CN110739179A - transformer substation circuit breaker control loop and monitoring method thereof - Google Patents
transformer substation circuit breaker control loop and monitoring method thereof Download PDFInfo
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- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
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Abstract
The invention discloses transformer substation circuit breaker control loops and a monitoring method thereof, wherein the control loops are connected with a tripping control loop and/or a closing control loop between an operating power supply anode and an operating power supply cathode, the tripping control loop and/or the closing control loop are connected in parallel between the operating power supply anode and the operating power supply cathode, the OPT1, OPT2, OPT3 and OPT4 optical coupling loops on the control loops sense the action correctness of detection contacts of a relay, and HWJ optical coupling loops and TWJ optical coupling loops sense the electrical integrity of the relay control loops.
Description
Technical Field
The invention relates to transformer substation circuit breaker control loops and a monitoring method thereof, and belongs to the technical field of transformer substation operation and maintenance.
Background
, operation and maintenance personnel check or overhaul (maintain, debug, test) various control loops according to the maintenance period and equipment outage plans specified by electrical equipment of a power system, wherein the period is years or several years, which is known as regular maintenance.
With the continuous development of power grids, the scale of the transformer substation is gradually enlarged, and the workload caused by periodic maintenance becomes a heavy burden for operation and maintenance personnel of the transformer substation. In recent years, state inspection and repair modes are proposed by national network companies, namely, equipment evaluates the health state of the equipment in real time, and arranges inspection and repair work when determining that the circuit is abnormal or has faults. The condition inspection enables a maintenance person or an expert to quickly predict the future condition of the equipment according to the previous and current conditions of the equipment, and determine when and where the equipment should be inspected.
The breaker is an important -time device in a transformer substation, when a system fails, the protection device and the intelligent terminal are matched together to control the breaker, so that fault current can be cut off rapidly, the accident expansion is prevented, and the stable operation of the whole power system is ensured.
At present, the circuit breaker is limited in the on-line real-time monitoring mode of the circuit breaker and the tripping and closing control loops thereof, the circuit breaker is maintained mainly in the regular maintenance mode, huge workload is brought to on-site operation and maintenance personnel, how to realize on-line blind-area-free monitoring of the tripping and closing control loops of the circuit breaker is achieved, and the method has important significance for truly realizing state maintenance of the circuit breaker.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides transformer substation circuit breaker control loops and a monitoring method thereof, which can monitor the integrity and correctness of the control loops simultaneously and realize the rapid state maintenance of the whole control loop.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
A substation breaker control loop comprises a trip control loop and/or a closing control loop, wherein the trip control loop is connected between an operating power supply positive electrode and an operating power supply negative electrode and is used for controlling the tripping of a substation breaker, the trip control loop is connected with a trip monitoring loop in parallel and is used for monitoring the working state of a switch node in the trip control loop, the closing control loop is connected between the operating power supply positive electrode and the operating power supply negative electrode and is used for controlling the closing of the substation breaker, the closing control loop is connected with a closing monitoring loop in parallel and is used for monitoring the working state of the switch node in the closing control loop.
Preferably, the trip control loop comprises a trip relay junction J1, a trip relay second junction J2, a junction J1 and a second junction J2 which are connected in series with a trip pressure plate, a trip keeping coil TBJ, a breaker internal contact DL1 and the trip coil, a junction TBJA of the trip keeping coil TBJ is connected in parallel between the positive pole of an operating power supply and a common point of the trip pressure plate and the trip keeping coil TBJ, the trip monitoring loop comprises an OPT1 optical coupling loop and an OPT2 optical coupling loop, the OPT1 optical coupling loop is connected in parallel between the positive pole of the operating power supply and a common point of a junction 1 and a second junction J2, and the OPT2 optical coupling loop is connected in parallel between a junction J1 and a common point of a junction J2 of the operating power supply and a common point of the trip pressure plate and the trip keeping coil TBJ.
Preferably, the circuit further comprises a TWJ optical coupling loop, and the TWJ optical coupling loop is connected between the positive pole of the operating power supply and the common point of the tripping pressure plate and the tripping holding coil TBJ in parallel.
As a preferable scheme, when currents in the OPT1 optical coupling loop and the OPT2 optical coupling loop are larger than a threshold value, indicator lights in the OPT1 optical coupling loop and the OPT2 optical coupling loop are turned on, and signals are set to be 1; when the current is smaller than the threshold value, indicator lights in an OPT1 optical coupling loop and an OPT2 optical coupling loop are not on, and the signal is set to be 0; the threshold value is larger than the series current of the OPT1 optical coupling loop and the OPT2 optical coupling loop and smaller than the smaller value of two independent conduction currents of the OPT1 optical coupling loop and the OPT2 optical coupling loop.
As a preferred scheme, a TWJ optical coupling loop is conducted, an indicator light in the TWJ optical coupling loop is turned on, and a signal is set to be 1; and the TWJ optical coupling loop is not conducted, an indicator lamp is not on, and a signal is set to be 0.
