CN214900179U - Tripping circuit and control system of safety and stability control device of power system - Google Patents
Tripping circuit and control system of safety and stability control device of power system Download PDFInfo
- Publication number
- CN214900179U CN214900179U CN202121331116.5U CN202121331116U CN214900179U CN 214900179 U CN214900179 U CN 214900179U CN 202121331116 U CN202121331116 U CN 202121331116U CN 214900179 U CN214900179 U CN 214900179U
- Authority
- CN
- China
- Prior art keywords
- test
- safety
- normally open
- trip
- tripping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 claims abstract description 103
- 230000002159 abnormal effect Effects 0.000 claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims description 16
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000005856 abnormality Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000013522 software testing Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model belongs to the automatic field of electric power system, concretely relates to safety and stability controlling means's tripping circuit and control system, tripping circuit includes tripping operation execution loop and test execution loop, and control power supply positive pole, normally closed contact CJ2, normally open contact TJ1, normally closed contact CJ1, circuit breaker mechanism and control power supply negative pole concatenate in proper order and form tripping operation execution loop, and tripping operation execution loop still connects abnormal indicator lamp D2, abnormal indicator lamp D3 in parallel, abnormal indicator lamp D2, abnormal indicator lamp D3 concatenate a diode respectively; the positive pole of the test power supply, the test lamp D1, the normally open contact CJ3, the normally open contact TJ1, the normally open contact CJ4 and the negative pole of the test power supply are connected in series in sequence to form a test execution loop. The utility model discloses trip circuit need not to have a power failure and just can realize automated inspection, also need not to do secondary safety measure again at relevant transformer substation, very big improvement efficiency of software testing, ensured the safety of big electric wire netting.
Description
Technical Field
The utility model belongs to electric power system automation, concretely relates to electric power system safety and stability control device's tripping circuit and control system.
Background
The safety and stability control device of the electric power system and the system formed by the safety and stability control device belong to a 'second defense line' for protecting the safety of the electric power network, the reliability of the safety and stability control device directly affects the safety of the whole electric power network and the electric power system, but the safety and stability control device generally does not play a role independently, but the safety and stability control system is formed by the safety and stability control devices of different transformer substations, when the safety and stability control device needs to act, a safety and stability control host issues a command to the safety and stability control devices of different transformer substations to carry out a load cutting or load cutting operation, so that under normal conditions, when the safety and stability control device needs to be checked, the safety and stability control device faces difficulty and is mainly represented as: when the safety and stability control device is detected, the action of the safety and stability control device needs to be simulated, but the action trip command corresponds to a plurality of substations, and in practice, all the substations related to the safety and stability control device cannot be powered off to finish detection in order to ensure the power supply reliability of a power grid. Therefore, the inspection personnel are required to do a large number of secondary system safety measures at the related transformer substations to detect, and the detection process requires the cooperation of the working personnel at different transformer substations, so that the difficulty is high, and certain safety risks exist.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned defects, an object of the present invention is to provide a trip circuit and a control system of a safety and stability control device for an electric power system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a trip circuit of a safety and stability control device of an electric power system comprises a control power supply, a test power supply, a normally closed contact CJ1, a normally closed contact CJ2, a normally open contact TJ1, a circuit breaker mechanism, a test lamp D1, a normally open contact CJ3 and a normally open contact CJ 4;
the tripping device comprises a control power supply, a normally closed contact CJ2, a normally open contact TJ1, a normally closed contact CJ1, a breaker mechanism and a control power supply cathode which are sequentially connected in series to form a tripping execution loop, an abnormal indicator lamp D2 and an abnormal indicator lamp D3 are further connected in parallel in the tripping execution loop, and the abnormal indicator lamp D2 and the abnormal indicator lamp D3 are respectively connected in series with a diode;
the positive pole of the test power supply, the test lamp D1, the normally open contact CJ3, the normally open contact TJ1, the normally open contact CJ4 and the negative pole of the test power supply are connected in series in sequence to form a test execution loop.
