SU838892A1 - Device for disconnection of electric power plant generators by given total power - Google Patents

Description

mi output relays of generators disconnection. In this case, the total disconnected power of the generators is greater than or equal to the set one, and the order of disconnecting the generators is determined by station personnel {, 2,

However, turning off the generators of power plants for a given total power not by the minimum number of generators, the increase in the number of generators turned off by these devices, increases the likelihood of damage to the main heat engineering equipment of the power plant. This may lead to the development of a local accident in the power system, which will cause additional damage to the power stations due to equipment damage and, in the case of the power system, due to power shortage. In addition, shutting down not the minimum required number of generatopos reduces the aelichine of the mobile reserve of active power at the power station, which increases the recovery time of the normal mode. The consequence of this may be additional damage caused by interruption of the power supply to consumers.

The purpose of the invention is to disable the minimum required number of x-generators.

The goal is achieved by the fact that the device containing memory blocks whose inputs are intended to be connected to power generators, the outputs through the keys of the first group are connected to the inputs of the summing amplifier, and the control inputs are connected to the output of the task block, input which is designed to be connected to an emergency control system, the output of the summing amplifier is connected to the first input of the comparator unit, the second input of which is connected to the output of the task unit, the output of the comparator unit is connected to the control inputs An additional switch and output block whose outputs are intended for connection to the generator are additionally entered into a second group of keys, a max selector and logical memory blocks, and the inputs of the max selector are connected to the outputs of the memory blocks through the keys of the second group; TIs whose outputs are connected to the inputs of the output unit and control 388924

key inputs of the first and second groups.

The drawing shows the proposed device.

The device contains 1 memory blocks connected via normally open keys 2 to the inputs of the Max-selector 3, the outputs of which are connected via an electronic switch 4 to the logic unit: 5 memories, the outputs of which are connected to the inputs of the output block 6 and the control inputs of the keys 7, connected to the inputs of summing amplifier 8, the output of which is connected to one of the inputs of the comparison circuit 9, to the other input of which the output of task block 10 is connected. In addition, the task block 0 is connected to the control inputs of the blocks 1, the outputs of which are connected to cells} points 7. The output of the comparison circuit 9 is connected to the control inputs of the electronic switch 4 and the output block 6. The control inputs of the keys 2 are connected to the outputs of logical storage devices 5.

The device works as follows.

Signals from the generators' power sensors are received. 1 memory blocks. In the initial mode, they follow the power of the generators. When a signal is received from the task block 10, the memory blocks 1 are switched to the memory mode, and the outputs appear, paBffiiie, before the emergency power of the generators, which through the public keys 2 go to the max selector. The signal appears on one of the outputs of the max-selector corresponding to the maximum input signal. With equal power of all generators, the signals appear on all outputs. They arrive at an electronic switch that determines the sequence of connecting the circuits from the max-selector when more than one signal arrives simultaneously. The output signals of the electronic switch 4 are memorized by logic blocks 5 of memory; The keys 2 are closed and the keys 7 are opened. Signals about the power of the Generators go through the corresponding keys 7 to the summing amplifier 8. When the sum of the powers connected to the amplifier exceeds the predetermined unloading power from the task unit 10, a signal appears

Claims (2)

SUMMARY OF THE INVENTION A device for turning off power plant generators for a given total power, containing memory blocks whose inputs are used to connect to power sensors of generators, outputs through the keys of the first group are connected to the inputs of the summing amplifier, and the control inputs are connected * to the output of the task unit, input which is designed to be connected to an emergency control system, the output of the summing amplifier is connected to the per838892 6th input of the comparison unit, the second input of which is connected to the output b task lock, the output of the comparison unit is connected to the control inputs 5 of the electronic switch and the output unit, the outputs of which are designed to be connected to generators, characterized in that, in order to turn off the minimum number of generators, the second group is additionally introduced into it keys, Max selector and logical memory blocks, while the max selector inputs through the keys of the second group are connected to the outputs of the memory blocks, the outputs are connected to the inputs of the logical memory blocks, the outputs of which are connected to the outputs of the block and the control inputs of the first keys 20 and second group. Sources of information taken into account during the examination 1. USSR author's certificate ₂₅ No. 458071, -cl. H 02 J 3/24, 1973. 2. USSR Copyright Certificate No. 458072, cl. H 02 J 3/24, 1973. VNIIIPI Order 4459/83 Circulation 675 Subscription Branch of PPP Patent, Uzhhorod, st. Project, 4