SU1125700A1 - Device for off-loading region of power network - Google Patents

Abstract

ELECTRIC NETWORK AREA UNLOADING DEVICE, the consumer of which is powered in several KIM lines from the substation with sectional switches, the opening of which is used to transmit the signal to the imium receiving end, containing the starting unit, load disconnecting unit, load disconnecting lock unit, switch-on unit load, the first output of the starting block is connected to the input of the load shedding block, and the second output is connected to the first input of the switch-on load cell and the output of the load shed block is connected to the input of the block The latching of the load disconnection, the output of which is connected to the second input of the load switching unit, the outputs of the load breaking unit and the load switching unit are connected to the load switch actuators, characterized in that, in order to increase the reliability of the power supply to the consumers by maintaining the electrical connection between the receiving and supply ends Two phases of the line, at the receiving end of the line, current transformers in each phase are installed, which are connected to the inputs of the starting block, containing current relays in three phases,. time relay and intermediate relay, and sequentially (P midinng the disconnecting contact of the current relay of the disconnected phase, the closing contacts of the current relays of the on phases and the winding of the time relay form the first chain connected to the operating voltage buses, disconnecting contact of the time relay, connected in series with the intermediate winding SP the relay forms a second chain connected to the operating voltage buses, the disconnecting contacts of the intermediate relay are the outputs of the starting block.

