A Mobile Static Synchronous Compensator with Compact Structure Design
A static synchronous compensation and structural design technology, applied in the direction of reactive power adjustment/elimination/compensation, cooling/ventilation/heating transformation, flexible AC transmission system, etc. Save volume, increase device footprint, etc., to achieve the effects of compact design, clear potential distribution, and compact layout
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Embodiment 1
[0041] The basic principle of the mobile STATCOM is to take the voltage source converter (VSC) as the core, use the DC capacitor as the energy storage element on the DC side, and use the turn-off device IGBT to convert the DC side voltage into an AC voltage with the same frequency as the power grid, and By connecting the reactor in parallel with the power grid, properly adjusting the amplitude and phase of the output voltage on the AC side, or directly controlling the current on the AC side, the device can absorb or send out reactive current that meets the requirements, and realize dynamic reactive power compensation. Purpose. In order to form a practical large capacity and meet the requirements of low harmonics, the topology of the mobile STATCOM main circuit adopts figure 2 The chain structure shown is mainly composed of three-phase commutation chain, connecting reactor, starting resistor, main circuit breaker, isolating switch and so on. Each phase commutation chain is co...
Embodiment 2
[0043] The auxiliary equipment container 11 described in the present invention can be expanded into multiple containers according to the requirements of the functional module container 10, such as: control and protection system container, water cooling system container and starting circuit container, wherein the control and protection system container is used to implement the functional module container 10 control, detection and protection, the water cooling system container is used to ensure that the working junction temperature of the converter chain power device IGBT in the functional module container 10 does not exceed the maximum allowable junction temperature, and the starting circuit container is used to realize the soft start of the functional module container 10. And the arrangement of auxiliary equipment containers 11 can be set according to actual conditions.
[0044] In order to meet the needs of mobile engineering and facilitate transportation, the mobile STATCOM d...
Embodiment 3
[0046] The equipment in the STATCOM functional module container 10 mainly includes a single-phase commutation chain. Each phase commutation chain is composed of multiple chain link module units with the same structure in series. Each chain link unit is composed of a voltage source converter composed of an H bridge. The H bridge is composed of multiple IGBTs with antiparallel diodes. ,Such as Figure 4 shown. It mainly includes DC capacitor 1, H bridge circuit 2, discharge circuit 3, bypass circuit 4, energy harvesting power supply 5, unit controller 6, drive circuit 7, etc. In order to install the converter chain in a container with a small space, the chain link power module unit needs to adopt a compact design, optimize its layout, reduce the volume of the chain link unit and the volume occupied by the connection, so that the structure of the chain link unit has a small size and low weight. light features, employing such as Figure 5 The structural layout diagram shown. I...
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