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Energy management systems (EMS) on demand sides are expected as a method of controlling electricity supply and demand balance in power grids including large amount of PV power generations. EMS is supposed to determine the optimal daily operation of energy appliances including energy storage factors economically and efficiently to satisfy consumer's desire taking account of forecasted energy demand...
The State Estimator is an important tool that ERCOT relies on to monitor the real time state of power grid. As the parameter and topology errors are critical to the quality of state estimator results, operations engineers in ERCOT are using multiple tools to detect and identify the topology and parameter errors in ERCOT EMS network model. This paper will present ERCOT experience in detecting and identifying...
The auxiliary line loss management system in Hebei grid is developed. The data of system are taken from EMS. After getting data from EMS, state estimation will be carried out periodically. The ground state of power flow is from the results of state estimation. The hardware configuration of system is introduced. A data receiving server is configured to receive model, graphic and data in auxiliary line...
Korea power exchange (KPX) plays a pivotal role in South Korea's electric power industry. As a neutral and independent organization, KPX coordinates the flow of electricity through all transmission networks of South Korea, ensure reliable operation of the grid, operate cost-based competitive electricity market, and plan long-term generation/transmission expansion to secure reliable power supply. To...
In order to find hidden cascading outage caused by protective relays, methods for modeling, simulating and online setting-checking of protective relays are studied here. A user-defined model is proposed based on a kind of scrip language and concept of component firstly. Based on that, the power system simulator in a commercial dispatcher training simulator is embedded with protective relay simulator,...
Application of integrated EMS of dispatching - centralized control in Guangzhou electric network control center is described and analyzed in this paper. As the describe of the architecture and the characters of the Application, the new characters, problem and method is focused on in this paper. The two integrated EMS of dispatching - centralized control in Guangzhou electric network control center...
Energy Management Systems (EMS) play the all important role of monitoring and control of the power systems and state estimation forms its backbone. In these days of increased operation of power system near to its limits and the tendency to utilize the grid to its full potential, monitoring and control with high level of accuracy becomes a boon. Dynamic state estimation (DSE) techniques with their...
Energy management systems (EMSs) suffer from poor external modeling during wide area event occurring in interconnected power systems. In order to improve this situation, an IEC61970 standard based hierarchical network remodeling system for electrical power control centers is designed in China. In this designed system, through a wide-area communication network, each underlying control center automatically...
This paper introduces a PC cluster based supporting platform, called wide logic grid (WLGrid), for new generation of EMS. This platform has an open and loosely coupling plug-in architecture, which allows components developed individually to be easily plugged into the system. A component-based development (CBD) pattern is used to develop this platform, which can make software modules loosely coupled...
This paper presents a cost effective approach, using special-purpose hardware implemented using field programmable gate arrays (FPGA) - commodity programmable hardware, to accelerate the performance of key components of an energy management system (EMS). These components include state estimation, optimal power flow, and load flow computation. All of these components have at their core the solution...
For different computer technology and development practice during periods, information systems are often isolated with each other in power dispatching center. Shares of information resource have been proved to be difficult and expensive. The two typical data resources, online EMS data and offline data are analyzed. The technology of integration of the two data sources is researched and developed....
In order for electric power generating capacity to be supplanted to a meaningful extent by sources smaller than 200 kW, an automated means of managing systems of small sources must be found or their sheer number will over-whelm the power production community. Micro grids - power systems comprising multiple small interconnected generators - are a promising response to this need, but an automated micro...
Prior to the start up of the standard market design (SMD-2), the New York independent system operator (NYISO) used various tools to maintain and update three network models used to support the energy management system (EMS) and business management systems (BMS) applications. The process of maintaining and updating the network models for EMS & BMS applications became more challenged and cumbersome...
In this paper, a wide area monitoring system (WAMS) for the 420 kV Norwegian bulk transmission grid has been evaluated. The robustness of the PMU measurements has been demonstrated by a direct comparison of phasor information from the PMUs and a state estimator (EMS). The paper highlights benefits of both off-line and on-line WAMS applications: a method for real-time detection of power oscillations,...
Control centers (CC) play a very important role in power system operation. An overall view of the system with information about all existing resources and needs is implemented through SCADA (Supervisory control and data acquisition system) and an EMS (energy management system). As advanced technologies have made their way into the utility environment, the operators are flooded with huge amount of...
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