CN113708361B - Parallel direct current system sharing direct current energy consumption device - Google Patents
Parallel direct current system sharing direct current energy consumption device Download PDFInfo
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- CN113708361B CN113708361B CN202110828800.2A CN202110828800A CN113708361B CN 113708361 B CN113708361 B CN 113708361B CN 202110828800 A CN202110828800 A CN 202110828800A CN 113708361 B CN113708361 B CN 113708361B
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 288
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims abstract description 82
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- 230000005540 biological transmission Effects 0.000 claims description 14
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The invention discloses a parallel direct current system sharing a direct current energy consumption device, which comprises: a plurality of transmitting end converters, a plurality of receiving end converters and a direct current energy consumption device; for a symmetrical unipolar parallel direct current system formed by a transmitting-end converter and a receiving-end converter; two ends of a group of direct current energy consumption devices are respectively connected with positive electrode wires and negative electrode wires of the direct current sides of different symmetrical monopole parallel direct current systems through switches, so that the sharing of the direct current energy consumption devices of the symmetrical monopole multi-circuit parallel direct current systems is realized; for a bipolar parallel direct current system formed by two transmitting-end converters and two receiving-end converters, a group of direct current energy dissipation devices are shared between the positive electrode line and the neutral line of the multi-circuit bipolar parallel direct current system, and another group of direct current energy dissipation devices are shared between the negative electrode line and the neutral line of the multi-circuit bipolar parallel direct current system, so that the bipolar multi-circuit parallel direct current system shares two groups of direct current energy dissipation devices. By sharing the direct current energy consumption device, the number of groups of the direct current energy consumption device is reduced, and the equipment cost and the occupied area can be obviously reduced.
Description
Technical Field
The invention relates to the technical field of flexible direct current transmission of power systems, in particular to a parallel direct current system sharing a direct current energy consumption device.
Background
In the new energy high-voltage direct-current transmission project, the direct-current energy consumption device is a vital device. The direct current energy consumption device is mainly applied to an application scene that new energy is conveyed through direct current, if the sending end is new energy such as a wind power plant, when the receiving end alternating current system breaks down, energy is accumulated on the direct current side due to the fact that the receiving end is limited in conveying power, direct current voltage is increased, and safe operation of equipment is jeopardized. For offshore wind power engineering, in order to reduce the volume and weight requirements on an offshore converter station platform, a direct current energy consumption device is generally arranged on a receiving-end land converter station.
The existing projects of offshore wind power sent by adopting direct current transmission are flexible direct current transmission projects at two ends. With further development of deep sea wind power resources, wind power transmission capacity is increased to cause difficulty in building a converter station platform, wind power resources are dispersed to cause difficulty in converging offshore side wind energy to a single point for transmission, a multi-circuit direct current sending mode can be adopted, and when the direct current side voltages of the multi-circuit direct currents are consistent, a multi-circuit direct current parallel operation mode can be adopted, so that reliability is improved.
In the prior art, a group of direct current energy dissipation devices are required to be arranged at the direct current side outlet of each receiving-end converter in a multi-circuit direct current parallel system, so that the required manufacturing cost is high, the occupied area is large, and the economical efficiency is poor.
Disclosure of Invention
The embodiment of the invention provides a parallel direct current system sharing a direct current energy consumption device, which can obviously reduce equipment cost and manufacturing cost by sharing the direct current energy consumption device at a receiving end direct current side.
An embodiment of the present invention provides a symmetrical monopole parallel dc system sharing a dc energy dissipation device, including: the system comprises a first transmitting end converter, a second transmitting end converter, a first receiving end converter, a second receiving end converter and a direct current energy consumption device;
the positive electrode of the first transmitting end converter is connected with the positive electrode of the first receiving end converter through a first positive electrode line; the negative electrode of the first transmitting end converter is connected with the negative electrode of the first receiving end converter through a first negative electrode line;
the positive electrode of the second transmitting end converter is connected with the positive electrode of the second receiving end converter through a second positive electrode line; the negative electrode of the second transmitting end converter is connected with the negative electrode of the second receiving end converter through a second negative electrode line;
the first positive electrode wire is connected with the first end of the direct current energy consumption device through a first positive electrode switch, and the first negative electrode wire is connected with the second end of the direct current energy consumption device through a first negative electrode switch;
the second positive electrode wire is connected with the first end of the direct current energy consumption device through a second positive electrode switch, and the second negative electrode wire is connected with the second end of the direct current energy consumption device through a second negative electrode switch.
Preferably, the number of power modules in the dc power consumption device
Rated current of the direct current energy consumption deviceWherein U is dc Is the rated interelectrode direct current voltage of a symmetrical monopole parallel direct current system, U dcSM Is the rated DC voltage of the power module, P 1 Is the active power of the first loop symmetric monopole direct current system, P 2 Is the active power delivery of the second circularly symmetric unipolar DC system.
Further, when the direct current energy dissipation device adopts the centralized energy dissipation resistors, the number of the centralized energy dissipation resistors is 1, and the resistance value of the centralized energy dissipation resistors is
The energy e=tx (P 1 +P 2 ) The method comprises the steps of carrying out a first treatment on the surface of the Wherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device.
As another preferable mode, when the dc power dissipation device adopts distributed power dissipation resistors, the number of the distributed power dissipation resistors is equal to the number of the power modules, and the resistance value of the distributed power dissipation resistors is
Energy of distributed energy consumption resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device, j=1, … and x.
Another embodiment of the present invention provides a symmetrical unipolar parallel dc system sharing a dc energy dissipating device, the system comprising: m sending end converters, m receiving end converters and a direct current energy consumption device;
the positive electrode of the kth transmitting-end converter is connected with the positive electrode of the kth receiving-end converter through the kth positive electrode line; the negative electrode of the kth transmitting-end current converter is connected with the negative electrode of the kth receiving-end current converter through the kth negative electrode line;
the kth positive electrode wire is connected with the first end of the direct current energy consumption device through the kth positive electrode switch, and the kth negative electrode wire is connected with the second end of the direct current energy consumption device through the kth negative electrode switch, wherein m is more than 0, k=1, … and m.
