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This paper investigates the impacts of circuit breaker performance on voltage instability corrective actions for power systems with distributed generations (DGs) under contingencies, and proposes a new computer network-aided strategy for stability improvement. This strategy aims to save a distribution system from imminent voltage collapse due to contingencies occurring in subtransmission system, distribution...
Recently electricity generation from wind power has been increasingly popular worldwide. This paper proposes an adaptive protection and control strategy for interfacing the wind-powered distributed generators into the utility power distribution grids. The requirements for the interfacing are defined according to the IEEE-1547 standards. This paper presents the adaptive interfacing controls and protections...
Distributed generations (DGs) powered by renewable energy resources have become increasingly popular and starts to show benefits, but their connection to distribution systems brings operation challenges that must be carefully monitored and controlled. This paper proposes a new network-enabled, real-time monitoring strategy for tracking the operating states of the distribution system, with a focus...
Recently increased use of network-enabled devices in power systems, rapid development of distributed generations from renewable energy resources, and government-imposed open access competition have resulted utilities in greater reliance on computer networks for proper power grid operations. This paper proposes a new two-level architecture for power-grid computer networks and to strength the networks'...
This paper proposes a new strategy for computer network-assisted corrective actions against short-term and long-term voltage instabilities in the electricity power distribution system connected with renewable-energy distributed generations. The proposed strategy aims to save the distribution system from imminent voltage collapse due to contingencies occurring in the subtransmission network, distribution...
Operations of electricity power systems have recently become more intricate due to development of microgrids, execution of open access competition, and use of network-controlled devices, etc. Computer networks therefore turn into an integral component of modern power-grid operations. This paper proposes a new utility computer network security management and authentication for actions / commands requests...
This paper proposes a new network cyber-security architecture for smart (energy-efficient, environmental-friendly, cost-effective, etc.) power distribution system operations. The focus is on providing cyber-security for smart (time-of-use scheduling, smart metering, dispersed generation tracking, etc.) load-management devices that are networked for collaborative operations and accessible by utility...
This paper proposes a new strategy and platform for computer network-assisted corrective actions against voltage instability in the power distribution systems. The objective of the proposed strategy is to save the distribution system from imminent voltage collapse due to contingencies occurring in the power systems by executing corrective operations. The operations include coordinated local / distributed...
This paper proposes a new computer network-facilitated voltage stability control strategy for electricity power distribution systems connected with distributed generations. The proposed strategy aims to determine stability enhancement operations on two aspects: one is to increase power system operation security during normal conditions, and the other is to save a distribution system from imminent...
Cyber-security for computer networks has become a fairly serious concern for electricity utilities due to recent deregulations and distributed generations (DGs) launched in the power system. This paper proposes a new computer network security strategy for coordinated distribution system operations with open access electricity generations. A novel utility computer network security management and authentication...
Recently increased use of network-enabled devices in power systems, rapid development of distributed generations from alternate energy resources, and government-imposed open access competition have resulted utilities in greater reliance on computer networks for proper power grid operations. The focus of this paper is to propose a new two-level architecture for power-grid computer networks and to strength...
Power distribution system cyber-security concerns are increasing rapidly with growing demands for open accesses to the distribution systems for electricity generation and trading imposed by new government deregulations. This paper proposes a new integrated network security protocol layer, located below the data-link layer of DNP3 - a popular utility protocol, to enhance the data transmission cyber-security...
Potential effectiveness of cyber-attacks against utility networks using protocol DNP3 would increase rapidly, when DNP3 is employed over TCP/IP, because attacks succeed on the Internet can be used against DNP3. This becomes a critical concern for DNP3 since an outstation may be accessed from multiple masters of external networks. However, commercial Internet security does not provide applicable security...
Recent introduction of open access competition by governments in the electricity industry and increase use of network-controlled devices in the power system have resulted utilities in greater reliance on computer networks for their power system operations. This paper proposes a new network access control model that significantly increases the power system network security. The new model extends the...
Power system modernization with increasing operation automation and integration results in growing computer network access. This facilitates cyber-attackers' capabilities to assume control over power system operations that could cause serious blackouts. Security therefore becomes a critical issue for DNP3, a commonly used protocol for power system communications. This paper proposes cyber-security...
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