As a preferred scheme, the closing control circuit comprises: the third joint J3 and the fourth joint J4 of the switching-on relay are connected in series, and the third joint J3 and the fourth joint J4 are connected in series with a switching-on pressing plate, a switching-on holding coil HBJ, a breaker internal contact DL2 and a switching-on coil; a contact point HBJA of the closing holding coil HBJ is connected in parallel between the positive electrode of the operating power supply and a common point of the closing pressing plate and the closing holding coil HBJ; the closing monitoring circuit comprises: an OPT3 optical coupling loop and an OPT4 optical coupling loop, wherein the OPT3 optical coupling loop is connected between the positive electrode of the operating power supply and a common point of a third joint J3 and a fourth joint J4 in parallel; the OPT4 optical coupling loop is connected in parallel between the common point of the third joint J3 and the fourth joint J4 and the common point of the closing pressure plate and the closing holding coil HBJ.
Preferably, the automatic switching device further comprises an HWJ optical coupling loop, and the HWJ optical coupling loop is connected in parallel between the positive electrode of the operating power supply and a common point of the switching-on pressure plate and the switching-on maintaining coil HBJ.
As a preferable scheme, when currents in the OPT3 optical coupling loop and the OPT4 optical coupling loop are larger than a threshold value, indicator lights in the OPT3 optical coupling loop and the OPT4 optical coupling loop are turned on, and signals are set to be 1; when the current is smaller than the threshold value, indicator lights in an OPT3 optical coupling loop and an OPT4 optical coupling loop are not on, and the signal is set to be 0; the threshold value is larger than the series current of the OPT3 optical coupling loop and the OPT4 optical coupling loop and smaller than the smaller value of two independent conduction currents of the OPT3 optical coupling loop and the OPT4 optical coupling loop.
As a preferred scheme, an HWJ optical coupling loop is conducted, an indicator light in a HWJ optical coupling loop is turned on, and a signal is set to be 1; and when the optical coupler is not conducted, an indicator lamp in the HWJ optical coupling loop is not on, and a signal is set to be 0.
method for monitoring control loop of circuit breaker of transformer substation comprises monitoring a tripping control loop and/or a closing control loop, controlling the on-off state of an open joint point in the tripping control loop, judging the working states of the open joint point and the optical coupling loop according to the on-off condition of an indicator light of the optical coupling loop, controlling the on-off state of the open joint point in the closing control loop, and judging the working states of the open joint point and the optical coupling loop according to the on-off condition of the indicator light of the optical coupling loop.
Preferably, the control command is that the th joint J1 and the second joint J2 are both disconnected, when signals of an OPT1 optical coupling loop and an OPT2 optical coupling loop are both 0, a th joint J1 and a second joint J2 are output normally, when the signal of the OPT1 optical coupling loop is 0, the signal of an OPT2 optical coupling loop is 1, the J1 of the th joint is output abnormally, when the signal of the OPT1 optical coupling loop is 1, the signal of an OPT2 optical coupling loop is 0, the J2 of the second joint is output abnormally, when the signal of the OPT1 optical coupling loop is 1, the signal of the OPT2 optical coupling loop is 1, the optical coupling loop of the OPT1 and the optical coupling loop of the OPT2 are output abnormally;
when the OPT1 opto-coupler loop signal is 0, the OPT2 opto-coupler loop signal is 1, the junction J1 and the second junction J2 are abnormal, when the OPT1 opto-coupler loop signal is 1, the OPT2 opto-coupler loop signal is 0, the second junction J2 is normal, when the OPT1 opto-coupler loop signal is 1, the OPT2 opto-coupler loop signal is 1, the OPT1 opto-coupler loop and the OPT2 opto-coupler loop are abnormal;
the control command is that an -th contact J1 is closed, a second contact J2 is open, when signals of an OPT1 optical coupling loop and an OPT2 optical coupling loop are both 0, a -th contact J1 is output abnormally, when a signal of an OPT1 optical coupling loop is 0, a signal of an OPT2 optical coupling loop is 1, a -th contact J1 is output normally, when a signal of an OPT1 optical coupling loop is 1, a signal of an OPT2 optical coupling loop is 0, a -th contact J1 and a second contact J2 are output abnormally, and when a signal of an OPT1 optical coupling loop is 1, a signal of an OPT2 optical coupling loop is 1, an OPT1 optical coupling loop and an OPT2 optical coupling loop are output abnormally.
Preferably, when the TWJ optical coupling loop signal is 0, the OPT1 optical coupling loop and the OPT2 optical coupling loop are output to be abnormal or the junction J1 and the second junction J2 are output to be abnormal closed, and when the TWJ optical coupling loop signal is 1, the output can be subjected to a self-checking program.
Preferably, the control command is th joint J1, the second joint J2 is closed, the trip control loop is in a working state, and the output exits from the self-test program.
