CN114023608A - High-voltage circuit breaker and locking control system thereof - Google Patents
High-voltage circuit breaker and locking control system thereof Download PDFInfo
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- CN114023608A CN114023608A CN202111114701.4A CN202111114701A CN114023608A CN 114023608 A CN114023608 A CN 114023608A CN 202111114701 A CN202111114701 A CN 202111114701A CN 114023608 A CN114023608 A CN 114023608A
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- 238000001514 detection method Methods 0.000 claims abstract description 27
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 10
- 230000000875 corresponding effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a high-voltage circuit breaker and a locking control system thereof, which comprise a detection relay, a locking relay and a controller; the coil of the detection relay is used for being connected in series in a circuit breaker closing loop of at least one phase, and the controller is connected with the auxiliary contact of the detection relay in a sampling mode and used for collecting the times of circuit breaker closing signals; the controller is also connected with a latching relay in a control mode, and a normally closed contact of the latching relay is used for being connected in series in a closing loop of the circuit breaker; and when the controller detects that the closing signal of the circuit breaker generates the set times within the set time period, the controller controls the normally closed contact of the latching relay to be disconnected to latch the circuit breaker. The locking control system can set corresponding continuous operation times and interval time according to the parameters of the circuit breaker, so that when the high-voltage circuit breaker with the module reaches the times of closing operation in a short time, the closing operation of the high-voltage circuit breaker is locked, and the circuit breaker is prevented from being damaged.
Description
Technical Field
The invention relates to a high-voltage circuit breaker and a locking control system thereof, belonging to the technical field of high-voltage electrical appliances.
Background
There are a large variety of operating overvoltages with varying characteristics in the power system, and high voltage circuit breaker operation is a major cause of operating overvoltages. In high-voltage networks, the closing line overvoltage becomes the main operating overvoltage. Particularly, the overvoltage is more serious when the no-load line of the long-distance ultra-high voltage transmission line is switched on, and the line switching-on is a common operation in an electric power system. In order to limit the overvoltage of the on-off and no-load line, a breaker is provided with a parallel resistor as a main measure for limiting the overvoltage of the on-off and no-load line in a long-distance ultra-high voltage transmission line. The resistance value of the parallel resistor for limiting the overvoltage of the closing no-load line is about hundreds of ohms, when the line is in fault, multiple reclosing operations can be carried out, for the circuit breaker with the closing resistor, due to frequent closing operations, the closing resistor generates a large amount of heat in a short time, and the heat accumulation can cause the damage of the closing resistor and the whole circuit breaker.
Meanwhile, the circuit breakers of different manufacturers have different structural sizes and different closing resistance values, and the tolerance of the closing resistance to the generated heating quantity is different after the hot-line operation. If the function of limiting frequent switching-on operation of the high-voltage circuit breaker with the switching-on resistor in a short time is placed in a background protection or measurement and control device, different manufacturers need to be adapted to the protection and measurement and control device, the high-voltage circuit breakers with different technical parameters belong to different technical directions, the difficulty of technical fusion is high, and after the problems of improper parameter setting and the like occur, the responsibility is difficult to define.
Disclosure of Invention
The invention aims to provide a high-voltage circuit device and a locking control system thereof, which are used for solving the problems that a circuit breaker is damaged due to heat accumulation and a limiting module cannot be arranged in a background protection or measurement and control device.
In order to achieve the above object, the scheme of the invention comprises:
the invention relates to a locking control system of a high-voltage circuit breaker, which comprises a detection relay, a locking relay and a controller, wherein the detection relay is connected with the controller; the coil of the detection relay is used for being connected in series in a circuit breaker closing loop of at least one phase, and the controller is connected with the auxiliary contact of the detection relay in a sampling mode and used for collecting the times of circuit breaker closing signals; the controller is also connected with a latching relay in a control mode, and a normally closed contact of the latching relay is used for being connected in series in a closing loop of the circuit breaker;
and when the controller detects that the closing signal of the circuit breaker generates the set times within the set time period, the controller controls the normally closed contact of the latching relay to be disconnected to latch the circuit breaker.
