Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (9): 2096-2106.doi: 10.13229/j.cnki.jdxbgxb20220325

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Coordinated optimal dispatch strategy of wind and photovoltaic power generation and new energy vehicles

Miao-miao MA1(),Li-cheng LIU1,Xin WANG2,Mao YANG3   

  1. 1.School of Control and Computer Engineering，North China Electric Power University，Beijing 102206，China
    2.Beijing HiRain Technologies Co. ，Ltd. ，Beijing 100191，China
    3.Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology，Northeast Electric Power University，Ministry of Education，Jilin 132012，China
  • Received:2022-03-29 Online:2022-09-01 Published:2022-09-13

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Abstract:

A coordinated optimal dispatch strategy of wind and photovoltaic generation and new energy vehicles was proposed for the problem， which is caused by large-scale new energy vehicles disorderly charging in power grid. Firstly， the model of new energy vehicles power battery was built， and a calculation method of charging load based on Monte Carlo method was proposed. Secondly， based on the principle of wind and photovoltaic power generation， the mathematical models of wind power generation and photovoltaic power generation were established. Finally， The objective function of the dispatch strategy is to minimize the standard deviation of the comprehensive load of the power grid， and the active set algorithm was utilized to solve the quadratic programming problem to obtain the coordinated optimal dispatch strategy. The simulation results show that the strategy can effectively avoid the aggravating difference between peak and valley load， which is caused by large-scale new energy vehicles disorderly charging in power grid.

Key words: new energy vehicle, power battery, wind and photovoltaic generation, coordinated optimal

CLC Number: 

  • U469.72

Fig.1

Operating principle of power battery"

Fig.2

GNL equivalent circuit battery model"

Fig.3

Distribution of daily mileage of new energy vehicles"

Fig.4

Distribution of starting charging time of new energy vehicles"

Fig.5

Flow chart of proposed algorithm based on Monte Carlo simulation"

Fig.6

Operating principle of photovoltaic cell"

Fig.7

Output characteristics of photovoltaic cell"

Fig.8

Load curve of disorderly charging of new energy vehicles"

Fig.9

Influence of disordered charging onpower grid"

Fig.10

Average wind speed on a typical day"

Fig.11

Output power of wind power generation"

Fig.12

Output power of photovoltaic power generation"

Fig.13

Equivalent load curve considering renewable energy generation and disorderly charging of new energy vehicles"

Fig.14

Curve of orderly charging and discharging of new energy vehicles"

Fig.15

Comparison of charging load curves before and after optimization"

Fig.16

Comparison of microgrid load curves before and after optimization"

Table 1

Comparison of power grid indexes before and after optimization"

峰值负荷/kW谷值负荷/kW峰谷差/kW峰谷差率/%标准差/kW
基础负荷38001023277773973

计及无序

充电负荷

4633.7838.73795821390

协同优化

后总负荷

2646.81417.51229.346337
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