Preferably, the control command is that both the second joint J3 and the fourth joint J4 are open: when signals of the OPT3 optical coupling loop and the OPT4 optical coupling loop are both 0, outputting a third joint J3 and a fourth joint J4 to be normal; when the OPT3 optical coupling loop signal is 0 and the OPT4 optical coupling loop signal is 1, outputting that the third joint J3 is abnormal; when the OPT3 optical coupling loop signal is 1 and the OPT4 optical coupling loop signal is 0, outputting that the fourth joint J4 is abnormal; when an OPT3 optical coupling loop signal is 1 and an OPT4 optical coupling loop signal is 1, outputting an OPT3 optical coupling loop and an OPT4 optical coupling loop abnormality;
the control commands are that the third joint J3 is open and the fourth joint J4 is closed: when signals of an OPT3 optical coupling loop and an OPT4 optical coupling loop are both 0, outputting a fourth joint J4 or abnormal closing pressure plate; when the OPT3 optical coupling loop signal is 0 and the OPT4 optical coupling loop signal is 1, outputting abnormity of a third joint J3 and a fourth joint J4; when the OPT3 optical coupling loop signal is 1 and the OPT4 optical coupling loop signal is 0, outputting a fourth junction J4 to be normal; when an OPT3 optical coupling loop signal is 1 and an OPT4 optical coupling loop signal is 1, outputting an OPT3 optical coupling loop and an OPT4 optical coupling loop abnormality;
the control commands are that the third joint J3 is closed and the fourth joint J4 is open: when signals of the OPT3 optical coupling loop and the OPT4 optical coupling loop are both 0, outputting that a third joint J3 is abnormal; when the OPT3 optical coupling loop signal is 0, the OPT4 optical coupling loop signal is 1, and the output third joint J3 is normal; when the OPT3 optical coupling loop signal is 1 and the OPT4 optical coupling loop signal is 0, outputting the abnormality of a third joint J3 and a fourth joint J4; when an OPT3 optical coupling loop signal is 1 and an OPT4 optical coupling loop signal is 1, an OPT3 optical coupling loop and an OPT4 optical coupling loop are output to be abnormal.
Preferably, when the HWJ optical coupling loop signal is 0, the output OPT3 optical coupling loop and the OPT4 optical coupling loop are abnormal or the third joint J3 and the fourth joint J4 are abnormally closed; when the HWJ optocoupler loop signal is 1, the output can be subjected to a self-test program.
Preferably, the control commands are that the third joint J3 and the fourth joint J4 are both closed: and the closing control loop is in a working state, and the output exits from the self-checking program.
The transformer substation circuit breaker control loops and the monitoring method thereof have the advantages that the operating state of the joint point in the control loop is judged by analyzing the signal condition of the monitoring loop through the control loop connected in series between the operating power supply and the internal contact of the circuit breaker and the monitoring loop connected in parallel on the control loop, so that the operating state can meet the requirement when the switch node controls the circuit breaker to be opened or closed, and the action correctness of the circuit breaker is ensured.
Specifically, the working states of switch nodes in a tripping or closing control loop are respectively judged through OPT1, OPT2, OPT3 and OPT4 optical coupling loops which are connected in parallel to the control loop, and when the control circuit breaker is opened or closed, the switch nodes in the control loop are in a normal state, so that the whole control loop can correctly act as required, and the state maintenance of the whole control loop is realized.
In addition, whether the monitoring loop normally works is judged by analyzing signals of the HWJ optical coupling loop and the TWJ optical coupling loop through an HWJ optical coupling loop and a TWJ optical coupling loop which are connected to the control loop in parallel, so that the electrical integrity of the relay control loop with the monitoring loop is ensured.
Drawings
FIG. 1 is a schematic diagram of a control circuit according to the present invention.
Detailed Description
The invention is further described with reference to the following figures.
As shown in FIG. 1, transformer substation circuit breaker control loops comprise a tripping control loop and a closing control loop which are connected between the positive pole of an operating power supply and the negative pole of the operating power supply, and the tripping control loop and the closing control loop are connected between the positive pole of the operating power supply and the negative pole of the operating power supply in parallel.
The trip control loop comprises a trip relay junction J1, a trip relay second junction J2, an junction J1 and a second junction J2 which are connected in series with a trip pressure plate, a trip holding coil TBJ, a breaker internal contact DL1 and a trip coil, a junction TBJA of the trip holding coil TBJ is connected in parallel between the positive pole of an operating power supply and a common point of the trip pressure plate and the trip holding coil TBJ, an OPT1 optical coupling loop is connected in parallel between the positive pole of the operating power supply and a common point of a junction J and a junction J2, an OPT2 optical coupling loop is connected in parallel between a junction 1 of a junction J1 and a common point of a junction J2 and a common point of the trip pressure plate and the trip holding coil TBJ, and a TWJ optical coupling loop is connected in parallel between the positive pole of the operating power supply and the common point of the trip pressure plate and the trip holding coil 36.
