摘要：Ultra high voltage direct current(UHVDC) electrode sites choosing become more and more difficult due to the limited land resource, and it results in an urgent requirement of common electrode technology. The optimized designing method of two kinds of electrodes commonly used by multi converter stations is studied in this paper. The performance criteria and the rational jointing style between electrode lines and electrodes are analysed and determined at first, based on which, the mathematical model of the two kinds of electrodes is established,and an inequality equation set is formed to satisfy the relative standards of environmental impact on ground electrodes. Consequently the optimized designing method is presented through simplification of the model. After all, a specific example is given based on the parameters of Southwest Hydroelectric Project in China, in which two electrode sites had been pre chosen. The results show that, tens of plans of the two kinds of electrodes together with their electrode performances can be provided based on the presented method. The errors of current distribution ratio in all the examined plans are maintained about 1%, the maximum error of earthing resistance is 7% and the maximum error of step voltage is 4%, which prove the engineering practicality of the method.

摘要：For the purpose of testing and analysing the corona characteristics of UHVDC bundle conductors, UHVDC corona cage would be built in China. Corona cage is one of the indispensable equipments for conductor corona performance researches. Tests of conductor co- rona characteristics in corona cages can overcome the shortages of those with test *** dimensions of several corona cages constructed overseas were introduced in this paper. Based on foreign experiences and the requirement of State Grid Corporation of China, the UHVDC corona cage was designed as double-cage, double-layer, three-sections, and catenary shape with the size of 70 m×22 m×13 m. The corona loss measurement system, radio interference measuring system, and the audible noise measuring system are also detailed, including the measurement theory, connection with the cage, the parameters and the designing basis. The UHVDC corona cage has been put into service. It now undergoes a large amount of audible noise and radio frequency interference tests.