CN113162184A - Automatic power supply control system and method for CT power taking - Google Patents
Automatic power supply control system and method for CT power taking Download PDFInfo
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- CN113162184A CN113162184A CN202110481028.1A CN202110481028A CN113162184A CN 113162184 A CN113162184 A CN 113162184A CN 202110481028 A CN202110481028 A CN 202110481028A CN 113162184 A CN113162184 A CN 113162184A
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
Abstract
The invention provides a power supply automatic control system and method for CT power taking, which comprises a CT power taking circuit, a bleeder circuit, a controller, a battery control circuit and an energy storage unit connected with the battery control circuit; the input of CT can circuit is used for being connected to the mutual-inductor, bleeder circuit's output and CT can circuit's input is got, bleeder circuit's input even and battery control circuit's input is connected CT can circuit's output is got, the controller with CT can circuit, bleeder circuit and battery charging control circuit electrical connection has solved current mutual-inductor response energy supply, and the problem that there is the blind spot of bleeding.
Description
Technical Field
The invention relates to the field of electromagnetic induction, in particular to a power supply automatic control system and method for CT power taking.
Background
Smart grids have become a new trend in world grid development. In the face of new situation and new challenge, national grid companies propose a strong smart grid strategic target which accelerates the construction of a low-carbon direction with extra-high voltage as a backbone grid frame and new energy development, and is characterized by informatization, automation and interaction in all levels of power grid coordinated development according to the basic national conditions of China. In the whole smart grid architecture, a high-voltage transmission line is a very important ring, and is used for transmitting electric energy generated by a power plant to tens of millions of clients, and once a fault occurs, influence which is difficult to measure is generated, so that monitoring equipment on a transmission line is needed; with the continuous improvement of the grade of the power transmission line, the monitoring equipment is in a complex environment with high voltage and strong magnetic field, and the requirement on the stability of the power supply is very high.
In prior art, check out test set's power supply mode is more, supplies power to equipment through the battery firstly, and the principle of battery energy supply is the electric energy with chemical energy conversion, and the biggest advantage is just stable but if using in high-power occasion, the life of battery is than short, often changes very inconveniently to it at the high-pressure side, and the cost also can accumulate and increase.
Secondly, solar energy supply: this mode receives overcast and rainy day, night and air quality influence, and power supply system gets the electricity inadequately easily to appear, can't support the long-time operation of terminal.
Thirdly, current transformer inductive energy supply (CT power taking): the lowest electricity taking of the high-voltage cable is 9A; and the influence of the current fluctuation of the transmission line is easily received, the CT energy taking efficiency is low, the magnetic saturation is easy, the automatic adjustment and protection of the current taking of the transmission line cannot be realized, and the reasonable energy leakage mode and the optimization of the power supply dead zone are a technical point to be broken through at present.
Fourthly, the scheme of low-voltage side energy supply (laser power supply) has the main defects of high manufacturing cost, small output power, limited service life and easy influence of environmental temperature. Fifth electric field coupling energy supply: this energy supply scheme advantage is that the circuit is simple, and the cost is lower, but the security is poor, need consider stand-by power supply, has increased the complexity of system, and multiple factors such as temperature, stray capacitance will all exert an influence to the stability of power, make the power reliability reduce.
In view of this, the present application is presented.
Disclosure of Invention
The invention provides a power supply automatic control system and method for CT power taking, and aims to solve the problem that dead zones exist in discharging in inductive energy supply of a current transformer.
The invention provides a power supply automatic control system for CT power taking, which comprises a CT power taking circuit, a bleeder circuit, a controller, a battery control circuit and an energy storage unit connected with the battery control circuit, wherein the energy storage unit is connected with the battery control circuit;
the input of CT can be got the circuit and is used for being connected to the mutual-inductor, bleeder circuit's output is in CT can be got the input of circuit, bleeder circuit's input and battery control circuit's input is connected CT can be got the output of circuit, the controller with CT can be got circuit, bleeder circuit and battery charge control circuit electrical connection.
