SU1231477A1 - Apparatus for recording operation of relay protection and automatic equipment - Google Patents

Abstract

This invention relates to the field of electrical engineering. The purpose of the invention is to increase the reliability and reduce the cost of the device, reduce the total length of the communication cables and increase the reliability when registering the operation of sporadically operating elements of relay protection and automation. The device contains sensors 1, blocks 2 and 3 of discrete input, processor 4, memory block 5, symbol information signaling block 6, counter 7, having a variable counting factor equal to K + 1, decoder 8, block 9 combining, block 10 developing The busbars and busbars 11. Block 9 of the combination and block 10 of the isolation can be made in the form of diode assemblies with a common cathode and anode, respectively. The description shows an embodiment of the device operation algorithm. 2 Il. i (Loo so 4ib

Description

f. The invention relates to electrical engineering, and specifically to relay-UIHTE and automation (RZA) power systems.

The obtained data are used to objectively analyze the nature of the occurrence of accidents, to assess the correctness of the actions of the operational personnel to eliminate them, and to find out the causes of incorrect actions of the relay protection and control equipment and switching equipment.

The purpose of the invention is to increase reliability and reduce cost by reducing the number of discrete input blocks, reducing the total length of communication cables between sensors and discrete input blocks, and increasing the reliability when registering sporadically positive responses.

RZA elements by automatically checking the health of most of the blocks included in the device and the connections between them, as well as by unambiguously matching the number of the sensor group, the information processing from which is currently carried out according to the machine program, with the number of the group connected to the inputs of the discrete input block.

FIG. 1 shows a block diagram of the device; in fig. 2 is one of the possible embodiments of the device operation algorithm.

The device for registration of the operation of the relay protection device contains sensors 1 for operation of the relay protection device, the first discrete input unit 2, the second discrete input unit 3, the processor 4, the memory unit 5, the symbol information indication unit 6, the counter 7, the decoder 8 the integration unit 9, the unit 10 , tires 11 computers.

The inputs of sensors 1 (not shown) are connected to the contact or contactless outputs of relay protection devices, actuation. Which is registered. As sensors 1, high-speed relays can be used, in series with the contacts of which dividing diodes should be installed. Opto-electronic pairs (diode-diode, diode-transistor, etc.) can be used along with repeater relays. In this case, additional diodes are not required, since the photodiodes of these pairs, i.i. Phototransis of the mountain. Sensor input

14772

is the winding of the relay repeater or LED, and the output is a relay contact with a diode in series, or a photodiode (phototransistor)

opto-electronic pair. The sensors are grouped by combining the first findings within the group (the number of common points equals the number of groups K). The second terminals of the sensors with

® the same numbers within each group are also combined, and the number of common points N is equal to the number of sensors in the group and should not exceed the number of inputs

5 in the discrete input block. Blocks 2 and 3 of discrete input contain diode or transistor input keys, control logic, and channel grease transmitters (a set of microprocessor legs on the dial), providing communication between the unit and computer buses. The inputs of these blocks are potential or current. In the first case, bias resistors are connected between the inputs of blocks 2 and 3 and the pole. In BTqpoM current limiting resistors are installed in series with the inputs.

Along with 16 or 32 inputs for

0 yes 1 chik and 16 outputs on buses the discrete input block. Has a synchronization output, intended for connection to information exchange devices. Through it, for example, a K SIG signal is indicated. H processor on the completion of the operation of issuing data to the bus 11, the duration of the signal to 0.5 ISS. Processor vlocks 4 and memory 5 are typical and are used in

40 computers, data exchange and service signals between these blocks are performed via buses 11. The memory block consists of two parts: command constant and real time data.

45

Block 6 display symbolic information prints data on paper or storing them on a magnetic tape or disk.

50 Counter 7 and decoder 8 are elements of digital integrated technology, and the counter must have a variable counting factor equal to K +1.

55 Combining units 9 and 1 O isolation can be performed in the form of diode assemblies with a common cathode and a common anode, respectively.

The device works as follows.

After it is put into operation by applying voltage to a power supply unit (not shown), the latter generates a signal for common reset of all blocks 2, 3, and 6, as well as counter 7 and decoder 8.

After reset, the signals on all outputs of the counter 7, the decoder 8, and therefore, the common points of the sensor groups 1 and the inputs of blocks 2 and 3 are missing, i.e. logical zeroes are given. Then, a processor start is initiated, which starts to execute the registration program, which stores usus in a constant part of memory block 5. Since the interaction of the device blocks is related to the operation of the program, we will consider them in parallel.

At the beginning of the program (label PR0), processor 4 resets all cells in the operational part of the memory. Then (PR tag) signals from the outputs of blocks 2 and 3 are read through the computer buses to the processor general registers R1 and R2, respectively (the numbers of the registers are taken arbitrarily). The logical codes of these signals immediately after switching on the device should be zero. Therefore, the program compares the codes in the indicated registers with zero. Failure to comply with the equality condition indicates a malfunction of blocks 2 and 3, and at the same time a transition is made to the printing subroutine of the fault type (label PR4) followed by an alarm. If the contents of the registers R1 and R2 are equal to zero, the deregulation of the registration program continues. In this connection, in connection with the transmission of signals from the outputs of block 3 to computer buses, the state of a row of blocks of the device changes: block 3, through its synchronization output, issues a pulse signal for completing the data transfer operation, this signal arrives at the input of counter 7 and increases its content by 1. At the first output of the counter and the decoder 8 following it, the signal goes to the common point of the first sensor group 1. If some of the RZA devices of this group have been triggered, then the corresponding sensor contacts are closed and through them the decree nny signal (1) is supplied to the corresponding

