RU168114U1 - CENTRALIZED RELAY PROTECTION AND CONTROL UNIT FOR SUBSTATION WITH HIGH-VOLTAGE DISTRIBUTION DEVICE PERFORMED BY BRIDGE CIRCUIT BREAKERS WITH LINE AND REPAIR CHAINS - Google Patents

Abstract

The utility model relates to the field of electrical engineering and the electric power industry and can be used for relay protection and control of a substation with a 110 or 220 kV switchgear made according to the “bridge with circuit breakers in the circuit lines and repair jumper on the side of lines” circuit. The device is intended for installation on panels and in control cabinets located on relay boards and control panels of substations. The device is designed to protect connections and control switches in the bridge circuit as an independent product. The device provides interaction with switches equipped with various types of drive mechanisms.

The technical result, to which the proposed technical solution is directed, is the unification of technical means and increasing the reliability of the device when used in a substation with a simplified circuit of a 110 or 220 kV switchgear in the form of a bridge. The expansion of the functional composition increases the degree of unification, since the same device is used to protect and control the volume of all connections of this switchgear, including power lines, power transformers and their switches.

Essence: The technical result is achieved in that in a centralized device for relay protection and control of a substation with a high voltage switchgear made according to the bridge circuit with circuit breakers in the first and second line circuits and a sectional switch containing medium and low voltage current transformers of the first and second power transformers , current transformers of the first and second lines, current transformers of a sectional switch, voltage transformers of medium and low voltage of the first and power transformers, differential protection units of the first and second power transformers, maximum current protection blocks of the highest voltage of the first and second power transformers, maximum current protection blocks of the medium voltage of the first and second power transformers, maximum current protection blocks of the low voltage of the first and second power transformers, blocks combined voltage start of the first and second power transformers, differential protection units of the first and second se high voltage buses, first and second line breaker failure reservation blocks, section switch failure reservation blocks, linear circuit breaker control units, section switch circuit breaker control units, while the first input of the differential protection unit of the first power transformer is connected to the output of the first line current transformer , the second input - with the output of the medium voltage current transformer of the first power transformer, and the third - with the output of the current transformer n the first voltage transformer, the first input of the differential protection unit of the second power transformer is connected to the output of the second line current transformer, the second input to the output of the medium voltage transformer of the second power transformer, and the third to the output of the low voltage current transformer of the second power transformer, the first input the unit of maximum current protection of the medium voltage of the first power transformer is connected to the output of the medium voltage current transformer of the first the main transformer, and the second one with the output of the medium voltage voltage transformer of the first power transformer, the first input of the maximum current protection block of the medium voltage of the second power transformer is connected to the output of the medium voltage transformer of the second power transformer, and the second with the output of the medium voltage transformer of the second power transformer , the input of the unit for overcurrent protection of low voltage of the first power transformer is connected to the output of the transform ora of the low-voltage current of the first power transformer, the input of the low-voltage overcurrent protection block of the second power transformer is connected to the output of the low-voltage current transformer of the second power transformer, the input of the combined voltage start-up block of the first power transformer is connected to the output of the medium-voltage voltage transformer of the first power transformer, input the combined voltage start block of the second power transformer is connected to the transformer output ora of medium voltage voltage of the second power transformer, characterized in that in order to unify the technical means and increase the reliability of the operation, a repair jumper from the side of the lines, two current transformers of the repair jumper, voltage transformers of the first and second sections of high voltage buses, high voltage current transformers are introduced into the device first and second power transformers, differential phase protection blocks of the first and second lines, distance protection blocks of the first and second lines, current blocks directional protection of the zero sequence of the first and second lines, interphase current cut-off units of the first and second lines, fault location units, medium voltage circuit breaker failure reservation units, low voltage circuit breaker failure reservation units, blocking in case of malfunctions in the voltage circuits of the first and second busbar sections voltage and sixteen programmable switches, and the input of the differential phase protection block of the first line through the first programmable switch with connected to the output of the current line transformer of the first line and the output of the first current transformer of the repair jumper, the input of the second-phase differential-phase protection unit through the second programmable switch is connected to the output of the second line current transformer and the output of the second repair jumper current transformer, the first input of the first distance protection unit lines through a third programmable switch connected to the output of the current transformer of the first line and to the output of the first current transformer of the repair jumper, and the first input of the distance protection unit of the first line is connected to the output of the voltage transformer of the first section of the busbars of the highest voltage, the first input of the distance protection of the second line through the fourth programmable switch is connected to the output of the current transformer of the second line and the output of the second current transformer of the repair jumper, and the second input of the remote the protection of the second line is connected to the output of the voltage transformer of the second section of the high voltage busbars, the first input of the current directional protection unit is zero the sequence of the first line through the fifth programmable switch is connected to the output of the current transformer of the first line and to the output of the first current transformer of the repair jumper, and the second input of the current directional protection block of the zero sequence of the first line is connected to the output of the voltage transformer of the first section of the busbars of the highest voltage, the first input of the current directional block protection of the zero sequence of the second line through the sixth programmable switch connected to the output of the current transformer of the second l and with the output of the second current transformer of the repair jumper, and the second input of the block of current directional protection of the zero sequence of the second line is connected to the output of the voltage transformer of the second section of the busbars of the highest voltage, the input of the block of interphase current cutoff of the first line through the seventh programmable switch is connected to the output of the current transformer of the first line and with the output of the first current transformer of the repair jumper, the input of the interphase current cut-off block of the second line through the eighth programmable switch the switch is connected to the output of the second line current transformer and to the output of the second repair jumper current transformer, the first input of the differential protection unit of the first section of the high voltage busbars is connected through the ninth programmable switch to the output of the first line current transformer, the second input is connected to the output of the first voltage current transformer power transformer, and the third input is connected to the output of the first current transformer of the sectional switch, the first input of the WTO differential protection unit of the second section of the high voltage bus through the tenth programmable switch is connected to the output of the current transformer of the second line, the second input is connected to the output of the high voltage current transformer of the second power transformer, and the third input is connected to the output of the second current transformer of the section switch, the input of the first failure switch reservation unit line through the eleventh programmable switch is connected to the output of the current transformer of the first line, the input of the second failure switch backup unit line through the twelfth programmable switch is connected to the output of the second line current transformer, the input of the first section breaker failure reservation unit through the thirteenth programmable switch is connected to the output of the sectional circuit breaker current transformer, the input of the second section switch failure reservation unit through the fourteenth programmable switch is connected to the output of the second current transformer section switch, first input of overcurrent protection block high its voltage of the first power transformer is connected to the output of the high voltage current transformer of the first power transformer, and the second to the output of the low voltage voltage transformer of the first power transformer, the first input of the maximum current protection block of the higher voltage of the second power transformer is connected to the output of the high voltage current transformer of the second power transformer and the second - with the output of the low voltage voltage transformer of the second power transformer, input block and the failure backup of the medium voltage circuit breaker of the first power transformer is connected to the output of the medium voltage current transformer of the first power transformer, the input of the medium voltage circuit breaker failure backup unit of the second power transformer is connected to the output of the medium voltage current transformer of the second power transformer, the input of the low voltage circuit breaker failure backup unit of the first power transformer the transformer is connected to the output of the low voltage current transformer first о power transformer, the input of the low-voltage circuit breaker of the low-voltage circuit breaker of the second power transformer is connected to the output of the low-voltage current transformer of the second power transformer, the blocking input for malfunctions in the voltage circuits of the first section of the high-voltage busbars is connected to the output of the voltage transformer of the first section of the high-voltage buses, the lock input in case of malfunctions in the voltage circuits of the second section of the high voltage busbars connected to the output of the voltage transformer of the second of the high voltage busbar, the first input of the first line fault location block through the fifteenth programmable switch is connected to the output of the first line current transformer and the output of the first repair jumper current transformer, and the second input of the first line fault location block is connected to the voltage transformer output of the first bus section higher voltage, the first input of the unit for determining the location of damage of the second line through the sixteenth programmable switch is connected to the output of the transformer a second-current current transformer and with the output of the second repair jumper current transformer, and the second input of the second-line fault location unit is connected to the voltage transformer output of the second high voltage bus section, the first input of the first line circuit breaker control unit is connected to the voltage transformer output of the first high-voltage bus section voltage, and the second - with a coupling capacitor of the first line, the first input of the automation unit for controlling the switch of the second line is connected to the output of the voltage transformer I have a second section of high voltage busbars, and a second one with a second-line coupling capacitor, the first input of the first sectional control circuit breaker control unit is connected to the voltage transformer output of the first high voltage bus section, and the second one with the voltage transformer output of the second high voltage bus section, the first input the second block of automation control sectional switch is connected to the output of the voltage transformer of the second section of the busbars of the highest voltage, and the second to the output of the voltage transformer of the first sec tion of tires of higher voltage.

When operating a 110 or 220 kV switchgear of a substation with a section switch turned on and a repair jumper disconnected, programmable switches 2, 10, 16, 20, 24, 50 and 64 connect blocks 1, 9, 15, 19, 23, 49, and 63 s, respectively a first-line current transformer 3, and programmable switches 6, 13, 18, 22, 28, 52, and 66 connect blocks 5, 12, 17, 21, 27, 51, and 65, respectively, to a second-line current transformer 7.

When operating a 110 or 220 kV switchgear of a substation with a section switch or a first line switch off and a repair jumper turned on, programmable switches 2, 10, 16, 20, 50, and 64 connect blocks 1, 9, 15, 19, 49, and 63, respectively with transformer 4 current repair jumper.

When operating a 110 or 220 kV switchgear of a substation with a section switch or a second line switch off and a repair jumper turned on, programmable switches 6, 13, 18, 22, 52 and 66 connect blocks 5, 12, 17, 21, 51, and 65, respectively with transformer 8 current repair jumper.

Description

The utility model relates to the field of electrical engineering and the electric power industry and can be used for relay protection and control of a substation with a 110 or 220 kV switchgear made according to the “bridge with circuit breakers in the circuit lines and repair jumper on the side of lines” circuit.

The device is intended for installation on panels and in control cabinets located on relay boards and control panels of substations. The device is designed to protect connections and control switches in the bridge circuit as an independent product. The device provides interaction with switches equipped with various types of drive mechanisms.

A device for relay protection and control of a substation with a high voltage switchgear made according to the bridge circuit with circuit breakers and a sectional switch, comprising medium and low voltage current transformers of the first and second power transformers, current transformers of the first and second lines, current transformers of the sectional switch , medium and low voltage transformers of the first and second power transformers, differential protection units of the first and second power transformers, units for overcurrent protection of higher voltage of the first and second power transformers, units for overcurrent protection of medium voltage of the first and second power transformers, units for overcurrent protection of low voltage of the first and second power transformers, combined start-up units for voltage of the first and second power transformers , differential protection blocks of the first and second sections of high-voltage tires, redundant failure reservation blocks of the first and of the second line, sectional switch failure reservation blocks, linear circuit breaker control automation blocks, sectional switch control automatics blocks, the first input of the differential protection block of the first power transformer connected to the output of the current transformer of the first line, the second input to the output of the medium voltage current transformer of the first power transformer, and the third with the output of the low voltage current transformer of the first power transformer, the first input of the differential protection circuit of the second power transformer is connected to the output of the second line current transformer, the second input to the output of the medium voltage transformer of the second power transformer, and the third to the output of the low voltage current transformer of the second power transformer, the first input of the maximum current protection block of the higher voltage of the first power transformer connected to the output of the high voltage current transformer of the first power transformer, and the second to the output of the lower voltage transformer voltage of the first power transformer, the first input of the maximum current protection block of the higher voltage of the second power transformer is connected to the output of the high voltage current transformer of the second power transformer, and the second to the output of the low voltage voltage transformer of the second power transformer, the first input of the maximum current protection block of the medium voltage of the first power the transformer is connected to the output of the medium voltage current transformer of the first power transformer, and the second with the middle voltage transformer of the first power transformer, the first input of the medium current overload protection unit of the second power transformer is connected to the output of the medium voltage transformer of the second power transformer, and the second to the output of the medium voltage transformer of the second power transformer, the input of the lower current protection block voltage of the first power transformer is connected to the output of the low voltage current transformer of the first silt transformer, the input of the low-voltage overcurrent protection block of the second power transformer is connected to the output of the low-voltage current transformer of the second power transformer, the input of the combined voltage start-up block of the first power transformer is connected to the output of the medium-voltage voltage transformer of the first power transformer, the input of the combined voltage start-up block the second power transformer is connected to the output of the transformer medium voltage voltage W power transformer (Protection and automation cabinet of two (three-) winding transformers for the "bridge" circuit type ШЭ 2607 151. Operation manual for ECRA. 656453.163 RE. Revision of 11/7/2008.)