Preferably, the CT energy-taking circuit comprises: the voltage-stabilizing circuit comprises an access terminal, a piezoresistor, a rectifying circuit, a voltage-stabilizing diode, a filtering circuit, a super capacitor and a first voltage-dividing circuit;
the resistor is arranged at two ends of the access terminal, the rectifying circuit is electrically connected with two ends of the voltage dependent resistor, the voltage stabilizing diode is arranged at two ends of the rectifying circuit, the filtering circuit is arranged at two ends of the voltage stabilizing diode, the output end of the filtering circuit is electrically connected with the input end of the first voltage division circuit, the super capacitor is arranged on the first voltage division circuit, and the output end of the first voltage division circuit is electrically connected with the input end of the controller.
Preferably, the bleeding circuit includes: the circuit comprises a second voltage division circuit, a first capacitor, a comparison circuit, a photoelectric isolation circuit and an absorption circuit;
the first capacitor is arranged on the second voltage division circuit, the second voltage division circuit is electrically connected with the input end of the comparison circuit, the output end of the comparison circuit is electrically connected with the input end of the photoelectric isolation circuit, the output end of the photoelectric isolation circuit is electrically connected with the control end of the absorption circuit, and the absorption circuit is arranged at the input end of the CT energy-taking circuit.
Preferably, the battery control circuit includes: the charging circuit comprises a first switch loop, a charging loop, a second switch loop, a third voltage division loop and a second capacitor;
the control end of the first switch loop is electrically connected with the output end of the controller, the output end of the CT energy taking circuit is electrically connected with the input end of the charging loop through the first switch circuit, the output end of the charging loop is electrically connected with the energy storage unit, the energy storage unit is connected to electric equipment through the second switch loop, the output end of the energy storage unit is electrically connected with the third voltage division loop, and the second capacitor is arranged on the third voltage division loop.
Preferably, the method further comprises the following steps: a boost circuit;
the first input end of the boosting loop is electrically connected with the output end of the CT energy obtaining circuit, the second input end of the boosting loop is electrically connected with the output end of the battery control circuit, and the output end of the boosting loop is used for being connected with electric equipment.
A second embodiment of the present invention provides a control method based on any one of the above, including:
the controller acquires a first voltage value of a super capacitor on the CT energy acquisition circuit;
the controller controls the CT energy taking circuit and the battery control circuit to supply energy to electric equipment according to the first voltage value.
Preferably, according to the first voltage value, the CT energy obtaining circuit and the battery control circuit are controlled to supply energy to the electric device, specifically:
when the controller judges that the first voltage value is larger than a first preset value, the CT energy taking circuit is controlled to charge the energy storage unit, and meanwhile, energy is supplied to electric equipment;
and when the controller judges that the first voltage value is between the first preset value and the second preset value, the CT energy taking circuit and the battery control circuit are controlled to alternately supply energy to the electric equipment.
Preferably, the method further comprises the following steps:
the controller obtains a second voltage value of the energy storage unit, and controls the battery control circuit to supply energy to the electric equipment independently when the second voltage value is judged to be larger than a third preset value and the first voltage value is lower than the second preset value.
Preferably, when the bleeder circuit determines that the value of the first capacitor exceeds a preset threshold, the input end of the CT energy-taking circuit is short-circuited to turn off the output power of the CT energy-taking circuit.
Based on the automatic control system and the method for the power supply of the CT power taking, provided by the invention, the bleeder circuit collects the voltage value of the first capacitor, and when the voltage value of the first capacitor is judged to be larger than the protection voltage, the CT power taking circuit is in short circuit, so that the power output by the CT power taking circuit is 0, and the interference on rear-end power utilization equipment is avoided.
Drawings
Fig. 1 is a schematic block diagram of an automatic power control system for CT power acquisition according to the present invention.
FIG. 2 is a schematic diagram of a CT power acquisition circuit according to the present invention;
FIG. 3 is a schematic diagram of a bleed circuit provided by the present invention;
FIG. 4 is a schematic diagram of a battery control circuit according to the present invention;
FIG. 5 is a schematic diagram of a boost circuit according to the present invention;
FIG. 6 is a schematic circuit diagram of a controller according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
The invention provides a power supply automatic control system and method for CT power taking, and aims to solve the problem that dead zones exist in discharging in inductive energy supply of a current transformer 6.
Referring to fig. 1, a first embodiment of the present invention provides an automatic power control system for CT power supply, which includes a CT power supply circuit 3, a bleeder circuit 4, a controller 1, a battery control circuit 2, and an energy storage unit 5 connected to the battery control circuit 2; the circuit schematic diagram of the controller is shown in fig. 6.
The input of CT can be got circuit 3 is used for being connected to mutual-inductor 6, bleeder circuit 4's output is in CT can be got circuit 3's input, bleeder circuit 4's input and battery control circuit 2's input is connected CT can be got circuit 3's output, controller 1 with CT can be got circuit 3, bleeder circuit 4 and battery charging control circuit electrical connection.
In the prior art, the bleeder circuit 4 is disposed at the rear end of the rectifier circuit 31, and since the bleeder ground and the MCU ground are the same, switching operation is often performed when MOS is bled, a spike voltage may be generated at the moment of the switching operation, which may cause a certain damage to the input voltage boosting chip, and over-energy may cause instability of the device due to a certain risk after a long time.
In this embodiment, the output end of the bleeder circuit 4 is connected to the input end of the CT energy obtaining circuit 3, and when the controller 1 acquires that the voltage of the super capacitor C37 of the CT energy obtaining circuit 3 is greater than a preset value, the ac power is short-circuited, specifically, the coil of the transformer 6 may be output by 200 pounds, the ac power may be short-circuited together by using a triac, which is equivalent to short-circuiting the coil 200 together, and at this time, the coil is similarly changed into a closed-loop conductor, so that instability of a device due to the bleeder circuit can be effectively avoided.
As shown in fig. 2, in the present embodiment, the CT energy obtaining circuit 3 includes: the voltage-sensitive resistor R92, the rectifying circuit 31, the voltage-stabilizing diode D9, the filtering circuit 32, the super capacitor C37 and the first voltage-dividing circuit 33;
wherein the resistor is connected across the access terminal, the rectifying circuit 31 is electrically connected across the voltage dependent resistor R92, the zener diode D9 is connected across the rectifying circuit 31, the smoothing circuit 32 is connected across the zener diode D9, the output terminal of the smoothing circuit 32 is electrically connected to the input terminal of the first voltage division circuit, and the super capacitor C37 is connected across the first voltage division circuit, and the output terminal of the first voltage division circuit is electrically connected to the input terminal of the controller 1.
It should be noted that the access terminal includes that three terminals J11, J12, 13 are all mutual-inductor 6 input interfaces, through getting the principle that the magnetism of electric CT mutual-inductor 6 generates electricity, the input is alternating voltage, piezo-resistor R92, as the first order circuit guard action, prevents the damage that the surge voltage caused the system. The ac voltage is full-wave rectified by the rectifying circuit 31 (composed of, but not limited to, D5, D6, D14, and D21), and the filtering circuit 32 (composed of, but not limited to, CD1, CD2, and CD 3) can filter the super capacitor C37 and output a smooth dc current to the subsequent stage, wherein the filtering circuit 32 also has an important function, and the formed capacitor thereof plays a role of energy buffer. The zener diode D9 may be a 5.5V zener diode, which stabilizes voltage of the circuit to play a role in protection, in this embodiment, the first voltage dividing circuit 33 (which is composed of R85 and R91, but is not limited thereto) is configured to collect voltage for the super capacitor C37, where the resistor R85 and the resistor R91 divide voltage of the super capacitor C37, the detection port of the controller 1 performs AD conversion on the voltage to obtain a correspondingly set voltage, so as to obtain a current state of the super capacitor C37, and the controller 1 may operate the system in a full function mode, a partial function mode, and a sleep mode according to a current voltage value of the capacitor; when the voltage of the super capacitor C37 is greater than 4.5V, the super capacitor C37 supplies power to the electric equipment and the energy storage unit 5 at the same time, namely, the super capacitor C37 and the energy storage unit 5 are in a full-function mode at the moment, when the voltage of the super capacitor C37 is greater than 2V, the super capacitor C37 and the energy storage unit 5 alternately supply power to the electric equipment, namely, the super capacitor C37 is less than 2V and the voltage of the energy storage unit 5 is greater than 2.8V, and the energy storage unit 5 independently supplies power to the equipment.
As shown in fig. 3, in the present embodiment, the bleeding circuit 4 includes: a second voltage division circuit 44, a first capacitor C64, a comparison circuit 43, a photoelectric isolation circuit 42, and an absorption circuit 41;
the first capacitor C64 is also connected to the second voltage-dividing circuit, the second voltage-dividing circuit 44 is electrically connected to the input terminal of the comparison circuit 43, the output terminal of the comparison circuit 43 is electrically connected to the input terminal of the optoelectronic isolation circuit 42, the output terminal of the optoelectronic isolation circuit is electrically connected to the control terminal of the absorption circuit, and the absorption circuit is also connected to the input terminal of the CT energy-taking circuit 3.
It should be noted that the bleeder circuit 4 mainly detects the voltage in a hardware manner, compares the detected voltage with a voltage comparator, and outputs a level. The silicon controlled switch is controlled to make the input alternating voltage short-circuit and be in 0 power state so as to achieve the effect of energy release and protect the circuit from being damaged.
The comparison circuit 43 of the bleeder circuit 4 is mainly composed of a voltage comparator U10 and a transistor Q14, and the voltage Uc of the first capacitor C64 is the non-inverting input voltage of U10. The photoelectric isolation circuit 42 can be a photoelectric coupler MOC3021, can be used as a photoelectric isolation trigger of a high-power silicon controlled rectifier, has the maximum isolation voltage of 7500V, can effectively realize the electrical isolation between a control circuit and the secondary side of the CT, and ensures the safety of each circuit module of the power supply. The resistors R107 and R93 are protection resistors at the instant when the photothyristor inside the photoelectric coupler MOC3021 is turned on, and divide the secondary side voltage of the CT after the protection resistors are turned on to provide a trigger signal for the B TA 61. R155 and C29 connected in parallel with BTA61 constitute a RC absorption circuit 41 for absorbing the peak voltage at the turn-on moment. The second voltage dividing circuit 44 (composed of R142 and R143, but not limited thereto) divides the voltage of the first capacitor C64, and the negative feedback terminal of the voltage comparator U10 is set to 3.8V. The voltage at the positive feedback end of the voltage comparator is determined by the divider resistance of the second divider circuit 44. In the present embodiment, an ultra-low capacitance of 5.5V is preferably used. Therefore, the protection value cannot be higher than the voltage Ucsat (5.5V). When the input voltage Uc is greater than Ucsat (5.5V), U10 outputs high level, the triode Q14 changes from cut-off state to conducting state, the light emitting diode of the photoelectric coupler MOC3021 is connected with the power supply and conducted, the photosensitive controlled silicon receives the light signal and conducts, the G pole of BTA61 triggers and conducts, the secondary side of CT is close to short circuit, the output power is 0, the load is powered by the super capacitor C37 and the voltage Uc of the first capacitor C64 is reduced; when the capacitor voltage is reduced to Uc < Ucsat (5.5V), the circuit working process is opposite to that of Uc > Ucsat (5.5V), at the moment, the G pole trigger signal of the BTA61 disappears, but the G pole trigger signal is not immediately turned off due to the zero-crossing turn-off characteristic of the bidirectional thyristor, but is turned off when secondary current flowing through the bidirectional thyristor flows through 0, at the moment, the CT secondary side is connected into the circuit again, the super capacitor C37 is charged and supplies energy to the load, the Uc is further increased, and the process is repeated after Uc > Ucsat (5.5V). Therefore, the thyristor is conducted once in each half period according to the change of the Uc, and the Uc (5.5V) can be basically kept unchanged under the condition of primary large current, so that the CT output and the load power are balanced.
As shown in fig. 4, in the present embodiment, the battery control circuit 2 includes: a first switch circuit 21, a charging circuit 22, a second switch circuit 24, a third voltage division circuit 23, and a second capacitor C35;
the control end of the first switch circuit 21 is electrically connected to the output end of the controller 1, the output end of the CT energy-taking circuit 3 is electrically connected to the input end of the charging circuit 22 through the first switch circuit, the output end of the charging circuit 22 is electrically connected to the energy storage unit 5, the energy storage unit 5 is connected to the electric equipment through the second switch circuit 24, the output end of the energy storage unit 5 is electrically connected to the third voltage division circuit 23, and the second capacitor C35 is on the third voltage division circuit 23.
It should be noted that when the controller 1 detects that the voltage of the super capacitor C37 is greater than 4.5V, the output terminal of the controller 1 outputs a high level, that is, the pin VSUP is pulled high, so that Q7 is turned on, and U11 is also turned on, at this time, the energy of the rectifying circuit will simultaneously charge the energy storage unit 5. The third voltage dividing circuit 23 (composed of R79 and R84, but not limited thereto) is a voltage dividing circuit of the energy storage unit 5. The voltage condition of the energy storage unit 5 is detected, and the controller 1 operates different modes according to the electric quantity of the energy storage unit 5. Full function mode, partial function mode, and sleep mode.
As shown in fig. 5, in the present embodiment, the method further includes: a booster circuit 7;
the first input end of the boosting loop is electrically connected with the output end of the CT energy obtaining circuit 3, the second input end of the boosting loop is electrically connected with the output end of the battery control circuit 2, and the output end of the boosting loop is used for being connected with electric equipment.
In this embodiment, the boost circuit is used to boost the output voltage of the CT energy-taking circuit 3 or the output voltage of the energy storage power supply.
A second embodiment of the present invention provides a control method based on any one of the above, including:
the controller 1 acquires a first voltage value of an ultra-capacitor C37 on the CT energy-taking circuit 3;
the controller 1 controls the CT energy taking circuit 3 and the battery control circuit 2 to supply energy to the electric equipment according to the first voltage value.
Preferably, according to the first voltage value, the CT energy obtaining circuit 3 and the battery control circuit 2 are controlled to supply energy to the electric device, specifically:
when the controller 1 judges that the first voltage value is greater than a first preset value, the CT energy taking circuit 3 is controlled to charge the energy storage unit 5 and supply energy to the electric equipment;
when the controller 1 determines that the first voltage value is between the first preset value and the second preset value, the CT energy obtaining circuit 3 and the battery control circuit 2 are controlled to alternately supply energy to the electric equipment.
Preferably, the method further comprises the following steps:
the controller 1 acquires a second voltage value of the energy storage unit 5, and controls the battery control circuit 2 to supply energy to the electric equipment independently when the second voltage value is judged to be larger than a third preset value and the first voltage value is lower than the second preset value.
Preferably, when the bleeder circuit 4 determines that the value of the first capacitor C64 exceeds the preset threshold, the bleeder circuit shorts the input terminal of the CT energy obtaining circuit 3 to turn off the output power of the CT energy obtaining circuit 3.
Based on the automatic control system and the method for the power supply of the CT power taking, provided by the invention, the bleeder circuit 4 collects the voltage value of the first capacitor C64, when the voltage value of the first capacitor C64 is judged to be larger than the protection voltage, the CT power taking circuit 3 is in short circuit, so that the power output by the CT power taking circuit 3 is 0, and the interference on the rear-end electric equipment is avoided, the controller 1 collects the voltage value of the super capacitor C37 in the CT power taking circuit 3 and the voltage value of the energy storage unit 5, controls the CT power taking circuit 3 and the battery control circuit 2 to alternately supply power to the electric equipment, so that the inductive power taking electric energy power is always maintained at the maximum output, the electric energy is utilized, and the waste and the heating are reduced.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention.
Claims (9)
1. An automatic power supply control system for CT power taking is characterized by comprising a CT power taking circuit, a bleeder circuit, a controller, a battery control circuit and an energy storage unit connected with the battery control circuit;
the input end of the CT energy obtaining circuit is used for being connected to a mutual inductor, the output end of the bleeder circuit is connected with the input end of the CT energy obtaining circuit, the input end of the bleeder circuit is connected with the input end of the battery control circuit and is connected with the output end of the CT energy obtaining circuit, and the controller is electrically connected with the CT energy obtaining circuit, the bleeder circuit and the battery charging control circuit.
