Journal of Shandong University(Engineering Science) ›› 2018, Vol. 48 ›› Issue (6): 109-115.doi: 10.6040/j.issn.1672-3961.0.2018.260

• Electrical Engineering • Previous Articles     Next Articles

Restrictions and countermeasures of distributed PV integration based on secondary battery energy storage system

Fei WANG1(),Chunyi WANG1,Chuanyong WANG2,Guangfeng ZHAO1,Mu LI3,Xiaohan SHI4,*()   

  1. 1. State Grid Shandong Electric Power Company, Jinan 250001, Shandong, China
    2. Zaozhuang Power Supply Company, State Grid Shandong Electric Power Company, Zaozhuang 277100, Shandong, China
    3. Economic & Technology Research Institute, State Grid Shandong Electric Power Company, Jinan 250000, Shandong, China
    4. Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University), Jinan 250061, Shandong, China
  • Received:2018-06-26 Online:2018-12-20 Published:2018-12-26
  • Contact: Xiaohan SHI E-mail:wf6102@163.com;shixh@sdu.edu.cn
  • Supported by:
    国网山东省电力公司科技资助项目(2017A18)

Abstract:

The distributed PV in rural areas was taken as object, the main factors limiting the integration of the PV generation was analyzed and the feasible solution was proposed based on secondary battery energy storage system. The weakness of distributed PV integration was analyzed from the points of view of primary equipment capacity, voltage control and fluctuation of PV output power. The investment model of grid upgrading and energy storage installation was built, based on which the economic comparison was carried out and the countermeasure based on secondary battery energy storage system was proposed. A prototype of secondary battery energy storage system adopting dynamic group theory was developed and the field test was carried out. The results demonstrated that the prototype could reduce the variance of the photovoltaic power by 35% as well as reduced the maximum peak and peak difference by 60%. The prototype could also reduce the peak and valley difference of the transformer by 20% and the load rate by 12%, which could effectively support the distribution of distributed PV.

Key words: secondary battery energy storage, distributed photovoltaic, PV griding restriction and countermeasure, peak shaving, power fluctuation leveling

CLC Number: 

  • TM734

Fig.1

Typical wiring diagrams of rural distribution network and distributed photovoltaic"

Fig.2

Load curves of transformer under different load level and number of PV users"

Fig.3

Voltage curves of different load points in distribution network with PV"

Fig.4

Typical daily output curve of PV"

Fig.5

Fitting result of typical PV daily output power"

Fig.6

Relationship between investment of different countermeasures and PV capacity"

Fig.7

Principle diagram of secodary battery storage system"

Fig.8

Photo of secondary battery energy storage prototype"

Fig.9

Wiring diagram of field test"

Fig.10

Photos of field test devices"

Fig.11

Results of fluctuation smoothing test"

Fig.12

Results of peck-shaving and vally-filling test"

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