{'fraction_non_alphanumeric': 0.014366021236727046, 'fraction_numerical': 0.0, 'mean_word_length': 5.2578125, '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}}
Research on Fast Measurement Method of GIS Circuit Resistance without Removing Grounding Wire

In the process of installation and maintenance of GIS equipment, DC voltage drop method is used to measure the resistance of GIS equipment in order to check the connection status of electrical equipment. However, the grounding wire needs to be removed when measuring, which is cumbersome and inefficient. At the same time, this method may damage the structure of GIS equipment and induce high voltage from the surrounding charged equipment. Therefore, based on the topology network of GIS circuit, a fast measurement method of GIS circuit resistance without removing grounding wire was proposed by this paper. The GIS network was extracted into a multilevel T-type resistance network, and the corresponding resistance matrix was established through node voltage equation and loop current equation. The resistance matrix was resolved by applying DC excitation sources with two kinds of wiring schemes. This method can avoids the shortcoming of DC voltage drop method which needs to be measured many times and improves the working efficiency. And the influences of grounding network shunting and three-phase interphase shunting on measurement result were analyzed, and on this basis, the reasonable wiring scheme of applying excitation source was designed. After validating, the measurement results of proposed method were similar to DC voltage drop method. This method has great reliability and convenience. It has reference significance for measuring the resistance value of the same type of GIS equipment.