CSU Architecture

COMPISO Sys­tem Unit (CSU) a uni­ver­sal con­fig­urable P-HIL test bench sys­tem con­sists the fol­low­ing archi­tec­ture ele­ments:
The 3 phase sup­ply­ing grid is con­nect­ed by 100kVA – 2MVA iso­lat­ing grid trans­former to pro­vide poten­tial free pow­er to CSU.
With this trans­former the sys­tem can be adapt­ed to any 3 phase pow­er grid volt­age from 400V to 690V and 50/60 Hz.
Togeth­er with the bidi­rec­tion­al Grid Invert­er it forms the so called Grid Sec­tion. The Grid Invert­er con­verts the vary­ing AC Volt­age in to a con­trolled DC Volt­age (DC-Link) 750VDC@full load. It can source or sink ener­gy from or to the grid depend­ing on how the CSU works over­all. The grid sec­tion defines and lim­its the max­i­mum pow­er which can be sourced or sank from/to the grid.
This is per­fect­ly bal­anced con­nect­ed the COMPISO dig­i­tal ampli­fiers (CDAs) block. In var­i­ous con­fig­u­ra­tions CDAs turn the cal­cu­lat­ed HIL or appli­ca­tion mod­els into the expect­ed wave­forms and pow­er. Free selec­table con­fig­u­ra­tions of sin­gle CDAs allow to cre­ate DC, AC 1phase, AC 3phase with and with­out Neu­tral and any com­bi­na­tions of it.

Pre­cise mea­sure­ments of volt­age and cur­rent on each CDA out­put enables real time closed loop con­trol. COMPISO SCADA PC is an inte­grat­ed part of the COMPISO Sys­tem Unit.

The COMPISO SCADA (Super­vi­so­ry Con­trol and Data Acqui­si­tion) Sys­tem ful­fils the fol­low­ing roles:

  • Sys­tem Con­fig­u­ra­tion
  • Sys­tem Para­me­ter­i­za­tion
  • Sys­tem Online Oper­a­tion
  • Sys­tem Mon­i­tor­ing and will be han­dled by a graph­ic user inter­face (GUI).

A COMPISO sys­tem unit is fail­safe designed cov­ered by the fol­low­ing safe­ty items inside each CDA and CSU cab­i­net:

  • Over­cur­rent pro­tec­tion
  • Over­volt­age pro­tec­tion (VDC_LINK, VOUT)
  • Dew point detec­tion on the water cool­ing rail
  • Tem­per­a­ture Alarm­ing (air, pow­er semi­con­duc­tors, cool­ing rail) Emer­gency OFFDoor Open shut down
  • Fast Dis­charge of DC-Link Capac­i­tors
  • Shut OFF Input & Out­put Switch­es
  • Exter­nal Safe­ty Con­nec­tions (con­nect­ed to inter­nal Safe­ty PLC)
  • Tem­per­a­ture in Cab­i­net
  • Water Pres­sure

Option­al­ly a CSU can be equipped by SIL (Safe­ty Integri­ty Lev­el 2 or 3) com­po­nents, Real­time HIL proces­sors and cus­tom designed out­put matrix­es to cre­ate tai­lor made solu­tions.

 

Compiso Digital Amplifier CDA

The COMPISO Dig­i­tal Ampli­fi­er (CDA) is the heart of every COMPISO solu­tion. Designed as a 4Q-Pow­er Ampli­fi­er, CDA works as a 6 legs inter­leav­ing buck-boost con­vert­er with cou­pled induc­tors. Every leg switch­es at rate of approx. 21 kHz, so the effec­tive switch­ing fre­quen­cy results into 125 kHz. The pow­er ampli­fi­er is well opti­mized for high dynam­ics, wide band­width and low laten­cy.

It is fail safe and sends warn­ings when para­me­ters exceed warn­ing lev­els. Fur­ther­more, it switch­es auto­mat­i­cal­ly off when dan­ger­ous con­di­tion lev­els are exceed­ed. To build it as com­pact as pos­si­ble the CDA is water cooled. A CDA pro­vides a full span out­put volt­age up to 5 kHz. More­over, with reduced ampli­tude, up to 15 kHz is avail­able at the out­put, too.

COMPISIO Dig­i­tal Ampli­fi­er is dri­ven by dig­i­tal set points for volt­age and cur­rent with a set point fre­quen­cy of 250 kHz. The dig­i­tal input sig­nals will be turned by CDA into prop­er ana­logue out­put sig­nals with an excel­lent THD. The low trans­port delay between dig­i­tal set point sig­nal and PWM gen­er­a­tion of 4μsec only per­mits high speed closed loop con­trols.

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CSU100-1GAMP4

A 100 kVA COMPISO Sys­tem Unit (CSU) con­sist­ing of one group of 4 COMPISO Dig­i­tal Ampli­fi­er (CDA) can be con­nect­ed and con­trolled in var­i­ous 4 Ampli­fi­er sys­tem con­fig­u­ra­tions. This high flex­i­bil­i­ty makes it future-proof even if some of these con­fig­u­ra­tions are cur­rent­ly not need­ed. For each con­fig­u­ra­tion datasets to the CDAs will be pro­vid­ed by COMISO SCADA.

