metrics Class Reference
[Metrics, Reliability analysis module]

Detailed Description

The metric analysis object reports reliability metrics for a system by observing the duration and number of conditions when meter objects are not normal.

The following metrics are calculated annual and reported to the report_file

SAIFI (System average interrupts frequency index) indicates how often the average customer experiences a system interruption over a predefined period of time. This is calculated using the formula

$SAIFI = \frac{\Sigma N_{customer\_interruptions}}{N_{customers}}$

SAIDI (System average interrupts duration index) indicates the total duration of interrupt for the average customer during a predefined period of time. This is calculated using the formula

$SAIDI = \frac{\Sigma T_{customer\_interruptions}}{N_{customers}}$

CAIDI (Customer average interrupt duration index) represents the average time required to restore service. This is calculated using the formula

$CAIDI = \frac{\Sigma T_{customer\_interruptions}}{N_{customers\_interrupted}}$

CAIFI (Customer average interruption frequency index) gives the average freqeuncy of sustained interruptions. The customer is counted once, regardless of the number of times interrupted. This is calculated using the formula

$CAIFI = \frac{\Sigma N_{customers\_interrupted}}{N_{customers\_interrupted}}$

See IEEE Std 1366-2003 IEEE Guide for Electric Power Distribution Reliability Indices for more information on how to compute distribution system reliability indices.

Definition at line 47 of file metrics.h.


Public Member Functions
void	end_event (OBJECT obj, const char targets, char *old_values)
	Restores service after an event.
OBJECT *	start_event (EVENT pEvent, FINDLIST objectlist, const char targets, char event_values, char *old_values, int size)
	Initiates an event and records it in the event log.

Member Function Documentation

void metrics::end_event	(	OBJECT *	obj,
		const char *	targets,
		char *	old_values
	)

Restores service after an event.

Parameters:

obj	the object which is to be restored
targets	the properties to be restored
old_values	the old values to be restored

Definition at line 267 of file metrics.cpp.

References gl_find_next, gl_find_objects, gl_findlist_copy, gl_free, and gl_object_isa.

OBJECT * metrics::start_event	(	EVENT *	pEvent,
		FINDLIST *	objectlist,
		const char *	targets,
		char *	event_values,
		char *	old_values,
		int	size
	)

Initiates an event and records it in the event log.

Returns:: a pointer to the object affected by the event

Parameters:

pEvent	a pointer to the EVENT structure that defines this event
objectlist	the list of objects to be affected by the event
targets	the list of object properties to be modified
event_values	the list of values to be used when modifying the properties
old_values	storage space for the old values before modification
size	the size of the storage space for old values

Definition at line 199 of file metrics.cpp.

References gl_find_next, gl_findlist_copy, gl_localtime, gl_random_uniform, and gl_strtime.

The documentation for this class was generated from the following files:

reliability/metrics.h
reliability/metrics.cpp

metrics Class Reference [Metrics, Reliability analysis module]

Detailed Description

Public Member Functions

Member Function Documentation

metrics Class Reference
[Metrics, Reliability analysis module]