阅读说明：本技术 一种光伏发电的控制方法、控制设备及光伏发电系统 (Photovoltaic power generation control method and control equipment and photovoltaic power generation system ) 是由 顾桂磊 于 2018-05-28 设计创作，主要内容包括：本发明实施例提供一种光伏发电的控制方法、控制设备及光伏发电系统,涉及光电技术领域,当发生遮挡或是组件故障时,可以使得光伏发电系统中的优化器快速调整输出电压参考值,进而不会对系统的发电量造成影响。该方法应用于光伏发电系统,该系统包括至少一个光伏组串以及控制设备,光伏组串包括至少一个光伏模块,每一个光伏模块包括光伏单元和与光伏单元连接的优化器,每个光伏单元包括至少一个光伏组件,该方法包括：控制设备周期性向每一个光伏组串的优化器发送输出电压参考值更新指令；每一个光伏组串的优化器接收输出电压参考值更新指令,根据输出电压参考值更新指令更新输出电压参考值。(The embodiment of the invention provides a control method and control equipment for photovoltaic power generation and a photovoltaic power generation system, relates to the technical field of photoelectricity, and aims to enable an optimizer in the photovoltaic power generation system to quickly adjust an output voltage reference value when shielding or component failure occurs so as not to influence the power generation capacity of the system. The method is applied to a photovoltaic power generation system, the system comprises at least one photovoltaic string and a control device, the photovoltaic string comprises at least one photovoltaic module, each photovoltaic module comprises a photovoltaic unit and an optimizer connected with the photovoltaic unit, each photovoltaic unit comprises at least one photovoltaic assembly, and the method comprises the following steps: the control equipment periodically sends an output voltage reference value updating instruction to the optimizer of each photovoltaic group string; and the optimizer of each photovoltaic group string receives the output voltage reference value updating instruction and updates the output voltage reference value according to the output voltage reference value updating instruction.)

A control method of photovoltaic power generation is applied to a photovoltaic power generation system, the photovoltaic power generation system comprises at least one photovoltaic group string and a control device, the photovoltaic group string comprises at least one photovoltaic module, each photovoltaic module comprises a photovoltaic unit and an optimizer connected with the photovoltaic unit, the photovoltaic unit comprises at least one photovoltaic component, and the control method is characterized by comprising the following steps:

the control device periodically sends an output voltage reference value updating instruction to the optimizer, and the output voltage reference value updating instruction is used for indicating the optimizer to update an output voltage reference value;

and the optimizer receives the output voltage reference value updating instruction and updates the output voltage reference value according to the output voltage reference value updating instruction.

The method according to claim 1, wherein the optimizer is a direct current DC/DC converter, and the topology of the optimizer can be any one of Buck, Boost, Buck-Boost, and Boost-Buck.

The method according to claim 1 or 2, wherein the communication means between the control device and the optimizer is a wired communication means or a wireless communication means.

The method according to any one of claims 1 to 3, wherein the output voltage reference value updating command is a state quantity identifier, and the state quantity identifier is used for instructing the optimizer to update the output voltage reference value according to a preset adjustment coefficient;

or the output voltage reference value updating instruction carries the adjusting coefficient determined by the control device, so that the optimizer updates the output voltage reference value according to the adjusting coefficient determined by the control device before sending the output voltage reference value after receiving the output voltage reference value updating instruction.

A control method of photovoltaic power generation is applied to a photovoltaic power generation system, the photovoltaic power generation system comprises at least one photovoltaic group string and a control device, the photovoltaic group string comprises at least one photovoltaic module, each photovoltaic module comprises a photovoltaic unit and an optimizer connected with the photovoltaic unit, the photovoltaic unit comprises at least one photovoltaic component, and the control method is characterized by comprising the following steps:

the control device periodically sends an output voltage reference value updating instruction to the optimizer, and the output voltage reference value updating instruction is used for instructing the optimizer to update the output voltage reference value.

The method of claim 5, wherein the output voltage reference value update command is a state quantity flag, and the state quantity flag is used for instructing the optimizer to update the output voltage reference value according to a preset adjustment coefficient.

The method of claim 5, wherein before the control device periodically sends an output voltage reference update instruction to the optimizer, the method further comprises:

the control device determines an adjusting coefficient corresponding to the optimizer, and the adjusting coefficient is used for instructing the optimizer to update the output voltage reference value according to the adjusting coefficient.

The method of claim 7, wherein the output voltage reference update instruction carries the adjustment factor.

A control apparatus, characterized by comprising:

the device comprises a sending unit, a judging unit and a control unit, wherein the sending unit is used for periodically sending an output voltage reference value updating instruction to an optimizer, and the output voltage reference value updating instruction is used for indicating the optimizer to update an output voltage reference value;

the optimizer is deployed in a photovoltaic power generation system, the photovoltaic power generation system comprises at least one photovoltaic string and a control device, the photovoltaic string comprises at least one photovoltaic module, each photovoltaic module comprises a photovoltaic unit and the optimizer connected with the photovoltaic unit, and the photovoltaic unit comprises at least one photovoltaic assembly.

The control apparatus according to claim 9, wherein the output voltage reference value update instruction is a state quantity flag for instructing the optimizer to update the output voltage reference value according to a preset adjustment coefficient.

The control apparatus according to claim 9, characterized by further comprising a determination unit,

the determining unit is configured to determine an adjustment coefficient corresponding to the optimizer before the sending unit periodically sends an output voltage reference value update instruction to the optimizer, where the adjustment coefficient is used to instruct the optimizer to update the output voltage reference value according to the adjustment coefficient.

The control apparatus of claim 11, wherein the output voltage reference value update instruction carries the adjustment factor.

A photovoltaic power generation system comprising at least one string of photovoltaic modules, each photovoltaic module comprising a photovoltaic unit and an optimizer connected to the photovoltaic unit, the photovoltaic unit comprising at least one photovoltaic module, and a control device,

the control device is used for periodically sending an output voltage reference value updating instruction to the optimizer of each photovoltaic group string, wherein the output voltage reference value updating instruction is used for instructing the optimizer of each photovoltaic group string to update the output voltage reference value;

the optimizer is used for receiving the output voltage reference value updating instruction and updating the output voltage reference value according to the output voltage reference value updating instruction.