WO2021227267A1 - Appareil de fusion de glace sur ligne - Google Patents

Appareil de fusion de glace sur ligne Download PDF

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Publication number
WO2021227267A1
WO2021227267A1 PCT/CN2020/108166 CN2020108166W WO2021227267A1 WO 2021227267 A1 WO2021227267 A1 WO 2021227267A1 CN 2020108166 W CN2020108166 W CN 2020108166W WO 2021227267 A1 WO2021227267 A1 WO 2021227267A1
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Prior art keywords
electrically connected
inductor
phase line
reference signal
current
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PCT/CN2020/108166
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English (en)
Chinese (zh)
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周亚兵
唐小亮
杨芳
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广东电网有限责任公司清远供电局
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Publication of WO2021227267A1 publication Critical patent/WO2021227267A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/16—Devices for removing snow or ice from lines or cables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables

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  • This application relates to the technical field of line ice melting, for example, to an online ice melting device.
  • the related technology generally adopts an AC short-circuit ice melting method, which transmits ice-melting current to the line through a medium-voltage power distribution device, and melts the ice on the line by the heat generated by the short-circuit current.
  • this method requires the power outage of the line to proceed during the ice melting period, and the power outage and ice melting will cause huge power outage losses and also affect the safety of the transmission line.
  • the present application provides an online ice melting device, which adjusts the ice melting current of the ice melting line through a controllable current signal or a controllable voltage signal, so as to realize the effect of online ice melting on the transmission line without power outage during ice melting.
  • the embodiment of the application provides an online ice melting device, the device is used for melting ice on a three-phase line, and the device includes: an adjustable reactor, a grounding transformer, a signal generation module, a controller, and an auxiliary circuit;
  • the grounding transformer is electrically connected to the three-phase line and the first end of the adjustable reactor, and the auxiliary circuit is connected to the second end of the adjustable reactor and the first end of the three-phase line. Between any phase line, the grounding transformer, the adjustable reactor, the auxiliary circuit, and any phase line of the three-phase line form a first control loop;
  • the adjustable reactor includes a primary winding and a secondary winding, and the primary winding is connected between the grounding transformer and the auxiliary circuit;
  • the controller is electrically connected to the secondary winding, the signal generation module is electrically connected to the controller, and the signal generation module is used to output a first reference signal, a second reference signal, a third reference signal, and a second reference signal.
  • the controller is configured to generate a first controllable current signal according to the first reference signal and the second reference signal, and adjust the current of the first control loop according to the first controllable current signal, or, according to The third reference signal and the fourth reference signal generate a first controllable voltage signal, and the current of the first control loop is adjusted according to the first controllable voltage signal.
  • the present application provides an online ice melting device, which is used for melting ice on a three-phase line.
  • the device includes: an adjustable reactor, a grounding transformer, a signal generating module, a controller and an auxiliary circuit; wherein the grounding transformer is connected to the grounding transformer respectively.
  • the three-phase line is electrically connected to the first end of the adjustable reactor, the auxiliary circuit is connected between the second end of the adjustable reactor and any phase line of the three-phase line, the grounding transformer, the adjustable reactor, the auxiliary circuit and Any phase circuit of the three-phase circuit forms the first control loop; among them, the adjustable reactor includes a primary winding and a secondary winding, the primary winding is connected between the grounding transformer and the auxiliary circuit; the controller is electrically connected to the secondary winding, and the signal The generating module is electrically connected to the controller. The signal generating module is used to output the first reference signal, the second reference signal, the third reference signal, and the fourth reference signal; the controller is used to generate the first reference signal and the second reference signal.
  • Controllable current signal and adjust the current of the first control loop according to the first controllable current signal, or generate the first controllable voltage signal according to the third reference signal and the fourth reference signal, and adjust according to the first controllable voltage signal
  • the current of the first control loop It can be seen that the first controllable current signal or the first controllable voltage signal is generated by the controller to adjust the current of the first control loop, so as to achieve the effect of online ice melting on the transmission line without power outage during ice melting.
  • FIG. 1 is a schematic structural diagram of an online ice melting device in Embodiment 1 of the present application.
  • FIG. 2 is a schematic diagram of the control principle structure of an adjustable reactor of an online ice melting device in the second embodiment of the present application;
  • Fig. 3 is a schematic structural diagram of an adjustable reactor of an online ice melting device in the second embodiment of the present application
  • FIG. 4 is a T-type equivalent circuit diagram of an online ice melting device in the second embodiment of the present application with the secondary winding parameters equivalent to the primary winding side;
  • Fig. 5 is a schematic structural diagram of the control principle of the adjustable reactor of another online ice melting device in the second embodiment of the present application.
