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Zhou G.,Nanjing Southeast University | Zhang X.,Nanjing Southeast University | Lang Y.,China Electric Power Research Institute | Bo R.,Midcontinent Independent System Operator Inc. | And 3 more authors.
International Journal of Electrical Power and Energy Systems | Year: 2016

Graphics processing unit (GPU) has been applied successfully in many computation and memory intensive realms due to its superior performances in float-pointing calculation, memory bandwidth and power consumption, and has great potential in power system applications. Contingency screening is a major time consuming part of contingency analysis. In the absence of relevant existing research, this paper is the first of its kind to propose a novel GPU-accelerated algorithm for direct current (DC) contingency screening. Adapting actively unique characteristics of GPU software and hardware, the proposed GPU algorithm is optimized from four aspects: data transmission, parallel task allocation, memory access, and CUDA (Compute Unified Device Architecture) stream. Case studies on a 3012-bus system and 8503-bus system have shown that the GPU-accelerated algorithm, in compared with its counterpart CPU implementation, can achieve about 20 and 50 times speedup respectively. This highly promising performance has demonstrated that carefully designed performance tuning in conjunction with GPU programing architecture is imperative for a GPU-accelerated algorithm. The presented performance tuning strategies can be applicable to other GPU applications in power systems. © 2016 Elsevier Ltd. All rights reserved.


Zhang J.,Hangzhou Electric Power | Zhang J.,Dalian University of Technology | Wu Z.,Hangzhou Electric Power | Cheng C.-T.,Dalian University of Technology | Zhang S.-Q.,Fujian Electric Power Dispatching Center
Water Science and Engineering | Year: 2011

In this paper, a hybrid improved particle swarm optimization (IPSO) algorithm is proposed for the optimization of hydroelectric power scheduling in multi-reservoir systems. The conventional particle swarm optimization (PSO) algorithm is improved in two ways: (1) The linearly decreasing inertia weight coefficient (LDIWC) is replaced by a self-adaptive exponential inertia weight coefficient (SEIWC), which could make the PSO algorithm more balanceable and more effective in both global and local searches. (2) The crossover and mutation idea inspired by the genetic algorithm (GA) is imported into the particle updating method to enhance the diversity of populations. The potential ability of IPSO in nonlinear numerical function optimization was first tested with three classical benchmark functions. Then, a long-term multi-reservoir system operation model based on IPSO was designed and a case study was carried out in the Minjiang Basin in China, where there is a power system consisting of 26 hydroelectric power plants. The scheduling results of the IPSO algorithm were found to outperform PSO and to be comparable with the results of the dynamic programming successive approximation (DPSA) algorithm. Copyright © 2011 Editorial Office of Water Science and Engineering.


Lin J.,Fujian Electric Power Dispatching Center | Chu Z.,North China Electrical Power University | Cheng Z.,Fujian Electric Power Dispatching Center | Mi W.,NARI Group | And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2016

A unified modeling scheme of full-business in the control center based on time dimension is proposed for the inadequacy of the smart grid dispatching and control system. In the scheme, specific solutions of some key technologies have been proposed, such as the unified maintenance technology for the model of full-business in the control center based on time dimension, the extraction of the business model of time section, model cooperative validation technology, model submittal to online system based on construction task, etc. The scheme has been pilot applied in the control center. Practice shows that it can achieve unified maintenance and management for multi-time scales and multi-application models while providing data support for full-business systems collaboration in the control center. Isolated from the operation and maintenance of the smart grid dispatching and control system, the scheme has improved the stability and the reliability of the system. © 2016, Automation of Electric Power Systems Press.


Liu T.,State Grid Corporation of China | Mi W.,NARI Group | Chen Z.,Fujian Electric Power Dispatching Center | Lin J.,Fujian Electric Power Dispatching Center | And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2015

The development of grand operation business such as integrated dispatching and integrated control makes higher requirements on integrated maintenance and sharing of all-service model and graphics inside a dispatching and control center. A brief description is made of the current application of integrated two-way sharing of models, graphics and calculation results between dispatching and control centers as well as the new application demand of the grand operation. An information sharing scheme of grid model and graphics applicable to the grand operation is proposed. And a thorough study is made on such aspects as integrated maintenance and sharing of all-service model and graphics inside a dispatching and control center, plus integrated two-way sharing of application models, graphics and calculation results between control centers, unified verification of model and graphics, and model information publishing. Practice shows that the scheme is able to meet the demand of the grand operation development by laying a good foundation for close coordination, unified deployment, and integrated operation within a control center and between control centers.


Xu D.,State Grid Electric Power Research Institute of China | Mi W.,State Grid Electric Power Research Institute of China | Deng Y.,Fujian Electric Power Dispatching Center | Ye F.,State Grid Electric Power Research Institute of China | And 3 more authors.
Dianwang Jishu/Power System Technology | Year: 2012

Based on technical supporting systems for smart grid dispatching and smart substation system and according to the functional demand of dispatch master station to the substation, an integrated modeling scheme for coordinated sharing of models/images and seamless communication between dispatch master station and smart substation is proposed, by which practicable converting rules between IEC 61850-based model and IEC 61970-based model are drafted; a unified data model-based mapping approach for IEC 61850-based model and IEC 61970-based model is put forward; by means of splitting/merging technique of models and self-converting technique of Ids of graphs and so on, the integrated modeling between dispatch master station and smart substation is implemented; utilizing message bus service of dispatch master station and manufacturing message specification (MMS) protocol stack, the IEC 61850 protocol-based communication at dispatch master station side is attained, thus the coordinated sharing of models/images and seamless communication between smart substation and dispatch master station is implemented, and the capacity of information interaction between smart substation and dispatch master station is increased and the workload of model coordination in heterogeneous systems is reduced.


