Control method and control device of photovoltaic- diesel oil compound power supply system

Abstract

The invention relates to a control method and a control device of a photovoltaic- diesel oil compound power supply system, computer equipment, and a storage medium. The control method comprises steps that a changing value of solar radiation illuminance, a real-time maximum output power of a photovoltaic power generation system, and micro-power grid load are acquired, and according to the changing value of solar radiation illuminance, the real-time maximum output power of the photovoltaic power generation system, and the micro-power grid load, the photovoltaic power generation system is operated in a frequency adjusting mode, an active power adjusting mode, or a maximum power point tracking mode; in the active power adjusting mode, backup active power is reserved for the photovoltaic system according to the output power of the photovoltaic system and the stored maximum power point; according to the operation mode of the photovoltaic power generation system, a diesel generator is operated in a generator mode or a synchronous capacitor mode. By adopting the control method, the output power of the photovoltaic power generation system is adjusted freely according to the requirements of the micro-power grid under the condition of the maximum power, and therefore a certain power residual is kept to participate in a micro-power grid auxiliary adjusting function, and then the frequency stability and the voltage stability of the micro-power grid are improved, and costs are reduced.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a control method and device, computer equipment and storage media for a photovoltaic-diesel composite power supply system. Background technique [0002] Microgrid is a concept relative to the traditional large power grid. It refers to a network composed of multiple distributed power sources and their related loads according to a certain topology, and is connected to the conventional power grid through static switches. Due to the large fluctuations in the load of the microgrid, the selection of diesel generators generally matches the load of the microgrid during peak hours. Therefore, diesel generators are lightly loaded during off-peak hours, resulting in a reduction in their power generation efficiency. Parallel operation of the photovoltaic power generation system and diesel generators effectively utilizes the characteristics of peak-shaving and valley-filling of photovoltaic powe...

AI Technical Summary

Problems solved by technology

[0007] The above method can effectively solve the energy management problem of the micro-grid technically, but the additional system equipment will inevitably increase the system investment and system maintenance costs, thereby increasing the cost of power generation, and the power users of the micro-grid will pay more for this. electricity cost

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