MMC-HVDC black start simulation test system and test method
A technology of MMC-HVDC, simulation test system, applied in the field of MMC-HVDC black-start simulation test system, can solve problems such as economic loss of enterprises, inconvenience of residents' daily life, power failure in power supply area, etc.
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Embodiment 1
[0032] Such as figure 1 As shown, the MMC-HVDC black start simulation test system includes the I-end converter station system and the II-end converter station system, and the I-end converter station system is connected to the II converter station system through a line simulation device. The core parts of the converter station at the II end are all MMCs, namely MMC1 and MMC2. Both the I-end converter station system and the II-end converter station system are real converter systems, and the power grids in the I-end converter station system and the II converter station system are both real power grids.
[0033] The connection line between the first power grid and the AC side of MMC1 in the I-end converter station system is sequentially connected in series with the first circuit breaker QF1, the first soft start device and the transformer T1, and the MMC2 in the II-end converter station system A transformer T2, a second soft start device, a second circuit breaker QF2 and a simula...
Embodiment 2
[0054] Compared with the above-mentioned embodiment, in this embodiment, the MMC-HVDC black start simulation test system does not include motors and generators, so there is only one way to supply power to the II-side control system—grid, and accordingly, the transfer switch does not need to be set , then, in the black start simulation test method based on this system, there is no relevant step of switching the power supply of the II-side control system.
[0055] Therefore, based on the simulation test system in this embodiment, the black start simulation test method generally includes the following steps:
[0056] (1), disconnect the simulation test switch K4, simulate the power failure of the II terminal system grid, and disconnect the circuit breaker switches QF1 and QF2;
[0057] (2), close the circuit breaker QF1, actively start MMC1, passively start MMC2, and the submodules in these two MMCs start charging;
[0058] (3) After the sub-modules in MMC1 and MMC2 are charged,...
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