POWER ELECTRONICS€¦ · 1.06 1.08 1.04 1.02 0.98 0.96 0.94 0.92 Voltage at POI TIME VOLTAGE Voltage at POI with VRS activated 27 Freemaq PCSM series helps the integration of renewable

POWER ELECTRONICS

21

FREEMAQ PCSM FREEMAQ MULTI PCSM

THE INNOVATIVE MEDIUM VOLTAGE CENTRAL STRING BATTERY INVERTER

UTILITY SCALE MV BATTERY INVERTER

The Power Electronics PCSM medium voltage battery inverter is designed for utility scale storage applications, that require the advantages of a central inverter solution but also the modularity of a string architecture. The PCSM can reach up to a nominal power of 3.6 MVA and it is compatible with all battery technology and manufacturers. It also has the added advantage of having an integrated medium voltage transformer and switchgear.

The MULTI PCSM can support two or three independent battery systems and optimize the storage facility.

Power Electronics converters have been designed to be the lowest LCOE solution in the market for storage applications. The Power Electronics Freemaq PCSM offers proven hardwa-re to meet storage and grid support challenges.The energy production industry is embracing renewable energy sources. However, high penetration creates power transmission instability challenges, thus Grid Operators require stringent dynamic and static grid support features for solar inverters and Power Conversion Systems (PCS).

The converters can perform grid support functions such as: Peak Shaving, Ramp Rate Control, Frequency Regulation, Load Leveling and Voltage Regulation, controlled by a Power Plant Controller or SCADA. The Freemaq PCSM stations are turn-key solutions ready for connection to the battery contai-ner and MV power distribution wiring. Units are designed for concrete pads or piers.

POWER CONVERSION SYSTEM

ICOOL 3

4 QUADRANT

3 LEVEL TOPOLOGY

FIELD REPLACEABLE UNITSFRU

MODULAR DESIGN

NEMA 3R

UP TO 3 INDEPENDENT BESS INPUTS

POWER ELECTRONICS

STRING CONCEPT POWER STAGES

The Freemaq PCSM combines the advantages of a central inverter with the modularity of the string inverters. Its power stages are designed to be easily replaceable on the field without the need of advanced technical service personnel, providing a safe, reliable and fast Plug&Play assembly system. Following the modular philosophy of the Freemaq series, the unit is composed of 6 FRUs (field replaceable units).

MVSWITCHGEAR

MVTRANSFORMER

DCRECOMBINER

STRING INVERTERCABINETS

REAL TURN-KEY SOLUTION - EASY TO SERVICE

With the PCSM, Power Electronics offers a real turn-key solution, including the MV transformer and switchgear fully assembled and tested at the factory. The PCSM is a compact turn-key solution that will reduce site design, installation and connection costs, and therefore will minimize the LCOE.

By providing full front access the PCSM series simplifies the maintenance tasks, reducing the MTTR (and achieving a lower OPEX). The total access allows a fast swap of the FRUs without the need of qualified technical personnel.

23FREEMAQ PCSM & MULTI PCSM

ACTIVE HEATING

When the unit is not actively exporting/importing power, the inverter can import a small amount of power to keep the inverter internal ambient temperature above -20°C, without using external resistors.

This autonomous heating system is the most efficient and homogeneous way to prevent condensation, increasing the inverters availability and reducing the maintenance. PATENTED

INNOVATIVE COOLING SYSTEM

Based on more than 3 years of experience with our MV Variable Speed Drive, the iCOOL3 system allows to get NEMA 3R degree of protection in an outdoor converter. iCOOL3 delivers a constant stream of clean air to the FRUs, being the most effective way of reaching up to NEMA 3R degree of protection, without having to maintain cumber-

some dust filters or having to use liquid-cooling systems, avoiding the commonly known inconveniences of it (complex maintenance, risk of leaks, higher number of components…), therefore resulting in an OPEX cost reduction and a LCOE improvement.

POWER ELECTRONICS

EASY TO MONITOR

The Freesun app is the easiest way to monitor the status of our inverters. All our inverters come with built-in wifi, allowing remote connectivity to any smart device for detailed updates and information without the need to open cabinet doors.

The app user friendly interface allows quick and easy access to critical information (energy registers, production and events).

AVAILABLE INFORMATION Grid and DC side data.Inverter and Power module data (Vol-tages, currents, power, temperatures, I/O status...).Weather conditions.Alarms and warnings events.Energy registers.Others.

FEATURES Easy Wireless connection.Comprehensive interface.Real time data.Save and copy settings.

LANGUAGE English, Spanish.