Preferably, the number of power modules in the dc power consumption device
Rated current of the direct current energy consumption deviceWherein U is dc Is the rated interelectrode direct current voltage of a symmetrical monopole parallel direct current system, U dcSM Is the rated DC voltage, P of the power module k Is the active power delivery of the kth symmetric unipolar DC system.
Further, when the direct current energy dissipation device adopts the centralized energy dissipation resistors, the number of the centralized energy dissipation resistors is 1, and the resistance value of the centralized energy dissipation resistors is
Energy of the centralized energy dissipation resistor Wherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device.
As a preferable mode, when the dc power dissipation device adopts distributed power dissipation resistors, the number of the distributed power dissipation resistors is equal to the number of the power modules, and the resistance of the distributed power dissipation resistors is
Energy of distributed energy consumption resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device, j=1, … and x.
Yet another embodiment of the present invention provides a bipolar parallel dc system sharing a dc energy consuming device, the system comprising: the system comprises a first transmitting end converter, a second transmitting end converter, a third transmitting end converter, a fourth transmitting end converter, a first receiving end converter, a second receiving end converter, a third receiving end converter, a fourth receiving end converter, a first direct current energy consumption device and a second direct current energy consumption device;
the high-voltage side of the first transmitting end converter is connected with the high-voltage side of the first receiving end converter through a first positive pole line; the low-voltage side of the first transmitting-end converter is connected with the low-voltage side of the second receiving-end converter through a first neutral line; the low-voltage side of the first transmitting-end converter is connected with the low-voltage side of the second transmitting-end converter; the low-voltage side of the first receiving-end converter is connected with the low-voltage side of the second receiving-end converter; the high-voltage side of the second transmitting end converter is connected with the high-voltage side of the second receiving end converter through a first negative electrode wire;
The high-voltage side of the third transmitting-end converter is connected with the high-voltage side of the third receiving-end converter through a second positive pole line; the low-voltage side of the third transmitting-end converter is connected with the low-voltage side of the third receiving-end converter through a second neutral line; the low-voltage side of the third transmitting-end converter is connected with the low-voltage side of the fourth transmitting-end converter; the low-voltage side of the third receiving-end converter is connected with the low-voltage side of the fourth receiving-end converter; the high-voltage side of the fourth transmitting-end converter is connected with the high-voltage side of the fourth receiving-end converter through a second negative electrode line;
the first positive electrode wire is connected with the first end of the first direct current energy consumption device through a first positive electrode switch, and the second positive electrode wire is connected with the first end of the first direct current energy consumption device through a second positive electrode switch;
the first neutral line is connected with the second end of the first direct current energy consumption device through a first neutral switch, and the second neutral line is connected with the second end of the first direct current energy consumption device through a second neutral switch;
the first neutral line is connected with the first end of the second direct current energy consumption device through a third neutral switch, and the second neutral line is connected with the first end of the second direct current energy consumption device through a fourth neutral switch;
The first negative electrode wire is connected with the second end of the second direct current energy consumption device through a first negative electrode switch, and the second negative electrode wire is connected with the second end of the second direct current energy consumption device through a second negative electrode switch.
As a preferable mode, the number of the first power modules in the first direct current energy consumption device and the number of the second power modules in the second direct current energy consumption device are both x;
the rated current of the first direct current energy consumption device and the rated current of the second direct current energy consumption device are both I;
when the first direct current energy consumption device and the second direct current energy consumption device both adopt a centralized energy consumption resistor, the resistance value of the centralized energy consumption resistor of the first direct current energy consumption device and the resistance value of the centralized energy consumption resistor of the second direct current energy consumption device are both R, and the energy of the centralized energy consumption resistor of the first direct current energy consumption device and the energy of the centralized energy consumption resistor of the second direct current energy consumption device are both E;
when the first direct current energy consumption device and the second direct current energy consumption device both adopt distributed energy consumption resistors, the number of the distributed energy consumption resistors of the first direct current energy consumption device and the number of the centralized energy consumption resistors of the second direct current energy consumption device are both x, and the resistance value of the distributed energy consumption resistors of the first direct current energy consumption device is R 1j The resistance value of the distributed energy dissipation resistor of the second direct current energy dissipation device is R 2j The energy of the distributed energy dissipation resistor of the first direct current energy dissipation device is E 1j The energy of the distributed energy dissipation resistor of the second direct current energy dissipation device is E 2j ；
Wherein,E＝t×(P 1 +P 2 )，U dc rated unipolar DC voltage of bipolar parallel DC system, U dcSM Is the rated DC voltage of the first power module or the rated DC voltage of the second power module, P 1 Is the monopole active power transmission power of a first loop bipolar direct current system, P 2 Is the monopole active power transmission power of a second loop bipolar direct current system, alpha Udc Is the action constant value of the direct-current voltage of the first direct-current energy consumption device or the second direct-current energy consumption device which is put into operation, and t is the first direct-current energy consumption deviceAnd the time length of the operation of the current energy consumption device or the second direct current energy consumption device is j=1, … and x.
The parallel direct current system sharing the direct current energy consumption device provided by the embodiment of the invention comprises: a plurality of transmitting end converters, a plurality of receiving end converters and a direct current energy consumption device; for a symmetrical unipolar parallel direct current system formed by a transmitting-end converter and a receiving-end converter; the two ends of the direct current energy consumption device are respectively connected with the direct current side of the symmetric monopole parallel direct current system through a switch, so that the sharing of the direct current energy consumption devices of the multi-loop symmetric monopole parallel direct current system is realized; for a bipolar parallel direct current system formed by two transmitting-end converters and two receiving-end converters, a positive electrode wire and a neutral wire of the multi-circuit bipolar parallel direct current system share one group of direct current energy consumption devices, and a negative electrode wire and the neutral wire of the multi-circuit bipolar parallel direct current system share the other group of direct current energy consumption devices, so that the multi-circuit bipolar parallel direct current system shares one group of direct current energy consumption devices. By sharing the direct current energy consumption device, the number of groups of the direct current energy consumption device is reduced, and the equipment cost and the occupied area can be obviously reduced.
