribution network of distribution energy network, micro grid, energy storage device and non-linear loads. This invention is fully adapted to the smart grid trends, with a good prospective.

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