  • Dispatching ice melting method is mainly realized through power dispatching, specifically to change the power flow distribution of the power system, increase the current on the line with icing, and increase the heat of the icing line to melt the ice. This is actually one of the most convenient means of deicing, but because this method has been restricted by conditions such as power equipment such as transformer capacity. The problem cannot be solved fundamentally, so this method can only be applied in the initial stage of line icing, and can only play a pre-determined mitigation effect.
  • AC short circuit ice melting is to install a short-circuit ice-melting wire at a certain point of the transmission line, and then transmit the ice-melting current to the line through the medium-voltage power distribution device, and melt the ice on the line by the heat generated by the short-circuit current.
  • AC short-circuit ice melting method can be divided into three-phase short-circuit ice melting method and two-phase short-circuit ice melting method. This method can operate normally within the preset voltage range, but for circuits with voltage levels of 500kV and above, it is difficult to meet the large-capacity ice melting power supply, so this method is not feasible.
  • DC ice melting method converts AC power to DC power through a converter device, and heats the ice-coated line to melt the ice on the line.
  • DC ice melting usually uses 6-pulse or 12-pulse rectifiers, the 6-pulse rectifiers will introduce the 5th and 7th harmonics, and the 12-pulse rectifiers will introduce the 11th and 13th harmonics.
  • the power generated by the automatic mechanical device is used to destroy the ice on the line, so that the ice can fall off the line.
  • the advantage of this method is that it is convenient and easy to use, but the efficiency is not high and the safety is extremely poor.
  • the communication ice melting technology in related technologies can be roughly divided into the following types:
  • the AC short-circuit current ice melting technology is the most economical and effective, but it is mainly aimed at the main network. Passing through areas with micro-topography and micro-climate that are prone to icing is a difficult point in the prevention and control of ice disasters. In addition, the related current ice melting technology is difficult to directly apply to the anti-icing of the distribution network. The ability of distribution network lines to resist rain, snow and freezing disasters is weak, and it is difficult to ensure the reliability of power supply for users.
  • the present application provides an online ice melting device, which regulates the ice melting current of the ice melting line through a controllable current signal or a controllable voltage signal, so as to realize the effect of online ice melting on the transmission line without power outage during ice melting.
  • FIG 1 is a schematic structural diagram of an online ice melting device provided by Embodiment 1 of the application.
  • the device is used for ice melting on a three-phase line.
  • the device includes: a variable reactor 100, a grounding transformer 200, and a signal Generating module 400, controller 300 and auxiliary circuit 700;
  • the grounding transformer 200 is electrically connected to the three-phase line and the first end of the adjustable reactor 100, and the auxiliary circuit 700 is connected between the second end of the adjustable reactor 100 and any phase line of the three-phase line, and is grounded.
  • the transformer 200, the adjustable reactor 100, the auxiliary circuit 700, and any phase line of the three-phase line form a first control loop 600;
  • the three-phase line includes a first phase line La, a second phase line Lb, and a third phase line Lc
  • the auxiliary circuit 700 is connected between the second end of the adjustable reactor 100 and the third phase line Lc
  • the grounding transformer 200, the adjustable reactor 100, the auxiliary circuit 700 and the third phase line Lc form a first control loop 600.
  • the auxiliary circuit 700 is connected between the second end of the adjustable reactor 100 and the first phase line La, the grounding transformer 200, the adjustable reactor 100, the auxiliary circuit and the first phase line La forms the first control loop 600; it can also be the auxiliary circuit 700 connected between the second end of the adjustable reactor 100 and the second phase line Lb, the grounding transformer 200, the adjustable reactor 100, the auxiliary circuit 700 and the second The phase line Lb forms the first control loop 600.
  • the adjustable reactor 100 includes a primary winding W1 and a secondary winding W2.
  • the primary winding W1 is connected between the grounding transformer 200 and the auxiliary circuit 700; wherein, the second end of the grounding transformer 200 can be used as a regulation point of the transmission line, namely The ice melting current of the power transmission line is adjusted by adjusting the reactance value of the second end of the grounding transformer 200.
