Background

1.Jingshan City has large-scale contiguous development of mountain photovoltaics, with concentrated loads in county-level manufacturing parks. During the day, photovoltaics generate heavily, and the peak-to-valley difference of the power grid between day and night is increasing year by year. The dual pressures of local consumption of new energy and guaranteeing peak power supply are prominent;

2.Mountain photovoltaics are scattered, and the power grid structure is weak. Existing energy storage equipment only follows the grid operation and lacks independent voltage support capabilities. In the event of line faults or voltage sags, large-scale disconnection of photovoltaics is likely to occur, threatening regional power supply reliability;

3.There is a lack of customized digital management and control scenarios. Operational data of energy storage participating in grid voltage regulation and b3ackup services cannot be displayed centrally and intuitively, leaving dispatch and operation & maintenance without an efficient decision-making carrier.

Countermeasures

1.Land the Jingshan Shantong Grid-Forming Independent Large-Scale Energy Storage Power Station, equipped with a VSG (Virtual Synchronous Generator) grid-forming control system. It possesses capabilities for fault ride-through, black start, primary frequency regulation, and continuous reactive power regulation. It consumes surplus mountain photovoltaic power during the day and discharges during evening industrial peak loads to flatten peaks and valleys, strengthening the stability support of the weak grid framework;

2.Equip the entire station with an integrated intelligent metering terminal and a cloud-based remote meter reading module, connecting to the Jingmen City Energy Unified Supervision Platform. One-click export of reports related to peak-valley trading, ancillary services, and new energy consumption simplifies the entire process of meter reading and settlement;

3.Open up the data links among the Jingshan mountain photovoltaic clusters, industrial park distribution networks, jurisdictional substations, and the energy storage power station, realizing aggregated monitoring and collaborative optimized dispatching of wind, solar, storage, and load multi-systems on the same platform;

4.Build a station 3D digital visualization management and control platform to collect in real-time the operating parameters of the grid-forming PCS, the charge/discharge power of the whole station, grid voltage and frequency, and standby/voltage regulation output data, customizing the restoration of Jingshan mountain photovoltaic + industrial load characteristic operation scenarios.

Project Value

This project is the Jingshan Shantong Grid-Forming Independent Large-Scale Energy Storage Grid-Connected Project. Relying on the grid-forming energy storage intelligent management and control platform, it resolves the challenge of consuming mountain photovoltaic power in Jingshan, flattens the peak demand gap of industrial loads, reinforces the stability support capability of the county-level weak grid framework, and reduces investment in thermal power peak shaving and line expansion. It breaks down data silos among multi-energy systems and enhances the coordinated operation level of regional source-grid-load-storage.

The power station can participate in multiple grid ancillary services such as peak-valley electricity price arbitrage, frequency regulation, voltage regulation, and backup in Hubei Province, building a stable and diversified revenue system. The grid-forming operation mode ensures the reliable grid connection of scattered mountain photovoltaics, effectively increasing local new energy generation. The 3D visualization platform is adapted to Jingshan's "PV + Industrial Load" scenarios, providing visual data support for grid dispatching, daily station operation and maintenance, and annual revenue calculation.

The platform is equipped with a complete carbon monitoring and accounting system, accurately measuring the emission reduction volume of energy storage replacing thermal power. It provides credible data support for Jingshan City's dual carbon assessment, green industry declaration, and carbon asset development and trading, assisting in the construction of Jingshan as a comprehensive demonstration county for全域 (whole-domain) mountain photovoltaics.