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Pumped Storage Power Station Monitoring System Solution
Release date:
2025-08-19
As a leading enterprise in China's industrial control sector, Aotuo Technology has completed 200 hydropower station monitoring projects, 300 auxiliary equipment control projects, 10 large-scale hydropower plant governor controller projects, and 500 unit monitoring systems in the hydropower industry.
Leveraging its extensive technical expertise from numerous projects in the conventional hydropower sector, the company has actively responded to the nation's dual-carbon strategy in recent years, taking the lead in achieving localized technological breakthroughs for comprehensive lifecycle solutions of pumped-storage hydropower stations.
Aoto Technology has successfully implemented a system that includes Huizhou Pumped Storage Power Station, Guangzhou Pumped Storage Power Station Plant B Several national-level pumped-storage demonstration projects, including those mentioned above, among which the independently developed The NJ-series PLC, with its innovative breakthroughs such as millisecond-level precise control and seamless multi-condition switching, has now developed intelligent control system solutions that cover key processes including unit start-stop control, condition transitions, and frequency/fase modulation. 。
A pumped-storage hydroelectric power station is a special type of hydropower plant that uses excess electricity generated during periods of low demand to pump water from a lower reservoir to an upper reservoir for storage. During peak electricity demand, the stored water is released to generate power, thereby helping to regulate grid load and enhancing both the stability and economic efficiency of the power system.
The process flow of a pumped-storage hydropower station is a complex and sophisticated system that utilizes advanced technologies to store and release electrical energy, effectively balancing grid load while enhancing the stability and economic efficiency of the power system.
Compared to the single-operation mode of conventional hydropower stations, pumped storage power plants involve the coordinated control of two generating units working back-to-back—where one unit acts as the driving machine and the other as the driven machine—significantly increasing the technical challenges. Compared to conventional power stations, pumped storage plants primarily face the following difficulties:
Specific challenges >>>
A complex multi-device collaborative control process
Performing back-to-back mutual dragging requires precise coordination of the mechanical, electrical, and control systems of both units, including real-time matching of parameters such as guide vane opening, excitation current, and speed synchronization. Aotuo PLC's rapid closed-loop control and its portable, seamless data interconnection across multiple systems effectively meet the power station's need for fast equipment control and coordinated multi-system management.
High-Performance Equipment Requirements
Aoto's domestically developed speed governor system achieves frequency sampling accuracy as high as 0.0001 Hz, surpassing the 0.001 Hz precision of imported equipment. This advancement enhances the turbine's ability to precisely regulate frequency and voltage, meeting the stringent grid stability requirements of pumped storage power plants after they are connected to the grid.
C equipment requires high redundancy and reliability.
Back-to-back mutual redundancy places stringent demands on equipment design. It requires the adoption of dual-CPU hot standby, dual-power redundancy, and dual-network-port communication designs to ensure that a single point of failure does not disrupt overall operation. For instance, after Hui-Xu Pumped Storage Power Station implemented a dual-unit hot standby solution, the system availability was boosted to 99.99%.
D: High Security Risks and Complex Fault Handling
The moment of startup may cause a sudden drop in grid voltage or a surge in current. A comparative analysis of the Yixing Pumped Storage Power Station reveals that the back-to-back startup method results in a current peak 30% higher than that achieved with SFC (static frequency converter) startup, necessitating the installation of rapid protection devices.
The challenges of the back-to-back mutual drag process are primarily concentrated in areas such as multi-system coordination, synchronous control, equipment redundancy, and safety protection—tasks whose technical complexity far surpasses the single-power-generation control typically found in conventional hydropower plants.
Thanks to breakthroughs in domestically developed technologies—such as the high-precision control offered by Aotuo Technology's PLC—and the mature, reliable control programs provided by system integrators, the process has seen significant improvements in both reliability and cost-effectiveness. However, the core challenges still lie in integrating cross-disciplinary technologies and accumulating long-term operational expertise.
In the future, integrating digital twins with AI-driven predictive maintenance technologies is expected to further optimize startup success rates and extend equipment lifespan.
Introduction to the Control System Solution >>
As a leading domestic manufacturer of independently controllable PLCs (Programmable Logic Controllers), Aotuo Technology’s products have demonstrated significant technological advantages and practical value in the monitoring systems of pumped storage hydropower stations—particularly excelling in areas such as core hardware localization, information security, system stability, and localized customer support services.
Specific advantages
Domestic Chips and Operating Systems >>>
Aoto Technology's PLC uses a domestically produced Loongson processor and a domestically developed operating system. , achieving comprehensive domestic production—from chips and operating systems to application software—and breaking the long-standing monopoly of foreign manufacturers in the core controller sector.
Independent R&D of both software and hardware >>>
By independently developing an embedded real-time operating system and configuration software, AOT's PLC supports cross-platform operation, seamlessly integrates with domestically produced servers and databases, and is compatible with multiple international standard communication protocols (such as MODBUS TCP), enabling smooth connectivity with equipment from various brands.
Data Encryption and Network Isolation >>>
Addressing the high safety requirements of pumped storage power stations, ATOPLC has launched its intrinsically safe PLC product. This product leverages trusted computing and domestically developed cryptographic algorithms to encrypt Ethernet transmission messages, while employing software-configured filtering mechanisms to prevent unauthorized access. It also enables deep isolation of secure zones along with real-time monitoring capabilities.
Redundant architecture ensures continuous operation >>>
At the pumped storage power station, ATO PLC employs a dual-CPU hot-standby redundancy solution, supporting redundant configurations for CPUs, power supplies, and networks. For instance, the Huizhou Pumped Storage Power Station project utilizes dual-machine hot standby and Ethernet redundancy to ensure stable system operation even under extreme environmental conditions, thereby reducing the risk of downtime.
Rapid Response and High-Precision Control >>>
Addressing the speed-control requirements of pumped storage units, Aote has developed a domestically produced governor system with frequency-sampling accuracy reaching 0.0001 Hz—exceeding the 0.001-Hz precision of imported equipment. This advancement enhances the unit's ability to precisely regulate frequency and voltage, meeting the stringent grid stability demands following the integration of pumped storage power plants into the national grid.
Solution
Product Performance and Specifications
System Solutions
A Single-ring network control system solution:
B Dual-Ring Network Control System Solution
Against the backdrop of the deep integration between the energy revolution and the digital revolution, Aoto Technology will, as always, remain driven by innovation, delivering smarter and more reliable automation control solutions to the pumped storage industry, thereby contributing to the development of a clean, low-carbon, safe, and efficient energy system.
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Service hotline:+8618905163737
Company Headquarters: No. 15, Building B, Zone B, Phase I, Headquarters Economic Park, 69 Fengzhan Road, Yuhuatai District, Nanjing, Jiangsu, P.R. China
Production Center: No. 219 Qinghuiting West Road, Jiangning Economic Development Zone, Nanjing City, Jiangsu Province
Aoto Technology Co., Ltd.
