Matthew J. Reno

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When inverters in voltage control mode are paired with synchronous generators (SGs), they exhibit poor transient load sharing in islanded operation. It is well known that power electronics respond more quickly where the inverter initially picks up the majority of every load step, and the generator's output slowly increases until they reach their(More)
As the penetration level of PV on the distribution system grows, the current injection by PV can create over-voltage issues around the location of the interconnection of PV. Often, the voltage regulation in the feeder is not setup to handle these reverse current flows and inverse feeder voltage profile shape. The PV inverter can be used to absorb or inject(More)
Many utilities today have a large number of interconnection requests for new PV installations on their distribution networks. Interconnections should be approved in a timely manner but without compromising network reliability. It is thus important to know a network’s PV hosting capacity, which defines the upper bound of PV sizes that pose no risk to the(More)
High penetrations of PV on the distribution system can impact the operation of the grid and may require interconnection studies to prevent reliability problems. In order to improve the interconnection study process, the use of feeder zones and PV impact signatures are proposed to group feeders by allowable PV size as well as by their limiting factors for(More)
With increasing connections of distributed rooftop PV to the distribution system, a method for simplifying the complex system to an equivalent representation of the feeder is useful to streamline the interconnection impact studies. This paper presents a method of reducing feeders to specified buses of interest while retaining equivalent electrical(More)
Operating distribution systems with a growing number of distributed energy resources requires accurate feeder models down to the point of interconnection. Many of the new resources are located in the secondary low-voltage distribution circuits that typically are not modeled or modeled with low level of detail. This paper presents a practical and(More)
The research presented in this paper compares five real-time control strategies for the power output of a large number of distributed PV systems in a large distribution feeder circuit. Both real and reactive power controls are considered with the goal of minimizing network over-voltage violations caused by high penetrations of PV generation. The control(More)
Utilities issuing new PV interconnection permits must be aware of any risks caused by PV on their distribution networks. One potential risk is the degradation of the effectiveness of the network’s protection devices (PDs). This can limit the amount of PV allowed in the network, i.e. the network’s PV hosting capacity. This research studies how the size and(More)