CN103280977A - Isolation type DC/DC (direct current/direct current) converter based on modularized multilevel current converter - Google Patents
Isolation type DC/DC (direct current/direct current) converter based on modularized multilevel current converter Download PDFInfo
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- CN103280977A CN103280977A CN2013100133920A CN201310013392A CN103280977A CN 103280977 A CN103280977 A CN 103280977A CN 2013100133920 A CN2013100133920 A CN 2013100133920A CN 201310013392 A CN201310013392 A CN 201310013392A CN 103280977 A CN103280977 A CN 103280977A
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Abstract
The invention provides an isolation type DC/DC (direct current/direct current) converter based on a modularized multilevel current converter. The converter comprises an input end modular multilevel current converter, a high-frequency transformer and an output end modular multilevel current converter, wherein the input end modular multilevel current converter is connected with the output end modular multilevel current converter through the high-frequency transformer. The input end modular multilevel current converter and the output end modular multilevel current converter respectively adopt MMC (multi media card) sub modules, high voltage is born, the voltage level is high, the transmission capacity is great, the expandability is high, in addition, the alternating current conversion link waveform distortion factor in the middle process is small, the harmonic wave content is low, and the electric isolation can be effectively realized on the input and output side of the converter.
Description
Technical field
The invention belongs to electric and electronic technical field, be specifically related to the isolated form DC/DC converter based on a kind of modularization multi-level converter.
Background technology
Along with the application that begins based on the flexible direct current of the multiterminal of voltage source converter (VSC) and direct current network technology, the DC/DC converter becomes one of key equipment that makes up direct current network.In AC system, AC transformer is utilized electromagnetic induction principle, when being connected with alternating current transformer schematic diagram stream in the elementary coil, just produces exchange flux in the iron core (or magnetic core), makes and induces voltage (or electric current) in the secondary coil.And in direct current system, voltage does not change direction, so the voltage transformation of direct current system is more than the difficulty of cut-offfing of alternating current.
As one of key equipment of direct current network, the main effect of DC/DC converter should comprise: 1. realize the connection of different electric pressure DC network; 2. can play the electrical isolation between different circuits or the system; 3. direction of tide is two-way controlled.DC/DC converter commonly used also comprises as harmonic technology topological structures such as striding capacitance technology.Wherein harmonic technology is used morely, simple in structure in middle low power DC/DC converter, and control is convenient, and efficient height, but can not block the propagation of fault, and resonant parameter debug difficulties are subject to the withstand voltage of thyristor, poor expandability simultaneously.The striding capacitance circuit, the voltage ratio between its input and output is restricted, and electric pressure and output no-load voltage ratio are higher, or capacity needs to adopt multiple-unit cascade when excessive, and control is complicated, poor reliability.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of isolated form DC/DC converter of modularization multi-level converter, input modularization multi-level converter and output modularization multi-level converter all adopt the MMC submodule, bear high voltage, the electric pressure height, transmission capacity is big, and extensibility is strong, and the exchange conversion link deviation factor of wave of pilot process is little, and harmonic content is low; Can effectively carry out electrical isolation to the input and output side of converter.
In order to realize the foregoing invention purpose, the present invention takes following technical scheme:
A kind of isolated form DC/DC converter based on modularization multi-level converter is provided, and described converter comprises input modularization multi-level converter, high frequency transformer and output modularization multi-level converter; Described input modularization multi-level converter is connected with the output modularization multi-level converter by high frequency transformer.The magnetic core of described high frequency transformer is by making based on iron-base amorphous alloy material.
Described input modularization multi-level converter and output modularization multi-level converter include the MMC submodule.
Described MMC submodule comprises that direct current capacitor, two igbt chips, two grading resistors and thyristor form; Wherein, two igbt chip series connection form the igbt chip series arm, two grading resistor series connection form the equalizing capacitance branch road, described igbt chip series arm, equalizing capacitance branch road and direct current capacitor parallel connection, described thyristor is in parallel with one of igbt chip, and its anode connects the negative pole of direct current capacitor, and negative electrode connects the positive pole of direct current capacitor, the negative electrode of thyristor is drawn the positive pole output of submodule, and the anode of thyristor is drawn the negative pole output of submodule.
The interchange side output frequency of described input modularization multi-level converter is 500～1000Hz.
The interchange side output frequency of described output modularization multi-level converter is 500～1000Hz.
The operating frequency of described high frequency transformer is 500～1000Hz.
The low-pressure end of described high frequency transformer has 2～3 taps.
Compared with prior art, beneficial effect of the present invention is:
1, converter both sides employing MMC submodule provided by the invention bears high voltage, the electric pressure height, and transmission capacity is big, and extensibility is strong, and is applied widely, and the exchange conversion link deviation factor of wave of pilot process is little, and harmonic content is low, and loss is low;
2, converter using high frequency transformer provided by the invention can effectively carry out electrical isolation to the input and output side of converter, also can effectively reduce volume and the cost of DC/DC converter.
Description of drawings
The electric topological diagram of DC/DC converter that Fig. 1 provides;
Fig. 2 is MMC submodule electrical structure diagram in the DC/DC converter provided by the invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
As Fig. 1, the invention provides a kind of isolated form DC/DC converter based on modularization multi-level converter, described converter comprises input modularization multi-level converter, high frequency transformer and output modularization multi-level converter; Described input modularization multi-level converter is connected with the output modularization multi-level converter by high frequency transformer.The magnetic core of described high frequency transformer is by making based on iron-base amorphous alloy material.
Described input modularization multi-level converter and output modularization multi-level converter include the MMC submodule.
As Fig. 2, described MMC submodule comprises that direct current capacitor, two igbt chips, two grading resistors and thyristor form; Wherein, two igbt chip series connection form the igbt chip series arm, two grading resistor series connection form the equalizing capacitance branch road, described igbt chip series arm, equalizing capacitance branch road and direct current capacitor parallel connection, described thyristor is in parallel with one of igbt chip, and its anode connects the negative pole of direct current capacitor, and negative electrode connects the positive pole of direct current capacitor, the negative electrode of thyristor is drawn the positive pole output of submodule, and the anode of thyristor is drawn the negative pole output of submodule.
The interchange side output frequency of described input modularization multi-level converter is 500～1000Hz.
The interchange side output frequency of described output modularization multi-level converter is 500～1000Hz.
The operating frequency of described high frequency transformer is 500～1000Hz.
The low-pressure end of described high frequency transformer has 2～3 taps.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. isolated form DC/DC converter based on modularization multi-level converter, it is characterized in that: described converter comprises input modularization multi-level converter, high frequency transformer and output modularization multi-level converter; Described input modularization multi-level converter is connected with the output modularization multi-level converter by high frequency transformer, and the magnetic core of described high frequency transformer is by making based on iron-base amorphous alloy material.
2. the isolated form DC/DC converter based on modularization multi-level converter according to claim 1, it is characterized in that: described input modularization multi-level converter and output modularization multi-level converter include the MMC submodule.
3. the isolated form DC/DC converter based on modularization multi-level converter according to claim 2 is characterized in that: described MMC submodule comprises that direct current capacitor, two igbt chips, two grading resistors and thyristor form; Wherein, two igbt chip series connection form the igbt chip series arm, two grading resistor series connection form the equalizing capacitance branch road, described igbt chip series arm, equalizing capacitance branch road and direct current capacitor parallel connection, described thyristor is in parallel with one of igbt chip, and its anode connects the negative pole of direct current capacitor, and negative electrode connects the positive pole of direct current capacitor, the negative electrode of thyristor is drawn the positive pole output of submodule, and the anode of thyristor is drawn the negative pole output of submodule.
4. the isolated form DC/DC converter based on modularization multi-level converter according to claim 2, it is characterized in that: the interchange side output frequency of described input modularization multi-level converter is 500～1000Hz.
5. the isolated form DC/DC converter based on modularization multi-level converter according to claim 2, it is characterized in that: the interchange side output frequency of described output modularization multi-level converter is 500～1000Hz.
6. the isolated form DC/DC converter based on modularization multi-level converter according to claim 1, it is characterized in that: the operating frequency of described high frequency transformer is 500～1000Hz.
7. the isolated form DC/DC converter based on modularization multi-level converter according to claim 1, it is characterized in that: the low-pressure end of described high frequency transformer has 2～3 taps.
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| CN2013100133920A CN103280977A (en) | 2013-01-15 | 2013-01-15 | Isolation type DC/DC (direct current/direct current) converter based on modularized multilevel current converter |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701349A (en) * | 2013-12-21 | 2014-04-02 | 华南理工大学 | H-bridge modular unit series combination single-phase high-voltage transformer and multi-level control method |
| CN104158401A (en) * | 2014-07-25 | 2014-11-19 | 清华大学 | Modularized DC solid-state transformer for power transmission and distribution of high-voltage DC |
| CN104283436A (en) * | 2014-09-24 | 2015-01-14 | 华中科技大学 | Combined type MMC type direct current transformer based on transformer coupling |
| CN104485821A (en) * | 2014-11-18 | 2015-04-01 | 浙江大学 | Direct current transformer device used for power distribution |
| CN104811063A (en) * | 2015-05-04 | 2015-07-29 | 华北电力大学 | Modular multilevel converter control method based on multicore controller technology |
| CN104917393A (en) * | 2015-06-09 | 2015-09-16 | 合肥科威尔电源系统有限公司 | Photovoltaic and energy-storage integrated DC converter structure based on MMC technology |
| CN104935175A (en) * | 2015-06-16 | 2015-09-23 | 上海交通大学 | Improved two-level modulation method of isolated-form modularization multi-level direct current converter |
| CN105356756A (en) * | 2015-11-16 | 2016-02-24 | 上海交通大学 | Quasi-square wave modulation method for modularized isolation type battery energy storage converter |
| CN105375776A (en) * | 2015-11-16 | 2016-03-02 | 上海交通大学 | Sine wave modulation method for modular isolated battery energy storage converter |
| CN105391303A (en) * | 2015-11-16 | 2016-03-09 | 上海交通大学 | Rectangular wave modulation method for modular isolation type battery energy storage converter |
| WO2016070378A1 (en) * | 2014-11-06 | 2016-05-12 | Abb Technology Ltd | Method and controller for controlling capacitor voltage balancing in modular dc/dc converter and modular dc/dc converter system |
| DE102015209948A1 (en) * | 2015-05-29 | 2016-12-01 | Siemens Aktiengesellschaft | Voltage transformer arrangement with capacitive coupling |
| CN107546983A (en) * | 2017-01-17 | 2018-01-05 | 湖南大学 | A kind of high-power high no-load voltage ratio modularization two-way DC converter of isolated form |
| EP3291432A1 (en) * | 2016-09-06 | 2018-03-07 | Siemens Aktiengesellschaft | Dual-active-bridge with modular multilevel bridges |
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| CN1545194A (en) * | 2003-11-19 | 2004-11-10 | 南京航空航天大学 | Cascading bidirectional DC-DC converter |
| CN102130612A (en) * | 2010-12-20 | 2011-07-20 | 中国电力科学研究院 | Integrated control sub-module board for simulating multi-level modular converter (MMC) sub-module |
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2013
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| CN102130612A (en) * | 2010-12-20 | 2011-07-20 | 中国电力科学研究院 | Integrated control sub-module board for simulating multi-level modular converter (MMC) sub-module |
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701349A (en) * | 2013-12-21 | 2014-04-02 | 华南理工大学 | H-bridge modular unit series combination single-phase high-voltage transformer and multi-level control method |
| CN103701349B (en) * | 2013-12-21 | 2017-04-12 | 华南理工大学 | H-bridge modular unit series combination single-phase high-voltage transformer and multi-level control method |
| CN104158401A (en) * | 2014-07-25 | 2014-11-19 | 清华大学 | Modularized DC solid-state transformer for power transmission and distribution of high-voltage DC |
| CN104283436A (en) * | 2014-09-24 | 2015-01-14 | 华中科技大学 | Combined type MMC type direct current transformer based on transformer coupling |
| WO2016070378A1 (en) * | 2014-11-06 | 2016-05-12 | Abb Technology Ltd | Method and controller for controlling capacitor voltage balancing in modular dc/dc converter and modular dc/dc converter system |
| CN104485821A (en) * | 2014-11-18 | 2015-04-01 | 浙江大学 | Direct current transformer device used for power distribution |
| CN104811063A (en) * | 2015-05-04 | 2015-07-29 | 华北电力大学 | Modular multilevel converter control method based on multicore controller technology |
| CN104811063B (en) * | 2015-05-04 | 2017-08-04 | 华北电力大学 | Modularization multi-level converter control method based on multinuclear controller technology |
| DE102015209948A1 (en) * | 2015-05-29 | 2016-12-01 | Siemens Aktiengesellschaft | Voltage transformer arrangement with capacitive coupling |
| CN104917393A (en) * | 2015-06-09 | 2015-09-16 | 合肥科威尔电源系统有限公司 | Photovoltaic and energy-storage integrated DC converter structure based on MMC technology |
| CN104917393B (en) * | 2015-06-09 | 2018-02-16 | 合肥科威尔电源系统有限公司 | A kind of photovoltaic energy storage integrated DC converter structure based on MMC technologies |
| CN104935175B (en) * | 2015-06-16 | 2017-08-01 | 上海交通大学 | The Level modulation scheme of improvement two of isolated form modular multilevel DC converter |
| CN104935175A (en) * | 2015-06-16 | 2015-09-23 | 上海交通大学 | Improved two-level modulation method of isolated-form modularization multi-level direct current converter |
| CN105356756A (en) * | 2015-11-16 | 2016-02-24 | 上海交通大学 | Quasi-square wave modulation method for modularized isolation type battery energy storage converter |
| CN105391303A (en) * | 2015-11-16 | 2016-03-09 | 上海交通大学 | Rectangular wave modulation method for modular isolation type battery energy storage converter |
| CN105375776A (en) * | 2015-11-16 | 2016-03-02 | 上海交通大学 | Sine wave modulation method for modular isolated battery energy storage converter |
| CN105375776B (en) * | 2015-11-16 | 2018-03-23 | 上海交通大学 | A kind of sine wave modulation method of modularization isolated form battery energy storage converter |
| CN105356756B (en) * | 2015-11-16 | 2018-05-11 | 上海交通大学 | A kind of quasi-square wave modulator approach of modularization isolated form battery energy storage converter |
| CN105391303B (en) * | 2015-11-16 | 2018-05-11 | 上海交通大学 | A kind of rectangular wave modulator approach of modularization isolated form battery energy storage converter |
| EP3291432A1 (en) * | 2016-09-06 | 2018-03-07 | Siemens Aktiengesellschaft | Dual-active-bridge with modular multilevel bridges |
| WO2018046231A1 (en) * | 2016-09-06 | 2018-03-15 | Siemens Aktiengesellschaft | Dual-active bridge with modular multipoint bridges |
| CN107546983A (en) * | 2017-01-17 | 2018-01-05 | 湖南大学 | A kind of high-power high no-load voltage ratio modularization two-way DC converter of isolated form |
| CN107546983B (en) * | 2017-01-17 | 2019-08-02 | 湖南大学 | A kind of high-power high no-load voltage ratio modularization two-way DC converter of isolated form |
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Effective date of registration: 20170527 Address after: 102200 Beijing city Changping District South Shao Zhen Nan Road No. 16 Applicant after: China-EPRI Electric Power Engineering Co., Ltd. Applicant after: State Grid Corporation of China Address before: 102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city) Applicant before: State Grid Smart Grid Institute Applicant before: China-EPRI Electric Power Engineering Co., Ltd. Applicant before: State Grid Corporation of China |
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