波动参数的多类型储能协同控制

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1.浙江大学电气工程学院浙江省电机系统智能控制与变流技术重点实验室;2.国网青海省电力公司果洛供电公司 青海省 果洛州

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国网青海省电力公司科技项目资助(106000003069); 浙江省教育厅科研项目(Y202045591)


Multi-type energy storage collaborative control based on wave parameters in microgrids with combined heat and power system
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1.College of Electrical Engineering Zhejiang University Zhejiang Provincial Key Laboratory of Electrical Machine Systems;2.Guoluo Power Supply Company

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    摘要:

    针对光伏可再生能源的消纳和波动,结合我国西北地区长期供电供热的需求,提出一种基于光伏功率波动特征的多类型储能协同控制方法。分析了光伏、热泵和混合储能的电-热联合微网的特点及能量转换方式。对于微网中热泵和混合储能平抑的光伏功率,根据波动的不同时间尺度,采用变参数的低通滤波方法处理,大时间尺度的出力波动由热泵进行平抑,中小时间尺度的波动则由混合储能进行平抑。其中,混合储能中的超级电容负责平抑小时间尺度的功率波动,蓄电池负责提供超级电容平抑后的功率,从而有效避免电池频繁的充放电。算例结果表明所述策略有效,系统灵活性较强。

    Abstract:

    In view of the absorption and fluctuation of the renewable energy and the long-term demand of power combined with heat supply in northwest China, a collaborative control method of multi-type energy storage system based on PV power fluc-tuation characteristics is proposed. The characteristics of the microgrid with combined heat and power system for heat-pump heating, PV power station and hybrid energy storage system and the energy conversion modes in the system are analyzed. For PV power stabilized by heat pump and hybrid energy storage system, low-pass filtering method with variable parameters is adopted to deal with the PV output fluctuations using different time scales of fluctuations. Output fluctuations of large time scales can be stabilized by heat-pump, while fluctuations of small and medium time scales can be stabilized by hybrid energy storage. In the hybrid energy storage system, battery provides the power after the super capacitor has sta-bilized the fluctuations. So it can avoid frequent charging and discharging of the battery. The results in the example show that the collaborative control strategy is effective and makes the system flexible.

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  • 收稿日期:2020-12-02
  • 最后修改日期:2021-05-02
  • 录用日期:2021-05-19
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