EP3117282A1 - Parallel and redundant voltage regulator system - Google Patents
Parallel and redundant voltage regulator systemInfo
- Publication number
- EP3117282A1 EP3117282A1 EP15739361.2A EP15739361A EP3117282A1 EP 3117282 A1 EP3117282 A1 EP 3117282A1 EP 15739361 A EP15739361 A EP 15739361A EP 3117282 A1 EP3117282 A1 EP 3117282A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavs
- information
- thyristor
- pmu
- test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
Definitions
- the invention relates to voltage regulators and stabilizers which are used in places where line voltages are low and/or high; in all the applications where industrial or commercial electrical device and machines are required to be fed with regular and stable voltage; in all the electrical devices operating with single-phase and/or three-phase AC power; especially in high-capacity factories; in the plants where lack of electricity or voltage instability negatively affect the operation of the machines and devices or cause problems and loss of performance in the workflow; in the regulation and stabilization of AC voltage.
- Voltage regulators used in the regulation of AC voltage are produced in different technologies such as mechanical, electromechanical, electronic and resonance.
- Voltage regulators produced with the current technology are produced up to 3000kva-4000kva as three-phase.
- As supplying current carrying elements such as on-off switch, protection fuse, thyristor, transistor, IGBT, and variac, which are required to produce a higher power voltage regulator, is not possible or very expensive, a regulator with a power higher than 4000kva cannot be produced.
- machines are required to be separated in 4000kva groups.
- the present invention aims to eliminate the above mentioned drawbacks.
- the main object of the invention is to obtain a voltage regulator which is connected in parallel, has a redundancy feature and operate synchronously, for the plants with a power higher than 4000kva.
- the second main object of the invention is to obtain regulators operating simultaneously, in parallel and synchronously and in case of a breakdown in any regulator, to provide the other regulators to operate without interruption while the broken regulator is repaired.
- Another object of the invention is to offer a solution of voltage regulator, the power of which can be increased and decreased by being connected in parallel for the big plants. Thereby, new companies are prevented from making a non-productive investment and expiration of the products bought without being used is prevented.
- Figure 1 illustrates the system according to the invention, which is formed by 4 regulators, as a whole.
- Figure 2 illustrates one part of the inner structure of any of the regulators according to the invention.
- Figure 3 illustrates the other part of the inner structure of any of the regulators according to the invention.
- Figure 4 illustrates the inner structure of the parallel communication management unit.
- the invention relates to a parallel and redundant voltage regulator (13) system which is used in the regulation and stabilization of AC voltage.
- the system according to the invention consists of;
- CAVS - electronic voltage regulator
- - CAVS-MB (1) which takes the thyristor (9) addresses required for voltage regulation from PCU (2) by means of the electronic circuits and software algorithm designed for closed loop parallel communication; provides these addresses to be applied to the thyristor (9) groups (with the use of CATC algorithm); provides the thyristor (9) address change process to be performed by closed loop communication with the instructions of PCU (2) and reliable and precise information; is provided to be one for each phase (preferably 3 for three phases) in each regulator (13) for the parallel operation of the regulators (13) and provides a separate control and management for each phase (L1 , L2, L3); performs TOC and TSC controls for all the thyristors (9) simultaneously, and manages the status and breakdown information by measuring the information such as input voltage, output voltage, thyristor (9) temperature, etc.;
- - PCU (2) developed for performing closed loop parallel and synchronous communication between PMU (3) and CAVS-MB (1), the management and communication unit, which provides the regulators (13) to perform an exchange of information with PRMU (12) over PMU (3): transmits the thyristor (9) addresses, which are received by CAVS-MB (1) cards provided by three on each of the regulators (13) from PMU (13), are separate for each phase but common for all the regulators (13), and the other instructions and sends the status information and application results it takes from CAVS-MB (1) cards to PMU (3); calculates the output and load voltages of each phase of the regulators (13) by means of analog information reading circuits and controls whether these values are synchronous with the common output of the parallel system; can perform parallel bidirectional communication with PMU (3) and CAVS-MBs (1) simultaneously; - management unit PRMU (12) which provides parallel redundant operation of at least 2 regulators (13); performs an exchange of information with the regulators (13) over PMU (3) provided therein; provides the entire system to run safely and synchronously;
- PMU (3) which calculates the independent thyristor (9) address information of each phase for each regulator (13) which is common for at least 2 regulators (13); sends the calculated address information to all of the regulators (13) simultaneously to provide operating safety and to meet rapid and synchronous operation needs using closed loop parallel communication electronic circuits and software algorithm; provides the regulators (13) to be connected to the parallel system by synchronizing the same therewith according to the voltage information measured from analog channels and the information received from regulators (13); controls the security of the data exchange performed between the regulator (13) and PRMU (12); and
- Inputs and outputs of at least 2 regulators (13) are short circuited.
