RU67302U1 - AUTOMATION OF REDUCED VOLTAGE REDUCTION ON SUBSTANCE BUS - Google Patents

Abstract

The utility model relates to the field of power electronics and can be used to automate the control of the power (quantity) of consumers connected to buses of 6-10 (35) kV substations with a voltage of 110-220 kV by preventing a dangerous decrease in voltage on the buses of electrical substations. The technical result of the utility model is to increase the reliability of providing the possibility of rapid configuration changes. The automation for limiting the reduction of voltage on substation buses contains two blocks for automatically switching off consumers, two blocks for automatically switching on feeders, a communication switch and performs the functions of automating the power (number) of consumers connected to buses of 6-10 (35) kV substations with voltage 110-220 kV, preventing a dangerous decrease in voltage on the buses of electrical substations with a voltage of 110-220 kV in emergency and post-emergency conditions, which is unacceptable under conditions of load stability, by a automatic shutdown of consumers. 2 C.p., Fig. 1, Lit. 4.

Description

The utility model relates to the field of power electronics and can be used to automate the control of the power (quantity) of consumers connected to buses of 6-10 (35) kV substations with a voltage of 110-220 kV by preventing a dangerous voltage drop on the buses of electrical substations.

A device for stabilizing the voltage of a transformer substation with a circuit for connecting the primary and secondary phase windings of the main transformer U / Un and their terminals, respectively, for connecting the network and the load, containing a three-phase boost assembly, which is one three-phase transformer or three single-phase transformers with secondary phase windings connected between the corresponding phase outputs of two three-phase voltage inverters with a 180-degree control algorithm inputs, which are connected in parallel and through the filter and a three-phase reversing rectifier are connected to the load, while for two three-phase voltage inverters a common control system is applied, which is made three-channel with the ability to control the phase of the output voltage of the first three-phase voltage inverter by an angle and the second three-phase voltage inverter by angle = - when changing inside the half-cycle of the mains voltage, and its synchronizing inputs through the synchronization unit are connected to the load, different Ie, that the device contains a block of primary phase voltage deviation sensors of the main transformer, an average three-phase voltage deviation module sensor and a limiter for the lower specified voltage level, while the three-phase voltage inverter control system is configured to limit the minimum and maximum values of control angles by 10-15 ° and the control inputs of its phase channels are connected to the corresponding phase outputs of the sensor block deviations of the primary phase voltage of the main transformer, unitary enterprise The branching input of the control system of the three-phase reversible rectifier is connected through the limiter of the lower predetermined voltage level to the output of the sensor of the module of the average deviation of the three-phase voltage of the network and, in addition, the primary phase windings of the three-phase booster unit and the main transformer of the substation are phase-connected in series [1].

The disadvantage of this device is that it only provides stabilization of the three-phase sinusoidal voltage on the high side of the main transformer.

Closest to the claimed utility model is the automatic disconnection of the load when the voltage is reduced [2], consisting of a unit for automatically switching off consumers and a unit for automatically enabling feeders, the output of which is connected to the output of the automation, and the input is connected to the output of the unit for switching off consumers, the input of which connected to the automation input, moreover, the consumer disconnection automation unit contains a voltage sensor, a starting element, an detecting element, a dosing circuit and a control circuit and a signal of the output, the output of which is connected to the outputs of the unit for switching off consumers, and the inputs are with the outputs of the dosing circuit, the inputs of which are connected to the outputs of the detecting organ, the input of which is connected to the output of the starting organ, the input of which is connected to the output of the voltage sensor, the input of which is connected to the voltage input the network of the block, the block enabling automatic re-enable feeders contains a fixation circuit for triggering the automatic disconnection of consumers, a prohibition circuit for automatic re-enable (AR), a multi-circuit prohibition scheme of automatic reclosure, voltage comparison circuit, adder, delay circuit for reclosure time (T1) and reclosure circuit for alternating resolution of reclosure, the output of which is connected to the output of the unit, the input of which is connected to the input of the latch circuit of the automatic shutdown of consumers, the first output of which is connected to the input AR inhibit circuit, the output of which is connected to the first input of the AR delay triggering circuit (T1), the second input of which is connected to the output of the autoreclosing circuit, the first input of which is connected to the output of the multi-circuit inhibit circuit A reclosure, the input of which is connected to the second output of the latching circuit of the automatic disconnection of consumers, the third output of which is connected to the third input of the reclosure delay circuit (T1), the output of which is connected to the first input of the adder, the second input of which is connected to the output of the voltage comparison circuit, and the output is with the second input of the circuit for alternating resolution of the automatic reclosure.