The closing control circuit includes: the third joint J3 and the fourth joint J4 of the switching-on relay are connected in series, and the third joint J3 and the fourth joint J4 are connected in series with a switching-on pressing plate, a switching-on holding coil HBJ, a breaker internal contact DL2 and a switching-on coil; a contact point HBJA of the closing holding coil HBJ is connected in parallel between the positive electrode of the operating power supply and a common point of the closing pressing plate and the closing holding coil HBJ; the OPT3 optical coupling loop is connected in parallel between the positive pole of the operating power supply and the common point of the third joint J3 and the fourth joint J4; the OPT4 optical coupling loop is connected in parallel between the common point of the third joint J3 and the fourth joint J4 and the common point of the closing pressure plate and the closing holding coil HBJ; HWJ optical coupling loop is connected in parallel between the positive pole of the operation power supply and the common point of the closing pressure plate and the closing holding coil HBJ.
When the breaker in the substation is about to do a tripping action, the controller sends a closing signal to the th joint J1 and the second joint J2 and sends a working signal to the tripping holding coil TBJ, the th joint J1 and the second joint J2 are closed, the tripping holding coil TBJ works, the tripping pressing plate is in a closed state when a control loop is normal, the internal contact DL1 of the breaker is in the closed state, the tripping coil is conducted, the breaker is opened, the joint TBJA is closed due to the operation of the tripping holding coil TBJ, the current between the tripping coils is kept, after the breaker is tripped, the internal contact DL1 of the breaker is opened, the tripping coil restores to the initial state, and the internal contact DL2 of the breaker is closed.
When a breaker in a transformer substation needs to perform closing action, the controller sends a closing signal to the third joint J3 and the fourth joint J4 and sends a working signal to a closing holding coil HBJ; the third joint J3 and the fourth joint J4 are closed, and the closing holding coil HBJ works; when the control circuit is normal, the closing pressure plate is in a closed state, the internal contact DL2 of the circuit breaker is in a closed state, the closing coil is conducted, and the circuit breaker is closed. Since the closing hold coil TBJ is operated, the contact HBJA is closed, and the current between the closing coils is held. After the circuit breaker is switched on, the internal contact DL2 of the circuit breaker is disconnected, the switching-on coil is restored to the initial state, and the internal contact DL1 of the circuit breaker is closed.
When the first connecting point J1 and the second connecting point J2 are disconnected, an OPT1 optical coupling loop, an OPT2 optical coupling loop and a TWJ optical coupling loop pass through current, and because the resistance in the OPT1 optical coupling loop, the OPT2 optical coupling loop and the TWJ optical coupling loop is far larger than the resistance in a tripping holding coil TBJ and the resistance in a tripping coil conducting state, the current flowing through the OPT1 optical coupling loop, the OPT2 optical coupling loop and the TWJ optical coupling loop is smaller than the working current of the tripping holding coil TBJ and the tripping coil, enough magnetic force cannot be generated to enable an armature to act, but the conduction of the OPT1 optical coupling loop, the OPT2 optical coupling loop and the TWJ optical coupling loop can be maintained, if the first connecting point J1 and the second connecting point J2 are closed, the optical coupling loop is equivalent to the OPT1 optical coupling loop, the OPT2 optical coupling loop and the TWJ optical coupling loop are short-circuited, the OPT1 optical coupling loop, the OPT2 loop and the indicating lamp of the TWJ optical.
When the current in the OPT1 optical coupling loop and the OPT2 optical coupling loop is larger than the threshold value, indicator lights in the OPT1 optical coupling loop and the OPT2 optical coupling loop are turned on, and the signal is set to be 1; when the current is smaller than the threshold value, indicator lamps in an OPT1 optical coupling loop and an OPT2 optical coupling loop are not on, and the signal is set to be 0. The threshold value can be larger than the series current of the OPT1 optical coupling loop and the OPT2 optical coupling loop, and smaller than the smaller value of two independent conduction currents of the OPT1 optical coupling loop and the OPT2 optical coupling loop. The TWJ optical coupling loop is conducted, an indicator light in the TWJ optical coupling loop is turned on, and a signal is set to be 1; and the TWJ optical coupling loop is not conducted, an indicator lamp is not on, and a signal is set to be 0.
When third contact J3, when fourth contact J4 disconnection, OPT3 opto-coupler circuit, OPT4 opto-coupler circuit, HWJ opto-coupler circuit has the electric current to pass through, because OPT3 opto-coupler circuit, OPT4 opto-coupler circuit, resistance is far greater than closing holding coil HBJ in the HWJ opto-coupler circuit, resistance during closing coil on-state, so flow through OPT3 opto-coupler circuit, OPT4 opto-coupler circuit, the electric current in HWJ opto-coupler circuit is less than closing holding coil HBJ, closing coil's operating current, there is not enough magnetic force to make armature move, but can keep switching on of OPT3 opto-coupler circuit, OPT4 opto-coupler circuit, switching on of HWJ opto-coupler circuit. If third joint J3, fourth joint J4 are closed, be equivalent to OPT3 opto-coupler return circuit, OPT4 opto-coupler return circuit, HWJ opto-coupler return circuit by the short circuit, current is less than and sets for the threshold value in OPT3 opto-coupler return circuit, OPT4 opto-coupler return circuit, the HWJ opto-coupler return circuit, and the pilot lamp of opto-coupler return circuit can not light.