- PMU (3) sends the stable and same thyristor (9) address to all the regulators ( 3) and after assuring that this address is applied it tests the regulators (13) and provides the parallel connections thereof respectively. After all the regulators (13) are connected in parallel, the process of increasing and decreasing the outputireage starts for maintaining the output voltage in desired limits. The process of increasing and decreasing the voltage is performed in all the regulators (13) simultaneously.
- Each regulator (13) has a structure as in Figures 2 and 3. It consists of the following parts:
- thyristor (9) groups which form semi-conductor AC switch by connecting reversely in parallel to each other and are formed by coupling at least two thyristors (9) together (thyristors (9) arranged in 2 groups can be increased in a desired number depending on input voltage range and output voltage accuracy of the regulator (13) .
- 1st thyristor (9) group and 2nd thyristor (9) group which provide selecting 25 different voltage stages, are formed by being arranged in the form of 2 groups out of the thyristors (9) provided by fives. It is also possible to form 9 different voltage stages by arranging 2 groups out of 3 pieces or 100 different voltage stages by arranging 2 groups out of 10 pieces.
- Thyristor (9) is a semi-conductor power switch which provides the current to pass between ANODE- CATHODE terminals when voltage is applied to the control terminal (gate); waits for the current, which is drawn for switching off the anode-cathode switch after the control voltage is cut, to be zero; remains in transmission as long as the anode-cathode current is not zero; and is generally used in AC voltage applications.
- regulators (13) connected in parallel, semi-conductor AC current switches obtained by connecting the two thyristors (9) reversely in parallel to each other are used. These switches are turned on and off by indicating the address by CAVS-MB (1).
- Thyristors (9) are arranged in the form of 2 groups. When a specific voltage value is intended to be applied to the booster transformer (7), 1 thyristor from the 1st group of thyristors (9) in the big voltage stages and
- 1 thyristor (9) from the 2nd group of thyristors (9) in the small voltage stages are operated. For instance, if 30V is intended to be applied to the booster transformer (7), the thyristor (9) no. 2 in the 1st group and the thyristor (9) no. 6 in the 2nd group are operated. Voltages of the thyristors (9) no.
- This electronic circuit is referred to as TOC measurement circuit.
- This circuit measures on and off state of each thyristor (9), and sends the turn-off information of the thyristors (9), to which the turn-off command is sent, and the turn-on/operation information of the thyristors (9), to which operation command is sent, to the TSD unit and CAVS-MB (1) microprocessor.
- TOC information is collected from all of the 5 TOC measurement circuits disposed in the 1st group and sent to the microprocessor which is disposed on the CAVS-MB (1) card and is the management unit of the card.
- the microprocessor Upon receiving the TOC information, the microprocessor sets the permission of operation of a new thyristor (9) for the 1st group.
- 5 TOC circuits disposed in the 2nd group operate in a simiiar way and the microprocessor is allowed to set the permission of operation of a new thyristor (9) for the 2nd group.
- the process of selecting and operating the new thyristors (9) determined according to the voltage value desired to be applied to the booster transformer (7) starts.
- Thyristor Selector Demultiplexer (TSD) circuit is designed on said CAVS-MB (1) so as to activate only one thyristor (9) out of each thyristor (9) groups simultaneously, wherein it performs the thyristor (9) selection process according to the address information determined by the microprocessor of CAVS-MB (1).
- TSD Thyristor Selector Demultiplexer
- Microprocessor writes the address of thyristor (9) that it desires to select from the 1st group in the 1st TSD and the address of thyristor (9) that it desires to select from the 2nd group in the 2nd TSD.
- the new thyristor (9) addresses are written in TSDs and the TSD output is activated, gate driver circuit of the selected thyristor (9) is operated and the thyristor (9) is activated.
