Abstract
The integrated power and natural gas energy system (IPGES) is of great significance to promote the coordination and complementarity of multi-energy flow, and it is an important carrier to increase the proportion of wind power accommodation and achieve the goal of carbon emission reduction. In this paper, firstly, the reward and punishment ladder-type carbon trading model is constructed, and the impact of the carbon trading mechanisms on the carbon emission sources in the power system is comparatively analyzed. Secondly, in order to achieve a reasonable allocation of carbon resources in IPGES, a bi-level optimization model is established while taking into account the economics of dispatching and the requirements of carbon emission reduction. Among them, the outer layer is the optimal carbon price solution model considering carbon trading; in the inner layer, considering the power system constraints, natural gas system constraints, and coupling element operation constraints, a stochastic optimal dispatching model of IPGES based on scenario analysis is established. Scenario generation and reduction methods are used to deal with the uncertainty of wind power, and the inner model is processed as a mixed integer linear programming problem. In the MATLAB environment, program the dichotomy and call the Gurobi optimization solver to complete the interactive solution of the inner and outer models. Finally, case studies that use an integrated IEEE 39-bus power system and Belgian 20-node gas system demonstrate the effectiveness and scalability of the proposed model and optimization method.
Highlights
In recent years, with the rapid development of economy and society, the ecological system is seriously endangered, and the human society is faced with an increasingly serious energy depletion crisis and environmental pollution
In order to analyze the effect of P2G on the improvement of wind power accommodation and system carbon emission reduction capabilities of integrated power and natural gas energy system (IPGES), the following two cases were set up for dispatching of IPGES
In case 1 and case 2, both of them are in the reward and punishment ladder-type carbon trading with the benchmark carbon price of 20 $/t, and the objective function is to consider only the operation cost without considering the carbon trading cost
Summary
With the rapid development of economy and society, the ecological system is seriously endangered, and the human society is faced with an increasingly serious energy depletion crisis and environmental pollution. The energy power system has undergone many unprecedented changes. Coal is the dominant fuel for power generation; its share fell 1.3 percentage points to 35.1% in 2020. The share of renewables rose to record levels in 2020 (11.7%), with the combined share of renewables and gas-fired power (35.1%) equal to coal for the first time. Natural gas is the dominant fuel used for power generation in North America, CIS, the Middle East and Africa. While in Asia, coal comprises 57% of the generation mix, a far higher share than any other region
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