CN112366811A - Power supply switching device and method for automatically detecting running state of generator - Google Patents
Power supply switching device and method for automatically detecting running state of generator Download PDFInfo
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- CN112366811A CN112366811A CN202011220485.7A CN202011220485A CN112366811A CN 112366811 A CN112366811 A CN 112366811A CN 202011220485 A CN202011220485 A CN 202011220485A CN 112366811 A CN112366811 A CN 112366811A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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Abstract
The invention relates to the technical field of safety automation of an electric power system, in particular to a power supply switching device and a power supply switching method for automatically detecting the running state of a generator, aiming at providing the power supply switching device and the power supply switching method for automatically detecting the running state of the generator and solving the problem that a fixed switching control strategy of a conventional switching device cannot meet various working conditions; the power supply switching device comprises a working bus, a first power supply, a second power supply, a generator and a power supply switching device, wherein the first power supply, the second power supply and the generator are connected with the working bus through a loop; install first circuit breaker on the return circuit between first power and the work bus, install the second circuit breaker on the return circuit between second power and the work bus, install the third circuit breaker on the return circuit between generator and the work bus.
Description
Technical Field
The invention relates to the technical field of safety automation of electric power systems, in particular to a power supply switching device and method for automatically detecting the running state of a generator.
Background
In order to improve the reliability of power supply, the working bus is generally designed to be supplied with power by a plurality of lines, and an automatic power switching device is configured to realize the continuous control during abnormal power supply. The uninterrupted power supply is ensured to depend on each link of power production and transmission, and the automatic switching of the standby power supply is an important technical measure.
The important premise for improving the power supply reliability is that at least two power supply sources are needed firstly, and then before the power supply interruption caused by the fault or abnormality of the working power supply, a standby power supply is needed to be put into the power supply system quickly and under the premise of not damaging power supply and power utilization equipment, so that the uninterrupted power supply for power users is guaranteed, most and even all loads are not cut off, and the power supply system is quickly powered on to continue operation.
The power supply switching under the normal condition is that the voltage of a default bus is only supplied with power from an external line, and once the power supply is influenced by the line fault, the switching device automatically switches according to a switching strategy preset by a program. However, in some power supply systems of factories, mines and chemical enterprises, the working buses in the systems are designed with generators which are operated by themselves due to consideration of the problems of power consumption cost, capacity and the like. Because the closing condition of the bus operated by the generator when the bus is put into the standby power supply is stricter than the conventional condition, the influence of the operating state of the generator on the switching control process and the switching control result needs to be considered in the bus voltage switching control under the working conditions.
In the prior art, a conventional fast switching device is a two-power switching device designed for one working power supply and one standby power supply on a single-section bus, and the fast switching device is not suitable for buses with a plurality of self-contained power supplies on a single-section bus partially provided with a self-contained generating set. The inapplicability is mainly shown in: 1. the bus voltage and the working incoming line current are collected by the quick switching device when the upper stage of the incoming line of the working power supply is powered off, and the bus voltage can still be maintained by the self-contained unit after the main power supply is not powered on (but the self-contained unit loses the main power supply and clamps the bus to operate unstably) when the self-contained unit is arranged on the bus, so that the quick switching cannot be started. 2. If a bus with balanced electricity is used, the main power supply does not power on or power off when running, the no-current condition is automatically met, and when the voltage acquisition of the conventional fast switching device is abnormal, the fast switching analog quantity is started, so that the fast switching false action is caused. 3. When the conventional fast switching is used for a bus with a self-contained power supply, in order to ensure the safety influence of the switching power supply on the generator, whether the generator is designed to be jointly switched or not and then the standby power supply is combined, the logic can cause the generation loss, and the sudden drop of the bus voltage caused by the cutting of the generator can cause the 'electricity dazzling' of a system when the standby power supply is switched.
Therefore, the running state of the generator needs to be detected in real time through the power switching device, a preset switching control strategy is automatically selected according to a state detection result during power switching control, optimal control and flexible application of a switching process are achieved, and the influence of the power switching process on the generator and a bus load is reduced.
