Isolated Grid
Overview
It applies to enterprises with high energy consumption and a large proportion of electricity costs, such as steel metallurgy, electrolytic aluminum, industrial silicon, data centers, and papermaking. It also applies to enterprises located in remote areas that cannot rely on the public power grid for power supply. By using the enterprises' self-owned power plants to supply power to production loads, enterprises can achieve self-generation and self-consumption of electricity, realize the circular utilization of energy, and ensure the safe and stable operation of the power grid. It is also applicable to key production safety enterprises like those in the petrochemical industry, which have high requirements for the safety and continuity of production power supply. When the enterprise power grid is disconnected from the public power grid, the self-owned power plants can be used to drive important loads to continue operating, thus ensuring the safe production of the enterprises.
Features
One-stop Service
- Tailors design schemes to enterprise grid characteristics, identifies operational risks with mitigation strategies, delivers full-scope proprietary equipment (validated in public grid applications), and provides post-commissioning O&M technical services to ensure project objectives.
Complete Product System
- All secondary equipment in enterprise grids is self-developed, eliminating multi-vendor interoperability challenges and reducing installation/commissioning/O&M complexity.
Core Technical Functions
- Independently developed core technologies including power flow control, fast backup power switching, latent fault detection, generator-grid coordination control, safety and stability control, and grid-connected/off-grid operation mode switching.
Benefits
Safety & Stability Analysis and Fault Response Strategies
Provides comprehensive safety-stability assessment and contingency control strategies for enterprise power grids across all operational scenarios.
Renewable Integration & Grid Interaction Optimization
Implements advanced optimization algorithms based on tie-line power flow conditions between enterprise and public grids. Coordinates predictive dispatch and real-time regulation of renewable energy generation, diesel generators, energy storage, and loads to prevent reverse power flow from enterprise grids to public grids.
Adaptive Islanding & Load Transfer Control
Enables rapid instability detection and self-adaptive islanding/load transfer control following public grid failures, minimizing production load disruptions.
Off-Grid Frequency/Voltage Autonomous Regulation
Automatically adjusts energy storage, diesel generators, and PV systems (PV curtailment only during over-frequency events) to maintain generation-load balance through minimally invasive continuous regulation, ensuring stable off-grid operation.
Priority-Based Load Shedding Protocol
Develops tiered load control strategies according to equipment criticality and dynamic characteristics, implementing fast generation/load tripping to ensure power supply reliability for vital loads.
Full-Spectrum Grid Solutions
Delivers turnkey services and equipment including simulation analysis, generator-grid coordination systems, stability control systems, and load management platforms.
Typical Cases
2×15MW Isolated Power Grid Project for the Production Line in Indonesia
This project is the largest single line cement production line in Indonesia and a landmark project for the alignment of the Belt and Road Initiative and the "Global Maritime Fulcrum" strategy. SIFANG provided a "one-stop" isolated power grid solution for this project. This solution can help enterprises solve the problem that the high failure rate of the local power grid seriously affects the safe electricity consumption of enterprises. When the external power grid fails, it enables enterprises to rely on their own power plants to ensure the safe and independent operation of the enterprise power grid, thus improving the overall reliability of enterprise electricity consumption.
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