The high overlap of participants in the carbon emissions trading and electricity markets couples the operations of the two markets. The carbon emission cost (CEC) of coal-fired units becomes part of the power generation cost through market coupling. The accuracy of CEC calculation affects the clearing capacity of coal-fired units in the electric power market. Study of carbon–electricity market interaction and CEC calculations is still in its initial stages. This study analyzes the impact of carbon emissions trading and compliance on the operation of the electric power market and defines the cost transmission mode between the carbon emissions trading and electric power markets. A long-period interactive operation simulation mechanism for the carbon–electricity market is established, and operation and trading models of the carbon emissions trading market and electric power market are established. A daily rolling estimation method for the CEC of coal- fired units is proposed, along with the CEC per unit electric quantity of the coal-fired units. The feasibility and effectiveness of the proposed method are verified through an example simulation, and the factors influencing the CEC are analyzed.

Inductive power transfer (IPT) is an optimal charging method for unmanned aerial vehicles (UAV) with the qualities of being convenient, automatic and reliable. As the key component in IPT, the magnetic coupler must be lightweight and have a simple structure and high power capacity. Furthermore, low leakage flux and misalignment resilience are considered. A novel magnetic coupler is presented in this paper to improve these performances. The magnetic flux of this coupler is investigated by ANSYS Maxwell, and the analysis result shows that magnetic flux is converged near the primary pad, which is conducive to lowering electromagnetic interference to UAVs. A 600W IPT system is designed with 200mm ÷ 200mm 20 turns transmitter pad and 160mm × 60mm 15 turns receiver air-core coil. The experimental prototype reaches a dc-dc efficiency of 90% at 624W output power. The system can also maintain stable power transmission with high efficiency when misalignment is within the range of [-30mm, 30mm].

Wireless power transfer (WPT) has been widely utilized in mobile phones and electric vehicles because of its convenience. Once WPT can be applied to the Autonomous Underwater Vehicles (AUV), the cruise time and concealment of AUV will be greatly improved. However, the AUV are easily affected by the tidal currents when they are charged wirelessly, resulting in misalignment and low transmission efficiency. For this reason, a strong misalignment tolerance magnetic coupler is designed in this paper through finite element analysis (FEA). A 600W prototype was built in the laboratory and its experimental results validated the theoretical analysis and strong misalignment tolerance. The output power and efficiency can reach 600W and SO% respectively with rotational misalignment of 7° and axial misalignment of 28mm.