The invention relates to a charging and discharging power adjusting method and a direct-current converter system, a power battery in the system is connected with a power grid through a direct-current converter and a converter, the direct-current converter and the converter are connected through a direct-current bus, a connection point between the converter and the power grid is a grid-connected point, and an alternating-current load is connected with the grid-connected point. Determining the charging and discharging states of the direct-current converter, and comparing the sum of the charging power of the direct-current converter and the working power of the alternating-current load with the input power limit value of the grid-connected point according to the charging and discharging states of the direct-current converter; or comparing the difference between the discharge power of the direct-current converter and the working power of the alternating-current load with the output power limit value of the grid-connected point, and adjusting and controlling the output power reference values of the direct-current converter and the converter according to the comparison result. The charging and discharging efficiency of the power battery can be improved, and the influence on the stability of a power grid in the charging and discharging process of the power battery can be reduced.
本发明涉及一种充放电功率调节方法、直流变换器系统,系统中的动力电池经直流变换器、变流器与电网相连,直流变换器与变流器之间通过直流母线相连,变流器与电网间的连接点为并网点,交流负载与并网点相连,其中,确定直流变换器的充放电状态,根据直流变换器的所述充放电状态或者将直流变换器的充电功率与交流负载的工作功率之和与并网点输入功率限制值比较,或者将直流变换器的放电功率与交流负载的工作功率之差与并网点输出功率限制值比较,根据比较结果调整控制直流变换器与变流器的输出功率参考值。本申请不但能够提高动力电池充放电效率,能够降低动力电池充放电过程中对电网稳定性的影响。
Charging and discharging power adjusting method and direct current converter system
一种充放电功率调节方法、直流变换器系统
23.05.2025
Patent
Elektronische Ressource
Chinesisch
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