Photovoltaic generating control system and control method for comprehensive tunnel

Abstract

The invention discloses a photovoltaic generating control system and control method for a comprehensive tunnel. The photovoltaic generating control system comprises at least one photovoltaic board, the photovoltaic board is connected with a bus through a maximum power track and control circuit, the bus is provided with a plurality of battery which are connected in parallel, and the bus is connected with a load through an inverter. The photovoltaic board is connected with a voltage detection circuit and a current detection circuit, and the voltage detection circuit and the current detection circuit are respectively connected with a controller. The maximum power track and control circuit comprises a protection circuit, a filtering circuit and a Boost converter which are connected in order, the protection circuit is connected with the photovoltaic board, and the Boost converter is connected with the bus. The invention further provides a high-efficient maximum power track and control method. The method is quick in search speed, and high in stability precision. A large step length is automatically adopted when the maximum power point is far away, the search speed can be accelerated, and a small step length is adopted when the maximum power point is close, so the power loss can be reduced.

Description

Technical field [0001] The invention relates to a photovoltaic power generation control system and a control method for a comprehensive pipe gallery. Background technique [0002] Comprehensive pipe gallery refers to the scientific and reasonable accommodation of a variety of pipelines such as electricity, weak electricity, water supply, heat, etc. in an underground pipe gallery. Comprehensive pipe corridors are gaining more and more attention due to their high-efficiency utilization of underground space, avoidance of repeated excavation of roads, and ease of later maintenance. [0003] Photovoltaic power generation is a clean, efficient and sustainable new energy source. The use of photovoltaic power generation to supply power to the underground integrated pipeline gallery will have the following positive effects: [0004] 1. Electrical equipment such as lighting, power, and water pumps are installed in the pipe gallery. At present, the power supply of the integrated pipe gallery...

AI Technical Summary

Problems solved by technology

If the search step is set larger, it is prone to oscillation at the maximum power point, resulting in photovoltaic power loss; if the search step is set smaller, the mountain climbing search speed is slower and the capture power is smaller

[0009] 2. When multiple batteries are used in series, due to the inconsistent internal resistance of each battery, it is easy to cause some batteries to discharge more and some batteries to discharge less

The overall utilization efficiency of the battery is low

In the prior art, the research on the coordinated discharge of multiple batteries has not been applied

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