CN110149007B - Alternating current active electronic current transformer and power supply method - Google Patents
Alternating current active electronic current transformer and power supply method Download PDFInfo
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- CN110149007B CN110149007B CN201910436492.1A CN201910436492A CN110149007B CN 110149007 B CN110149007 B CN 110149007B CN 201910436492 A CN201910436492 A CN 201910436492A CN 110149007 B CN110149007 B CN 110149007B
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- 230000002035 prolonged effect Effects 0.000 abstract description 7
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/30—Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laser Beam Processing (AREA)
Abstract
The embodiment of the application provides an active electronic current transformer and a power supply method, comprising the following steps: the high-voltage side coil power supply and the low-voltage side laser power supply are used for supplying power to the high-voltage side signal collector; the high-voltage side signal collector is used for detecting the current flowing through the current transformer and the power supply voltage of the low-voltage side laser power supply and feeding back the detection result to the laser power supply control unit; and the laser power supply control unit is used for controlling the low-voltage side laser power supply to be in a continuous energy supply state or a standby heartbeat state according to the fed-back current flowing through the current transformer, and adjusting the output power of the laser according to the power supply voltage of the low-voltage side laser power supply fed back by the high-voltage side collector. In the scheme of the embodiment of the application, the laser power supply control unit is arranged to control the output power and the working state of the low-voltage side laser power supply, so that double power supplies are realized, the reliability of the power supply of the current transformer is improved, and the method has the advantages of simple and clear principle and prolonged service life of the laser.
Description
Technical Field
The application relates to the technical field of power electronics, in particular to an alternating current active electronic current transformer and a power supply method.
Background
Current transformers are important devices required for metering and relay protection in power systems. Electronic Current Transformers (ECT) can be classified into active electronic current transformers and passive electronic current transformers according to whether or not the high voltage side portion needs power supply.
Because the signal collector of the active electronic transformer is installed at the high voltage side and is composed of an electronic circuit, a corresponding power supply must be provided to the high voltage side signal collector. Therefore, the high-voltage side power supply technology becomes a key technology in the practical process of the active electronic transformer. Aiming at the key technology, a high-voltage side coil electricity taking and laser energy supplying mode is mostly adopted in an alternating current system.
However, the high-voltage side coil power supply has the problems of unstable power supply when the line current is too low, reliability of the laser when the high-voltage side coil power supply works, prolonged service life after long-term operation degradation of the laser, and the like. As is well known, the high-voltage side signal collector of the electronic current transformer is used as a data source for protecting the measuring and metering equipment, and continuous and effective operation must be ensured as much as possible, so that an ac active electronic current transformer and a power supply method are needed to solve the above problems.
Disclosure of Invention
The embodiment of the application provides an alternating current active electronic current transformer and a power supply method, which are used for solving the problems of low reliability and the like of a high-voltage side power supply in the prior art.
An ac active electronic current transformer comprising: the high-voltage side signal collector, the high-voltage side coil power supply, the low-voltage side laser power supply and the laser power supply control unit;
the high-voltage side coil power supply is used for supplying power to the high-voltage side signal collector;
the low-voltage side laser power supply is used for supplying power to the high-voltage side signal collector;
the high-voltage side signal collector is used for detecting the current flowing through the current transformer and the power supply voltage of the low-voltage side laser power supply and feeding back the detection result to the laser power supply control unit, or is used for detecting the current flowing through the current transformer and determining the working state of the low-voltage side laser power supply;
the laser power supply control unit is used for controlling the low-voltage side laser power supply to be in a continuous energy supply state or a standby heartbeat state according to the current fed back by the high-voltage side collector and adjusting the output power of the laser according to the power supply voltage of the low-voltage side laser power supply fed back by the high-voltage side collector or the working state of the low-voltage side laser power supply.
An active electronic current transformer power supply method, the ac active electronic current transformer comprising: the high-voltage side signal acquisition device, a high-voltage side coil power supply, a low-voltage side laser power supply and a laser power supply control unit, wherein the method comprises the following steps:
receiving the current flowing through the current transformer and the power supply voltage of the low-voltage side laser power supply fed back by the high-voltage side signal acquisition device, or receiving the current flowing through the current transformer and fed back by the high-voltage side signal acquisition device and determining the working state of the low-voltage side laser power supply;
and controlling the low-voltage side laser power supply to be in a continuous energy supply state or a standby heartbeat state according to the current fed back by the high-voltage side collector and adjusting the output power of the laser according to the power supply voltage of the low-voltage side laser power supply or the working state of the low-voltage side laser power supply fed back by the high-voltage side collector.