- the information that the thyristor (9) is operated and the current is drawn between anode-cathode is measured by TOC circuit and sent to the microprocessor. After receiving the information that the thyristors (9) in both groups operate properly, the microprocessor completes the thyristor (9) selection process.
- This system where the next step is passed upon receiving the information that the operating thyristor (9) is turned off and upon measuring the operation of the new thyristor (9) after the address of the new thyristor (9) is written, is referred to as closed loop addressing. If the 2 thyristors (9) in the same group are turned on simultaneously in the address thyristor (9) system composed of 2 groups, the thyristors (9) will be damaged as the 2 different voltage values will be short circuited. To prevent this and operate safely, electronic circuits are used which measure the turn-off state of the thyristors (9).
- CAVS-MB (1) Closed loop addressable thyristor (9) conversion system which measures the on or off state of each thyristor (9) and switches between the thyristors (9) with this precise information provides a significant advantage in terms of the safe operation of the high power regulators (13).
- CAVS-MB (1) definitely has the information that which thyristors (9) are active in the regulator (13).
- CAVS-MB (1) has full and precise information about the situation.
- suitable thyristors (9) are operated by using the respective address in accordance with the voltage stage desired to be selected.
- 0V, 55V, 110V, 165V, 220V voltage stages to connect the 1st group of thyristors (9) and 88V, 99V, 110V, 121V, 132V stages to connect the 2nd group of thyristors (9) are provided on the transformer with stage (8).
- 3rd thyristor (9) from the 1st group and 8th thyristor (9) from the 2nd group are operated (thyristor address 38).
- OV is applied to the secondary winding of the booster transformer (7).
- OV is generated in primary windings of the booster transformer (7), and the output voltage is equal to the input voltage.
- thyristor (9) is increased by 1 and made 39.
- the voltages of the 3rd and 9th thyristors (9) are 110V and 121V, respectively, 11V is applied to the secondary winding of the booster transformer (7).
- Conversion ratio of booster transformer (7) is 1/3, 3,5V is generated in the primary winding thereof.
- Output voltage and input voltage are +3,5V, thyristor (9) address is increased until the output voltage is elevated to the set value.
- thyristor (9) address is decreased by 1. In every reduction of thyristor (9) address, output voltage decreases by 3,5V. All the address changes are performed according to the instructions received from PMU (3) by CATC protocol.
- Parallel communication connections between PMU and CAVS-MB (1) are made with the connecting connectors and parallel and synchronous communication electronic circuits specially designed for this purpose and disposed on PCU (2).
- Connectors which provide the connections between the devices and cards; multiplexer, demultiplexer, latch and line drivers where mutually received and sent information are taken and stored, are provided on PCU (2). Thereby, parallel communication is provided bi-directionally and simultaneously for three phases.
- PMU (3) comprises electronic circuits which will perform simultaneous bidirectional communication with all the regulators (13) connected in parallel.
- Parallel and communication unit and connecting connector are added to the PMU (3) unit in a number equal to the number of the regulators ( 3) to be connected in parallel.
- Parallel communication units in PMU (3) and PCU (2) are the same.
- 10 different voltage values are available on the transformer with stage (8).
- 10 thyristors (9) are arranged in a way to form 25 different voltage values by being arranged in the form of 2 groups out of the thyristors provided by fives.
- more number of voltage variations can be provided with more number of thyristors (9).
- 64 different voltage stages can be formed by using 16 thyristors (9).
- CAVS-MB (1) tests whether all the thyristors (9) are turned off and closes the 1st and 2nd TSD outputs. In this case, gate pulse is not generated for any thyristor (9).
- Microprocessor writes the addresses of the thyristors (9) to be started up in the TSD inputs. TSDs select the thyristor (9) to be operated, but as the TSD exit permissions are closed, thyristor (9) gate drivers are not operated.
- TOC information is waited to be received for the activation of the thyristors (9).
- TOC information is sent by CAVS-MB (1) circuit. A cable from Anode-Cathode and Gate terminals of each thyristor (9) is received by CAVS-MB (1).
- TOC measurement circuit disposed on the CAVS-MB (1 ) follows the voltage between the Anode-Cathode of the thyristor (9). When the voltage between the anode- cathode of the thyristor (9) is higher than 10V, it decides that the thyristor (9) is not in transmission and gives the TOC information. 10 TOC test circuits are provided on CAVS-MB (1) in a way to be provided 1 for each thyristor (9). When all the TOC test circuits yield positive results, CAVS-MB (1) turns on the TSD outputs and provides the activation of pre-selected thyristors (9).