Disclosure of Invention
The invention mainly aims to provide a power supply switching device and a power supply switching method for automatically detecting the running state of a generator, and solves the problem that a fixed switching control strategy of a conventional switching device cannot meet the flexible application requirement of the switching device under various working conditions.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides an automatic detect power auto-change over device of generator running state, includes work bus 1, first power 2, second power 3, generator 14 and power auto-change over device 6 which characterized in that: the first power supply 2, the second power supply 3 and the generator 14 are connected with the working bus 1 through loops, and any one loop of the first power supply 2 and the second power supply 3 supplies power to the working bus 1; a first circuit breaker 4 is arranged on a loop between the first power supply 2 and the working bus 1, a second circuit breaker 5 is arranged on a loop between the second power supply 3 and the working bus 1, and a third circuit breaker 15 is arranged on a loop between the generator 14 and the working bus 1; the state loops of the first breaker 4, the second breaker 5 and the third breaker 15 are connected to the input end of the power switching device 6; the output end of the power switching device 6 is connected with an operation loop of a first circuit breaker 4 and a second circuit breaker 5; the input end of the power supply switching device 6 is connected with a first voltage signal 11, a first power supply voltage signal 12 and a third voltage signal 13, and the power supply switching device 6 collects the voltage signals of the working bus 1, the first power supply 2 and the second power supply 3.
The POWER supply switching device 6 is composed of a plurality of plug-ins with independent functions, and mainly comprises an HMI plug-in, an AD plug-in, a DO plug-in, a DI plug-in, a POWER plug-in and a CPU plug-in.
The HMI plug-in is a human-computer operation interface plug-in, mainly is a window of human-computer conversation, and comprises panel keys, liquid crystal and indicator light display; the AD plug-in is an analog quantity acquisition plug-in, and mainly acquires voltage signals of a bus and each incoming line, and the signals are generally output after being converted by voltage transformers of different grades; the DO plug-in is a command and signal output plug-in, is mainly used for outputting a breaker switching-on and switching-off control command to the outside by the device, and also comprises alarm signals such as voltage abnormity, working abnormity and the like; the DI plug-in is a signal acquisition plug-in and mainly comprises a circuit and generator circuit breaker opening and closing position state and also comprises a starting state, a locking state or other condition opening and closing state provided by the outside; the POWER plug-in is a POWER supply module, is connected with an externally provided working POWER supply and is converted into POWER supplies of various levels required by the interior of the device; the CPU plug-in is the control core of the power switching device, completes the acquisition of the input data of the AD plug-in and the DI plug-in, monitors the conditions of bus voltage and incoming line voltage, saves the state results of circuits and generator circuit breakers acquired by the DI plug-in, also saves various switching control strategies preset by programs and corresponding implementation conditions, and automatically selects the power switching control strategy according to the saved state results of the generator circuit breakers when the power switching conditions are met.
The first on-position state 7 of the first circuit breaker 4, the second on-position state 8 of the second circuit breaker 5 and the third on-position state 16 of the third circuit breaker 15 are connected into a DI plug-in unit of the power supply switching device 6 through hard wiring; a first switching-on command 9 of the first circuit breaker 4 and a second switching-off command 10 of the second circuit breaker 5 are connected into a DO plug-in unit of the power switching device 6 through hard wiring; a first voltage signal 11 of the working bus 1, a second voltage signal 12 of the first power supply 2 and a third voltage signal 13 of the second power supply 3 are all connected to the AD plug-in unit of the power supply switching device 6 through hard wiring; the power supply switching device 6 monitors a first voltage signal 11 of the working bus 1, a second voltage signal 12 of the first power supply 2, a third voltage signal 13 of the second power supply 3, a first closing state 7 of the first circuit breaker 4, a second closing state 8 of the second circuit breaker 5 and a third closing state 16 of the third circuit breaker 15 in real time.
