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ABT Energy Management
Market Operations in a power system has become one of the key requirements for fair and competitive operations after increasing deregulation and restructuring of the Electricity Boards. In India, Availability Based Tariff (ABT) is as a pricing mechanism for bulk power and has been introduced by the Central Electricity Regulatory Commission based on the extent of frequency fluctuations across various stakeholders in a power system.
ABT mechanism is based on net-metering and came into prominence because of wide frequency fluctuations that results in losses to both the generating and load ends. During peak load hours, the frequency may be low by 1.5-2Hz for many hours every day and vice-versa for off-peak hours. Further, grid disturbances caused by one party, takes its toll on all grid participants and could lead to tripping of generating stations or long power outages and even to disintegration of regional grids. To implement an ABT regime, it is critical that energy data is available periodically as required. AMR or Automated Meter Reading essentially facilitates the ABT in acquiring this data.
Support Documents
Kalkitech's solution for Availability Based Tariff system in Generation plants is based on its inhouse developed software called ELTRIX. The ELTRIX system has built in an integrated modular architecture having high flexibility and scalability to cater to the evolving nature of the regulations scenario. It has the following modules viz., Communication Module, Data Import Module, Database including Data validation, ABT Scheduling module including generation of Declared Capacity, Implemented Schedule, Tariff Modeling Module, Tariff Module including Tariff calculations, GUI and Reports Module and Security Layer.
Typical Parameters to be monitored includes:
ABT related data (Declared Capacity, Schedule Generation, Actual Generation, Frequency) will be available to the client in the form of Tabular display / trend / report at plant level and at the GCC. This will include feature for entry of DC and SG values at each plant by the client's authorized users. Data will be logged for each Time Block, to enable historical analysis. The operator can then monitor the actual Ex-bus generation and frequency, and compare these values with schedule generation given by the State Load Dispatch Centre (SLDC) on-line. This would enable the client to match actual generation with scheduled values, in order to maximize revenue and run the plant efficiently.
Typical Parameters to be monitored includes:
- Current Period Average Frequency
- Current Period Forward Active Energy
- Current Period Reverse Active Energy
- Current Period Forward Reactive Energy
- Current Period Reverse Reactive Energy
- Previous Period Average Frequency
- Previous Period Forward Active Energy
- Previous Period Reverse Active Energy
- Previous Period Forward Reactive Energy
- Previous Period Reverse Reactive Energy
- Cumulative Active Energy import / export at midnight
- Cumulative Reactive Energy High and Low
ABT related data (Declared Capacity, Schedule Generation, Actual Generation, Frequency) will be available to the client in the form of Tabular display / trend / report at plant level and at the GCC. This will include feature for entry of DC and SG values at each plant by the client's authorized users. Data will be logged for each Time Block, to enable historical analysis. The operator can then monitor the actual Ex-bus generation and frequency, and compare these values with schedule generation given by the State Load Dispatch Centre (SLDC) on-line. This would enable the client to match actual generation with scheduled values, in order to maximize revenue and run the plant efficiently.
A typical ABT implementation architecture is shown below:
Kalkitech ABT solution helps to:
- Avoid mis-declaration penalty
- Minimize vulnerability of negative UI
- Increase positive UI within gaming constraints
- Minimize cost of generation at plant and company levels
- Minimize down time: enabled by Plant performance monitoring for Unit equipments and auxiliaries and hence increase productivity
- Avoid exceeding auxiliary consumption limit by on-line monitoring and hence minimize penalty
- Automated reporting
- Increase PLF and availability
- Achieve full capacity charges realization
- Make eligible for incentives with respect to higher PLF
- Opportunities lost monitoring and advice corrective action on generation in next blocks to achieve PLF and positive UI
- Active and reactive energy accounting
- Financial performance monitoring (with respect to ABT)
- Data storage (regulation requires 2 years data storage), archival and analysis reports for future planning and enhancement.
ELTRIX ABT Module
ELTRIX Generation Management / ABT modules eliminate the need for complex manual processing and calculations done by plant managers, also protect the interests of generation company or a plant in all its energy transactions. This provides decision support in maintaining the regulatory compliance and grid code.
The functionalities of ELTRIX Generation Management module includes the following:
ELTRIX Generation Management / ABT modules eliminate the need for complex manual processing and calculations done by plant managers, also protect the interests of generation company or a plant in all its energy transactions. This provides decision support in maintaining the regulatory compliance and grid code.
The functionalities of ELTRIX Generation Management module includes the following:
- Closely monitoring the grid frequency, AGC operations and plant output in terms of energy exported to grid
- Real-time inputs to the operators on the asking rate scheduled on generation and slippages
- Accounting the energy transactions as well as slippages from the scheduled generation
- Computation of various Tariffs like Capacity Charges, Energy Charges and Unscheduled Interchange (UI) Charges
- Interacting with the Independent System Operators or Load Dispatch Center
- Complying to regulations and grid code.
Grid Metering Products
Kalkitech Grid metering system helps the utilities to automatically read the data, remotely configure the system, collect load data and further manage, process and analyze the gathered data to produce the required reports and graphs. The AMR system helps to gather the data required by the ABT software on a 15 minute block basis as required and can consist of the following components:
- Server System and CDCS at Main Control Centre along with MDAS
- Meter Data Mangement Software
- Data Concentrator Unit (DCU)
- Supply of Interface Convertor Unit (ICU) wherever required
- Network Hardware and Cables
- GSM / GPRS / PSTN Modems
- Standard database (RDMS) for storage of data at Central Control Centre
- Normalized structure of database
