Provincial Level Key Laboratory of Smart Grid

Chengdu, China

Provincial Level Key Laboratory of Smart Grid

Chengdu, China
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Deng J.,Provincial Level Key Laboratory of Smart Grid | Deng J.,University of Sichuan | Liu J.,Provincial Level Key Laboratory of Smart Grid | Liu J.,University of Sichuan | And 3 more authors.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2011

As the traditional under-voltage load shedding based on static load index may cause the inaccurate analysis, a dynamic voltage stability margin index based on local real-time measurements is derived, which considers the characteristics of node load and reflects, in an approximately linear way without Thevenin equivalence, the load margin of voltage-varying area to greatly reduce the dimension of optimization calculation. The mathematical model of centralized optimal load shedding is built based on that index and HSPPSO is introduced to solve the problem. The simulative results for IEEE 39-bus system show its better adaptability.


Liu Y.,University of Sichuan | Liu Y.,Provincial Level Key Laboratory of Smart Grid | Liu J.,University of Sichuan | Liu J.,Provincial Level Key Laboratory of Smart Grid | Yin L.,Sichuan Electric Power Corporation
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2010

From the view of development, several essential issues of ISM (Intelligent Sale and Marketing) in smart grid construction are discussed, including the differentiation research, the smart grid and power markets, the virtual resource management, the design concept of ISM automation system, which tries to exhibit the theoretical hot spots and application development prospects of ISM in the vision of smart grid. The essential issues discussed about include two aspects: theory and application, which sketches the research line for building the theoretical framework of ISM and gradual implementing its high-level application.


Liu J.,University of Sichuan | Liu J.,Provincial Level Key Laboratory of Smart Grid | Shen X.,University of Sichuan | Shen X.,Provincial Level Key Laboratory of Smart Grid | And 8 more authors.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2010

The development state of smart grid and power grid dispatch is analyzed, and combined with the latest achievements of computer science, the important role of dispatcher in new intelligent dispatch system is described. The intelligent dispatch architecture ″with the dispatcher thinking mode as the framework, the visualized interface as the function module and the interactive computation as the system core″ is proposed, which adapts to the characteristics of power grid in multiple dimensions and carries out the coordination of different parties. The key technologies of intelligent dispatch construction are pointed out in different aspects: man-machine integrated decision-making model, data fusion, situation visualization, fast simulation and modeling, intelligent warning, intelligent dispatch and backup system, emergency center integration, dispatcher behavior assessment, etc.


Zhang J.,Sichuan Electric Power Corporation | Liu J.,University of Sichuan | Liu J.,Provincial Level Key Laboratory of Smart Grid
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2010

A 3D visual system is presented and implemented for power system construction to intuitively show the project schedule instead of texts and logs, which is based on the P3 project management database and uses 3D virtual reality technology to represent the project schedule in 3 dimensions to project manager. Key techniques are discussed, such as schedule data analysis of P3 project schedule database, 3D modeling of power system, render of 3D models, interactive interface of users. Practical application shows its good effectiveness.


Wu W.,University of Sichuan | Wu W.,Provincial Level Key Laboratory of Smart Grid | Liu J.,University of Sichuan | Liu J.,Provincial Level Key Laboratory of Smart Grid | And 3 more authors.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2010

Rapid development and wide application of DER (Distributed Energy Resource) will bring new opportunities and challenges to ISM (Intelligent Sales and Marketing). The developmental outlook of DER is proposed based on the technological roadmap of smart grid. Some new concepts involving distributed generation units are introduced: three-level control information management, power consumption principle, virtual sales & marketing, demand-side guidance, etc., with the innovations brought by DER to ISM emphasized. Aiming at the hotspots of the smart grid vision and energy usage, the ISM involving DER is deeply considered, its modeling and access rights introduced, and its development prospects and research directions discussed.


Tian L.,University of Sichuan | Tian L.,Provincial Level Key Laboratory of Smart Grid | Li C.,University of Sichuan | Li C.,Provincial Level Key Laboratory of Smart Grid | And 2 more authors.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2010

The low-frequency oscillation caused by power grid interconnection is the main endangering factor of its safe operation. Based on the discussion of filter algorithm and Prony algorithm for low-frequency oscillation, an efficient online low-frequency oscillation algorithm and a visualized low-frequency oscillation monitoring method are proposed, which uses the filter algorithm to determine if the low-frequency oscillations starts by vibration screening and the Prony algorithm to conduct a detailed data analysis, and then displays the analyzed low-frequency oscillation information for operators. The master station of wide area measurement system provides the real-time data for the visualized low-frequency oscillation monitoring system. The TCP protocol is adopted and the command frame, configuration frame, data frame and extendable frame are used in the application layer. Site test shows the proposed algorithm and method are effective.


Xu W.,University of Sichuan | Liu J.,University of Sichuan | Liu Y.,University of Sichuan | Liu Y.,Provincial Level Key Laboratory of Smart Grid | And 2 more authors.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2010

The development of smart grid creates a significant opportunity for power sales and marketing. It is urgent to develop new marketing theories and technologies. The current situation of power sales and marketing abroad is studied and the development space is described. In the vision of smart grid, a theoretical system of "intelligent sales and marketing" based on intelligent distribution is established and the innovation of its concept and pattern is prospected. With the consideration of domestic power market environment, recommendations relating to its reformation and development are proposed to guide the domestic researches and occupy the international forefront.


Xu W.,University of Sichuan | Xu W.,Provincial Level Key Laboratory of Smart Grid | Liu J.,University of Sichuan | Liu J.,Provincial Level Key Laboratory of Smart Grid | And 2 more authors.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2013

From the aspects of split section and time, a globally coordinated control of power system split is proposed. The correlation among generator groups in system is obtained by the online slow coherency analysis during non-faulty period; the actual grouping pattern of generator swing is detected during faulty period by the MIA(Mean Index Adequacy) coherency identification; in the constraint of grouping pattern, the relationship among buses is expressed as the topological distance and the K-Medoids clustering of system buses is carried out according to the distance to obtain the split section meeting the constraint of islanding power balance; in order to avoid the cascading split and premature split, the "activation-blocking" strategy is applied to all lines in system to quickly and simultaneously split all participated power lines after the out-of-step signal of generator is detected. Simulation is carried out for IEEE 118-bus system and result shows that, when the inter-area oscillation caused by disturbance occurs in system, the proposed strategy successfully islands the system within 0.1 s, satisfying both dynamic and static power balance of generators.


Zhang Y.,University of Sichuan | Zhang Y.,Provincial Level Key Laboratory of Smart Grid | Yang H.-G.,University of Sichuan | Yang H.-G.,Provincial Level Key Laboratory of Smart Grid | And 3 more authors.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2012

At present, the dedicated wired network transmission mode used to transfer power quality monitoring data has some shortcomings, for example, the accessing terminals scope and the bandwidth resources are constrained, the investment of construction and maintenance is large and the period is long, and so on. To deal with them, this paper proposes a 3G-based power quality monitoring system wireless communication network. The hardware architecture of wireless communication network is proposed and the VPN technology based on the L2TP and IPSec combination is used to build a virtual private monitoring data transmission channel. Through analyzing the measured data transmission rate, network stability and anti-attack capability during the test run, the high reliability, security and practical value of this solution are proved. Currently the 3G wireless networks is successfully applied in Sichuan power grid unified power quality monitoring system as an important supplement to the wired network.


Zhang Y.,University of Sichuan | Zhang Y.,Provincial Level Key Laboratory of Smart Grid | Yang H.,University of Sichuan | Yang H.,Provincial Level Key Laboratory of Smart Grid | And 3 more authors.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2012

A power quality ancillary service platform based on the electric power information network of power supply enterprises is proposed, which applies the power quality monitoring data and offers various ancillary service functions, such as the effect evaluation of disturbance source and the design and verification of filter and SVC parameters. Its software architecture is based on the multi-Agent technology and each basic Web Service is abstractly encapsulated as an Agent. Different Agents can be dynamically integrated as needed to implement an advanced power quality ancillary service task, which optimizes the operating performance of ancillary service, enhances its intelligence and expansibility, and makes the functions applicable by other heterogeneous systems. The designed Sichuan power quality ancillary service platform has been successfully put into operation.

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