Drawings
Fig. 1 is a schematic structural diagram of a symmetrical monopole parallel dc system sharing a dc energy dissipation device according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a centralized power dissipation resistor provided by an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a distributed energy dissipation resistor provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a bipolar parallel dc system sharing a dc energy dissipation device according to another embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the symmetrical monopole parallel dc system of the common dc energy dissipation device provided by the embodiment of the present invention is a schematic structural diagram of the symmetrical monopole parallel dc system of the common dc energy dissipation device provided by the embodiment of the present invention, and includes: the system comprises a first transmitting end converter, a second transmitting end converter, a first receiving end converter, a second receiving end converter and a direct current energy consumption device;
The positive electrode of the first transmitting end converter is connected with the positive electrode of the first receiving end converter through a first positive electrode line; the negative electrode of the first transmitting end converter is connected with the negative electrode of the first receiving end converter through a first negative electrode line;
the positive electrode of the second transmitting end converter is connected with the positive electrode of the second receiving end converter through a second positive electrode line; the negative electrode of the second transmitting end converter is connected with the negative electrode of the second receiving end converter through a second negative electrode line;
the first positive electrode wire is connected with the first end of the direct current energy consumption device through a first positive electrode switch, and the first negative electrode wire is connected with the second end of the direct current energy consumption device through a first negative electrode switch;
the second positive electrode wire is connected with the first end of the direct current energy consumption device through a second positive electrode switch, and the second negative electrode wire is connected with the second end of the direct current energy consumption device through a second negative electrode switch.
In a specific implementation of this embodiment, the system includes: a transmitting end converter 1, a transmitting end converter 2, a receiving end converter 1, a receiving end converter 2 and a direct current energy consumption device T;
the positive electrode of the transmitting end converter 1 is connected with the positive electrode of the receiving end converter 1 through a positive electrode line 1; the negative electrode of the transmitting end converter 1 is connected with the negative electrode of the receiving end converter 1 through a negative electrode line 1;
The positive electrode of the transmitting-end converter 2 is connected with the positive electrode of the receiving-end converter 2 through a positive electrode line 2; the negative electrode of the transmitting-end converter 2 is connected with the negative electrode of the receiving-end converter 2 through a negative electrode line 2;
the positive electrode wire 1 is connected with a first end of the direct current energy consumption device T through a first positive electrode switch K1, and the negative electrode wire 1 is connected with a second end of the direct current energy consumption device T through a first negative electrode switch K2;
the positive electrode wire 2 is connected with the first end of the direct current energy consumption device T through a second positive electrode switch K3, and the negative electrode wire 2 is connected with the second end of the direct current energy consumption device T through a second negative electrode switch K4.
In addition, the alternating current side of the feed-end converter 1 is used for being connected with a fan WT of the wind farm 1 through a transformer, and the fan WT is used for supplying power to the feed-end converter 1; the alternating current side of the feed-end converter 2 is connected with a fan WT of the wind farm 2 through a transformer, and the fan WT is used for supplying power to the feed-end converter 2; the receiving end converter 1 and the receiving end converter 2 are connected with an alternating current end AC through a transformer for power supply.
The working principle of the direct current energy consumption device is as follows: when the receiving-end converter fails and the energy of the transmitting end cannot be completely transmitted and consumed, the direct-current voltage rises, when the direct-current voltage exceeds a design threshold value, the direct-current energy consumption device is triggered, and the energy consumption resistor in the loop is connected through the on-off of high-power devices such as an IGBT (insulated gate bipolar transistor) to consume surplus power and maintain the stability of the direct-current voltage.
The embodiment of the invention provides a symmetrical monopole parallel direct current system sharing a direct current energy consumption device, which comprises the following components: the system comprises a first transmitting end converter, a second transmitting end converter, a first receiving end converter, a second receiving end converter and a direct current energy consumption device; a first symmetrical unipolar direct current system formed by the first transmitting end converter and the first receiving end converter, and a second symmetrical unipolar direct current system formed by the second transmitting end converter and the second receiving end converter; the two ends of the direct current energy consumption device are respectively connected with the direct current side of the receiving-end converter of the transmitting-end converter of the symmetrical unipolar parallel direct current system through switches. If a certain back-symmetrical monopole parallel direct current system is out of operation, the direct current energy consumption device and the back-direct current can be disconnected by opening the switch equipment; by sharing the direct current energy consumption device, the number of groups of the direct current energy consumption device is reduced, and the equipment cost and the occupied area can be obviously reduced.
In yet another embodiment of the present invention, the number of power modules in the dc power consuming device
Rated current of the direct current energy consumption deviceWherein U is dc Rated DC voltage of symmetric monopole parallel DC system, U dcSM Is the rated DC voltage of the power module, P 1 Is the active power of the first loop symmetric monopole direct current system, P 2 Is the active power delivery of the second loop symmetric unipolar dc system.
In the embodiment, the number of power modules in the dc power consumption deviceRated current of DC energy consumption device>Wherein U is dc Is the rated interelectrode direct current voltage of a symmetrical monopole parallel direct current system, U dcSM Is the rated DC voltage of the power module, P 1 Is the active power of the first loop symmetric monopole direct current system, P 2 Is the active power delivery of the second loop symmetric unipolar dc system.
In still another embodiment of the present invention, when the dc power dissipation device uses centralized power dissipation resistors, the number of centralized power dissipation resistors is 1, and the resistance of the centralized power dissipation resistors is
The energy e=tx (P 1 +P 2 ) The method comprises the steps of carrying out a first treatment on the surface of the Wherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device.
