ve.bus:manual_parallel_and_three_phase_systems
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ve.bus:large_system_notes [2016-06-22 23:10] – mvader | ve.bus:manual_parallel_and_three_phase_systems [2024-07-23 05:13] (current) – mleeftink | ||
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- | ====== Parallel and three phase VE.Bus systems ====== | + | ====== Parallel, split- |
+ | |||
+ | This manual explains the details of designing, installing and configuring three-phase and parallel systems. It applies to components that use VE.Bus, for example, MultiPlus, Quattro and some larger VE.Bus inverters. | ||
+ | |||
+ | **IMPORTANT: | ||
+ | |||
+ | * Always update all units to the latest firmware version during commissioning of the system: ([[updating_firmware: | ||
+ | * Note that some parts of the description below apply only to firmware version 400 and later. | ||
+ | * All units in one system must be the same type and firmware version; this includes same size, system voltage, and feature set. The type is indicated by the first four digits of the firmware version number. For details, see the " | ||
+ | * Specify with your [[https:// | ||
+ | * The same number of units need to be installed on each phase. An example to clarify: 3 units on L1, 3 on L2, and 3 on L3 is OK. But 2 on L1, 3 on L2 and 3 on L3 is not OK. The only way such non-symmetrical installation is supported is when using no monitoring at all, or a Digital Multi Control. Combining such system with any other monitoring device, such as the VE.Bus Smart Dongle or a GX device like the Cerbo is not supported. Numbers and information shown on the GX device as well as VRM portal will or can be wrong, and controlling the system, for example setting input current limits will not always work properly either. | ||
+ | * MultiPlus-II 8k, 10k, and 15k models can only be connected in parallel if an external AC transfer switch is used. For more information see the [[https:// | ||
+ | * While VE.Bus System Configurator allows setting up a system using Multis (each having a single AC input), that is configured to have multiple separate AC inputs, such system is not supported by GX devices. | ||
+ | * This information does __not__ apply to the Multi RS and Inverter RS models, which use a VE.Can interface (not VE.Bus) see the RS product manuals for specific information on programming them for three phase. | ||
+ | |||
+ | ===== Warning ===== | ||
+ | |||
+ | Parallel and Multiphase systems are complex. | ||
+ | |||
+ | Victron is able to provide specific training for these systems to [[https:// | ||
+ | |||
+ | These should all be considered essential before attempting design or installation. | ||
+ | |||
+ | First get experience with smaller systems. If you are new to Victron, please start with simpler designs, so that you become familiar with the necessary training, equipment and software required. | ||
+ | |||
+ | It is also recommended to hire an installer that has experience with these more complex Victron systems, for both the design and the commissioning. | ||
+ | |||
+ | |||
+ | ===== Maximum System size ===== | ||
+ | |||
+ | __Three phase systems__ | ||
+ | |||
+ | Using our 15kVA Quattros, the maximum system size is a 180kVA three phase system. Which then consists of four units on each of the three phases: 12 units in total. | ||
+ | |||
+ | When using smaller models, there is a maximum of five units in parallel, on each of the three phases: 15 units in total. For example, using 10kVA Quattros, the maximum system size is a 150kVA three phase system. | ||
+ | |||
+ | __Single phase systems__ | ||
+ | |||
+ | This is the same as above, but then per phase: | ||
+ | * maximum single phase system with 15kVA Quattros is 75kVA: five units. | ||
+ | * maximum single phase system with 10kVA Quattros is 60kVA: six units. | ||
- | This manual explains the details of designing, installing and configuring three-phase and parallel systems. | ||
===== DC and AC wiring ===== | ===== DC and AC wiring ===== | ||
- | Both the DC and AC wiring needs to be symmetrical per phase: use the same length, type and cross-section | + | |
+ | === Main text === | ||
+ | The VE.Bus cluster maintains a single ' | ||
Also beware of sizing the battery cable and jumpers between cells/ | Also beware of sizing the battery cable and jumpers between cells/ | ||
- | For units in parallel: use one AC fuse for all units on that phase. | + | For units in parallel: Both the DC and AC wiring needs to be symmetrical per phase: use the same length, type and cross-section to every unit in the phase. To make this easy, use a bus-bar or power-post before and after the inverter/ |
+ | |||
+ | With regards to AC fusing, each unit needs to be fused individually. Make sure to use the same type of fuse on each unit due to same resistance. Consider using mechanically connected fuses. | ||
+ | |||
