Energy layer at 230 V / 50 Hz for selected branches of water and wastewater operations
When external supply is disturbed, the branches of a distributed site can have different conditions and different continuity windows. Each has its own supply arrangement and load profile. VENDOR.Max forms an autonomous energy layer around one selected branch — the branch whose continuity determines whether the site keeps the operational function that matters: observability, control, communication, or operation of a separate process branch.
The branch may be the control and telemetry layer, a separate auxiliary function, or a suitable process or pumping load. What becomes the branch of a first deployment is determined by the electrical profile of the site. For utility auxiliary systems, the station DC bus interfaces at 110 V and 220 V are considered. This page addresses stationary deployments in water, wastewater and electricity network infrastructure.
Project stage: TRL 4 — Prototype Rebuild After Relocation.
Branches of one site survive a supply disturbance differently
The operational question is not how many kilowatts the site draws. It is which function has to survive the event, and for how long.
At a wastewater lift station, the power supply of the pump and the supply of the control cabinet are two different circuits with two different fates. When the grid fails, a pump without a standby source loses its power supply and stops normal operation. The controller and the communication link keep running for as long as the uninterruptible power supply holds. The wet well consumes its stored volume in the meantime.
The same happens at a remote substation on different equipment. Primary equipment and secondary systems depend on auxiliary supply in different ways: telecontrol, communication and monitoring keep working within the limits set by the existing DC auxiliary architecture and its reserve.
The answer to that question defines the branch, and the branch defines the deployment.
- External event
- Different continuity windows
- Selected branch
- Measured pilot
Process plane and control plane: different circuits, different profiles, different decisions
This separation is a working instrument, not an illustration. A deployment always belongs to one side of it, and that side determines the electrical interface, the load profile and the scope of measurement at the pilot.
Two deployment directions
- Water and wastewater
-
Wastewater lift stations, remote pumping and booster stations, well and reservoir nodes, distributed pressure, level and district metering nodes. The purpose of a deployment is to keep a selected operational function of the site through a disturbance of external supply. In one case that is observability, control, alarm transmission and the ability to carry the site through a controlled shutdown and subsequent recovery. In another, it is operation of a separate process branch or a suitable pumping branch. These cases have different electrical profiles and are assessed separately.
- Utility auxiliary systems
-
Distribution and transmission substations, remote switching and automation nodes, network telecontrol points. The purpose is to keep a selected auxiliary, control, communication or operational function on which the observability, controllability and availability of the secondary equipment of the site depend. The subject of a deployment is a selected branch, not the station as a whole.
230 V / 50 Hz is the built output configuration
The AC configuration of the VENDOR.Max output stage has been built and operated under load; its target customer-facing interface is 230 V alternating current, 50 Hz. A site whose selected branch is supplied from a single-phase input of this class has direct nominal correspondence with that configuration in voltage and frequency. Full electrical correspondence is determined together with the neutral topology, the protective conductor and the protection architecture of the particular site.
There is no single point of connection. It is determined by the task of the pilot and the existing site arrangement: a dedicated single-phase branch, the input of a control cabinet, the input of an existing uninterruptible power supply, or another agreed point on the selected auxiliary or process branch.
Station DC buses at 110 V and 220 V
At European electricity network sites, 110 V and 220 V direct current are real interfaces of station auxiliary supply. They are not built output configurations of VENDOR.Max, but they are within the engineering design space of the output stage. Sites with such buses are accepted for assessment: before a pilot, a separate output stage configuration, an engineering review of the electrical integration and verification of the particular implementation are carried out.
VENDOR.Max enters the energy layer around a selected branch. The process equipment, the automation and the protection architecture of the site remain the systems of the operator and its suppliers.
A branch is selected by its electrical profile, not by the name of the equipment
A pumping load is treated as neither suitable nor unsuitable by the name of the equipment. Loads with a pronounced starting or transient profile are assessed against the actual electrical operating profile of the specific site.
- Main branch classes considered
-
- Control layer, controllers, telecontrol devices, telemetry, instrumentation and communication.
- Dedicated auxiliary and process branches of the site.
- Selected pumping loads, after assessment of their running and starting profile.
- Auxiliary, control and communication branches of electricity network sites, including telecontrol, monitoring and communication.
- Considered with a confirmed operating profile
-
- Dosing and disinfection.
- Valve and gate actuators.
- Pumps with pronounced starting or transient requirements.
- Any branch whose transient profile requires a configuration matched to the particular site.
- Outside the deployment proposition
-
- Process supply of the site as a whole.
- Three-phase station load as a whole.
- Assessment of applicability from the installed capacity of the site.
Applicability is established at engineering matching and at the pilot.
What changes for the selected branch
After start-up, the normal power path of VENDOR.Max does not provide for a continuous external power supply to the selected load through the input of the installation.
A station battery, an uninterruptible power supply, stored fuel and a hydraulic buffer provide continuity from a finite reserve. The VENDOR.Max energy layer around a selected branch changes the nature of that branch’s dependency on a continuous external power supply, rather than increasing the reserve.
Start-up is a separate event and is performed each time the installation is brought into operation. The actual operating figures of a selected configuration are established by measurement on site.
What is needed to determine applicability
A first assessment starts from data about the site and requires no procurement decision. To begin engineering matching, it is enough to describe the site as it operates.
General
- The selected branch and its operational role.
- The electrical interface of the branch: voltage, number of phases, alternating or direct current.
- Average and maximum load of the branch.
- Transient and starting profile where one exists.
- The existing continuity architecture of the site.
- Permissible interruption of the function.
- Installation environment, access and electromagnetic environment.
- Earthing arrangement and neutral regime at the point of connection.