  • the controller 300 is electrically connected to the secondary winding W2
  • the signal generating module 400 is electrically connected to the controller 300, and the signal generating module 400 is used to output the first reference signal, the second reference signal, the third reference signal, and the fourth reference signal; wherein ,
  • the signal generating module 400 may be a signal generator.
  • the controller 300 is configured to generate a first controllable current signal according to the first reference signal and the second reference signal, and adjust the current of the first control loop 600 according to the first controllable current signal, or,
  • the first controllable voltage signal is generated according to the third reference signal and the fourth reference signal, and the current of the first control loop 600 is adjusted according to the first controllable voltage signal.
  • adjusting the current of the first control loop 600 according to the first controllable current signal may be: injecting the first controllable current signal into the secondary winding W2 side, so that the reactance on the secondary winding W2 side follows the first controllable current signal
  • the sum of the reactance of the secondary winding W2 converted to the primary winding W1 side and the reactance of the primary winding W1 side also changes accordingly, so that the ice melting current of the transmission line is adjusted accordingly.
  • Adjusting the current of the first control loop 600 according to the first controllable voltage signal can be: injecting the first controllable voltage signal into the secondary winding W2 side, so that the reactance of the secondary winding W2 side follows the change of the first controllable voltage signal The change occurs, so that the sum of the reactance of the secondary winding W2 converted to the primary winding W1 side and the reactance of the primary winding W1 side also changes accordingly, so that the ice melting current of the transmission line is adjusted accordingly.
  • the implementation process of the online ice melting device is as follows: referring to FIG. 1, when the third phase line Lc needs to melt ice, connect the grounding transformer 200 to the three-phase line, which can pass through the third phase line.
  • the switch on Lc controls the connection point D between the third phase line Lc and the auxiliary circuit 700 to be connected, so that the auxiliary circuit 700 is connected between the second end of the adjustable reactor 100 and the third phase line Lc, thereby making grounding
  • the transformer 200, the adjustable reactor 100, and any phase line of the three-phase line form a first control loop 600.
  • the first end of the primary winding W1 of the adjustable reactor 100 is electrically connected to the grounding transformer 200, the second end of the primary winding W1 of the adjustable reactor 100 is electrically connected to the auxiliary circuit 700, the grounding transformer 200, the adjustable reactor 100, The auxiliary circuit 700 and the third phase line Lc form a first control loop 600.
  • the signal generating module 400 is electrically connected to the controller 300, the signal generating module 400 outputs the first reference signal and the second reference signal and sends them to the controller 300, the controller 300 is electrically connected to the secondary winding W2, and the controller 300 according to the first reference
  • the signal and the second reference signal are adjusted to generate a first controllable current signal, and the first controllable current signal is input to the secondary winding W2 side, so that the reactance of the secondary winding W2 side follows the change of the first controllable current signal.
  • the signal generating module 400 outputs the third reference signal and the fourth reference signal and sends them to the controller 300.
  • the controller 300 is electrically connected to the secondary winding W2, and the controller 300 adjusts and generates the second reference signal according to the third reference signal and the fourth reference signal.
  • a controllable voltage signal, and the first controllable voltage signal is input to the secondary winding W2 side, so that the reactance of the secondary winding W2 side changes with the change of the first controllable voltage signal, and the secondary winding W2 is converted into
  • the sum of the reactance to the primary winding W1 side and the reactance on the primary winding W1 side also changes accordingly, thereby controlling the current change of the first control loop 600, that is, generating the first controllable by adjusting the third reference signal and the fourth reference signal
  • the voltage signal adjusts the inductance of the primary winding W1 side, and then adjusts the ice melting current of the third phase line Lc.
  • the first phase line La, the second phase line Lb or other lines need to melt the ice, connect the grounding transformer 200 to the three-phase line through the first phase line La, the second phase line Lb or other lines
  • the upper switch controls the connection point between the corresponding line and the auxiliary circuit 700 to be connected, so that the auxiliary circuit 700 is connected between the second end of the adjustable reactor 100 and the corresponding line to be melted, so that the grounding transformer 200 ,
  • the adjustable reactor 100 and the corresponding line to be melted form a first control loop. Then, according to the above-mentioned realization process, the line to be melted can be melted online.