In the scheme of the embodiment of the application, the functions of detecting the current flowing through the current transformer and the power supply voltage of the low-voltage side laser power supply or detecting the current flowing through the current transformer and determining the working state of the low-voltage side laser power supply are newly added on the high-voltage side signal collector, and the laser power supply control unit is arranged to control the output power and the working state of the low-voltage side laser power supply, so that the dual power supply is realized, the reliability of the power supply of the current transformer is improved, and the advantages of simple and definite principle and prolonged service life of the laser are realized.
Drawings
Fig. 1 is a schematic block diagram of an electronic current transformer according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an active electronic current transformer according to an embodiment of the present application;
fig. 3 is a power supply method of an active electronic current transformer according to an embodiment of the present application.
Detailed Description
In order to solve the problem that the power supply is unstable when the line current is too low in the power taking of a high-voltage side coil in the prior art, the embodiment of the application provides an active electronic current transformer and a power supply method.
As shown in fig. 1, a schematic block diagram of an ac active electronic current transformer includes: a high-voltage side coil power supply 11, a low-voltage side laser power supply 12, a high-voltage side signal collector 13 and a laser power supply control unit 14; the high-voltage side coil power supply 12 is a power supply circuit with the high-voltage side signal collector 13, the high-voltage side signal collector 13 is connected with the low-voltage side laser power supply through a laser fiber, the laser power supply control circuit 14 is a control circuit of the low-voltage side laser power supply 12, and the high-voltage side signal collector 13 is connected with the laser power supply control unit 14 through a communication fiber.
The high-voltage side coil power supply 11 is used for supplying power to the high-voltage side signal collector;
a low-side laser power supply 12 for supplying power to the high-side signal collector;
the high-voltage side signal collector 13 is used for detecting the current flowing through the current transformer and the supply voltage of the low-voltage side laser power supply and feeding back the detection result to the laser power supply control unit, or is used for detecting the current flowing through the current transformer and determining the working state of the low-voltage side laser power supply;
the laser power supply control unit 14 is configured to control the low-voltage side laser power supply to be in a continuous power supply state or a standby heartbeat state according to the current flowing through the current transformer and fed back by the high-voltage side collector, and adjust the output power of the laser according to the power supply voltage of the low-voltage side laser power supply or the working state of the low-voltage side laser power supply and fed back by the high-voltage side collector.
In the scheme, the high-voltage side coil power taking power supply and the low-voltage side laser power supply are adopted as the power supply of the electronic current transformer, the laser power supply control unit is arranged to control the output power and the working state of the low-voltage side laser power supply according to the feedback data of the high-voltage side signal collector, so that the dual power supply is realized, the reliability of the power supply of the current transformer is improved, the advantages of simple and clear principle and prolonged service life of the laser are achieved, the reliability of power supply is ensured to a certain extent, and the electronic current transformer is ensured to work continuously and effectively. And the two power supplies work, so that the service life of each power supply is prolonged to a certain extent, and the problem of short operation life of a long-term full-power working power supply caused by using a single power supply, particularly a low-voltage side laser power supply, is solved.
Preferably, the laser power control unit 14 is further configured to control the low-voltage side laser power output power change mode to output power in a set step increment mode based on the base output power P1 until reaching the set maximum output power Pmax, where the set step is the minimum adjustment power level difference P2.
Typically, before the product leaves the factory, the laser power supply control unit is set with a base output power P1, a minimum adjustment power level difference P2, and a maximum output power Pmax. When the laser power supply is initially operated, continuous energy supply or standby heartbeat is output according to the basic output power P1. The laser power supply control unit can control the output power of the laser to be adjusted between the set minimum output power and the set maximum output power.
The high-voltage side signal collector is provided with a voltage alarm threshold; the high-voltage side signal collector is further used for comparing the power supply voltage of the low-voltage side laser power supply detected with the voltage alarm threshold and reporting the working state of the low-voltage side laser power supply to the laser power supply control unit based on a comparison result.
The laser power supply controller is further used for maintaining, increasing, decreasing or stopping outputting the output power of the low-voltage side laser power supply based on the received working state of the low-voltage side laser power supply.
