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Conventional methods of achieving peak demand reduction for rural cooperatives have allowed 1-2% control during heavy loaded condition without violating customer-side ANSI voltage limits. Distributed grid edge control presents a promising approach for doubling or tripling this benefit by deriving significant value for utilities in the form of voltage support, loss reduction, and peak demand reduction...
Distributed grid edge control presents a promising approach for deriving significant value for utilities in the form of voltage support, loss reduction, peak demand reduction, energy savings and other interesting applications. In this paper, we present a distributed architecture realized using autonomous fast-acting hybrid power electronics devices managed by a software layer. Results obtained from...
A new approach to achieving volt-var control through the use of fast-acting distributed hybrid power electronics devices at the grid edge is proposed. It is shown that there is a missing layer of control at the grid edge which the conventional approaches do not address. Through field demonstration of 91, 10 kVAR devices on a 13 kV, 6 MW feeder, up to 5% CVR, 72% reduction in voltage volatility, 80%...
This paper has provided a vision for the smart transmission grid from the perspective of system protection and control based on IEC 61850 standard. More and more major utilities are beginning to implement IEC61850 and several wide-area protection schemes to standardize their protection and control scheme, and minimize changes in power system frequency and/or voltages and avoid large disturbances during...
Selection of the DG interconnection protective relay is based on several criteria such as power system characteristics, the dynamic response of the generator, the system grounding, the DG transformer connection, etc., as well as the protection policy of the utility and coordination requirements. The interconnection protection IED design can be summarized as follows: Disconnection of DG plants when...
The basic concept of redundancy is simple. Instead of relying on a single piece of equipment, there are duplicate or triplicate sets that perform the same function. Consequently, if one piece of equipment fails, the function will still be performed by a redundant device. Redundancy of components plays a major role in elevating the reliability of protection systems. The impact on the power system when...
The double circuit or parallel transmission lines are more and more widely used in modern power system to improve transmission capability and reliability. Many types of relaying protection techniques can be used to protect parallel double transmission lines, such as over-current relay, distance relay and pilot relay[1]. Current and distance relays do not need communication channel but can not operate...
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