On the issue of reactive power compensation in electrical systems
Journal Title: Вісник Національного технічного університету "ХПІ". Серія: Проблеми удосконалювання електричних машин і апаратів. Теорія і практика - Year 2018, Vol 32, Issue 1308
Abstract
Purpose. Investigation of the effect of reactive power compensation on the regime parameters and the stability of the electrical system. Determination of the permissible levels of reactive power compensation for the stability of load nodes and synchronous generators. Research of self-excitation area of synchronous generator at compensation of reactive power. Methodology. The mathematical models of the electric system in the form of nodal equations, which were solved by the modified Newton method, were used for the research. Mathematical modelling of stability of load nodes and synchronous generators was carried out in Matlab package. Results. Functional dependences of the degree of reactive power compensation on the parameters of the regime of the electric system according to the "deep input" scheme taking into account the daily unevenness of the load are obtained. The limits of reactive power compensation in electrical systems are set, taking into account the stable operation of load nodes and synchronous generator. It is established, that at a certain combination of parameters of an electric network with capacitive sequential compensation of reactive resistances of a stator circuit at compensation of reactive power of loading by means of batteries of static capacitors it is possible Violation of static stability of the type of self-excitation of synchronous generator. Originality. It is established that in networks with capacitive sequential compensation of reactive resistances of the stator circuit of synchronous generator, compensation of reactive power of loading by means of batteries of static capacitors can lead to violation of static Resistance type of self-excitation. Practical value. The technical and economic efficiency of the degree of compensation of reactive power on the parameters of the regime of the electric system according to the "deep input" scheme taking into account the daily unevenness of the load is established. The levels of compensation of reactive power of loading at which the value of a reserve coefficient of static stability on voltage in normal and repairs modes will be not less than the minimum ra-tioned value are determined. The value of the reserve coefficient of static stability on the active power in normal and repairs modes will be not less than the minimum rationed value, and the power factor of the generators should be close to the nominal.
Authors and Affiliations
I. V. Khomenko, M. F. Piskurev
Keywords
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- EP ID EP498987
- DOI 10.20998/2079-3944.2018.32.13
- Views 139
- Downloads 0
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