Description

1 The invention relates to an aaofm electrical network. Devices are known for unloading the area of the electrical network, the consumers of which are fed several meters to the line from the substation with sectional switches, the disconnection of which is used to transmit a signal to the receiving end of the line containing at the last actuator flj. The disadvantage of these devices is that the Three Phases of the phase line come from here and the timely de-energization of one of the bus sections of the receiving, substation and consumer consumers as a consequence of the electrical installation. Most technical to the invention in terms of technical capacity is a device for unloading the area of the electrical network whose consumers are fed by several lines and meters from a substation with sectional outlets, containing {1) a line switch, and an executive body at the end of the circuit. , yri in executive number # & Orty enter the control element cathedeed on the adjacent section of the pulley and accelerate the ATS, the first input to the co (by | Dklz (related to the control element on the p: geii1 on the adjacent section of the second SECOND input is connected to the first output of the starting block, the third input is connected to the output The block of the viewer is at the cutter, and the OUTPUT is connected to the drive of the seka onio {h extractor 1 and the input of the linear jigger of the receiving end of the line and. In this device, the signal of transmitting ishgles is on; the output of the load is served by the switching off of the phases of the second winch loop and signal transmission to turn on p It disconnects the load - once again disconnecting the track of the second phase, the VL circuit from the supply substation 2J. However, the three phases are disconnected by the VL circuit with its subsequent automatic restart and the accelerated AVR of the section switch at the receiving substation with a time of 0.8- 1.0 s reduces the reliability of power supply to consumers and, in some cases, 00 leads to self-unloading of electrical installations. The aim of the invention is not to increase the reliability of power supply to the power grids by maintaining electrical communication between the receiving and feeding ends of the two phases of the line. The goal is achieved in that the device for unloading the area of the electrical network, whose consumers feed on several lines from the substation with partitioned switches, whose disconnection is used to transmit a signal to the receiving end of the line containing the starting block of the load-disconnecting block latching the load disconnection, the load switching unit, the first output of the starting unit is connected to the input of the unit, the load is removed, and the second output is connected to the first input of the load unit, the first output of the unit and the load disconnection is connected to the input of the shutdown unit 4 kSa1. load, the gateway is connected to the secondary unit of the switch-on unit. the loads, the outputs of the load disconnecting unit and the plug-in power unit are connected to the load drives; at the receiving end of the line current transformers are installed in 1 phase, which are connected to the inputs of the starting unit containing current relays in three phases, the relay and the secondary relay, What is more, a series-connected break-opener current-phase contact of the ACCESS phase and a sub-contact of the current relay of the switched-on phases and the time relay winding form a first chain {connected to the operating fault buses, disconnect minutes contact time switch connected to the winding posledovatelyyu intermediate relay accurately, forms a second chain connected to the busbars operational voltage razgvlkayuschie contacts intermediate relay J1 is "starting with block outputs. Figure 1 shows the functions x and the scheme of the device for unloading of the e-fuels 5 in figure 2 is a diagram of the starting block. The device consists of a switch 2 of line 2 located at the transmitting end, which serves to transfer commands from the supply line to the receiving end of the line by disconnecting one phase. The system also includes an actuator located at the receiving end consisting of current transformers 3, a starting unit 4 made, for example, with three AC relays, a time switch and an intermediate relay and used to monitor the absence of load in phase A and load currents in phases B and C, whether "{w 2 and time-delay start-up, block 5 disconnecting the load, performed by means of an intermediate two set of relays, which are used to disconnect switches 7 and 8 of the load, start-up scattering 6t Key load ki, the load unit 6 incorporating performed via intermediate turnips and serving for reducing power turns off avtmaticheskogo consumers fixing unit 9 disconnecting load made via time switches and intermediate switches and serving for storing the actuation unit 5 is cut-off load and run. In conjunction with the starting block 4, block 6 switch on the unit. The triggering organ includes the current relay 1СЬ-12 current coil, the current transformer 3 turns on at the current, the current in each phase is controlled, the contact then the 13-15 coaxial relays acting on the coil 16 time relays, pin 17 of which By connecting with the time, the time will disconnect the line damage caused by the CTBjnoT to the coil 18 of the intermediate relay (used to propagate the time relay contacts), contacts 19 and 20 of which are used to start the shutdown unit and the load enable unit. The device works in the following way. When phase A of circuit breaker 1 is turned off for 0.8 seconds, the load current in phase A is absent, the starting unit 4 is activated, which, in the time frame, longer than the line fault trip time (about 0.5 s), triggers the block 5 shutdown loading. The block 5 disconnects the load, which disconnects the switch disconnectors 7 and 8 and starts the block 9 of the disconnecting load, the latter with the support of time, longer time of the disconnected phase A of line 2 (about 1.5 s), triggers and turns on load. When the phase A of switch 1 is switched off again for a period of 0.8 seconds, the load current in phase A is disconnected on the line. The starting unit 4 triggers. the output signal of which acts on the load switching unit 6, the latter operates, turns on the load switches 7 and 8, and returns the circuit to the initial position, ready for further work. The use of the proposed device for transmitting information and unloading consumers makes it possible to significantly increase the reliability of the power supply of consumers, to exclude high-frequency channels for the transmission of television signals in the device for unloading the area, and the electrical network, and prevents self-unloading of consumers' electric motors.

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Claims (1)

DEVICE FOR UNLOADING THE ELECTRIC NETWORK REGION, consumers of which are fed along several lines from the substation with sectional switches, the disconnection of which is used to transmit a signal to the receiving end of the line containing the starting block, 'load disconnect block, load disconnect lock block, load switch block, the first the output of the starting block is connected to the input of the load shedding unit, and the second output is connected to the first input of the load shedding unit, the first output of the load shedding unit is connected to the input of the unit ^iksatsii; ........ 7 ¹ ....... load disconnection, the output of which is connected to the second input of the load switching unit, the outputs of the load disconnecting unit and the load switching unit are connected to the drives of the load switches, characterized in that, in order to increase the reliability of power supply to consumers by maintaining electrical communication between the receiving and supply ends of the two phases lines, at the receiving end of the line, current transformers in each phase are installed, which are connected to the inputs of the starting block, containing current relays in three phases, a time relay and a daily relay, wherein the disconnected contact of the disconnected phase current relay is connected in series, the closed contacts of the switched on current relays and the time relay winding form the first chain connected to the operational voltage buses, the disconnected contact of the time relay connected in series with the intermediate relay winding, forms the second chain connected to the buses of the operational voltage, the NC contacts of the intermediate relay are the outputs of the starting block. SU .... 1125700> 1 1125700