According to the locking control system of the high-voltage circuit breaker, the locking control system is connected with the circuit breaker in series, and the locking control system can set corresponding continuous operation times and interval time according to the parameters of the circuit breaker, so that when the high-voltage circuit breaker with the module reaches the closing operation times in a short time, the closing operation of the high-voltage circuit breaker is locked, and the circuit breaker is prevented from being damaged.
Furthermore, the circuit breaker closing circuit is also connected with an alarm circuit in parallel, and a normally open contact and an indicator light of a latching relay are connected in series in the alarm circuit.
When the action times of the circuit breaker reach a set value within set time, the circuit breaker is locked and the indicator lamp is turned on at the same time, so that the current circuit breaker is prompted to be in a locked state, and the circuit breaker is more clearly understood.
Further, the detection relay coil is connected in parallel with a reverse protection circuit for preventing reverse current.
The reverse current and the protection circuit form a loop to protect the circuit through the parallel protection circuit.
Further, a power module for supplying power to the controller is used for being connected with a main control power supply of the circuit breaker.
The power module is directly connected with a main control power supply of the circuit breaker, and is convenient and fast.
Furthermore, there are 3 detection relays, are used for establishing ties on the closing circuit of 3 looks of circuit breaker respectively, the controller is the auxiliary contact of 3 detection relays of sampling connection respectively.
When the three-phase circuit breakers can not act simultaneously, a detection relay is arranged on each circuit breaker closing loop and used for detecting the action times and time of each phase circuit breaker.
The invention discloses a high-voltage circuit breaker, which comprises a circuit breaker closing loop and a locking control system, wherein the locking control system comprises a detection relay, a locking relay and a controller; a detection relay coil for detecting a closing signal of the circuit breaker is connected in series on at least one phase closing loop of the circuit breaker, and a controller is connected with an auxiliary contact of the detection relay in a sampling manner and used for acquiring the times of generating the closing signal of the circuit breaker; the controller is also connected with the latching relay in a control mode, and a normally closed contact of the latching relay is connected with a closing coil of the circuit breaker in series;
and when the controller detects that the closing signal of the circuit breaker generates the set times within the set time, the normally closed contact of the latching relay is controlled to be disconnected, and the circuit breaker is latched.
The high-voltage circuit breaker comprises a locking control system and a circuit breaker, wherein the locking control system is connected with the circuit breaker in series, and the locking control system can set corresponding continuous operation times and interval time according to parameters of the circuit breaker, so that when the high-voltage circuit breaker with the module reaches the closing operation times in a short time, the closing operation of the high-voltage circuit breaker is locked, and the circuit breaker is prevented from being damaged.
Furthermore, the circuit breaker closing circuit is also connected with an alarm circuit in parallel, and a normally open contact and an indicator light of a latching relay are connected in series in the alarm circuit.
When the action times of the circuit breaker reach a set value within set time, the circuit breaker is locked and the indicator lamp is turned on at the same time, so that the current circuit breaker is prompted to be in a locked state, and the circuit breaker is more clearly understood.
Further, the three-phase relay is connected in parallel with a protection circuit for preventing reverse current.
The reverse current and the protection circuit form a loop to protect the circuit through the parallel protection circuit.
Furthermore, a power supply module for supplying power to the controller is used for being connected with a main control power supply of the circuit breaker.
The power module is directly connected with a main control power supply of the circuit breaker, and is convenient and fast.
Furthermore, there are 3 detection relays, are used for establishing ties on the closing circuit of 3 looks of circuit breaker respectively, the controller is the auxiliary contact of 3 detection relays of sampling connection respectively.
When the three-phase circuit breakers can not act simultaneously, a detection relay is arranged on each circuit breaker closing loop and used for detecting the action times and time of each phase circuit breaker.
