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Practicing the "dual carbon" goal and embodying the principle that "green mountains and clear waters are invaluable assets," we aim to establish a green and high-tech image for the scenic area.

As the core technology provider for this project, we provided the scenic area's service area with a one-stop solution, from top-level design support and core control system to full-site system commissioning. The core architecture of the project is as follows:

The project consists of one EMS (HEMS200) controlling three 125kW/261kWh energy storage systems, several photovoltaic inverters, five 120kW dual-gun charging piles, and mains power anti-reverse current meters, among other equipment. The hybrid energy management system FPS200, after commissioning, meets the functional requirements of the project, providing control logic for green electricity consumption, peak shaving and valley filling, reverse current prevention, and overload prevention.

Project Overview

Project Name: Energy Storage System Project for a Scenic Area in Ganzi Prefecture, Sichuan Province

Project Address: Ganzi Prefecture, Sichuan Province

Application Scenario: Energy Storage in Scenic Areas

System Configuration: 125kW/261kWh Air-Cooled Energy Storage System

Core Functions: Peak shaving and valley filling, backflow prevention, overload prevention, flexible capacity expansion

Commissioning Time: May 2025

**Project Background and Requirements Analysis**

Hotel Electricity Usage Characteristics: As a 5S scenic area, this hotel's electricity load exhibits the following peak and valley characteristics:

**Distinct Characteristics:** Peak electricity usage is concentrated between 08:00-12:00 and 18:00-22:00. **Stable Basic Load:** Basic electricity needs such as air conditioning, lighting, and elevators require 24-hour service.

**Seasonal Fluctuations:** Air conditioning load increases significantly in summer, and heating demand rises in winter.

**High Power Quality Requirements:** Continuous power supply to key areas (meeting rooms, guest rooms) must be guaranteed.

**Pain Points Analysis:**

1. High Electricity Costs: Electricity consumption increases significantly in winter and summer, with peak-hour electricity costs accounting for over 60%.

2. Transformer Capacity Limitations: Existing transformers are nearing full capacity, and expansion costs are high.

3. Power Reliability Requirements: The hotel needs to cope with occasional grid fluctuations and temporary power outages.

4. Green and Low-Carbon Requirements: The hotel must comply with national dual-carbon policies and enhance its green image.

Core Control Strategy

1. Peak Shaving and Valley Filling Strategy:

Peak period charging (00:00-08:00): Utilizing off-peak electricity prices (0.3 yuan/kWh) to charge the energy storage system. Optimization during normal periods (08:00-12:00, 22:00-24:00): Intelligent charging and discharging based on real-time electricity prices and load conditions. Peak period discharging (12:00-18:00, 18:00-22:00): Prioritizing energy storage power supply to avoid high-priced electricity during peak hours (1.5 yuan/kWh).

2. Anti-backflow control logic monitors the power flow direction at the grid connection point in real time. When it detects potential backflow of power to the grid, it automatically adjusts the PCS output power.

3. Transformer capacity optimization: During peak load periods, the energy storage system supplements power supply, reducing the transformer load rate and preventing transformer overload operation, thus reducing demand.