Storage Battery Management for Economic Load Distribution
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Solution Overview
Problem
Existing methods for managing storage batteries in power systems are inefficient, leading to high operational and maintenance costs, as they focus on short-term variations and do not effectively utilize the batteries' full capacity, resulting in surplus power being left unused and labor-intensive individual management.
Innovation Solution
A method and device that calculate and manage power amounts supplied by storage batteries in prearranged time zones, considering economic load distribution, restriction conditions, efficiency, and cost, to optimize their usage and reduce the need for frequent adjustments in electric generators, thereby allowing collective management and reducing labor and equipment investment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If storage batteries are managed individually by consumers for rationalization of power cost, then power cost is reduced on consumer side, but the full capacity of storage batteries cannot be utilized and surplus power remains unused
Solution Approach 1:
The patent merges individual storage battery management into a unified system where a management device coordinates multiple storage batteries and power sources collectively. This allows the aggregation of dispersed storage capacities to participate in economic load distribution control at the system level, thereby fully utilizing storage battery capacity while maintaining consumer-side cost benefits.
Solution Approach 2:
The management device provides multi-functional coordination, enabling storage batteries to simultaneously serve consumer power cost rationalization and system-level economic load distribution. The system can flexibly allocate storage battery output between local consumption and system-wide load balancing, maximizing the versatility and utilization of storage resources.
2Reliability
If storage batteries are used to control current at linkage point between micro-grids and power system, then current control is achieved, but complicated control systems and permanent management staff are required
Solution Approach 1:
The management device automatically performs current control at the linkage point by coordinating storage battery output based on system conditions. The system self-regulates the current contribution from storage batteries to maintain linkage point stability without requiring permanent human management staff or overly complicated control mechanisms.
Solution Approach 2:
The system implements feedback control where the management device continuously monitors system conditions and adjusts storage battery output accordingly. This automated feedback mechanism ensures reliable current control at the linkage point while simplifying the control system structure by using intelligent algorithms rather than complex hardware controls.
3Object-generated harmful factors
If thermal electric generators are reduced to decrease greenhouse gas emissions, then environmental impact is reduced, but adjustment between demand and supply of electric power becomes difficult
Solution Approach 1:
The patent changes the operational parameters of storage batteries from static consumer-side use to dynamic system-wide participation. By adjusting storage battery charge/discharge cycles based on economic load distribution requirements, the system compensates for the reduced flexibility of thermal generators while maintaining low emissions.
Solution Approach 2:
Storage batteries serve as an intermediary resource between renewable power sources and system demand. The management device coordinates storage battery output to fill the flexibility gap left by reduced thermal generation, enabling demand-supply adjustment without relying on greenhouse gas-emitting generators.
4Reliability
If storage batteries are utilized for short-term variations in power system, then short-term balance is improved, but long-term economic load distribution is not optimized
Solution Approach 1:
The patent extends the useful action of storage batteries from short-term fluctuations to continuous participation in economic load distribution. The management device integrates storage battery operation into the overall economic optimization framework, ensuring that storage resources contribute to both short-term balance and long-term economic efficiency in a coordinated manner.
Data Source
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AI summary
The purpose of the present invention is to provide a method and device for operating a power system, and a rechargeable-battery management device, that extract maximum performance from rechargeable batteries and use said batteries evenly while taking into consideration cost and the operation of the batteries. In order to solve said problem, in this method for operating a power system provided with a plurality of rechargeable-battery devices and a plurality of electric generators, the amount of power that a rechargeable battery available during a scheduled time period on a scheduled date will be able to supply is determined, an economic-dispatch calculation including the determined amount of power that the aforementioned rechargeable battery will be able to supply is performed for the power system, and said rechargeable battery is used to supply power during the scheduled time period on the scheduled date.