When the current in the OPT3 optical coupling loop and the OPT4 optical coupling loop is larger than the threshold value, indicator lights in the OPT3 optical coupling loop and the OPT4 optical coupling loop are turned on, and the signal is set to be 1; when the current is smaller than the threshold value, indicator lamps in an OPT3 optical coupling loop and an OPT4 optical coupling loop are not on, and the signal is set to be 0. The threshold value can be larger than the series current of the OPT3 optical coupling loop and the OPT4 optical coupling loop, and smaller than the smaller value of two independent conduction currents of the OPT3 optical coupling loop and the OPT4 optical coupling loop. HWJ optical coupling loop is conducted, an indicator light in HWJ optical coupling loop is lighted, and a signal is set to be 1; and when the optical coupler is not conducted, an indicator lamp in the HWJ optical coupling loop is not on, and a signal is set to be 0.
In order to ensure that the circuit breaker in the substation correctly acts when needed, daily monitoring of the junction J1, the second junction J2, the trip pressure plate, the third junction J3, the fourth junction J4 and the closing pressure plate in the control circuit is very important, and the monitoring method of the control circuit is described below.
transformer substation circuit breaker control loop monitoring methods include trip control loop monitoring and closing control loop monitoring.
Trip control loop monitoring comprising the steps of:
the control command is that the th joint J1 and the second joint J2 are both open:
when signals of an OPT1 optical coupling loop and an OPT2 optical coupling loop are both 0, a TWJ optical coupling loop signal is 1, and a th joint J1 and a second joint J2 are output normally;
when an OPT1 optical coupling loop signal is 0, an OPT2 optical coupling loop signal is 1, a TWJ optical coupling loop signal is 1, and abnormal J1 at the th joint is output;
when the OPT1 optical coupling loop signal is 1, the OPT2 optical coupling loop signal is 0, the TWJ optical coupling loop signal is 1, and the output second joint J2 is abnormal;
when an OPT1 optical coupling loop signal is 1, an OPT2 optical coupling loop signal is 1, a TWJ optical coupling loop signal is 1, an OPT1 optical coupling loop and an OPT2 optical coupling loop are output to be abnormal;
the control command is that the th joint J1 is opened, the second joint J2 is closed:
when signals of an OPT1 optical coupling loop and an OPT2 optical coupling loop are both 0, a TWJ optical coupling loop signal is 1, and a second joint J2 or a tripping pressing plate is output to be abnormal;
when an OPT1 optical coupling loop signal is 0, an OPT2 optical coupling loop signal is 1, a TWJ optical coupling loop signal is 1, and abnormity is output at a -th joint J1 and a second joint J2;
when an OPT1 optical coupling loop signal is 1, an OPT2 optical coupling loop signal is 0, a TWJ optical coupling loop signal is 1, and a second joint J2 is output normally;
when an OPT1 optical coupling loop signal is 1, an OPT2 optical coupling loop signal is 1, a TWJ optical coupling loop signal is 1, an OPT1 optical coupling loop and an OPT2 optical coupling loop are output to be abnormal;
the control command is that the th joint J1 is closed, the second joint J2 is opened:
when signals of an OPT1 optical coupling loop and an OPT2 optical coupling loop are both 0, a TWJ optical coupling loop signal is 1, and abnormal J1 of a th joint is output;
when an OPT1 optical coupling loop signal is 0, an OPT2 optical coupling loop signal is 1, a TWJ optical coupling loop signal is 1, and an output th joint J1 is normal;
when an OPT1 optical coupling loop signal is 1, an OPT2 optical coupling loop signal is 0, and a TWJ optical coupling loop signal is 1, outputting abnormity of a th joint J1 and a second joint J2;
when an OPT1 optical coupling loop signal is 1, an OPT2 optical coupling loop signal is 1, a TWJ optical coupling loop signal is 1, an OPT1 optical coupling loop and an OPT2 optical coupling loop are output to be abnormal;
the control command is th joint J1, and the second joint J2 is closed, namely the trip control loop is in a working state, and the output exits the self-checking program;
when the TWJ optical coupling loop signal is 0, the output OPT1 optical coupling loop and the OPT2 optical coupling loop are abnormal or the th joint J1 and the second joint J2 are abnormally closed.
In the control process, when a TWJ optical coupling loop signal is 1, it is indicated that a tripping command does not occur, self-checking can be performed on an th joint J1, a second joint J2 and a tripping pressure plate, specific results are shown in table 1, wherein 1 in extraction indicates that a lamp in the optical coupling loop is on, 0 indicates that the lamp in the optical coupling loop is not on, and X indicates a no-state, and 1 in a control command indicates on, 0 indicates off, and X indicates a no-state.