Specifically, the voltage alarm threshold includes: a low-voltage side laser power supply voltage low-alarm threshold U1 and a voltage over-low fault threshold U2, wherein U2 is smaller than U1;
the high-voltage side signal collector is further configured to report a state S1 to the laser power control unit if it is detected that the supply voltage of the low-voltage side laser power is higher than U1; if the power supply voltage of the laser power supply at the low voltage side is detected to be between U1 and U2, reporting a state S2 to a laser power supply control unit; if the power supply voltage of the laser power supply at the low voltage side is detected to be lower than U2, reporting a state S3 to a laser power supply control unit;
the laser power supply controller is further configured to maintain the current power output of the low-voltage side laser power supply unchanged if the feedback state of the high-voltage side signal collector is S1; if the output power of the laser power supply reaches the maximum output power Pmax, but the feedback state of the received high-voltage side signal collector is S2, the existing power output of the laser power supply is maintained unchanged; if the output power of the laser power supply reaches the maximum output power Pmax, but the feedback state of the high-voltage side signal collector is S3, stopping the output of the low-voltage side laser power supply; if the feedback state of the high-voltage side signal collector is S2 and the output power of the low-voltage side laser power supply does not reach Pmax, increasing the power output of the laser power supply every Tp time interval until the output power reaches Pmax or the feedback state of the high-voltage side signal collector is S1; if the feedback state of the high-voltage side signal collector is changed from S1 or S2 to S3, stopping outputting the laser power supply; if the laser control unit just works and receives the feedback state of the high-voltage side signal collector as S3, the laser power supply power output is increased at intervals of Tp until the output power reaches Pmax or the feedback state of the signal collector is S2, and Tp=1-1000 ms.
When the laser control unit controls the laser power supply to work in a standby heartbeat state and the output power of the laser power supply is in a non-working state, the feedback state of the high-voltage side signal acquisition unit is received as S3; when the laser power supply outputs power pulse active state, the laser power is regulated by referring to the laser power supply working in a continuous energy supply state.
In the above scheme, the high-voltage side coil power supply 11 can be selected as a main power supply, and the low-voltage side laser power supply 12 is an auxiliary power supply; the low-voltage side laser power supply 11 can also be selected as a main power supply, and the high-voltage side coil power supply 12 is also selected as an auxiliary power supply. Considering that the service life of the power supply for the high-voltage side coil is longer, and the power supply is more stable under the general condition, the service life of the low-voltage side laser power supply is shorter in long-term full-power working power supply, therefore, the high-voltage side coil power supply is better as a main power supply, and the low-voltage side laser power supply is better as an auxiliary power supply.
The laser power supply control unit 14 is further configured to control the low-voltage side laser power supply to be in a standby heartbeat state if it is determined that the current flowing through the current transformer is greater than Iset1 and the duration is greater than or equal to T seconds, where iset1=k1×i, I is a maximum current value at which the high-voltage side signal collector stably operates, 1.05 is greater than or equal to k1 and less than or equal to 1.2, and 0.01s is greater than or equal to T and less than or equal to 10s.
Here, the current flowing through the current transformer is higher than the current Iset1 and the duration is longer than or equal to T seconds, and at this time, the high-voltage side coil power supply can ensure stable power supply for the high-voltage side signal collector, and the high-voltage side power supply circuit is used as a single power supply source for the high-voltage side signal collector.
The laser power supply control unit is further used for controlling the low-voltage side laser power supply to be in a continuous energy supply state if the current flowing through the current transformer is judged to be smaller than Iset 2; wherein Iset2=k2×I, I is the maximum current value of the high-voltage side signal collector working stably, k2 is more than or equal to 1.01 and less than or equal to 1.10, and k2 is less than k1.
Here, if the current flowing through the current transformer is lower than the current Iset2, the high-voltage side power taking circuit cannot ensure stable power supply to the high-voltage side signal collector, and the laser power supply control unit controls the low-voltage side laser to supply power to the high-voltage side signal collector.
The above I can be obtained by: the manufacturer tests the maximum current value that the high-voltage side signal collector can work stably by taking power from the high-voltage side coil according to the laboratory batch.
Preferably, a module with an energy storage and power supply function, such as a power supply capacitor, is designed in the high-voltage side signal collector, so that the capacitor can maintain the high-voltage side signal collector to still continuously work for a certain time after the external power supply source is changed from normal power supply to the external power supply source and all fails.
Specifically, the low-voltage side laser power supply comprises a laser;
the laser is used for sending a laser continuous energy supply signal or a laser pulse signal to the high-voltage side signal collector.