In the implementation of this embodiment, referring to fig. 2, a schematic circuit diagram of a centralized energy dissipation resistor provided in this embodiment of the present invention is shown, where the centralized energy dissipation resistor includes a centralized resistor R and a plurality of power modules composed of transistors, diodes and capacitors, and the transistors are insulated gate bipolar transistors or injection enhancement gate transistors.
It should be noted that, the centralized energy dissipation resistor provided in this embodiment is formed by a resistor, a triode and a diode, which is only an alternative way of the centralized energy dissipation resistor of the present invention, and other circuits of the centralized energy dissipation resistor may be adopted in actual use.
When the direct current energy dissipation device adopts the centralized energy dissipation resistors, the number of the centralized energy dissipation resistors is 1, and the resistance value of the centralized energy dissipation resistor R
Energy e=tx (P 1 +P 2 ) The method comprises the steps of carrying out a first treatment on the surface of the Wherein alpha is Udc The direct-current voltage action fixed value is the direct-current energy consumption device put into operation, and t is the duration of the direct-current energy consumption device put into operation.
As a parallel embodiment, when the dc power dissipation device adopts distributed power dissipation resistors, the number of the distributed power dissipation resistors is equal to the number of the power modules, and the resistance of the distributed power dissipation resistors is
Energy of distributed energy consumption resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device, j=1, … and x.
In the implementation of this embodiment, referring to fig. 3, a schematic circuit diagram of a distributed energy dissipation resistor provided by the embodiment of the present invention is shown, where the distributed energy dissipation resistor includes a plurality of power modules formed by parallel connection of a triode, a capacitor, a diode and a distributed energy dissipation resistor Ri.
It should be noted that, the centralized energy dissipation resistor provided in this embodiment is formed by a resistor, a triode and a diode, which is only an alternative way of the centralized energy dissipation resistor of the present invention, and other circuits of the centralized energy dissipation resistor may be adopted in actual use.
When the direct current energy consumption device adopts the distributed energy consumption resistors, the number of the distributed energy consumption resistors is equal to the number of the power modules, namely x, and the resistance value of the distributed energy consumption resistors is
Energy of distributed energy consumption resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device, j=1, … and x.
The two-loop symmetrical monopole parallel direct current system shares 1 group of direct current energy consumption devices, rated current and energy absorption requirements of the direct current energy consumption devices can be increased, normal and stable operation of the symmetrical monopole parallel direct current system can be ensured through calculation and limitation of parameters of the direct current energy consumption devices, and meanwhile, the reduction of the number of devices such as power modules, resistors and the like can obviously reduce the occupied area and the manufacturing cost of the total devices.
It should be noted that, in this embodiment, a two-loop symmetric monopole parallel dc system is taken as an example to describe a specific implementation manner of the common dc energy dissipation device, and when a multi-loop symmetric monopole parallel dc system exists, a group of dc energy dissipation devices can be shared by each two-loop symmetric monopole parallel dc system, and its implementation manner is the same as that of this embodiment and will not be described herein.
The embodiment of the invention provides a symmetrical monopole parallel direct current system sharing a direct current energy consumption device, which comprises the following components: the system comprises a first transmitting end converter, a second transmitting end converter, a first receiving end converter, a second receiving end converter and a direct current energy consumption device; a first symmetrical unipolar direct current system formed by the first transmitting end converter and the first receiving end converter, and a second symmetrical unipolar direct current system formed by the second transmitting end converter and the second receiving end converter; the two ends of the direct current energy consumption device are respectively connected with the direct current side of the symmetrical monopole parallel direct current system through a switch. If a certain back-symmetrical monopole parallel direct current system is out of operation, the direct current energy consumption device and the back-direct current can be disconnected by opening the switch equipment; by sharing the direct current energy consumption device, the number of groups of the direct current energy consumption device is reduced, and the equipment cost and the occupied land cost can be obviously reduced.
In yet another embodiment of the present invention, there is provided a symmetrical unipolar parallel dc system sharing a dc energy consuming device, the system comprising: m sending end converters, m receiving end converters and a direct current energy consumption device;
the positive electrode of the kth transmitting-end converter is connected with the positive electrode of the kth receiving-end converter through the kth positive electrode line; the negative electrode of the kth transmitting-end converter is connected with the negative electrode of the kth receiving-end converter through the kth negative electrode line;
The kth positive electrode wire is connected with the first end of the direct current energy consumption device through the kth positive electrode switch, and the kth negative electrode wire is connected with the second end of the direct current energy consumption device through the kth negative electrode switch, wherein m is more than 0, k=1, … and m.
When the embodiment is implemented, the symmetric monopole parallel direct current system comprises multiple loops, and the multiple loops share the same direct current energy consumption device, so that the cost of the direct current energy consumption device can be reduced to a greater extent.
In yet another embodiment of the present invention, the number of power modules in the dc power consuming device
Rated current of the direct current energy consumption deviceWherein U is dc Is the rated interelectrode direct current voltage of a symmetrical monopole parallel direct current system, U dcSM Is the rated DC voltage, P of the power module k Is the active power delivery of the kth symmetric unipolar DC system.
In still another embodiment of the present invention, when the dc power dissipation device uses centralized power dissipation resistors, the number of centralized power dissipation resistors is 1, and the resistance of the centralized power dissipation resistors is
Energy of the centralized energy dissipation resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device.
In the embodiment, the centralized energy consumption resistor comprises a centralized resistor R and a plurality of power modules composed of transistors, diodes and capacitors, wherein the transistors are insulated gate bipolar transistors or injection enhancement type gate transistors.
When the direct current energy consumption device adopts the centralized energy consumption resistors, the number of the centralized energy consumption resistors is 1, and the resistance value of the centralized energy consumption resistors is
Energy of the centralized energy dissipation resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device.
