Requirements for load management and availability
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Ensuring sustainable power
Whether a refinery, an offshore platform, a pipeline, a floating liquefied natural gas (LNG) plant, a state-of-the-art automotive production plant, a coal mine or steel production: some of the core processes used in industry are highly dependent on reliable and uninterruptable electric power supply systems.
A restricted availability of power can reduce plant production capabilities dramatically, which in turn can lead to financial setbacks and cause blackouts. As such, it’s not difficult to understand why industry firms should view a consistent supply of power as a priority. Through power management solutions, it is also possible to reduce operating costs, prevent loss of productivity due to outages, ensure personnel safety, avoid damage to equipment, maximize cyber security and ensure compliance with legal regulations.
Digitalization for industrial power gridsMany industry companies are going through a so-called “digital transformation”. In summary, myriads of sensors in modern energy systems collect vast amounts of data, leading to interaction on an entirely new scale. Artificial intelligence and big data analytics are revolutionizing power grid operators’ decision-making.
Siemens is a leader when it comes to mastering the challenges of industry power grid operators in the digital age. Some of the pressing questions for industrial firms are:
What does “digital transformation” mean for my business and my industry plants?
Do I have the business agility to adjust faster to new circumstances and adapt to new business models and services?
Can I manage investments optimally – ensuring scalability and adaptability to future business, technological and functional requirements?
Do I have measures in place that protect the data and minimize the risk of malicious cyberattacks?
Siemens has answers to these questions, and can guide industries on the path to digital transformation:
- Using our analytics and simulation software up to electrical digital twins of your overall power grid in the planning phase, helps saving time and optimizing investments.
- Our power grid operation and control center solutions allow you to achieve resilience, automation, control, transparency and awareness.
- Proven web applications increase efficiency and optimization.
- Siemens products and solutions give you a strong basis for high cyber security in a flexible system.
Digital applications for industry gridsFor industry grids a variety of grid applications is available to improve availability, reliability and efficiency
Reliable power for industry
To improve power supply reliability and availability, our power management solutions integrate intelligent control center technologies with substation automation systems and protection devices along with field area network data from sensors, and different kind of meters. Our energy automation solutions create numerous opportunities to increase the performance of industrial facilities while making their operations more efficient.
- Investment protection by meeting the future-proof IEC 61850 standard
- Open interfaces for integrating different applications and vendor systems
- Customized power management solution for enhanced control and monitoring
- Enabling increased situational awareness and more informed decisions
- Optimized power quality throughout the entire plant
- Integrated, holistic approach for higher system performance and sustainably lower costs
Efficient solutions for your needs
Our solution integrates protection, power monitoring and control, substation automation, and energy management. We automate your power supply, protect your plant against possible damage, and ensure that your electrical power and service are monitored and operating within acceptable limits. Effectively integrating these functions and complementary applications in one state of-the-art solution instead of individual legacy systems helps keep costs low while ensuring availability of all required features.
Integrated applicationsLoad shedding, generation control and microgrid control are all integrated within our energy automation system and run on one central controller, with optional redundancy available and using available IEDs. As a result, there is no need for additional devices or inputs/outputs. In addition, the same user interface is used for control and monitoring. This provides a very transparent means of displaying numerous parameters, for example, power flows and reserves, operating modes, individual generator sets, and entire grid areas. The process – i.e., condition and measured value acquisition as well as the output of commands and setpoint values – is interfaced via field and/or telecontrol devices.
Fail-safe power supply for core components
In case of overload or sudden power shortages, automatic load shedding stabilizes the power supply of large-scale industrial plants through the prioritized disconnection of consumers, thereby ensuring that core processes remain under power in critical situations and expensive downtimes are avoided. This function is especially important when grid stability is put at risk by critical events. In this case, low priority consumers are disconnected in order to keep the balance between energy generation and consumption.
Prepared for every eventuality
To ensure grid stability at all times, the automatic load shedding system analyzes all possible fault patterns in advance and calculates which loads will need to be disconnected. In the event of a fault, the system recognizes which of these scenarios pertains and disconnects the relevant consumers within a very short time.
Power-based load shedding continuously calculates the necessary reactions to critical scenarios that could occur and is therefore prepared for all eventualities at all times. This predictive approach is used for fast load shedding as well as for blocking of large loads.
Coordination of different generator sets
Generator sets typically have their own primary controllers. If several of them operate jointly in an island grid, they need to be coordinated. Generation control ensures the most reliable power generation possible in industry grids containing several generator sets – both connected to an external power utility and in island mode.
Ensuring grid stability
Generation control establishes evenly balanced active power that enables power demand from an external grid to be set, to keep within a maximum purchasing limit from the external grid, or to stabilize the frequency in the islanded grid. It can, however, also establish evenly balanced reactive power in order to maintain a desired power factor angle at the tie-line to an external grid or to stabilize the rated voltage of the busbars in island mode. Generation control also calculates the spinning reserve in order to ensure that there is always sufficient control capacity available.
Maximum security in operating microgrids
As part of Siemens’ power management solutions, our microgrid control application helps industry customers optimize the performance of their microgrid or island grid. In addition, the application can forecast demand and (renewable) generation and adjusts the main grid supply accordingly.
Microgrids are a reliable alternative when autonomous power supply is needed, such as on islands, or when optimizations are required for higher level grids or supply costs. With grid-connected operation, microgrids enable energy to be reliably provided from renewable sources, battery storage, at both high-peak and low-peak times. They can also influence reactive power and help save money by regulating the maximum power demand or infeed. Microgrids offer high reliability and improved energy quality. And they have a further advantage: Microgrids can operate independently of the higher-level grid.
Reliable monitoring and control are the biggest challenges to stable operation of a microgrid. Microgrid control meets these challenges.