The disadvantage of this automation is the low reliability and the impossibility of prompt configuration changes.

The technical result of the utility model is to increase reliability and provide the ability to quickly reconfigure.

The technical result is achieved by the fact that in automation [2], which contains a block for automatically switching off consumers and a block for allowing automatic re-switching of feeders, the input of which is connected to the output of the automation, the input of the block for switching off consumers is connected to the input of automation, additionally

the second block of consumer disconnection automatics, a communication switch and the second block of enabling automatic re-enable of feeders were introduced, the outputs from the first to eighth of each block of consumer disconnection automatics are connected to the corresponding inputs of the communication switch, and the first and second inputs are connected to the corresponding outputs of the communication switch, the tenth and eleventh the outputs and the eighth and ninth inputs of the first block of consumer shutdown automation are connected respectively to the ninth and tenth outputs and the thirtieth and thirds there are the first inputs of automation, the third and fourth inputs of which are connected respectively to the sixth and fourth inputs of the first block of consumer disconnection automation, the seventh input of which is connected to the second input of automatics and the fifth input of the second block of consumer disconnection automation, the seventh input of which is connected to the eighth input of automation and the fifth input the first block of consumer disconnection automation, the ninth output and the third input of which are connected respectively to the third input and the ninth output of the second automation block consumer disconnection, the fourth, sixth and tenth inputs of which are connected respectively to the ninth, tenth and eleventh inputs of the automation, the eleventh and twelfth outputs of which are connected respectively to the tenth and eleventh outputs of the second unit of the automatic consumer disconnection, the eighth and ninth inputs of which are connected respectively to the thirty-second and the thirty-third inputs of automation, from the first to the ninth inputs of each block automatically enable re-enable feeders are connected to the corresponding they are outputs of the communication switch, and the first and second outputs are connected to the corresponding inputs of the communication switch, from the eleventh to eighteenth inputs of the first block enabling automatic re-enable feeders are connected respectively from the thirteenth to the twentieth inputs of automation, from the first to fourth outputs of which are connected respectively from third to sixth the outputs of the first block enable automatic re-enable feeders, from the eleventh to eighteenth inputs of the second block permission automatically re-enable feeders are connected respectively from the twenty-first to twenty-eighth inputs of the automation, the twenty-ninth input of which is connected to the tenth input of the second block automatically enable the feeders, the fifth, sixth and seventh inputs and the thirteenth output of the automation are connected to the corresponding inputs of the communication switch, and automation devices for switching off consumers contains a node for determining the direction of power, a node for monitoring the fault of a voltage transformer, an executive body the unit for monitoring the health of the unit and its circuits, the signaling unit and the oscilloscope, the first to fourth inputs of which are connected to the outputs of the same executive body and, respectively, from the tenth to

the thirteenth outputs of the unit, the tenth input of which is connected to the first input of the measuring body and the sixth inputs of the power direction determination unit and the voltage transformer circuit failure control unit, the first to fifth inputs of which are connected from the first to fifth inputs of the power direction determination unit and of the same name the block inputs, the sixth and seventh outputs of the power direction determining unit are connected to the outputs of the unit of the same name, the seventh and eighth inputs of which are connected with the same inputs of the power direction determination unit, the eighth output of which is connected to the third output of the unit, the ninth input and tenth output of which are connected to the same input and output of the power direction determination unit, the tenth input of which is connected to the fifth output of the actuator, the second and third inputs of which are connected respectively, with the ninth and eleventh outputs of the power direction determining unit, the sixth input of the unit is connected to the input of the health monitoring unit of the terminal and its circuits, the output of which connected to the first input of the signaling unit, the third output of which is connected by the twelfth output of the block, the fourth and fifth outputs of which are connected respectively to the first and second outputs of the signaling unit, the eleventh, twelfth and thirteenth inputs of the block are connected respectively to the fourth, fifth and sixth inputs of the actuator, with fourteenth to eighteenth inputs of the block are connected respectively with the eleventh to fifteenth inputs of the node determining the direction of power, moreover, the automatic resolution enable unit The power supply for the feeders contains three connection control nodes, four OR elements, a group of OR elements, two start-up shutdown bodies, two start-up start-up bodies, an oscilloscope, an alarm unit and a terminal failure control unit, to which all signals of the unit are received, and its output is connected to the input signaling unit, the output of which is connected to the tenth output of the unit, the fifteenth and sixteenth inputs of which are connected respectively to the first and second inputs of the first OR element, the output of which is connected to the first input the second OR element, the second input of which is connected to the output of the third OR element, the first input of which is connected to the output of the first trigger switch-on element, the input of which is combined with the input of the first trigger switch-off element and connected to the first input of the block, the second input of which is connected to the combined inputs of the second trigger the enabler and the second trigger shutdown, the output of the second trigger shutdown is connected to the second input of the third OR element, the output of the first trigger shutdown is connected to the second the input of the fourth OR element, the first input of which is connected to the output of the second starting switch-on element, and the output - with the combined seventh inputs of all three connection control nodes, eighth

