Distributed Robust Optimal Scheduling of the New Interconnected Power System with the Inter-province and Intra-province Considering Moment Uncertainty of Source Load Power

doi:10.12204/j.issn.1000-7229.2023.07.011

Abstract

Abstract:

To promote the construction of a novel interconnected power system in China—one featuring a high proportion of clean energy access and significant trans-regional power transmission proportion—a new optimal dispatching method is proposed that considers the uncertainty of source load power moment. This approach aims to mitigate the impact of source load uncertainty on cross-regional clean energy consumption and intra-provincial power balance. First, a two-level optimal dispatching mode for an innovative interconnected power system between and within provinces was designed under the planning market dual-track system. Second, the uncertainties of wind and solar power generation and load power were characterized by the moment uncertainty set, and the resulting robust conditional risk measurement model of wind and light abandonment distributions was proposed. Finally, to minimize total power purchase cost between and within provinces, a novel distributed robust, coordinated optimal dispatching model for an interconnected power system was established, and the model was transformed into a semi-definite programming problem, more readily solvable by applying the dual optimization theory. Numerical simulation results show that the proposed model promotes the cross-provincial and cross-regional consumption of clean energy in the western region, reduces the operational cost of the receiving-end system, and effectively improves the ability of the system to handle uncertain fluctuations in the source-load power.

Key words: clean energy consumption, new interconnected power system, inter- and intra-province coordination, planning market power allocation, distributed robust optimization

CLC Number:

TM732

YANG Hongming, YIN Bangzhe, MENG Ke, YU Haifeng, ZHOU Nianguang, XU Zhiqiang. Distributed Robust Optimal Scheduling of the New Interconnected Power System with the Inter-province and Intra-province Considering Moment Uncertainty of Source Load Power[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(7): 98-110.

Figures/Tables 12

Fig.1 The intra-provincial and inter-provincial two-level optimal dispatch mode of the new interconnected power system

Fig.2 Expected and variance distribution of net load power

Fig.3 Two-level optimal dispatching framework of the new interconnected power systems

Fig.4 Intra-provincial and inter-provincial dispatching power optimization results of model 3

Fig.5 Inter-provincial planning-market scheduling power optimization results

Fig.6 Standby capacity configuration of the receiving system

Table 1

Fig.7 System operation cost under different confidence levels of model 3

Fig.A1 Forecast of typical daily load and scenery output

Table A1 Operating parameters of various types of units in the province

Table A2 Inter provincial tie line parameters

Table A3 Parameters of various types of units in the inter provincial market

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