- Existing protective disconnection and bonding arrangement at the selected point of connection.
Water and wastewater
- Control cabinet arrangement, uninterruptible power supply, telemetry.
- Separation of power and control parts, presence of a variable frequency drive.
- For a pumping branch: rated motor power, starting method, running current, starting profile and duration, duty cycle, starts per hour.
- Buffer volume of the wet well, tank or reservoir.
- Criticality of the process.
Electricity network sites
- Single-line diagram of the AC and DC auxiliary supply.
- Station DC bus voltage and charger topology.
- Branch segregation and the dependencies of telecontrol, communication and monitoring.
- Required autonomy of the existing battery.
- Downstream converters and the earthing arrangement.
Electromagnetic compatibility is taken into account during development and is verified for the particular installation configuration. Earthing and bonding, filtering, interface layout, measurement of conducted and radiated emissions and compatibility with the surrounding automation and communication equipment are included in the verification programme of the particular configuration where required.
Engineering matching, deployment, measurement, decision
Engineering matching
The load boundary, the applicable output stage configuration, the point of connection, the protection and earthing arrangement, the measurement boundaries, the electromagnetic compatibility criteria and the verification criteria are determined. The outcome is one of four: direct nominal correspondence, where the voltage and frequency of the selected branch match the built configuration, full electrical correspondence is verified against the protection, earthing and connection topology, and a pilot design is then prepared; interface-specific configuration, where the site matches the deployment class and the output stage is adapted before the pilot; change of scope boundary, where the site is suitable with a different selected branch; stop, where the branch or the interface falls outside the deployment space.
Pilot design
The arrangement by which VENDOR.Max interacts with the existing sources, reserves and protection is determined and agreed in the design of the particular pilot. The environmental execution is determined by the site: installation location, temperature, humidity, pollution, corrosive environment and enclosure requirements belong to site qualification and configuration design.
Measurement
Active power actually delivered to the load, continuity across the agreed operating window, behaviour under load changes, interaction with starting and peak conditions where applicable, thermal behaviour, power quality parameters where relevant, electromagnetic interaction with automation and communication equipment, coexistence with the existing reserve architecture, service observations and the constraints of the particular site.
Decision
On the results of measurement: continue, modify the configuration, or stop. The result is the measured operating limits of the particular site, not a general statement.
- Match
- Deploy
- Measure
- Establish site operating limits
Engineering and evidence materials
| Question | Material |
|---|---|
| How the installation works | How it works |
| Where the energy comes from | Energy source |
| How energy accounting is kept | Energy model |
| How active power is measured | Active power metrology |
| How independent verification is arranged | Technology validation |
| Extended operation under load | Endurance test |
| Patent protection | Patent portfolio |
Frequently asked questions
Which loads at a pumping station need continuous supply?
Not all loads require the same continuity. A site carries several functional layers with different continuity requirements. The pump motor, control, telemetry, instrumentation and other process branches have different electrical profiles. A deployment relates to one selected branch, and that choice is determined by the operational task of the site.
Can VENDOR.Max supply a whole pumping station?
No, that is not the deployment proposition. A selected branch of the site is considered. It may be the control layer or a separate pumping load, after assessment of its running and starting profile.
Can a pump motor be supplied?
Selected pumping loads may be considered. Applicability is determined from the actual operating profile of the specific site: rated motor power, starting method, running current, starting profile and duration, duty cycle and number of starts. No general statement is made about motors as a class.
Is external supply required after start-up?
After start-up, the normal power path of VENDOR.Max does not provide for a continuous external power supply to the selected load through the input of the installation. Start-up is nevertheless a mandatory condition: it is performed each time the installation is brought into operation and constitutes a separate event, not a permanent energy input.
What wears out in operation?
The initiation element is subject to wear and has its own finite operating life. The equipment as a whole has a service life, and maintenance remains. The actual operating life of a particular configuration is established through operation and measurement.
Does VENDOR.Max replace a station battery, an uninterruptible power supply or a standby source?
Not as a general rule. This page does not position VENDOR.Max as a replacement for a station battery, an uninterruptible power supply, a controller, protection or a standby source. The particular arrangement of interaction is determined by the pilot design.
What does the installation connect to at a water site?
To the selected branch. The particular point is determined by the task of the pilot and the site arrangement: a dedicated single-phase branch, the input of a control cabinet, the input of an existing uninterruptible power supply, or another agreed point on the selected branch.
Is a site with a 110 V or 220 V station DC bus suitable?
Such a site is accepted for assessment. These interfaces are not built output configurations, but they are within the engineering design space of the output stage: before a pilot, a separate output stage configuration, an engineering review of the integration and verification of the implementation are carried out.
How is electromagnetic compatibility handled next to controllers and telecontrol devices?
Electromagnetic compatibility is taken into account during development and is verified for the particular installation configuration. Earthing and bonding, filtering, interface layout and compatibility with the surrounding equipment belong to the scope of verification; the set of measurements is determined by the installation configuration.
What happens when the installation is not running?
That is determined by the pilot design. Existing sources, reserves and protection are retained or altered only within the agreed scope, fixed in advance for the particular site.
Which sites are outside the proposition of this page?
A deployment does not relate to the process supply of the site as a whole, nor to the three-phase station load as a whole. Applicability is not assessed from the installed capacity of the site: a selected branch is considered.
Does this page address mobile applications?
This page addresses stationary deployments in water, wastewater and electricity network infrastructure.
Describe the site as it operates
There is no need to establish in advance whether a configuration exists for your voltage. It is enough to describe the selected branch, its load and its electrical interface. Determining the critical load, the required output stage configuration and the order of verification is part of engineering matching.
