Control method of photovoltaic power station inverter under power rationing condition

A photovoltaic inverter, photovoltaic power station technology, applied in photovoltaic power generation, single grid parallel feeding arrangement, etc., can solve the problems of manual intervention, multiple start and stop of photovoltaic inverter, etc., to improve service life and reduce workload , the effect of improving timeliness

Active Publication Date: 2015-09-30
NARI NANJING CONTROL SYST
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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a control method for photovoltaic power station inverters under power-limited conditions. Using the photovoltaic power station monitoring system, the principles of remote control, remote control and as little co

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  • Control method of photovoltaic power station inverter under power rationing condition
  • Control method of photovoltaic power station inverter under power rationing condition

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0047] Such as figure 1 As shown, the photovoltaic power station monitoring system receives the planned total output power of the photovoltaic power station (planned output total power generation) of the power dispatching department, and the power control processing module in the photovoltaic power station monitoring In addition to the regulating function, it also has the function of starting and stopping and power regulation of the photovoltaic inverter under the condition of limited power. The power control processing module can directly issue remote control and remote adjustment instructions to the photovoltaic inverter.

[0048] A method for controlling an inverter of a photovoltaic power ...

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Abstract

A control method of a photovoltaic power station inverter under the power rationing condition includes steps of 1) acquiring the actual total output power and the lowest total output power of this moment and rated output power, accumulative start-stop times and current theoretical output power parameters of various photovoltaic inverters when a power control processing module receives dispatched planned total output power or self-checks at fixed time; 2) starting and stopping the photovoltaic inverters automatically according to strategies and adjusting active power; 3) comparing current real-time total output power with the dispatched planned total output power of the photovoltaic power station, turning to step 5) if difference falls in the allowable error, or turning to step 1), and turning to step 4) if repeated times exceed the preset time; 4) notifying operation and maintenance staff of failure in automatic adjustment within the preset times in a warning manner, and turning to step 5); 5) storing control processes and results in historical records by the power control processing module.

Description

technical field [0001] The invention belongs to the technical field of green energy power generation, and in particular relates to a control method for an inverter of a photovoltaic power station under power-limited working conditions. Background technique [0002] In recent years, domestic photovoltaic and other new energy power stations have developed particularly rapidly, but due to problems such as on-site consumption and delivery difficulties, a large amount of power generation has been wasted and cost consumed. Therefore, the power dispatching department of the power grid company often requires some photovoltaic power stations to operate with limited power . [0003] At the same time, photovoltaic inverters have operating parameters to operate with a minimum output power. When the limited output power is low, measures must be taken to reduce the active power and shut down the inverter; when the limited output power is increased, the active power must be increased or t...

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Application Information

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IPC IPC(8): H02J3/46
CPCY02E10/56
Inventor 汤海宁
Owner NARI NANJING CONTROL SYST
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