Submodule With Sliding Busbars For MMC STATCOM Installation
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Solution Overview
Problem
The existing Modular Multilevel Converter (MMC) type STATCOM facilities face challenges in installation due to the complexity and space requirements of multiple submodules, making it difficult to manage power flow and system stability in limited spaces.
Innovation Solution
A submodule with a compact structure featuring a power pack and a capacitor pack that can be easily attached and detached using slidably inserted connection busbars, allowing for flexible electrical connection and improved accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple submodules are used in MMC type STATCOM, then power compensation function is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The patent combines the power pack and capacitor pack into a single integrated submodule unit. The power pack containing switching modules and the capacitor pack are merged through direct electrical connection via connection busbars, eliminating the need for separate modular assemblies and reducing overall system complexity while maintaining power compensation functionality.
Solution Approach 2:
The submodule is segmented into distinct functional packs (power pack and capacitor pack) that can be independently manufactured and then easily assembled. This segmentation allows for simplified production and maintenance while achieving the required power compensation through the coordinated operation of these modular components.
2Reliability
If multiple submodules are installed in limited space, then power system stability is improved, but installation space requirements worsen
Solution Approach 1:
By merging the power pack and capacitor pack into a single compact submodule, the patent reduces the installation footprint. The integrated design allows multiple submodules to be installed in limited spaces while still achieving the required power compensation capacity for system voltage stability.
Solution Approach 2:
The connection busbars are nested within the submodule structure, with the power pack and capacitor pack closely integrated. This nested arrangement minimizes the external dimensions of the submodule, enabling compact installation configurations that fit within limited spatial constraints.
3Reliability
If traditional connection methods are used between power pack and capacitor pack, then electrical connection is achieved, but attachment and detachment difficulty increase
Solution Approach 1:
The connection busbars are designed with flexible positioning capability, allowing them to be easily inserted into and removed from corresponding connection terminals. This dynamic connection mechanism enables simple attachment and detachment operations while maintaining reliable electrical connection during operation.
Solution Approach 2:
The connection busbars serve as intermediary elements between the power pack and capacitor pack. These busbars provide a simplified interface that facilitates easy connection and disconnection while ensuring stable electrical contact, acting as a mediator that resolves the complexity of direct pack-to-pack connection.
Data Source
AI summary
A submodule according to the present invention includes a power pack including a plurality of switching modules, first and second input busbars connected to the plurality of switching modules and protruding to a first outer side of the power pack, first and second connection busbars connected to the plurality of switching modules and protruding to a second outer side of the power pack, a capacitor pack including a capacitor element, and first and second connection units provided at both sides of one surface of the capacitor pack. The first and second connection busbars are inserted into the first and second connection units, respectively, such that the power pack and the capacitor pack are electrically connected to each other.