Grounding design of electrochemical energy storage power station

What is short-circuit fault of DC BUS in energy storage power station?

In this paper, the short-circuit fault of DC bus in energy storage power station is analyzed and simulated. The short circuit of DC bus is composed of three parts: short circuit current provided by energy storage battery, short circuit current provided by power grid and short circuit current provided by DC energy storage capacitor.

How to simulate DC short-circuit process in energy storage power station?

Simulation of DC short-circuit process in energy storage power station Establish a simulation system in PSCAD/EMTDC. The entire energy storage system is connected to the DC bus by the battery pack through the connection cable, and then connected to the converter.

What are battery energy storage power stations?

Battery energy storage power stations are mainly composed of battery packs, inverters, monitoring and management systems, etc. Generally speaking, they are directly connected to the power system via grid-connected transformers. At present, the domestic large-scale battery energy storage system is still in the preliminary research and test stage.

Does inter-pole fault protection scheme apply to DC systems with different grounding methods?

The characteristics of inter-pole faults in DC systems with different grounding methods are the same, so the inter-pole fault protection scheme is applicable to DC systems with various grounding methods. AC side voltage waveform b. AC side current waveform Figure 6. Converter’s waveform when a DC ground fault occurs in an energy storage station

Does DC short circuit affect AC side of energy storage station?

According to the different grounding modes of DC system, the paper analyzes the electrical characteristics of DC system pole to pole fault and ground fault respectively, and puts forward corresponding protection strategies, but does not analyze the impact of DC short circuit on the AC side of energy storage station.

What is electrochemical energy storage?

Electrochemical energy storage has been widely used in the field of distributed generation because of its convenient installation and flexible capacity configuration. Electrochemical energy storage mainly refers to various battery energy storage technologies, including lead-acid battery, mobile battery, lithium battery, sodium sulfur battery, etc.