Title of Invention

MULTIPLE FUNCTIONALITY SIMULATION APPARATUS FOR ELECTROSATATIC PRECIPITATOR CONTROLLER

Abstract Accordingly there is provided a multifunctionality ESP-Simulator for testing the functionality of an electrostatic precipitator controller, which is capable of performing multiple functional simulation, in particular simulation of high voltage transformer-rectifier signal conditions, rapping motor operating conditions, primary signal conditions, boiler load and opacity input conditions, which are occurring in the fields during the operation. The simulator is provided with a core module processor based hardware and associated software. According to the invention, the simulator hardware of the invention utilizes conventional operational amplifiers, digital integrated circuits (ICs), core module based intelligent processor, Liquid Crystal Display (LCD), Keypads, analog meters and push button switches. Analog signals of high voltage transformer-rectifier are simulated by the operational amplifier circuit and step down transformers. Alarm conditions of the high voltage transformer-rectifier are simulated by push buttons. User interface consisting of keypad and LCD display provides selection of functions to be simulated and the required values to be simulated. A I2C communication bus is utilized for interfacing boiler load and opacity input simulation circuit to the CPU. Opto-coupler and driver circuit enables the rapper motor feedback simulation. The invention further provides multi-master communication interface, particularly Controller Area Network (CAN) communication hardware in the simulator. This enables testing of CAN communication of electrostatic precipitator controller. The invented simulator with hardware and software provides the complete functionality simulation of the electrostatic precipitator controller.
Full Text -2-
FIELD OF INVENTION
The present invention relates to electrostatic precipitators used for
pollution control in thermal power plants, cement plants, glass plants
and steel plants. More particularly the present invention relates to a
multiple functionality ESP-simulator capable of interactively
simulating the field conditions occurring during the operation of
electrostatic precipitators.
BACKGROUND OF THE INVENTION
The electrostatic precipitators (hereinafter referred to as ESP) are
configured with number of fields, which have collecting and emitting
electrodes. A high electric field is generated between the electrodes
to charge the dust particles and collect the charged particles on the
collecting electrodes. High voltage is generated by means of a high
voltage transformer-rectifier. Rapping mechanism is used for
removing the collected dust layer from the collecting electrodes.

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Each field is provided with one high voltage transformer- rectifier and
rapping motors for collecting and emitting electrode rapping. The
transformer-rectifier and rapping motor are controlled and monitored
by a micro-controller based controller, generally called electrostatic
precipitator controller. The electrostatic precipitator controller
controls and monitors various electrical parameters like feedback
current, average voltage, peak voltage and valley voltage and alarm
conditions of the high voltage transformer-rectifier, primary signals,
rapping motor on/off feedback, boiler load and opacity input.
Electrostatic precipitator controllers are tested for their functionalities
with the help of simulators, which simulate the field conditions.
Conventional simulators individually simulate field signals like current,
voltage signals and alarm conditions. Integrated simulation like
simulating signals of rapping motor, boiler load and opacity input,
primary signals and signals of transformer-rectifier together is not
available with conventional simulators.
Some of the prior art apparatuses having analog and digital circuits
are nevertheless used for testing the functionality of electrostatic
precipitator controllers.

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Further, some of the prior art simulators adapted for functionality
testing of electrostatic precipitator controllers, are found to have
push buttons and light emitting diode indicators.
There are also available simulators for functionality testing of
electrostatic precipitator controllers having limited functional
simulation facility; without having means for rapping, boiler load and
opacity input simulation.
OBJECTS OF THE INVENTION
It is therefore an object of the invention to propose a
multifunctionality ESP-Simulator capable of simulating field conditions
during operation of an electrostatic precipitator controller.
Another object of the invention is to propose a multifunctionality ESP-
Simulator capable of simulating field conditions during operation of
an electrostatic precipitator controller , which has the capability to
simulate field conditions occurring in the ESP interactively.