A power supply switching method for automatically detecting the running state of a generator comprises the following steps:
step 1: under the condition of normal power supply, the first power supply 2 supplies power to the working bus 1, a first closed state 7 of the first circuit breaker 4 is closed, a second closed state 8 of the second circuit breaker 5 is separated, and the second power supply 3 serves as a standby power supply;
step 2: the power supply switching device 6 automatically starts power supply switching control when monitoring that the first voltage signal 11 of the working bus 1 is abnormal;
and step 3: when the power supply switching device 6 starts the automatic power supply switching, monitoring whether a third voltage signal 13 of the second power supply 3 is normal; after monitoring that the third voltage signal 13 of the second power supply 3 is normal, controlling a first switching-on/off command 9 of the first circuit breaker 4 to switch off the first circuit breaker 4; according to the detection result of the third on-position state 16 of the third breaker 15 stored by the CPU plug-in, automatically selecting a corresponding switching control strategy to detect the closing condition;
and 4, step 4: if the detection result of the third on-position state 16 of the third circuit breaker 15 is off-position, automatically selecting a conventional switching control strategy as a switching-on control condition; when the first voltage signal 11 of the working bus 1 and the third voltage signal 13 of the second power supply 3 meet the conventional switching control condition, controlling the second on-position state 8 of the second circuit breaker 5 to switch on the second circuit breaker 5, thereby realizing the process of switching the first power supply 2 to the second power supply 3 for supplying power;
and 5: if the detection result of the third on-position state 16 of the third circuit breaker 15 is on-position, automatically selecting a generator switching control strategy as a switching-on control condition; when the first voltage signal 11 of the working bus 1 and the third voltage signal 13 of the second power supply 3 meet the generator switching control condition through calculation, the second on-position state 8 of the second circuit breaker 5 is controlled to enable the second circuit breaker 5 to be switched on, and therefore the process of switching the first power supply 2 to the second power supply 3 for supplying power is achieved.
In order to meet the flexible application under different working conditions on site, different control conditions are designed for a conventional switching control strategy and a generator switching control strategy which are preset in the device, and a user can adjust and store corresponding condition fixed values through liquid crystal and key man-machine interface operations of a panel, so that the application requirements under different working conditions are met.
The invention has the following beneficial effects: 1. the invention combines the conventional power supply fast switching control application function, adds the detection and storage of the state result of the generator breaker in the CPU plug-in unit of the power supply switching device, and also adds various preset switching control strategies and corresponding realization conditions; when the automatic power switching is executed, according to the detected and stored state detection result of the generator breaker, a reasonable switching control strategy is automatically selected as a switching-on control condition, and safe and quick automatic power switching control 2 under different working conditions is realized. 3. This device guarantees promptly not to take place because of the unable start-up problem of main power higher level outage fast switch-on device of self-contained unit power when switching in, also ensures to send out the balanced bus of electricity, device malfunction problem when the main power inlet wire does not have the current, increased simultaneously in fast switch action export logic not cutting the self-contained unit circuit breaker when satisfying fast switch-over, switching over in the same term, directly closed stand-by power supply inlet wire function, select the function of jumping self-contained unit circuit breaker and closing stand-by inlet wire when not complying with fast switch-over, switching over in the same term condition. The safety of the generator set and the power grid is guaranteed, and the electric quantity loss caused by switching off the generator is reduced to the maximum extent.
Drawings
FIG. 1 is a diagram of the operation of a generator-less system of the present invention;
FIG. 2 is a diagram of the operation of the present invention with a generator;
FIG. 3 is a schematic diagram of the power switching device according to the present invention;
FIG. 4 is a schematic diagram illustrating an automatic selection of a switching strategy of the power switching device according to the present invention.