TABLE 1 trip control loop monitoring results
The monitoring of the closing control loop comprises the following steps:
the control commands are that both the second junction J3 and the fourth junction J4 are open:
when signals of an OPT3 optical coupling loop and an OPT4 optical coupling loop are both 0, a HWJ optical coupling loop signal is 1, and a third joint J3 and a fourth joint J4 are output normally;
when the OPT3 optical coupling loop signal is 0, the OPT4 optical coupling loop signal is 1, the HWJ optical coupling loop signal is 1, and the output third joint J3 is abnormal;
when the OPT3 optical coupling loop signal is 1, the OPT4 optical coupling loop signal is 0, and the HWJ optical coupling loop signal is 1, outputting that the fourth joint J4 is abnormal;
when an OPT3 optical coupling loop signal is 1, an OPT4 optical coupling loop signal is 1, and a HWJ optical coupling loop signal is 1, outputting an OPT3 optical coupling loop and an OPT4 optical coupling loop abnormality;
the control commands are that the third joint J3 is open and the fourth joint J4 is closed:
when signals of an OPT3 optical coupling loop and an OPT4 optical coupling loop are both 0, and a HWJ optical coupling loop signal is 1, outputting a fourth joint J4 or abnormal closing pressure plate;
when the OPT3 optical coupling loop signal is 0, the OPT4 optical coupling loop signal is 1, the HWJ optical coupling loop signal is 1, and the output third joint J3 and the fourth joint J4 are abnormal;
when an OPT3 optical coupling loop signal is 1, an OPT4 optical coupling loop signal is 0, and a HWJ optical coupling loop signal is 1, outputting a fourth junction J4 normally;
when an OPT3 optical coupling loop signal is 1, an OPT4 optical coupling loop signal is 1, and a HWJ optical coupling loop signal is 1, outputting an OPT3 optical coupling loop and an OPT4 optical coupling loop abnormality;
the control commands are that the third joint J3 is closed and the fourth joint J4 is open:
when signals of the OPT3 optical coupling loop and the OPT4 optical coupling loop are both 0, and a HWJ optical coupling loop signal is 1, outputting that the third joint J3 is abnormal;
when the OPT3 optical coupling loop signal is 0, the OPT4 optical coupling loop signal is 1, the HWJ optical coupling loop signal is 1, and the output third joint J3 is normal;
when an OPT3 optical coupling loop signal is 1, an OPT4 optical coupling loop signal is 0, and a HWJ optical coupling loop signal is 1, outputting abnormity of a third joint J3 and a fourth joint J4;
when an OPT3 optical coupling loop signal is 1, an OPT4 optical coupling loop signal is 1, and a HWJ optical coupling loop signal is 1, outputting an OPT3 optical coupling loop and an OPT4 optical coupling loop abnormality;
the control commands are third joint J3, fourth joint J4 are both closed: the switching-on control loop is in a working state, and the output exits from a self-checking program;
when the HWJ optical coupling loop signal is 0, the output OPT3 optical coupling loop and the output OPT4 optical coupling loop are abnormal or the third joint J3 and the fourth joint J4 are abnormally closed.
In the above control process, when the HWJ optocoupler loop signal is 1, it indicates that a closing command does not occur, and self-checking can be performed on the third contact J3, the fourth contact J4 and the closing pressure plate, and the specific result is shown in table 2, where 1 in stoping indicates that a lamp in the optocoupler loop is on, 0 indicates that the lamp in the optocoupler loop is not on, and X indicates no state; a1 in the control command indicates closed, a 0 indicates open, and an X indicates no state.
TABLE 2 monitoring results of closing control loop
After an abnormal result is monitored, operation and maintenance personnel can be arranged to actively carry out maintenance, a large amount of work caused by periodic maintenance is avoided, the operation and maintenance efficiency is improved, and the operation and maintenance cost is reduced.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (16)
- The transformer substation breaker control loops comprise a tripping control loop and/or a closing control loop and are characterized in that the tripping control loop is connected between an operating power supply anode and an operating power supply cathode, the tripping control loop is used for controlling tripping of a transformer substation breaker, the tripping control loop is connected with a tripping monitoring loop in parallel, the tripping monitoring loop is used for monitoring the working state of a switch node in the tripping control loop, the closing control loop is connected between the operating power supply anode and the operating power supply cathode, the closing control loop is used for controlling closing of the transformer substation breaker, the closing control loop is connected with a closing monitoring loop in parallel, and the closing monitoring loop is used for monitoring the working state of the switch node in the closing control loop.