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A still another object of the invention is to propose a
multifunctionality ESP-Simulator capable of simulating field conditions
during operation of an electrostatic precipitator controller, which is
capable of adapting multiple hardware and software for simulation of
field signals.
A further object of the invention is to propose a multifunctionality
ESP-Simulator capable of simulating field conditions during operation
of an electrostatic precipitator controller, which incorporates at least
one intelligent processor for implementing automatic functionality
testing.
A still further object of the invention is to propose a multifunctionality
ESP-Simulator capable of simulating field conditions during operation
of an electrostatic precipitator controller, which uses core module
processor based hardware and software to simulate the field
conditions.
Yet another object of the invention is to propose a multifunctionality
ESP-Simulator capable of simulating field conditions during operation
of an electrostatic precipitator controller, which is

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capable of simulating high voltage transformer-rectifier feed back
signals, rapping motor feedback signals, boiler load and opacity input
signals of the electrostatic precipitator.
SUMMARY OF THE INVENTION
Accordingly there is provided a multifunctionality ESP-Simulator for
testing the functionality of an electrostatic precipitator controller,
which is capable of performing multiple functional simulation, in
particular simulation of high voltage transformer-rectifier signal
conditions, rapping motor operating conditions, primary signal
conditions, boiler load and opacity input conditions, which are
occurring in the fields during the operation. The simulator is provided
with a core module processor based hardware and associated
software.
According to the invention, the simulator hardware of the invention
utilizes conventional operational amplifiers, digital integrated circuits
(ICs), core module based intelligent processor, Liquid Crystal Display
(LCD), Keypads, analog meters and push button switches. Analog

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signals of high voltage transformer-rectifier are simulated by the
operational amplifier circuit and step down transformers. Alarm
conditions of the high voltage transformer-rectifier are simulated by
push buttons. User interface consisting of keypad and LCD display
provides selection of functions to be simulated and the required
values to be simulated. A I2C communication bus is utilized for
interfacing boiler load and opacity input simulation circuit to the CPU.
Opto-coupler and driver circuit enables the rapper motor feedback
simulation. The invention further provides multi-master
communication interface, particularly Controller Area Network (CAN)
communication hardware in the simulator. This enables testing of
CAN communication of electrostatic precipitator controller.
The invented simulator with hardware and software provides the
complete functionality simulation of the electrostatic precipitator
controller.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Fig. 1 is a hardware block diagram of an ESP simulator for the
electrostatic precipitator controller according to the invention.

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Fig. 2 is a software logic diagram of the ESP-simulator for the
electrostatic precipitator controller according to the invention.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE
INVENTION
According to the invention, the multiple functionality ESP-Simulator is
incorporated with hardware and software implementation, and which
basically constitutes a core module based intelligent simulator for
simulating various field conditions. The hardware block diagram (18)
shown in Fig. 1 includes a Central processing block (1), an analog
simulation block (2), a Digital simulation block (9), a communication
interface block (8), a keyboard interface block (6), and a display
interface block (7).
The analog simulation block (2) further comprises a primary
simulation block (3), a current and voltage simulation block (4), and
an analog block (5). The analog block (5) has a 4-20mA simulation
means (not shown). The digital simulation block (9) has an alarm
simulation block (10), and a rapper feedback simulation block (11).

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The Analog simulation block (2) simulates the analog signals for
example, electrostatic precipitator current, average voltage, peak
voltage, valley voltage through the current & voltage simulation block
(4), and primary current and primary voltage through the primary
simulation block (3). The 4-20mA simulation block in the analog block
(5) simulates boiler load and opacity input and communicates to the
processor (1) through a I2C communication bus. The digital block (9)
simulates various alarm conditions of high voltage transformer-
rectifier through the alarm simulation block (10), and further
simulates the rapping motors signal through the rapper feedback
simulation block (11). The Keyboard and Liquid Crystal Display (6,7)
together provide an user interface to feed the simulation inputs and
view the status of the simulated parameters. The communication
interface block (8) communicates to the electrostatic precipitator
controller through a Controller Area Network communication bus (not
shown). The central processing block (1) interacts with all the
peripheral blocks like analog simulation block (2), digital simulation
block (9), keyboard interface block (6), display interface block (7)
and communication interface block (8) and provides simulation
signals along with the software.

