To prevent or mitigate corona discharge, you can follow some best practices and recommendations, such as designing and maintaining the transmission line properly, choosing the right materials and equipment, monitoring and controlling the corona discharge regularly, and following the safety standards and regulations. Designing and maintaining the transmission line properly involves selecting the optimal voltage level, conductor size, conductor spacing, bundle configuration, insulator type, and corona ring size. Choosing the right materials and equipment involves using high-quality conductors, insulators, sensors, alarms, controllers, and analyzers that can withstand corona discharge and reduce its effects. Monitoring and controlling the corona discharge regularly involves using the appropriate measurement methods, techniques, and systems to detect, reduce, and manage corona discharge. Following the safety standards and regulations involves complying with the codes, guidelines, and limits set by the authorities and the industry for corona discharge and radio interference.