CN113162184B - Automatic power supply control system for CT power taking - Google Patents
Automatic power supply control system for CT power taking Download PDFInfo
- Publication number
- CN113162184B CN113162184B CN202110481028.1A CN202110481028A CN113162184B CN 113162184 B CN113162184 B CN 113162184B CN 202110481028 A CN202110481028 A CN 202110481028A CN 113162184 B CN113162184 B CN 113162184B
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- energy
- input end
- taking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004146 energy storage Methods 0.000 claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims description 46
- 238000002955 isolation Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 230000001419 dependent effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 238000003306 harvesting Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 230000006698 induction Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides an automatic power supply control system and method for CT power taking, 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 taking circuit is used for being connected to the transformer, the output end of the bleeder circuit is connected with the input end of the CT energy taking circuit, the input end of the bleeder circuit is connected with the input end of the battery control circuit is connected with the output end of the CT energy taking circuit, and the controller is electrically connected with the CT energy taking circuit, the bleeder circuit and the battery charging control circuit, so that the problem that dead zones exist in induction energy supply of the current transformer in a bleeder mode is solved.
Description
Technical Field
The invention relates to the field of electromagnetic induction, in particular to an automatic power supply control system and method for CT power taking.
Background
Smart grids have become a new trend in world grid development. In face of new situation and new challenges, the national grid company proposes a firm intelligent grid strategic target for accelerating construction, taking extra-high voltage as a backbone grid frame, developing new energy as a low-carbon direction, and coordinating development of all levels of grids, wherein the informatization, automation and interaction are characterized by the strategy target. In the whole intelligent power grid architecture, a high-voltage power transmission line is a very important ring, and takes on the task of sending electric energy generated by a power plant to tens of millions of users, once the electric energy fails, the electric energy can generate an influence which is difficult to measure, so that monitoring equipment on the power transmission line is needed; along 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 the prior art, the detection equipment is more in power supply mode, firstly, the equipment is powered by a battery, the principle of battery power supply is to convert chemical energy into electric energy, the detection equipment is stable, if the detection equipment is applied to a high-power occasion, the service life of the battery is shorter, the detection equipment is often inconvenient to replace at a high-voltage side, and the cost is increased cumulatively.
Secondly, solar energy supply: the mode is influenced by overcast and rainy days, night and air quality, the power supply system is easy to get insufficient power, and the terminal cannot be supported to run for a long time.
Thirdly, the current transformer inducts energy supply (CT electricity taking): the minimum power taking of the high-voltage cable is 9A, the CT power taking efficiency is low and easy to magnetically saturate due to the fact that the minimum power taking of the high-voltage cable is easily affected by the fluctuation of the power transmission line current, and the power taking of the power transmission line cannot be automatically adjusted and protected, so that the reasonable power discharging mode and the optimization of a power supply energy supply dead zone are the technical points to be broken through at present.
Fourth, the disadvantage of this scheme of low-voltage side energy supply (laser power supply) is mainly, the cost is high, and output is little, and the life-span is limited, is easily influenced by ambient temperature. Fifth electric field coupling energy supply: the energy supply scheme has the advantages of simple circuit, lower cost, poor safety, consideration of a standby power supply, increased complexity of the system, influence on the stability of the power supply due to various factors such as temperature, stray capacitance and the like, and reduction of the reliability of the power supply.
In view of this, the present application has been proposed.
Disclosure of Invention
The invention provides an automatic control system and method for a CT power supply, and aims to solve the problem that dead zones exist in discharge in induction energy supply of a current transformer.
The first embodiment of 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;
The input end of the CT energy taking circuit is used for being connected to the transformer, the output end of the bleeder circuit is connected with the input end of the CT energy taking circuit, the input end of the bleeder circuit and the input end of the battery control circuit are connected with the output end of the CT energy taking circuit, and the controller is electrically connected with the CT energy taking circuit, the bleeder circuit and the battery charging control circuit.
Preferably, the CT energy extraction circuit includes: 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 voltage-dependent resistor is arranged at two ends of the access terminal, the rectifying circuit is electrically connected at 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-dividing circuit, the super capacitor is arranged on the first voltage-dividing circuit, and the output end of the first voltage-dividing circuit is electrically connected with the input end of the controller.
