Working mode and control logic of base station hybrid energy system

1. Off-grid PV System

Operation priority: photovoltaic power generation → photovoltaic storage synergy → pure battery power supply

Adaptive MPPT algorithm is used to achieve maximum power point tracking, and photovoltaic direct supply is prioritized when irradiance ≥ 200W/m²

Dynamic current distribution strategy is implemented in the photovoltaic storage synergy stage, and the charging/discharging curve is adjusted according to the SOC state

The battery management system (BMS) integrates a three-level protection mechanism: SOC<25% current limiting power supply, <15% execution safety shutdown

Advantages: zero emission operation, suitable for scenarios without mains access

2. Hybrid PV-DG System)

Energy dispatch logic: PV → PV + energy storage → diesel generator

Set dual threshold trigger mechanism: start pre-alarm when SOC≤25%, activate diesel generator set when ≤20%

Rectifier module is equipped with automatic voltage compensation (AVC) function to ensure that the output voltage is stable at ±2% when the diesel engine is powered

Configure intelligent start-stop controller to meet the requirements of 30 seconds cold start/10 seconds hot start

Advantages: power supply reliability ≥99.5%, suitable for periodic power outage areas

3. Multi-source complementary power supply system (Grid-PV-DG Hybrid System)

Power supply priority: PV> mains> energy storage> diesel generator

Introduce dual power automatic switching device (ATS), mains interruption response time ≤50ms

Intelligent energy router realizes dynamic balance of three-source power and supports real-time power compensation of ±5%

Configure N+1 redundant rectifier module, automatically switch to backup unit when single module fails

Advantages: comprehensive energy efficiency ≥92%, with seamless switching capability

All systems are equipped with SCADA monitoring platform, supporting remote parameter configuration and fault diagnosis. The three modes can be flexibly configured according to the base station load characteristics (average daily power consumption 10-50kWh), supporting smooth transition and upgrade.