Preferably, the abnormality indicator lamp D2 is connected in parallel with the normally closed contact CJ2, and the abnormality indicator lamp D3 is connected in parallel with the normally closed contact CJ 1.
Preferably, the circuit breaker mechanism comprises a trip coil TQ.
Preferably, the test power supply voltage is lower than the control power supply voltage, the test lamp D1 may be lit, and the abnormality indicator lamps D2, D3 may not be lit.
Preferably, the trip circuit further comprises a trip circuit monitoring mechanism.
Preferably, the tripping circuit further comprises a command control circuit, the command control circuit comprises a normally open contact ZT, a tripping relay TJ, a normally open contact CS, a testing relay CJ, a delay relay YSJ and a delay relay contact YSJ1, and the normally open contact ZT and the tripping relay TJ are connected in series and used for sending a real tripping command; the normally open contact CS, the test relay CJ and the delay relay YSJ are connected in series, and the delay relay contact YSJ1 is connected with the trip relay TJ in series and connected with the test relay CJ and the delay relay YSJ in parallel and used for sending a test command.
A control system of a safety and stability control device of an electric power system comprises a host machine and an execution machine which are arranged in a related transformer substation, wherein the host machine sends out a real tripping command and a test command, and when the execution machine receives the real tripping command, the tripping operation or the load shedding operation is carried out on a tripping loop; when the executive machine receives the test command, the tripping loop is tested but not switched off or the load is switched off, and the test result is fed back to the host machine through the communication channel.
Preferably, the execution machine is provided with an alarm mechanism, and when the tripping loop has abnormal conditions, the alarm mechanism sends out an alarm signal and feeds the alarm signal back to the host machine through a communication channel.
A control method of a safety and stability control device of an electric power system comprises the following steps:
s1, when a safety and stability event occurs in the power grid, the host computer sends a real tripping command, ZT is closed, the tripping relay TJ is electrified, a normally open contact TJ1 is closed, a tripping execution loop forms a complete path, and a tripping coil in a breaker mechanism trips a breaker;
s2, when the safety and stability control device needs to be tested, the host computer sends a test command, CS is closed, the test relay CJ and the time delay relay YSJ are electrified, if the tripping circuit abnormal indicator lamps D2 and D3 are on, the situation that the joint of CJ1 and CJ2 is abnormal is shown, the test is stopped, the execution machine sends an abnormal alarm signal, and the abnormal situation is fed back to the host computer through a communication channel;
under the condition of no abnormal condition, after the time delay relay contact YSJ1 is delayed and closed, the tripping relay TJ is electrified, the normally open contact TJ1 is closed, the test execution loop forms a complete access, the test lamp D1 is lightened, the test is completed, and the test result is fed back to the host through the communication channel.
Preferably, the testing step of step S2 is as follows:
(1) in the initial state, normally open contacts TJ1, CJ3 and CJ4 are in an open state, normally closed contacts CJ1 and CJ2 are in a closed state, and abnormal indicator lamps D2 and D3 are in a lighting state but do not give an alarm;
(2) the executive machine receives a test command sent by the host machine, CS is closed, so that a test relay CJ and a delay relay YSJ are electrified, normally closed contacts CJ1 and CJ2 are disconnected, normally open contacts CJ3 and CJ4 are closed, and the normally open contact TJ1, an abnormal indicator lamp D2 and an abnormal indicator lamp D3 are isolated from a tripping loop;
(3) the contact YSJ1 of the delay relay is closed after a certain time delay, during the time delay, the safety and stability control device automatically judges whether the abnormal indicator lamps D2 and D3 are in an illuminated state, if so, the abnormal indicator lamps D2 and D3 indicate that the CJ1 and CJ2 contacts are abnormal, the test is stopped, an abnormal alarm signal is sent out, the abnormal condition is fed back to a host through a communication channel, and the test is carried out after the reason is found out and the defect is eliminated; if no abnormity exists, the test is continued, and a contact YSJ1 of the delay relay is closed after the delay time of the delay relay YSJ is up;
(4) after a contact YSJ1 of the time delay relay is closed, a trip relay TJ is electrified, a normally open contact TJ1 is closed, a test execution loop is connected from the positive pole of a test power supply to the negative pole of the test power supply through a test lamp D1, a normally open contact CJ3, a normally open contact TJ1 and a normally open contact CJ4, a complete path is formed, a test lamp D1 is lightened, and the test is completed;
(5) after the test is finished, the test result is fed back to the host through the communication channel, after all the test results of the circuit breakers are fed back, the host stops the test command, and all the relays and the contacts are restored to the initial state.