the inputs of which are combined and connected to the output of the second OR element, the inputs of the group of OR elements are connected from the third to fourteenth input of the block, and the outputs are connected respectively from the first to sixth inputs combined for all three connection control nodes, from the ninth to tenth inputs of the first connection control node respectively, with the seventeenth, eighteenth and nineteenth inputs of the block, the twentieth, twenty first and twenty second inputs of which are connected respectively with the ninth, tenth and eleventh the inputs of the second connection control node, the twenty third, twenty fourth and twenty fifth inputs of the block are connected respectively to the ninth, tenth and eleventh inputs of the third connection control node, the third outputs of each connection control node are connected to the twelfth input of this block, the first and second outputs of each node connection control are connected to the inputs of the oscilloscope and, accordingly, from the first to sixth outputs of the unit, from the seventh to ninth outputs of which are connected to the fourth output respectively, each connection control node.

The introduction of these additional elements and the sequence of their connection can improve reliability and provide the possibility of rapid configuration changes. In other known technical solutions, there are no such signs in their totality, which leads to a positive effect, since excluding any of the elements, or disrupting the order of their connection, it is impossible to achieve the specified technical result.

Figure 1 - presents a block diagram of automation.

Figure 2 - presents a block diagram of the automation circuit breaker consumers.

Figure 3 - presents a block diagram of the resolution of the automatic re-enable feeders.

Figure 4 - presents a diagram of an automation unit with elements of a substation and is intended to explain its operation.

The automation contains (Fig. 1) two blocks 1 ₁ and 1 _{2 of the} automatic consumer disconnect, two blocks 2 ₁ and 2 _{2 of} permission to automatically re-enable the feeders and a communication switch 3. Block 1 consumer disconnection automation contains (Fig. 2) contains a node 4 for determining the direction of power, a node 5 for monitoring the fault of a voltage transformer, an executive body 6, a node 7 for monitoring the health of the unit and its circuits, an alarm unit 8 and an oscilloscope 9 ₁ . Block 2 enable automatic re-enable feeders (figure 2) contains three nodes 10 ₁ ... 10 ₃ control accession, four elements OR 11 ₁ ... 11 ₄ , a group of elements OR 12, two start-up shutdown 13 ₁ and 13 ₂ , two start-up switching elements 14 ₁ and 14 ₂ , the terminal 15 control unit of the terminal malfunction, the signaling section 16 and the oscilloscope 9 ₂ .

Automation limitation of voltage busbar substation comprises two unit 1 ₁ and 1 ₂ Automated off consumers two unit 2 ₁ and 2 ₂ Enable automatic reclosing feeders, the switch 3 connection, the tenth input of the first February ₁ unit enabling automatic reclosing of feeders connected to the twelfth automation input, the tenth input of the first 1 ₁ block of consumer disconnection automation is connected to the first automation input, outputs from the first to eighth of each block 1 ₁ and 1 _{2 of} consumer disconnect automation are connected to the corresponding inputs of the communication switch 3, and the first and second inputs are connected to the corresponding outputs of the communication switch 3, the tenth and eleventh outputs and the eighth and ninth inputs of the first 1 ₁ of the consumer disconnection automation unit are connected respectively to the ninth and tenth outputs and the thirty and thirty first inputs automatics, the third and fourth inputs of which are connected respectively to the sixth and fourth inputs of the first block 1 _{1 of} the consumer disconnection automatics, the seventh input of which is connected to the second input and the fifth input of the second 1 ₂ block of consumer disconnection automation, the seventh input of which is connected to the eighth input of automation and the fifth input of the first 1 ₁ block of consumer shutdown automation, the ninth output and the third input of which are connected respectively with the third input and ninth output of the second 1 ₂ automation block consumer disconnection, the fourth, sixth and tenth inputs of which are connected respectively to the ninth, tenth and eleventh inputs of automation, the eleventh and twelfth outputs of which are connected respectively to the tenth and eleventh outputs of the second 1 ₂ block of automatic consumers off, the eighth and ninth inputs of which are connected respectively to the thirty-second and thirty-third inputs of automation, from the first to the ninth inputs of each block 2 ₁ and 2 _{2 of the} resolution of automatic re-enable feeders are connected to the corresponding outputs of the switch 3 communication, and the first and second outputs are connected to the corresponding inputs of the communication switch 3, from the eleventh to eighteenth inputs of the first 2 ₁ block authorization automatically re on the inclusion of feeders are connected respectively from the thirteenth to the twentieth inputs of automation, from the first to fourth outputs of which are connected respectively to the third to sixth outputs of the first 2 ₁ block of the automatic re-enable feeders, from the eleventh to eighteenth inputs of the second 2 ₂ block of the automatic re-enable feeders are connected respectively, from the twenty-first to twenty-eighth inputs of automation, the twenty-ninth input of which is connected to the tenth input of the second 2 ₂ permission block I automatically re-enable feeders, the fifth, sixth and seventh inputs and the thirteenth automation output are connected to the corresponding inputs of the communication switch 3, and the consumer disconnection automation unit 1 contains a node 4

