DC microgrid control strategy testing system and method

Abstract

The invention relates to the technical field of power and electronics, and discloses a micrgrid control strategy testing system and method. The system comprises a first upper computer which is in communication connection with a local controller and is used for generating a local control program and a configuration program in the local controller; the local controller which is used for operating the local control program so as to generate a local control signal of each microgrid power module, and is also used for operating the configuration program and emitting a configuration signal corresponding to each microgrid power module; a control chip which is used for carrying out the configuration of a filter and a current transformer according to the configuration signals, and enabling the filter and current transformer to work in working modes corresponding to the configuration signals, and is also used for controlling the current transformer according to the control signal, thereby controlling the operation of controlled simulation equipment of a microgrid. According to the embodiment of the invention, the system is better in flexibility, universality and stability, and facilitates the improvement of the testing efficiency of a DC microgrid control strategy.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a DC microgrid control strategy testing system and method. Background technique [0002] The DC microgrid is an independent controllable system that connects all micro power sources through a common DC bus in the form of DC power distribution. The research on the control strategy of DC microgrid is of great significance to the development of DC microgrid technology. At present, the more commonly used DC microgrid control strategy testing methods mainly include full digital real-time simulation and physical dynamic model testing. [0003] All-digital real-time simulation is to use power and power electronics simulation software to build the main topology of the microgrid, all controlled equipment and its related control algorithms, and use the simulation management software to integrate the main topology of the microgrid, all controlled equipment models and their relate...

AI Technical Summary

Problems solved by technology

However, the full-digital real-time simulation technology also has the following problems: (1) In the DC microgrid, especially the controlled equipment such as generators and batteries, the equivalent mathematical model is used, which ignores the electromagnetic characteristics of the generator and the parameters of the generator during operation. Therefore, it is different from the actual controlled object; (2) The real-time all-digital simulation is a signal-level simulation, and the control algorithm and the controlled object are only data input and output. Many problems such as data conditioning delay and communication protocol involved in the signal interaction between the actual controlled device and the controller are too ideal; (3) The mathematical model of the full digital real-time simulation can be connected with other micro-grids through the power amplifier and the power hardware in the loop. In order to reduce the impact of model inaccuracy, but if the physical interface equipment and interface algorithm of the physical object and the mathematical model are not handled properly, time delay will occur, which is not conducive to the development of DC microgrid control strategy.

[0005] In the process of realizing the present invention, the inventors found that the physical dynamic model test system, as a development and testing platform for DC microgrid control strategy, still has the following problems: (1) When the topology of the entire DC microgrid changes, the physical dynamic model test system, etc. The communication between the effective simulation devices and the real-time simulation device as the DC microgrid energy manager needs to be re-modified and debugged according to the specific topology, and there is duplication of workload; (2) Each physical equivalent simulation device uses its own The DSP or PLC runs the control algorithm of the simulated device. When it is necessary to modify the control algorithm of the controlled device in the DC microgrid simulated by each physical equivalent simulation device, some physical equivalent simulation devices do not open their control algorithms. Therefore, it is necessary to rewrite and modify the control program code of the equivalent analog equipment and burn it into DSP or PLC, which increases the complexity of the test

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