Test arrangement for testing a power electronics controller
A test arrangement for testing a power electronics controller, wherein the controller has supply connections and load connections. A plurality of power electronics modules each have supply connections, at least one load connection, and an interface for controlling the power electronics module. In an operational state of the test arrangement, the supply connections of the controller are each connected to the load connection of a supply-side power electronics module and the load connections of the controller are each connected to the load connection of a load-side power electronics module. Thus, a rapid supply-side current regulation can be realized in a simple way in that the control device calculates at least the determined actual currents at the load connections of the supply-side power electronics modules from determined electrical connection variables of the load connections of the load-side power electronics modules for use for the feedforward control.
1 . A test arrangement to test a power electronics controller, the controller having supply connections to supply energy and load connections to control an electrical load, the test arrangement comprising:
at least two power electronics modules, each of the at least two power electronics module comprising:
a supply connection to supply energy;
at least one load connection to provide at least one electrical connection variable; and
at least one interface to control the power electronics module,
wherein, in an operational state of the test arrangement, the supply connections of the controller are each connected to the load connection of a supply-side power electronics module and the load connections of the controller are each connected to the load connection of a load-side power electronics module,
wherein the interface of the supply-side and the interface of the load-side power electronics modules are at least indirectly supplied with control values by at least one control device,
wherein the control device for setting setpoint currents at the load connections of the supply-side power electronics modules calculates the control values for the supply-side power electronics modules via a mathematical energy source model and using the determined actual currents at the load connections of the supply-side power electronics modules,
wherein the calculated control values are modified by a feedforward control using the determined actual currents at the load connections of the supply-side power electronics modules and the interfaces of the supply-side power electronics modules are supplied with the modified calculated control values, and
wherein the control device calculates at least the determined actual currents at the load connections of the supply-side power electronics modules for the feedforward control from the determined electrical connection variables of the load connections of the load-side power electronics modules.
2 . The test arrangement according to claim 1 , wherein the control device calculates the load-side active electrical power from the determined electrical connection variables of the load connections of the load-side power electronics modules and calculates the determined actual currents at the load connections of the supply-side power electronics modules from the load-side active electrical power.
3 . The test arrangement according to claim 1 , wherein the control device calculates a mathematical load model of a load to be simulated by the load-side power electronics modules, determines information about the mechanical power of the load to be simulated from the load model, and calculates the load-side active electrical power from the mechanical power of the load to be simulated and information about the efficiency of the controller, and calculates the determined actual currents at the load connections of the supply-side power electronics modules from the load-side active electrical power.
4 . The test arrangement according to claim 2 , wherein the control device uses a measured voltage between the load connections of the supply-side power electronics modules to calculate the determined actual currents at the load connections of the supply-side power electronics modules from the calculated load-side active electrical power.
5 . The test arrangement according to claim 2 , wherein the control device uses a voltage, calculated using the energy source model, between the load connections of the supply-side power electronics modules to calculate the determined actual currents at the load connections of the supply-side power electronics modules from the calculated load-side active electrical power.
6 . The test arrangement according to claim 1 , wherein the control device calculates both the determined actual currents at the load connections of the supply-side power electronics modules for calculating the control values for the supply-side power electronics modules using the energy source model and the determined actual currents at the load connections of the supply-side power electronics modules for use with the feedforward control for modifying the control values calculated using the energy source model from the determined electrical connection variables of the load connections of the load-side power electronics modules.
7 . The test arrangement according to claim 1 , wherein the determined actual currents at the load connections of the supply-side power electronics modules are measured to calculate the control values for the supply-side power electronics modules using the energy source model.