SYSTEM REQUIREMENTS iOS or Android devices.

SETTINGS CONTROL Yes

The multilevel IGBT topology is the most efficient approach to manage high DC link voltages and makes the difference in the 1500 Vdc design. Power Electronics has many years of power design in both inverters and MV drives and the

MULTILEVEL TOPOLOGY

Freemaq PCSM design is the result of our experience with 3 level topologies. The 3 level IGBT topology reduces stage losses, increases inverter efficiency and minimizes total harmonic distortion. High efficiency to deliver the lowest LCOE.

TWO-LEVEL INVERTER

TIME (s) TIME (s)

VOLT

AGE

(V)

VOLT

AGE

(V)

THREE-LEVEL INVERTERTWO-LEVEL INVERTER

TIME (s) TIME (s)

VOLT

AGE

(V)

VOLT

AGE

(V)

THREE-LEVEL INVERTER

OTHER INVERTER POWER ELECTRONICS SOLUTION

25

DYNAMIC GRID SUPPORT

Freemaq PCSM firmware includes the latest utility interactive features (LVRT, OVRT, FRS, FRT, Anti-islanding, active and reactive power curtailment…), and can be configured to meet specific utility requirements.

SLOW

FAST

FAST

SLOW

TIME (s)

FREQ

UEN

CY (H

z)

ISLANDING CONDITION

PV array Freesuninverter

R L C Loads

Transformer

POI

Grid

Utilitybreaker

ISLANDING CONDITION

Inverter

R L C Loads

Transformer

POI

Grid

Utilitybreaker

1.2

1.4

1

0.8

0.6

0.4

0.2

0

-1 0 1 2 3 4

BDEWPO12.3 CEI-016PREPA HECO

FULL VOLTAGE RIDE THROUGH COMPATIBILITY

SECONDS

p.u.

VOL

TAGE

PV INVERTER LOAD (%)

FREQUENCY (Hz)50Hz

0 %

50%

100%

52Hz

1.2

1.4

1

0.8

0.6

0.4

0.2

0

-1 0 1 2 3 4

BDEWPO12.3 CEI-016PREPA HECO

FULL VOLTAGE RIDE THROUGH COMPATIBILITY

SECONDS

p.u.

VOL

TAGE

PV INVERTER LOAD (%)

FREQUENCY (Hz)50Hz

0 %

50%

100%

52Hz

Frequency Ride Through (FRT). Freesun solar inverters have flexible frequency

protection settings and can be easily adjusted to comply with future requirements.

Anti-islanding. This protection combines passive and active detection

methods that eliminate nuisance tripping and allow to comply with the IEC

62116 and IEEE 1547 standards.

Frequency Regulation System (FRS). Frequency droop algorithm curtails the

active power along a preset characteristic curve supporting grid stabilization.

Q P V

EXAMPLE: Q(U)1.2

1.1

1

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

1 125 250 375 500 625 750 875 1000-0.1

1.11

1.1

1.105

1.095

1.09

1.085

1.08

1.075

1.07

1.065

1.06

1.055

1.05

1.045

Time (s)

Activ

e an

d Re

activ

e Po

wer

Volta

ge

VOLTAGE STEP 1

VOLTAGE STEP 2

P>0.2Pn(lock in)

P>0.5Pn(lock out)

Q(U)

U

Q(max)

-Q(max)

Qmax(cap)

Qmax(ind)

Q P V

EXAMPLE: Q(U)1.2

1.1

1

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

1 125 250 375 500 625 750 875 1000-0.1

1.11

1.1

1.105

1.095

1.09

1.085

1.08

1.075

1.07

1.065

1.06

1.055

1.05

1.045

Time (s)

Activ

e an

d Re

activ

e Po

wer

Volta

ge

VOLTAGE STEP 1

VOLTAGE STEP 2

P>0.2Pn(lock in)

P>0.5Pn(lock out)

Q(U)

U

Q(max)

-Q(max)Qmax(cap)

Qmax(ind)

Q(V) curve. It is a dynamic voltage control function which provides reactive power in order to maintain the voltage as close as possible to its nominal value.

Low Voltage Ride Through (LVRT or ZVRT). Inverters can withstand any

voltage dip or profile required by the local utility. In this situation, the inverter

can inject current up to the nominal value.

FREEMAQ PCSM & MULTI PCSM

PO

WE

R

TIME

STORAGE BATTERY SYSTEM

System load Storage battery system

Peak hours

Discharging

Charging Charging

2000

1800

1600

1400

1200

1000

800

600

400

200

0

-200

-400

-600

-800

kW

Solar Production (kW)Active Power at POI (kW)

Battery Discharge (kWh)Battery Charge (kWh)

TIME

OU

TP

UT

TIMEPV inverter production Utility curtailment

Charging

Charging

P(k

W)

TIMECharging PV power available Inverter power limit

f(H

z)

50.02

50.04

50.00

49.98

TIMECharging Discharging Grid load

OU

TP

UT

TIMECompany Load

Discharging

ChargingCharging

Maximum powercontracted by the customer

PO

WE

R

TIME



Peak hours

Discharging

Charging Charging

2000

1800

1600

1400

1200

1000

800

600

400

200

0

-200

-400

-600

-800

kW



TIME

OU

TP

UT


Charging

Charging

P(k

W)


f(H

z)

50.02

50.04

50.00

49.98


OU

TP

UT

TIMECompany Load

Discharging

ChargingCharging


PO

WE

R

TIME



Peak hours

Discharging

Charging Charging

2000

1800

1600

1400

1200

1000

800

600

400

200

0

-200

-400

-600

-800

kW



TIME

OU

TP

UT


Charging

Charging

P(k

W)


f(H

z)

50.02

50.04

50.00

49.98


OU

TP

UT

TIMECompany Load

Discharging

ChargingCharging


POWER ELECTRONICS

ENERGY STORAGE APPLICATIONS

Freemaq PCSM series are able to store energy during periods of low demand from the grid, in order to later supply this energy when there is a higher demand. This has the bene-fit of selling the energy at a higher market price during peak periods. It also allows grid operators to supply electricity with a higher renewable origin. Since PV generation may not be at the same time as peak demand, this facilitates the flexibility and integration of renewable generation into the grid.

The Freemaq PCSM series attenuates the intermittent nature of renewable energy sources, to provide a smoother power output. The Freemaq PCSM controls the ramp rate at which power is injected into the grid, and thus reduces the impact of rapid power fluctuations due to sudden or transient conditions experienced by the PV array. The system monitors the PV inverter output to inject or consume power accordingly to ensure the output remains within the ramp requirements.

LOAD LEVELING

RENEWABLE INTEGRATION

PEAK POWER SHAVING

By delivering stored energy to the grid during periods of high demand, it reduces the burden on the distribution network and increases significantly its efficiency. Energy is stored instead of injected into the grid during periods of low demand, which as a result increases the load on the grid. However, during peak periods this stored energy is then injected into the grid, which reduces the demand at this time. The result is a more flattened demand curve which means the grid can avoid switching on more expensive and polluting generators.

PO

WE

R

TIME



Peak hours

Discharging

Charging Charging

2000

1800

1600

1400

1200

1000

800

600

400

200

0

-200

-400

-600

-800

kW



TIME

OU

TP

UT


Charging

Charging

P(k

W)


f(H

z)

50.02

50.04

50.00

49.98


OU

TP

UT

TIMECompany Load

Discharging

ChargingCharging


1.06

1.08

1.04

1.02

0.98

0.96

0.94

0.92

Voltage at POI

TIME

VO

LTA

GE

Voltage at POI with VRS activated

27

Freemaq PCSM series helps the integration of renewable sources, by helping to maintain grid stability and power quality. It can help support the grid voltage by generating capacitive or inductive current.Other features include Voltage Control, Reactive Power Control and Fault Ride Through Support.

GRID SUPPORT

FREQUENCY REGULATION SYSTEM

Freemaq PCSM provides ability to regulate grid frequency in both directions. When there is a grid overfrequency (generation>demand) inverter power output is curtailed and this energy is stored through charging batteries. When there is a grid under-frequency (generation<demand) inverter power output is increased by discharging the batteries and injecting more power to the grid.


POWER ELECTRONICS

BATTERY ENERGY STORAGE SYSTEM

A BESS comprises a battery container connected to a Freemaq PCSM (Power Conversion System) that follows the instruction of the main governor of the plant, the PPC (Power Plant Controller) or SCADA.

