作者机构：
[何怡刚; 王小华] Coll. of Elec. and Info. Eng., Hu'nan Univ., Changsha 410082, China;[王小华] Coll. of Elec. and Info. Eng., Changsha Univ. of Sci. and Technol., Changsha 410077, China
通讯机构：
Coll. of Elec. and Info. Eng., Hu'nan Univ., China
关键词：
high order FIR digital filters;amplitude-frequency response;neural network;convergence theorem;optimal design
摘要：
An optimal design approach of high order FIR digital filter is developed based on the algorithm of neural networks with cosine basis function . The main idea is to minimize the sum of the square errors between the amplitude response of the desired FIR filter and that of the designed by training the weights of neural networks, then obtains the impulse response of FIR digital filter . The convergence theorem of the neural networks algorithm is presented and proved,and the optimal design method is introduced by designing four kinds of FIR digital filters , i.e., low-pass, high-pass,bandpass , and band-stop FIR digital filter. The results of the amplitude responses show that attenuation in stop-bands is more than 60 dB with no ripple and pulse existing in pass-bands, and cutoff frequency of passband and stop-band is easily controlled precisely . The presented optimal design approach of high order FIR digital filter is significantly effective.
期刊：
Proceedings of the 2004 IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies (DRPT2004),2004年2:602-605
关键词：
Grid Computing;Load modeling;Multi-agent system
摘要：
Computing Grid are an approach for building dynamically constructed collaborative problem solving environment using geographically and organizationally dispersed high performance computing and data handling resources. It provides a novel computation mode for power system simulation and modeling. This paper put out a grid computing infrastructure for load modeling, thus to provide the computation capacity needed in measurement based load modeling with disturbed data logged by WAMS (wide area measurement system). The infrastructure is practical and is of good scalability, highly automation, and huge computation capacity.
作者机构：
[Yang, Hongming] College of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha, Hunan, 410077, China
通讯机构：
College of Electrical and Information Engineering, Changsha University of Science and Technology, China
摘要：
In order to reduce the difficulties in using nodal pricing, the notion of price zone is widely adopted in actual pricing scheme. The key for establishing simple and efficient zonal pricing scheme is to accurately partition transmission network in the presence of congestion. Unfortunately, in actual power market operation, operators usually establish price zones based on their experience, considering the locations of congested lines, without mathematical analysis. In order to achieve accurate price zone partition without any a priori partition knowledge, this paper firstly extracts the sensitivities of nodal power injections to power flows on all congested lines as cluster features of nodal price. Secondly, the scale-space theory simulating human visual system is introduced, and further a scale-space-based hierarchical clustering method for price zone partition is proposed. Finally, test results on IEEE 118-node system show the validity and feasibility of this proposed method.
通讯机构：
[Zeng, XJ] C;Changsha Univ Sci & Technol, Coll Elect & Info Engn, Changsha 410077, Hunan, Peoples R China.
会议名称：
39th Annual Meeting of the IEEE-Industry-Applications-Society
会议时间：
OCT 03-07, 2004
会议地点：
Seattle, WA
会议主办单位：
Changsha Univ Sci & Technol, Coll Elect & Info Engn, Changsha 410077, Hunan, Peoples R China.
会议论文集名称：
IEEE INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING
关键词：
Fault location;Global position system;Traveling-wave
摘要：
Fault location using traveling wave has been applied in extra-high voltage power grids successfully. Due to its complication and high cost, it is not easy for this technique to be accepted for use in distribution system. A new traveling wave fault location system is developed simply in a cost-effective way for power networks (especially for distribution system) in this paper. Two traveling wave sensors are developed to capture the current traveling wave flowing from the capacitive equipment to earth and the voltage traveling waves in all three phases. The outputs of the sensors are then applied to the trigger and time tagging by using Global Position System (GPS) receiver. The fault position is calculated by the traveling wave arrival times in every power station where only one fault locator is installed. The fault location system is tested in the power system. Testing results show that the fault locator has high precision and robustness.