- 2. The substation breaker control circuit as claimed in claim 1, wherein the trip control circuit comprises a trip relay junction J1, a trip relay second junction J2, a junction J1 and a second junction J2 connected in series with a trip pressure plate, a trip hold coil TBJ, a breaker internal contact DL1 and the trip coil, a junction TBJA of the trip hold coil TBJ is connected in parallel between an operating power source positive electrode and a common point of the trip pressure plate and the trip hold coil TBJ, and the trip monitoring circuit comprises an OPT1 optical coupling circuit and an OPT2 optical coupling circuit, wherein the OPT1 optical coupling circuit is connected in parallel between the operating power source positive electrode and a common point of the junction J1 and the second junction J2, and the OPT2 optical coupling circuit is connected in parallel between a common point of the junction J1 and the second junction J2 and a common point of the trip pressure plate and the trip hold coil TBJ.
- 3. The kinds of substation breaker control circuit of claim 2, further comprising a TWJ optical coupler circuit connected in parallel between the positive pole of the operating power supply and the common point of the trip pressure plate and the trip hold coil TBJ.
- 4. The substation breaker control circuits according to claim 2 or 3, wherein when currents in the OPT1 optical coupling circuit and the OPT2 optical coupling circuit are larger than a threshold value, indicator lights in the OPT1 optical coupling circuit and the OPT2 optical coupling circuit are turned on, signals are set to be 1, when currents are smaller than the threshold value, the indicator lights in the OPT1 optical coupling circuit and the OPT2 optical coupling circuit are not turned on, signals are set to be 0, the threshold value is larger than currents of the OPT1 optical coupling circuit and the OPT2 optical coupling circuit in series connection, and the threshold value is smaller than the smaller value of two independent conduction currents of the OPT1 optical coupling circuit and the OPT2 optical coupling circuit.
- 5. The kinds of substation breaker control circuit of claim 3, wherein a TWJ optical coupling circuit is conductive, an indicator light in the TWJ optical coupling circuit is on, and a signal is set to 1, and is non-conductive, and an indicator light in the TWJ optical coupling circuit is not on, and a signal is set to 0.
- 6. The substation breaker control circuit according to claim 1, wherein the switching-on control circuit comprises a switching-on relay third joint J3 and a switching-on relay fourth joint J4 which are connected in series, the third joint J3 and the fourth joint J4 are connected in series with a switching-on pressing plate, a switching-on holding coil HBJ, a breaker internal contact DL2 and a switching-on coil, a joint HBJA of the switching-on holding coil HBJ is connected in parallel between an operating power supply positive electrode and a common point of the switching-on pressing plate and the switching-on holding coil HBJ, the switching-on monitoring circuit comprises an OPT3 optical coupling circuit and an OPT4 optical coupling circuit, the OPT3 optical coupling circuit is connected in parallel between the operating power supply positive electrode and a common point of the third joint J3 and the fourth joint J4, and the OPT4 optical coupling circuit is connected in parallel between the third joint J3, the fourth joint J4 common point of the switching-on pressing plate and the switching-on holding coil.
- 7. The transformer substation breaker control circuit of claim 6, further comprising a HWJ optocoupler circuit, wherein the HWJ optocoupler circuit is connected in parallel between the positive pole of the operating power supply and a common point of the closing pressure plate and the closing holding coil HBJ.
- 8. The substation breaker control circuits of claim 6 or 7, wherein when currents in the OPT3 optical coupling circuit and the OPT4 optical coupling circuit are larger than a threshold value, indicator lights in the OPT3 optical coupling circuit and the OPT4 optical coupling circuit are turned on, signals are set to be 1, when currents are smaller than the threshold value, the indicator lights in the OPT3 optical coupling circuit and the OPT4 optical coupling circuit are not turned on, signals are set to be 0, the threshold value is larger than currents of the OPT3 optical coupling circuit and the OPT4 optical coupling circuit in series connection, and the threshold value is smaller than the smaller value of two independent conduction currents of the OPT3 optical coupling circuit and the OPT4 optical coupling circuit.
- 9. The kinds of substation breaker control circuits of claim 6, wherein the HWJ opto-coupler circuit is conductive, the signal is set to 1 when an indicator lamp in the HWJ opto-coupler circuit is on, and the signal is set to 0 when the indicator lamp in the HWJ opto-coupler circuit is not on.
- 10, transformer substation circuit breaker control circuit monitoring method, including monitoring the control circuit of tripping operation and/or monitoring the control circuit of closing a floodgate, characterized by:controlling the on-off state of an on-off node in the trip control loop, and judging the working states of the on-off node and the optocoupler loop according to the on-off condition of an indicator light of the optocoupler loop;and controlling the on-off state of an on-off node in the switching-on control circuit, and judging the working states of the on-off node and the optical coupling circuit according to the on-off condition of an indicator lamp of the optical coupling circuit.
- 11. The method for monitoring the control loop of the substation breaker according to claim 10, wherein a control command is that both a connection point J1 and a second connection point J2 are disconnected, when signals of an OPT1 optical coupling loop and an OPT2 optical coupling loop are both 0, a connection point J1 and a second connection point J2 are output normally, when a signal of an OPT1 optical coupling loop is 0, a signal of an OPT2 optical coupling loop is 1, a connection point J1 is output abnormally, when a signal of an OPT1 optical coupling loop is 1, a signal of an OPT2 optical coupling loop is 0, a second connection point J2 is output abnormally, and when a signal of an OPT1 optical coupling loop is 1, a signal of an OPT2 optical coupling loop is 1, an OPT1 optical coupling loop and an OPT2 optical coupling loop are output abnormally;when the OPT1 opto-coupler loop signal is 0, the OPT2 opto-coupler loop signal is 1, the junction J1 and the second junction J2 are abnormal, when the OPT1 opto-coupler loop signal is 1, the OPT2 opto-coupler loop signal is 0, the second junction J2 is normal, when the OPT1 opto-coupler loop signal is 1, the OPT2 opto-coupler loop signal is 1, the OPT1 opto-coupler loop and the OPT2 opto-coupler loop are abnormal;the control command is that an -th contact J1 is closed, a second contact J2 is open, when signals of an OPT1 optical coupling loop and an OPT2 optical coupling loop are both 0, a -th contact J1 is output abnormally, when a signal of an OPT1 optical coupling loop is 0, a signal of an OPT2 optical coupling loop is 1, a -th contact J1 is output normally, when a signal of an OPT1 optical coupling loop is 1, a signal of an OPT2 optical coupling loop is 0, a -th contact J1 and a second contact J2 are output abnormally, and when a signal of an OPT1 optical coupling loop is 1, a signal of an OPT2 optical coupling loop is 1, an OPT1 optical coupling loop and an OPT2 optical coupling loop are output abnormally.
- 12. The transformer substation breaker control loop monitoring method according to claim 10, wherein when a TWJ optical coupling loop signal is 0, an OPT1 optical coupling loop and an OPT2 optical coupling loop are output to be abnormal or a junction J1 and a second junction J2 are output to be abnormal closed, and when the TWJ optical coupling loop signal is 1, a self-checking program can be output.
- 13. The substation breaker control loop monitoring method of claim 11 or 12, wherein the control command is J1, the second J2 is closed, the trip control loop is in working condition, and the output exits the self-test procedure.
- 14. The method for monitoring the control loop of the substation breaker according to claim 10, wherein a control command is that the second joint J3 and the fourth joint J4 are both disconnected, when signals of an OPT3 optical coupling loop and an OPT4 optical coupling loop are both 0, the third joint J3 and the fourth joint J4 are output normally, when a signal of an OPT3 optical coupling loop is 0, a signal of an OPT4 optical coupling loop is 1, the third joint J3 is output abnormally, when a signal of an OPT3 optical coupling loop is 1, a signal of an OPT4 optical coupling loop is 0, the fourth joint J4 is output abnormally, and when a signal of an OPT3 optical coupling loop is 1, a signal of an OPT4 optical coupling loop is 1, the OPT3 optical coupling loop and the OPT4 optical coupling loop are output abnormally;the control commands are that the third joint J3 is open and the fourth joint J4 is closed: when signals of an OPT3 optical coupling loop and an OPT4 optical coupling loop are both 0, outputting a fourth joint J4 or abnormal closing pressure plate; when the OPT3 optical coupling loop signal is 0 and the OPT4 optical coupling loop signal is 1, outputting abnormity of a third joint J3 and a fourth joint J4; when the OPT3 optical coupling loop signal is 1 and the OPT4 optical coupling loop signal is 0, outputting a fourth junction J4 to be normal; when an OPT3 optical coupling loop signal is 1 and an OPT4 optical coupling loop signal is 1, outputting an OPT3 optical coupling loop and an OPT4 optical coupling loop abnormality;the control commands are that the third joint J3 is closed and the fourth joint J4 is open: when signals of the OPT3 optical coupling loop and the OPT4 optical coupling loop are both 0, outputting that a third joint J3 is abnormal; when the OPT3 optical coupling loop signal is 0, the OPT4 optical coupling loop signal is 1, and the output third joint J3 is normal; when the OPT3 optical coupling loop signal is 1 and the OPT4 optical coupling loop signal is 0, outputting the abnormality of a third joint J3 and a fourth joint J4; when an OPT3 optical coupling loop signal is 1 and an OPT4 optical coupling loop signal is 1, an OPT3 optical coupling loop and an OPT4 optical coupling loop are output to be abnormal.
- 15. The substation breaker control circuit monitoring method according to claim 10, wherein when a HWJ optocoupler circuit signal is 0, an OPT3 optocoupler circuit and an OPT4 optocoupler circuit are output to be abnormal or a third joint J3 and a fourth joint J4 are output to be abnormal and when an HWJ optocoupler circuit signal is 1, a self-test program can be output.
- 16. The substation breaker control loop monitoring method of claim 14 or 15, wherein the control command is a third contact J3, the fourth contact J4 is closed, the closing control loop is in working condition, and the output exits from the self-test procedure.
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| CN116840740A (en) * | 2023-08-25 | 2023-10-03 | 珠海菲森电力科技有限公司 | Control loop detection circuit and method and electronic equipment |
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