IEEE Power & Energy Magazine - May/June 2014 - 88

We have described a utility-scale, grid-friendly
PV power plant that incorporates advanced capabilities
essential to supporting grid stability and reliability.

in this article, we describe our design of a grid-friendly
pv plant, including the development of a plant controller
that complies with these requirements, resulting in a pv
plant that actively contributes to the reliability and stability of electrical transmission and distribution system. Field
data from First Solar-developed utility-scale pv plants are
used to illustrate the concepts. the grid-friendly pv plant
also includes the ability to ride through specific low and high
voltages or low- and high-frequency ranges.

A task force under the aegis of the north American electric
Reliability corporation (neRc) has made several recommendations on specific requirements that such variable generation
plants must meet to provide their share of grid support. these
recommendations address grid requirements such as voltage
control and regulation, voltage and frequency fault ride-through,
reactive and real power control, and frequency response criteria
in the context of the technical characteristics and physical capabilities of variable-generation equipment.

Substation

POI Measurements
POI Voltage,
Current, and Frequency

Substation RTU

SCADA HMI

Plant Controller
Set Points

Set Points

RTU Data

HMI Data
Set Points (Power,
Voltage, or PF)

Plant Network

PCS 1

Inverter Commands

PCS n
DAS/PLC

Inverter 1
Legend

Inverter 2

DAS/PLC

Inverter 1

Inverter 2

DAS

Data Acquisition System

HMI Human-Machine Interface

PCS

Power Conversion Station

PLC Programmable Logic Controller

POI

Point of Interconnection

RTU Remote Terminal Unit

SCADA Supervisory Control and Data Acquisition System

figure 1. A plant control system and interfaces to other components.
88

ieee power & energy magazine

may/june 2014



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - May/June 2014

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IEEE Power & Energy Magazine - May/June 2014 - Cover3
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