METHOD FOR REGULATING POWER OF COMPENSATION FILTER INSTALLATION IN RAILROAD TRACTION ENERGY SUPPLY SYSTEM Russian patent published in 2015 - IPC B60M3/00 B60M1/00 H02J3/18 

FIELD: electricity.

SUBSTANCE: compensation filter installation (CFI) is switched on or off depending on values of measured actual displacement power factor tgφ_act at hours of high daily loads in the electric mains and CFI is switched off at hours of low daily loads at generated reactive power: tgφ_g._act = 0. Unit for computation of total voltage harmonic factor $$K_{{\text{U}}_{\text{(n)}}}$$ at busbars of 110 (220)kV and units for computation of displacement power factor for load tgφ and generated reactive power tgφ_g calculate $$K_{{\text{U}}_{\text{(n) off}}}$$ and tgφ_off at switched off CFI at hours of high loads supposing that CFI is in switched on position. CFI is switched off in conditions of $$K_{{\text{U}}_{\text{(n) off}}}\le K_{U_{\text{(n) perm}}}$$ and tgφ_off ≤ tgφ_perm, where $$K_{U_{(n)perm}}$$ and tgφ_perm are permitted values. At switched off CFI at hours of low loads actual value of $$K_{U_{(n)act}}$$ is measured and tgφ_g.on is calculated supposing that CFI is in switched on position. In conditions of $$K_{U_{\text{(n) act}}}\ge K_{U_{\text{(n) perm}}}$$ and tgφ_g.on = 0 CFI is switched on.

EFFECT: effective compensation of reactive power and reduced level of current and voltage harmonics.

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