In the figure: the system comprises a working bus 1, a first power supply 2, a second power supply 3, a first circuit breaker 4, a second circuit breaker 5, a power switching device 6, a first closing state 7, a second closing state 8, a first switching-on command 9, a second switching-on command 10, a first voltage signal 11, a second voltage signal 12, a third voltage signal 13, a generator 14, a third circuit breaker 15 and a third closing state 16.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
A power supply switching device for automatically detecting the running state of a generator is disclosed, as shown in fig. 1 and fig. 2, comprising a working bus 1, a first power supply 2, a second power supply 3, a generator 14 and a power supply switching device 6, and is characterized in that: the first power supply 2, the second power supply 3 and the generator 14 are connected with the working bus 1 through loops, and any one loop of the first power supply 2 and the second power supply 3 supplies power to the working bus 1; a first circuit breaker 4 is arranged on a loop between the first power supply 2 and the working bus 1, a second circuit breaker 5 is arranged on a loop between the second power supply 3 and the working bus 1, and a third circuit breaker 15 is arranged on a loop between the generator 14 and the working bus 1; the state loops of the first breaker 4, the second breaker 5 and the third breaker 15 are connected to the input end of the power switching device 6; the output end of the power switching device 6 is connected with an operation loop of a first circuit breaker 4 and a second circuit breaker 5; the input end of the power supply switching device 6 is connected with a first voltage signal 11, a first power supply voltage signal 12 and a third voltage signal 13, and the power supply switching device 6 collects the voltage signals of the working bus 1, the first power supply 2 and the second power supply 3.
As shown in fig. 3, the POWER switching device 6 is composed of a plurality of independent functional plug-ins, mainly including an HMI plug-in, an AD plug-in, a DO plug-in, a DI plug-in, a POWER plug-in, and a CPU plug-in.
The HMI plug-in is a human-computer operation interface plug-in, mainly is a window of human-computer conversation, and comprises panel keys, liquid crystal and indicator light display; the AD plug-in is an analog quantity acquisition plug-in, and mainly acquires voltage signals of a bus and each incoming line, and the signals are generally output after being converted by voltage transformers of different grades; the DO plug-in is a command and signal output plug-in, is mainly used for outputting a breaker switching-on and switching-off control command to the outside by the device, and also comprises alarm signals such as voltage abnormity, working abnormity and the like; the DI plug-in is a signal acquisition plug-in and mainly comprises a circuit and generator circuit breaker opening and closing position state and also comprises a starting state, a locking state or other condition opening and closing state provided by the outside; the POWER plug-in is a POWER supply module, is connected with an externally provided working POWER supply and is converted into POWER supplies of various levels required by the interior of the device; the CPU plug-in is the control core of the power switching device, completes the acquisition of the input data of the AD plug-in and the DI plug-in, monitors the conditions of bus voltage and incoming line voltage, saves the state results of circuits and generator circuit breakers acquired by the DI plug-in, also saves various switching control strategies preset by programs and corresponding implementation conditions, and automatically selects the power switching control strategy according to the saved state results of the generator circuit breakers when the power switching conditions are met.
The first on-position state 7 of the first circuit breaker 4, the second on-position state 8 of the second circuit breaker 5 and the third on-position state 16 of the third circuit breaker 15 are connected into a DI plug-in unit of the power supply switching device 6 through hard wiring; a first switching-on command 9 of the first circuit breaker 4 and a second switching-off command 10 of the second circuit breaker 5 are connected into a DO plug-in unit of the power switching device 6 through hard wiring; a first voltage signal 11 of the working bus 1, a second voltage signal 12 of the first power supply 2 and a third voltage signal 13 of the second power supply 3 are all connected to the AD plug-in unit of the power supply switching device 6 through hard wiring; the power supply switching device 6 monitors a first voltage signal 11 of the working bus 1, a second voltage signal 12 of the first power supply 2, a third voltage signal 13 of the second power supply 3, a first closing state 7 of the first circuit breaker 4, a second closing state 8 of the second circuit breaker 5 and a third closing state 16 of the third circuit breaker 15 in real time.
