Patent SK-288183-B6 (SK)
Title: Method of setting decisive parameters of track circuit with digital track receiver and feeding end in order to achieve greater resistance to endangering currents
Inventor: FARAN ANTONIN
IPC: B61L1/18
Filed: 2008-09-18
Abstract: The invented method of setting decisive parameters of track circuit with digital track receiver and a feeding end in order to achieve greater resistance to endangering currents is carried out by using a safe evaluation of freedom or occupancy of a track circuit (KO) by a railway vehicle (KV) through the mediation of setting elements (NPN) of a feeding end (NK) and setting elements (NPP) of a receiver end (PK), whereby shunt state (SS) and an emergency state (HS) are assessed. In the first step, when the track circuit (KO) is in free state (VS), there are set all considered combinations of setting element (NPN) discretised values (H) of the track circuit (KO) feeding end (NK) outfit and setting element (NPP) discretised values (H) of the track circuit (KO) receiver end (PK) outfit, and after selected steps (ZK) differing from the nominal value (NHN)of the feeding end (NK) setting elements (NPN and from the nominal value (NHP) of the receiver end (PK) setting elements (NPN) of the tra ck circuit (KO) outfit by percentage units up to finding an optimal phase angle ({alpha}o) between the track voltage (UK), that is derived from the feeding track voltage (NUK), and between a reference voltage (UR) for the free state (VS) of the track circuit (KO), wherein the emergency state (HS) and the shunt state (SS) of the track circuit (KO) is calculated for that optimum phase angle ({alpha}o). In the second step, there is corrected the preceding setting of the feeding end (NK) outfit setting elements (NPN) and the receiver end (NP) outfit setting elements (NPP) of the track circuit (KO) according to considered combinations of the setting elements (NPN) of the feeding end (NK) outfit and setting elements (NPP) of the receiver end (PK) outfit successively step by step differing by percentage units from values pertaining to the optimal state according to the first step up to finding up a resulting phase angle ({alpha}v) of the track circuit (KO), and subsequently determining a firs t plurality of values of the optimal configuration (NPNO) of the setting elements (NPN)of the feeding end (NK) outfit and a second plurality of values of the optimal configuration (NPPO) of the setting elements (NPP) of the receiver end (PK) outfit of the track circuit (KO) up to achievement of the most favorable condition for both the shunt state (SS) and the emergency state (HS) of the track circuit (KO). In order to make this, in emergency state (HS) a track voltage (UKH) selected is to be the lowest possible enabling finding of a corresponding possible lowest value of the track voltage (UKS) in the shunt state (SS), whereupon so determined resulting value (VHN) of the setting elements (NPN)of the feeding end (NK) outfit and the resulting value (VHP) of the setting elements (NPP) of the receiver end (PK) outfit of the track circuit (KO) are fixedly set for the values of the track circuit (KO) receiver end (PK) outfit and thus do determined resulting phase angle ({alpha}v) between the track voltage (UK) and the reference voltage (UR) of the track circuit (KO), preferably in the form of configuration data of the track circuit (KO) with a digital track receiver (DKP) and the feeding end (NK). the track voltage (UK) and the reference voltage (UR) of the track circuit (KO), preferably in the form of configuration data of the track circuit (KO) with a digital track receiver (DKP) and the feeding end (NK).