With the rapid development of economy, strengthen the continuous construction of national infrastructure, etc., many industry demand for steel, steel enterprise capacity expands, at the same time, the steel enterprise...With the rapid development of economy, strengthen the continuous construction of national infrastructure, etc., many industry demand for steel, steel enterprise capacity expands, at the same time, the steel enterprises to positive response to the call of national energy conservation and emission reduction, using plant waste heat green development is the only way to realize the transformation and upgrading of the steel industry. This paper will be mainly for the domestic steel enterprise 6kV system short circuit current exceeds the limit and take the restrictive measures for detailed analysis and discussion for the industry reference.展开更多
The use of renewable energy is essential for addressing global climate change,and offshore wind power plays a critical role in achieving this goal.As nearshore resources become saturated,the focus of offshore wind pow...The use of renewable energy is essential for addressing global climate change,and offshore wind power plays a critical role in achieving this goal.As nearshore resources become saturated,the focus of offshore wind power development is shifting to deep-sea areas.Deep-sea wind power transmission schemes must prioritize lightweight designs and low costs to enhance overall economic and technical feasibility.Currently,four lightweight offshore wind power transmission schemes have been identified:low-frequency alternating current(LFAC)transmission,high-voltage direct current(HVDC)transmission utilizing uncontrolled diode rectifier units(DRU-HVDC),DRU-MMC parallel-connection hybrid rectifier transmission(PCDRU-MMC),and DRU-MMC series-connection hybrid rectifier transmission(SCDRU-MMC).Four schemesare examined,advantages and disadvantages in various scenariosare outlined,technical performanceare analyzed.A comprehensive economic assessment of each scheme is conducted for deep-sea environments far from load centers.The results indicate that LFAC transmission effectively reduces transmission losses,whereas DRU-HVDC has limitations in terms of voltage support and black-start capability.In contrast,hybrid rectification solutions such as PCDRU-MMC and SCDRU-MMC combine the economic benefits of DRU-HVDC with the flexibility of modular multilevel converters(MMCs),thereby enhancing system reliability and efficiency.展开更多
文摘With the rapid development of economy, strengthen the continuous construction of national infrastructure, etc., many industry demand for steel, steel enterprise capacity expands, at the same time, the steel enterprises to positive response to the call of national energy conservation and emission reduction, using plant waste heat green development is the only way to realize the transformation and upgrading of the steel industry. This paper will be mainly for the domestic steel enterprise 6kV system short circuit current exceeds the limit and take the restrictive measures for detailed analysis and discussion for the industry reference.
基金Supported by the Science and Technology Project of China Southern Power Grid Corporation(030000KC23040118).
文摘The use of renewable energy is essential for addressing global climate change,and offshore wind power plays a critical role in achieving this goal.As nearshore resources become saturated,the focus of offshore wind power development is shifting to deep-sea areas.Deep-sea wind power transmission schemes must prioritize lightweight designs and low costs to enhance overall economic and technical feasibility.Currently,four lightweight offshore wind power transmission schemes have been identified:low-frequency alternating current(LFAC)transmission,high-voltage direct current(HVDC)transmission utilizing uncontrolled diode rectifier units(DRU-HVDC),DRU-MMC parallel-connection hybrid rectifier transmission(PCDRU-MMC),and DRU-MMC series-connection hybrid rectifier transmission(SCDRU-MMC).Four schemesare examined,advantages and disadvantages in various scenariosare outlined,technical performanceare analyzed.A comprehensive economic assessment of each scheme is conducted for deep-sea environments far from load centers.The results indicate that LFAC transmission effectively reduces transmission losses,whereas DRU-HVDC has limitations in terms of voltage support and black-start capability.In contrast,hybrid rectification solutions such as PCDRU-MMC and SCDRU-MMC combine the economic benefits of DRU-HVDC with the flexibility of modular multilevel converters(MMCs),thereby enhancing system reliability and efficiency.