Lin C.-W.,Fujian Electric Power Survey and Design Institute | Zhuo Z.-J.,Fujian Electric Power Dispatching Center | Zhou J.,Fujian Electric Power Survey and Design Institute | Liu Z.-W.,Fujian Electric Power Survey and Design Institute | Lin D.-Y.,Fujian Electric Power Survey and Design Institute
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2010

Aiming at the technical difficulties of modifying setting value without blackout, this paper brings forward detailed solutions. Through analyzing the equipment situation of Fujian power grid, it compares several programs for remote verification and modification of the setting value without blackout, then recommends utilizing substation computer monitoring system to realize remote verifying and modifying setting value. In addition, it introduces main function, detailed process, equipment configuration and security measures of the remote modification and verification system of the setting value.


Zhou L.,Chongqing University | Zeng Y.,Chongqing University | Guo K.,Chongqing University | Zhang Y.-Y.,Fujian Electric Power Dispatching Center | And 2 more authors.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2012

Nowadays power systems have higher demand on power quality, and the photovoltaic (PV) grid-connected system usually operates in low utilization due to the characteristics of intermittency and uncertainty, therefore, improving the utilization rate of PV grid-connected system and power quality of grid power system attracts wide attention. This paper outlines the development background and significance of power quality regulatory function in the PV grid-connected system, and summarizes the effect of PV grid-connected system on grid power quality. It concludes the methods to suppress harmonics and improve voltage profile according to different control methods and structures. The characteristics and application ranges of different methods are analyzed with examples and simulations. Then the main aspects, such as weather circumstances, load condition, real capacity, regulatory objects, system types, economic cost, etc. are proposed. Finally, the existing problems of the PV grid-connected system with power quality regulatory function are pointed out and its study direction in the future is also looked ahead.


Cheng C.-T.,Dalian University of Technology | Liao S.-L.,Dalian University of Technology | Wu X.-Y.,Dalian University of Technology | Zhang S.-Q.,Fujian Electric Power Dispatching Center
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2010

A spatio-temporal resolution to solve the optimal operation problem of complex inter-basin hydropower systems based on analyzing the existing optimal operation technologies and using computer science and artificial intelligence is suggested. The resolution includes directed-graph technology to describe the topology of cascade hydropower stations, smart memory and script control technology to set the restrictions automatically, interface programming and the same model in MVC to handle the linkage between table and chart and multi-reservoir operation. The mid-long term runoff prediction systems, long-medium-short term optimal operation systems and real-time operation systems in power grids of the Fujian Province, Yunnan Province and Guizhou Province, which adopting these technologies, have been applied successfully.


Lin J.,Fujian Electric Power Dispatching Center | Mi W.,China Electric Power Research Institute | Ye F.,China Electric Power Research Institute | Jiang G.,China Electric Power Research Institute | And 2 more authors.
Dianwang Jishu/Power System Technology | Year: 2011

Distributed integration modeling technique is one of core technologies of intelligent dispatching. Based on the principles of source maintenance and global sharing, this technique implements trans-layer and trans-region distributed integration modeling. The issues such as verification of power network model, maintenance of model boundary and so on, which occur during the application of distributed integration modeling, are analyzed and solutions for these issue are given. An effective method to verify power network model is put forward to ensure the correctness of the source model; an intelligent method to maintain model boundary is proposed, thus the cumbersome maintenance of model boundary is thoroughly resolved; a concrete approach for integrated online synchronization is given, thus the problem of submitting graphics, data and model into online system without disturbance is solved. Solutions of these issues are the perfection and supplement to distributed integration modeling for smart grid.


Wang S.,Dalian University of Technology | Cheng C.,Dalian University of Technology | Li B.,Dalian University of Technology | Zhang S.,Fujian Electric Power Dispatching Center | And 2 more authors.
Shuikexue Jinzhan/Advances in Water Science | Year: 2013

The decision maker's experience and knowledge on judgments have a significant influence on the actual flood control operation. In this paper, the decision maker's experience on flood control pre-discharge dispatching and on the required persistent state of releasing flood waters are considered as constraints , and a multi-constrained heuristic progressive optimality algorithm (MHPOA) for flood control operation is thus proposed. In the MHPOA, the general operation rule for flood releasing is seen as heuristic information, which controls the operation of increasing or decreasing discharge rates by judging the variation tendency of inflow and reservoir level. The heuristic information is combined with the progressive optimality algorithm to searching for the optimal operation of flood control with the objective of maximal flood peak reduction. The proposed algorithm is tested for 5 different scenarios designed for optimizing the flood control operation in the Shuikou reservoir. The result shows that the MHPOA is able take a full account of decision maker's experience and knowledge on judgments, reduce the refill risk caused by the issue of too low reservoir levels in the pre-discharge period, avoid the fluctuation of discharge, and obtain the satisfactory solution.

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