The disadvantage of this device is the limited functionality.

The technical result, to which the proposed technical solution is directed, is the unification of technical means and increasing the reliability of the device when used in a substation with a simplified circuit of a 110-220 kV switchgear in the form of a bridge. The expansion of the functional composition increases the degree of unification, since the same device is used to protect and control the volume of all connections of this switchgear, including power lines, power transformers and their switches.

The technical result is achieved in that in a centralized relay protection and control device of a substation with a high voltage switchgear made according to the bridge circuit with circuit breakers in the first and second line circuits and a sectional switch containing medium and low voltage current transformers of the first and second power transformers, transformers current of the first and second lines, current transformers of the sectional switch, voltage transformers of medium and low voltage of the first and second si power transformers, differential protection units of the first and second power transformers, units for overcurrent protection of the highest voltage of the first and second power transformers, units for overcurrent protection of the medium voltage of the first and second power transformers, units for overcurrent protection of the low voltage of the first and second power transformers, combined units voltage start-up of the first and second power transformers, differential protection units of the first and second bus sections in voltage, redundant circuit breaker redundancy blocks of the first and second lines, sectional circuit breaker failure redundancy blocks, linear circuit breaker control units, sectional circuit breaker circuit breaker control units, while the first input of the differential protection block of the first power transformer is connected to the output of the first line current transformer, the second the input is with the output of the medium voltage current transformer of the first power transformer, and the third with the output of the lower current transformer voltage of the first power transformer, the first input of the differential protection unit of the second power transformer is connected to the output of the second line current transformer, the second input to the output of the medium voltage transformer of the second power transformer, and the third to the output of the low voltage current transformer of the second power transformer, the first input of the block the maximum current protection of the medium voltage of the first power transformer is connected to the output of the medium voltage current transformer of the first power transformer the transformer, and the second one with the output of the medium voltage voltage transformer of the first power transformer, the first input of the maximum current protection block of the medium voltage of the second power transformer is connected to the output of the medium voltage transformer of the second power transformer, and the second with the output of the medium voltage voltage transformer of the second power transformer, the input of the unit for overcurrent protection of the low voltage of the first power transformer is connected to the output of the current transformer higher voltage of the first power transformer, the input of the low-voltage overcurrent protection block of the second power transformer is connected to the output of the low-voltage current transformer of the second power transformer, the input of the combined voltage start-up block of the first power transformer is connected to the output of the medium-voltage voltage transformer of the first power transformer, the input of the combined voltage start of the second power transformer is connected to the output of the voltage transformer the medium voltage of the second power transformer, characterized in that for the unification of technical means and improve reliability, the device introduced a repair jumper from the lines, two current transformers of the repair jumper, voltage transformers of the first and second sections of the busbars of the highest voltage, current transformers of the highest voltage of the first and second power transformers, differential phase protection units of the first and second lines, distance protection units of the first and second lines, current direction blocks full protection of the zero sequence of the first and second lines, blocks between the phase current cutoff of the first and second lines, blocks for determining the location of damage, blocks for fail-safe backups of the medium-voltage circuit breaker, blocks for fail-safe backups of the low-voltage circuit breaker, interlocks for faults in the voltage circuits of the first and second busbars voltage and sixteen programmable switches, and the input of the differential phase protection unit of the first line through the first programmable switch is connected to the output of the current line transformer of the first line and the output of the first current transformer of the repair jumper, the input of the second-phase differential-phase protection unit through the second programmable switch is connected to the output of the second line current transformer and the output of the second current transformer of the repair jumper, the first input of the first line distance protection unit through the third programmable switch is connected to the output of the current transformer of the first line and to the output of the first current transformer of the repair jumper, and the second input b the first line distance protection lock is connected to the output of the voltage transformer of the first section of the high voltage busbars, the first input of the second line distance protection unit through the fourth programmable switch is connected to the output of the second line current transformer and the output of the second repair jumper current transformer, and the second input of the second distance protection unit the line is connected to the output of the voltage transformer of the second section of the high voltage busbars, the first input of the current directional protection block is zero First of all, through the fifth programmable switch, it is connected to the output of the current transformer of the first line and to the output of the first current transformer of the repair jumper, and the second input of the current directional protection block of the zero sequence of the first line is connected to the output of the voltage transformer of the first section of the high voltage busbars, the first input of the current directional block protection of the zero sequence of the second line through the sixth programmable switch is connected to the output of the current transformer of the second line and with by the second current transformer of the repair jumper, and the second input of the zero directional current protection unit of the second line is connected to the output of the voltage transformer of the second section of the busbars of the highest voltage, the input of the interphase current cutoff of the first line through the seventh programmable switch is connected to the output of the first line current transformer and to the output the first current transformer of the repair jumper, the input of the interphase current cutoff unit of the second line through the eighth programmable switch connected to the output of the second line current transformer and to the output of the second repair jumper current transformer, the first input of the differential protection unit of the first section of the high voltage busbars through the ninth programmable switch is connected to the output of the first line current transformer, the second input is connected to the output of the first voltage high voltage current transformer transformer, and the third input is connected to the output of the first current transformer of the sectional switch, the first input of the differential protection unit of the second section the high voltage bus through the tenth programmable switch is connected to the output of the second line current transformer, the second input is connected to the output of the high voltage current transformer of the second power transformer, and the third input is connected to the output of the second current transformer of the sectional switch the input of the first line breaker failure reservation unit through the eleventh the programmable switch is connected to the output of the first line current transformer, the input of the second line circuit breaker failure backup unit is black the twelfth programmable switch is connected to the output of the second line current transformer, the input of the first section breaker failure reservation unit through the thirteenth programmable switch is connected to the output of the sectional circuit breaker current transformer, the input of the second section switch failure reservation unit through the fourteenth programmable switch is connected to the output of the sectional second current transformer circuit breaker, the first input of the overcurrent protection block of higher voltage the first power transformer is connected to the output of the high voltage current transformer of the first power transformer, and the second to the output of the low voltage voltage transformer of the first power transformer, the first input of the maximum current protection block of the higher voltage of the second power transformer is connected to the output of the high voltage current transformer of the second power transformer, and the second - with the output of the low-voltage voltage transformer of the second power transformer, the input of the reserve unit If the medium voltage circuit breaker of the first power transformer fails, it is connected to the output of the medium voltage current transformer of the first power transformer, the input of the medium voltage circuit breaker failure backup unit of the second power transformer is connected to the output of the medium voltage current transformer of the second power transformer, the input of the low voltage circuit breaker of the low voltage circuit breaker of the first power transformer connected to the output of the low voltage current transformer of the first silovog transformer, the input of the low-voltage circuit breaker of the low-voltage circuit breaker of the second power transformer is connected to the output of the low-voltage current transformer of the second power transformer, the blocking input for malfunctions in the voltage circuits of the first section of the high-voltage busbars is connected to the output of the voltage transformer of the first section of the high-voltage buses, the blocking input for malfunctions in the voltage circuits of the second section of the busbars of the highest voltage is connected to the output of the voltage transformer of the second section of tires in higher voltage, the first input of the first line fault location block through the fifteenth programmable switch is connected to the output of the first line current transformer and the output of the first repair jumper current transformer, and the second input of the first line fault location block is connected to the output of the voltage transformer of the first section of the high voltage bus , the first input of the second line fault location unit through the sixteenth programmable switch is connected to the transformer output then and the second line and the output of the second current transformer of the repair jumper, and the second input of the second line fault location unit is connected to the output of the voltage transformer of the second section of high voltage tires, the first input of the control circuit breaker control unit of the first line is connected to the output of the voltage transformer of the first section of high voltage buses and the second - with the coupling capacitor of the first line, the first input of the automation unit for controlling the circuit breaker of the second line is connected to the output of the voltage transformer of the second section of the high voltage busbars, and the second with a second-line coupling capacitor, the first input of the first sectional control circuit breaker control unit is connected to the output of the voltage transformer of the first section of high voltage buses, and the second to the voltage transformer output of the second section of high voltage buses, the first input of the second block automatic control sectional switch connected to the output of the voltage transformer of the second section of the busbars of the highest voltage, and the second to the output of the voltage transformer of the first section of the bus you total voltage.