In one parallel implementation mode provided by the invention, when the direct current energy consumption device adopts the distributed energy consumption resistors, the number of the distributed energy consumption resistors is equal to that of the power modules, and the resistance value of the distributed energy consumption resistors is
Energy of distributed energy consumption resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device, j=1, … and x.
When the embodiment is implemented, the distributed energy dissipation resistor comprises a plurality of power modules formed by connecting triodes, capacitors, diodes and the distributed energy dissipation resistor Ri in parallel.
When the direct current energy consumption device adopts the distributed energy consumption resistors, the number of the distributed energy consumption resistors is equal to that of the power modules, and the resistance value of the distributed energy consumption resistors is as follows
Energy of distributed energy consumption resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device, j=1, … and x.
In the implementation of the invention, the direct current energy consumption device can be a distributed energy consumption resistor or a centralized energy consumption resistor.
The embodiment of the invention provides a symmetrical monopole parallel direct current system sharing a direct current energy consumption device, which comprises the following components: m sending end converters, m receiving end converters and a direct current energy consumption device; the two ends of the direct current energy consumption device are respectively connected with the direct current side of the symmetrical monopole parallel direct current system through a switch. If a certain back-symmetrical monopole parallel direct current system is out of operation, the direct current energy consumption device and the back-direct current can be disconnected by opening the switch equipment; by sharing the direct current energy consumption device, the number of groups of the direct current energy consumption device is reduced, and the equipment cost and the occupied area can be obviously reduced.
The embodiment of the invention also provides a bipolar parallel direct current system sharing the direct current energy consumption device, which comprises: the system comprises a first transmitting end converter, a second transmitting end converter, a third transmitting end converter, a fourth transmitting end converter, a first receiving end converter, a second receiving end converter, a third receiving end converter, a fourth receiving end converter, a first direct current energy consumption device and a second direct current energy consumption device;
The high-voltage side of the first transmitting end converter is connected with the high-voltage side of the first receiving end converter through a first positive pole line; the low-voltage side of the first transmitting-end converter is connected with the low-voltage side of the second receiving-end converter through a first neutral line; the low-voltage side of the first transmitting-end converter is connected with the low-voltage side of the second transmitting-end converter; the low-voltage side of the first receiving-end converter is connected with the low-voltage side of the second receiving-end converter; the high-voltage side of the second transmitting end converter is connected with the high-voltage side of the second receiving end converter through a first negative electrode wire;
the high-voltage side of the third transmitting-end converter is connected with the high-voltage side of the third receiving-end converter through a second positive pole line; the low-voltage side of the third transmitting-end converter is connected with the low-voltage side of the third receiving-end converter through a second neutral line; the low-voltage side of the third transmitting-end converter is connected with the low-voltage side of the fourth transmitting-end converter; the low-voltage side of the third receiving-end converter is connected with the low-voltage side of the fourth receiving-end converter; the high-voltage side of the fourth transmitting-end converter is connected with the high-voltage side of the fourth receiving-end converter through a second negative electrode line;
The first positive electrode wire is connected with the first end of the first direct current energy consumption device through a first positive electrode switch, and the second positive electrode wire is connected with the first end of the first direct current energy consumption device through a second positive electrode switch;
the first neutral line is connected with the second end of the first direct current energy consumption device through a first neutral switch, and the second neutral line is connected with the second end of the first direct current energy consumption device through a second neutral switch;
the first neutral line is connected with the first end of the second direct current energy consumption device through a third neutral switch, and the second neutral line is connected with the first end of the second direct current energy consumption device through a fourth neutral switch;
the first negative electrode wire is connected with the second end of the second direct current energy consumption device through a first negative electrode switch, and the second negative electrode wire is connected with the second end of the second direct current energy consumption device through a second negative electrode switch.
In the implementation of this embodiment, referring to fig. 4, a schematic structural diagram of a bipolar parallel dc system of a common dc energy dissipation device according to another embodiment of the present invention is shown, where the system includes: a transmitting end current converter 1.1, a transmitting end current converter 1.2, a transmitting end current converter 2.1, a transmitting end current converter 2.2, a receiving end current converter 1.1, a receiving end current converter 1.2, a receiving end current converter 2.1, a receiving end current converter 2.2, a direct current energy consumption device T1 and a direct current energy consumption device T2;
The high-voltage side of the transmitting end converter 1.1 is connected with the high-voltage side of the receiving end converter 1.1 through a positive pole line 1.0; the low-voltage side of the transmitting-end converter 1.1 is connected with the low-voltage side of the receiving-end converter 1.2 through a neutral line 1.0; the low-voltage side of the transmitting-end converter 1.1 is connected with the low-voltage side of the transmitting-end converter 1.2; the low-voltage side of the receiving-end converter 1.1 is connected with the low-voltage side of the receiving-end converter 1.2; the high-voltage side of the transmitting end converter 1.2 is connected with the high-voltage side of the receiving end converter 1.2 through a negative electrode line 1.0;
the high-voltage side of the transmitting end converter 2.1 is connected with the high-voltage side of the receiving end converter 2.1 through a positive pole line 2.0; the low-voltage side of the transmitting-end converter 2.1 is connected with the low-voltage side of the receiving-end converter 2.1 through a neutral line 2.0; the low-voltage side of the transmitting-end converter 2.1 is connected with the low-voltage side of the transmitting-end converter 2.2; the low-voltage side of the receiving-end converter 2.1 is connected with the low-voltage side of the receiving-end converter 2.2; the high-voltage side of the transmitting end converter 2.2 is connected with the high-voltage side of the receiving end converter 2.2 through a cathode line 2.0;
the positive electrode wire 1.0 is connected with the first end of the direct current energy consumption device T1 through a first positive electrode switch K1.0, and the positive electrode wire 2.0 is connected with the first end of the direct current energy consumption device T1 through a second positive electrode switch K2.0;
The neutral line 1.0 is connected with the second end of the direct current energy consumption device T1 through a first neutral switch K3.0, and the neutral line 2.0 is connected with the second end of the direct current energy consumption device T1 through a second neutral switch K4.0;
the neutral line 1.0 is connected with the first end of the direct current energy consumption device T2 through a third neutral switch K5.0, and the neutral line 2.0 is connected with the first end of the direct current energy consumption device T2 through a fourth neutral switch K6.0;
the negative electrode line 1.0 is connected with the second end of the direct current energy consumption device T2 through a first negative electrode switch K7.0, and the negative electrode line 2.0 is connected with the second end of the direct current energy consumption device T2 through a second negative electrode switch K8.0.