Preferably, the bleeder circuit comprises: the device comprises a second voltage dividing circuit, a first capacitor, a comparison loop, 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 first switch loop, the charging loop, the second switch loop, the third voltage division loop and the second capacitor;
The control end of the first switch circuit 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 circuit through the first switch circuit, the output end of the charging circuit is electrically connected with the energy storage unit, the energy storage unit is connected to electric equipment through the second switch circuit, the output end of the energy storage unit is electrically connected with the third voltage dividing circuit, and the second capacitor is arranged on the third voltage dividing circuit.
Preferably, the method further comprises: a boost circuit;
The first input end of the boosting circuit is electrically connected with the output end of the CT energy taking circuit, the second input end of the boosting circuit is electrically connected with the output end of the battery control circuit, and the output end of the boosting circuit 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-taking circuit;
And the controller controls the CT energy taking circuit and the battery control circuit to supply energy to the electric equipment according to the first voltage value.
Preferably, the controlling the CT energy-taking circuit and the battery control circuit to power the electric equipment according to the first voltage value specifically includes:
When the controller judges that the first voltage value is larger than a first preset value, the controller controls the CT energy-taking circuit to charge the energy storage unit and simultaneously supplies energy 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 controller controls the CT energy taking circuit and the battery control circuit to alternately supply energy to the electric equipment.
Preferably, the method further comprises:
The controller obtains a second voltage value of the energy storage unit, and controls the battery control circuit to independently supply energy to the electric equipment when judging that the second voltage value is larger than a third preset value and the first voltage value is lower than the second preset value.
Preferably, when the bleeder circuit judges that the value of the first capacitor exceeds a preset threshold value, the input end of the CT energy taking circuit is short-circuited so as to cut off the output power of the CT energy taking circuit.
According to the automatic control system and method for the power supply for CT power taking provided by the invention, the bleeder circuit collects the voltage value of the first capacitor of the bleeder circuit, when the voltage value of the first capacitor is judged to be larger than the protection voltage, the CT power taking circuit is short-circuited so that the power output by the CT power taking circuit is 0, the interference to electric equipment at the rear end is avoided, the controller collects the voltage value of the super capacitor in the CT power taking circuit and the voltage value of the energy storage unit, and controls the CT power taking circuit and the battery control circuit to alternately supply power to the electric equipment, so that the induction power taking electric energy power is always maintained at the maximum output, the electric energy is utilized, and the waste and the heat are reduced.
Drawings
Fig. 1 is a schematic block diagram of an automatic power supply control system for CT power taking according to the present invention.
FIG. 2 is a schematic diagram of a CT energy-capturing circuit provided by the present invention;
FIG. 3 is a schematic diagram of a bleeder circuit provided by the present invention;
FIG. 4 is a schematic diagram of a battery control circuit provided by the present invention;
FIG. 5 is a schematic diagram of a boost circuit provided by the present invention;
Fig. 6 is a schematic circuit diagram of a controller according to the present invention.
Detailed Description
For the purpose of making 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 clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as 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, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The invention provides an automatic control system and method for a CT power supply, and aims to solve the problem that dead zones exist in the discharging process in the induction energy supply of a current transformer 6.
Referring to fig. 1, a first embodiment of the present invention provides an automatic power supply control system for CT power taking, which includes a CT power taking 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 schematic circuit diagram of the controller is shown in fig. 6.
The input end of the CT energy taking circuit 3 is used for being connected to a transformer 6, the output end of the bleeder circuit 4 is connected with the input end of the CT energy taking circuit 3, the input end of the bleeder circuit 4 and the input end of the battery control circuit 2 are connected with the output end of the CT energy taking circuit 3, and the controller 1 is electrically connected with the CT energy taking circuit 3, the bleeder circuit 4 and the battery charging control circuit.
In the prior art, the bleeder circuit 4 is configured at the rear end of the rectifying circuit 31, and since the bleeder ground and the MCU ground are together, the MOS bleeder will often have a switching action, and at the moment of the switching action, a spike voltage will sometimes be generated, and there is a certain damage to the input boost chip, and a certain risk will be caused to cause the energy to be too large for a long time, so that the device is unstable.
In this embodiment, when the controller 1 collects that the voltage of the super capacitor C37 of the CT energy capturing circuit 3 is greater than the preset value, the output end of the bleeder circuit 4 and the input end of the CT energy capturing circuit 3 are in short circuit with the alternating current, specifically, the coil of the transformer 6 may be output by smashing 200, and the alternating current may be shorted together by using a bidirectional thyristor, which is equivalent to smashing the coil 200 together, and the coil is similarly turned into a closed loop conductor at this time, so that instability of the device caused by bleeding can be effectively avoided.
As shown in fig. 2, in the present embodiment, the CT power-up circuit 3 includes: the voltage regulator comprises an access terminal, a piezoresistor R92, a rectifying circuit 31, a voltage-stabilizing diode D9, a filtering circuit 32, a super capacitor C37 and a first voltage-dividing circuit 33;
The resistor is further disposed at two ends of the access terminal, the rectifying circuit 31 is electrically connected to two ends of the piezoresistor R92, the zener diode D9 is further disposed at two ends of the rectifying circuit 31, the filtering circuit 32 is further disposed at two ends of the zener diode D9, an output end of the filtering circuit 32 is electrically connected to an input end of the first voltage dividing circuit, the super capacitor C37 is further disposed on the first voltage dividing circuit, and an output end of the first voltage dividing circuit is electrically connected to an input end of the controller 1.
It should be noted that, the access terminal includes three terminals of J11, J12, and J13, which are all input interfaces of the transformer 6, and input ac voltage through the principle of magnetic electricity generation of the power-taking CT transformer 6, and the piezoresistor R92 is used as a primary circuit protection function to prevent the damage of the surge voltage to the system. The ac voltage is rectified through the full wave of the rectifying circuit 31 (including but not limited to D5, D6, D14, and D21), the filtering circuit 32 (including but not limited to CD1, CD2, and CD 3) may filter the super capacitor C37, and may output a smooth dc current to the subsequent stage, where the filtering circuit 32 has an important role, and the capacitor formed by the filtering circuit plays a role of energy buffering. The zener diode D9 may be a 5.5V zener diode, which performs a voltage stabilizing function on the circuit, so as to play a role in protecting the circuit, in this embodiment, the first voltage dividing circuit 33 (including R85 and R91, but not limited thereto) is configured to collect a voltage for the supercapacitor C37, where the resistor R85 and the resistor R91 divide the voltage for the supercapacitor C37, the detection port of the controller 1 performs AD conversion on the voltage to obtain a voltage set correspondingly, so as to obtain a current state of the supercapacitor 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, is in a full-function mode, when the voltage of the super capacitor C37 is greater than 2V, the super capacitor C37 and the energy storage unit 5 supply power to the electric equipment alternately, namely, is in a partial function mode, and when the voltage of the super capacitor C37 is less than 2V and the voltage of the energy storage unit 5 is greater than 2.8V, the energy storage unit 5 supplies power to the equipment independently.
As shown in fig. 3, in the present embodiment, the bleeder circuit 4 includes: a second voltage dividing 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 on the second voltage dividing circuit, the second voltage dividing circuit 44 is electrically connected to the input end of the comparison circuit 43, the output end of the comparison circuit 43 is electrically connected to the input end of the optoelectronic isolation circuit 42, the output end of the optoelectronic isolation circuit 42 is electrically connected to the control end of the absorption circuit, and the absorption circuit is further connected to the input end of the CT energy-taking circuit 3.
It should be noted that, the bleeder circuit 4 mainly detects voltage in a hardware manner, and then compares the detected voltage with a voltage comparator to output a level to control the thyristor switch, so that the input ac voltage is shorted and is in a 0 power state, thereby achieving the energy bleeder effect and protecting the circuit from damage.
