SU64399A1 - Machine for plotting load on traction substations - Google Patents

Description

The work of building load graphs on the traction substations is very labor-intensive and laborious. In essence, it is reduced to the sequential summation of a series of curves of current (or power) consumed by individual trains over time.

In order to facilitate this work and to introduce elements of automaticity, it was proposed to use special instruments for constructing a load graph using a switched resistance system and electrical measuring instruments.

The proposed machine for plotting the load, similarly to the known devices of this type, contains a system of resistances switched by moving contacts made in the form of current consumption graphs by individual trains, and an electrical recording device recording the current in a circuit of the resistance system.

The essence of the present invention is to use a series of contact drums carrying the above-mentioned moving contact graphics and connected through controlled individual couplings to the drive shaft of the machine, rotated by a constant speed motor and coupled to an auxiliary switch serving to automatically turn on and off the indicated clutches at appropriate times. Such an implementation of the maschina enhances its automatic operation.

The summary of the invention is illustrated in FIG. 1 which shows a diagram of one of the nodes of the proposed machine (contact schedule in expanded form and a system of resistances switched by it), and FIG. 2 is a schematic diagram of the entire machine.

The principle of the proposed machine is based on the following. Let there be a series of fixed contacts 1 connected through resistances 2 and ammeter 3 with the plus of the source of electrical energy (in terms of their magnitude, resistances 2 are all the same). Contacts 1 are switched by a movable plate 4 of metal, connected to the minus of the specified energy source. The shape of plateina 4 (its veel forming) corresponds to the gra; the current consumption (or power) of the train as a function of time. .,. 11SCH.RRE THEATIC CHLD: 4XY uniform ckopfiaCTifro in the direction indicated in FIG. 1 arrow, if the current circuit closes, the more - the height (i.e., the ordinate) of the plate is at any given time, the greater the number of contacts 1 it will close and the greater will be the current in the circuit. With a sufficient number of comtes: com the recording device (ammeter) included in itfen bi. Writing a line on the tape, under (the upper generatrix of the figure. If you take several such instruments, each of which corresponds to one train, then by turning on these instruments through a common measuring device, MQjKHo. find the curve of the total load. plates 4 in each individual device must correspond to the time of departure of the train according to the estimated schedule of train movement. By including an energy meter and a thermal copy in the circuit, it is possible to obtain, at a known scale, substation energy consumption and temperature Lastly, the machine contains a series of reels 5 on which thick paper is applied with cut-out current consumption trains. On the same reels there are flexible brass strips-contacts 1 that make contact with the drum in the cut-out places. Each strip is attached to resistance 2 1000 ohms. Thus, one resistance will pass a current of 25 mA when the supply voltage is 100 V. Each of the drums carries a sheet of paper with cutouts depicting a graph of consumption current train in the whole section between substations m govymi E (or each, the section between the stations). The drums are mounted on a common axis 6, but are connected to it through friction discs. Axis 6 is rotated by an elec- tron, h | skim5 engine 7 y CKOJJOCJJWO Eng / YVSh f ij M:; 1, c9, the drums 5 are stationary in a zero position, since their rotation is delayed by the locking electromagnets 8. In addition, there is a switch consisting of a metal disc 9, along which four fixed brushes 10 slide, connected to the locking electromagnets. The disk is covered with a matte, which is divided into 24 parts. The disk is connected to axis 6 through transmission 11 so that at the selected scale one revolution of the disk corresponds to 24 hours of the day, and one revolution of axis 6 corresponds to the longest travel time of the train through the power section. In the paper covering the disk 9, holes are punched in the places corresponding to the departure time of the trains. As the disc rotates in these holes, closures of brushes 10 will occur on disk 9, as a result of which the corresponding stop electromagnets 8 will turn on. The last, exciting, reels 5, which are immediately carried away by axis 6 and begin to rotate. Thus, the rotation of the drums will begin at the command of the switch 9-10, and ammeter 3 will record the load curve of all trains. In the machine shown in FIG. 2, only four drums are indicated, i.e. two for each direction. Their number depends on the types of trains and the density of traffic on the site. It can be assumed that for the most dense suburban movement it will be enough to have 8-10 such drums in the maschine. The proposed machine allows you to automate a very time consuming work on the limit

power of traction substations of electric railways.

The cost of manufacturing the machine is low, and the accuracy of work, depending on the size of the drums, can be as high as 1-2%.

The production and management of machine blanks are simple and can be easily mastered.

Subject invention

A machine for plotting the load on the traction substations, containing a system of resistances, switched by moving contacts made in the form of current consumption graphs of individual trains, and an electrical recording device that records the current B of the resistance system circuit, characterized by using a number of contact drums the above-mentioned moving plots are graphs and connected through controlled individual couplings to the drive shaft of the machine, rotated by a constant speed motor and coupled with an auxiliary switch that serves to automatically turn on and off these clutches at appropriate points in time.

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