The utility model discloses an actively beneficial effect:
1. the utility model discloses CJ1 has been increased in original tripping operation return circuit, two normally closed contacts of CJ2, and CJ3 has parallelly connected, two normally open contacts of CJ4 are connected with the test power supply, what detect is tripping operation return circuit and tripping relay in the actual motion, need not to have a power failure and just can realize automated inspection, also need not to do secondary safety measure at relevant transformer substation again, very big improvement efficiency of software testing, can verify safety and stability control system's reliability through detecting, the safety of big electric wire netting has been ensured, not only be applicable to safety and stability control device and also be applicable to other protection device and relevant conventional transformer substation's control box and intelligent substation's intelligent terminal.
2. The utility model discloses increase test relay CJ, delay relay YSJ and delay relay contact YSJ1 in the order return circuit, in the delay period of delay relay, whether there is the state of lighting according to unusual pilot lamp D2, D3 and judge whether there is an anomaly in tripping circuit, can in time the automatic shutdown test and send out the warning when tripping circuit is unusual, avoid taking place the mistake and cut the load.
3. The utility model discloses set up two orders in electric power system safety and stability control device tripping operation circuit's detecting system, real order is used for cutter or load shedding operation under the normal operating mode, and test order is used for the test to tripping operation circuit under the test condition, and test order can detect the verification to tripping operation circuit moreover, can not lead to real cutter or load shedding operation again, can realize the automated inspection under the primary equipment uninterrupted power supply state.
4. The utility model discloses set up safety and stability control device host computer and executor at relevant transformer substation, there is communication between transformer substation safety and stability control device host computer and the safety and stability control device executor, the test result accessible communication channel automatic feedback of each safety and stability control device executor gives the host computer, has realized that the staff is in the detection of a place to each transformer substation, very big improvement efficiency of software testing, avoided the safe risk that the maloperation brought simultaneously, detect accurate safety.
Drawings
Fig. 1 is a schematic structural diagram of a trip circuit of the safety and stability control device of the power system of the present invention;
fig. 2 is a schematic structural diagram of the control system of the present invention.
Detailed Description
The invention will be further described with reference to some specific embodiments.
Example 1
Referring to fig. 1, a trip circuit of a safety and stability control device of an electric power system includes a control power supply, a test power supply, a normally closed contact CJ1, a normally closed contact CJ2, a normally open contact TJ1, a circuit breaker mechanism, a test lamp D1, a normally open contact CJ3, and a normally open contact CJ 4; the circuit breaker mechanism includes a trip coil TQ, which is indicated by a dotted line in fig. 1 and connected in series with other contacts and components, but omitted in the schematic diagram, and a trip circuit monitoring mechanism, which is disposed outside the safety and stability control device, for monitoring the integrity of the trip circuit outside the safety and stability control device, which belongs to the prior art and will not be described in detail.
The tripping device comprises a control power supply, a normally closed contact CJ2, a normally open contact TJ1, a normally closed contact CJ1, a breaker mechanism and a control power supply cathode which are sequentially connected in series to form a tripping execution loop, an abnormal indicator lamp D2 and an abnormal indicator lamp D3 are further connected in parallel in the tripping execution loop, and the abnormal indicator lamp D2 and the abnormal indicator lamp D3 are respectively connected in series with a diode; the abnormal indicator lamp D2 is connected in parallel with the normally closed contact CJ2, and the abnormal indicator lamp D3 is connected in parallel with the normally closed contact CJ 1; the control power supply is a +/-110V power supply.
