ACTIVE VOLTAGE STABILIZER

Transcription

1 ACTIVE VOLTAGE STABILIZER CONDO D

2 OSKαR powered by Condensator Dominit CHALLENGE Prodction down time are in 92% of the cases cased by voltage dips. The depth of voltage dips depends on the network topology and the distance from Freqent cases of voltage dips are short circits in the transmission & distribtion the falt location. Almost all voltage dips are leaving the remaining voltage greater than 40 %. 2) grid or falts in the cstomer s eqipment. The dration of voltage dips is often depending on the response time of the protection Qantity and depth of voltage dips differs strongly depending on region and season of the year. 2) eqipment, e.g. Distance relay. The typical dration is greater than 20 ms and less than 1 second. 2) Cases of voltage dips in the transmission and distribtion network 1) 1) Based on EPRI, Electric Power Research Institte, Palo Alto CA 2) Sorce: EN 50160, Voltage characteristics of electricity spplied by pblic distribtion networks, Edition Febrary

3 online-spply-correction with adaptive reglation SOLUTION The most important prodction factor is the electrical power, OSKαR redces significantly the risks of improper power qality: Prevention of prodction downtimes and downtime expenses Redction of maintenanceand repair costs Effective redction of setp costs and reject rates Ensring of qality and reprodcibility Compliance with prodction criteria for indstrial goods and testing gidelines Contactors / relays may drop ot dring a voltage dip of more than 20 % for more Triggering of circit breakers than 20 ms (EN ). de to startp crrents when spply voltage retrns. fotolia.com As per the EPRI stdy, the PLC Systems cold fail if the voltage falls below 75 % of nominal voltage for more than 50 ms. Freqency converters can already stop operating at 85 % residal voltage (EPRI). 03

4 OSKαR powered by Condensator Dominit Voltage and phase correction... in real time INPUT OUTPUT 40 % correction capability 3-phase Voltage correction % -20 % +10 % -10 % -20 % -30 % -40 % -50 % OUTPUT 60 % correction capability 1-phase INPUT Measrement Half cycle RMS OUTPUT Continos control range... min. ± 10 % +10 % +10 % -10 % -10 % INPUT OUTPUT 04

5 online-spply-correction with adaptive reglation OSKαR PERFORMANCE FEATURES ± 10% continos correction capability Highly scalable Modlar system, adaptable for reqired power levels Short circit power remains nchanged No adjstment of protection Cstomized otpt voltages available eqipment reqired System power extension throgh parallel connection Robst overload capability 150% overloading for Flexible adaption of short circit capability approx. 30 seconds Economical soltion No battery storage reqired = very low maintenance costs Very high Efficiency = very low operating costs + = 300 kva kva = 600 kva fotolia.com 05

6 OSKαR powered by Condensator Dominit OSKαR INSTALLATION OSKαR is connected in series between the pstream distribtion transformer and the eqipment. Overload and short circit settings of the pstream circit breaker can be adjsted as sal corresponding to the rated power of OSKαR. OSKαR The protection of the loads remains sally nchanged, becase of the minimal changes of the short circit crrent. Loads OSKαR BASIC SETUP OSKαR is delivered in one or more standard control cabinets. The basic setp consists of the components rectifier, inverter with integrated overloadable bypass, short circit protection and the serial transformer. This combination and the elaborated interaction are ensring a very high level of spply secrity, an optimal voltage qality and therefore the best possible conditions for sophisticated eqipments and prodction processes. As additional safety featres, OSKαR is eqipped with an overvoltage protection and depending on the reqirements also incldes a temperatre monitor for the serial transformer. 06

7 online-spply-correction with adaptive reglation OSKαR WORKING PRINCIPLE FUNKTIONSPRINZIP OSKαR is an active three phase voltage stabilizing system which corrects the sorce voltage in magnitde and phase to the desired level with the help of state-of-the-art power electronics. The spply of the correction voltage throgh a robstly designed low-impedance serial transformer is significant for the rgged and overload capable design of the voltage stabilizer, while the power electronics enable an almost instantaneos correction of the otpt voltage. OSKαR APPLICATION EXAMPLE To serve also regenerative loads, the fll power converter is a 4-Qadrant operation converter eqipped with an Active Front End converter which ensres the bi-directional power flow between the sorce and the load. The real-time measrements shown are actal effective voltage vales. OUTPUT As clearly visible in the detailed view, the first half-wave of the effective voltage is already within the standard range. fotolia.com INPUT The above real time measrements give an impression of a 400V network, prone to voltage flctation and how the active voltage stabilizer OSKαR is correcting the voltage. Other application areas: - atomotive indstry -pharmacetical and chemical indstry - atomated processes (Indstry 4.0) - food indstry - medicial technology 07

8 OSKαR powered by Condensator Dominit OSKαR MODULAR AND EXPANDABLE The system power of OSKαR can be extended for different power reqirements by paralleling the power electronic modles. Based on the fndamental sizing of the modles, the most economical soltion wold reslt in the mltiples of 300kVA for 40% voltage correction or the mltiples of 400kVA for 30% voltage correction. One of the most niqe featre offered by OSKαR is the scalability. OSKαR systems with the same power ratings can be operated in parallel. This featre has been developed keeping ftre expansions in mind. De to its easy parallel connection, OSKαR is also the perfect soltion whenever a parallel spply throgh two or more transformers is present. Eingang Inpt Asgang Otpt EVU Utility MV I> OSKαR ~ ~ = = ~ ~ I> I> ~ ~ = = ~ ~ ~ ~ = OSKαR OSKαR ~ ~ = OSKαR Scalable OSKαR -Power = = ~ ~ Geschützte Last Protected Load Paralleling of OSKαR systems with eqal power rating 08