inputs of block 2 discrete input. On the remaining inputs of this block, there is no signal, which corresponds to the presence of O. In addition, the signal from the first output of the decoder 8 through the combining unit 9 enters the P + 1 input of unit 3, and its presence indicates that the counter 7 and the decoder 8 are working properly. unit 3 receives signals from all outputs of counter 7, being in the aggregate the number of the controlled group in the binary calculus. After each next data transfer operation, the unit 3 also generates the specified pulse synchronization signal which increases the previous contents of counter 7 by 1, which leads to sending a signal from the next output of the decoder through the corresponding group of sensors to the inputs of unit 2 and through unit 9 to receive input + 1 of unit 3 Thus, the condition of all sensor groups — and the health of the counter and decoder — is monitored. When a signal appears at the K + 1 output of the decoder, it is fed through the isolation unit 10 to all the inputs of block 2, which allows checking its operability. By transferring the entered data to the busses 11, block 2 generates the next synchronization pulse, which transfers the counter to the zero state with signal removal on all outputs of the decoder. After this, a new sensor polling cycle begins, starting with the first group.

Returning to the program flowchart (label PR1), after reading the registers of the next group of sensors to registers R1 and R2, it is checked whether the contents of register R2 (signals from the output of discrete input block 3) are equal to K + 1. Failure of the condition indicates that at the moment in the register R1 are the position signals of the next group of sensors, and a transition is made to the point of the program PR2. Here, it is checked whether the bit unit is P + 1 of register R2, i.e. The signal from block 9 of the union at the output of block 2 failed. Failure to comply with the condition indicates a malfunction of the counter 7, the decoder 8 or block 2, which is printed by a special subroutine (PR4 tag). If the specified bit

equal to 1, then the contents of register R1 is transferred to another general purpose register, for example R3, where an EXCLUSIVE OR operation is performed (otherwise MODULE 2) with the contents of the RETRO cell of the operational part of memory block 5, where the status code of the same group is stored of sensors that were previously memorized. In the first cycle of the program, the RETRO cell codes for all groups are zero. Then the result of the specified logical operation is equal to the original contents of the register R3,

In the general case, after operation CONSTITUTION BY MODULE 2 in register R3, the unit will be equal to the bits with those numbers that correspond to the RZA devices that have changed their state by the time of the last sensor state polling cycle. If there was no change, the contents of the R3 register is zero, and a transition to the PR1 label will occur, checking the status of the next group of RZA devices.

Otherwise, the contents of register R1 (the new state of the sensor group) is entered into the RETRO cell in place of the old state code.

Next, using processor 4, the numbers of the active devices of the RPA are identified (label PR3)

The calculation is carried out by the expression

p j + 16 (i - 1),

where n is the number of the acted device; j - the number of bits in the register R3,

whose value is 1; i is the device group number (found in register R2).

The counted numbers and the moments of operation (the time count in the device can be performed using a timer connected to buses 11) of this group of devices is stored in a special area BR of the operational part of the memory block 5. Next, the occupancy of the display unit (print) is checked. If it is occupied, the transition to the PR1 tag is performed, otherwise the availability of information on the operation of the relay protection in the BR region of the memory operative part is checked. If it is not, then go to the specified label. In another case, subroutines are called to form a string of information about the operation of the next acting RZA device.

p subprogram of indication (printing) of the received line with the subsequent transition to the PR1 label.

Regardless of where the program came from — transition to the PR1 tag, the device blocks are prepared for this point in time for transmitting the status signals of the next group of RPA devices (as described above).

If after entering into the registers R1 and R2 signals of the status of the next group of devices, it turned out that the register R2 contains the number K + 1, this indicates that the register of R1 should transfer the signals of the logical unit from all the outputs of block 2, whose inputs they were connected at this moment to block 1 o razkki. Therefore, the content of R1 must be equal to 177777 (in the octal system). Failure to comply with this condition indicates a circuit failure.

input signals to block 2 or block 2 itself. In this case, a transition is made to a subroutine for printing information about the indicated fault onto the PR4i label.

R1 to the specified code there is a transition to a program point with a PR tag.

A switch to the PR tag indicates the end of the full cycle of checking the status of all device groups.

RZA and health of discrete input blocks, a counter and a decoder, and signal transmission circuits.

Thus, the implementation of this device requires two

discrete input block instead of 16 or 32 in a known device; which leads to a significant reduction in the cost and increase of reliability, and the performed monitoring of the operability of input circuits

information and discrete input blocks increases the accuracy of registration.

Claims (1)

Invention Formula A device for registering the operation of relay protection and automatics, containing sensors of operation, integrated by the first terminals in K groups, the first and second blocks of discrete input, information outputs of the blocks of discrete input are connected to the data bus connecting the pro-712 A cessor, a memory unit and a symbol information indication unit, characterized in that, in order to increase reliability, reliability and reduce cost, a counter, a decoder, a combining unit and an isolation block are entered into it, the synchronization output of the second discrete input block is connected to the input the counter, the P outputs of the counter are connected to the P inputs of the decoder and the second block of discrete input, K output order 2562/5 Circulation 728 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5 Production and printing company, Uzhgorod, Projecto st., 4 78 The remote inputs are connected respectively to the combined first terminals of the sensor groups and the inputs of the combining unit, the output of which is connected to the P + 1 input of the second discrete input block, the second outputs of the response sensors with the same numbers inside the groups are combined and connected with a common signal; the first block of discrete input and with the outputs of the isolation block, whose input is connected to the K + 1 output of the decoder.