Method and system for inhibiting voltage fluctuation of photovoltaic power station
A photovoltaic power station, voltage fluctuation technology, applied in photovoltaic power generation, AC network voltage adjustment, reactive power compensation, etc., can solve problems such as voltage fluctuation, affecting power quality, and affecting grid voltage flicker coefficient
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Embodiment 1
[0055] see figure 2 , which is a flow chart of Embodiment 1 of the method for suppressing voltage fluctuations in photovoltaic power plants provided by the present invention.
[0056] The method for suppressing voltage fluctuations in a photovoltaic power station provided in this embodiment is applied to a photovoltaic power station system, and the system includes at least the following two inverters: a first inverter and a second inverter; the first inverter passes The first transformer is connected to a common connection point, and the second inverter is connected to the common connection point through a second transformer; the method includes:
[0057] It should be noted that the method provided in this embodiment is applicable to a photovoltaic power station system in which multiple inverters are connected in parallel. The photovoltaic power station system can also use the method provided in this embodiment to suppress the voltage fluctuation of the PCC point.
[0058] ...
Embodiment 2
[0086] see image 3 , which is a flow chart of the manual mode of the method for suppressing voltage fluctuations in photovoltaic power plants provided by the present invention.
[0087] It should be noted that suppressing the voltage fluctuation at the PCC point may be performed in a manual mode or in an automatic mode. The specific implementation process of the manual mode is firstly introduced below.
[0088] S301: Judging that the current active power of the common connection point is greater than a second preset value;
[0089] It should be noted that there is no relationship between the first preset value and the second preset value, the first preset value may be greater than the second preset value, or the first preset value may be smaller than the second preset value. For example, in this embodiment, the first preset value is set to 0.1Pn, and the second preset value is set to 0.2Pn. The first preset value and the second preset value can be set according to actual n...
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