DEVELOPMENT AND TESTING OF A CATHODIC PROTECTION DEVICE WITH AN AUTONOMOUS POWER SOURCE
The article reviews the main existing systems of electrochemical protection of pipelines. A geographical analysis of the main oil and gas fields of the Russian Federation is carried out. The existing difficulties associated with the transportation of mineral resources from the place of production to the consumer, the main of which is the corrosion damage of steel pipelines, are identified. The basic method of combating corrosion damage, which is regulated by state standard of the Russian Federation at all stages of design and operation, is given - electrochemical protection. Present circuit diagram of operation of electrochemical cathode protection system, having DC source connected to protected structure and anode electrode, is shown. The structure and operation principle of the device designed by the authors, which allows to provide electrochemical protection of oil and gas structures and structures, are considered. As an autonomous power source of the electrochemical protection system, a capacitive storage device - an ionizer module - was chosen, the expediency and efficiency of which are justified by the authors. An electrical model of operation of an electrochemical protection device has been developed, consisting of such basic elements as an electric energy source, an increasing voltage converter for charging a battery, a lowering converter of an ionizer module, an ionizer and a power inverter. Based on the electrical model, a mock-up model of the proposed device has been developed and constructed. Using the oscilloscope of AKIP grade, the dependencies of the main electric parameters of the mock-up plant on time - current intensity and voltage of the charge system of the ionizer module - were investigated. Joint operation of pulse voltage stabilizer and capacitive accumulator is considered. The positive effect of the developed electrical system compared to existing analogues was revealed.