2. The automatic power supply control system for CT power taking according to claim 1, wherein the CT power taking circuit comprises: the voltage-stabilizing circuit comprises an access terminal, a piezoresistor, a rectifying circuit, a voltage-stabilizing diode, a filtering circuit, a super capacitor and a first voltage-dividing circuit;
the resistor is arranged at two ends of the access terminal, the rectifying circuit is electrically connected with two ends of the voltage dependent resistor, the voltage stabilizing diode is arranged at two ends of the rectifying circuit, the filtering circuit is arranged at two ends of the voltage stabilizing diode, the output end of the filtering circuit is electrically connected with the input end of the first voltage division circuit, the super capacitor is arranged on the first voltage division circuit, and the output end of the first voltage division circuit is electrically connected with the input end of the controller.
3. The automatic power supply control system for CT power taking according to claim 1, wherein the bleeder circuit comprises: the circuit comprises a second voltage division circuit, a first capacitor, a comparison circuit, a photoelectric isolation circuit and an absorption circuit;
the first capacitor is arranged on the second voltage division circuit, the second voltage division circuit is electrically connected with the input end of the comparison circuit, the output end of the comparison circuit is electrically connected with the input end of the photoelectric isolation circuit, the output end of the photoelectric isolation circuit is electrically connected with the control end of the absorption circuit, and the absorption circuit is arranged at the input end of the CT energy-taking circuit.
4. The automatic power supply control system for CT power taking according to claim 1, wherein the battery control circuit comprises: the charging circuit comprises a first switch loop, a charging loop, a second switch loop, a third voltage division loop and a second capacitor;
the control end of the first switch loop is electrically connected with the output end of the controller, the output end of the CT energy taking circuit is electrically connected with the input end of the charging loop through the first switch circuit, the output end of the charging loop is electrically connected with the energy storage unit, the energy storage unit is connected to electric equipment through the second switch loop, the output end of the energy storage unit is electrically connected with the third voltage division loop, and the second capacitor is arranged on the third voltage division loop.
5. The automatic power supply control system for CT power taking according to claim 1, further comprising: a boost circuit;
the first input end of the boosting loop is electrically connected with the output end of the CT energy obtaining circuit, the second input end of the boosting loop is electrically connected with the output end of the battery control circuit, and the output end of the boosting loop is used for being connected with electric equipment.
6. A control method according to any one of claims 1 to 5, comprising:
the controller acquires a first voltage value of a super capacitor on the CT energy acquisition circuit;
the controller controls the CT energy taking circuit and the battery control circuit to supply energy to electric equipment according to the first voltage value.
7. The automatic power control method for CT power taking according to claim 6, wherein the CT power taking circuit and the battery control circuit are controlled to supply power to electric equipment according to the first voltage value, and specifically the method comprises the following steps:
when the controller judges that the first voltage value is larger than a first preset value, the CT energy taking circuit is controlled to charge the energy storage unit, and meanwhile, energy is supplied to electric equipment;
and when the controller judges that the first voltage value is between the first preset value and the second preset value, the CT energy taking circuit and the battery control circuit are controlled to alternately supply energy to the electric equipment.
8. The automatic control method for the power supply for CT power taking according to claim 7, further comprising:
the controller obtains a second voltage value of the energy storage unit, and controls the battery control circuit to supply energy to the electric equipment independently when the second voltage value is judged to be larger than a third preset value and the first voltage value is lower than the second preset value.
9. The automatic control method for the power supply of the CT power taking according to claim 7, wherein when the bleeder circuit judges that the value of the first capacitor exceeds the preset threshold, the input end of the CT power taking circuit is short-circuited to turn off the output power of the CT power taking circuit.
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| CN116317058A (en) * | 2023-05-15 | 2023-06-23 | 北京国电通网络技术有限公司 | Intelligent monitoring device and intelligent power supply control method |
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