Translated Abstract
Along with the development of our oil drilling technology, now oil and natgas output has got a very big leap. In 2007,the oil occupys 19.7 percentages of the primary energy in our nation, with the natgas 3.3 percentages. Our goverment is adjusting the primary energy structure step by step, expected after 2020, the proportion of petroleum and natural gas will be increased from the current 20% to about 35%. If not, the energy supply will not meet demand, and the goal that reaching the level of moderately developed countries by the middle of the 21 century will not be realized. It follows that oilfield exploitation plays an important role in national economic development. As oil rig ＂oil to electricity＂ project‘s development, the oilfield exploitation gains considerable economic and social benefits. But the harmonic caused by nets electricity drag system pollutes the power grid more seriously, and makes an impact to the power grid and drive system. Therefore the oilfield power quality management becomes the top priority,and various management plans arise at the historic moment. Among them, the active power filter (APF) becomes a good choice for power quality management because of its good filtering effect, high compensation precision, fast response speed and good effect in suppression voltage fluctuation. Due to the particularity of the applications, a dedicated human-computer interface is needed for the active power filter to help the oilfield operating personnel. The main task of this paper is to design a unitized human-computer interface (HMI) for active power filters exclusive used for oilfield rigs. So the paper discusses the design scheme of the human-computer interface, the function realization design and telecommunications principle.This paper firstly introduces the human-computer interface of the special active power filter, analyses its research background and valuable significance, at the same time, analyses the generation and damage of the oilfield power quality problems. After these discussions, the paper expounds the design idea and then comes up with several solutions. The main task of this paper is studying the function modules of the human-computer interface, includes data display, instruction convey, long-range control and data display. The HMI conmunicates with DSP by Modbus protocol, DSP uploads data to HMI for display, while the HMI download instructions to DSP for performance. For telecommunications, the remote computer as a upper computer should have multiple addressing ability. So the remote computer conmunicates with HMI by ModbusTCP protocol, then it can realize the function of addressing more APFs.This unitized human-computer interface realize the functions of local data display and long range data display, local control and long range control, all these functions meet the design requirements. This standardized human-computer interface provides templates for those power quality control devices used in oilfields.
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