  • the technical solution of this embodiment provides an online ice melting device, which is used for ice melting of a three-phase line, and the device includes: an adjustable reactor, a grounding transformer, a signal generation module, a controller, and an auxiliary circuit; ,
  • the grounding transformer is electrically connected to the first end of the three-phase line and the adjustable reactor, the auxiliary circuit is connected between the second end of the adjustable reactor and any phase line of the three-phase line, the grounding transformer, the adjustable reactor
  • the first control loop is formed by any phase circuit of the auxiliary circuit and the three-phase circuit; among them, the adjustable reactor includes a primary winding and a secondary winding, and the primary winding is connected between the grounding transformer and the auxiliary circuit; the controller and the secondary The winding is electrically connected, the signal generating module is electrically connected to the controller, the signal generating module is used to output the first reference signal, the second reference signal, the third reference signal and the fourth reference signal; the controller is used to output the first reference signal and the second reference signal according to the
  • the controllable voltage signal regulates the current of the first control loop. It can be seen that the first controllable current signal or the first controllable voltage signal is generated by the controller to adjust the current of the first control loop, which realizes the effect of online ice melting on the transmission line without power outage during ice melting.
  • the grounding transformer 200 includes a first inductor L1, a second inductor L2, and a third inductor L3, a first end of the first inductor L1, a first end of the second inductor L2, and a third inductor L3.
  • the first end of the first end is electrically connected to the first end of the auxiliary circuit 700, the second end of the first inductor L1, the second end of the second inductor L2, and the second end of the third inductor L3 are respectively connected to the adjustable reactor 100
  • the first end is electrically connected, and the second end of the adjustable reactor 100 is grounded.
  • the grounding transformer 200 is used to provide a neutral point for the adjustable reactor 100, and the current of the first control loop is adjusted by adjusting the reactance value at the neutral point through the adjustable reactor, that is, adjusting the ice melting current of the transmission line to realize the power transmission. Online ice melting of the line.
  • the neutral point is the intersection of the second end of the first inductor L1, the second end of the second inductor L2, and the second end of the third inductor L3.
  • the auxiliary circuit 700 includes a fourth inductor L4, a fifth inductor L5, a first resistor R1, a second resistor R2, a lightning protection line L0, and a three-phase line
  • the three-phase line includes a first phase line La , The second phase line Lb and the third phase line Lc, wherein the first end of the fourth inductor L4 is electrically connected to the second end of the adjustable reactor 100, and the second end of the fourth inductor L4 is connected to the first resistor R1
  • the first end is electrically connected, a lightning protection line L0 is connected between the second end of the first resistor R1 and the first end of the fifth inductor L5, the lightning protection line L0 is grounded, and the second end of the fifth inductor L5 is connected to the second resistor R2.
  • the first end is electrically connected, the second end of the second resistor R2 is electrically connected to any phase of the three-phase line, the second end of the second resistor R2 is grounded, and
  • the AC short-circuit current ice melting technology is the most economical and effective, but it is mainly aimed at the main network line. Due to the wide distribution of distribution network lines, many branch lines, complex lines, harsh terrain and climate conditions, and passing through areas with micro-topography and micro-climate that are prone to ice coating, it is a difficult point for the prevention and control of ice disasters.
  • FIG. 1 shows the connection point D of the third phase line Lc and the second end of the second resistor R2 in the three-phase line.
  • a switch can be set at the connection point D to control the third phase line Lc and the second end.
  • the second end of the second resistor R2 is connected or disconnected. That is, the first control loop formed by the third phase line Lc and the grounding transformer 200, the adjustable reactor 100, the fourth inductance L4, the fifth inductance L5, the first resistance R1, the second resistance R2 and the lightning protection line L0 is shown.
  • the current of the first control loop is adjusted by adjusting the reactance of the adjustable reactor to realize the online melting of the ice on the third phase line Lc.
  • the second end of the second resistor R2 is connected to the first phase line La or only to the second phase line Lb through the switch to form a first control loop, which may be the second end of the second resistor R2.
  • the second end is connected with other branches of the power grid through a switch to form a first control loop.
  • the online ice melting device further includes a switch 510 and a non-grounded module 520.
  • the grounded transformer 200 is electrically connected to the three-phase line through the switch 510, and the non-grounded module 520 is connected to the three-phase line through the switch 510.
  • the circuit is electrically connected, and the switch 510 is used to control the electrical connection between the three-phase circuit and the grounding transformer 200 or the non-grounding module 520.
  • the switch 510 may be a smart switch. Under normal circumstances, that is, when the line does not require ice melting, the non-grounding module 520 is electrically connected to the three-phase line through the switch 510. When ice melting is required, the grounding transformer 200 is connected to the three-phase line through the switch 510, so that the grounding transformer 200, the adjustable reactor 100 and the auxiliary circuit form a first control loop.
