Mearuring

Proceedings of the World Congress on Engineering 2011 Vol II
WCE 2011, July 6 - 8, 2011, London, U.K.

Measuring the Quality Indicators of the Electric
Energy Service
Robín A. Peña, Víctor A. Gómez, Cesar Hernández

Abstract—This article presents the design and construction
of a prototype to measure the quality indicators of the
electric energy service, which has capacity to measure thediscontinuity in the service based on a voltage presence
sensor that generates logic states in its exit, so the algorithm
designed in a high level C and implemented in the
microcontroller PIC18F2550, can register the events
occurred in a period of three months. The prototype is built
mainly by a liquid crystal display, a microcontroller, an
external memory and a real time clock. Thismeasuring
device has a low functional cost, high memory to register the
events and a high precision level in measuring the duration
of interruptions.
Index Terms—DES, FES, service quality,
microcontroller, memory, real time watch

I.

sensor,

INTRODUCTION

T

ODAY with the advance in technology, as
mentioned in [1] [2], most of the electric and
electronic equipments of domestic andindustrial use are
more vulnerable to variations in the fundamental
working. Therefore, the continuity in the electric energy
service is important. On the other hand, the user is made
firm to the indicators informed by the company through
the invoice, and in consequence to the economic
compensation that is calculated based on these indicators.
[3], and does not know with certainty if in anytrimester,
the quality of service has been paid to be inferior
according to the established stuff by the regulations of the
Gas and Energy Regulations Commission (CREG).
In consequence, there is not in the market a measuring
device that has the necessary characteristics for the
trimester registry of the quality indicators that provide
support to the residential costumer to demand hiscompensation when the maximum values have been
surpassed.
On the other hand, the existing measuring devices [4]
have a high cost, which makes them inaccessible for the
residential user.
Robin A. Peña is Electricity Technician, Distrital University
“Francisco José de Caldas”.
Victor A. Gómez is Electricity Technician, Distrital Universidad
“Francisco José de Caldas”.
Cesar Hernández is ElectronicEngineer, Electric Engineering
Department, Distrital University “Francisco José de Caldas”
cahernandezs@udistrital.edu.co

ISBN: 978-988-19251-4-5
ISSN: 2078-0958 (Print); ISSN: 2078-0966 (Online)

The development of the project begins with the selection
of the technology to be implemented and the acquisition
of the required knowledge. It is selected a high level
microcontroller withmicrochip (PIC18F2550), due to its
versatility, high processing level, memory capacity,
analog-digital ports, Universal Serial Bus Communication
(USB), good availability in the market and low cost. [5].
Also, for the design of the algorithm, a compiler CCS C
(PIC C Compiler) was used for its easiness in relationship
with the tools for the interfaces with external devices as a
real time clock(DS1302), a crystal liquid display (LCD)
and an external memory EEPROM (Electrically-Erasable
Programmable Read-Only Memory) [6].
Then, the voltage sensor was designed based on the
theory of the semiconductor devices. At the end the
autonomous feeding of the prototype was designed. In
fig. 1 a block diagram of the prototype design is
illustrated where modules can been checked.
According tothe study of parameters, and the
requirements of the measuring device, it has to measure
the entry variable (network voltage) by a voltage sensor
and based on the lecture of it, store in a memory the
interruptions in the continuity of the electric energy
service, taking in consideration the hour and date of the
events done to show them in an LCD screen.

II.

ARCHITECTURE OF THE...