Drawings
Fig. 1 is a terminal wiring diagram of a circuit breaker self-defense lockout module;
fig. 2 is a functional block diagram of a circuit breaker self-defense lockout module;
fig. 3 is a schematic diagram of a circuit breaker self-defense lockout module in a circuit breaker closing circuit;
FIG. 4 is a module panel diagram;
fig. 5 is a protection timing diagram of a module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment of the system is as follows:
the invention provides a locking control system of a high-voltage circuit device, which is a terminal wiring diagram of a self-defense locking module of a circuit breaker as shown in figure 1, wherein the self-defense locking module of the circuit breaker is arranged on a three-phase circuit (A, B, C three-phase), wherein A1, B1 and C1 are anodes of each phase; a2, B2 and C2 are negative electrodes of each phase; the port 13 is connected with the anode, and the port 14 is connected with the cathode; the line connecting the port 13 and the port 14 is used for indicating the closing loop to be locked. As shown in fig. 2, the schematic block diagram of the self-defense blocking module of the circuit breaker is shown, and the self-defense blocking module of the circuit breaker mainly includes a relay and a control Module (MCU). The relay coils (KA, KB and KC) are respectively arranged at A, B, C three phases of the three-phase circuit, and the positive electrode and the negative electrode of each relay coil (KA, KB and KC) are connected with two diodes in series in parallel to prevent the circuit from flowing back. The control Module (MCU) is connected with a 5V power supply and used for supplying power; the MCU is also connected with normally open contacts of the KA, KB and KC relays in a sampling mode respectively, and meanwhile the MCU is also connected with the latching relays in a control mode, normally closed contacts of the latching relays are arranged on each phase of the three-phase circuit respectively, and the normally closed contacts of the latching relays are connected between circuits of negative poles (A2, B2 and C2) of each phase, namely between the port 11 and the port 12, between the port 21 and the port 22 and between the port 31 and the port 32, of relay current output respectively in series; the normally open contact of the latching relay is disposed between port 13 and port 14.
As shown in fig. 3, which is a schematic diagram of a circuit breaker self-defense blocking module in a circuit breaker closing circuit, the circuit breaker self-defense blocking module 1 is disposed on the circuit upstream of the circuit breaker closing circuit 2. A switch SM0 is arranged on each phase of the three-phase circuit between the circuit breaker self-defense locking module 1 and the circuit anode; an indicator lamp H1 for indicating the opening of the breaker closing circuit is arranged at the downstream of the connection line of the port 13 and the port 14, and the negative pole of the indicator lamp H1 is connected with the negative pole of the circuit.
The circuit breaker of each phase circuit in the circuit breaker closing circuit 2 is connected in series between the circuit breaker self-defense locking module 1 and the negative pole of each phase circuit, the circuit breaker adopts an air circuit breaker QF, closing coils YC1A, YC1B and YC1C of each phase air circuit breaker are connected in series between A2, B2 and C2 and the circuit negative pole, and normally closed contacts QF1A, QF1B and QF1C of each phase closing coil are respectively connected in series between closing coils YC1A, YC1B, YC1C and A2, B2 and C2. The positive pole and A2 of QF1A, QF1B, QF1C, B2, C2 are also connected in series with the normally closed contacts of KFA, KFB, KFC anti-tripping relays, A2, B2, C2 and the circuit negative pole are also connected in parallel with the normally open contacts of anti-tripping relays KFA, KFB, KFC, and simultaneously the normally open contacts of QF1A, QF1B and QF1C are connected between the ports 13 and 15 and are connected in parallel with the normally open contacts of anti-tripping relays KFA, KFB and KFC.
The power supply connected with the MCU can realize the output of a 5V stable power supply and supply power to the whole module; the MCU is used as a microprocessing unit to realize the analysis of collected data, judge whether the current high-voltage circuit breaker reaches the operation times within a set time length, and control the on-off of the opening and closing loop according to the operation result; KA. KB and KC are used as circuit breaker closing operation measuring units to measure the closing operation action of the circuit breaker and input the closing operation action to the MCU; the indicator light H1 is used as a signal output unit, can detect the protection state of the circuit breaker and sends a signal; the invention integrates the self-defense locking module of the circuit breaker into a module, as shown in fig. 4, the module panel is a module panel diagram, and a setting unit is arranged on the module panel to provide an input interface for setting the protection time and times for manual work.
Specifically, when the circuit breaker carries out the closing operation, SM0 is closed, circuit breaker closing coil YC1A, YC1B, YC1C gets electrified action, relay coil KA, KB, KC get electrified simultaneously, corresponding relay KA, KB, KC normally open contact is closed, in the action input MCU with the relay, MCU record this action and current time, the also corresponding action of circuit breaker in the twinkling of an eye of relay action, consequently, the action and the time of record relay also are equivalent to the action and the time of record circuit breaker. The MCU only records the current action and the current time of the relay, not the duration of the relay.