When the laser is used as a power supply source, a laser continuous energy supply signal is sent to the high-voltage side signal collector; when the laser is not used as a power supply, a laser pulse signal is sent to the high-voltage side signal collector to indicate that the laser is effective, and effective work can be ensured.
The laser heartbeat pulse signal can be a laser power supply pulse which is sent out in a time period of N milliseconds every M seconds, the value of M can be between 0.1s and 10s, the value of N can be between 1ms and 100ms, and the time period of M seconds can be at least twice the time period of N milliseconds.
Specifically, the laser power control unit 14 is further configured to control the laser to send a laser pulse signal to the high-voltage side signal collector after controlling the low-voltage side laser power to stop outputting power.
Preferably, the high-voltage side signal collector is configured to detect a laser continuous power supply signal and a laser pulse signal, and if the detected laser continuous power supply signal or the laser pulse signal does not conform to a predefined signal state, determine that the laser fails and send failure information to the laser power supply control unit, where the laser continuous power supply signal or the laser pulse signal does not conform to the predefined signal state: when the laser continuously supplies energy to the working state of the signal, the power supply voltage in the high-voltage side signal collector is lower than a set value; when the laser pulse signal is in a working state, the power supply voltage in the high-voltage side signal collector is lower than a set value U2 when the laser pulse is sent out, or the power supply voltage pulse form monitored in the high-voltage side signal collector is not in accordance with the corresponding laser pulse signal form;
the laser power supply control unit is further used for receiving and outputting laser failure information.
Here, the working state of the laser pulse signal is a state perceived by the high-voltage side signal collector, and at the moment, the high-voltage side coil power supply supplies power to the high-voltage signal collector; likewise, the laser continuous energy supply signal working state is also a state perceived by the high-voltage side signal collector, and at the moment, the low-voltage side laser power supply supplies power for the high-voltage signal collector.
Because the high-voltage side signal collector has the continuous capacitor to ensure that the high-voltage side signal collector still continuously works for a certain time, even if no current flows through the high-voltage side signal collector at the moment, the high-voltage side signal collector can also finish laser failure judgment and send failure information to the laser power supply control unit in a communication mode.
It should be noted that the design of the high-voltage side signal collector should be able to withstand the influence of the high-voltage side power taking circuit and the low-voltage side laser dual power supply during full power supply, so as not to cause the adverse conditions of heating, burning loss and the like.
Compared with the prior art, the application not only ensures the reliability of the high-voltage side power supply, but also has the following beneficial effects: (1) When the circuit is in a normal running state, the circuit current is large enough, and the laser is in a non-working state, so that the service life of the laser can be prolonged. (2) The laser device has the function of self-checking the effectiveness of the laser device, and can immediately judge and report when the laser device fails.
The schematic structural diagram of the active electronic current transformer in the embodiment of the application can be shown in fig. 2, 1 is a high-voltage side current conductor, 2 is a high-voltage side protective cover body, 3 is an insulating support, 4 is an optical fiber, 5 is a high-voltage side signal collector, 6 is a high-voltage side power taking coil, and 7 is a low-voltage side laser.
Based on the same inventive concept, the embodiment of the application also provides a power supply method of the active electronic current transformer, as shown in fig. 3, comprising the following steps:
step 31: receiving the current flowing through the current transformer and the power supply voltage of the low-voltage side laser power supply fed back by the high-voltage side signal acquisition device, or receiving the current flowing through the current transformer and fed back by the high-voltage side signal acquisition device and determining the working state of the low-voltage side laser power supply;
step 32: and controlling the low-voltage side laser power supply to be in a continuous energy supply state or a standby heartbeat state according to the current fed back by the high-voltage side collector and adjusting the output power of the laser according to the power supply voltage of the low-voltage side laser power supply or the working state of the low-voltage side laser power supply fed back by the high-voltage side collector.
According to the current flowing through the current transformer and fed back by the high-voltage side collector, controlling the low-voltage side laser power supply to be in a continuous energy supply state or a standby heartbeat state comprises:
if the current flowing through the current transformer is judged to be larger than Iset1 and the duration is longer than or equal to T seconds, controlling the laser power supply at the low voltage side to be in a standby heartbeat state, wherein Iset1=k1×I, I is the maximum current value of stable operation of the high voltage side signal collector, k1 is larger than or equal to 1.05 and smaller than or equal to 1.2, and T is larger than or equal to 0.01s and smaller than or equal to 10s;
if the current flowing through the current transformer is judged to be smaller than Iset2, the laser power supply at the low voltage side is controlled to be in a continuous energy supply state; wherein Iset2=k2×I, I is the maximum current value of the high-voltage side signal collector working stably, k2 is more than or equal to 1.01 and less than or equal to 1.10, and k2 is less than k1.
