Self-generating and self-using distributed photovoltaic power station reverse power control module, method and system
A distributed photovoltaic, self-generated and self-used technology, applied in photovoltaic modules, photovoltaic system monitoring, photovoltaic power generation and other directions, can solve problems such as power grid reverse power transmission, improve accuracy and real-time performance, strict control logic, and meet reverse power requirements. The effect of control requirements
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Embodiment 1
[0057] figure 1 It is a schematic flow diagram of Embodiment 1 of the present invention. Such as figure 1 As shown, the reverse power control method of the self-contained distributed photovoltaic power station in Embodiment 1 includes:
[0058] ST101. Determine whether there is reverse power; retrieve the relationship between the active power P of the main incoming line switch of the factory and the maximum threshold TripP of the reverse power sent by the factory.
[0059] ST1011. When P>TripP, it means that the active power P of the total incoming switch of the factory is greater than the maximum threshold TripP of the factory’s reverse power, and a reverse power situation has occurred, an alarm signal is generated, and a shutdown command is issued to all inverters that are in normal communication and powered on , and set the inverter power setting value NBQPset of the shutdown inverter to the minimum. The minimum inverter power setting value NBQPset is the inverter minimu...
Embodiment 2
[0070] figure 2 It is a schematic flow diagram of Embodiment 2 of the present invention. Such as figure 2 As shown, in Embodiment 2, the reverse power control method of the self-contained distributed photovoltaic power station includes:
[0071] ST201. The inverse power control starts, and the steps of judging the communication status of the equipment and calculating related data are carried out, and the operation period is 1ms.
[0072] ST2011. Judging the reverse power reference object, that is, the communication status of the main incoming line switchgear of the factory; judging the communication status of all power generation equipment in the power station, that is, the inverter; judging the communication status of the heavy load equipment in the factory. Get real-time volume of all information and parameters.
[0073] ST2012. Accumulate the inverter active power NBQP of all inverters with normal communication in the power station to obtain the total inverter active p...
Embodiment 3
[0093] image 3 It is a structural block diagram of Embodiment 3 of the present invention. Such as image 3 As shown, the reverse power control module of self-generated and self-consumed distributed photovoltaic power station includes:
[0094] Inverse power judging module. Used to judge whether there is reverse power. Retrieve the relationship between the active power P of the total incoming line switch of the factory and the maximum threshold TripP of the factory reverse power. Retrieve the relationship between the active power P of the main incoming line switch of the factory and the maximum threshold TripP of the factory reverse power: when P>TripP, a reverse power situation occurs, an alarm signal is generated, and a shutdown command is issued to all inverters with normal communication and startup, and Set the shutdown inverter power setting value NBQPset to the minimum. The minimum inverter power setting value NBQPset is the inverter minimum power setting value NBQM...
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