CN103840458A - Two-stage harmonic protection method for single-transformer power distribution system of hospital - Google Patents
Two-stage harmonic protection method for single-transformer power distribution system of hospital Download PDFInfo
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- CN103840458A CN103840458A CN201310710852.5A CN201310710852A CN103840458A CN 103840458 A CN103840458 A CN 103840458A CN 201310710852 A CN201310710852 A CN 201310710852A CN 103840458 A CN103840458 A CN 103840458A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The invention provides a two-stage harmonic protection method for a single-transformer power distribution system of a hospital. The system comprises two harmonic protection cabinets, and capacitance compensation cabinets and a power distribution cabinet are arranged in the middle of the system. Each harmonic protection cabinet is provided with a main harmonic protection circuit, an auxiliary harmonic protection circuit and a coordination module. Each harmonic protector is provided with a signal acquisition circuit and an inverter circuit.
Description
Technical field
The present invention relates to distribution field, be specially the two-stage type harmonic protection method of a kind of single phase transformer formula hospital distribution system.
Background technology
In the distribution system of electric power, because power distribution cabinet is for the impact of electrical network, produce harmonic current, therefore harmonic protection device often need to be set in distribution system.These protective devices can be modulated inhibition to the harmonic current producing in distribution system.But, about the layout of the distribution system in some specific fields, do not relate in the prior art.Because the controller switching equipment in specific field arranges that situation is changeable, and the configuration state of different equipment in system changes, and all will produce a very large impact the harmonic wave modulation case of whole distribution system.For example; the height difference that equipment requires for current waveform; the position of its access point difference to some extent, and itself and the correlation of harmonic protection device and the on-position of harmonic protection device itself all will exert an influence for the harmonic performance of equipment and system.
Meanwhile, because harmonic protection device often needs the abnormal operating states such as charging, maintenance in application, these states all will exert an influence for the harmonic wave modulation of whole distribution system.Do not solve pointedly for this particular problem in the prior art.
Summary of the invention
For the problems referred to above, the present invention proposes the two-stage type harmonic protection method of a kind of single phase transformer formula hospital distribution system, and it specifically proposes solution for the problems referred to above in hospital's distribution field.
The technical solution used in the present invention is:
The two-stage type harmonic protection method of a kind of single phase transformer formula hospital distribution system, described power distribution cabinet system comprises bus, the left end of bus is connected with transformer, described transformer provides electric power to bus, bus is connected with capacitor compensation cabinet on the right side of transformer, bus is connected with medical imaging devices power distribution cabinet on the right side of capacitor compensation cabinet, be connected with operating room electricity consumption power distribution cabinet on the right side of medical imaging devices power distribution cabinet, be connected with ward electricity consumption power distribution cabinet on the right side of operating room electricity consumption power distribution cabinet, right side at ward electricity consumption power distribution cabinet is connected with medical information system power distribution cabinet, the physical location of II type harmonic protection cabinet is arranged on the rightmost side of described system, wherein, described II type harmonic protection cabinet is connected with bus by waveform detection circuit, described waveform detection circuit is for obtaining the electric weight waveform of current bus, the tie point of described waveform detection circuit and bus is positioned at the right side of described capacitor compensation cabinet and bus tie point, described II type harmonic protection cabinet is also connected with outside line by waveform modulated circuit, described outside line is connected with bus by air switch, the tie point of outside line and bus is positioned at the tie point right side of waveform detection circuit and bus, described waveform modulated circuit is for exporting the modulation waveform for bus harmonic filtration, in operating room electricity consumption power distribution cabinet and ward electricity consumption power distribution cabinet, be also provided with I type harmonic protection device, at load-side filtering harmonic wave, wherein, described II type harmonic protection cabinet comprises modulation Coordination module, main harmonic protective circuit and subharmonic protective circuit, and wherein, main harmonic protective circuit, for producing anti-phase harmonic current under normal conditions, is modulated bus waveform, subharmonic protective circuit, for produce anti-phase harmonic current in the time that main harmonic protective circuit cannot normally be worked, is modulated bus waveform, modulation Coordination module is used for the operating state of Real-Time Monitoring main harmonic protective circuit and in the time that main harmonic protective circuit cannot normally be worked, enables subharmonic protective circuit, wherein, in the time that modulation Coordination module detects main harmonic protective circuit cisco unity malfunction, the waveform modulated being provided by main harmonic protective circuit is provided modulation Coordination module gradually, and correspondingly increases gradually the waveform modulated being provided by subharmonic protective circuit, thereby ensures the steady of switching, in the time that main harmonic protective circuit need to be returned to normal operating conditions, the waveform modulated being provided by subharmonic protective circuit is provided modulation Coordination module gradually, and correspondingly increases gradually the waveform modulated being provided by main harmonic protective circuit, thereby ensures the steady of switching, described I type harmonic protection device only has a harmonic protection circuit,
Described method comprises the steps:
1,, by waveform detection circuit Real-time Collection bus current data, analyze harmonic current;
2, produce anti-phase harmonic current by waveform modulated circuit, eliminate mains by harmonics.