The essence of the proposed utility model is illustrated by the drawing, which shows a centralized device for relay protection and control of the substation with a high voltage switchgear made according to the bridge circuit with circuit breakers in the circuit lines and a repair jumper on the side of the lines.

In device

the input of the unit 1 differential-phase protection of the first line through the first programmable switch 2 is connected to the output of the current transformer 3 of the first line and to the output of the first current transformer 4 of the repair jumper,

the input of the second phase differential phase protection unit 5 through the second programmable switch 6 is connected to the output of the second line current transformer 7 and to the output of the second repair jumper current transformer 8,

the first input of the first line distance protection unit 9 through the third programmable switch 10 is connected to the output of the first line current transformer 3 and the output of the first repair jumper current transformer 4, and the second input of the first line distance protection unit 9 is connected to the output of the voltage transformer 11 of the first busbar section voltage

the first input of the second line distance protection unit 12 through the fourth programmable switch 13 is connected to the output of the second line current transformer 7 and the output of the second repair jumper current transformer 8, and the second input of the second line distance protection unit 12 is connected to the output of the voltage transformer 14 of the second busbar section voltage

the first input of the first line zero directional current protection unit 15 through the fifth programmable switch 16 is connected to the output of the current transformer 3 of the first line and the output of the first repair jumper current transformer 4, and the second input of the first sequence zero current directional protection unit 15 is connected to the output of the transformer 11 voltage of the first section of high voltage tires,

the first input of the second line zero directional current protection unit 17 through the sixth programmable switch 18 is connected to the output of the second line current transformer 7 and the output of the second repair jumper current transformer 8, and the second input of the second sequence zero directional current protection block 17 is connected to the transformer output 14 voltages of the second section of high voltage tires,

the input of the block 19 of the interphase current cutoff of the first line through the seventh programmable switch 20 is connected to the output of the current transformer 3 of the first line and to the output of the first current transformer 4 of the repair jumper,

the input of the block 21 of the interphase current cutoff of the second line through the eighth programmable switch 22 is connected to the output of the current transformer 7 of the second line and to the output of the second current transformer 8 of the repair jumper,

the first input of differential protection unit 23 of the first section of the high voltage busbars through the ninth programmable switch 24 is connected to the output of the first line current transformer 3, the second input is connected to the output of the high voltage current transformer 25 of the first power transformer, and the third input is connected to the output of the first transformer 26 current section switch QB,

