1. Core constituent units
**Distributed generation * *: Photovoltaic array (designed with a capacity of 120-150% of peak load), optional wind/diesel generator hybrid configuration
**Energy storage system * *: Lithium ion battery pack (capacity designed based on daily average electricity consumption of 30-50%), supercapacitor (used for instantaneous power compensation)
**Intelligent control system * *: Central Energy Management System (EMS), multi-mode operation controller
2. Typical operating mode
Grid connected operation: Switching conditions - normal power grid, control strategy - participation in demand response/peak valley arbitrage
Island operation: Switching conditions - Grid failure, Control strategy - Black start/Fast frequency and voltage adjustment
Hybrid operation: Switching conditions - unstable power grid, control strategy - seamless switching/power quality optimization

1. Technical requirements for battery pack
**High cycle stability * *: ≥ 8000 cycles @ 90% DoD (industrial grade LiFePO4)
**Rapid response capability * *: millisecond level power response (0-100% power<500ms), continuous 2C discharge capability
**Intelligent Balance Management * *: Active Balance Current ≥ 5A, Individual Voltage Deviation ≤± 10mV
2. System level security design
**Multi level protection system * *: electrical protection (overvoltage/undervoltage/overcurrent), thermal management (liquid cooling system ± 1 ℃ temperature control), fire protection (perfluorohexane automatic fire extinguishing)
**Electromagnetic compatibility * *: Passed IEC61000-6 series testing, with an anti electromagnetic interference level of ≥ 4

1. Microgrid in industrial parks
**Configuration plan * *: Photovoltaic: 1.5MWp roof+ground system, energy storage: 2MWh lithium battery+500kW supercapacitor, load: precision manufacturing equipment (power quality requirement THD<3%)
**Operational benefits: 35-45% reduction in electricity costs, 99.999% reliability of backup power supply
2. Island independent microgrid
**Special design * *: Salt spray corrosion resistant shell (IP66 protection), multi energy coordinated control (photovoltaic+wind power+diesel engine), priority power supply for fresh water preparation load
**Case data * *: Diesel consumption reduced by 82%, renewable energy penetration rate ≥ 75%

1. Core algorithm
**Multi objective optimization scheduling * *: economic optimization (minimizing electricity costs), equipment life optimization (battery decay control), carbon emission optimization (prioritizing clean energy)
**Predictive control * *: Photovoltaic power generation power prediction (accuracy ≥ 90%), load prediction (based on AI algorithm)
2. Communication architecture
**Hierarchical control system * *: Device layer: CAN bus+Modbus, Control layer: Industrial Ethernet, Cloud platform: 4G/fiber dual channel
**Network Security * *: IEC62351 Standard Encryption, Firewall+Intrusion Detection

1. Requirements for Energy Storage Converter (PCS)
**Voltage range * *: 300-900VDC wide voltage input
**Conversion efficiency * *: ≥ 97% (European efficiency)
**Functional requirements: seamless switching function (<10ms), virtual synchronous machine (VSG) function, harmonic compensation capability (THD<1.5%)
2. Energy Management System (EMS)
**Core functions * *: Real time energy scheduling, fault diagnosis and self-healing, electricity market interface
**Interface requirements * *: 3D visualization display, mobile monitoring APP