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A Software logic (19) for the multiple functionality ESP simulator, is
shown in Fig 2, which comprises a main block (12), an analog
simulation block (15), a rapper simulation block (17), a
communication interface (16), a keyboard interface block (13), and a
display interface block (14).
The main block (12) initializes the processor and other peripherals
including the buffers for 4-20 mA simulation and rapper simulation.
The Analog simulation block (15) reads the set value from the user
interface and simulates the same. The rapper simulation block (17)
reads the digital inputs and simulates the rapper feedback and
provides the simulated data. The Keyboard (13) and the display block
(14) provides the user interface for the operator.
The complete hardware (18) and the software (19) of the ESP
simulator provides an integrated control for a multiple functionality
simulation for the electrostatic precipitator controller.

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We Claim:
1. A multifunctionality ESP-simulator for simulating the field
conditions occurring during operation of the electrostatic
precipitators (ESP), comprising:
- a core module processor based hardware block (18) for
simulating various field conditions; and
- a corresponding software module (19) for initializing the
processor including other peripherals, and providing
software support logic to the core module based
processor.
2. A multifunctionality ESP-simulator as claimed in claim 1,
wherein the hardware block (18) comprises a central
processing block (1); analog simulation block (2) for simulating
the analog signals namely analog signals for the ESP'S current,
average voltage, peak voltage, valley voltage, primary current
and primary voltage including simulation of boiler load and
opacity input; a digital block (10) for simulating various alarm
conditions of the high-voltage transformer-rectifier; a key board
interface block (6), and a display interface block (7) to provide
an user interface to feed the simulation inputs and view the
status of the simulated parameters; and a communication
interface block (8) for communicating to the electrostatic
precipitator through a CAN-communication bus.

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3. A multifunctionality ESP-Simulator as claimed in claims 1 or 2,
wherein the analog simulation block (2) comprises a primary
simulation block (3) for simulating the primary current-and
primary voltage of the electrostatic precipitator, and a current
and voltage simulation block (4) for simulation of the current,
average voltage, peak voltage, and valley voltage of the
electrostatic precipitator.
4. A multifunctionality ESP-simulator as claimed in claim 3,
wherein the analog simulation block (2) further comprising an
analog block (5) having a 4-20 mA simulation block which
simulates boiler load and opacity input and communicates to
the processor (1) via a I2c communication bus.
5. A multifunctionality ESP-simulator as claimed in any of the
preceeding claims, wherein the digital block (9) comprises an
alarm simulation block (10), and a rapper feed back simulation
block (11) for simulating respectively various alarm conditions
of the high voltage transformer rectifier, and the rapping
motors' signals.

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6. A multifunctionality ESP-simulator as claimed in claim 1,
wherein the associated software module (19) comprises a main
block (120, an analog simulation block (15), a rapper simulation
block (17), a communication interface block (16), a keyboard
interface block (13), and a display interface block (14).
7. A multifunctionality ESP-simulator as claimed in claim 6,
wherein the analog simulation block (15) reads a set value from
the user interface and simulates the set value, and wherein the
rapper simulation block (17) reads the digital inputs and
simulates the rapper feed back to provide the simulated data.
8. A multifunctionality ESP-simulator as claimed in claims 1 or 6,
wherein the keyboard block (13) and the display block (14)
provides the user interface for an operator.
9. A multifunctionality ESP-simulator for simulating the field
conditions occurring during operation of the electrostatic
precipitators (ESP), as substantially described and illustrated
herein with reference to the accompanying drawings.
Dated this 21st day of SEPTEMBER 2007

