{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9853571","patent":{"patent_number":"US-9853571","title":"Secondary control method and apparatus of parallel inverters in micro grid","assignee":null,"inventors":[],"filing_date":"2017-03-07T00:00:00.000Z","publication_date":"2017-12-26T00:00:00.000Z","cpc_codes":["H02J","H02J","H02M","H02M","H02J"],"num_claims":20,"abstract":"The present invention discloses a secondary control method and apparatus of parallel inverters in a micro grid, comprising: generating frequency and amplitude of fundamental voltage in the voltage instruction of inverter by droop control according to output voltage and output current of inverter to obtain a fundamental voltage instruction value; extracting voltage values and current values of a first and second AC signals from output voltage and output current of inverter, generating frequency instruction values of the first and second AC signals by droop control to obtain voltage instruction values of the first and second AC signals; regulating the output voltage of inverter according to the voltage instruction value of the first AC signal, the voltage instruction value of the second AC signal and the fundamental voltage instruction value."},"analysis":{"summary":"The Secondary Control Method and Apparatus of Parallel Inverters in Micro Grid patent introduces a novel approach to enhance the stability and efficiency of microgrids. The core innovation lies in the dynamic adjustment of frequency and amplitude of inverter output voltage through a sophisticated control mechanism. This system addresses the problem of voltage instability and poor power quality often encountered in microgrids with parallel inverters. The key technical approach involves extracting voltage and current values of both fundamental and harmonic AC signals from the inverter output and applying droop control to these signals to generate frequency instruction values. This results in a more precise regulation of the inverter output voltage, leading to improved power quality and system stability. The business value of this technology lies in its ability to enhance microgrid resilience, reduce equipment damage, and ensure a stable power supply. This is particularly important for remote communities and critical infrastructure that rely on microgrids. The market opportunity is significant, as microgrids are becoming increasingly prevalent as a means of integrating renewable energy sources and enhancing grid reliability. The Secondary Control Method and Apparatus of Parallel Inverters in Micro Grid offers a promising solution to the challenges of microgrid operation, paving the way for a more sustainable and resilient energy future.","layman_explanation":"1. What Problem Does This Solve? (100-150 words)\nThe Secondary Control Method and Apparatus of Parallel Inverters in Micro Grid addresses the challenge of maintaining stable and reliable power in microgrids. Microgrids, which are localized energy grids, often use multiple power sources like solar panels, wind turbines, and generators. These sources need to work together seamlessly, but sometimes they don't, leading to unstable voltage and unreliable power. Existing solutions often fall short because they can't adapt quickly enough to changing conditions or handle the complexities of multiple power sources working in parallel. This can result in flickering lights, equipment damage, and disruptions in power supply.\n\n2. How Does It Work? (200-300 words)\nThis patent provides a smart way to control the power from each source in the microgrid. Imagine each power source is like a musician in an orchestra. Without a conductor, they might play at different speeds and volumes, creating a chaotic sound. The Secondary Control Method and Apparatus of Parallel Inverters in Micro Grid acts like the conductor. It constantly monitors the power output from each source and adjusts them to work together harmoniously. It does this by looking at the voltage and current from each source and making small adjustments to keep everything balanced. It's like a finely tuned engine that keeps the microgrid running smoothly, even when the load changes or one of the power sources fluctuates. This system ensures that the power is always stable and reliable, preventing disruptions and damage.\n\n3. Why Does This Matter? (150-200 words)\nThis innovation matters because it makes microgrids more reliable and efficient. Microgrids are becoming increasingly important for providing power to remote communities, critical infrastructure, and businesses that want to reduce their carbon footprint. By ensuring a stable power supply, this technology helps these microgrids operate more effectively and reduces the risk of equipment damage and power outages. This can lead to significant cost savings and improved reliability. The market impact is substantial, as the demand for microgrids is growing rapidly. The competitive advantages include improved voltage stability, enhanced power quality, and a more resilient system. This technology offers significant business value by enabling the widespread adoption of microgrids and improving their performance.\n\n4. What's Next? (50-100 words)\nFuture applications of this technology include integration with smart grid systems and electric vehicle charging networks. The market adoption timeline is expected to be rapid, as microgrid developers and operators seek to improve the performance and reliability of their systems. Investment implications are positive, as this technology offers a compelling value proposition for investors seeking to capitalize on the growth of the microgrid industry.","technical_analysis":"The Secondary Control Method and Apparatus of Parallel Inverters in Micro Grid patent presents a technically sophisticated solution for enhancing microgrid stability. The system's architecture revolves around a closed-loop control mechanism that dynamically adjusts the frequency and amplitude of the inverter output voltage. The implementation involves a signal processing algorithm to extract the fundamental and harmonic components from the inverter output voltage and current. This algorithm must be robust to noise and variations in the signal characteristics. The droop control mechanism is implemented using a proportional-integral (PI) controller, which adjusts the frequency instruction values based on the error between the desired and actual voltage and current values. The output voltage regulation is achieved through a pulse-width modulation (PWM) technique, which controls the switching of the inverter transistors. The integration patterns involve seamless communication between the inverters and the central control unit. The performance characteristics of the system are evaluated based on voltage stability, power quality, and response time. Code-level implications include the need for efficient and optimized algorithms to ensure real-time performance. This technology requires careful consideration of signal processing techniques, control algorithms, and communication protocols to ensure robust and reliable operation.","business_analysis":"The Secondary Control Method and Apparatus of Parallel Inverters in Micro Grid patent has significant business implications for the microgrid industry. The market opportunity is substantial, as microgrids are becoming increasingly prevalent as a means of integrating renewable energy sources and enhancing grid reliability. The competitive advantages of this technology include improved voltage stability, enhanced power quality, and a more resilient system. The revenue potential lies in the licensing of the technology to microgrid developers and operators. The business models include direct sales, licensing agreements, and subscription services. The strategic positioning of this technology is as a key enabler for the widespread adoption of microgrids. The ROI projections are based on the reduction in equipment damage, the decrease in power supply disruptions, and the increase in overall system efficiency. This technology offers a compelling value proposition for investors and stakeholders in the microgrid industry. The successful commercialization of this technology will require a strong focus on marketing, sales, and customer support.","faqs":[{"question":"What is Secondary Control Method and Apparatus of Parallel Inverters in Micro Grid?"}],"topics":["microgrid control","parallel inverters","voltage stability","power quality","distributed generation","secondary","control","method"],"tech_cluster":null},"seo":{"title":"Secondary Control Method and Apparatus of Parallel Inverters in Micro Grid - Patent US-9853571","description":"Discover the Secondary Control Method and Apparatus of Parallel Inverters in Micro Grid for enhanced microgrid stability. Full patent analysis, claims, and applications.","keywords":["microgrid control","parallel inverters","voltage stability","power quality","distributed generation","patent","patent US-9853571"]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9853571","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9853571","citation_suggestion":"Patentable. \"Secondary control method and apparatus of parallel inverters in micro grid\" (US-9853571). https://patentable.app/patents/US-9853571","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9853571","json":"https://patentable.app/api/llm-context/US-9853571","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T03:40:21.461Z"}