+ | With regards to DC fusing, each unit needs to be fused individually. Make sure to use the same type of fuse on each unit due to same resistance. | ||
+ | |||
+ | For both AC and DC fusing and protection, consult the product manual for details and recommended ratings. | ||
+ | |||
+ | Beware of phase rotation between the inverter and AC in. When wired in a rotation | ||
+ | |||
+ | === Warning against over-dimensioning the AC wiring === | ||
+ | Note: Do not over-dimension the AC cabling. Using extra thick cabling has negative side effects. | ||
+ | |||
+ | Technical background: for a properly working parallel system, the AC current should be evenly distributed between the paralleled units. The resistance in the cabling helps with that and is needed for that; to overcome small differences between one inverter/ | ||
+ | |||
+ | An exaggerated example: | ||
+ | * Using 2 units (A and B) parallel and using too good cabling, one might achieve a total resistance for Unit_A of 0.0001Ω and a total resistance for Unit_B of 0.0002Ω. This results in Unit_A carrying twice as much current as Unit_B. | ||
+ | * Using the same 2 units in parallel with, for the sake of this example underdimensioned AC cabling one might end up with a total resistance for Unit_A of 15Ω and a total resistance for Unit_B of 16Ω. This results in a much better current distribution (Unit_A will carry 1.066 times more current than Unit_A) even if the absolute difference in resistance is much bigger than in the previous example (1Ω vs 0.0001Ω). | ||
+ | |||
+ | A side effect of over dimensioning the AC cabling can be faulty Power Assist operation. Out of all units, the phase master is in control and measuring the AC input current. And in case that current is (grossly) unevenly distributed between the paralleled units, the resulting total AC input current can end up being too low (under charging the battery). | ||
+ | |||
+ | === Delta configurations not supported === | ||
+ | |||
+ | For units in 3 phase configuration: | ||
+ | We do not support a delta (Δ) configuration. A delta configuration does not have a distributed neutral and will lead to certain inverter features not operating as expected. | ||
+ | |||
+ | |||
+ | |||
+ | === Theory and background information ==== | ||
+ | |||
+ | Wiring | ||
+ | * {{: | ||
+ | * {{: | ||
+ | * [[https:// | ||
- | For DC, one fuse per phase is best. If a big single fuse is not available, use one fuse per unit. Same type of fuse due to same resistance. | ||
- | Beware of phase rotation between the inverter and AC in. When wired in the wrong rotation, the system will not accept the mains input and only operates in inverter mode. In that case swap two phases to correct it. | ||
===== Communication wiring ===== | ===== Communication wiring ===== | ||
- | * All units must be daisy chained with the VE.Bus cable (RJ-45 cat5). The sequence for this is not important. Do not use use terminators in the VE.Bus network. | + | * All units must be daisy chained with the VE.Bus cable (RJ-45 cat5). The sequence for this is not important. Do not use terminators in the VE.Bus network. |
- | * The temperature sensor can be wired to any unit in the system. For a large battery bank it is possible to wire multiple temperature sensors. The system will use the one with the highest temperature to the temperature compensation. | + | * The temperature sensor can be wired to any unit in the system. For a large battery bank it is possible to wire multiple temperature sensors. The system will use the one with the highest temperature to determine |
- | * Wire the voltage sense on the master of L1. | + | * Wire the voltage sense on the master of L1.\\ (If the system has more than 1 AC input, connect it to the Master corresponding to the first AC input.) \\ All other units ignore their voltage sense input and receive the voltage sense value from the L1 master. |
===== Configuration ===== | ===== Configuration ===== | ||
- | Always update all units to the latest 400 firmware version ([[updating_firmware: | ||
- | In the [[https://www.victronenergy.com/support-and-downloads/software# | + | Note: Special considerations exist before initial power-up for large systems using Redflow batteries: |
- | * Up to three units use VE.Bus Quick Configure | + | |
- | * Systems with 4 units or more use VE.Bus System Configurator | + | |
- | Activate VEConfigure | + | In the [[https:// |
+ | * Up to three units: use VE.Bus Quick Configure | ||
+ | * 4 units or more: use VE.Bus System Configurator | ||
+ | |||
+ | Activate VEConfigure | ||
Make the following settings in the master of L1: | Make the following settings in the master of L1: | ||
- | * All charger settings, such as absorption voltage, float voltage and max charge current. | + | * All charger settings, such as absorption voltage, float voltage and max charge current.\\ (The maximum charge current is multiplied by the number of units in the system: in a 9 unit system set it to 50A to get a 450A maximum |
- | * The maximum charge current is multiplied by the number of units in the system: in a 9 unit system set it to 50A to get a 450A charge current. | + | * System frequency |
+ | The following settings need to be made in the master of each phase: | ||
+ | * Inverter output voltage | ||
+ | * Input current limits\\ (the effective input current limit is the limit set on the master multiplied by the number of units per phase. For example, setting a 10A limit with VEConfigure in a system with two units per phase results on a 20A limit for that phase. Being able to set a different limit per phase allows for maximum configurability.\\ \\ Setting an input current limit works differently when setting it on a remote control panel, for example a DMC or GX device. Then (a) only one value can be set by the user, not a different for each phase, and (b) the configured limit will be used as the total limit for each phase. Example, setting 30A in a three phase system of six units (two per phase), on a DMC or GX Device, results in a max input current limit of 30A per phase. The difference of both methods is due to the different use case of both ways of setting it: settings in VEConfigure are supposed to be fixed in the install and done be the installer, for example matching an installed generator. And the input current limit as set on the GX device is intended to be set by the end-user, for example on a yacht or in a motor home, and being able to set it depending on the actual shore connection - and ofcourse without having to do the maths of multiplying with the number of installed units on a phase.) | ||
* UPS function on/off | * UPS function on/off | ||
+ | * PowerAssist settings | ||
* Accept wide input frequency range on/off | * Accept wide input frequency range on/off | ||
+ | The following settings need to made in each unit in the system: | ||
+ | * Country / grid code standard and other grid related values (AC high/ low values) | ||
+ | * DC input low shut-down values. | ||
- | The following | + | Charger |
- | * Inverter output | + | |
- | * Input current limits. This makes it possible to set a different input current limit per phase. Note that, similar to the maximum charge current, the input current limit used by the system | + | |
- | The following settings need to made in each unit in the system: | + | A quick way to make settings |
- | * Country / grid code standard | + | |
+ | Note that AES is only operational in stand-alone systems. Not in parallel and multi-phase systems. | ||
==== Virtual switch ==== | ==== Virtual switch ==== | ||
A unique virtual switch configuration can be configured for each unit in the system. With the exception of the Ignore AC input function: configure that in the master of L1. | A unique virtual switch configuration can be configured for each unit in the system. With the exception of the Ignore AC input function: configure that in the master of L1. | ||
==== Assistants ==== | ==== Assistants ==== | ||
- | | + | |
+ | Assistants can be used to expand the potential configuration options of your system, and are required in some installation types. When using assistants with multiple units, some assistants are required to be loaded onto all units in the system individually, | ||
+ | |||
+ | | ||
* PV Inverter Assistant needs to be loaded into each unit in the system. | * PV Inverter Assistant needs to be loaded into each unit in the system. | ||
- | * The VE.Bus BMS and the Lynx Ion BMS support Assistant also need to be loaded in each unit in the system. | + | * The VE.Bus BMS and the Two-Signal |
+ | * For the [[https:// | ||
With all the other Assistants: genset start/stop, relay locker etcetera, a unique configuration can be made in each unit. | With all the other Assistants: genset start/stop, relay locker etcetera, a unique configuration can be made in each unit. | ||
- | |||
- | Tip: a quick way to load Assistants into each unit in the system is to save the settings after configuring the master in L1. Then load that file into all other units. VEConfigure will automatically adapt the Assistants for the slaves. | ||
===== Tips and hints ===== | ===== Tips and hints ===== | ||
- | * {{: | + | * {{: |
+ | * {{: | ||
* [[https:// | * [[https:// | ||
* [[https:// | * [[https:// | ||
* Use the help-file in VEConfigure, | * Use the help-file in VEConfigure, | ||
- | ===== DISQUS | + | |
- | ~~DISQUS~~ | + | ===== System Monitoring |
+ | It is strongly recommended that a [[venus-os: | ||
+ | Data from [[http:// | ||
+ | |||
+ | ===== Training Video ===== | ||
+ | |||
+ | There is an advanced training video and competency exam for 3 phase and parallel installation and commissioning available on [[https:// | ||
+ |
ve.bus/manual_parallel_and_three_phase_systems.1466629819.txt.gz · Last modified: 2016-06-22 23:10 by mvader