A power switching method for automatically detecting the operating state of a generator, as shown in fig. 4, includes the following steps:
step 1: under the condition of normal power supply, the first power supply 2 supplies power to the working bus 1, a first closed state 7 of the first circuit breaker 4 is closed, a second closed state 8 of the second circuit breaker 5 is separated, and the second power supply 3 serves as a standby power supply;
step 2: the power supply switching device 6 automatically starts power supply switching control when monitoring that the first voltage signal 11 of the working bus 1 is abnormal;
and step 3: when the power supply switching device 6 starts the automatic power supply switching, monitoring whether a third voltage signal 13 of the second power supply 3 is normal; after monitoring that the third voltage signal 13 of the second power supply 3 is normal, controlling a first switching-on/off command 9 of the first circuit breaker 4 to switch off the first circuit breaker 4; according to the detection result of the third on-position state 16 of the third breaker 15 stored by the CPU plug-in, automatically selecting a corresponding switching control strategy to detect the closing condition;
and 4, step 4: if the detection result of the third on-position state 16 of the third circuit breaker 15 is off-position, automatically selecting a conventional switching control strategy as a switching-on control condition; when the first voltage signal 11 of the working bus 1 and the third voltage signal 13 of the second power supply 3 meet the conventional switching control condition, controlling the second on-position state 8 of the second circuit breaker 5 to switch on the second circuit breaker 5, thereby realizing the process of switching the first power supply 2 to the second power supply 3 for supplying power;
and 5: if the detection result of the third on-position state 16 of the third circuit breaker 15 is on-position, automatically selecting a generator switching control strategy as a switching-on control condition; when the first voltage signal 11 of the working bus 1 and the third voltage signal 13 of the second power supply 3 meet the generator switching control condition through calculation, the second on-position state 8 of the second circuit breaker 5 is controlled to enable the second circuit breaker 5 to be switched on, and therefore the process of switching the first power supply 2 to the second power supply 3 for supplying power is achieved.
In order to meet the flexible application under different working conditions on site, different control conditions are designed for a conventional switching control strategy and a generator switching control strategy which are preset in the device, and a user can adjust and store corresponding condition fixed values through liquid crystal and key man-machine interface operations of a panel, so that the application requirements under different working conditions are met.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides an automatic detect power auto-change over device of generator running state, includes work generating line (1), first power (2), second power (3), generator (14) and power auto-change over device (6), its characterized in that: the first power supply (2), the second power supply (3) and the generator (14) are connected with the working bus (1) through loops, and any loop in the first power supply (2) and the second power supply (3) supplies power to the working bus (1); a first circuit breaker (4) is installed on a loop between the first power supply (2) and the working bus (1), a second circuit breaker (5) is installed on a loop between the second power supply (3) and the working bus (1), and a third circuit breaker (15) is installed on a loop between the generator (14) and the working bus (1); the state loops of the first breaker (4), the second breaker (5) and the third breaker (15) are connected to the input end of the power switching device (6); the output end of the power switching device (6) is connected with an operation loop of a first circuit breaker (4) and an operation loop of a second circuit breaker (5); the input end of the power supply switching device (6) is connected with a first voltage signal (11), a first power supply voltage signal (12) and a third voltage signal (13), and the power supply switching device (6) collects voltage signals of the working bus (1), the first power supply (2) and the second power supply (3).
2. The power switching device and method for automatically detecting the running state of the generator according to claim 1, wherein: the POWER supply switching device (6) is composed of a plurality of plug-ins with independent functions, and mainly comprises an HMI plug-in, an AD plug-in, a DO plug-in, a DI plug-in, a POWER plug-in and a CPU plug-in.
3. The power switching device and method for automatically detecting the running state of the generator according to claim 2, wherein: the HMI plug-in is a human-computer operation interface plug-in, mainly is a window of human-computer conversation, and comprises panel keys, liquid crystal and indicator light display; the AD plug-in is an analog quantity acquisition plug-in, and mainly acquires voltage signals of a bus and each incoming line, and the signals are generally output after being converted by voltage transformers of different grades; the DO plug-in is a command and signal output plug-in, is mainly used for outputting a breaker switching-on and switching-off control command to the outside by the device, and also comprises alarm signals such as voltage abnormity, working abnormity and the like; the DI plug-in is a signal acquisition plug-in and mainly comprises a circuit and generator circuit breaker opening and closing position state and also comprises a starting state, a locking state or other condition opening and closing state provided by the outside; the POWER plug-in is a POWER supply module, is connected with an externally provided working POWER supply and is converted into POWER supplies of various levels required by the interior of the device; the CPU plug-in is the control core of the power switching device, completes the acquisition of the input data of the AD plug-in and the DI plug-in, monitors the conditions of bus voltage and incoming line voltage, saves the state results of circuits and generator circuit breakers acquired by the DI plug-in, also saves various switching control strategies preset by programs and corresponding implementation conditions, and automatically selects the power switching control strategy according to the saved state results of the generator circuit breakers when the power switching conditions are met.
