{'fraction_non_alphanumeric': 0.02038369304556355, 'fraction_numerical': 0.0, 'mean_word_length': 5.900826446280992, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Expansion Planning of Transmission Grid Considering Congestion Surplus

Transmission grid planning under an electricity market with separated power generation, transmission, distribution and sale links, is facing more challenges, due to the market uncertainties. In this paper, based on marginal price, an optimal planning model of transmission grid considering power transaction is proposed to maximize congestion surplus. Adopting network voltage and investment budget constraints, dynamic differential evolution algorithm was used to figure out the model, yet, in lower rate of convergence. As a result, we combined the advantages of different iteration strategies, and proposed an improved dynamic differential evolution algorithm. In the simulations based on a west grid in China, algorithm convergence and validity are analyzed.