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This paper focused on a new type simulation platform. Restricted by the number of network nodes and time step, traditional all digital simulation platform is not fast enough for the modular multilevel converter Based HVDC (MMC-HVDC). This paper presented a real-time digital-analog hybrid simulation platform including 49-level MMC, described the method of calculating the proportion of the platform...
With the improvements of the voltage level and transmission capacity of power grid, the voltage level of the UHVDC project will increase. Therefore, China Electric Power Research Institute has completed the manufacture of the ±1100kV/5000A UHVDC valve, designed electric circuit, cooling system, valve tower structure in details and verified by type tests. The results show that the ±1100kV/5000A UHVDC...
Operational test is an important measure which can guarantee safe and stable operation of UHVDC thyristor valves. HVDC thyristor modules can be performed either in a six-pulse back-to-back test circuit or in a synthetic test circuit. UHVDC thyristor valves have a high power rating and are difficult to test in a back-to-back test circuit. A synthetic test circuit can reach a high capacity with few...
Recently, more and more attention has been paid to the power generation from renewable energy resources, such as wind energy, solar energy etc. As one of the interconnecting scheme with power grid of renewable energy resources, voltage source converter (VSC) has been gradually used in power system. Therefore, special attention has also been devoted to research about VSC, such as mathematics modeling,...
This paper proposes an electromagnetic transient model of the voltage source converter (VSC) based HVDC transmission converter station multi-legged transformer. Currently, three phase multi-legged converter transformers are often used in VSC-HVDC schemes. However, VSC-HVDC converter transformers are normally represented as magnetically and electrically independent single phase units when simulating...
This paper proposes an electromagnetic transient model and control strategy for the voltage source converter (VSC) based HVDC transmission. The electromagnetic transient model of the VSC AC-side in the synchronous d-q reference frame has been built; the DC-side dynamics are formulated based on the principle of instantaneous power balance, the instantaneous power absorbed by three-phase series inductors...
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