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In this paper a platform is developed to facilitate the control of household loads using communication protocols relevant to home automation and substation automation systems. Protection IEDs that support IEC 61850 standard based protocol, universal secondary test gear for relays and a protocol converter are used to realize the protection/automation aspects for substation automation. The retrofitting...
For managing carbon emission, micro-generation with different capabilities are being actively explored for grid integration. Such small scale generation connected to low and medium voltage conventional network that are not designed to accommodate distributed generation pose various issues like voltage rise during off peak hours. The aim of this paper is to evaluate different inverter control strategies...
In this paper, an intelligent on-load tap changer (OLTC) control scheme is introduced that is based on the changes of the transformer primary side voltage and current caused by the OLTC action. It is shown that the changes in the voltage and current can be used to estimate the supply system Thevenin impedance and to monitor the OLTC stability by using a simple index. The proposed method is validated...
Due to economic reasons, the increase in power demand and available technical possibilities many 2-terminal lines are being upgraded to 3 or more terminal lines. However, this type of configuration also raises more complexity around protection and locating faults which require a lot of assessment to ensure the security of the new network. This paper is a bibliographical survey to summarize the relevant...
IEC 61850, which is the leading standard for the substation automation, can be used to develop smarter schemes of automation and protection for the other areas of power systems. This paper presents an approach of using GOOSE to address the distribution protection problem in a smart grid. It is shown that how an adaptive overcurrent element setting of a healthy distribution feeder can be used to solve...
In this paper the feasibility of applying a Smart remedial action scheme (RAS) based on the coordinated control of on load tap changers is investigated. Different from most of the existing RASs, the proposed method uses the measured voltage and current phasors to enhance the system security by balancing the power flow in the lines feeding a load. The configuration of implementing the method with IEC...
Solid state transformer (SST) is a bi-directional electricity exchange device that is proposed to accommodate widespread Distributed Energy Resources (DERs) and Distributed Energy Storages (DESs) into the existing distribution systems.
Automatic Under-Frequency Load Shedding (AUFLS) is the last resort for New Zealand (NZ) power system to prevent widespread blackout following severe system contingency. This paper provides a systematic review of existing AUFLS in New Zealand power system and assesses future potentials that can be enabled through emerging Smart Grid technology investments in distribution networks. A new AUFLS scheme...
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