Distributed Coordination Control Based on State-of-Charge for Bidirectional Power Converters in a Hybrid AC/DC Microgrid

Abstract

This paper proposes a distributed coordination control for multiple bidirectional power converters (BPCs) in a hybrid AC/DC microgrid with consideration of state-of-charge (SOC) of storages. The researched hybrid AC/DC microgrid is composed of both AC and DC subgrids connected by multiple parallel BPCs. In the literature, the storages of a hybrid microgrid are considered to allocate in only the AC subgrid or DC subgrid, which reduces the reliability of the whole system, especially during the islanded mode. Besides, the SOC management has not been considered in BPCs' operating strategy. This paper considers a hybrid microgrid topology which has energy storages in both AC side and DC side. This ensures the reliability while increasing the complexity of the control strategy at the same time. Further, a distributed coordination control method for multiple BPCs based on SOC was proposed to enhance the reliability of hybrid microgrid. Finally, the performance of the proposed control methods was verified by real-time hardware-in-loop (HIL) tests.

An efficient power sharing approach in islanded hybrid AC / DC microgrid based on cooperative secondary control

“…Therefore, an additional term is required to be considered for m P i _ P i in Equation (17). Hence, the first-order multiagent system for this problem would be…”

“…In the AC or DC microgrids, hierarchical control structure is usually used in which the first layer controls the power sharing and the secondary layer restores the voltages and frequency to their desired values. Based on the literatures, most of the adopted distributed secondary controllers were used in bidirectional converters of hybrid AC/DC microgrids [16][17][18] and had not been considered in DGs of each subgrid except some new works. [19][20][21][22][23] A distributed control method for autonomous operation of three port AC/DC/distributed storages (DSs) hybrid AC/DC microgrid has been proposed in Reference 19.…”

4T Analog MOS Control-High Voltage High Frequency (HVHF) Plasma Switching Power Supply for Water Purification in Industrial Applications

“…A diode full bridge rectifier circuit was designed as the initial stage of the plasma power supply. The circuit rectifies the 220 V AC voltage to DC output voltage [31][32][33][34][35][36][37][38][39], which can be adjusted from 0 V to 300 V. A high frequency inverter circuit was designed and located, following by the rectifier DC link capacitor, which receives the DC voltage from the rectifier and converts it to a high frequency pulsating DC output voltage. The full-bridge PWM topology with high switching frequency was developed as an inverter circuit for the designed plasma power supply.…”

Hybrid Multimodule DC-DC Converters for Ultrafast Electric Vehicle Chargers

“…Consequently, to allow massive market penetration of EVs, the concept of ultrafast charging (UFC) requires more investigation. In this regard, several research studies targeting fast chargers and UFC for EVs have been provided in the literature [4][5][6][7][8]. UFC technology is a high power charging technology (≥ 400 kW) that can replace or substitute the ICE technology and can charge EVs' battery packs in ≤ 10 min [9][10][11].…”