9 online-spply-correction with adaptive reglation ROBUST SHORT-CIRCUIT AND OVERLOAD PROTECTION When protecting critical indstrial prodction processes, nder no circmstances the spply of the process mst be interrpted if a falt within OSKαR occrs. On the other side, the high-tech power electronic modles in OSKαR mst not be damaged if there is an overload or a falt within the connected eqipment. Also, short circits at the connected loads or in the distribtion panel shold not only be bypassed by OSKαR, bt shold also be gided in a way that the protection eqipment on the cstomers side is tripping safely. The key part is a short-circit protection with a bypass based on thyristor modles. These modles become active in short-circit or nder any other falt conditions. The bypass modle is shielded by mechanical bypass switches, integrated into the inverter modle, offering a backp protection in case the bypass modle fails. Those mechanical bypass switches are designed for twice the rated crrent of the system. Therefore, these mechanical switches are ensring all forms of redndancy for garanteeing the protection of the load. Now that s what we call ROBUST! We call sch a system robst. Only a robst system is sitable for applications in indstrial processes. In order to meet these challenges, or R&D engineers have designed a mlti-redndant bypass system which ensres that the connection between sorce and load remains intact if any kind of falt occrs. OSKαR -Short-circit-protection 09

10 OSKαR powered by Condensator Dominit SERVICE BYPASS MAINTENANCE WITHOUT DOWN TIME Althogh OSKαR rns with only little maintenance, it mst be possible to isolate it from the connected electrical system for inspection or maintenance prposes. To avoid any prodction downtime, it is possible to bypass the complete system with an additional service bypass. The biggest advantage of it, especially in the continos process indstry, is that the prodction lines which are protected by OSKαR do not have to be interrpted or switched off even dring maintenance, ltimately reslting in zero downtime. Energy sppliers HV Service-Bypa ss NS 10

11 online-spply-correction with adaptive reglation OSKαR COMPARED UPS VARIABLE TRANSFORMER / VOLTAGE REGULATOR OSKαR SHORT CIRCUIT POWER CONTROL SETTLING TIME 1 half wave (< 10 ms) 1,5 2,5 sec. 1 half wave (< 10 ms) EFFICIENCY 94 % % 98,5 % SPACE REQUIREMENTS at 300 kva 1,0 m 2 2,4 m 2 0,5 m 2 WEIGHT kg kg 900 kg WEAR high-maintenance (loss of power of the energy storage) high-maintenance (mechanical wear) low-maintenance (no se of energy storage and mechanical components) Vales of the above comparison table are based on data sheets of third parties. fotolia.com 11

12 OSKαR powered by Condensator Dominit fotolia.com OSKαR DIGITAL WEB prodct over view: 12

13 fotolia.com online-spply-correction with adaptive reglation OSKαR animation: 13

14 OSKαR powered by Condensator Dominit OSKαR DESIGN EXAMPLE Voltage stabilizing for 300 kva loads with 40% voltage correction Voltage stabilizing for 600 kva loads with 40% voltage correction Voltage stabilizing for kva loads with 30% voltage correction 14

15 online-spply-correction with adaptive reglation OSKαR technical details POWER RANGE 20 % correction range 30 % correction range 40 % correction range E1 600 kva 400 kva 300 kva E kva 800 kva 600 kva E kva kva 900 kva E kva kva kva E kva kva kva E kva kva kva Bigger rated power can be ashieved by parallizing of systems with the same rated power NOMINAL VOLTAGE OSKαR OSKαR HV Ur 220 V 400 V 480 V 6 kv 11 kv rated freqency 50 Hz and 60 Hz PERFORMANCE Three-phase correction of voltage dips Single-phase correction of voltage dips Correction of Overvoltage events Continos correction range Reaction time Control settling time 30 % Nominal correction 70 % 60 % 35 % 55 % 5 % 120 % 110 % 90 % 110 % Inpt 40 % Nominal correction 60 % 50 % 30 % 40 % 0 % 120 % 110 % 90 % 110 % 0,2 ms 1 half-wave Efficiency > 98,5 % control accracy at voltage dips < 3 % Otpt 100 % 90 % 55 % 100 % 55 % 100 % 100 % 100 % 100 % Correction time 30 s 20 s 5 s 30 s 5 s 60 s 60 s (480 V Typ) OVERLOAD CAPACITY Peak crrent / Crest factor: 3 Effective power: 150 % (30 s) SHORT-CIRCUIT CURRENT 400 V 220 V 480 V 6 kv 11 kv (peak) TYPE p to 800 kva / 30 % 50 ka 90 ka 40 ka 24 ka 13,1 ka more than 800 kva / 30 % 120 ka 200 ka 100 ka p to 600 kva / 40 % 35 ka 60 ka 30 ka more than 600 kva / 40 % 85 ka 150 ka 70 ka 18 ka 9,8 ka fotolia.com Parameterization / Analysis: OPERATION Commnication: All listed designs are sample layots. Other versions on reqest. Toch Panel / Log-SD-Card / Mail Ethernet (RJ45) / FTP-Server / Mail-Server / Modbs 15

16 Condensator Dominit GmbH An der Bremecke 8 D Brilon / Germany Phone +49 (0) Fax +49 (0) info@dominit.e Web titel photo: fotolia.com