the first input of the differential protection unit 27 of the second section of the high voltage busbars through the tenth programmable switch 28 is connected to the output of the second line current transformer 7, the second input is connected to the output of the high voltage current transformer 29 of the second power transformer, and the third input is connected to the output of the second transformer 30 current section switch QB,

the first input of the differential protection unit 31 of the first power transformer (T1) is connected to the output of the first line current transformer 3, the second input to the output of the medium voltage transformer 32 of the first power transformer (T1), and the third to the output of the lower current transformer 33 voltage (LV) of the first power transformer (T1),

the first input of the differential protection unit 34 of the second power transformer (T2) is connected to the output of the second line current transformer 7, the second input to the output of the medium voltage transformer 35 of the second power transformer (T2), and the third to the output of the lower current transformer 36 voltage (LV) of the second power transformer (T2),

the first input of the unit for overcurrent protection of the highest voltage of the first power transformer (T1) is connected to the output of the transformer 25 of the high voltage current of the first power transformer (T1), and the second to the output of the low voltage voltage transformer 38 of the first power transformer (T1),

the first input of the unit for overcurrent protection of the higher voltage of the second power transformer (T2) is connected to the output of the transformer 29 of the current of the second voltage of the second power transformer (T2), and the second to the output of the transformer 40 of the low voltage (LV) of the second power transformer (T2),

the first input of the medium current overload protection unit 41 (MV) of the first power transformer (T1) is connected to the output of the medium voltage transformer (MV) transformer 32 of the first power transformer (T1), and the second to the output of the medium voltage (MV) transformer 42 power transformer (T1),

the first input of the medium-voltage overload protection unit 43 of the second power transformer (T2) is connected to the output of the medium-voltage transformer 35 of the second power transformer (T2), and the second to the output of the second voltage transformer 44 of the middle voltage (CH) power transformer (T2),

the input of the unit 45 of the maximum current protection of the low voltage (LV) of the first power transformer (T1) is connected to the output of the transformer 33 of the current low voltage (LV) of the first power transformer (T1),

the input of the unit 46 of the maximum current protection of the lower voltage (LV) of the second power transformer (T2) is connected to the output of the transformer 36 of the current of low voltage (LV) of the second power transformer (T2),

the input of the combined voltage start-up unit 47 of the first power transformer (T1) is connected to the output of the medium voltage (SN) voltage transformer 42 of the first power transformer (T1),

the input of the combined voltage start block 48 of the voltage of the second power transformer (T2) is connected to the output of the transformer 44 of the medium voltage (CH) voltage of the second power transformer (T2),

the input of the fault reservation block 49 of the first line switch Q1 through the eleventh programmable switch 50 is connected to the output of the first line current transformer 3,

the input of the fault backup unit 51 of the second line switch Q2 through the twelfth programmable switch 52 is connected to the output of the second line current transformer 7,

the input of the first block 53 of the fault redundancy section switch QB through the thirteenth programmable switch 54 is connected to the output of the first current transformer 26 current section switch QB,

the input of the second block 55 of the failover reservation of the QB section switch through the fourteenth programmable switch 56 is connected to the output of the second current transformer 30 of the QB section switch,

the input of the failure reservation unit 57 of the medium voltage (MV) circuit breaker Q3 of the first power transformer (T1) is connected to the output of the medium voltage current transformer 32 of the first power transformer (T1),

the input of the block 58 reservation failure failure Q5 medium voltage of the second power transformer (T2) is connected to the output of the transformer 35 of the current medium voltage (CH) of the second power transformer (T2),

the input of the failure reservation unit 59 of the low voltage (LV) switch Q4 of the first power transformer (T1) is connected to the output of the low voltage (LV) current transformer 33 of the first power transformer (T1),

the input of the failure reservation unit 60 of the low voltage (LV) switch Q6 of the second power transformer (T2) is connected to the output of the low voltage (LV) current transformer 36 of the second power transformer (T2),

the blocking input 61 when there is a malfunction in the voltage circuits of the first section of the high voltage busbars is connected to the output of the voltage transformer 11 of the first section of the high voltage tires,

blocking input 62 for faults in the voltage circuits of the second section of the high voltage busbars is connected to the output of the voltage transformer 14 of the second section of the high voltage tires,

the first input of the first line fault location unit 63 through the fifteenth programmable switch 64 is connected to the output of the first line current transformer 3 and the output of the first repair jumper current transformer 4, and the second input of the first line fault location determiner 63 is connected to the output of the voltage transformer 11 of the first bus section high voltage

the first input of the second line fault location unit 65 through the sixteenth programmable switch 66 is connected to the output of the second line current transformer 7 and the output of the second repair jumper current transformer 8, and the second input of the second line fault location determiner 65 is connected to the output of the voltage transformer 14 of the second bus section high voltage

the first input of the first line circuit breaker control unit 67 is connected to the output of the voltage transformer 11 of the first section of the high voltage buses, and the second to the communication capacitor 68 of the first line,

the first input of the second line circuit breaker control automatics 69 is connected to the output of the voltage transformer 14 of the second section of the high voltage buses, and the second to the second line coupling capacitor 70,

the first input of the first block 71 of the automatic control unit of the sectional switch QB is connected to the output of the voltage transformer 11 of the first section of the high voltage tires, and the second to the output of the voltage transformer 14 of the second section of the high voltage buses,

the first input of the second block 72 of the automatic control unit of the sectional switch QB is connected to the output of the voltage transformer 14 of the second section of the high voltage tires, and the second to the output of the voltage transformer 11 of the first section of the high voltage buses.

The device operates as follows.

Blocks 1 and 5 of the differential-phase protection (DFD) of the first and second lines, respectively, contain the functions of starting the transceiver, preparing the trip circuits of the Q1 switch of the first and Q2 of the second line, starting the protection, allowing phase comparison and disconnecting the line if there is a sufficient pause in the high-frequency channel. The structure of the functions of the units includes control of the interphase circuits of the line resistance.

Blocks 9 and 12 of the distance protection (DZ), respectively, of the first and second line of distance protection contain the function of a three-stage distance protection with control of direction and current, as well as with locking when swinging. Blocks 9 and 12 selectively operate with all short circuits (SC) on the protected line and on redundant elements, do not work with all external faults, swings, asynchronous mode, non-synchronous switching and during operational switching, and also function correctly in the line test mode. Protection works when the network resistance decreases, i.e. by the principle of action is minimal.

The blocks 15 and 17 of the current directional protection of the zero sequence (TNZNP), respectively, of the first and second lines, connected to the current and voltage of the zero sequence, are used to protect against earth faults and contain the functions of a four-stage current directional protection of the zero sequence with direction and current control, and also with blocking when the magnetizing current of the power transformer is thrown. Blocks 15 or 17 of the protection operate when the current exceeds the zero sequence of the set value and fixes the direction of emergency power from the protected object to the substation buses. The selectivity of TNZNP is ensured by the use of step time delays. The main measuring organ of the TNZNP stage is the zero sequence current relay. Any step can be performed with direct, reverse, and irregularly directed or non-directional characteristics in time. To ensure directivity in the TNZNP, two zero sequence power direction functions are used - resolving, which reacts when the zero sequence power is directed from the protected object to the buses, and blocking, which acts in the reverse direction of the zero sequence power. To quickly eliminate the damage that occurred on that part of the line that is not covered by the zone of operation of the first stage of the TNZNP, additional logic is provided using communication channels.

The blocks 19 and 21 of the interphase current cutoff (MFTO), respectively, of the first and second lines react to interphase faults near the substation.

The differential protection blocks 23 and 27, respectively, of the first and second sections of the high voltage buses act on the circuit breaker Q1 of the first and - Q2 of the second line and the section switch QB, as well as the switches Q3 - Q6 of the medium and low voltage transformers with a short circuit in the protection zone.

The differential protection blocks 31 and 34 of the first (T1) and second (T2) power transformers (DZT), respectively, are made with braking from the maximum of the arm currents of the transformers, as well as with a differential current cut-off function without braking. For detuning from inrush magnetization currents, a second harmonic blocking is provided. For detuning from transformer over-excitation modes, a fifth harmonic blocking is provided. Blocks 31 and 34 of the DZT selectively operate in case of internal damage in the protected transformer and for all types of short circuit on its terminals and do not work in case of external short circuits, inrush currents of magnetization, in-phase modes, swings, asynchronous mode, non-synchronous switching-ons and operational switching. The possibility of digital equalization of the currents of the arms of the transformer is also provided.

Blocks 37 and 39 of the overcurrent protection of higher voltage, respectively, of the first (T1) and second (T2) power transformer (MTZ VN) are designed to protect the transformer from the long flow of currents during external short-circuit, as well as to reserve protection for internal short-circuit. MTZ VN transformer contains the function of starting voltage VN.

Blocks 41 and 43 of the maximum current protection, respectively, of the average voltage (MV) of the first (T1) and second (T2) power transformer (MTZ SN), made with voltage start-up, are designed to protect the transformer from prolonged current flow during external short-circuit, as well as reservation of protection for internal short circuit. Blocks 41 and 43 MTZ SN contain three stages. The first stage is made with automatic acceleration, the second and third - with an average voltage start. The first stage acts on the circuit breaker Q3 or Q5 medium voltage (MV) with the prohibition of automatic restart (AR), the second and third stages act on the circuit breaker Q3 or Q5 followed by automatic reclosure.

Blocks 45 and 46 of the maximum current protection of the low voltage (LV) of the first (T1) and second (T2) power transformer (MTZ LV), respectively, made with voltage start-up, are designed to protect the transformer from the long flow of currents with external short-circuit, as well as reservation of protection for internal short circuit. Blocks 45 and 46 MTZ NN transformer contain three stages. The first stage is made with automatic acceleration, the second and third - with low voltage start. The first stage acts on tripping the low voltage switch Q4 or Q6 with the automatic reclosure inhibit, the second and third stages act on tripping the Q4 or Q6 circuit breaker with subsequent reclosure.

Blocks 47 and 48 of the combined voltage start of the first (T1) and second (T2) power transformer (KPN), respectively, are designed to start the voltage of the MTZ SN in order to increase its sensitivity. The voltage start function includes monitoring the minimum line voltage and maximum negative sequence voltage.

Blocks 49 and 51 of reservation of failure of the circuit breaker Q1 and Q2 of the first and second line, respectively, of the first and second lines (ROV LV) are designed to disconnect adjacent circuit breakers in case of failure of circuit breakers during short circuit. The output signal of the ROV LV actuation acts on opening the QB section switch with AR inhibit, on opening the medium voltage circuit breaker with the effect on automatic switching of the reserve (ATS) and on switching off the low voltage circuit breaker with ATS.

Blocks 53 and 55 of the QB section breaker failure reservation (ROW CB) QB are designed to disconnect adjacent circuit breakers in the event of a failure of the QB section switch and the protection. The output signal of the operation of the DOM CB acts on the disconnection of the circuit breaker Q1 and Q2 of the first and second lines with the automatic reclosure inhibit, on the disconnection of the medium voltage switch Q3 and Q5 with ATS and on the disconnection of the low voltage switch Q4 and Q6 with ATS.

Blocks 57 and 58 of the failover circuit breaker Q3 and Q5 of the medium voltage (ROV CH) of the first (T1) and second (T2) power transformer, respectively, are designed to trip adjacent circuit breakers in the event of a circuit breaker failure and protection. The output signal of the operation of the DOM SN acts on the disconnection of the Q1 and Q2 circuit breakers of the first and second lines with the automatic reclosure inhibit, on the disconnection of the QB section switch with the automatic reclosure prohibition, and on the disconnection of the low voltage switch Q4 and Q6 with ATS.

