Specifications
Weighing: HollySys recently completed the commissioning of the distributed control system (DCS) upgrade and retrofit project for Datang Jilin Power Co., Ltd. Liaoyuan Power Plant, marking a significant step in enhancing intelligent control and operations in the power sector.Located in Liaoyuan City, Jilin Province, China, the power plant operates two 330 MW subcritical cogeneration units, providing heating for approximately 16.08 million square meters, 89% of the city's centralized heating area. However, the upgrade & retrofit project faced complex challenges including tight timelines, overlapping construction across multiple units and the integration of systems supplied by various vendors. The Unit 3 had to be fully upgraded within 54 days, while Unit 4, along with the common and auxiliary control network, needed to be upgraded within just 18 days. The original DCS and PLCs were built by various third-party vendors, each with different technical architectures and communication protocols, making unified system integration and communication upgrades particularly demanding.
In response, HollySys formed dedicated implementation teams for main units and auxiliary control network, delivering a customized HOLLiAS integrated solution. The solution covered legacy system upgrades, third-party system transformation, network reintegration, and communication protocol adaptation. From system planning and design to testing, delivery, and commissioning, HollySys ensured precise coordination and high-quality execution. As a result, the upgrade of 102 control stations and 142 control cabinets for Units 3 and 4, as well as for the plant’s common and auxiliary control networks, was completed within schedule. Both units achieved one-time grid connection and power generation, realizing fully autonomous and integrated DCS operation across the entire plant. The client commended the project for its efficiency, technical excellence, and on-time delivery.
HollySys has developed multiple generations of control systems, continually advancing technological innovation. With over 30 years of industry experience, we offer users simpler, more integrated, and more economic solutions of industrial intelligence. HOLLiAS® MACS DCS is a future-proof industrial automation control system designed to support flexible plant architectures. Its exceptional performance has earned the trust of users, with over 20,000 successful installations spanning more than 60 countries worldwide.
HOLLiAS® MACS DCS is built with a clear purpose: simple configuration to handle your unique control applications - no matter their sizes - and ease of expansion to cover additional personnel and assets, or even integrate entire business operations. HollySys enhances enterprise adaptability and competitiveness by utilizing advanced DCS capabilities. Full lifecycle services cover every stage from design through operation to maintenance, providing users with extensive technical support and assurance, reducing operational costs, and enhancing system availability and maintainability.
Product Features
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High Stability
High system reliability with full redundancy configuration, minimizing unplanned downtime
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High Flexibility
Suitable for various types of projects, enhancing application flexibility
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Lower Cost
Unified platform with customized industry-specific function blocks and libraries for lower cost and higher efficiency
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User-Friendly Operation
Unified project management tools and advanced, user-friendly HMI interfaces for lower mainte nance cost
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High Precision
Highly accurate data collection, control, and analysis
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Superior Quality
Design and manufacturing compliant with international standards
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Shorter Lead Time
Seamless data integration from process design to plant engineering
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Enhanced Network Security
Equipped with built-in security components and external secure communication devices to ensure system integrity
Inquiry - HOLLiAS® MACS-K DCS



