Learn More
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)
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)
This paper describes methods that a distribution engineer could use to determine advanced inverter settings to improve distribution system performance. These settings are for fixed power factor, volt-var, and volt-watt functionality. Depending on the level of detail that is desired, different methods are proposed to determine single settings applicable 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)
Photovoltaic (PV) distributed energy resources (DER) have reached approximately 27 GW in the U.S., and the solar penetration rate continues to increase. This growth is expected to continue, causing challenges for grid operators who must maintain grid stability, reliability, and resiliency. To minimize adverse effects on the performance of electrical power(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)
While solar variability has often been quantified and its impact to distribution grids simulated, load variability, especially high-frequency (e.g., 1-second) load variability, has been given less attention. The assumption has often been made that high-frequency load variability is much smaller than PV variability, but with little evidence. Here, we compare(More)