AC Formblatt
Formblatt Ausfüllbar AC System-neu.pdf
Battery System Requirements for Park Controller Integration
This document defines the minimum communication and performance requirements for integrating a Battery Energy Storage System (BESS) into the EcoData Park Controller.
The purpose of this questionnaire is to determine whether the battery system can be controlled sufficiently fast and accurately for active power control, reactive power control and grid support applications.
General Information
| Parameter | Value |
|---|---|
| Manufacturer / System | |
| Model / Type | |
| Technical Contact | |
| Phone | |
Required Data Points and Control Functions
The following measured values and control values must be available via Modbus TCP, Modbus RTU or another documented communication interface.
Measured Values
| Data Point | Supported | Register Address | Comment / Scaling / Unit |
|---|---|---|---|
| Actual charge/discharge power (AC side) | ☐ Yes ☐ No | kW | |
| Actual reactive power (AC side) | ☐ Yes ☐ No | kVar | |
| State of Charge (SOC) | ☐ Yes ☐ No | % | |
| State of Health (SOH) | ☐ Yes ☐ No | % | |
| Available charging power (currently available) | ☐ Yes ☐ No | kW | |
| Available discharging power (currently available) | ☐ Yes ☐ No | kW | |
| Nominal charging power | ☐ Yes ☐ No | kW | |
| Nominal discharging power | ☐ Yes ☐ No | kW | |
| Nominal reactive power | ☐ Yes ☐ No | kVar |
Available Power Requirements
The available charging and discharging power registers shall represent the actual currently available power.
These values must reflect limitations caused by:
- Battery temperature
- State of Charge limitations
- BMS restrictions
- PCS restrictions
- Protection functions
- Any other temporary limitation of charging or discharging capability
Example:
A 1 MW battery system may only be able to charge with 200 kW because the battery is almost full. In this case the available charging power register shall report 200 kW and not the nominal 1 MW.
Control Values
| Control Function | Supported | Register Address | Comment / Scaling / Unit |
|---|---|---|---|
| Charge/discharge power setpoint (AC side) | ☐ Yes ☐ No | kW | |
| Reactive power setpoint (underexcited / overexcited) | ☐ Yes ☐ No | See requirements below | |
| Minimum controllable active power | ☐ Yes ☐ No | kW or % |
Reactive Power Setpoint Requirements
The reactive power setpoint must support one of the following input formats:
- Percentage of nominal reactive power (%)
- var
- kVar
Please indicate the supported format.
| Setpoint Type | Supported |
|---|---|
| % of nominal reactive power | ☐ Yes ☐ No |
| var | ☐ Yes ☐ No |
| kVar | ☐ Yes ☐ No |
Not Acceptable
Reactive power control via:
- cos φ setpoint
- power factor setpoint only
is not sufficient and cannot be used for integration.
If the reactive power setpoint is specified as a percentage, an additional register providing the nominal reactive power is required.
Dynamic Performance Requirements
Setpoint Processing
The battery system shall follow externally provided active power and reactive power setpoints directly.
The battery inverter, power conversion system (PCS), energy management system (EMS) and battery management system (BMS) shall not apply additional ramp limits, smoothing functions, filtering functions or delayed execution that would modify the requested setpoint trajectory.
The EcoData Park Controller generates all required ramps and power gradients. The battery system shall therefore execute the received setpoints as requested.
Required Behaviour
A step change of the active power setpoint shall result in an immediate response of the battery inverter.
The implemented power at the AC terminal shall continuously follow the externally provided setpoint without additional internal ramping.
Response Time
The response time is defined as:
Time between receipt of a new active power setpoint and achievement of the requested active power level at the AC terminal of the battery inverter.
Maximum acceptable response time:
≤ 500 ms
Manufacturer specified response time:
________ ms
Ramp Rate Capability
Please specify the maximum achievable active power ramp rate of the battery system.
| Parameter | Value |
|---|---|
| Maximum charging ramp rate | __________ %Pn/s |
| Maximum discharging ramp rate | __________ %Pn/s |
| Maximum charging ramp rate | __________ kW/s |
| Maximum discharging ramp rate | __________ kW/s |
Internal Ramp Limitation
Does the system apply any internal ramp limitation, power smoothing, filtering or slew-rate limitation?
- ☐ No
- ☐ Yes
If yes, please specify:
Communication Performance
| Parameter | Value |
|---|---|
| Maximum read cycle time | __________ ms |
| Maximum write cycle time | __________ ms |
| Recommended polling interval | __________ ms |
| Supported communication protocols | __________ |
Notes
Integration can only be performed if a real test system is available.
A technical contact person from the battery system manufacturer must be available during the integration process and must be familiar with the communication interface, register map and controller configuration of the battery system.
The manufacturer is responsible for providing complete and correct documentation of all registers, scaling factors, units and communication parameters required for integration.