Blocks 59 and 60 of redundancy of the circuit breaker failure Q4 and Q6, respectively, of the lower voltage (ROW LV) are designed to trip adjacent circuit breakers in the event of a circuit breaker failure and the protection is applied. The output signal of the operation of the ROV LV operates on the opening of the Q1 and Q2 circuit breakers of the first and second lines with the automatic reclosure inhibit, on the disconnection of the QB section switch with automatic reclosure prohibition, on the disconnection of the low voltage circuit breakers Q4 or Q6 with the automatic reclosure and ATS prohibition, and on the disconnection of the average Q3 or Q5 circuit breaker voltage with ATS.

Locks 61 and 62 in case of malfunctions in the voltage circuits of the first and second sections of high voltage tires (BNN), which respond to all types of open and short circuits in transformer circuits 11 and 14 voltage (VT), respectively, when receiving a signal about their malfunction from the block contacts of the VT circuit breakers or against the protection of VT.

Blocks 63 and 65 for determining the location of damage (OMP), respectively, of the first and second lines have the functions of measuring the parameters of the pre-emergency and emergency modes, based on which the type and location of the damage is determined.

During the short circuit, the “Start WMD” signal is in the tripped state. If the OMP function detects a short-circuit trip, the signal is reset. If there is no short circuit trip, the signal is automatically reset 10 seconds after the operation of the WMD block.

Blocks 67 and 69 of the control circuit breaker automation Q1 and Q2 of the first and second lines (AUV LV), respectively, implements the function of a three-phase automatic restart (TAPV). TAPV operation is allowed after the circuit breaker is in the on position during the time the circuit breaker is ready for the next turn on. A TAPV blocking function is provided when connecting power transformers (T1) or (T2) to substation buses with a bridge circuit through disconnectors. In this case, during the operation of the transformer protection, the linear and section switches are switched off. TAPV of these switches must be blocked until the disconnector is disconnected. When the input blocking signals are removed, the reclosure starts.

Blocks 71 and 72 automatic control sectional switch (AUV SN) QB implements the function (TAPV). TAPV operation is allowed after the circuit breaker is in the on position during the time the circuit breaker is ready for the next turn on.

When operating a 110 or 220 kV switchgear of a substation with the QB section switch turned on and the repair jumper disconnected, programmable switches 2, 10, 16, 20, 24, 50 and 64 connect blocks 1, 9, 15, 19, 23, 49, and 63, respectively with a current transformer 3 of the first line, and programmable switches 6, 13, 18, 22, 28, 52, and 66 connect blocks 5, 12, 17, 21, 27, 51, and 65, respectively, with a second line current transformer 7.

When the switchgear 110 or 220 kV of the substation is operating with the QB section switch off or the first line switch Q1 off and the repair jumper turned on, the programmable switches 2, 10, 16, 20, 50 and 64 connect blocks 1, 9, 15, 19, 49, respectively and 63 with transformer 4 current repair jumper.

When the switchgear 110 or 220 kV of the substation is operated with the sectional switch QB turned off or the second line switch Q2 turned off and the repair jumper turned on, programmable switches 6, 13, 18, 22, 52 and 66 connect blocks 5, 12, 17, 21, 51, respectively and 65 with transformer 8 current repair jumper.

In any operating mode of a 110 or 220 kV switchgear substation with a QB section switch and a repair jumper, a high voltage current transformer 25 of the first (T1) power transformer, a QB section current switch 26, a high voltage current transformer of the second power transformer (T2) 29, a transformer 30 current section switch QB, transformer 32 of the medium voltage current of the first (T1) power transformer, low voltage current transformer 33 of the first (T1) power transformer, trans medium voltage current formatter 35 of the second (T2) power transformer, low voltage current transformer 36 of the second (T2) power transformer, low voltage voltage transformer 38 of the first (T1) power transformer, low voltage voltage transformer 40 of the second (T2) power transformer, transformer 42 medium voltage voltage of the first (T1) power transformer, transformer 44 medium voltage voltage of the second (T2) power transformer, programmable switch 54, programmable eklyuchatel 56, the capacitor 68 of the first communication line and a capacitor 70 of the second connection line do not alter the state of its connections with the other elements of the device.

Claims (1)

A centralized relay protection and control device for a substation with a high voltage switchgear designed as a bridge with circuit breakers in the circuits of the first and second lines and a sectional switch containing medium and low voltage current transformers of the first and second power transformers, current transformers of the first and second lines, transformers current switch section, medium and low voltage transformers of the first and second power transformers, differential units the first protection of the first and second power transformers, the blocks of the maximum current protection of the higher voltage of the first and second power transformers, the blocks of the maximum current protection of the medium voltage of the first and second power transformers, the blocks of the maximum current protection of the lower voltage of the first and second power transformers, the blocks of the combined start-up voltage of the first and second power transformers, differential protection blocks of the first and second sections of the busbars of higher voltage, redundancy failure units and the circuit breaker of the first and second lines, sectional switch failure backup units, linear circuit breaker control units, sectional switch circuit breaker control units, the first input of the differential protection unit of the first power transformer connected to the output of the first line current transformer, the second input to the transformer output the medium voltage current of the first power transformer, and the third with the output of the low voltage current transformer of the first power transformer, ne the second input of the differential protection unit of the second power transformer is connected to the output of the second line current transformer, the second input to the output of the medium voltage transformer of the second power transformer, and the third to the output of the low voltage current transformer of the second power transformer, the first input of the medium current maximum protection block the first power transformer is connected to the output of the medium voltage current transformer of the first power transformer, and the second to the output of the transform ora of the voltage of the medium voltage of the first power transformer, the first input of the maximum current protection block of the average voltage of the second power transformer is connected to the output of the medium voltage transformer of the second power transformer, and the second to the output of the medium voltage transformer of the second power transformer, the input of the block of maximum current protection of low voltage the first power transformer is connected to the output of the low voltage current transformer of the first power transformer the input of the low-voltage overcurrent protection block of the second power transformer is connected to the output of the low-voltage current transformer of the second power transformer, the input of the combined voltage start-up block of the first power transformer is connected to the output of the medium-voltage voltage transformer of the first power transformer, the input of the combined-start block for the second voltage a power transformer is connected to the output of the medium voltage transformer of the second power t an informator, characterized in that in order to unify the technical means and increase the reliability of the operation, a repair jumper from the side of the lines, two current transformers of the repair jumper, voltage transformers of the first and second sections of high voltage buses, high voltage current transformers of the first and second power transformers, blocks are introduced into the device differential phase protection of the first and second lines, blocks of distance protection of the first and second lines, blocks of current directional protection of the zero sequence of the first the first and second lines, the blocks of the interphase current cutoff of the first and second lines, the blocks for determining the location of damage, the blocks for failing a medium voltage circuit breaker, the blocks for failing a low voltage circuit breaker, blocking for faults in the voltage circuits of the first and second sections of high voltage buses and sixteen programmable switches moreover, the input of the differential-phase protection block of the first line through the first programmable switch is connected to the output of the current transformer of the first line and with the output of the first current transformer of the repair jumper, the input of the second-phase differential-phase protection block through the second programmable switch is connected to the output of the second line current transformer and the output of the second current transformer of the repair jumper, the first input of the first line distance protection block through the third programmable switch is connected to the transformer output the current of the first line and with the output of the first current transformer of the repair jumper, and the second input of the distance protection unit of the first line is connected with the output of the voltage transformer of the first section of the high voltage busbars, the first input of the second line distance protection unit through the fourth programmable switch is connected to the output of the second line current transformer and the output of the second repair jumper current transformer, and the second input of the second line distance protection unit is connected to the transformer output voltage of the second section of the high voltage busbars, the first input of the block of current directional protection of the zero sequence of the first line through the fifth programmer the first switch is connected to the output of the current transformer of the first line and to the output of the first current transformer of the repair jumper, and the second input of the current directional protection block of the zero sequence of the first line is connected to the output of the voltage transformer of the first section of the high voltage busbars, the first input of the current directional protection block of the second sequence of the second line through the sixth programmable switch connected to the output of the current transformer of the second line and to the output of the second current transformer repair jumpers, and the second input of the zero directional current protection block of the second line is connected to the output of the voltage transformer of the second section of the high voltage bus, the input of the interphase current cut-off of the first line through the seventh programmable switch is connected to the output of the first line current transformer and to the output of the first repair current transformer , the input of the block of interphase current cutoff of the second line through the eighth programmable switch is connected to the output of the current transformer of the second lines and with the output of the second current transformer of the repair jumper, the first input of the differential protection unit of the first section of the high voltage tires through the ninth programmable switch is connected to the output of the current transformer of the first line, the second input is connected to the output of the high voltage current transformer of the first power transformer, and the third input is connected to the output of the first current transformer of the sectional switch, the first input of the differential protection unit of the second section of the busbars of the highest voltage through the tenth program The switch under control is connected to the output of the second-line current transformer, the second input is connected to the output of the high-voltage current transformer of the second power transformer, and the third input is connected to the output of the second current transformer of the sectional switch, the input of the first-line circuit breaker backup unit through the eleventh programmable switch is connected to the transformer output the current of the first line, the input of the second-line circuit breaker failure backup unit via the twelfth programmable switch soy inen with the output of the second line current transformer, the input of the first section switch failure reservation unit through the thirteenth programmable switch connected to the output of the first section switch current transformer, the input of the second section switch failure reservation unit through the fourteenth programmable switch connected to the output of the second section switch current transformer, the first input unit of overcurrent protection of higher voltage of the first power transformer is connected to the output of the high voltage current transformer of the first power transformer, and the second with the output of the low voltage voltage transformer of the first power transformer, the first input of the maximum current protection block of the higher voltage of the second power transformer is connected to the output of the high voltage current transformer of the second power transformer, and the second to the output of the transformer the voltage of the low voltage of the second power transformer, the input of the backup block failure failure of the medium voltage switch ne the first power transformer is connected to the output of the medium voltage current transformer of the first power transformer, the input of the medium voltage circuit breaker failure backup unit of the second power transformer is connected to the output of the medium voltage current transformer of the second power transformer, the input of the low voltage circuit breaker failure backup unit of the first power transformer is connected to the output of the current transformer low voltage of the first power transformer, redundancy block input failure the low voltage switch of the second power transformer is connected to the output of the low voltage current transformer of the second power transformer, the blocking input for malfunctions in the voltage circuits of the first section of the high voltage tires is connected to the output of the voltage transformer of the first section of the high voltage buses, the blocking input for malfunctions in the voltage circuits of the second bus section high voltage is connected to the output of the voltage transformer of the second section of the high voltage tires, the first input of the determination unit The damage of the first line through the fifteenth programmable switch is connected to the output of the current transformer of the first line and to the output of the first current transformer of the repair jumper, and the second input of the fault location unit of the first line is connected to the output of the voltage transformer of the first section of the busbars of the highest voltage, the first input of the damage location determination unit the second line through a sixteenth programmable switch connected to the output of the current transformer of the second line and to the output of the second transformer the repair jumper current, and the second input of the second line fault location block is connected to the output of the voltage transformer of the second high-voltage busbar section, the first input of the first line circuit breaker control unit is connected to the voltage transformer output of the first high-voltage busbar section, and the second to the coupling capacitor of the first lines, the first input of the second line circuit breaker control unit is connected to the output of the voltage transformer of the second section of the high voltage busbars, and the second to the condensation by a second-line communication torus, the first input of the first unit of automation for controlling the sectional switch is connected to the output of the voltage transformer of the first section of busbars of the highest voltage, and the second to the output of the voltage transformer of the second section of busbars of higher voltage, the first input of the second unit of automation of control of the sectional switch is connected to the output of the voltage transformer the second section of high voltage tires, and the second with the output of the voltage transformer of the first section of high voltage tires.

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