ifference between revisions of "EMO:Glossary"
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=== Current Data Set === | === Current Data Set === | ||
| − | The set of data currently being displayed in the Presentation Interface. Most of the Presentation Interface functions are concerned with viewing or manipulating the | + | The set of data currently being displayed in the Presentation Interface. Most of the Presentation Interface functions are concerned with viewing or manipulating the current data set. The current data set may be: |
| + | *A single Trading Period from the Market Data Source | ||
| + | *A single Period from a Forecast output | ||
| + | *A summary of all or a range of periods from a Forecast output | ||
| + | *A single Trading Period from a Scenario | ||
| + | |||
| + | === Data Grid === | ||
| + | The generic data entry and maintenance component of the Presentation Interface. | ||
| + | |||
| + | All textual data entered through the Presentation Interface is entered through the Data Grid which can appear as: | ||
| + | *A single data entry field | ||
| + | *A column of data entry fields | ||
| + | *A row of data entry fields | ||
| + | *A table ("grid") of data entry fields | ||
| + | |||
| + | === Data Source === | ||
| + | A context for interpreting data viewed in ''EMarketOffer's'' Presentation Interface (Maps, Reports, Charts and Information Windows). There are three Data Sources: Market, Forecast and Scenario. | ||
| + | |||
| + | === Database Connection Configuration === | ||
| + | A logical set of standard SQL queries that can be used to access one or more different databases to provide input data for ''EMarketOffer''. Different Configurations allow the same logical data to be accessed from different physical sources. This allows for instance load data to be obtained from tables containing GXP global or SPD Daily Demand data. It also allows the same computer to access local or corporate databases which may be useful for mobile users. Only one configuration can be used for any given operation (e.g. loading data into a '''''Forecast Definition'''''). | ||
| + | |||
| + | === Demand === | ||
| + | The rate of consumption of electrical energy measured in MW/h (1 MW/h = the electrical energy consumed by a 1,000,000 watt appliance in one hour) | ||
| + | |||
| + | === Demand Profile === | ||
| + | A weekly (Mon - Sun) map of Demand for a given Node expressed as a series of Trading Period quantities used in Forecasting. | ||
| + | |||
| + | === Directory Structure === | ||
| + | One of two hierarchical folder structures for storing ''EMarketOffer'' program files and data files. The program folders must be stored on the local hard drive, while data files may be stored on network drive though this is not recommended. | ||
| + | |||
| + | === Dispatch === | ||
| + | The process of calculating the key Market and Transmission System data for a single historical or forecast Trading Period: | ||
| + | #Using historical Demand, Generation and Transmission System configuration to calculate Powerflows for all Circuits | ||
| + | #Using a Forecast Definition (Demand, Offers and Transmission System configuration) to calculate Price, Generation and Powerflows | ||
| + | |||
| + | === Dispatch Factor === | ||
| + | Any individual 'fact' (Attribute) required to calculate a dispatch. | ||
| + | |||
| + | === Effective Date Range === | ||
| + | The user-defined date range specified in a Forecast Definition expressed as a Start Date and Start Trading Period and an End Date and End Trading Period. Forecast output will contain data for every Trading Period between and including the Effective Date Range start and end Trading Periods. Any date and time (past or future) can be used in the date range, providing the end point follows the start point in time. | ||
| + | |||
| + | === Equation Constraint === | ||
| + | Specifically within ''EMarketOffer:'' any constraint placed by the System Operator on the combined Powerflow of more than one Circuit. | ||
| + | |||
| + | === Forecast (n) === | ||
| + | The output (data set) from a single execution of the model from a '''''Forecast Definition'''''. | ||
| + | |||
| + | === Forecast (v) === | ||
| + | The process of using the ''EMarketOffer'' model to simulate the behaviour of the NZ electricity Market under a specific set of conditions. | ||
| + | |||
| + | === Forecast Data Source === | ||
| + | Provides data from Forecast output for viewing in the Presentation Interface and Reports. | ||
| + | |||
| + | === Forecast Definition === | ||
| + | The set of input data required by ''EMarketOffer'' to effectively execute a single Forecast Run of the model. | ||
| + | |||
| + | === Forecast Summary === | ||
| + | A special variant of the Current Data Set in which the key data across all periods of a Forecast Run are summarised. | ||
| + | |||
| + | === Forecaster === | ||
| + | The ''EMarketOffer'' function that replicates the operation of SPD to produce Forecast output for a specified period of time using a set of user-defined forecast parameters collectively called the Forecast Definition. | ||
| + | |||
| + | === Generation === | ||
| + | The electrical energy produced by one or more generation units measured in MW or MW/h. | ||
| + | |||
| + | === Generation Company === | ||
| + | A real or supposed Company offering electricity into the NZ Electricity Market. | ||
| + | |||
| + | === Infeasibility === | ||
| + | A situation in which a feasible dispatch solution cannot be calculated from a given set of Dispatch Factors. | ||
| + | |||
| + | === Information Grid === | ||
| + | Display elements appearing in the Main Window and in Secondary Windows to present text-based information in a Data Grid. | ||
| + | |||
| + | === Information Window === | ||
| + | An independent Window primarily used for displaying and editing static data related to '''''Modelled Items.''''' | ||
| + | |||
| + | === Main Window === | ||
| + | The primary control and presentation interface for operating the system and viewing output. | ||
| + | |||
| + | === Map === | ||
| + | A multi-featured map-based graphical presentation of the Current Data Set. | ||
| + | |||
| + | === Marginal Generator === | ||
| + | A Generation Unit, the output of which varies in response to changes in load while the output of other Units is held constant. | ||
| + | |||
| + | === Market === | ||
| + | The New Zealand electricity wholesale market where the spot price for electricity is determined. | ||
| + | |||
| + | === Market Analyser === | ||
| + | An ''EMarketOffer'' feature that derives Powerflows for actual Trading Periods using historical Demand and Generation data. | ||
| + | |||
| + | === Market Data Source === | ||
| + | The Market Data Source provides historical Market data for viewing in the Presentation Interface and Reports. | ||
| + | |||
| + | === Market Operator === | ||
| + | A collective term for the providers of a number of operational and administrative services to the market under the wholesale and retail sections of the rules. | ||
| + | |||
| + | === Market Participant === | ||
| + | Any party involved in the regulation and operation of the NZ electricity Market: | ||
| + | *retailers | ||
| + | *distributors | ||
| + | *generation companies | ||
| + | *consumers | ||
| + | *line owners | ||
| + | *service providers | ||
| + | *metering equipment owners | ||
| + | *ancillary service agents | ||
| + | *data administrators | ||
| + | *system operator | ||
| + | |||
| + | === Modelled Item === | ||
| + | Any 'thing' (physical or conceptual) the overall state of which may change through time (typically, but not necessarily every Trading Period). An Item either provides input information for a dispatch simulation (Dispatch Factor) or is used to organise dispatch output. | ||
| + | |||
| + | === Offer === | ||
| + | An offer by a Generation Company to sell a quantity of electricity at a specified price for a specific trading period. | ||
| + | |||
| + | === Offer Stack === | ||
| + | The stack of individual offers created when all the offers to sell electricity for a given Trading Period are ranked in price order. | ||
| + | |||
| + | === Offers Profile === | ||
| + | A weekly (Mon - Sun) map of Offers for a given Generation Unit used in Forecasting and expressed as a series of 1 to 5 offered Price and Quantity pairs per Trading Period. | ||
| + | |||
| + | === Online Database === | ||
| + | A database owned by an organisation using ''EMarketOffer'' and containing relevant Market or Transmission System data in relational format. | ||
| + | |||
| + | === Powerflow === | ||
| + | For a given circuit, the average quantity of electricity (in MW) calculated to be flowing in the circuit in any one trading period. | ||
| + | |||
| + | === Powerflow Case === | ||
| + | The overall context for a single Powerflow analysis. It is the basic element associated with the Powerflow Data Source and is comprised of the Powerflow Case Definition and the Powerflow Case Output. | ||
| + | |||
| + | === Presentation Interface === | ||
| + | The collection of on-screen information presentation features that allow you to visualise the Current Data Set. | ||