Valuably, wherein, described harmonic protection circuit includes protector signals collecting circuit, Detecting Power Harmonics module, processing module, driver module, IGBT inverter circuit module, charging capacitor module, capacitor charging resistance, reactor and protector modulation circuit, wherein, Detecting Power Harmonics module is for by protector signals collecting circuit, modulation Coordination module given bus waveform being monitored, processor module for to Detecting Power Harmonics module monitors to signal carry out Treatment Analysis; Driver module is used for the control signal of receiving processor module and drives IGBT inverter circuit module, and IGBT inverter circuit module is for being used for the modulation waveform of bus by reactor and the output of protector modulation lines road direction modulation Coordination module; Described modulation Coordination module has the described waveform modulated circuit and the waveform detection circuit that are connected with bus; Described charging capacitor module is also the inner member power supply of harmonic protection device for stored electric energy, and capacitor charging resistance for avoiding described charging capacitor module impacted by super-high-current in the time that described charging capacitor module is charged.
It should be noted that not actual direction meaning of the term " left side " that adopts in the present invention, " right side ", it is only at the relative position relation of the various piece shown in indicator diagram.
Pass through such scheme, operating room electricity consumption power distribution cabinet ward electricity consumption power distribution cabinet, right side at ward electricity consumption power distribution cabinet is provided with medical information system power distribution cabinet, owing in distribution system, ward electricity consumption power distribution cabinet, medical information system power distribution cabinet, ward electricity consumption power distribution cabinet etc. all having been carried out to reasonable setting, and harmonic protection device is connected into distribution system suitably, make each power consumption equipment in whole system all obtain good current waveform, avoided the potential safety hazard of ward electricity consumption, operating room electricity consumption etc.; Use major-minor harmonic protection circuit simultaneously, made each harmonic protection cabinet there is double shield, for example charging, under the situation such as inefficacy, can ensure inhibition and modulation to harmonic wave, improved stability and the reliability of system operation.
Brief description of the drawings
Fig. 1 is distribution system structural representation of the present invention;
Fig. 2 is the structural representation of harmonic protection of the present invention;
Fig. 3 is the structural representation of the harmonic protection circuit of the harmonic protection in Fig. 2 of the present invention.
Embodiment
With reference to Fig. 1-3, the present invention is described in detail.