In this embodiment, the connection relationship of the common dc energy dissipation device is described by taking the two-circuit bipolar parallel dc system as an example, and for the bipolar multi-circuit bipolar dc system, all positive electrode wires and neutral wires of the multi-circuit bipolar parallel dc system share one set of dc energy dissipation device, and negative electrode wires and neutral wires of the multi-circuit bipolar parallel dc system share another set of dc energy dissipation device, so that the multi-circuit bipolar parallel dc system shares one set of dc energy dissipation device, which is not described herein.
In addition, the alternating current side of the feed-side converter 1.1 is used for being connected with a fan WT of the wind farm 1.1 through a transformer, and the fan WT is used for supplying power to the feed-side converter 1.1; the alternating current side of the feed-end converter 1.2 is connected with a fan WT of the wind farm 1.2 through a transformer, and the fan WT is used for supplying power to the feed-end converter 1.2; the alternating current side of the feed-end converter 2.1 is connected with a fan WT of the wind farm 2.1 through a transformer, and the fan WT is used for supplying power to the feed-end converter 2.1; the alternating current side of the feed-end converter 2.2 is connected with a fan WT of the wind farm 2.2 through a transformer, and the fan WT is used for supplying power to the feed-end converter 2.2; the receiving end converter 1.1, the receiving end converter 1.2, the receiving end converter 2.1 and the receiving end converter 2.2 are connected with an Alternating Current (AC) end through transformers for power supply.
In still another embodiment of the present invention, the number of the first power modules in the first dc power consuming device and the number of the second power modules in the second dc power consuming device are both x;
the rated current of the first direct current energy consumption device and the rated current of the second direct current energy consumption device are both I;
when the second direct current energy consumption devices of the first direct current energy consumption devices adopt a centralized energy consumption resistor, the resistance of the centralized energy consumption resistor of the first direct current energy consumption devices and the resistance of the centralized energy consumption resistor of the second direct current energy consumption devices are both R, and the energy of the centralized energy consumption resistor of the first direct current energy consumption devices and the energy of the centralized energy consumption resistor of the second direct current energy consumption devices are both E;
When the second direct current energy dissipation devices of the first direct current energy dissipation devices all adopt distributed energy dissipation resistors, the number of the distributed energy dissipation resistors of the first direct current energy dissipation devices and the number of the centralized energy dissipation resistors of the second direct current energy dissipation devices are x, and the resistance value of the distributed energy dissipation resistors of the first direct current energy dissipation devices is R 1j The resistance value of the distributed energy dissipation resistor of the second direct current energy dissipation device is R 2j The energy of the distributed energy dissipation resistor of the first direct current energy dissipation device is E 1j The energy of the distributed energy dissipation resistor of the second direct current energy dissipation device is E 2j ；
Wherein,E＝t×(P 1 +P 2 )，U dc rated unipolar DC voltage of bipolar parallel DC system, U dcSM Is the rated DC voltage of the first power module or the rated DC voltage of the second power module, P 1 Is the monopole active power transmission power of a first loop bipolar direct current system, P 2 Is the monopole active power transmission power of a second loop bipolar direct current system, alpha Udc The direct current voltage action constant value is the direct current voltage action constant value of the first direct current energy consumption device or the second direct current energy consumption device which is put into operation, and t is the duration of the first direct current energy consumption device or the second direct current energy consumption device which is put into operation, wherein j=1, … and x.
In the embodiment, a bipolar parallel direct current system with two parallel circuits is taken as an example to describe specific parameter setting, two groups of direct current energy dissipation devices can be shared for a bipolar parallel direct current system with multiple parallel circuits, the parameter setting of the two groups of direct current energy dissipation devices is the same, and the number of power modules in the direct current energy dissipation devices is x; rated current of the direct current energy consumption device is I;
when the direct current energy consumption device adopts a centralized energy consumption resistor, the resistance value of the centralized energy consumption resistor of the direct current energy consumption device is R, and the energy of the centralized energy consumption resistor of the direct current energy consumption device is E;
when the direct current energy consumption device adopts the distributed energy consumption resistors, the number of the distributed energy consumption resistors of the direct current energy consumption device is x, and the resistance value of the distributed energy consumption resistors of the direct current energy consumption device is R j The energy of the distributed energy dissipation resistor of the direct current energy dissipation device is E j ；
Wherein, m is the return number of a bipolar parallel direct current system, U dc Rated unipolar DC voltage of bipolar parallel DC system, U dcSM Is the rated DC voltage of the first power module or the rated DC voltage of the second power module, P k Is the monopole active power transmission power of the kth return bipolar direct current system, alpha Udc The direct current voltage action constant value is the direct current voltage action constant value of the first direct current energy consumption device or the second direct current energy consumption device which is put into operation, and t is the duration of the first direct current energy consumption device or the second direct current energy consumption device which is put into operation, wherein j=1, … and x.
For the multi-circuit bipolar direct current parallel system, the positive electrode and the neutral line of the multi-circuit bipolar parallel direct current system share 1 group of energy consumption devices, the negative electrode and the neutral line share 1 group of energy consumption devices, the parameter settings of the two groups of energy consumption devices are the same, and the number of the groups of direct current energy consumption devices is reduced by sharing the direct current energy consumption devices, so that the equipment cost and the occupied land cost are obviously reduced.