| + | |||
| + | === Price === | ||
| + | The price of electricity calculated through dispatch for a single Market Node in a single Trading Period. | ||
| + | |||
| + | === Region === | ||
| + | A user-defined collection of Nodes that may or may not share a common location. Regions are not mutually exclusive and a Node may appear in more than one ''EMarketOffer'' Region. A Region becomes a Master Region when it is associated with one or more Sub-Regions. | ||
| + | |||
| + | === Run === | ||
| + | A single execution of the ''EMarketOffer'' model using a specified '''''Forecast Definition''''' to create a single Forecast output data set. | ||
| + | |||
| + | === Scenario === | ||
| + | A Scenario is a specialised ''EMarketOffer'' Data Source: a snap shot of a single Trading Period created from either a Market or a Forecast Data Source. Unlike other Data Sources the Current Data Set underlying a Scenario can be manually edited. | ||
Revision as of 14:12, 30 January 2013
Attribute
A single data item describing a Modelled Item (e.g. Price at a Node for a single Trading Period)
Circuit
A link, either a line or a transformer, with electrical characteristics such as Resistance and Reactance and which is capable of carrying a Powerflow on the Transmission System.
COMIT
Commodity Market Information and Trading System: an electronic trading and information system operated by MCo.
Constraint
A constraint occurs when one or more Circuits reaches its local maximum carrying capacity set by the System Operator to maintain grid security or power quality.
Current Data Set
The set of data currently being displayed in the Presentation Interface. Most of the Presentation Interface functions are concerned with viewing or manipulating the current data set. The current data set may be:
- A single Trading Period from the Market Data Source
- A single Period from a Forecast output
- A summary of all or a range of periods from a Forecast output
- A single Trading Period from a Scenario
Data Grid
The generic data entry and maintenance component of the Presentation Interface.
All textual data entered through the Presentation Interface is entered through the Data Grid which can appear as:
- A single data entry field
- A column of data entry fields
- A row of data entry fields
- A table ("grid") of data entry fields
Data Source
A context for interpreting data viewed in EMarketOffer's Presentation Interface (Maps, Reports, Charts and Information Windows). There are three Data Sources: Market, Forecast and Scenario.
Database Connection Configuration
A logical set of standard SQL queries that can be used to access one or more different databases to provide input data for EMarketOffer. Different Configurations allow the same logical data to be accessed from different physical sources. This allows for instance load data to be obtained from tables containing GXP global or SPD Daily Demand data. It also allows the same computer to access local or corporate databases which may be useful for mobile users. Only one configuration can be used for any given operation (e.g. loading data into a Forecast Definition).
Demand
The rate of consumption of electrical energy measured in MW/h (1 MW/h = the electrical energy consumed by a 1,000,000 watt appliance in one hour)
Demand Profile
A weekly (Mon - Sun) map of Demand for a given Node expressed as a series of Trading Period quantities used in Forecasting.
Directory Structure
One of two hierarchical folder structures for storing EMarketOffer program files and data files. The program folders must be stored on the local hard drive, while data files may be stored on network drive though this is not recommended.
Dispatch
The process of calculating the key Market and Transmission System data for a single historical or forecast Trading Period:
- Using historical Demand, Generation and Transmission System configuration to calculate Powerflows for all Circuits
- Using a Forecast Definition (Demand, Offers and Transmission System configuration) to calculate Price, Generation and Powerflows
Dispatch Factor
Any individual 'fact' (Attribute) required to calculate a dispatch.
Effective Date Range
The user-defined date range specified in a Forecast Definition expressed as a Start Date and Start Trading Period and an End Date and End Trading Period. Forecast output will contain data for every Trading Period between and including the Effective Date Range start and end Trading Periods. Any date and time (past or future) can be used in the date range, providing the end point follows the start point in time.
Equation Constraint
Specifically within EMarketOffer: any constraint placed by the System Operator on the combined Powerflow of more than one Circuit.
Forecast (n)
The output (data set) from a single execution of the model from a Forecast Definition.
Forecast (v)
The process of using the EMarketOffer model to simulate the behaviour of the NZ electricity Market under a specific set of conditions.
Forecast Data Source
Provides data from Forecast output for viewing in the Presentation Interface and Reports.
Forecast Definition
The set of input data required by EMarketOffer to effectively execute a single Forecast Run of the model.
Forecast Summary
A special variant of the Current Data Set in which the key data across all periods of a Forecast Run are summarised.
Forecaster
The EMarketOffer function that replicates the operation of SPD to produce Forecast output for a specified period of time using a set of user-defined forecast parameters collectively called the Forecast Definition.
Generation
The electrical energy produced by one or more generation units measured in MW or MW/h.
Generation Company
A real or supposed Company offering electricity into the NZ Electricity Market.
Infeasibility
A situation in which a feasible dispatch solution cannot be calculated from a given set of Dispatch Factors.
Information Grid
Display elements appearing in the Main Window and in Secondary Windows to present text-based information in a Data Grid.
Information Window
An independent Window primarily used for displaying and editing static data related to Modelled Items.
Main Window
The primary control and presentation interface for operating the system and viewing output.
Map
A multi-featured map-based graphical presentation of the Current Data Set.
Marginal Generator
A Generation Unit, the output of which varies in response to changes in load while the output of other Units is held constant.
Market
The New Zealand electricity wholesale market where the spot price for electricity is determined.
Market Analyser
An EMarketOffer feature that derives Powerflows for actual Trading Periods using historical Demand and Generation data.
Market Data Source
The Market Data Source provides historical Market data for viewing in the Presentation Interface and Reports.
Market Operator
A collective term for the providers of a number of operational and administrative services to the market under the wholesale and retail sections of the rules.
Market Participant
Any party involved in the regulation and operation of the NZ electricity Market:
- retailers
- distributors
- generation companies
- consumers
- line owners
- service providers
- metering equipment owners
- ancillary service agents
- data administrators
- system operator
Modelled Item
Any 'thing' (physical or conceptual) the overall state of which may change through time (typically, but not necessarily every Trading Period). An Item either provides input information for a dispatch simulation (Dispatch Factor) or is used to organise dispatch output.
Offer
An offer by a Generation Company to sell a quantity of electricity at a specified price for a specific trading period.
Offer Stack
The stack of individual offers created when all the offers to sell electricity for a given Trading Period are ranked in price order.
Offers Profile
A weekly (Mon - Sun) map of Offers for a given Generation Unit used in Forecasting and expressed as a series of 1 to 5 offered Price and Quantity pairs per Trading Period.
Online Database
A database owned by an organisation using EMarketOffer and containing relevant Market or Transmission System data in relational format.
Powerflow
For a given circuit, the average quantity of electricity (in MW) calculated to be flowing in the circuit in any one trading period.
Powerflow Case
The overall context for a single Powerflow analysis. It is the basic element associated with the Powerflow Data Source and is comprised of the Powerflow Case Definition and the Powerflow Case Output.
Presentation Interface
The collection of on-screen information presentation features that allow you to visualise the Current Data Set.
Price
The price of electricity calculated through dispatch for a single Market Node in a single Trading Period.
Region
A user-defined collection of Nodes that may or may not share a common location. Regions are not mutually exclusive and a Node may appear in more than one EMarketOffer Region. A Region becomes a Master Region when it is associated with one or more Sub-Regions.
Run
A single execution of the EMarketOffer model using a specified Forecast Definition to create a single Forecast output data set.
Scenario
A Scenario is a specialised EMarketOffer Data Source: a snap shot of a single Trading Period created from either a Market or a Forecast Data Source. Unlike other Data Sources the Current Data Set underlying a Scenario can be manually edited.