Revcon Powerfactor Correction
In a most common sense, when speaking about reactive power and power factor this is referring to fundamental sinewave signals where current and voltage are at a different angle.
Typically the reactive power is calculated by the cos ϕ (also referred to as power factor, pf).
The Beer is indicating what you actually wants, while the foam is representing the reactive power. This illustration is giving a simplified picture of the reactive power only taking into account the sinewave signals. This can be used for most tyoical inductive loads such as motors connected direct on line (without Variable Speed Drive).
Power Factor:
In many regions, utilities charge customer based on power factor. Due to inefficient use, a low power factor usually lead to higher charges.
Infrastructure efficiency:
Reactive power needs to be generated, transferred nd distributed. At all times, this will cause losses in the system.
Infrastructure costs:
While reactive power does not create any real work in the final application, reactive power still increase the current in the whole system. This is causing high costs due to necessary oversizing of equipment such as transformer, switches and wire.
Voltage stability:
Avoiding reactive power and ensuring a stable pf stabilizes the voltage and helps avoiding fluctuations in the voltage.
With more complex loads, such as a mixture of VFD and inductive loads, the beer allegory is not sufficient. In order to evaluate the true reactive power, the distortion power caused by harmonics must be considered.
Looking at the true power factor this is affected by both THDi and cos(ϕ):
Therefore when improving power factor both harmonics and fundamental reactive power should be treated, rather than dealing with these two issues individually.
This leads to some advantages in the solution itself due to the calculation of the RMS current:
Using the equation above, fundamental current and harmonic currents are added as square sum. In a system with 100A of harmonic currents and 150A of reactive current, they would typically require two individual solutions with 100A and 150A. This leads to 250A compensation current in total.
100 A + 150 A = 250 A
With the use of REVCON active compensation by RPC-eSVG or RHF-Active, significant savings can be archieved.
The required compensation current in this example is reduced by 28% by a smarter connection.
RPC – efficient Static VAR Generator.
This product is a SiC based active compensation module, and available from 70kVA to 480kVA in one panel, but can be parallel up to reach higher capacity if required. Unit may at the same time compensate harmonics (5-13th order), up to a maximum of 30% of the nominal capacity. The Harmonic compensation capability can be improved by combining with RHF-Active range. The efficiency of this solution >98.4%, this corresponds to 30% less losses than comparable systems using IGBT Technology.
RPC-eSVG |
|||
Typ |
Harmonics compensation [A] |
kVAR (400V) |
kVAR (480V) |
RPC-eSVG 85-480-50/60-20-A |
33 |
70 |
85 |
RPC-eSVG 125-480-50/60-20-A |
50 |
100 |
125 |
RPC-eSVG 170-480-50/60-20-A |
66 |
140 |
170 |
RPC-eSVG 210-480-50/60-20-A |
83 |
170 |
210 |
RPC-eSVG 250-480-50/60-20-A |
100 |
200 |
250 |
RPC-eSVG 295-480-50/60-20-A |
115 |
240 |
295 |
RPC-eSVG 335-480-50/60-20-A |
133 |
270 |
335 |
RPC-eSVG 375-480-50/60-20-A |
150 |
300 |
375 |
RPC-eSVG 420-480-50/60-20-A |
167 |
340 |
420 |
RPC-eSVG 460-480-50/60-20-A |
183 |
370 |
460 |
RPC-eSVG 500-480-50/60-20-A |
200 |
400 |
500 |
The most efficient way to eliminate fundamental reactive power, is a simple detuned capacitor, which on its own has some disadvantages. The RPC-Hybrid is combining this well approved and conventional technology, with active compensation, which results in an extremely efficient solution at lower costs than an active module. At the same time this combination offers most of the advantages from an active solution such as stepless control and low response time.
RPC-Hybrid |
|||
Typ |
Harmonics |
kVAR (400V) |
kVAR (480V) |
RPC-Hybrid 240/85-480-50/60-20-A |
33 |
200 |
240 |
RPC-Hybrid 340/125-480-50/60-20-A |
50 |
283 |
340 |
RPC-Hybrid 480/170-480-50/60-20-A |
66 |
400 |
480 |
RPC-Hybrid 580/210-480-50/60-20-A |
83 |
483 |
580 |
RPC-Hybrid 680/250-480-50/60-20-A |
100 |
567 |
680 |
Your contact person Mr. Martin Elvhage,
can be reached at: +49 (0)2383 920 22 32
or send your enquiry by e-mail
to: m.elvhage@revcon.de
Dipl.-Ing. Frank Rambuscheck
Techn. Geschäftsführer
Tel: +49(0) 2383/92022-22
E-Mail: F.Rambuscheck@revcon.de
Mareike Hrubesch-Fondacaro
Kfm. Geschäftsführerin
Tel: +49(0) 2383/92022-22
E-Mail: M.Hrubesch-Fondacaro@revcon.de
Markus Damasch
Geschäftsleitung Projekte
Prokurist
Tel: +49(0) 2383/92022-19
E-Mail: M.Damasch@revcon.de
Martin Elvhage, B. Eng.
Business Development Manager – Applikationsberatung
Tel: +49(0) 2383/92022-32
E-Mail: M.Elvhage@revcon.de
Stanley Ng
Managing Director (APAC)
Stanley@revcon.com.sg
+6562660523
Beaujolais Ng
Technical Engineer - Responsible for technical questions
beaujolais@revcon.com.sg
+6562660523
Beacher Ng
Account Admin Assistant – Responsible for offer and accounts
beacher@revcon.com.sg
+6562660523
Bitte füllen Sie die mit einem einem Stern * markierten Felder aus.
Bitte füllen Sie die mit einem einem Stern * markierten Felder aus.
Bitte füllen Sie die mit einem einem Stern * markierten Felder aus.
Bitte füllen Sie die mit einem einem Stern * markierten Felder aus.
Ihren Ansprechpartner Herrn Martin Elvhage,
erreichen Sie unter: +49 (0)2383 920 22 32
oder schicken Sie Ihre Anfrage per E-Mail
an: m.elvhage@revcon.de
Your contact person Mr. Martin Elvhage,
can be reached at: +49 (0)2383 920 22 32
or send your enquiry by e-mail
to: m.elvhage@revcon.de
睿康电气(深圳)有限公司 A5 Building, First industry zone, Xiashiwei village, Bao'an, Shenzhen, 518000, PRC