The comparison circuit 43 of the bleeder circuit 4 is formed by taking a voltage comparator U10 and a triode Q14 as cores, 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 a maximum isolation voltage of up to 7500V, can effectively realize the electrical isolation between a control circuit and a CT secondary side, and ensures the safety of each circuit module of a power supply. The resistors R107 and R93 are protection resistors at the moment of switching on the photosensitive thyristors in the photoelectric coupler MOC3021, and after the protection resistors are switched on, the voltage of the CT secondary side is divided to provide a trigger signal for B TA 61. R155 and C29 connected in parallel with BTA61 form a resistance-capacitance absorption circuit 41 for absorbing peak voltage at the moment of opening. The second voltage dividing circuit 44 (including, but not limited to, R142 and R143) divides the first capacitor C64 by 3.8V at the present time. The voltage at the positive feedback end of the voltage comparator is determined by the voltage dividing resistance of the second voltage dividing circuit 44. In this embodiment, an ultra low capacitance of 5.5V is preferably used. So its protection value cannot be higher than the voltage Ucsat (5.5V). If the primary current is large enough, the circuit works as follows, when the input voltage Uc > Ucsat (5.5V), U10 outputs high level, triode Q14 is turned from off state to on state, the light emitting diode of photoelectric coupler MOC3021 is connected to power supply and light signal is received by light-sensitive silicon to turn on, the G pole of BTA61 is triggered to turn on, the CT secondary side is close to short circuit, the output power is 0, load is powered by super capacitor C37 to reduce the voltage Uc of first capacitor C64, when the capacitor voltage is reduced to Uc < Ucsat (5.5V), the circuit works as the contrary to Uc > Ucsat (5.5V), the G pole triggering signal of BTA61 disappears, but due to zero crossing turn-off characteristic of the two-way silicon, the light emitting diode is not turned off immediately, when the secondary current flowing through the light emitting diode passes 0, the CT secondary side is re-connected to the circuit to charge super capacitor C37 and power load, uc is increased, and after Uc is repeated after Uc > Ucsat (5.5V). It can be seen that the thyristor is turned on once in each half cycle according to the change of Uc, and can basically maintain uc= Ucsat (5.5V) unchanged under the condition of large current once, and balance the CT output and the load power.
As shown in fig. 4, in the present embodiment, the battery control circuit 2 includes: a first switching circuit 21, a charging circuit 22, a second switching circuit 24, a third voltage dividing circuit 23, and a second capacitor C35;
The control end of the first switch circuit 21 is electrically connected with the output end of the controller 1, the output end of the CT energy-taking circuit 3 is electrically connected with the input end of the charging circuit 22 through the first switch circuit, the output end of the charging circuit 22 is electrically connected with the energy storage unit 5, the energy storage unit 5 is connected to electric equipment through the second switch circuit 24, the output end of the energy storage unit 5 is electrically connected with the third voltage dividing circuit 23, and the second capacitor C35 is also on the third voltage dividing circuit 23.
It should be noted that, when the controller 1 detects that the voltage of the supercapacitor C37 is greater than 4.5V, the output terminal of the controller 1 outputs a high level, that is, the pin of VSUP is pulled high, so that Q7 is turned on, and U11 is also turned on, and at this time, the energy of the rectifying circuit charges the energy storage unit 5 at the same time. The third voltage dividing circuit 23 (which is composed of R79 and R84, but is 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 in different modes according to the amount of power of the energy storage unit 5. Full function mode, partial function mode, and sleep mode.
As shown in fig. 5, in the present embodiment, further including: a booster circuit 7;
the first input end of the boost circuit is electrically connected with the output end of the CT energy taking circuit 3, the second input end of the boost circuit is electrically connected with the output end of the battery control circuit 2, and the output end of the boost circuit is used for being connected with electric equipment.
In this embodiment, the boost circuit is configured to boost the output voltage of the CT energy-capturing circuit 3 or boost 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 obtains a first voltage value of a super 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, the controlling the CT power-taking circuit 3 and the battery control circuit 2 to power the electric device according to the first voltage value specifically includes:
When the controller 1 judges that the first voltage value is larger than a first preset value, the CT energy-taking circuit 3 is controlled to charge the energy storage unit 5, and meanwhile, the electric equipment is powered;
when the controller 1 judges that the first voltage value is between the first preset value and the second preset value, the CT energy taking circuit 3 and the battery control circuit 2 are controlled to alternately supply energy to the electric equipment.
Preferably, the method further comprises:
The controller 1 obtains a second voltage value of the energy storage unit 5, and controls the battery control circuit 2 to independently supply energy to the electric equipment when judging that the second voltage value is 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 input end of the CT power-taking circuit 3 is shorted, so as to turn off the output power of the CT power-taking circuit 3.