determine the direction of power, the node 5 for monitoring the fault of the voltage transformer, the executive body 6, the node 7 for monitoring the health of the unit and its circuits, the signaling unit 8 and the oscilloscope 9 ₁ , the first to fourth inputs of which are connected to the outputs of the same body 6 and, respectively, from the tenth the thirteenth outputs of the block, the tenth input of which is connected to the first input of the measuring body 6 and the sixth inputs of the node 4 for determining the direction of power and the node 5 for controlling faults of a circuit connected to it a voltage transformer, the first to fifth inputs of which are connected respectively from the first to fifth inputs of the power direction determination unit 4 and the unit inputs of the same name, the sixth and seventh outputs of the power direction determination unit 4 are connected to the unit outputs of the same name, the seventh and eighth inputs of which are connected to the inputs of the same name node 4 determining the direction of power, the eighth output of which is connected to the third output of the block, the ninth input and tenth output of which are connected to the same input and output of the node 4 about determining the direction of power, the tenth input of which is connected to the fifth output of the actuator 6, the second and third inputs of which are connected respectively to the ninth and eleventh outputs of the power direction determining unit 4, the sixth input of the unit is connected to the input of the node 5 for monitoring the health of the terminal and its circuits, the output of which connected to the first input of the signaling unit 8, the third output of which is connected by the twelfth output of the unit, the fourth and fifth outputs of which are connected respectively to the first and second outputs of the signal unit 8 nation, the eleventh, twelfth and thirteenth inputs of the block are connected respectively with the fourth, fifth and sixth inputs of the executive body 6, from the fourteenth to eighteenth inputs of the block are connected respectively with the eleventh to fifteenth inputs of the power direction determining unit 4, and the block for automatically enabling the feeders again includes three node 10 ₁ ... 10 ₃ control accession, four elements OR 11 ₁ ... 11 ₄ , a group of elements OR 12, two start-up shutdown bodies 13 ₁ and 13 ₂ , two start-up control bodies 14 ₁ and 14 ₂ , the oscilloscope 9 ₂ , the signaling unit 16 and the terminal malfunction control unit 12, to which all signals of unit 2 are received, and its output is connected to the input of the signaling unit 16, the output of which is connected to the tenth output of the unit, the fifteenth and sixteenth inputs which are respectively connected to first and second inputs of said first OR gate, whose output is connected to a first input of the second OR gate ₁₁ January, a second input coupled to an output of a third OR gate March _11, a first input coupled to an output of the first trigger body including cheniya January _14, an input of which is combined with the input of the first trigger disabling organ January ₁₃ and connected to the first input unit, second input of which is connected to the combined second inputs of the starting inclusion body ₁₄ February and

second starting body off February _13, output of the second trigger body off February ₁₃ coupled to a second input of the third March ₁₁ OR gate, the output of the first starting off element 13 ₁ is connected to a second input of the fourth ₁₁ April OR gate having a first input connected to the output of the second trigger body inclusion Feb. _14, and output - with merged seventh inputs of the third 10 ₁ ... 10 _{3 Process} fitting control units, eighth inputs which are combined and connected to the output of the second OR gate ₁₁ February inputs OR element group 12 are connected to third Th yrnadtsaty block inputs and outputs connected respectively to the first through sixth inputs combined for all the third 10 ₁ ... 10 _{3 Process} fitting control units, with the ninth to tenth inputs of the first addition of ₁₀ January control node are connected respectively to the seventeenth, eighteenth and nineteenth block inputs, the twentieth, twenty-first and twenty-second inputs of which are connected respectively to the ninth, tenth and eleventh inputs of the second 10 ₂ connection control unit, twenty-third, twenty-fourth and twenty-fifth inputs blocks are connected respectively to the ninth, tenth and eleventh inputs of the third 10 ₃ connection control node, the third outputs of each 10 ₁ ... 10 ₃ connection control nodes are connected to the twelfth input of this block, the first and second outputs of each 10 ₁ ... 10 ₃ nodes connection control are connected to the inputs of the oscilloscope 9 ₂ and, respectively, from the first to sixth outputs of the block, from the seventh to ninth outputs of which are connected to the fourth output, respectively, of each 10 ₁ ... 10 ₃ connection control unit.

“Automatic equipment for limiting voltage reduction on substation buses” performs the functions of automating the power (quantity) control of consumers connected to substation voltages of 6-10 (35) kV with voltage of 110-220 kV and allows:

1) to prevent a dangerous decrease in voltage on the buses of electrical substations with a voltage of 110-220 kV in emergency and post-emergency conditions, unacceptable under conditions of load stability, by automatically switching off consumers;

2) prevent the occurrence of an "avalanche" of tension;

3) to ensure the minimum amount of disconnected consumers by automatically shutting down the minimum number of consumers (allowing short-term shutdown), necessary to restore the voltage to an acceptable level;

4) to ensure the shortest interruption in power supply to consumers by automatically reconnecting disconnected consumers after voltage is restored to a predetermined level.

Automation for limiting voltage reduction on substation buses was developed on the basis of microprocessor relay protection terminals and automation of the Universal Relay (UR) series manufactured by General

Electric (GE) N60 [3] and F35 [4]. Terminals of the UR series have been produced since 1997 and have proven themselves in the field of relay protection for power facilities of all voltage classes. This platform is a modular design, both in hardware and in software, which makes the terminals of the UR series flexible and scalable. Broad communication capabilities provide ease of combining terminals into a single complex based on modern standard communication protocols (e.g. DNP 3.0, Modbus TCP / IP, IEC 61850) with high reliability and data transfer speed. All terminals N60 and F35 are connected by a duplicated optical digital network (communication switch 3 - Fig. 1), constructed using duplicated communication equipment.

Automation of limiting voltage reduction on substation buses provides two operating modes: automatic and automated.

In automatic mode, everything in the event of an emergency related to a decrease in voltage on the 110 kV buses of any substation, the automation of this substation generates and issues commands to turn off 10 kV feeders appropriate for the situation.

In this emergency operation mode, if the automation of a given substation cannot restore normal voltage on the substation's buses, it generates and issues control signals using the digital communication channels to the automation of adjacent substations (taking into account the direction of energy transfer). The automation of any of the substations, receiving a command from the automation of an adjacent substation, processes this command according to the corresponding algorithm, and if the voltage on the buses of this substation reaches the corresponding value (slightly higher than the emergency), it starts the shutdown of 10 kV feeders with a delay of a certain time. If the voltage on the substation tires is higher than this value, the control command from the adjacent substation is blocked.

In the automated mode, the operational staff is able to generate and issue using the automated workstation (AWS) (not shown in FIG. 1) the following control commands in the automation of the selected substation:

- a command to unload feeders of the first stage;

- a command to unload feeders of the second stage;

- Automatic reclosure of substations disconnected by automation.

- Acknowledgment signaling command.

The automation elements of the substation level ensure the implementation of the following information technology functions:

- collection and processing of input analog and discrete signals characterizing the state of an object (substation);

- validation of discrete signals characterizing the state of power switching devices involved in the automation algorithm;

- transfer of information about the state of the facility (substation) to higher levels of the system;

- fixing control commands generated by the automation in the substation, and sending information about these commands to higher levels of the system;

- registration of emergencies and transfer of accumulated information to higher levels of the system;

- oscilloscope alarm parameters and the transfer of accumulated information to higher levels of the system.

Automation at each substation provides the implementation of the following control technological functions:

- automatic generation and issuance of control commands to disable feeders 6-10 (35) kV;

- processing teams of operational personnel;

- processing of commands received from the automation of adjacent substations;

- the formation and transfer of control commands to the automation of adjacent substations.

In addition, the automation of each of the substations provides the implementation of the following auxiliary functions:

- continuous monitoring and diagnostics of the status of terminals and intra-system communications of substation automation;

- Failure alarm hardware and software automation substation;

- registration of signals of malfunctions of automation;

- Forwarding of fault signals to higher levels of the system;

- providing a uniform time using GPS signals.

Ensuring the fulfillment of all the above functions is implemented on the basis of the microprocessor terminal N60 [3] and on the basis of the microprocessor terminal F35 [4] (figure 1).

When reducing the voltage on the bus system 110 (220) kV substation (Fig. 4), which is supplied through the transformers to the tenth inputs of the units for automatically switching off consumers (terminals N60) (Fig. 1), a command to turn off the queues is formed to restore it to a normal level loads of connections 6 (10) kV, powered by this system of buses 110 (220) kV. Analysis of the voltage on the 110 (220) kV buses and the formation of the turn-off command occurs at the N60 terminals, each of which is assigned to its 110 (220) kV bus system (Fig. 1). To do this, the voltage 110 (220) through the transformer enters the tenth input of the first block of consumer shutdown automation 1 ₁ and then to the first input of the actuator 6 (Fig. 2) and the sixth inputs of the power direction determination unit 4, the voltage transformer fault monitoring unit 5. As a result in

the unit for automatically switching off consumers 1 ₁ (in terminal N60) implements the following:

1) measuring organs for undervoltage, respond to a decrease in all interphase voltages of the monitored bus system to start automation queues;

2) additional time delay and the formation of automation queues on the basis of voltage-lowering measuring organs, the formation of load disconnection commands for a given substation;

3) the measuring organ of voltage recovery, responds to an increase in all interphase voltages on the controlled bus system to start automatic reclosure of disconnected connections;

4) the formation of teams to disconnect connections at adjacent substations with insufficient load disconnected at this substation, to restore voltage to a controlled bus system;

5) measuring bodies control the direction of power along the lines 110-220 kV to determine the direction of transmission of commands to disconnect the connections at adjacent substations;

6) commands are received and processed to disconnect interconnections from adjacent substations;

7) commands to disconnect connections coming from a higher center or emergency control systems are received and processed;

8) continuous monitoring and self-diagnosis is carried out, providing a local alarm system about a malfunction or system operation at a given substation, as well as an alarm to a higher center.

To perform these functions, the following information is received at N60 terminals:

1) the input 10 (Fig. 1, Fig. 2) of the voltage of the three phases from the secondary winding of the voltage transformer of the controlled bus system connected to the "star" and the voltage of the "open triangle" - to the analog inputs of the alternating voltage of the terminal;

2) currents of three phases from current transformers of all 110-220 kV lines connected to this substation (up to five lines) - to the analog AC inputs of the terminal (inputs 1 ... 5 of figure 2);

3) discrete signals about the position of the bus disconnectors of the monitored bus system of all lines 110-220 kV - to the discrete inputs of the terminal (inputs 14 ... 18 of figure 2);

4) to the inputs 7 ... 9, load shedding commands received on a separate communication channel from N60 terminals of adjacent substations - through a special communication module using the G.703 interface and a special direct communication protocol between UR series terminals;

5) To the 13th input, load shedding commands received via a communication channel from a higher center or from emergency control systems through a D20 data concentrator using DNP 3.0 protocol via a redundant Ethernet optical network;

6) discrete fault signals of F35 type load control terminals, received according to IEC 61850 GOOSE protocol via a duplicated optical Ethernet network (input 6, Fig. 2).

In addition, input 11 receives a lock-up of automatic reclosure reset from terminal F35, and input 13 receives a reclosure command from a higher center.

From the outputs of the terminal N60, in accordance with the laid down algorithms, the following output signals and control actions are generated and received (figure 2):

1) To the outputs 6 and 7 of the command to disconnect the load queues at the given substation, transmitted to block 2 (Fig. 1, Fig. 2) to enable automatic re-enable of feeders according to IEC 61850 GOOSE protocol via a duplicated optical Ethernet network;

2) On outputs 8 and 9 of the command for switching on from the automatic reclosure, and automatic reclosure from the higher center, for the load disconnected from the action of the AOSN, which are received in block 2 (Fig. 1, Fig. 2) for enabling automatic re-enable of feeders;

3) The outputs 1, 2, 3 and 9 of the AOSN stage disconnect command at adjacent substations transmitted to the N60 terminals at adjacent substations through a special communication module using the G.703 interface and a special direct communication protocol between the terminals of the UR series;

4) To output 5, discrete signals about the operation and malfunction of automation in the central signaling circuit of a given substation - through discrete outputs of the terminal;

5) To output 11, discrete signals about the operation and malfunction of the automation system to a higher center through a D20 data concentrator using DNP 3.0 protocol via a duplicated optical Ethernet network.

Formed in N60 commands to disable the load queues are received through the communication switch 3 (Fig. 1) to the inputs of the microprocessor terminal F35, which perform the following functions:

1) disconnection of connections in accordance with the accepted commands to disconnect queues;

2) automatic reconnection of connections previously disabled by the automation system, alternately in a predetermined order when voltage is restored on a 110-220 kV bus system with control of a predetermined voltage level after each connection is turned on;

3) exchange of signals about the inclusion of connections with other F35 terminals to ensure a coordinated alternate inclusion of connections;

4) continuous status monitoring and self-diagnosis;

5) continuous monitoring of the state of the communication channel.

To perform these functions, the following information is received in F35 terminals:

1) to the inputs 3 ... 14 of the command to disconnect the load queues from both N60 terminals according to the IEC 61850 GOOSE protocol via a duplicated Ethernet optical network;

2) to the inputs 15 ... 16 of the reclosure start command, and the reclosure start from a higher connection center from both N60 terminals according to IEC 61850 GOOSE protocol via a duplicated optical Ethernet network;

3) to the input 1 and 2 of the voltage of the three phases from the secondary winding of the voltage transformer of one (or two for the "two working bus systems" circuit) of a bus system (section) of 6-10 (35) kV connected to a "star" and the voltage is "open" triangle ”- to the analog inputs of the AC voltage of the terminal;

4) to the inputs 19, 22 and 25, phase A current from current transformers of controlled connections of 6-10 (35) kV connected to this bus system (section) - to the analog AC inputs of the terminal;

5) to the inputs 17, 20, 23, discrete signals about the position of the bus disconnectors of both bus systems 6-10 (35) kV of all controlled connections - to the discrete inputs of the terminal;

6) to the inputs 18, 21, 24 discrete signals about the position of the switches of controlled connections 6-10 (35) kV - to the discrete inputs of the terminal (additional information);

The terminal F35 in accordance with the embedded algorithms generates the following output signals and control actions:

1) to outputs 1, 3, 5 of the command to disable controlled connections - output relay of the terminal.

2) to outputs 2, 4, 6 of the command to re-enable controlled connections - terminal output relays;

3) to the outputs 7, 8, 9 of the command to block the automation of the controlled connections during the operation of the automation - the output relays of the terminal;

4) output 10 signals about the operation and malfunction of the controller to both N60 terminals according to IEC 61850 GOOSE protocol using a digital, duplicated, optical Ethernet network.

To ensure interaction between the system terminals, a highly reliable duplicated optical communication channel is organized according to IEC 61850 protocol via Ethernet. Communication channel redundancy is ensured by the use of redundant communication cards in terminals

optical communication channel, the use of highly reliable specialized duplicated optical network switches.

Thus, the claimed "automation of limiting the voltage reduction on the substation tires", developed on the basis of microprocessor relay protection terminals, can improve reliability and provide the possibility of rapid configuration changes.

LITERATURE

1. Device for stabilizing the voltage of a transformer substation. RF patent N 2159004, IPC G05F 1/30, 07/09/1999.

2. Automatic load shedding during voltage reduction. - The All-Union State Design and Research and Research Institute “Energy Network Project, Kazakh Branch, - Alma-Ata, 1975 (Extract from copy).

3. The system for measuring synchronous vectors and ensuring the stability of the N60 network. UR Series Operating Instructions, N60 revision: 4.9x

4. Relays of management of several feeders F35. UR Series Operating Instructions, F35 Edition: 4.4x

Claims (3)