The scheme of the embodiment of the application provides a dual-power supply method which is applied to an alternating-current active electronic current transformer and adopts high-voltage side coil power taking and supplying and low-voltage side laser power supplying, and has the advantages of simple and clear principle, improvement of the reliability of the current transformer power supplying, prolonged service life of a laser and real-time self-checking of the effectiveness of the laser.
Those skilled in the art will appreciate that the drawing is merely a schematic representation of one preferred embodiment and that the modules or processes in the drawing are not necessarily required to practice the application.
Those skilled in the art will appreciate that the modules in the terminals in the embodiments may be distributed in the terminals in the embodiments according to the description of the embodiments, and that corresponding changes may be located in one or more terminals different from the present embodiments. The modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (5)
1. An ac active electronic current transformer, comprising: the high-voltage side signal collector, the high-voltage side coil power supply, the low-voltage side laser power supply and the laser power supply control unit;
the high-voltage side coil power supply is used for supplying power to the high-voltage side signal collector;
the low-voltage side laser power supply is used for supplying power to the high-voltage side signal collector;
the high-voltage side signal collector is used for detecting the current flowing through the current transformer and the power supply voltage of the low-voltage side laser power supply and feeding back the detection result to the laser power supply control unit, or is used for detecting the current flowing through the current transformer and determining the working state of the low-voltage side laser power supply;
the laser power supply control unit is used for controlling the low-voltage side laser power supply to be in a continuous energy supply state or a standby heartbeat state according to the current flowing through the current transformer and fed back by the high-voltage side signal acquisition unit, and adjusting the output power of the low-voltage side laser power supply according to the power supply voltage of the low-voltage side laser power supply or the working state of the low-voltage side laser power supply and fed back by the high-voltage side signal acquisition unit;
the laser power supply control unit is further used for controlling the change mode of the output power of the low-voltage side laser power supply to output power in an incremental mode according to a set step length on the basis of the basic output power P1 until the set maximum output power Pmax is reached, wherein the set step length is the minimum adjustment power level difference P2;
the high-voltage side signal collector is provided with a voltage alarm threshold;
the high-voltage side signal collector is further used for comparing the detected power supply voltage of the low-voltage side laser power supply with a voltage alarm threshold and reporting the working state of the low-voltage side laser power supply to the laser power supply control unit based on a comparison result;
the laser power supply control unit is further used for maintaining, increasing, decreasing or stopping outputting the output power of the low-voltage side laser power supply based on the received working state of the low-voltage side laser power supply;
the laser power supply control unit is further used for controlling the low-voltage side laser power supply to be in a standby heartbeat state if the current flowing through the current transformer is judged to be greater than Iset1 and the duration time is longer than or equal to T seconds, wherein Iset1=k1×I, I is the maximum current value of stable operation of the high-voltage side signal collector, k1 is more than or equal to 1.05 and less than or equal to 1.2, and T is more than or equal to 0.01s and less than or equal to 10s;
the laser power supply control unit is further used for controlling the low-voltage side laser power supply to be in a continuous energy supply state if the current flowing through the current transformer is judged to be smaller than Iset 2; wherein Iset2=k2×I, I is the maximum current value of the high-voltage side signal collector working stably, k2 is more than or equal to 1.01 and less than or equal to 1.10, and k2 is less than k1.
2. The current transformer of claim 1, wherein the high voltage side coil power source is a primary power source.
3. The current transformer of claim 1, wherein the low side laser power supply comprises a laser;
the laser is used for sending a laser continuous energy supply signal or a laser pulse signal to the high-voltage side signal collector under the control of the laser power supply control unit.
4. The current transformer of claim 1, wherein the high-side signal collector is configured to detect a laser continuous power signal and a laser pulse signal, and if neither the detected laser continuous power signal nor the detected laser pulse signal meets a predefined signal condition, determine that the laser fails and send failure information to the laser power control unit, wherein the predefined signal condition is not met: when the laser continuously supplies energy to the working state of the signal, the power supply voltage in the high-voltage side signal collector is lower than a set value; when the laser pulse signal is in a working state, the power supply voltage in the high-voltage side signal collector is lower than a set value when the laser pulse is sent out, or the power supply voltage pulse form monitored in the high-voltage side signal collector is not in accordance with the corresponding laser pulse signal form;
the laser power supply control unit is further used for receiving and outputting laser failure information.
