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Operation and Maintenance(O&M) of equipments serves as one of the most important part for power system operation and management, it is widely concerned while the system is under fast development. This paper provides a concept and technical framework of the Intelligent Operation and Maintenance Center(IOMC) and discusses its functional framework. Detailed business scenarios are analyzed. First,...
Active distribution network is an effective solution to realize the optimizing operation of integrating large-scale distributed energy into distribution network. The intermittency of distributed energy makes the traditional PI control dissatisfying the requirement on the active distribution network control, this paper proposed a method based on model predictive control to apply to the coordination...
Non-standardization of messages when using IEC61968 messages to fulfill information integration of DMS often causes interoperation failures and affects related works. Effective rules and methods to test IEC61968 messages are deficient now. To solve this problem, layered rules along with a metadata & rule-driven framework of IEC61968 message conformance test are proposed. An extensible & loosely-coupled...
Active Distribution Network (ADN) implements the operation and consumption of distributed energy resources (DERs), especially in the use of renewable ones, by hierarchical and distributed coordination control mode. Plenty of advanced communication and control technologies must be integrated in ADN. In this paper, a new method of co-simulation for ADN is proposed based on Ptolemy II and Simulink. In...
Intelligent operation and maintenance is a novel technology mode of advanced transmission and distribution equipment management that can meet the demand of online monitoring, condition-based maintenance and visual management for equipment, as well as rapid load recovery repair and advanced asset management integration requirements. It serves as one of the most significant contexts to promote the standardized...
The micro-grid technology has its limitation in the management of large- scale and extensive distributed energy resource (DER). While active distribution network (ADN) can not only manage the DER actively, but also interact with the demand side, so that large-scale DER can be consumed. By using simulation method and evaluating efficiency of DER and the consumption capability of different consumption...
With the cost declining of Photovoltaic (PV) power generation and the support of government, it can be expected that a large number of PV systems will be accessed to the distribution network in the future. The development of active distribution network provides a good solution to improve the intermittent energy consumptive ability of distribution network. Active distribution network is able to control...
The high penetration of distributed energy resources (DERs) causes huge pressure on the operation and management. In this paper, the distribution network is divided into regions based on the sectionalizing switch position. Each region receives the optimization goal from global optimal power flow (OPF) algorithm. Regional optimization algorithm is based on the indicator of feeder control error (FCE)[1]...
Hybrid energy storage system (HESS) can achieve a better overall performance by combining power-type storage and energy-type storage. The combination enables active distribution network (ADN) to regulate power flow and manage energy more economically and realize active control. This paper analyzes the technical characteristics of the HES S to propose a control strategy of HESS applied in ADN at first...
With the high penetration of distributed energy resource (DER) and energy storage system, the real-time performance of centralized management is really poor. In this paper, a multi-layered model is proposed to implement the control of active distribution network (ADN) in different time scales. The indicator of feeder control error (FCE) is used to represent deviation between real-time operating status...
Automatic annotation of images is of crucial importance in image retrieval and management systems. Most of the existing annotation methods rely on content-based approach to annotation, whose effectiveness is restricted due to the semantic gap between low-level features and semantic annotations, as well as the irrelevance between annotations and image content. Recently, social media analysis has been...
This paper presents studies on the influences of alumina film overly coated on the chip surface on the RF characteristics of surface acoustic wave (SAW) devices during packaging process. An SAW resonator is taken as an example and the surface layer deformation of the chip substrate with different thicknesses of alumina overlay is simulated based on finite element method (FEM). The RF characteristics...
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