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| Analysis of Short Circuit Ratio Index Application in Multi-Infeed-HVDC Grid |
| Cheng Xin |
| Guangdong Electric Power Design Institute, China Energy Engineering Group Co., Ltd, Guangzhou 510663 |
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Abstract At present, HVDC has been the important form in the wide interconnected area and Large-capacity、long-distance transmission. The most number of the HVDC infeed has been formed in Guangdong Power Grid among South China Grid. The electric distance between DC inverter stations very closely and increase a lot of potential risk. South China Power Grid is used as the testing model in the paper, the voltage supporting ability of commutation bus in the multi-HVDC-infeed Guang Dong Power Grid is studied. SCRs are studied to make out if they have relationship with the voltage supporting strength of commutation bus before and after the DC latching fault. In SCR Index, there are two factors which are capacity of short circuit and HVDC power. As the BPA has been used to emulate, line’s length and the DC power continuously are adjusted to research the effect on the voltage stability of the receiving grid by the capacity of short circuit and HVDC power. As the static voltage drop level under DC and AC failure are emulated, different HVDC lines have been retained to adjust model, the effect on the voltage stability by different numbers of HVDC has been found out.
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Published: 20 April 2016
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2016, Vol. 17 
