Feasibility Evaluation for PV-Wind-Battery System to Be Black-Start Power Supply

doi:10.12204/j.issn.1000-7229.2020.09.004

Abstract

Abstract:

With the rapid growth of installed capacity of wind and photovoltaic power, wind farms and photovoltaic power stations equipped with energy storage have the conditions to be black-start power supply. Using PV-wind-battery system as black-start power supply can improve the black-start capacity of regional power grid. Therefore, this paper designs a feasible evaluation method for the PV-wind-battery system to be black-start power supply. First of all, the output power of the PV-wind-battery system is analyzed from the perspective of load demand of black start, and the support probability and existing problems of black start with PV-wind-battery system are obtained. Then, on the basis of the power prediction method and power evaluation index, the feasibility evaluation method for the PV-wind-battery system to be black-start power supply is designed. The reference value of output power of PV-wind-battery system is obtained by the power prediction method. The feasibility of the PV-wind-battery system to be black-start power supply is determined by the evaluation index of output power of PV-wind-battery system. Finally, using MATLAB simulation software, different scenarios are designed to verify the effectiveness of the feasibility evaluation. The results show that the output power of wind-solar-storage power generation system can meet the power requirements of black-start load when the execution probability inclination is greater than 1.

Key words: black start, photovoltaic-wind-battery system, feasibility evaluation, power prediction

CLC Number:

TM724

LI Junhui, YOU Hongfei, LI Cuiping, ZHANG Shining, QI Jun, ZHANG Hongguang, ZHANG Jiaxing, KONG Ming. Feasibility Evaluation for PV-Wind-Battery System to Be Black-Start Power Supply[J]. ELECTRIC POWER CONSTRUCTION, 2020, 41(9): 30-38.

Figures/Tables 17

Fig.1 Maximum power value curve of wind farm and PV power station in one day of the year

Fig.2 Daily output power curve of wind farm and PV power station

Fig.3 Principle of feasibility evaluation method

Fig.4 Framework of feasibility evaluation method

Table 1 Correlation coefficient between PV power output and input variable

Fig.5 Flow chart of feasibility evaluation method

Table 2 Simulation parameters

Table 3 Comparison of simulation results

Fig.6 Power of PV power station on typical day and black-start lower-limit power

Fig.7 Executive probability gradient curve of the black start on the typical day under the scenario of bright light and weak wind

Fig.8 PV power prediction results from 12:00 to 13:00

Fig.9 Power of wind farm on typical day and black-start lower-limit power

Fig.10 Executive probability gradient curve of the black start on the typical day under the scenario of strong wind and weak light

Fig.11 Wind power prediction results from 12:00 to 13:00

Fig.12 Total wind and PV power of typical day and black start lower limit power

Fig.13 Executive probability gradient curve of the black start on the typical day under the scenario of weak light and wind

Fig.14 Prediction results of total wind and PV power from 12:00 to 13:00

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