Method and system for detection of standby status in linear and non-linear charges connected to the electricity mains and automatic disconnection thereof

Abstract

The method permits the detection of ‘standby’ state’ in linear and non-linear loads connected to the power grid and their automatic disconnection, and comprises at least the detection of the normal operating state of at least one load by means of detection, and obtaining the maximum value of the current in said operating state for the determination of the ‘standby state’ of the at least one load.

1 .- 22 . (canceled) 
     
     
         23 . A method of determining the maximum value of a current in at least one load in a normal operating state, said method comprising:
 i) obtaining a first current value in the at least one load;   ii) obtaining a later current value in the at least one load after a pre-established interval of time I;   iii) determining if the later current value is greater than the first current value;   iv) storing the greater of the first current value and the later current value in memory; and   v) repeating stages i) to iv) a pre-determined number N times.   
     
     
         24 . The method of  claim 23 , wherein the pre-established interval of time I is between 0.1 ms and 1 ms. 
     
     
         25 . The method of  claim 24 , wherein the pre-established interval of time I is 0.5 ms. 
     
     
         26 . The method of  claim 23 , wherein the pre-determined number N is between 20 and 200. 
     
     
         27 . The method of  claim 26 , wherein the pre-determined number N is 40. 
     
     
         28 . The method of  claim 23 , wherein stages i) to v) for obtaining the maximum value of the current of a load in normal operating state are repeated a number of times M and the average of all the maximum current values obtained is determined. 
     
     
         29 . The method of  claim 28 , wherein M is between 2 and 16. 
     
     
         30 . The method of  claim 29 , wherein M is 8. 
     
     
         31 . A method for the detection of ‘standby’ state’ in linear and non-linear loads connected to the power grid, said method comprising:
 a. obtaining a maximum start-up current value in each at least one load; 
 b. obtaining a maximum current value in each at least one load at a specific moment; 
 c. obtaining a maximum current value in each at least one load in the normal operating state according to  claim 23 ; 
 d. comparing the maximum current value obtained in each at least one load at the specific moment and the maximum value of the current in each at least one load in the normal operating state; 
 e. comparing the maximum current value obtained in each at least one load at the specific moment and the maximum start-up current value of each at least one load; and 
 f. establishing said ‘standby’ state’ when the maximum current value obtained in each at least one load is less than a percentage P of the maximum value of the current of each at least one load in the normal operating state. 
 
     
     
         32 . The method of  claim 31 , further comprising:
 determining whether the maximum current value obtained at the specific moment in each load is greater than the maximum current value in the normal operating state stored in the memory; and   replacing the maximum current value for the normal operating state stored in the memory with the maximum current value obtained at the specific moment when the maximum current value for the specific moment is greater than the maximum current value for the normal operating state.   
     
     
         33 . The method of  claim 31 , further comprising:
 determining whether the maximum current value obtained at the specific moment in each load is less than the maximum current value in the normal operating state stored in the memory and greater than a percentage P of the maximum value of the current of each load in the normal operating state; and   determining that the load is in normal operating state when the maximum current value for the specific moment is less than the maximum current value for the normal operating state stored in the memory and greater than the percentage P of the maximum value of the current of each load in the normal operating state.   
     
     
         34 . The method of  claim 31 , further comprising:
 determining whether the maximum current value obtained at the specific moment in each load is less than the maximum current value in the normal operating state stored in the memory and less than a percentage P of the maximum value of the current of each load in the normal operating state; and   determining that the load is in ‘standby’ state when the maximum current value for the specific moment in each load is less than the maximum current value for the normal operating state and less than the percentage P of the maximum value of the current of each load in the normal operating state.   
     
     
         35 . The method of  claim 31 , further comprising:
 determining whether the maximum current value obtained at the specific moment in each load is less than the maximum current value in the normal operating state stored in the memory and less than a value U of the current of each load in the normal operating state; and   determining that the load is disconnected when the maximum current value obtained at the specific moment in each load is less than the maximum current value in the normal operating state stored in the memory and less than the value U of the current of each load in the normal operating state.   
     
     
         36 . The method of  claim 32 , further comprising:
 determining a first value as the maximum start-up current value obtained minus a hysteresis HS value;   determining a second value as the maximum start-up current value obtained plus the hysteresis HS value;   determining whether the maximum current value obtained at the specific moment in each load is between the first value and the second value; and   determining that the load is in ‘standby’ mode’ from the start-up or connection when the load obtained at the specific moment is between the first value and the second value.   
     
     
         37 . The method of  claim 31 , wherein P is between 30% and 50%. 
     
     
         38 . The method of  claim 37 , wherein P is 50%. 
     
     
         39 . The method of  claim 35 , wherein U is approximately 100 mA. 
     
     
         40 . The method of  claim 36 , wherein HS is approximately 100 mA.