4. The power switching device and method for automatically detecting the running state of the generator according to claim 3, wherein: the first on-position state (7) of the first circuit breaker (4), the second on-position state (8) of the second circuit breaker (5) and the third on-position state (16) of the third circuit breaker (15) are connected into a DI plug-in unit of the power switching device (6) through hard wiring; a first switching-on command (9) of the first circuit breaker (4) and a second switching-off command (10) of the second circuit breaker (5) are connected into a DO plug-in unit of the power switching device (6) through hard wiring; a first voltage signal (11) of the working bus (1), a second voltage signal (12) of the first power supply (2) and a third voltage signal (13) of the second power supply (3) are all connected into an AD plug-in unit of the power supply switching device (6) through hard wiring; the power supply switching device (6) monitors a first voltage signal (11) of the working bus (1), a second voltage signal (12) of the first power supply (2), a third voltage signal (13) of the second power supply (3), a first closing state (7) of the first circuit breaker (4), a second closing state (8) of the second circuit breaker (5) and a third closing state (16) of the third circuit breaker (15) in real time.
5. A power supply switching method for automatically detecting the running state of a generator comprises the following steps:
step 1: under the condition of normal power supply, the first power supply (2) supplies power to the working bus (1), a first closed state (7) of the first circuit breaker (4) is in a closed position, a second closed state (8) of the second circuit breaker (5) is in a separated position, and the second power supply (3) serves as a standby power supply;
step 2: the power supply switching device (6) automatically starts power supply switching control when monitoring that a first voltage signal (11) of the working bus (1) is abnormal;
and step 3: when the power supply switching device (6) starts the automatic switching of the power supply, monitoring whether a third voltage signal (13) of the second power supply (3) is normal; after monitoring that the third voltage signal (13) of the second power supply (3) is normal, controlling a first switching-on command (9) of the first circuit breaker (4) to switch off the first circuit breaker (4); according to a detection result of a third on-position state (16) of a third circuit breaker (15) stored by a CPU plug-in, automatically selecting a corresponding switching control strategy to detect a closing condition;
and 4, step 4: if the detection result of the third on-position state (16) of the third circuit breaker (15) is off-position, automatically selecting a conventional switching control strategy as a switching-on control condition; when a first voltage signal (11) of a working bus (1) and a third voltage signal (13) of a second power supply (3) meet a conventional switching control condition through calculation, a second on-position state (8) of a second circuit breaker (5) is controlled to switch on the second circuit breaker (5), and therefore the process that the first power supply (2) is switched to the second power supply (3) for supplying power is achieved;
and 5: if the detection result of the third on-position state (16) of the third circuit breaker (15) is on-position, automatically selecting a generator switching control strategy as a switching-on control condition; when a first voltage signal (11) of the working bus (1) and a third voltage signal (13) of the second power supply (3) meet a generator switching control condition through calculation, a second on-position state (8) of the second circuit breaker (5) is controlled to enable the second circuit breaker (5) to be switched on, and therefore the process that the first power supply (2) is switched to the second power supply (3) to supply power is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220485.7A CN112366811A (en) | 2020-11-05 | 2020-11-05 | Power supply switching device and method for automatically detecting running state of generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220485.7A CN112366811A (en) | 2020-11-05 | 2020-11-05 | Power supply switching device and method for automatically detecting running state of generator |
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| CN112366811A true CN112366811A (en) | 2021-02-12 |
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| CN202011220485.7A Withdrawn CN112366811A (en) | 2020-11-05 | 2020-11-05 | Power supply switching device and method for automatically detecting running state of generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922362A (en) * | 2021-09-24 | 2022-01-11 | 国网北京市电力公司 | Circuit breaker control system and method |
-
2020
- 2020-11-05 CN CN202011220485.7A patent/CN112366811A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922362A (en) * | 2021-09-24 | 2022-01-11 | 国网北京市电力公司 | Circuit breaker control system and method |
| CN113922362B (en) * | 2021-09-24 | 2024-03-15 | 国网北京市电力公司 | Circuit breaker control system and method |
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