CN110932263A - Flexible multi-state switching device based on turn-off power electronic switching device - Google Patents
Flexible multi-state switching device based on turn-off power electronic switching device Download PDFInfo
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- CN110932263A CN110932263A CN201911201140.4A CN201911201140A CN110932263A CN 110932263 A CN110932263 A CN 110932263A CN 201911201140 A CN201911201140 A CN 201911201140A CN 110932263 A CN110932263 A CN 110932263A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 49
- 238000004891 communication Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 3
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- 238000010248 power generation Methods 0.000 description 4
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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
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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
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
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Abstract
The invention relates to a flexible multi-state switching device based on a turn-off power electronic device, which is characterized in that: the device comprises a direct current positive and negative electrode bus, a control module, a direct current voltage/current measuring module, an alternating current voltage/current measuring module, a communication module, a plurality of AC/DC conversion modules and a DC/DC conversion module. The invention realizes the control of power energy flow and the fusion of information flow, realizes the closed loop operation of the power distribution network with the same voltage class and different voltage classes, realizes the access of direct current electric equipment and direct current power supplies with different voltage classes, and further can improve the tidal current characteristic and the electric energy quality of the power distribution network.
Description
Technical Field
The invention belongs to the technical field of intelligent equipment, relates to a flexible multi-state switch, and particularly relates to a flexible multi-state switch device based on a turn-off power electronic switch device.
Background
The distribution network is located at the end of the power system, directly faces to power users, and undertakes the tasks of distributing electric energy and serving the customers. At present, the power distribution network is lagged in construction, unreasonable in structure and limited in regulation and control means, so that the flexibility of operation control of the power distribution network is restricted, and the problems of unbalanced load of a feeder line, long power supply recovery time and the like are caused. On the other hand, new energy sources such as photovoltaic power generation, wind power generation and fuel cells are developed vigorously, but the new energy sources have the characteristics of intermittence and regionality, and in order to improve the consumption of the energy sources, energy storage equipment is required to be added, and a power grid is changed from centralized power generation to distributed power generation to buffer and consume the new energy sources. The existing power distribution network is facing to great challenges in various aspects such as customization and diversification of power consumption requirements, large-scale access of distributed power supplies, complicated trend coordination control and the like. The problems are difficult to be simultaneously and effectively solved by adopting conventional regulation and control means such as a conventional switch and the like.
The flexible multi-state switch adopts a new power electronic technology, and compared with a conventional switch, the flexible multi-state switch not only has two states of on-off, but also has the continuous controllable state of power, has the characteristics of flexible switching of operation modes, flexible and various control modes and the like, can avoid the problems of power supply interruption, loop closing impact and the like caused by switching operation of the conventional switch, can also relieve voltage dip and three-phase imbalance, promotes the balance of feeder load distribution and the improvement of electric energy quality, and provides key technology and equipment support for the implementation of a future intelligent power distribution network.
The working principle of the existing flexible multi-state switch is as follows: the alternating current is converted into direct current through AC/DC conversion, the direct current is converted into alternating current through DC/AC conversion, two direct current buses are connected with a plurality of AC/DC conversion modules, electric energy flows from one alternating current port to the other alternating current port, due to the adoption of a topological structure of common direct current buses, the equipment connected to the alternating current port is required to be in the same voltage grade, and the direct current equipment can only be connected to the direct current buses and has the same voltage grade as the direct current buses.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a flexible multi-state switch device based on a turn-off power electronic switch device, and solves the technical problem that the conventional flexible multi-state switch has high requirement on the voltage of accessible equipment.
The invention solves the practical problem by adopting the following technical scheme:
a flexible multi-state switching device based on a turn-off power electronic device comprises direct-current positive and negative electrode buses, a control module, a direct-current voltage/current measuring module, an alternating-current voltage/current measuring module, a communication module, a plurality of AC/DC conversion modules and a plurality of DC/DC conversion modules;
the direct-current positive and negative buses are connected with the direct-current interface module through the DC/DC conversion module and used for realizing the conversion of the direct-current voltage grade; the direct-current positive and negative electrode bus is also connected with the alternating-current interface module through the AC/DC conversion module and is used for realizing the conversion of direct-current energy and alternating-current energy; the direct-current positive and negative electrode buses are also connected with the alternating-current interface module through the DC/DC conversion module and the AC/DC conversion module in sequence and are used for realizing the conversion between direct current and alternating-current energy of another voltage class; the direct current positive and negative electrode buses are also connected with the direct current interface module and used for directly realizing direct current energy transmission; the control module is respectively connected with the AC/DC conversion modules and the DC/DC conversion modules and is used for controlling the AC/DC conversion modules and the DC/DC conversion modules to fully control the on-off of the power electronic devices; the control module is respectively connected with the alternating current voltage/current measuring module and the direct current voltage/current measuring module and is used for collecting current and voltage information to realize module control.
And the control module is also sequentially connected with the communication module and the communication interface module and used for receiving an external control signal and sending a self running state signal.
The invention has the advantages and beneficial effects that:
the invention provides a flexible multi-state switching device based on a turn-off power electronic switching device, which can enable the accessed direct current electrical equipment to have multiple voltage grades to be selectable through a DC/DC conversion module; the AC/DC module and the DC/DC module can enable the accessed AC electric equipment to have various voltage levels to be selectable; the invention can be connected with a load and a power supply, and can be connected with direct current equipment and alternating current equipment, wherein the alternating current equipment has several voltage grades to be selected, and the direct current equipment also has several voltage grades to be selected. The invention realizes the control of power energy flow and the fusion of information flow, realizes the closed loop operation of the power distribution network with the same voltage class and different voltage classes, realizes the access of direct current electric equipment and direct current power supplies with different voltage classes, and further can improve the tidal current characteristic and the electric energy quality of the power distribution network.
Drawings
Fig. 1 is a circuit block diagram of the present invention.
Detailed Description
The embodiments of the invention will be described in further detail below with reference to the accompanying drawings:
a flexible multi-state switch device based on a turn-off power electronic device is shown in figure 1 and comprises a direct current positive and negative electrode bus, a control module, a direct current voltage/current measuring module, an alternating current voltage/current measuring module, a communication module, a plurality of AC/DC conversion modules and a plurality of DC/DC conversion modules;
the direct-current positive and negative buses are connected with the direct-current interface module through the DC/DC conversion module and used for realizing the conversion of the direct-current voltage grade; the direct-current positive and negative electrode bus is also connected with the alternating-current interface module through the AC/DC conversion module and is used for realizing the conversion of direct-current energy and alternating-current energy; the direct-current positive and negative electrode buses are also connected with the alternating-current interface module through the DC/DC conversion module and the AC/DC conversion module in sequence and are used for realizing the conversion between direct current and alternating-current energy of another voltage class; the direct current positive and negative electrode buses are also connected with the direct current interface module and used for directly realizing direct current energy transmission; the control module is respectively connected with the AC/DC conversion modules and the DC/DC conversion modules and is used for controlling the AC/DC conversion modules and the DC/DC conversion modules to fully control the on-off of the power electronic devices; the control module is respectively connected with the alternating current voltage/current measuring module and the direct current voltage/current measuring module and is used for collecting current and voltage information to realize module control.
In this embodiment, the control module is further sequentially connected to the communication module and the communication interface module, and is configured to receive an external control signal and send a self-operation status signal.
In this embodiment, the DC positive and negative busbars are respectively connected to one port of the DC/DC module or one port of the AC/DC module; the direct current interface of the flexible multi-state switch is connected with the other port of the DC/DC conversion module or directly connected with a direct current bus; the AC/DC conversion module is respectively connected with the DC/DC module and the alternating current interface or connected with the direct current positive and negative electrode buses and the alternating current interface. The control module controls the on-off of the AC/DC and DC/DC module full-control turn-off power electronic device; the control module is connected with the alternating voltage/current measuring module, the direct voltage/current measuring module and the communication module; the communication module is connected with the communication interface.
The alternating current electrical equipment is connected with an alternating current interface of the flexible multi-state switch; the direct current electrical equipment is connected with a direct current interface of the flexible multi-state switch; the rated voltage of the direct current bus is unchanged; the DC/DC conversion module can enable the accessed direct current electrical equipment to have multiple voltage grades to be selectable; the AC/DC module and the DC/DC module can enable the accessed AC electric equipment to have various voltage levels to be selectable; the control module receives signals of the direct current voltage/current measuring module, the alternating current voltage/current module and the communication module and controls the on-off of the AC/DC module and the DC/DC module to fully control the turn-off power electronic device so as to realize electric energy conversion; the communication module receives an external control signal and sends out a self running state signal.
It should be emphasized that the examples described herein are illustrative and not restrictive, and thus the present invention includes, but is not limited to, those examples described in this detailed description, as well as other embodiments that can be derived from the teachings of the present invention by those skilled in the art and that are within the scope of the present invention.
Claims (2)
1. A flexible multi-state switching device based on turn-off power electronics, characterized in that: the device comprises a direct current positive and negative electrode bus, a control module, a direct current voltage/current measuring module, an alternating current voltage/current measuring module, a communication module, a plurality of AC/DC conversion modules and a DC/DC conversion module;
the direct-current positive and negative buses are connected with the direct-current interface module through the DC/DC conversion module and used for realizing the conversion of the direct-current voltage grade; the direct-current positive and negative electrode bus is also connected with the alternating-current interface module through the AC/DC conversion module and is used for realizing the conversion of direct-current energy and alternating-current energy; the direct-current positive and negative electrode buses are also connected with the alternating-current interface module through the DC/DC conversion module and the AC/DC conversion module in sequence and are used for realizing the conversion between direct current and alternating-current energy of another voltage class; the direct current positive and negative electrode buses are also connected with the direct current interface module and used for directly realizing direct current energy transmission; the control module is respectively connected with the AC/DC conversion modules and the DC/DC conversion modules and is used for controlling the AC/DC conversion modules and the DC/DC conversion modules to fully control the on-off of the power electronic devices; the control module is respectively connected with the alternating current voltage/current measuring module and the direct current voltage/current measuring module and is used for collecting current and voltage information to realize module control.
2. A flexible multi-state switch arrangement based on turn-off power electronics, according to claim 1, characterized in that: the control module is also sequentially connected with the communication module and the communication interface module and used for receiving external control signals and sending self running state signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201140.4A CN110932263A (en) | 2019-11-29 | 2019-11-29 | Flexible multi-state switching device based on turn-off power electronic switching device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911201140.4A CN110932263A (en) | 2019-11-29 | 2019-11-29 | Flexible multi-state switching device based on turn-off power electronic switching device |
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| CN110932263A true CN110932263A (en) | 2020-03-27 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017638A (en) * | 2017-05-23 | 2017-08-04 | 杭州电子科技大学 | A kind of many bus electric energy router topological structures of multiport suitable for power distribution network |
| CN207069581U (en) * | 2017-07-21 | 2018-03-02 | 国网天津市电力公司电力科学研究院 | A kind of electric energy router based on electronic power switch device |
| CN108258676A (en) * | 2016-12-29 | 2018-07-06 | 中国电力科学研究院 | Complete controllable flexibly distribution system and method based on direct current multiport electric energy exchanger |
| CN109066686A (en) * | 2018-08-08 | 2018-12-21 | 中国科学院电工研究所 | A kind of flexible switch station interconnection architecture with the comprehensive distribution of a variety of electric energy |
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2019
- 2019-11-29 CN CN201911201140.4A patent/CN110932263A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258676A (en) * | 2016-12-29 | 2018-07-06 | 中国电力科学研究院 | Complete controllable flexibly distribution system and method based on direct current multiport electric energy exchanger |
| CN107017638A (en) * | 2017-05-23 | 2017-08-04 | 杭州电子科技大学 | A kind of many bus electric energy router topological structures of multiport suitable for power distribution network |
| CN207069581U (en) * | 2017-07-21 | 2018-03-02 | 国网天津市电力公司电力科学研究院 | A kind of electric energy router based on electronic power switch device |
| CN109066686A (en) * | 2018-08-08 | 2018-12-21 | 中国科学院电工研究所 | A kind of flexible switch station interconnection architecture with the comprehensive distribution of a variety of electric energy |
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