According to the automatic control system and method for the power supply for CT power taking provided by the invention, the bleeder circuit 4 collects the voltage value of the first capacitor C64 of the bleeder circuit, 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 short-circuited, so that the power output by the CT power taking circuit 3 is 0, the interference to electric equipment at the rear end 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, and the CT power taking circuit 3 and the battery control circuit 2 are controlled to alternately supply power to the electric equipment, so that the induction power taking electric energy power is always maintained at the maximum output, the electric energy is utilized, and the waste and the heat 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 examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention.
Claims (3)
1. The power supply automatic control system for CT electricity taking is characterized by comprising a CT energy 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 taking circuit is used for being connected to the transformer, the output end of the bleeder circuit is connected with the input end of the CT energy taking circuit, the input end of the bleeder circuit is connected with the input end of the battery control circuit, the input end of the battery control circuit is connected with the output end of the CT energy taking circuit, and the controller is electrically connected with the CT energy taking circuit, the bleeder circuit and the battery charging control circuit;
The bleeder circuit includes: the device comprises a second voltage dividing circuit, a first capacitor, a comparison loop, 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;
When the value of the first capacitor exceeds a preset threshold value, the bleeder circuit is in short circuit with the input end of the CT energy taking circuit to cut off the output power of the CT energy taking circuit, when the value of the first capacitor is lower than the preset threshold value and when the secondary current of the bidirectional thyristor flowing through the absorption circuit passes through 0, the bleeder circuit is cut off, and the CT energy taking circuit is connected again;
the controller acquires a first voltage value of a super capacitor on the CT energy-taking circuit;
The controller controls the CT energy taking circuit and the battery control circuit to supply energy to the electric equipment according to the first voltage value; wherein, specifically, it is:
When the controller judges that the first voltage value is larger than a first preset value, the controller controls the CT energy-taking circuit to charge the energy storage unit and simultaneously supplies energy to electric equipment;
When the controller judges that the first voltage value is between the first preset value and the second preset value, the controller controls the CT energy taking circuit and the battery control circuit to alternately supply energy to the electric equipment;
The controller acquires a second voltage value of the energy storage unit, and controls the battery control circuit to independently supply power to the electric equipment when judging that the second voltage value is larger than a third preset value and the first voltage value is lower than the second preset value;
the battery control circuit includes: the first switch loop, the charging loop, the second switch loop, the third voltage division loop and the second capacitor;
The control end of the first switch circuit 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 circuit through the first switch circuit, the output end of the charging circuit is electrically connected with the energy storage unit, the energy storage unit is connected to electric equipment through the second switch circuit, the output end of the energy storage unit is electrically connected with the third voltage dividing circuit, and the second capacitor is arranged on the third voltage dividing circuit.
2. The automatic power control system for CT power up according to claim 1, wherein said CT power up 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 voltage-dependent resistor is arranged at two ends of the access terminal, the rectifying circuit is electrically connected at 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-dividing circuit, the super capacitor is arranged on the first voltage-dividing circuit, and the output end of the first voltage-dividing circuit is electrically connected with the input end of the controller.
3. The automatic power control system for CT power harvesting of claim 1, further comprising: a boost circuit;
The first input end of the boosting circuit is electrically connected with the output end of the CT energy taking circuit, the second input end of the boosting circuit is electrically connected with the output end of the battery control circuit, and the output end of the boosting circuit is used for being connected with electric equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110481028.1A CN113162184B (en) | 2021-04-30 | 2021-04-30 | Automatic power supply control system for CT power taking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110481028.1A CN113162184B (en) | 2021-04-30 | 2021-04-30 | Automatic power supply control system for CT power taking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113162184A CN113162184A (en) | 2021-07-23 |
| CN113162184B true CN113162184B (en) | 2024-04-23 |
Family
ID=76872788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110481028.1A Active CN113162184B (en) | 2021-04-30 | 2021-04-30 | Automatic power supply control system for CT power taking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113162184B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116317058B (en) * | 2023-05-15 | 2023-07-28 | 北京国电通网络技术有限公司 | Intelligent monitoring device and intelligent power supply control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203481916U (en) * | 2013-04-15 | 2014-03-12 | 国家电网公司 | Novel high voltage line CT electricity taking device |
| CN103887899A (en) * | 2013-12-16 | 2014-06-25 | 重庆大学 | Induction energy taking power source of electric transmission line monitoring device |
| CN206117261U (en) * | 2016-08-24 | 2017-04-19 | 深圳市惠立智能电力科技有限公司 | Self -adaptation CT induction electricity -taking's power control system |
| CN208142906U (en) * | 2018-05-29 | 2018-11-23 | 深圳市嘉创达电源科技有限公司 | A kind of CT electricity getting device |
| CN110601569A (en) * | 2019-10-29 | 2019-12-20 | 许继电气股份有限公司 | Current transformer gets electric circuit |
| CN215181476U (en) * | 2021-04-30 | 2021-12-14 | 厦门四信智慧电力科技有限公司 | Automatic power supply control system for CT power taking |
-
2021
- 2021-04-30 CN CN202110481028.1A patent/CN113162184B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203481916U (en) * | 2013-04-15 | 2014-03-12 | 国家电网公司 | Novel high voltage line CT electricity taking device |
| CN103887899A (en) * | 2013-12-16 | 2014-06-25 | 重庆大学 | Induction energy taking power source of electric transmission line monitoring device |
| CN206117261U (en) * | 2016-08-24 | 2017-04-19 | 深圳市惠立智能电力科技有限公司 | Self -adaptation CT induction electricity -taking's power control system |
| CN208142906U (en) * | 2018-05-29 | 2018-11-23 | 深圳市嘉创达电源科技有限公司 | A kind of CT electricity getting device |
| CN110601569A (en) * | 2019-10-29 | 2019-12-20 | 许继电气股份有限公司 | Current transformer gets electric circuit |
| CN215181476U (en) * | 2021-04-30 | 2021-12-14 | 厦门四信智慧电力科技有限公司 | Automatic power supply control system for CT power taking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113162184A (en) | 2021-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201185355Y (en) | High voltage line induction electricity-taking apparatus | |
| US7598703B2 (en) | Portable chargers having power factor correction capability for use with electric vehicles | |
| CN103123882B (en) | Intelligent controller of bistable permanent-magnet vacuum circuit breaker | |
| CN100566075C (en) | Explosive gas atmosphere is with the uninterrupted D.C. regulated power supply of essential safe type | |
| CN107394864A (en) | A kind of accumulator of electric car charging and discharging state monitoring system | |
| CN111436174A (en) | High-efficient constant current drive power supply equipment | |
| CN215181476U (en) | Automatic power supply control system for CT power taking | |
| CN115509293B (en) | Sonar emission power regulation circuit, system and control method | |
| CN113162184B (en) | Automatic power supply control system for CT power taking | |
| CN111525493A (en) | Thing networking intelligent circuit breaker based on WIFI mode | |
| CN216794664U (en) | Charging circuit and charger | |
| CN114204643A (en) | Intelligent quick charging source | |
| CN117394671A (en) | Energy-taking power supply topology and method for series connection application of energy-taking power supply topology and power module voltage-equalizing resistor | |
| CN202602381U (en) | Power supply device of current transformer | |
| CN202094668U (en) | Intelligent charging device of fire emergency power supply | |
| CN205231837U (en) | Voltage track -hold circuit based on single -phase contravariant | |
| CN117277787A (en) | High-voltage wide-voltage-range input power DC-DC converter and control method | |
| CN218603199U (en) | Wide voltage charging conversion circuit and system | |
| CN215990185U (en) | Overvoltage protection circuit and electrical equipment | |
| CN115940382A (en) | Standby power charging device and vehicle-mounted LCD (liquid Crystal display) play controller standby power system | |
| CN112910267B (en) | High-reliability power module | |
| CN210724225U (en) | Energy storage charge and discharge control module | |
| CN107579560A (en) | A kind of accumulator charging and discharging state detection and monitoring system | |
| CN113452153A (en) | Online energy-taking and power-supplying system for ground wire of overhead transmission line | |
| CN113346731A (en) | Compressor shutdown circuit and method and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |