Mall Solution
This project aims to install an advanced energy storage system in a central Texas shopping mall to alleviate grid pressure caused by high electricity consumption. Given Texas' frequent extreme weather and the mall's need for reliable power, the system will integrate photovoltaic (PV) systems with energy storage to enable self-generation and consumption, while ensuring emergency backup power through a connected diesel generator during grid failures.
Project Overview
Available Only Through Renon Power
Geographical Location & Environmental Factors
Navigating Extreme Conditions in Central Texas
Location: Central Texas, facing the dual challenges of extreme summer heat and winter cold, with significant grid instability.
Environmental Factors: This region is one of the peak energy demand areas in the U.S., especially during hot summers when air conditioning loads surge, putting pressure on the grid.
Local Electricity Pricing
Renon Power’s Strategy for Texas' Fluctuating Electricity Prices
Texas electricity market is managed by ERCOT (Electric Reliability Council of Texas) and is a highly competitive wholesale market with significant price fluctuations. During peak demand periods, electricity prices can spike, increasing the mall s operating costs. Therefore, using an energy storage system to perform peak shaving and valley filling, charging during low-price periods and using stored energy during peaks, can effectively reduce electricity expenses and lower operating costs.
Photovoltaic System Application Direction
Tailored Photovoltaic Strategy for Maximum Efficiency
Photovoltaic System: Install rooftop PV panels with a 500kW generation capacity to harness solar power for self-consumption, meeting most of the mall s daily electricity needs, with excess energy stored in the energy storage system.
Energy Storage System Strategy Requirements
Strategic Requirements for Reliable Power Management
Energy Storage System: Configure a battery system with 1MWh power and 1.9MWh storage capacity to store excess energy and provide power during nighttime or cloudy days.
Comprehensive Strategy
Maximizing Efficiency and Resilience
Smart Scheduling: Implement an intelligent energy management system that optimizes the coordination between PV and energy storage systems based on real-time electricity prices and weather forecasts, maximizing economic benefits.
Safety Considerations: The system design must strictly adhere to local fire and safety standards to ensure the safety of people and property under all circumstances.
Maintenance and Monitoring: Establish a remote monitoring platform to regularly check system performance, promptly identify and resolve potential issues, and ensure long-term stable operation.
Overall Objective
Achieving Sustainable Power: Enhancing Efficiency and Reliability
By reducing electricity purchases from the grid and leveraging government subsidies, this system can recoup its investment costs within a relatively short period and significantly decrease household electricity expenses over the long term.
Core Component Selection
Renon Power Specialization
Battery System Selection
Selection: 1.9MWh battery capacity.
Rationale: The 1.9MWh capacity was chosen based on the store s daily electricity use and backup needs, covering off-peak demand and ensuring operation during outages for several hours to half a day.
Benefits: This capacity supports mall operations during non-peak hours and provides reliable backup in emergencies.
Advantage: The 1.9MWh capacity ensures critical operations continue without interruption during blackouts, maintaining essential services even in extended outages.
Rationale: The 500kW PCS integrated cabinet was chosen for its grid-connected off-grid switching capability, allowing it to respond to EMS commands, achieve seamless grid switching, and provide rapid charge discharge response in self-consumption mode.
Benefits: This configuration supports efficient grid switching, rapid charge discharge response, and includes features like island protection and high low voltage ride-through, ensuring stable system operation.
Advantage: The 500kW PCS ensures reliable power support across various operating modes, enhancing system flexibility and resilience.
PV System Power Configuration
Selection: 500kW photovoltaic inverter, maximum configuration.
Rationale: The 500kW photovoltaic inverter was selected based on the mall s location s sunlight intensity and available rooftop area, with an expected daily generation of 2MWh under an 80% sunlight efficiency and 5 hours of sunlight per day.
Benefits: This configuration efficiently utilizes solar resources, reduces grid dependency, and charges the battery during the day for nighttime use.
Advantage: The 500kW photovoltaic power effectively harnesses solar energy, ensuring a reliable and sustainable power supply while minimizing grid reliance.
The system enables seamless integration with photovoltaic panels and diesel generators, supporting versatile energy switching for enhanced stability and reliability in power supply.
Thermal Management & Safety
A high-efficiency cooling system with optimized airflow maintains safe battery temperatures in extreme heat, while smoke detectors and heptafluoropropane fire suppression ensure comprehensive safety.
Smart Battery Management
The advanced Battery Management System (BMS) monitors voltage, current, and temperature to ensure optimal performance and longevity. Predictive algorithms provide early warnings of battery aging for proactive maintenance.
System Advantages
Optimized Configuration
The 500kW photovoltaic system paired with 1.9MWh storage is designed based on the store s actual energy needs and local sunlight conditions, avoiding unnecessary costs from overconfiguration.
Flexibility and Reliability
The 1MW PCS, photovoltaic inverter, and STS module provide versatile functions such as charging, discharging, and grid interaction. This setup mitigates the impact of diesel generator integration and improves power quality, ensuring high system reliability and rapid emergency response.
Cost-Effectiveness and Sustainability
The combination of photovoltaic and energy storage reduces operational costs and carbon footprint, aligning with green energy trends.