The invention provides a parallel direct current system sharing a direct current energy consumption device, which comprises: a plurality of transmitting end converters, a plurality of receiving end converters and a direct current energy consumption device; for a symmetrical unipolar parallel direct current system formed by a transmitting-end converter and a receiving-end converter; the two ends of the direct current energy consumption device are respectively connected with the direct current side of the symmetric monopole parallel direct current system through a switch, so that the sharing of the direct current energy consumption devices of the multi-loop symmetric monopole parallel direct current system is realized; for a bipolar parallel direct current system formed by two transmitting-end converters and two receiving-end converters, a positive electrode wire and a neutral wire of the multi-circuit bipolar parallel direct current system share one group of direct current energy consumption devices, and a negative electrode wire and the neutral wire of the multi-circuit bipolar parallel direct current system share the other group of direct current energy consumption devices, so that the multi-circuit bipolar parallel direct current system shares one group of direct current energy consumption devices. By sharing the direct current energy consumption device, the number of groups of the direct current energy consumption device is reduced, and the equipment cost and the occupied area can be obviously reduced.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (10)
1. A symmetrical unipolar parallel dc system sharing a dc energy dissipating device, comprising: the system comprises a first transmitting end converter, a second transmitting end converter, a first receiving end converter, a second receiving end converter and a direct current energy consumption device;
the positive electrode of the first transmitting end converter is connected with the positive electrode of the first receiving end converter through a first positive electrode line; the negative electrode of the first transmitting end converter is connected with the negative electrode of the first receiving end converter through a first negative electrode line;
the positive electrode of the second transmitting end converter is connected with the positive electrode of the second receiving end converter through a second positive electrode line; the negative electrode of the second transmitting end converter is connected with the negative electrode of the second receiving end converter through a second negative electrode line;
the first positive electrode wire is connected with the first end of the direct current energy consumption device through a first positive electrode switch, and the first negative electrode wire is connected with the second end of the direct current energy consumption device through a first negative electrode switch;
The second positive electrode wire is connected with the first end of the direct current energy consumption device through a second positive electrode switch, and the second negative electrode wire is connected with the second end of the direct current energy consumption device through a second negative electrode switch.
2. The symmetrical, monopolar, parallel dc system of a common dc power consumer of claim 1 wherein the number of power modules in said dc power consumer
Rated current of the direct current energy consumption deviceWherein U is dc Is the rated interelectrode direct current voltage of a symmetrical monopole parallel direct current system, U dcSM Is the rated DC voltage of the power module, P 1 Is the rated active power of the first DC system, P 2 Is the rated active power delivery of the second DC system.
3. The symmetrical single-pole parallel DC system sharing a DC power dissipation device as set forth in claim 2, wherein when the DC power dissipation device employs centralized power dissipation resistors, the number of centralized power dissipation resistors is 1, and the resistance of the centralized power dissipation resistors is
The energy e=tx (P 1 +P 2 ) The method comprises the steps of carrying out a first treatment on the surface of the Wherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device.
4. The symmetrical single-pole parallel DC system sharing a DC power consumption device as claimed in claim 2, wherein when the DC power consumption device adopts distributed power consumption resistors, the number of the distributed power consumption resistors is equal to the number of the power modules, and the resistance of the distributed power consumption resistors is
Energy of distributed energy consumption resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device, j=1, … and x.
5. A symmetrical unipolar parallel dc system sharing a dc energy dissipating device, the system comprising: m sending end converters, m receiving end converters and a direct current energy consumption device;
the positive electrode of the kth transmitting-end converter is connected with the positive electrode of the kth receiving-end converter through the kth positive electrode line; the negative electrode of the kth transmitting-end current converter is connected with the negative electrode of the kth receiving-end current converter through the kth negative electrode line;
the kth positive electrode wire is connected with the first end of the direct current energy consumption device through the kth positive electrode switch, and the kth negative electrode wire is connected with the second end of the direct current energy consumption device through the kth negative electrode switch, wherein m is more than 0, k=1, … and m.
6. The symmetrical single pole parallel dc system sharing a dc energy dissipating device according to claim 5, wherein the number of power modules in the dc energy dissipating device
Rated current of the direct current energy consumption deviceWherein U is dc Is the rated interelectrode direct current voltage of a symmetrical monopole parallel direct current system, U dcSM Is the rated DC voltage, P of the power module k Is the rated active power transmission power of the kth symmetric unipolar direct current system.
7. The symmetrical monopolar parallel connection of a common dc energy consuming device of claim 6The direct current system is characterized in that when the direct current energy dissipation device adopts the centralized energy dissipation resistors, the number of the centralized energy dissipation resistors is 1, and the resistance value of the centralized energy dissipation resistors is
Energy of the centralized energy dissipation resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device.
8. The symmetrical single pole parallel dc system sharing a dc power dissipation device as defined in claim 6, wherein when the dc power dissipation device employs distributed dissipation resistors, the number of distributed dissipation resistors is equal to the number of power modules, and the resistance of the distributed dissipation resistors is
Energy of distributed energy consumption resistorWherein alpha is Udc The constant value of the direct-current voltage action of the direct-current energy consumption device is obtained, and t is the duration of the direct-current energy consumption device, j=1, … and x.
9. A bipolar parallel dc system sharing a dc energy consumer, the system comprising: the system comprises a first transmitting end converter, a second transmitting end converter, a third transmitting end converter, a fourth transmitting end converter, a first receiving end converter, a second receiving end converter, a third receiving end converter, a fourth receiving end converter, a first direct current energy consumption device and a second direct current energy consumption device;
the high-voltage side of the first transmitting end converter is connected with the high-voltage side of the first receiving end converter through a first positive pole line; the low-voltage side of the first transmitting-end converter is connected with the low-voltage side of the second receiving-end converter through a first neutral line; the low-voltage side of the first transmitting-end converter is connected with the low-voltage side of the second transmitting-end converter; the low-voltage side of the first receiving-end converter is connected with the low-voltage side of the second receiving-end converter; the high-voltage side of the second transmitting end converter is connected with the high-voltage side of the second receiving end converter through a first negative electrode wire;
the high-voltage side of the third transmitting-end converter is connected with the high-voltage side of the third receiving-end converter through a second positive pole line; the low-voltage side of the third transmitting-end converter is connected with the low-voltage side of the third receiving-end converter through a second neutral line; the low-voltage side of the third transmitting-end converter is connected with the low-voltage side of the fourth transmitting-end converter; the low-voltage side of the third receiving-end converter is connected with the low-voltage side of the fourth receiving-end converter; the high-voltage side of the fourth transmitting-end converter is connected with the high-voltage side of the fourth receiving-end converter through a second negative electrode line;
The first positive electrode wire is connected with the first end of the first direct current energy consumption device through a first positive electrode switch, and the second positive electrode wire is connected with the first end of the first direct current energy consumption device through a second positive electrode switch;
the first neutral line is connected with the second end of the first direct current energy consumption device through a first neutral switch, and the second neutral line is connected with the second end of the first direct current energy consumption device through a second neutral switch;
the first neutral line is connected with the first end of the second direct current energy consumption device through a third neutral switch, and the second neutral line is connected with the first end of the second direct current energy consumption device through a fourth neutral switch;
the first negative electrode wire is connected with the second end of the second direct current energy consumption device through a first negative electrode switch, and the second negative electrode wire is connected with the second end of the second direct current energy consumption device through a second negative electrode switch.
10. The bipolar parallel dc system sharing a dc power dissipation device of claim 9 wherein the number of first power modules in the first dc power dissipation device and the number of second power modules in the second dc power dissipation device are both x;
The rated current of the first direct current energy consumption device and the rated current of the second direct current energy consumption device are both I;
when the first direct current energy consumption device and the second direct current energy consumption device both adopt a centralized energy consumption resistor, the resistance value of the centralized energy consumption resistor of the first direct current energy consumption device and the resistance value of the centralized energy consumption resistor of the second direct current energy consumption device are both R, and the energy of the centralized energy consumption resistor of the first direct current energy consumption device and the energy of the centralized energy consumption resistor of the second direct current energy consumption device are both E;
when the first direct current energy consumption device and the second direct current energy consumption device both adopt distributed energy consumption resistors, the number of the distributed energy consumption resistors of the first direct current energy consumption device and the number of the centralized energy consumption resistors of the second direct current energy consumption device are both x, and the resistance value of the distributed energy consumption resistors of the first direct current energy consumption device is R 1j The resistance value of the distributed energy dissipation resistor of the second direct current energy dissipation device is R 2j The energy of the distributed energy dissipation resistor of the first direct current energy dissipation device is E 1j The energy of the distributed energy dissipation resistor of the second direct current energy dissipation device is E 2j ；
Wherein,E＝t×(P 1 +P 2 )，U dc rated unipolar DC voltage of bipolar parallel DC system, U dcSM Is the rated DC voltage of the first power module or the rated DC voltage of the second power module, P 1 Is the monopole active power transmission power of a first loop bipolar direct current system, P 2 Is the monopole active power transmission power of a second loop bipolar direct current system, alpha Udc Is the first direct current consumptionAnd the direct-current voltage action constant value of the device or the second direct-current energy consumption device is obtained, wherein t is the duration of the operation of the first direct-current energy consumption device or the second direct-current energy consumption device, and j=1, … and x.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02193543A (en) * | 1989-01-19 | 1990-07-31 | Shindengen Electric Mfg Co Ltd | Selective interception circuit for parallel operation dc power source device |
| CN108767890A (en) * | 2018-08-15 | 2018-11-06 | 中国电建集团华东勘测设计研究院有限公司 | Offshore wind power flexible DC power transmission system and its fault ride-through method with energy consumption dc chopper |
| CN109560564A (en) * | 2017-09-27 | 2019-04-02 | 南京南瑞继保电气有限公司 | A kind of method that flexible DC transmission bipolar DC system inhibits inverter overload |
| CN109873441A (en) * | 2019-03-29 | 2019-06-11 | 西安许继电力电子技术有限公司 | A kind of wind-powered electricity generation flexible direct current transmitting system with distributed DC energy-consuming device |
| WO2020094030A1 (en) * | 2018-11-07 | 2020-05-14 | 南京南瑞继保电气有限公司 | Energy-consuming device and control method therefor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127068A1 (en) * | 2012-02-29 | 2013-09-06 | 深圳市核达中远通电源技术有限公司 | Multi-input direct current converter and pfc circuit |
-
2021
- 2021-07-22 CN CN202110828800.2A patent/CN113708361B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02193543A (en) * | 1989-01-19 | 1990-07-31 | Shindengen Electric Mfg Co Ltd | Selective interception circuit for parallel operation dc power source device |
| CN109560564A (en) * | 2017-09-27 | 2019-04-02 | 南京南瑞继保电气有限公司 | A kind of method that flexible DC transmission bipolar DC system inhibits inverter overload |
| CN108767890A (en) * | 2018-08-15 | 2018-11-06 | 中国电建集团华东勘测设计研究院有限公司 | Offshore wind power flexible DC power transmission system and its fault ride-through method with energy consumption dc chopper |
| WO2020094030A1 (en) * | 2018-11-07 | 2020-05-14 | 南京南瑞继保电气有限公司 | Energy-consuming device and control method therefor |
| CN109873441A (en) * | 2019-03-29 | 2019-06-11 | 西安许继电力电子技术有限公司 | A kind of wind-powered electricity generation flexible direct current transmitting system with distributed DC energy-consuming device |
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