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With the increasing development of wind power, the capacity of wind farms is larger and its impact on grid operation has become more prominent. The fault current that wind farms provide is much different from the traditional synchronous machines. Wind farms in China are mostly centrally connected to power system. The central integration enlarges the impacts on power system. The correct action of the...
Improved reliability and safety of the Medium Voltage DC (MVDC) power distribution systems on board of a ship are the objectives of this work. The authors propose the integration of the self-healing capability of the protection against power system faults, and the protection against measurement faults. Most of previous work in literature focuses on only one of these aspects at a time. Here, the authors...
Decentralized state estimation of power system is under investigation for the monitoring of modern power system. In this framework, the identification of sensor failure is a critical issue. In this work, a novel method is proposed to achieve this goal, yielding improved reliability of the decentralized power system monitoring. Sensor measurements are validated locally, before they are elaborated....
The reliability of the power system state estimation depends on the availability of the measurements, which may be affected by hardware faults, especially sensor failures. In this work the authors present a novel fault-tolerant decentralized state estimator based on the polynomial chaos theory (PCT). This estimator has been developed to detect, diagnose, and isolate failed sensors. The sensor measurements...
This paper presents the derivation of a simple, low order system frequency response (SFR) and system voltage response (SVR) model, that can be used for estimating the paper establishes the range of responses that describe the behavior of a 33 kV islanded distribution network of certain structure and composition by grouping similar frequency and voltage responses of the network.
Utilizing aggregated electric loads as system resources has several benefits. It can provide ancillary services for power systems. At the same time, it can provide demand management for electricity customers. It is necessary to develop integrated control strategies for aggregated electric loads. Most domesticwater heaters (DWHs) are electric and they consume much power especially in winter. DWHs represent...
This paper presents a domestic hot water heater model to be used in a demand side management program. Water heater loads are extracted from household load data, and then used do develop household water usage data. The model incorporates both the thermal losses and the water used to determine the temperature of the water in the tank. The model will be used in the future to develop intelligent control...
This paper assesses the transient operation of a 33 kV distribution network in islanded operation consisting of different type and size of loads and distributed (mainly renewable) generators. The generators considered include synchronous generator representing the combined heat and power unit, fixed speed induction generator, doubly fed induction generator and power electronic connected photovoltaic...
Continuation power flow is a powerful tool to simulate power system steady-state stationary behaviours with respect to a given power injection variation scenario. Although continuation power flow methods have been implemented in several commercial packages, they may be still too slow for online applications. The authors aim to improve the continuation power flow methods, mainly their speed and, to...
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