The power industry is responsible for approximately 40% of the country's total carbon emissions. Therefore, reducing carbon emissions in the power industry is crucial to completing the carbon emission peak and carbon neutrality goals. The average carbon emission factor of the power grid refers to the carbon emissions per unit of power supply in the regional power grid, which is a key indicator for accounting for indirect carbon emissions from electricity consumption in Scope 2. The China has established an ultra-high voltage AC and DC interconnected power grid. The calculation of the average carbon emission factor of the power grid is affected by the received electricity, and the amount of green electricity traded within and between provinces is increasing year by year. The transfer of green environmental benefits caused by green electricity trading also impacts the calculation of the average carbon emission factor of the power grid. Therefore, accurately and scientifically calculating the average carbon emission factor of the power grid based on the physical topology of the interconnected power grid is essential, taking into account the inter-provincial transmission capacity and green electricity trading capacity. This paper proposes a method to calculate the average carbon emission factor of interconnected grids based on the average carbon emission factor of grids published by IPCC and considering the rules of green electricity trading. The average carbon emission factor of 27 provincial and 6 regional grids under State Grid Corporation is calculated, and the feasibility and accuracy of the method are verified using statistical data from the China Electricity Council.
KEYWORDS: Control systems, Data communications, Telecommunications, Safety, Power grids, Data conversion, Wireless communications, Data transmission, Design and modelling, Optical communications
The safe operation of the safety stability control system is an important means to ensure the safe and stable operation of AC and DC power grids. Aiming at the shortage of existing test methods that cannot perform closed-loop testing of field safety stability control systems, a remote closed-loop test method for safety stability control systems based on step-by-step implementation is proposed. Using the simulation results of real-time digital simulation system (RTDS) as the signal source, a remote test platform architecture integrating laboratory and field safety and stability control devices is designed, key modules such as platform management system, test master and test terminal are developed, specific solutions are given for platform communication, and a remote closed-loop test procedure is formulated. Finally, a pilot application is carried out with an actual power grid security and stability control system as an example, and the effectiveness of the proposed method is verified.
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