  • the non-grounding module 520 includes a sixth inductor L6, a seventh inductor L7, an eighth inductor L8, a ninth inductor L9, a tenth inductor L10, an eleventh inductor L11, and a third resistor R3,
  • the switch 510 includes a first contact 1, a second contact 2, a third contact 3, a fourth contact 4, a fifth contact 5, and a sixth contact 6, and the grounding transformer 100 includes a first inductance L1, a second Two inductors L2 and a third inductor L3, the first end of the first inductor L1 is electrically connected to the first contact 1, the first end of the second inductor L2 is electrically connected to the third contact 3, and the first end of the third inductor L3 Terminal is electrically connected to the fifth contact 5, the first terminal of the sixth inductor L6 is electrically connected to the second contact 2, the second terminal of the sixth inductor L6 is electrically connected to the first terminal of the seventh induct
  • the second end of the ninth inductor L9 is electrically connected to the first end of the third resistor R3, the first end of the tenth inductor L10 is electrically connected to the sixth contact 6, and the second end of the tenth inductor L10 is electrically connected to the The first end of the eleventh inductor L11 is electrically connected, the second end of the eleventh inductor L11 is electrically connected to the first end of the third resistor R3, and the second end of the third resistor R3 is grounded.
  • the online ice melting device further includes a three-phase power terminal 530, a line impedance module 550, and a load module 540; wherein, one end of the three-phase line is electrically connected to the three-phase power terminal 530, and the three-phase line The other end of is electrically connected to the load module 540, and the line impedance module 550 is connected to the three-phase line between the three-phase power terminal 530 and the load module 540.
  • the three-phase power terminal 530 includes a first-phase power terminal A, a second-phase power terminal B, and a third-phase power terminal C
  • the three-phase line includes a first phase line La, a second phase line Lb, and a third phase line.
  • Three-phase line Lc the first phase line La is connected between the first phase power terminal A and the load module 540
  • the second phase line Lb is connected between the second phase power terminal B and the load module 540
  • the third phase line The Lc connection line is between the first phase power terminal C and the load module 540.
  • the online ice melting device further includes a first capacitor C1, a second capacitor C2, and a third capacitor C3, and the three-phase line includes a first phase line La, a second phase line Lb, and a third phase line.
  • Line Lc the first end of the first capacitor C1 is electrically connected to the first phase line La, the second end of the first capacitor C1 is grounded, the first end of the second capacitor C2 is electrically connected to the second phase line Lb, and the second capacitor The second end of C2 is grounded, the first end of the third capacitor C3 is electrically connected to the third phase line Lc, and the second end of the third capacitor C3 is grounded.
  • Fig. 2 is a schematic structural diagram of the control principle of the adjustable reactor of an online ice melting device provided in the second embodiment of the present application.
  • it also includes a first current detection module 210 and a second current detection module 220.
  • the first current detection module 210 is electrically connected to the primary winding W1 and the controller 300
  • the second current detection module 220 is electrically connected to the secondary winding W2 and the controller 300.
  • the first current detection module 210 is used to detect the current on the primary winding W1 side
  • the second current detection module 220 is used to detect the current on the secondary winding W2 side.
  • the first current detection module 210 and the second current detection module 220 may be current transformers, Hall current sensors, current detectors, and the like.
  • the online ice melting device further includes a current-type inverter 310, which is electrically connected to the secondary winding W2, and the controller 310 is used to combine the first reference signal and the second reference signal.
  • the signal is superimposed to generate a fifth reference signal, and the current-type inverter 310 is used to follow the fifth reference signal to generate a first controllable current signal, and inject the first controllable current signal into the secondary winding W2 side.
  • Fig. 3 is a schematic structural diagram of an adjustable reactor of an online ice melting device in the second embodiment of the present application.
  • Fig. 4 is a T-shaped equivalent circuit diagram of an on-line ice melting device in the second embodiment of the present application whose secondary winding parameters are equivalent to the primary winding side.
  • the number of turns of the primary winding AX and the secondary winding ax are N 1 and N 2 , respectively.
  • the currents of the windings are i 1 and i 2 respectively , and the voltages across the primary winding and the secondary winding are u 1 and u 2 respectively .