In addition, the abnormal indicator lamps D2 and D3 belong to specially-made large-resistance lamps, the positive pole of the control power supply enters the ground through D2, then the ground passes through D3, and the trip coil TQ returns to the negative pole, so that the formed path current is relatively small and is insufficient to drive TQ action.
The positive electrode of the test power supply, the test lamp D1, the normally open contact CJ3, the normally open contact TJ1, the normally open contact CJ4 and the negative electrode of the test power supply are sequentially connected in series to form a test execution loop; the testing power supply of the embodiment selects a +/-24V power supply, can also select a +/-48V low-voltage power supply and has lower voltage grade, the CJ1 contact is prevented from being damaged, the negative electrode of the power supply is controlled to be conducted with the positive electrode of the testing power supply, and the power of the power supply cannot cause the action of the trip coil TQ to cause error tripping.
The tripping circuit also comprises a command control circuit, the command control circuit comprises a normally open contact ZT, a tripping relay TJ, a normally open contact CS, a testing relay CJ, a time delay relay YSJ and a time delay relay contact YSJ1, the normally open contact ZT and the tripping relay TJ are connected in series and are connected in parallel at two ends of a control power supply, and a power supply can be additionally arranged and used for sending a real tripping command; the normally open contact CS, the test relay CJ and the delay relay YSJ are connected in series, the delay relay contact YSJ1 is connected with the trip relay TJ in series, connected with the test relay CJ and the delay relay YSJ in parallel and connected to two ends of the control power supply in parallel, and a power supply can be additionally arranged for sending a test command.
Referring to fig. 2, a control system of a safety and stability control device of an electrical power system includes a host and an actuator, which are arranged in a related substation, wherein the host sends a real trip command and a test command, and when the actuator receives the real trip command, the actuator performs a tripping operation or a load shedding operation on a trip circuit; when the executive machine receives the test command, the tripping loop is tested but not switched off or the load is switched off, and the test result is fed back to the host machine through the communication channel.
And the executing machine is provided with an alarm mechanism, and when the tripping loop has abnormal conditions, the alarm mechanism sends out an alarm signal and feeds back the alarm signal to the host machine through the communication channel.
Of course, the main machine can have the function of an actuator according to actual requirements, and the actuator can comprise a plurality of tripping loops for controlling a plurality of breaker mechanisms; a transformer substation can also have safety and stability control device host computer and executor simultaneously, also can have a plurality of submachine of jurisdiction under the host computer, and the condition of a plurality of executors of jurisdiction under the submachine all belongs to the utility model discloses the equivalence of detecting system structure changes, all should cover within the protection scope.
A control method of a safety and stability control device of an electric power system comprises the following steps:
s1, when a safety and stability event occurs in a power grid and the safety and stability control device needs to act, a real tripping command is sent, ZT is closed, a tripping relay TJ is electrified, a normally open contact TJ1 of the tripping relay is closed, the positive pole of a power supply is controlled, a normally closed contact CJ2, a normally open contact TJ1, a normally closed contact CJ1 and a tripping coil TQ are connected to the negative pole of the control power supply to form a complete path, and the tripping coil in a circuit breaker mechanism trips off the circuit breaker;
s2, when the safety and stability control device needs to be tested, the host computer sends a test command, CS is closed, the test relay CJ and the time delay relay YSJ are electrified, if the tripping circuit abnormal indicator lamps D2 and D3 are on, the situation that the joint of CJ1 and CJ2 is abnormal is shown, the test is stopped, the alarm mechanism sends an abnormal alarm signal, and the abnormal situation is fed back to the host computer through the communication channel;
under the condition of no abnormal condition, after the time delay relay contact YSJ1 is delayed and closed, the tripping relay TJ is electrified, the normally open contact TJ1 is closed, the test execution loop forms a complete access, the test lamp D1 is lightened, the test is completed, and the test result is fed back to the host through the communication channel.
The test procedure described in step S2 is detailed below:
(1) in the initial state, normally open contacts TJ1, CJ3 and CJ4 are in an open state, normally closed contacts CJ1 and CJ2 are in a closed state, and abnormal indicator lamps D2 and D3 are in a lighting state but do not give an alarm;
(2) the safety and stability control device actuator receives a test command sent by the host computer, CS is closed, so that a test relay CJ and a delay relay YSJ are electrified, normally closed contacts CJ1 and CJ2 are opened, normally open contacts CJ3 and CJ4 are closed, a normally open contact TJ1, an abnormal indicator lamp D2 and an abnormal indicator lamp D3 are isolated from a tripping loop, monitoring of the tripping loop is not affected, and the abnormal indicator lamps D2 and D3 are extinguished due to isolation of diodes;
(3) the contact YSJ1 of the delay relay is closed after a certain time delay, during the time delay, the safety and stability control device automatically judges whether the abnormal indicator lamps D2 and D3 are in an illuminated state, if so, the abnormal indicator lamps D2 and D3 indicate that the CJ1 and CJ2 contacts are abnormal, the test is stopped, an abnormal alarm signal is sent out, the abnormal condition is fed back to a host through a communication channel, and the test is carried out after the reason is found out and the defect is eliminated; if no abnormity exists, the test is continued, and a contact YSJ1 of the delay relay is closed after the delay time of the delay relay YSJ is up;
(4) after a contact YSJ1 of the time delay relay is closed, a trip relay TJ is electrified, a normally open contact TJ1 is closed, a test execution loop is connected from the positive pole of a test power supply to the negative pole of the test power supply through a test lamp D1, a normally open contact CJ3, a normally open contact TJ1 and a normally open contact CJ4, a complete path is formed, a test lamp D1 is lightened, and the test is completed;
(5) after the test is finished, the test result is fed back to the host through the communication channel, after all the test results of the circuit breakers are fed back, the host stops the test command, and all the relays and the contacts are restored to the initial state.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. A trip circuit of a safety and stability control device of an electric power system is characterized by comprising a control power supply, a test power supply, a normally closed contact CJ1, a normally closed contact CJ2, a normally open contact TJ1, a circuit breaker mechanism, a test lamp D1, a normally open contact CJ3 and a normally open contact CJ 4;
the tripping device comprises a control power supply, a normally closed contact CJ2, a normally open contact TJ1, a normally closed contact CJ1, a breaker mechanism and a control power supply cathode which are sequentially connected in series to form a tripping execution loop, an abnormal indicator lamp D2 and an abnormal indicator lamp D3 are further connected in parallel in the tripping execution loop, and the abnormal indicator lamp D2 and the abnormal indicator lamp D3 are respectively connected in series with a diode;
the positive pole of the test power supply, the test lamp D1, the normally open contact CJ3, the normally open contact TJ1, the normally open contact CJ4 and the negative pole of the test power supply are connected in series in sequence to form a test execution loop.
2. The trip circuit of the safety and stability control apparatus of electric power system as claimed in claim 1, wherein the abnormal lamp D2 is connected in parallel with the normally closed contact CJ2, and the abnormal lamp D3 is connected in parallel with the normally closed contact CJ 1.
3. The trip circuit of a power system safety and stability control device of claim 1, wherein the circuit breaker mechanism comprises a trip coil TQ.
4. The trip circuit of the safety and stability control device of electric power system as claimed in claim 1, wherein the test power voltage is lower than the control power voltage, the test lamp D1 can be lighted, and the abnormality indicator lamps D2 and D3 cannot be lighted.
5. The trip circuit of the power system safety and stability control device of claim 1, wherein the trip circuit further comprises a trip circuit monitoring mechanism.
6. The trip circuit of the electric power system safety and stability control device according to any one of claims 1 to 5, wherein the trip circuit further comprises a command control circuit, the command control circuit comprises a normally open junction ZT, a trip relay TJ, a normally open junction CS, a test relay CJ, a delay relay YSJ and a delay relay junction YSJ1, the normally open junction ZT and the trip relay TJ are connected in series for issuing a real trip command; the normally open contact CS, the test relay CJ and the delay relay YSJ are connected in series, and the delay relay contact YSJ1 is connected with the trip relay TJ in series and connected with the test relay CJ and the delay relay YSJ in parallel and used for sending a test command.
7. A control system of a safety and stability control device of an electric power system, which comprises a trip loop of the safety and stability control device of the electric power system as claimed in any one of claims 1 to 6, and is characterized by comprising a host computer and an execution machine, wherein the host computer sends out real trip commands and test commands, and when the execution machine receives the real trip commands, the trip loop is subjected to a tripping operation or a load shedding operation; when the executive machine receives the test command, the tripping loop is tested but not switched off or the load is switched off, and the test result is fed back to the host machine through the communication channel.
8. The control system of the safety and stability control device of the power system as claimed in claim 7, wherein an alarm mechanism is further disposed on the actuator, and when the trip circuit has an abnormal condition, the alarm mechanism sends an alarm signal and feeds the alarm signal back to the host computer through the communication channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121331116.5U CN214900179U (en) | 2021-06-16 | 2021-06-16 | Tripping circuit and control system of safety and stability control device of power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121331116.5U CN214900179U (en) | 2021-06-16 | 2021-06-16 | Tripping circuit and control system of safety and stability control device of power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214900179U true CN214900179U (en) | 2021-11-26 |
Family
ID=78904959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121331116.5U Active CN214900179U (en) | 2021-06-16 | 2021-06-16 | Tripping circuit and control system of safety and stability control device of power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214900179U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113300342A (en) * | 2021-06-16 | 2021-08-24 | 国网河南省电力公司电力科学研究院 | Tripping loop of safety and stability control device of power system, detection system and method |
-
2021
- 2021-06-16 CN CN202121331116.5U patent/CN214900179U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113300342A (en) * | 2021-06-16 | 2021-08-24 | 国网河南省电力公司电力科学研究院 | Tripping loop of safety and stability control device of power system, detection system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110346717A (en) | A kind of artificial intelligence high-voltage circuitbreaker on-line monitoring system and method | |
| CN110941918A (en) | Intelligent substation fault analysis system | |
| CN102694369A (en) | Method for preventing low-voltage protection misoperation of motor caused by PT disconnection | |
| CN110297161B (en) | Method for preventing power grid equipment from transmitting power with connection point and scheduling system | |
| CN103683491A (en) | Multi-power accessed substation anti-islanding system | |
| CN214900179U (en) | Tripping circuit and control system of safety and stability control device of power system | |
| CN107069966A (en) | A kind of transformer station's remote online monitoring and status assessing system | |
| CN112421615A (en) | Power distribution station self-healing control method and system based on intelligent breaker action | |
| CN108631439A (en) | Breaker remote breaking-closing operating trouble shoot method | |
| CN104749461B (en) | One kind is once pressurizeed through-flow device, intelligent transformer substation system and its control method | |
| KR101826134B1 (en) | Power Receiving and Distribution Equipment with diagnosing and repairng fault | |
| CN106202729A (en) | A kind of transient characterisitics evaluation methodology of refining and petrochemical processing units electric power system | |
| CN115076081A (en) | Fire pump control system with mechanical emergency starting and power frequency inspection functions | |
| CN110739179A (en) | transformer substation circuit breaker control loop and monitoring method thereof | |
| CN113300342A (en) | Tripping loop of safety and stability control device of power system, detection system and method | |
| CN204885910U (en) | Intelligent low tension distribution box | |
| CN102520303A (en) | Detector and detection method for alternating-current loops of wind generation set | |
| CN212649093U (en) | Device for preventing secondary circuit of current transformer from being opened | |
| CN104597899A (en) | Technical performance test platform of distribution automation device | |
| CN114441896A (en) | Distribution network automation simulation platform and FTU detection method | |
| CN114498914A (en) | Intelligent substation synthesizes monitored control system | |
| CN113471939A (en) | Interlocking loop fault monitoring and alarming method in disconnecting link control loop | |
| CN204595112U (en) | One is once pressurizeed through-flow device and intelligent transformer substation system | |
| CN112798970A (en) | Remote capacity checking system for storage battery of transformer substation | |
| CN219576692U (en) | Electric power system and emergency control power supply device thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |