Novel modular multilevel converter submodule topology circuit and control method thereof
A modular multi-level, topological circuit technology, applied in the direction of converting AC power input to DC power output, electrical components, output power conversion devices, etc., can solve the problem of MMC power switch sub-module damage, weak fault current suppression ability, Reduce the reliability of the inverter and other issues, achieve strong fault current suppression capabilities, avoid power switching devices, and suppress fault current effects
A modular multi-level, topological circuit technology, applied in the direction of converting AC power input to DC power output, electrical components, output power conversion devices, etc., can solve the problem of MMC power switch sub-module damage, weak fault current suppression ability, Reduce the reliability of the inverter and other issues, achieve strong fault current suppression capabilities, avoid power switching devices, and suppress fault current effects
CN110417290AActive Publication Date: 2019-11-05JIANGSU ELECTRIC POWER CO +2
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[0058] Attached below Figure 1-5 To further illustrate the present invention,
[0059] Such as figure 1 As shown, the present invention includes an incoming line port X and an outgoing line port Y, at least two half-bridge sub-modules are connected in series between the incoming line port X and the outgoing line port Y, and the half-bridge sub-module has an input port, an output port and output port two,
[0060] A switch device is provided at the front end of each half-bridge sub-module input port,
[0061] A thyristor is provided at the front end of each half-bridge sub-module output port 1;
[0062] At the rear end of the last sub-module, a thyristor at the end and a switch device at the end are also connected in parallel;
[0063] A diode is connected between the output port 1 of the front terminal module and the output port 2 of the rear terminal module in two adjacent sub-modules;
[0064] A head-end diode is connected between the incoming line port X and the outpu...
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The invention discloses a novel modular multilevel converter submodule topology circuit and a control method thereof. The invention relates to the field of power system DC power transmission and distribution protection control, in particular to an MMC sub-module topology circuit with DC side fault ride-through capability and a control method thereof. The invention provides the novel modular multilevel converter sub-module topology circuit is high in modular degree, higher in reliability, higher in forward and reverse fault current suppression capacity and more balanced and the control method thereof. The circuit comprises a wire inlet port X and a wire outlet port Y, wherein at least two half-bridge sub-modules are connected in series between the wire inlet port X and the wire outlet portY, each half-bridge sub-module is provided with an input port, a first output port and a second output port, and the power switch device can be an IGBT or an MOSFET. The circuit has very strong faultcurrent suppression capability.
Description
technical field [0001] The invention relates to the field of protection and control of direct current transmission and distribution of power systems, in particular to an MMC sub-module topology circuit with direct current side fault ride-through capability and a control method thereof. Background technique [0002] With the continuous increase of new energy power generation and DC load, the application of DC transmission and distribution network and AC-DC hybrid distribution network is getting more and more attention. The modular multilevel converter (MMC) is popular at home and abroad because of its simple modular structure, good scalability, low switching frequency, low loss, good harmonic characteristics and power quality regulation ability. Scholars welcome, and are widely used in DC transmission system and DC power distribution system. However, although the MMC with the traditional half-bridge sub-module structure has a low number of components and low cost and loss, i...
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Patent Timeline
05 Nov 2019
Publication
CN110417290A
- IPC
- H02M7/483; H02M1/32
- CPC
- H02M7/483; H02M1/32; H02M7/4835; Y02E60/60; H02M1/325; H02M7/145; H02M7/53871
- Inventors
- 刘忠; 许扬