EXAMPLE 1

Power connections

Plant communications

Grid controller communication

29

EXAMPLE 2

Power connections




POWER ELECTRONICS

TECHNICAL CHARACTERISTICS FREEMAQ PCSM

REFERENCE FP3510MAC AC Output Power(kVA/kW) @50°C [1] 3510

AC Output Power(kVA/kW) @40°C [1] 3630Operating Grid Voltage(VAC) 34.5kV ±10%Operating Grid Frequency(Hz) 60HzCurrent Harmonic Distortion (THDi) < 3% per IEEE519Power Factor (cosine phi) [2] 0.5 leading … 0.5 lagging adjustable Reactive power compensation Four quadrant operation

DC DC Voltage Range [3] 934V-1500VMaximum DC voltage 1500VDC Voltage Ripple < 3%Max. DC continuous current (A) 3970Max. DC shortcircuit current (A) 180kA / 5msBattery technology All type of batteries (BMS required)Battery connections Up to 64 positive and 64 negative connections (2 cables per terminal)

EFFICIENCY & AUXILIARY SUPPLY Max. Efficiency PAC, nom (η) [4] 97.80% including MV transformerCEC (η) [4] 97.51% including MV transformerMax. Power Consumption (KVA) 20

CABINET Dimensions [WxDxH] (ft) 21.7 x 7 x 7Dimensions [WxDxH] (m) 6.6 x 2.2 x 2.2Weight (lb) 30865Weight (kg) 14000Type of ventilation Forced air cooling

ENVIRONMENT Degree of protection NEMA 3RPermissible Ambient Temperature -35°C to +60°C / >50°C Active Power deratingRelative Humidity 4% to 100% non condensingMax. Altitude (above sea level) [5] 2000mNoise level [6] < 79 dBA

CONTROL INTERFACE Communication protocol Modbus TCPPlant Controller Communication OptionalKeyed ON/OFF switch Standard

PROTECTIONS Ground Fault Protection Isolation monitoring device General AC Protection MV Switchgear (configurable)General DC Protection DC switch [7]

Overvoltage Protection AC, DC Inverter and auxiliary supply type 2CERTIFICATIONS Safety UL1741, CSA 22.2 No.107.1-16

Compliance NEC 2017Utility interconnect UL 1741 SA - Feb. 2018, IEEE 1547.1-2005

[1] Values at 1.00•Vac nom and cos Ф= 1. Consult Power Electronics for derating curves.[2] Consult P-Q charts available: Q(kVAr)=√(S(kVA)2-P(kW)2).

[3] Consult Power Electronics for derating curves.[4] Consult Power Electronics for the extended DC voltage range option efficiency data.

[5] Consult Power Electronics for altitudes above 1000m.[6] Readings taken 1 meter from the back of the unit.[7] Battery short circuit disconnection has to be done on the battery side.

31





AC Output Power(kVA/kW) @40°C [1] 3550Operating Grid Voltage(VAC) 34.5kV ±10%Operating Grid Frequency(Hz) 60HzCurrent Harmonic Distortion (THDi) < 3% per IEEE519Power Factor (cosine phi) [2] 0.5 leading … 0.5 lagging adjustableReactive power compensation Four quadrant operation











POWER ELECTRONICS















33
















POWER ELECTRONICS



AC Output Power(kVA/kW) @40°C [1] 3300Operating Grid Voltage(VAC) 34.5kV ±10%Operating Grid Frequency(Hz) 60HzCurrent Harmonic Distortion (THDi) < 3% per IEEE519Power Factor (cosine phi) [2] 0.5 leading … 0.5 lagging adjustable Reactive power compensation Four quadrant operation













FRONT VIEW

BACK VIEW

POWER ELECTRONICS

MULTI BATTERY ENERGY STORAGE SYSTEM

The Freemaq MULTI PCSM can support two or three independent battery systems. A BESS comprises a battery containers connected to a Freemaq MULTI PCSM (Power Conversion System) that follows the instruction of the main governor of the plant, the PPC (Power Plant Controller) or SCADA.

Power connections



EXAMPLE 1

37

Power connections



EXAMPLE 2


POWER ELECTRONICS

REFERENCE FP3510M 2 FP3510M3AC AC Output Power(kVA/kW) @50°C [1] 3510


DC DC Voltage Range [3] 934V-1500VMaximum DC voltage 1500VDC Voltage Ripple < 3%Max. DC continuous current (A) 3970Max. DC shortcircuit current (A) 180kA / 5msBattery technology All type of batteries (BMS required)Number of separate DC inputs 2 3








TECHNICAL CHARACTERISTICS FREEMAQ MULTI PCSM




39

REFERENCE FP3430M 2 FP3430M 3AC AC Output Power(kVA/kW) @50°C [1] 3430















POWER ELECTRONICS















41

REFERENCE FP3270M2 FP3270M3AC AC Output Power(kVA/kW) @50°C [1] 3270















POWER ELECTRONICS
















FRONT VIEW

BACK VIEW

Documents

POWER ELECTRONICS€¦ · 1.06 1.08 1.04 1.02 0.98 0.96 0.94 0.92 Voltage at POI TIME VOLTAGE Voltage at POI with VRS activated 27 Freemaq PCSM series helps the integration of renewable