Generator Load Timing Control via Priority Sequencing
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Solution Overview
Problem
Existing load shedding systems face challenges in handling high-priority switching loads and varying load conditions, often resulting in prolonged power source overload and inadequate protection for generators, especially when starting large motors.
Innovation Solution
A method that determines the timing of adding and shedding loads based on the available generator capacity and operating conditions, adjusting the time to add loads when capacity is high and shedding loads quickly when overloaded, to prevent power source overload and ensure efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing load shedding systems prioritize loads and determine capacity before adding each load, then the generator capacity is optimized, but the system responds slowly to overload conditions and may allow prolonged generator overload
Solution Approach 1:
The system pre-calculates and stores the priority ordering of all loads before operation begins. This preliminary arrangement allows the system to immediately shed loads in priority order when an overload is detected, without needing to perform complex real-time calculations during the overload event, thus reducing response time while maintaining reliable generator protection.
2Reliability
If the system sheds multiple loads sequentially when overload occurs, then the generator is protected, but the time to shed appropriate load increases and the generator may go offline
Solution Approach 1:
The system pre-establishes the priority sequence of all loads before operation. When overload occurs, it can immediately begin shedding loads following this predetermined priority sequence, eliminating the need for real-time decision-making and reducing the time the generator remains overloaded, thereby maintaining power supply continuity while ensuring generator protection.
3Ease of manufacture
If standard load shedding logic is used, then the system is simple to implement, but it does not accurately match the load profile of typical power sources or motor loads
Solution Approach 1:
The system allows the priority assignment and load characteristics to be dynamically adjusted based on actual operating conditions and load profiles. This enables the system to adapt to different generator types and motor load characteristics, improving the accuracy of load matching while maintaining ease of configuration through programmable parameters that can be set based on standard generator specifications.
Data Source
AI summary
Some embodiments relate to a method of adding and shedding loads that are connected to a generator. The method includes determining whether a plurality of loads is being supplied with power by the generator and then determining the total load that the generator is supplying to the plurality of loads. The method further includes determining whether to change a number of the loads in the plurality of loads based on the amount of load L that is being supplied by the generator. The method further includes determining an amount of time T in which to change the number of loads in the plurality of loads based on the amount of load that is being supplied by the generator.