  • r 1 , r 2 ′ and r m respectively represent the resistance of the primary winding, the resistance of the secondary winding equivalent to the resistance value of the primary winding and the excitation resistance;
  • L 1 ⁇ , L' 2 ⁇ and L m respectively represent the primary
  • the leakage inductance of the winding and the leakage inductance of the secondary winding are equivalent to the inductance value of the primary winding side and the magnetizing inductance.
  • the first reference signal output by the signal generating module may be a control signal adjusted by a preset ratio, and the second reference signal may be a control signal shifted by 90 degrees.
  • the controller 310 controls the first reference signal and the second reference signal into two channels. The signals that are orthogonal to each other are superimposed to generate a fifth reference signal. Then, the current source inverter 310 generates a first controllable current signal following the fifth reference signal, and injects the first controllable current signal into the secondary winding W2 side. Then the currents on the primary winding W1 side and the secondary winding W2 side of the adjustable reactor satisfy the following relationship:
  • k 1 is the proportional control coefficient of the first reference signal
  • k 2 is the quadrature control coefficient of the second reference signal.
  • Fig. 5 is a schematic structural diagram of the control principle of the adjustable reactor of another online ice melting device provided in the second embodiment of the present application.
  • the online ice melting device further includes a voltage-type inverter 320, which is electrically connected to the secondary winding W2, and the controller 300 is used to superimpose the third reference signal and the fourth reference signal to generate a second Six reference signals, the voltage-type inverter 320 is used to follow the sixth reference signal to generate a first controllable voltage signal, and inject the first controllable voltage signal into the secondary winding W2 side.
  • the third reference signal output by the signal generating module may be a control signal adjusted by a preset ratio, and the fourth reference signal may be a control signal shifted by 90 degrees.
  • the controller 310 controls the third reference signal and the fourth reference signal into two channels. The signals that are orthogonal to each other are superimposed to generate a sixth reference signal. Then, the voltage-type inverter 320 generates a first controllable voltage signal following the sixth reference signal, and injects the first controllable voltage signal into the secondary winding W2 side. Then the voltage on the primary winding W1 side and the secondary winding W2 side of the adjustable reactor satisfies the following relationship:
  • k 3 is the proportional control coefficient of the third reference signal
  • k 4 is the quadrature control coefficient of the fourth reference signal.

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Abstract

L'invention concerne un appareil de fusion de glace sur ligne, qui est utilisé pour faire fondre de la glace d'une ligne triphasée. L'appareil comprend : un réacteur réglable (100), un transformateur de mise à la terre (200), un module de génération de signal (400), un contrôleur (300) et un circuit auxiliaire (700), le transformateur de mise à la terre (200), le réacteur réglable (100), le circuit auxiliaire (700) et une ligne de n'importe quelle phase d'une ligne triphasée forment une première boucle de commande (600) ; le réacteur réglable (100) comprend un enroulement primaire (W1) et un enroulement secondaire (W2) ; et le contrôleur (300) est utilisé pour générer un premier signal de courant commandable en fonction d'un premier signal de référence et d'un deuxième signal de référence et ajuster le courant de la première boucle de commande (600) en fonction du premier signal de courant commandable ou alors le contrôleur est utilisé pour générer un premier signal de tension commandable en fonction d'un troisième signal de référence et d'un quatrième signal de référence et ajuster le courant de la première boucle de commande (600) en fonction du premier signal de tension commandable.
PCT/CN2020/108166 2020-05-11 2020-08-10 Appareil de fusion de glace sur ligne WO2021227267A1 (fr)

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CN202010394583.6A CN111431126A (zh) 2020-05-11 2020-05-11 一种在线融冰装置
CN202010394583.6 2020-05-11

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CN111431126A (zh) * 2020-05-11 2020-07-17 广东电网有限责任公司清远供电局 一种在线融冰装置
CN112564010B (zh) * 2020-12-07 2022-11-29 广东电网有限责任公司清远供电局 一种基于磁控可调电抗器的微网融冰电流控制装置及方法
CN112531730B (zh) * 2020-12-07 2023-02-17 广东电网有限责任公司清远供电局 一种兼具无功补偿及输出电流可调的融冰装置
CN113794175A (zh) * 2021-10-25 2021-12-14 广东电网有限责任公司 一种基于中性点的在线融冰装置及方法
CN114583649B (zh) * 2022-05-09 2022-07-19 广东电网有限责任公司佛山供电局 一种零序电流融冰装置及其控制策略、设备和介质

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