After the SM0 is closed, the circuit breaker closing coils YC1A, YC1B and YC1C are electrified, the normally closed contacts QF1A, QF1B and QF1C of the closing coils are disconnected, and the circuit from the port 21 to the port 52 is disconnected; the normally open contacts of the closing coils QF1A, QF1B and QF1C connected between the port 13 and the port 15 are closed, then the anti-tripping relay coils KFA, KFB and KFC are electrified, the normally open contacts of the corresponding anti-tripping relays KFA, KFB and KFC are closed, and the normally closed contacts of the anti-tripping relays KFA, KFB and KFC are opened. At the moment when the circuit between the port 21 and the port 52 is opened, the normally closed contacts QF1A, QF1B, QF1C of the closing coil are restored to the closed state, and the normally open contacts of the closing coils QF1A, QF1B, QF1C connected between the port 13 and the port 15 are restored to the opened state. At this moment, because the normally closed contacts of the anti-tripping relay coils KFA, KFB and KFC connected between the port 21 and the port 22 keep an open state, the circuit between the port 21 and the port 52 still is in an off state, but the circuit where the anti-tripping relay coils KFA, KFB and KFC are located keeps a conduction state, and the normally open contacts of the anti-tripping relays KFA, KFB and KFC keep a closed state, so that the circuit keeps a closing state.
The MCU records once each action of the circuit breaker, and corresponding closing times and time can be recorded when the circuit breaker executes the next closing operation. When the action times of the circuit breaker exceed a set value within a set time, the circuit breaker self-defense locking module 1 disconnects the normally closed contacts of the locking relays connected to the port 11 and the port 12, so that a closing loop of the circuit breaker is disconnected, and the circuit breaker can not be closed within a set time period. And meanwhile, the normally open contacts of the latching relays connected to the port 13 and the port 14 are closed, an indicator lamp H1 is lightened, and a signal of latching of the circuit breaker is output.
Specifically, as shown in fig. 5, a protection timing diagram of the module is set such that the closing operation is performed 3 times within 40 minutes, and the circuit breaker needs to rest for 3 hours to perform the closing operation. When the circuit breaker starts to act, the MCU detects that the normally closed contact of the latching relay is closed, when the circuit breaker performs closing action for 3 times within 40 minutes, namely the MCU detects that the normally closed contact of the latching relay is closed for 3 times, the MCU controls the coil of the latching relay to break the normally closed contact of the latching relay, and after the time of the 3 times of closing action of the circuit breaker and the time of keeping the normally closed contact of the latching relay to be disconnected are accumulated for 3 hours, the normally closed contact of the latching relay is recovered to be in a closed state. If the circuit breaker does not operate for 3 times within 40 minutes, the normally closed contact of the latching relay is kept closed and does not operate.
The invention provides a circuit breaker self-defense locking module of a high-voltage circuit breaker with a protective belt closing resistor, which can be made into a specific electric element, and the electric element is installed in a closing control loop of the high-voltage circuit breaker. As shown in fig. 4, when the setting button is pressed for the first time to set the time, the nixie tube starts to strobe; pressing a key representing 'plus' or 'minus' is used for setting specific time; and pressing a determining key to determine the current set time, wherein the set time is finished at the moment. Pressing the set key again, and stroboscopic starting of the nixie tube; pressing a key representing 'plus' or 'minus' is used for setting specific times; and pressing a confirming key to confirm the current set times, wherein the set times are also set.
The invention provides a locking control system of a high-voltage circuit device, which is characterized in that when the closing operation times of a circuit breaker reaches a set value within a set time, an electrical element breaks a closing operation loop of the circuit breaker to lock the closing operation function of the circuit breaker. And when the time reaches or exceeds a set value, automatically recovering the closing operation function of the circuit breaker. Thereby protecting the high-voltage circuit breaker of the closing resistor from being damaged. The setting value of the module can be obtained by calculation according to the thermal capacity parameter of the closing resistor of the high-voltage circuit breaker. The problem of current high voltage circuit breaker of taking closing resistor frequently operate under electrified operating mode and cause closing resistor to generate heat and damage is solved.
In the closing circuit of the circuit breaker, if the three-phase circuit breakers act simultaneously, only the locking control system needs to be installed on the locking control circuit of one of the three-phase circuit breakers, and if the three phases of the closing circuit of the circuit breaker act respectively, the locking control system is installed on the locking control circuit of the three-phase circuit breaker respectively.
The embodiment of the circuit breaker comprises:
the high-voltage circuit breaker in this embodiment adopts the lockout control system of the high-voltage circuit breaker, which is sufficiently clear from the description of the system embodiment and is not described herein again.
Claims (10)
1. A locking control system of a high-voltage circuit breaker is characterized by comprising a detection relay, a locking relay and a controller; the coil of the detection relay is used for being connected in series in a circuit breaker closing loop of at least one phase, and the controller is connected with the auxiliary contact of the detection relay in a sampling mode and used for collecting the times of circuit breaker closing signals; the controller is also connected with a latching relay in a control mode, and a normally closed contact of the latching relay is used for being connected in series in a closing loop of the circuit breaker;
and when the controller detects that the closing signal of the circuit breaker generates the set times within the set time period, the controller controls the normally closed contact of the latching relay to be disconnected, and the circuit breaker is latched.
2. The lockout control system of a high voltage circuit breaker according to claim 1, wherein the circuit breaker closing circuit is further connected in parallel with an alarm circuit, and a normally open contact and an indicator light of a lockout relay are connected in series in the alarm circuit.
3. The latch control system of the high voltage circuit breaker according to claim 2, wherein the sensing relay coil is connected in parallel with a reverse protection circuit for preventing a reverse current.
4. The lockout control system of a high voltage circuit breaker of claim 3, wherein the power module for powering the controller is configured to connect to a main control power supply of the circuit breaker.
5. The blocking control system of high voltage circuit breaker as claimed in claim 4, wherein there are 3 detection relays for being connected in series to the 3-phase closing circuit of the circuit breaker, and the controller samples and connects the auxiliary contacts of the 3 detection relays.
6. The high-voltage circuit breaker is characterized by comprising a circuit breaker closing loop and a locking control system, wherein the locking control system comprises a detection relay, a locking relay and a controller; a detection relay coil for detecting a closing signal of the circuit breaker is connected in series on at least one phase closing loop of the circuit breaker, and a controller is connected with an auxiliary contact of the detection relay in a sampling manner and used for acquiring the times of generating the closing signal of the circuit breaker; the controller is also connected with the latching relay in a control mode, and a normally closed contact of the latching relay is connected with a closing coil of the circuit breaker in series;
and when the controller detects that the switching-on signal of the circuit breaker generates the set times within the set time, the controller controls the normally closed contact of the latching relay to be switched off to latch the circuit breaker.
7. The high-voltage circuit breaker according to claim 6, characterized in that the circuit breaker closing circuit is further connected in parallel with an alarm circuit, and a normally open contact of a latching relay and an indicator light are connected in series in the alarm circuit.
8. The high voltage circuit breaker according to claim 7, characterized in that said sensing relay coil is connected in parallel with a reverse protection circuit for preventing reverse current.
9. The high voltage circuit breaker according to claim 8, wherein the power module for powering the controller is adapted to be connected to a main control power supply of the circuit breaker.
10. The high voltage circuit breaker according to claim 9, wherein there are 3 detection relays for being connected in series to the 3-phase closing circuit of the circuit breaker, and the controller samples and connects the auxiliary contacts of the 3 detection relays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111114701.4A CN114023608A (en) | 2021-09-23 | 2021-09-23 | High-voltage circuit breaker and locking control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111114701.4A CN114023608A (en) | 2021-09-23 | 2021-09-23 | High-voltage circuit breaker and locking control system thereof |
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| CN114023608A true CN114023608A (en) | 2022-02-08 |
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| CN202111114701.4A Pending CN114023608A (en) | 2021-09-23 | 2021-09-23 | High-voltage circuit breaker and locking control system thereof |
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