- CATC is the electronic circuits which provide the thyristors (9) that cannot be turned on and off fully and simultaneously with the gate signal to be turned on and off with reliable and precise information in order to form different voltage variations and the algorithm where these circuits are managed.
- CATC first waits for the TOC information to come from the thyristor (9) measurement circuits. When all the thyristors (9) are turned off, TOC information is supplied. When the TOC information is received, TSD outputs are turned on and the gate circuit of the thyristor (9) selected is operated. Finally, TSC information is waited to be received from the thyristor (9) measurement circuits. This information indicates that the selected thyristor (9) is active.
- the thyristor (9) conversion process is cancelled, all the thyristors (9) are turned off and error message is given.
- thyristor transmission process is completed.
- a new thyristor (9) address calculation permission is set for PMU (3).
- CAVS-MB (1) cards disposed in the regulator (13) bring the thyristor (9) groups in their management to the initial conditions with the same algorithm.
- CAVS-MB (1) informs the PCU (2) about the provision of initial conditions and waits for the new thyristor (9) address.
- PCU (2) takes the immediate information from the CAVS-MB (1) cards, informs PMU (3) about this and waits for the new address.
- the second important component of the invention is that parallel communication uses CPC protocol with the specially designed electronic circuits and algorithms.
- CPC protocol provides a secure and fast parallel communication which protects the thyristor (9) address information calculated by PMU (3) and sent to the regulators (13) connected in parallel against electrical noise and connection errors and provides equality and precision in the received and sent information between the 4 voltage regulators (13) and PRMU (12).
- Electronic circuits are designed in the invention in a way to provide 4 regulators (13) to be connected in parallel. To provide more number of regulators (13) to be connected in parallel, the number of these electronic circuits is required to be increased.
- a total of 6 received data storage and retrieval circuits (DRL) and 6 sent data storage and transfer circuits, 3 (1 for each phase) for communicating with CAVS-MBs (1) and 3 for communicating with PMU (3), are provided on PCU (2). Thanks to the PCU (2) writing the information to be sent to CAVS-MBs (1) and PMU (3) in DSL and setting the DSO (data sent ok) signal, DRL which is disposed in each CAVS-MB (1) and PMU (3) is allowed to simultaneously receive the information sent.
- DSL data transfer and storage circuits
- DRL data retrieval and storage circuits
- DSL data transfer and storage circuit
- DRL data retrieval and storage circuit
- the information to be sent are written in the sent data latches, respectively. During this process, a separate information can also be written in each latch if required. These information are the thyristor (9) addresses or process instructions.
- the writing process is completed, all the latches are opened simultaneously and 'Data Sent Ok' (DSO) signal is sent.
- DSO 'Data Sent Ok'
- CAVS-MBs (1) and PMU (3) are allowed to simultaneously receive the information.
- 'Data Received Ok' (DRO) signal is sent.
- CAVS-MB (1) and PMU (3) write the information they will send in the sent data latch comprised therein and send the DSO signal.
- PCU (2) When PCU (2) receives the DSO signal, it reads the information in the received data latches and records the same in its memory. When the reading process is completed, it sends the DRO signal. To ensure an error-free parallel communication, information transfer protocol is repeated periodically in the following order. These steps are;
- CAVS-MB (1) determining the thyristors (9) required to be operated according to the thyristor (9) address that CAVS-MB (1) of each phase receives from PCU (2), turning off the thyristors (9) operating by using the CATC unit, and performing the thyristor (9) selection process by operating the new!y selected thyristors (9);
- each PCU (2) evaluating the error and failure codes it receives from CAVS-MB (1) cards of the regulator (13) it commands and sending a status information to PMU (3);
- CAVS-MBs (1) If the test information controlled by CAVS-MBs (1) are inaccurate, CAVS-MBs (1) sending an error code to the PCUs (2) related thereto;
- Receiving the same address information several times and comparing the sent and received addresses during the communication processes is a special algorithm which is developed for preventing activation of a different thyristor (9) than the other in any regulator (13) due to the connection errors or communication errors.
- CBI (6) is used at the output of each regulator (13) in order to prevent said loop currents.
- CBI (6) consists of inductors coupled in series to the output of each phase of the regulator (13). As the current drawn from the output of the regulator (13) increases, voltage drop on inductor also increases.
- secure and fast voltage regulator (13) system which comprises many voltage regulators (13); operates at high power and on a parallel and redundant basis, wherein the broken regulators (13) are disabled without affecting the other regulators (13) and are reactivated after being repaired without turning off the other regulators (13).
- PMU (3) calculates a separate address for each phase. Independent voltage regulation is available in the invention.
- the thyristor (9) addresses calculated independently for L1 , L2, L3 phases are sent simultaneously to all the regulators (13) connected in parallel by means of the specially designed electronic circuits and developed algorithm.
- PCU (2) in each regulator (13) applies the address and operation commands received from PMU (3), it writes the status information of the regulator (13) in the parallel communication unit and sets the DSO signal.
- PMU (3) Upon receiving the DSO signal from all the PCUs (2), PMU (3) reads the coming information from the parallel communication unit. In this manner, simultaneous and parallel communication is performed with all the regulators (13).
- Output voltage can be increased or decreased with the different voltages applied to the booster transformer (7).
- Each regulator (13) is connected to and disconnected from the parallel system in a controlled and sequential manner by PMU (3) and PCU (2).
- Parallel communication between PMU (3), PCU (2) and CAVS-MB (1) is a closed loop feedback parallel communication protocol which is designed to eliminate the communication errors likely to occur due to electrical noise such as cable breaking and loose contact of the socket and similar reasons.
- CAVS-MB (1) When a new thyristor (9) address is received by CAVS-MB (1), CAVS-MB (1) issuing a command by means of its microprocessor that TSD turn off all the thyristor (9) gate pulses;
- CAVS-MB (1) Upon receiving the TOC signal, CAVS-MB (1) sending the signal which gives the permission of driving the thyristor (9) to TSD;
- CAVS-MB Upon receiving the information that the selected thyristors (9) are turned on from the TOC circuits, CAVS-MB (1) sending the 'process completed' information to PCU (2);
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Rectifiers (AREA)
- Control Of Voltage And Current In General (AREA)
- Control Of Eletrric Generators (AREA)
- Control Of Electrical Variables (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/TR2015/000247 WO2016195606A1 (en) | 2015-06-03 | 2015-06-03 | Parallel and redundant voltage regulator system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3117282A1 true EP3117282A1 (en) | 2017-01-18 |
EP3117282B1 EP3117282B1 (en) | 2019-02-20 |
Family
ID=53682775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15739361.2A Active EP3117282B1 (en) | 2015-06-03 | 2015-06-03 | Parallel and redundant voltage regulator system |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3117282B1 (en) |
TR (1) | TR201907530T4 (en) |
WO (1) | WO2016195606A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109063288A (en) * | 2018-07-19 | 2018-12-21 | 中山大学 | A kind of city area-traffic noise profile parallel calculating method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993020497A1 (en) * | 1992-04-01 | 1993-10-14 | Pennsylvania Power & Light Company | Control system and method for the parallel operation of voltage regulators |
US20110182094A1 (en) * | 2007-08-13 | 2011-07-28 | The Powerwise Group, Inc. | System and method to manage power usage |
US7872886B2 (en) | 2008-02-20 | 2011-01-18 | Virginia Tech Intellectual Properties, Inc. | Quasi-parallel voltage regulator |
ITTO20090367A1 (en) * | 2009-05-08 | 2010-11-09 | Torino Politecnico | PROCEDURE AND STATIC CONVERSION SYSTEM FOR ADJUSTING THE POWER IN AN ELECTRIC CURRENT NETWORK |
CN102830744A (en) | 2012-09-17 | 2012-12-19 | 江苏国石半导体有限公司 | Linear voltage regulator employing frequency compensation |
-
2015
- 2015-06-03 TR TR2019/07530T patent/TR201907530T4/en unknown
- 2015-06-03 EP EP15739361.2A patent/EP3117282B1/en active Active
- 2015-06-03 WO PCT/TR2015/000247 patent/WO2016195606A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP3117282B1 (en) | 2019-02-20 |
TR201907530T4 (en) | 2019-06-21 |
WO2016195606A1 (en) | 2016-12-08 |
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