Pos­si­ble con­fig­u­ra­tions are:

  • Free Amp Mode: each of the 4 ampli­fiers is used inde­pen­dent­ly
  • AC sym­met­ri­cal 1~ Mode: 2 ampli­fi­er groups of 2 par­al­leled ampli­fiers each are used to gen­er­ate 1~ AC between its out­puts
  • AC 3~ + N Mode: 3 ampli­fiers gen­er­ate a 3 phase sys­tem the 4th ampli­fi­er is used for a neu­tral line
  • DC unipo­lar Mode: 1 up to 4 ampli­fiers are par­al­leled to gen­er­ate a DC vs. DC Minus (-)
  • DC bipo­lar Mode: 2 ampli­fiers groups of 2 par­al­leled ampli­fiers each gen­er­ate a +/- DC between their out­puts

All these con­fig­u­ra­tions are either work as a source with a load con­nect­ed to the out­puts or as a sink to load an exter­nal source for ful­ly flex­i­ble bidi­rec­tion­al sink-source com­bi­na­tions.

 

CSU100-2GAMP4

A 100 kVA COMPISO Sys­tem Unit (CSU) con­sist­ing of 2 groups of 4 COMPISO Dig­i­tal Ampli­fi­er (CDA) each can be con­nect­ed and con­trolled in var­i­ous 4 Ampli­fi­er sys­tem con­fig­u­ra­tions. This high flex­i­bil­i­ty makes it future-proof even if some of these con­fig­u­ra­tions are cur­rent­ly not need­ed. For each con­fig­u­ra­tion datasets to the CDAs will be pro­vid­ed by COMISO SCADA.

Pos­si­ble con­fig­u­ra­tions are:

  • Free Amp Mode: each of the 4 ampli­fiers is used inde­pen­dent­ly
  • AC sym­met­ri­cal 1~ Mode: 2 ampli­fi­er groups of 2 par­al­leled ampli­fiers each are used to gen­er­ate 1~ AC between its out­puts
  • 2 x AC sym­met­ri­cal 1~ Mode: Two CDAs each are used to gen­er­ate 2 inde­pen­dent bipo­lar sin­gle phase sym­met­ri­cal AC out­put sig­nals. Load is con­nect­ed between CDA 1 and 2 and between CDA 3 and 4 out­puts.
  • AC 3~ + N Mode: 3 ampli­fiers gen­er­ate a 3 phase sys­tem the 4th ampli­fi­er is used for a neu­tral line
  • DC bipo­lar Mode: 2 ampli­fiers groups of 2 par­al­leled ampli­fiers each gen­er­ate a +/- DC between their out­puts
  • DC unipo­lar Mode: Up to four CDAs par­al­leled are used to gen­er­ate a unipo­lar DC out­put sig­nal. Load is con­nect­ed between CDA out­puts and DC minus.

All these con­fig­u­ra­tions are either work as a source with a load con­nect­ed to the out­puts or as a sink to load an exter­nal source for ful­ly flex­i­ble bidi­rec­tion­al sink-source com­bi­na­tions.

 

CSU200-1GAMP6

A 200 kVA COMPISO Sys­tem Unit (CSU) is the basic 6 Ampli­fi­er Test bench sys­tem for mul­ti-pur­pose use. The CSU 200 con­sists of one group of 6 COMPISO Dig­i­tal Ampli­fi­er (CDA). These can be con­nect­ed and con­trolled in var­i­ous sys­tem con­fig­u­ra­tions. This high flex­i­bil­i­ty makes it future-proof even if some of these con­fig­u­ra­tions are cur­rent­ly not need­ed. For each con­fig­u­ra­tion datasets to the CDAs will be pro­vid­ed by COMISO SCADA.

A selec­tion of pos­si­ble con­fig­u­ra­tions are:

  • Free Amp Mode: each of the 6 ampli­fiers is used inde­pen­dent­ly -AC sym­met­ri­cal 1~ Mode: 2 ampli­fi­er groups of 3 par­al­leled ampli­fiers each are used to gen­er­ate 1~ AC between its out­puts
  • AC 3~ + N Mode: 3 ampli­fiers gen­er­ate a 3 phase sys­tem the oth­er 3 ampli­fi­er are par­al­leled and used for a high pow­er neu­tral line
  • DC unipo­lar Mode: 1 up to 6 ampli­fiers are par­al­leled to gen­er­ate a high pow­er DC vs. DC Minus (-)
  • DC bipo­lar Mode: 2 ampli­fiers groups of 3 par­al­leled ampli­fiers each gen­er­ate a +/- DC between their out­puts
  • Option­al 3~ Trafo N: Three times two CDA out­puts dri­ve the pri­ma­ry trans­former wind­ings of 3 sin­gle phase trans­form­ers with up to 500VAC. Sec­ondary trans­former wind­ings can be con­nect­ed to 3 phase + neu­tral sys­tem. Sec­ondary trans­former volt­age can be cus­tomized designed.

All these and many more con­fig­u­ra­tions are either work as a source with a load con­nect­ed to the out­puts or as a sink to load an exter­nal source for ful­ly flex­i­ble bidi­rec­tion­al sink-source com­bi­na­tions.

Mul­ti­ple CSU 200kVA sys­tems can be grouped and par­al­leled to cre­ate out­put pow­er up to 2MVA.