SYSTEM FOR VOLTAGE REGULATION, CONTROL PROTECTION AND MONITORING OF STATE OF CHANGERS UNDER POWER TRANSFORMER LOAD, VOLTAGE REGULATORS, CAPACITOR BANKS AND SIMILAR
First Claim
1. SYSTEM FOR VOLTAGE REGULATION, CONTROL, PROTECTION AND MONITORING OF STATE OF CHANGERS UNDER POWER TRANSFORMER LOAD, VOLTAGE REGULATORS, CAPACITOR BANKS AND SIMILAR, preferably applies to power transformers (1) and voltage regulators and similar, used in electric power generation, transmission and distribution systems, usually changing the load output voltage value (13) in relation to input voltage (14), with windings equipped with taps (15), connected to an Onload Tap Changer (CDC) that makes tap change with energized transformer (T) and connected load, to that end the CDC has a motorized drive mechanism (M) that obeys input signals to raise and lop the tap (16);
- to perform the voltage regulator function, output voltage measurement is made (17) by means of a power transformer (PT) and load current (′
17) by means of a current transformer (CT), characterized by proposed regulation system (S) consisting of a microprocessor (2) that with said voltage and current measurements (17 and 17′
) provides new functions and features, allowing to be programmed by means of a man-machine interface such as, for example, key board and display (3), or serial communication (4) several settings and different voltage regulation parameters, each setting suitable for a given prevailing load condition, performed by means of dry contact inputs (5), output contacts being (6) destined for self-diagnosis and alarm signaling (7);
voltage regulation allows parameter selection to be made by means of daily and hourly programming through an internal clock (8);
said system (S) also has the non-volatile memory function (9);
CDC blocking function (10) that directly acts on CDC motorized drive (12);
tap maintenance assistant function, CDC maintenance assistant function;
smart programming and correct synchronism and programming signaling function.
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Abstract
System for voltage regulation, control, protection and monitoring of state of changers under power transformer load, voltage regulators, capacitor banks and similar”, is preferably applied to power transformers (1) and voltage regulators and similar, through a microprocessor (2) it provides innovating functions that make up for deficiencies of currently existing voltage relays, highlighting pre-programming, by means of man-machine interface such as, for example, keyboard and display (3), or serial communication (4) of several settings and different voltage regulation parameters, each adequate setting for a certain prevailing load condition, performed by means of dry contact inputs (5), contact outputs (6) destined for self-diagnosis signaling and alarms (7); voltage regulation allows parameter selection to be made by means of daily and hourly programming through an internal clock (8); said system (S) also has the non-volatile memory function (9); CDC blocking function (10) that directly acts on the motorized drive (11) of the CDC; and maintenance assistant functions of the changer under load (10).
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Citations
29 Claims
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1. SYSTEM FOR VOLTAGE REGULATION, CONTROL, PROTECTION AND MONITORING OF STATE OF CHANGERS UNDER POWER TRANSFORMER LOAD, VOLTAGE REGULATORS, CAPACITOR BANKS AND SIMILAR, preferably applies to power transformers (1) and voltage regulators and similar, used in electric power generation, transmission and distribution systems, usually changing the load output voltage value (13) in relation to input voltage (14), with windings equipped with taps (15), connected to an Onload Tap Changer (CDC) that makes tap change with energized transformer (T) and connected load, to that end the CDC has a motorized drive mechanism (M) that obeys input signals to raise and lop the tap (16);
- to perform the voltage regulator function, output voltage measurement is made (17) by means of a power transformer (PT) and load current (′
17) by means of a current transformer (CT), characterized by proposed regulation system (S) consisting of a microprocessor (2) that with said voltage and current measurements (17 and 17′
) provides new functions and features, allowing to be programmed by means of a man-machine interface such as, for example, key board and display (3), or serial communication (4) several settings and different voltage regulation parameters, each setting suitable for a given prevailing load condition, performed by means of dry contact inputs (5), output contacts being (6) destined for self-diagnosis and alarm signaling (7);
voltage regulation allows parameter selection to be made by means of daily and hourly programming through an internal clock (8);
said system (S) also has the non-volatile memory function (9);
CDC blocking function (10) that directly acts on CDC motorized drive (12);
tap maintenance assistant function, CDC maintenance assistant function;
smart programming and correct synchronism and programming signaling function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
- to perform the voltage regulator function, output voltage measurement is made (17) by means of a power transformer (PT) and load current (′
Specification