Accordingly there is provided a multifunctionality ESP-Simulator for
testing the functionality of an electrostatic precipitator controller,
which is capable of performing multiple functional simulation, in
particular simulation of high voltage transformer-rectifier signal
conditions, rapping motor operating conditions, primary signal
conditions, boiler load and opacity input conditions, which are
occurring in the fields during the operation. The simulator is provided
with a core module processor based hardware and associated
software.
According to the invention, the simulator hardware of the invention
utilizes conventional operational amplifiers, digital integrated circuits
(ICs), core module based intelligent processor, Liquid Crystal Display
(LCD), Keypads, analog meters and push button switches. Analog

signals of high voltage transformer-rectifier are simulated by the
operational amplifier circuit and step down transformers. Alarm
conditions of the high voltage transformer-rectifier are simulated by
push buttons. User interface consisting of keypad and LCD display
provides selection of functions to be simulated and the required
values to be simulated. A I2C communication bus is utilized for
interfacing boiler load and opacity input simulation circuit to the CPU.
Opto-coupler and driver circuit enables the rapper motor feedback
simulation. The invention further provides multi-master
communication interface, particularly Controller Area Network (CAN)
communication hardware in the simulator. This enables testing of
CAN communication of electrostatic precipitator controller.
The invented simulator with hardware and software provides the
complete functionality simulation of the electrostatic precipitator
controller.

Documents:

01313-kol-2007-abstract.pdf

01313-kol-2007-claims.pdf

01313-kol-2007-correspondence others 1.1.pdf

01313-kol-2007-correspondence others 1.2.pdf

01313-kol-2007-correspondence others.pdf

01313-kol-2007-description complete.pdf

01313-kol-2007-drawings.pdf

01313-kol-2007-form 1 1.1.pdf

01313-kol-2007-form 1.pdf

01313-kol-2007-form 18.pdf

01313-kol-2007-form 2.pdf

01313-kol-2007-form 3.pdf

01313-kol-2007-gpa.pdf

1313-KOL-2007-(17-07-2012)-ABSTRACT.pdf

1313-KOL-2007-(17-07-2012)-DRAWINGS.pdf

1313-KOL-2007-(17-07-2012)-EXAMINATION REPORT REPLY RECEIVED.pdf

1313-KOL-2007-(17-07-2012)-FORM-1.pdf

1313-KOL-2007-(17-07-2012)-FORM-2.pdf

1313-KOL-2007-(17-07-2012)-FORM-3.pdf

1313-KOL-2007-CORRESPONDENCE 1.1.pdf


Patent Number 262594
Indian Patent Application Number 1313/KOL/2007
PG Journal Number 36/2014
Publication Date 05-Sep-2014
Grant Date 28-Aug-2014
Date of Filing 21-Sep-2007
Name of Patentee BHARAT HEAVY ELECTRICALS LIMITED
Applicant Address REGIONAL OPERATIONS DIVISION (ROD) PLOT NO. 9/1, DJ BLOCK 3RD FLOOR, KARUNAMOYEE, SALT LAKE CITY, KOLKATA 700091, HAVING ITS REGISTERED OFFICE AT BHEL HOUSE SIRI FORT, NEW DELHI-110049
Inventors:
# Inventor's Name Inventor's Address
1 B. VENKATESHWAR BOILER AUXILIARIES PLANT, BHEL, RANIPET-632406
2 V.S. SURESHKUMAR BOILER AUXILIARIES PLANT, BHEL, RANIPET-632406
3 G.S. NAIK BOILER AUXILIARIES PLANT, BHEL, RANIPET-632406
4 K.K. SMITHBABU BOILER AUXILIARIES PLANT, BHEL, RANIPET-632406
5 K.P. MANIMALA BOILER AUXILIARIES PLANT, BHEL, RANIPET-632406
PCT International Classification Number B03C3/68; B03C3/66
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA