What is a Power Conversion System PCS?

Application 2024-03-14

The transition to renewable energy makes it harder than ever to provide energy reliably where and when it is required, considering the enormous quantity of energy consumed in today’s modern world and government goals to reduce carbon emissions. As a result, there is a growing need for energy storage devices. The power conversion system (PCS) is a crucial element of any effective energy storage system (ESS). Between the DC batteries and the electrical grid, the PCS serves as an interface.

How does a PCS work?

To achieve the bidirectional conversion of electric energy, a power conversion system is a component connected between the energy storage battery system and the power grid. The PCS charges the batteries in the event of excessive power generation. The PCS provides the power with the stored energy if the grid need extra energy.

AC/DC bidirectional converters, control elements, switching components, and cooling compose a power conversion system. There are many layers of remote control for the system. This is designed to regulate the battery’s charge or discharge, as well as the grid’s active and reactive power. In order to obtain information about the state of the battery pack and cells, the PCS can simultaneously connect with the battery management system (BMS) using a number of interfaces and protocols (RS-485, CAN, Fibre-Optics, Ethernet). As a result, the battery can be charged and discharged safely, and the energy storage system can run without interruption.

How is a PCS integrated in an energy storage system?

The block drawing has been streamlined. Renewable energy embedded systems may become exceedingly complex. We can construct entire systems or standalone devices thanks to our modular designs and wide range of ratings.

Where are the suitable points for energy metering?

●We recommend having bidirectional energy meters on DC-side and AC-side of the power conversion system. This gives an indication for the conversion losses.

For billing purpose, a bidirectional CT/PT meter is installed at the transformer station.

Additional meters at the PCS can be for generated solar- and wind power.

Our PCS Certifications (selection)

TPSF12C3—Common-mode active EMI filter (AEF) for three-phase systems

UCC5350—3kVrms, 5A/5A single-channel isolated gate driver with miller clamp or split out & 8V or 12V UVLO

LMG3411R070—600-V 70-mΩ GaN with integrated driver and cycle-by-cycle overcurrent protection

UCC27624—5-A/5-A dual-channel gate driver with 4-V UVLO, 30-V VDD and low prop delay

UCC27712—1.8-A/2.8-A, 620V half bridge driver with interlock

UCC21550— 4-A/6-A, 5-kVRMS dual-channel isolated gate driver with DIS and DT pins for IGBT

LMG3411R070—600-V 70-mΩ GaN with integrated driver and cycle-by-cycle overcurrent protection

UCC28911—700V Flyback switcher with constant-voltage constant-current and primary-side regulation

ISO6762—General purpose, 50-Mbps, six-channel (4/2) digital isolator

CSD19536KTT—100-V, N channel NexFET™ power MOSFET, single D2PAK, 2.4 mOhm

MSP430FR6007—16-MHz MCU with 256-KB FRAM, LCD, 12-bit high speed 8-MSPS sigma-delta ADC and integrated sensor AFE

TPSF12C3—Common-mode active EMI filter (AEF) for three-phase systems

TPS25730—Sink-only USB Type-C® and USB Power Delivery (PD) controller with no firmware development required

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