5. An active electronic current transformer power supply method is characterized in that an alternating current active electronic current transformer comprises: the high-voltage side signal acquisition device, a high-voltage side coil power supply, a low-voltage side laser power supply and a laser power supply control unit, wherein the method comprises the following steps:
receiving the current flowing through the current transformer and the power supply voltage of the low-voltage side laser power supply fed back by the high-voltage side signal acquisition device, or receiving the current flowing through the current transformer and fed back by the high-voltage side signal acquisition device and determining the working state of the low-voltage side laser power supply;
controlling the low-voltage side laser power supply to be in a continuous energy supply state or a standby heartbeat state according to the current fed back by the high-voltage side signal collector and adjusting the output power of the laser according to the power supply voltage of the low-voltage side laser power supply or the working state of the low-voltage side laser power supply fed back by the high-voltage side signal collector;
the laser power supply control unit is further used for controlling the change mode of the output power of the low-voltage side laser power supply to output power in an incremental mode according to a set step length on the basis of the basic output power P1 until the set maximum output power Pmax is reached, wherein the set step length is the minimum adjustment power level difference P2;
the high-voltage side signal collector is provided with a voltage alarm threshold;
the high-voltage side signal collector is further used for comparing the detected power supply voltage of the low-voltage side laser power supply with a voltage alarm threshold and reporting the working state of the low-voltage side laser power supply to the laser power supply control unit based on a comparison result;
the laser power supply control unit is further used for maintaining, increasing, decreasing or stopping outputting the output power of the low-voltage side laser power supply based on the received working state of the low-voltage side laser power supply;
the laser power supply control unit is further used for controlling the low-voltage side laser power supply to be in a standby heartbeat state if the current flowing through the current transformer is judged to be greater than Iset1 and the duration time is longer than or equal to T seconds, wherein Iset1=k1×I, I is the maximum current value of stable operation of the high-voltage side signal collector, k1 is more than or equal to 1.05 and less than or equal to 1.2, and T is more than or equal to 0.01s and less than or equal to 10s;
the laser power supply control unit is further used for controlling the low-voltage side laser power supply to be in a continuous energy supply state if the current flowing through the current transformer is judged to be smaller than Iset 2; wherein Iset2=k2×I, I is the maximum current value of the high-voltage side signal collector working stably, k2 is more than or equal to 1.01 and less than or equal to 1.10, and k2 is less than k1.
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| CN116054429B (en) * | 2023-03-02 | 2023-06-27 | 西安西电高压开关有限责任公司 | Laser energy supply system of electronic transformer and laser power adjustment method |
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| CN202352507U (en) * | 2011-09-08 | 2012-07-25 | 中国西电电气股份有限公司 | High voltage-side power supply device for electronic current transformer |
| JP2014099948A (en) * | 2012-11-13 | 2014-05-29 | Mitsumi Electric Co Ltd | Switching power supply device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202352507U (en) * | 2011-09-08 | 2012-07-25 | 中国西电电气股份有限公司 | High voltage-side power supply device for electronic current transformer |
| JP2014099948A (en) * | 2012-11-13 | 2014-05-29 | Mitsumi Electric Co Ltd | Switching power supply device |
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Effective date of registration: 20230807 Address after: 250000 room 1601, block a, building 1, Jinan pharmaceutical Valley R & D platform zone, No. 1, north section of Gangxing Third Road, comprehensive free trade zone, high tech Zone, Jinan City, Shandong Province Applicant after: Shandong United Power Industry Development Co.,Ltd. Address before: 250012 room 1611, block a, building 1, Jinan pharmaceutical Valley R & D platform, No. 1, north section of Gangxing Third Road, comprehensive free trade zone, high tech Zone, Jinan City, Shandong Province Applicant before: SHANDONG LIANHE POWER TECHNOLOGY CO.,LTD. |
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Denomination of invention: An AC active electronic current transformer and its power supply method Effective date of registration: 20231204 Granted publication date: 20230905 Pledgee: Bank of China Limited Jinan high tech sub branch Pledgor: Shandong United Power Industry Development Co.,Ltd. Registration number: Y2023370000134 |