1. Automation of load shedding when the voltage is reduced, comprising a unit for automatically switching off consumers and a unit for automatically re-enabling feeders, the input of which is connected to the output of the automation, the input of the unit for automatically disconnecting the consumers is connected to the input of the automation, a second unit for automatically switching off consumers, a communication switch and the second block allows automatic automatic re-enable feeders, outputs from the first to eighth of each block of automatic consumers off are connected to the corresponding inputs of the communication switch, and the first and second inputs are connected to the corresponding outputs of the communication switch, the tenth and eleventh outputs and the eighth and ninth inputs of the first block of consumer disconnection automation are connected respectively to the ninth and tenth outputs and the thirty and thirty first inputs of the automation, the third and the fourth inputs of which are connected respectively to the sixth and fourth inputs of the first block of consumer disconnection automation, the seventh input of which is connected to the second automation input and the fifth input of the second block of consumer disconnection automation, the seventh input is connected to the eighth input of automation and the fifth input of the first block of consumer shutdown automation, the ninth output and the third input of which are connected respectively to the third input and ninth output of the second block of consumer shutdown automation, fourth, sixth and tenth the inputs of which are connected respectively to the ninth, tenth and eleventh inputs of automation, the eleventh and twelfth outputs of which are connected respectively to the tenth and the eleventh outputs of the second block of consumer disconnection automation, the eighth and ninth inputs of which are connected to the thirty-second and thirty-third inputs of the automation, respectively, the first to ninth inputs of each block for automatically enabling feeders are connected to the corresponding outputs of the communication switch, and the first and second outputs are connected to the corresponding inputs of the communication switch, from the eleventh to the eighteenth inputs of the first block enable automatic re-enable feeders inens, respectively, from the thirteenth to twentieth inputs of automation, from the first to fourth outputs of which are connected respectively to the third to sixth outputs of the first block for automatically enabling the feeders, the eleventh to eighteenth inputs of the second block for automatically enabling the feeders are connected respectively from twenty-first to twenty-eighth inputs of automation, the twenty-ninth input of which is connected to the tenth input of the second block of automatic re-enable Turning feeders, fifth, sixth, seventh and thirteenth inputs automation output connected to respective inputs of a switch connection. 2. Automation according to claim 1, characterized in that the consumer power off automation unit includes a power direction determination unit, a voltage transformer fault monitoring unit, an executive body, a unit and its circuit health monitoring unit, an alarm unit and an oscilloscope, the first to fourth inputs of which connected to the same outputs of the executive body and, respectively, from the tenth to thirteenth outputs of the unit, the tenth input of which is connected to the first input of the measuring body and the sixth combined with it the inputs of the node for determining the direction of power and the node for monitoring the faults of the voltage transformer circuits, the first to fifth inputs of which are connected respectively from the first to fifth inputs of the node for determining the direction of power and the inputs of the unit of the same name, the sixth and seventh outputs of the node for determining the direction of power are connected to the outputs of the same name, seventh and the eighth inputs of which are connected to the inputs of the same name of the power direction determining unit, the eighth output of which is connected to the third output of the unit, ninth the first input and the tenth output of which are connected to the input and output of the power direction determining unit of the same name, the tenth input of which is connected to the fifth output of the executive body, the second and third inputs of which are connected to the ninth and eleventh outputs of the power direction determining unit, the sixth input of the unit is connected to the input the health monitoring node of the terminal and its circuits, the output of which is connected to the first input of the signaling node, the third output of which is connected by the twelfth output of the block, the fourth and fifth outputs which are connected respectively to the first and second outputs of the signaling unit, the eleventh, twelfth and thirteenth inputs of the block are connected respectively to the fourth, fifth and sixth inputs of the executive body, from the fourteenth to eighteenth inputs of the block are connected respectively from the eleventh to fifteenth inputs of the power direction determining unit. 3. The automation system according to claim 1, characterized in that the block for automatically enabling the feeders again includes three connection control nodes, four OR elements, a group of OR elements, two shutdown trigger elements, two start trigger elements, an oscilloscope, an alarm unit and a fault monitoring unit terminal, to which all the signals of the block are received, and its output is connected to the input of the signaling unit, the output of which is connected to the tenth output of the block, the fifteenth and sixteenth inputs of which are connected respectively to the first and the second inputs of the first OR element, the output of which is connected to the first input of the second OR element, the second input of which is connected to the output of the third OR element, the first input of which is connected to the output of the first start-up switching organ, the input of which is combined with the input of the first switching-off organ and connected to the first the input of the unit, the second input of which is connected to the combined inputs of the second start-up switching organ and the second starting disconnecting organ, the output of the second starting disconnecting organ is connected to the second input of the of the third OR element, the output of the first triggering organ is connected to the second input of the fourth OR element, the first input of which is connected to the output of the second triggering organ, and the output is connected to the seventh inputs of all three connection control nodes, the eighth inputs of which are combined and connected to the output of the second OR element, the inputs of the group of OR elements are connected from the third to fourteenth input of the block, and the outputs are connected respectively from the first to sixth inputs combined for all three control nodes from the ninth to tenth inputs of the first connection control node are connected respectively to the seventeenth, eighteenth and nineteenth inputs of the block, the twentieth, twenty first and twenty second inputs of which are connected to the ninth, tenth and eleventh inputs of the second connection control node, twenty third, twenty fourth and the twenty fifth inputs of the block are connected respectively to the ninth, tenth and eleventh inputs of the third connection control node, the third outputs of each control node the connections are connected to the twelfth input of this unit, the first and second outputs of each access control unit are connected to the inputs of the oscilloscope and, respectively, the first to sixth outputs of the unit, the seventh to ninth outputs of which are connected to the fourth output, respectively, of each access control unit.