How 15MW/60MWh Storage System Solves New Energy Integration Challenges

I. Project Background: Harnessing Solar Potential in the Gobi

As China’s first new energy demonstration city, Dunhuang boasts 3,258 annual sunshine hours and class – A solar resources. CEEC’s 100MW PV project in Kumtag Desert uses high – efficiency bifacial panels and smart trackers to generate 180 million kWh annually, equivalent to 120,000 tons CO₂ reduction. However, intermittency issues posed grid integration challenges.

SolutionProject OutcomesII. Solution: Building a “PV + Storage” Smart Ecosystem

CEEC deployed a 15MW/60MWh lithium – ion energy storage system, creating northwest China’s first integrated “PV + Storage” project (Insert Figure 1: Schematic of Dunhuang PV + Storage System). Key innovations include:

DAI – Driven Forecasting: Real – time PV output prediction optimizes storage charging/discharging;

Millisecond – Level Response: 20ms power compensation smooths PV fluctuations;

Multi – objective Optimization: Balances economic returns, grid stability, and auxiliary services.

III. Project Outcomes: From Technical Breakthrough to Social Impact

Peak Shaving for Economic Success

Daily 2 – cycle operations yield 12 million yuan annual revenue via Gansu’s 0.6 yuan/kWh TOU pricing;

Payback period shortened from 8 to 3.8 years, setting industry benchmarks.

Grid Stabilization for Renewable Integration

PV output volatility reduced from ±20% to ±5%, cutting Dunhuang’s curtailment rate by 3%;

Provides replicable model for Kumtag Desert’s 23GW new energy base.

Multi – service Value Creation

300 fewer thermal power cycles annually, reducing coal loss by 20%;

Modular design supports future hydrogen integration and virtual power plant expansion.

Green and Economic Win – Win

4.5 billion kWh generation over 25 years saves 1.5 million tons coal, cuts 3.8 million tons CO₂;

Generates 22 million yuan annual tax revenue and 530 jobs, transforming Dunhuang into a “green hub.”