Two-Stage Low-Carbon Economic Scheduling of Power System Considering Source-Load Carbon Intensity Coupling

doi:10.12204/j.issn.1000-7229.2023.12.003

Abstract

Abstract:

Aiming at the current low-carbon scheduling on the load side of a single low-carbon means, and the source and load sides of the carbon reduction method being relatively independent of the lack of linkage, this study establishes a two-layer low-carbon optimization scheduling model of a power system considering the source-load carbon potential coupling in the market a few days ago. The upper model is based on the ladder carbon trading market, calculates the carbon market transaction cost of the source side, and establishes a low-carbon economic dispatch model of the power system considering the source-load carbon potential constraints in accordance with the load classification, and solves the initial scheduling scheme of the units; the lower model adopts the theory of carbon emission flow, and calculates the carbon potential indexes of each node of the load side and the carbon emission responsibility sharing amount, and establishes a two-layer low-carbon optimization dispatch model of the power system considering the source-load carbon potential constraints. The lower model employs the carbon emission flow theory to calculate the carbon potential index of each node on the load side and the carbon emission responsibility sharing amount based on the scheduling scheme of the upper model, establishes a multi-type demand response model on the load side, and utilizes the user-side regulation ability to optimize the load distribution to further realize low-carbon system benefits. Finally, under the premise of wind power uncertainty modeling, an example analysis is conducted based on the improved IEEE 30-node system, and the results indicate that the scheduling method can effectively promote wind power consumption and reduce carbon emissions.

Key words: carbon emission streams, demand response, carbon emission constraints, low-carbon scheduling

CLC Number:

TM73

ZHANG Hanlin, WANG Ruizhe, LIU Youbo, YUAN Chuan, XIANG Yue, LIU Junyong. Two-Stage Low-Carbon Economic Scheduling of Power System Considering Source-Load Carbon Intensity Coupling[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(12): 28-42.

Figures/Tables 22

Fig.1 Schematic diagram of power system carbon emission flow and power flow

Fig.2 Two-stage model solution flowchart

Fig.3 Schematic of the improved IEEE 30 partition system

Table 1 Specific distribution of system load nodes

Fig.4 Prediction of wind power with diffierent confidence levels

Table 2 Scheduling results of different scenarios

Fig.5 Comparison of unit output and abandoned wind power under different scenarios

Fig.6 Comparison of wind power consumption rates under different scenarios

Fig.7 Load comparison before and after demand response

Table 3 Comparison of carbon emissions by partition under different scenarios

Fig.8 Carbon potential at each node before and after considering the source-load carbon emission constraint

Table 4 Comparison of system carbon potential under different scenarios t/(MW·h)

Fig.9 Impact of carbon trading price on system cost and carbon emission

Fig.10 Impact of carbon emission constraints on systemic carbon emissions

Fig.11 Carbon potential at each node before and after the low carbon treatment with carbon capture

Fig.12 Carbon emissions and operating costs by scenario

Table 5 Cost of carbon responsibility under different scenarios

Fig.A1 Load and wind power forecast

Table B1 Parameters of thermal power units

Table B1 Carbon emission price peak and trough time

Table B3 Load-side real-time carbon price

Table B4 Compensation price of demand response load

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