Journal of Shandong University(Engineering Science) ›› 2020, Vol. 50 ›› Issue (3): 98-103.doi: 10.6040/j.issn.1672-3961.0.2019.575

• Electrical Engineering • Previous Articles     Next Articles

Multi-infeed HVDC simultaneous commutation failure risk evaluation method considering synchronous condenser reactive power

Changhui MA1(),Liang WANG2,Shaoqing TAN3,Yi LU3,*(),Huan MA1,Kang ZHAO1   

  1. 1. State Grid Shandong Electric Power Research Institute, Jinan 250002, Shandong, China
    2. State Grid Shandong Electric Power Company, Jinan 250001, Shandong, China
    3. Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University), Jinan 250061, Shandong, China
  • Received:2019-10-08 Online:2020-06-20 Published:2020-06-16
  • Contact: Yi LU E-mail:machanghui@163.com;luyi_ee@mail.sdu.edu.cn
  • Supported by:
    国网山东省电力公司科技资助项目

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Abstract:

In order to improve the "Strong alternating current and weak direct current" characteristics of multi-infeed high voltage direct current systems, the synchronous condenser gradually gained attention.For the problem of multi-infeed high voltage direct current with synchronous condenser simultaneous commutation failure, a risk evaluation method considering the synchronous condenser reactive voltage characteristics was proposed. Firstly, the reactive voltage characteristics of the synchronous condenser were analyzed, and the multi-infeed interaction factor was calculated by reactive voltage sensitivity of the synchronous condenser, high voltage direct current system and static reactive power compensation device. Then, based on the nature of the commutation failure, the commutation failure evaluation factor was defined, and the simultaneous commutation failure risk of the multi-infeed high voltage direct current system with synchronous condenser was evaluated. Finally, the Shandong power grid was taken as an example to verify the results that the proposed method could effectively evaluate the multi-infeed high voltage direct current simultaneous commutation failure, and it was important in the early planning of the high voltage direct current transmission system and ensuring the stability and security of the power system.

Key words: multi-infeed HVDC, simultaneous multi-HVDC commutation failures, synchronous condenser, multi-infeed interaction factor, commutation failure estimate factor

CLC Number: 

  • TM721.1

Fig.1

Diagram of Shandong power grid under AC/DC access"

Table 1

The CFEF of Shangdong HVDC system"

直流名称昭沂低端昭沂高端鲁固低端鲁固高端银东直流
CFEF0.103 10.104 50.165 60.164 20.145 7

Table 2

MIIF of Shangdong HVDC system without synchronous condenser"

待评估直流故障直流
沂南智圣鸢都青州胶东
临特—0.355 670.264 280.571 400.433 38
智圣0.295 72—0.304 440.534 860.349 55
鸢都0.211 110.292 54—0.442 330.352 02
青州0.243 340.273 640.235 73—0.262 29
胶东0.215 510.208 940.219 100.306 58—

Table 3

MIIF of Shangdong HVDC system with synchronous condenser"

待评估直流故障直流
沂南智圣鸢都青州胶东
临特—0.355 190.263 320.570 020.432 20
智圣0.293 60—0.302 190.531 140.346 85
鸢都0.210 440.292 21—0.441 260.351 11
青州0.242 830.273 430.235 14—0.261 52
胶东0.215 110.208 730.218 640.305 85—

Fig.2

DC operation of Shandong grid after Zhisheng short-circuit"

Table 4

Simulation results of Shangdong DC system"

待评估直流故障直流
沂南智圣昌乐青州胶东
昭沂——换相失败换相失败换相失败
鲁固换相失败换相失败——换相失败
银东换相失败换相失败换相失败换相失败—
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