A kind of modular energy storage converter parallel and hot swap control method
An energy storage converter and control method technology, applied in the field of energy storage, can solve the problems of slow start-up of multi-modules, electrical impact of merging into the system, single working mode, etc., and achieve single working mode, maintenance of power quality, and combination mode flexible effects
Active Publication Date: 2022-07-08
PINGYANG ELECTRIC POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER +4
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[0004] The purpose of the present invention is to provide a method for paralleling and hot-swapping control of modular energy storage converters, which can effectively solve the problem of single working mode. In the case of multiple virtual synchronous modules, multiple modules can be started when running off-grid. Slow and incorporated into the system causing electrical shock issues
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[0025] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.
[0026] see figure 1 This is an embodiment of a modularized energy storage converter parallel connection and hot-swap control method of the present invention. The schematic structural diagram of the modular energy storage converter provided in the first embodiment of the present invention is only shown for the purpose of compilation and description. The parts related to this embodiment are described in detail as follows:
[0027] The first embodiment of the present invention provides that a modular energy storage converter system includes a plurality of energy storage units, and a plurality of module virtual synchronizers in which...
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The invention discloses a parallel and hot-swap control method of a modular energy storage converter. The modular energy storage converter is disconnected from the grid and is in the off-grid black start state. The upper-level controller simultaneously issues the power module grid-connected relay closing command, and adopts the automatic master selection strategy to generate the virtual synchronous machine of the master module, and the rest are slaves. The virtual synchronous machine controls the soft start of the virtual synchronous machine of the main module to establish the load voltage, and then the slave module virtual synchronous machine pulse unlocks and runs in parallel with the main virtual synchronous machine, so that each module of the modular energy storage converter can be quickly connected to the power grid and the load, solving the problem of In the traditional technical scheme, the working mode is single, the multi-module startup is slow and the integration into the system causes electrical shocks during off-grid operation, and good power quality is maintained.
Description
technical field [0001] The invention belongs to the technical field of energy storage, and in particular relates to a parallel and hot swap control method of a modular energy storage converter. Background technique [0002] The bidirectional energy storage DCAC converter, as the interface between the energy storage element in the energy storage system and the AC power grid, plays an important role in the entire energy storage system. In high-power and high-reliability applications, energy storage converters mostly use converter multi-module redundant parallel connection and hot-swap technology. The key problem to be solved in parallel and hot-swap control is to adopt reasonable and effective control measures to avoid strong inrush current during the input and withdrawal process of the converter module according to the parallel mode adopted by the converter and its current sharing strategy. And the electrical transient process, realize the smooth input and exit of the module...
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IPC IPC(8): H02J3/38H02J3/32H02M7/72H02J13/00
CPCH02J3/38H02J3/32H02M7/72H02J13/00016H02J2203/10Y02E40/70Y02E60/00Y04S10/12Y04S10/14Y02B90/20Y04S20/12Y04S40/124
Inventor 陈哲林厚飞廖鸿图黄益宏章雷其施亦治林启待项斌姜于杨忠伟詹小海丁勇郭勇
Owner PINGYANG ELECTRIC POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER