Dynamic Power Curtailment via Message Bus for Grid-Tied PV Systems
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Solution Overview
Problem
Grid-tied solar photovoltaic systems often face challenges in managing overgeneration of power, which can pose technological and safety issues, as they produce more energy than required by the system load, leading to inefficiencies and potential safety hazards.
Innovation Solution
A method and system utilizing a message bus system to dynamically curtail power production by subscribing to real-time power generation data, determining overgeneration conditions, and generating control signals to instruct energy generation assets, such as photovoltaic inverters, to decrease power output based on system load requirements, thereby maintaining a balanced energy distribution within the grid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solar photovoltaic systems are grid-tied to increase energy generation, then power production capability is improved, but overgeneration problems occur when output exceeds system load requirements
Solution Approach 1:
The system continuously monitors real-time power generation data and system load conditions through a message bus, comparing generated power against load requirements. When overgeneration is detected, the system automatically sends curtailment commands back to the energy generation system to reduce output, creating a closed-loop feedback control mechanism that prevents harmful overgeneration while maintaining high productivity capability
Solution Approach 2:
The curtailment level is dynamically adjusted based on real-time conditions rather than being fixed. The system calculates the difference between power generation and system load, then applies variable curtailment commands through the message bus to match actual demand, allowing the system to transition smoothly between different operating states without waste or overgeneration
2Reliability
If real-time monitoring and control systems are implemented to manage overgeneration, then grid stability is improved, but system complexity increases due to message bus integration
Solution Approach 1:
A message bus system serves as an intermediary communication layer between the energy generation system, load metering device, and control server. This standardized messaging infrastructure simplifies integration by providing a universal communication protocol, reducing the complexity that would otherwise arise from direct point-to-point connections between multiple system components
3Object-affected harmful factors
If dynamic curtailment control signals are generated to reduce power output, then overgeneration is prevented, but energy production efficiency decreases during curtailment periods
Solution Approach 1:
The system applies curtailment only to the extent necessary to prevent overgeneration, rather than shutting down completely. By calculating the difference between power generation and system load, the system applies partial curtailment that matches actual demand, minimizing energy loss while still preventing the harmful effects of overgeneration
Data Source
AI summary
Techniques for curtailing a power generation system utilizing a message bus may be provided. Power generation data of a message bus system associated with an energy generation system may be subscribed to over a network. The message bus system may be configured to manage messages between the energy generation system, a system load metering device, and/or a server computer. The power generation data of the energy generation system may be received from the message bus system. In some examples, a control signal may be generated to curtail an overgeneration condition of the energy generation system based at least in part on the received power generation data when the overgeneration condition is occurring. The control signal may be published to the message bus system for communication to the energy generation system.