The two-stage type harmonic protection method of a kind of single phase transformer formula hospital distribution system, described power distribution cabinet system comprises bus 10, the left end of bus 10 is connected with transformer 1, described transformer 1 provides electric power to bus 10, bus is connected with capacitor compensation cabinet 3 on the right side of transformer 1, bus is connected with medical imaging devices power distribution cabinet on the right side of capacitor compensation cabinet 3, be connected with operating room electricity consumption power distribution cabinet on the right side of medical imaging devices power distribution cabinet, be connected with ward electricity consumption power distribution cabinet on the right side of operating room electricity consumption power distribution cabinet, right side at ward electricity consumption power distribution cabinet is connected with medical information system power distribution cabinet, the physical location of II type harmonic protection cabinet 7 is arranged on the rightmost side of described system, wherein, described II type harmonic protection cabinet 7 is connected with bus by waveform detection circuit 72, described waveform detection circuit 72 is for obtaining the electric weight waveform of current bus, the tie point of described waveform detection circuit 72 and bus is positioned at the right side of described capacitor compensation cabinet 3 and bus tie point, described II type harmonic protection cabinet 7 is also connected with outside line 73 by waveform modulated circuit 71, described outside line 73 is connected with bus by air switch, the tie point of outside line 73 and bus is positioned at the tie point right side of waveform detection circuit 72 and bus, described waveform modulated circuit 71 is for exporting the modulation waveform for bus harmonic filtration, in operating room electricity consumption power distribution cabinet and ward electricity consumption power distribution cabinet, be also provided with I type harmonic protection device 2, at load-side filtering harmonic wave, wherein, described II type harmonic protection cabinet 7 comprises modulation Coordination module 73, main harmonic protective circuit 74 and subharmonic protective circuit 75, and wherein, main harmonic protective circuit 74, for producing under normal conditions anti-phase harmonic current, is modulated bus waveform, subharmonic protective circuit 75, for produce anti-phase harmonic current in the time that main harmonic protective circuit 74 cannot normally be worked, is modulated bus waveform, modulation Coordination module 73 is enabled subharmonic protective circuit 75 for the operating state of Real-Time Monitoring main harmonic protective circuit 74 and in the time that main harmonic protective circuit 74 cannot normally be worked, wherein, in the time that modulation Coordination module 73 detects main harmonic protective circuit 74 cisco unity malfunction, the waveform modulated being provided by main harmonic protective circuit 74 is provided modulation Coordination module 73 gradually, and correspondingly increase gradually the waveform modulated being provided by subharmonic protective circuit 75, thereby ensure the steady of switching, in the time that main harmonic protective circuit 74 need to be returned to normal operating conditions, the waveform modulated being provided by subharmonic protective circuit 75 is provided modulation Coordination module 73 gradually, and correspondingly increase gradually the waveform modulated being provided by main harmonic protective circuit 74, thereby ensure the steady of switching, described I type harmonic protection device 2 only has a harmonic protection circuit 21,
Described method comprises the steps:
1,, by waveform detection circuit 72 Real-time Collection bus current data, analyze harmonic current;
2, produce anti-phase harmonic current by waveform modulated circuit 71, eliminate mains by harmonics.
Valuably, wherein, described harmonic protection circuit 74, 75, 21 include protector signals collecting circuit 741, Detecting Power Harmonics module 744, processing module 745, driver module 746, IGBT inverter circuit module 747, charging capacitor module 748, capacitor charging resistance 749, reactor 743 and protector modulation circuit 742, wherein, Detecting Power Harmonics module 744 is for monitoring the given bus waveform of modulation Coordination module 73 by protector signals collecting circuit 741, processor module 745 carries out Treatment Analysis for the signal that Detecting Power Harmonics module 744 is monitored, driver module 746 is for the control signal of receiving processor module 745 and drive IGBT inverter circuit module 747, IGBT inverter circuit module 747 for by reactor 743 and protector modulation circuit 742 to 73 outputs of modulation Coordination module the modulation waveform for bus, described modulation Coordination module 73 has the described waveform modulated circuit 71 and the waveform detection circuit 72 that are connected with bus, described charging capacitor module 748 is also the inner member power supply of harmonic protection device 74,75 for stored electric energy, and capacitor charging resistance 749 for avoiding described charging capacitor module 748 impacted by super-high-current in the time that described charging capacitor module 748 is charged.
Claims (2)
1. the two-stage type harmonic protection method of a single phase transformer formula hospital distribution system, described power distribution cabinet system comprises bus (10), the left end of bus (10) is connected with transformer (1), described transformer (1) provides electric power to bus (10), bus is connected with capacitor compensation cabinet (3) on the right side of transformer (1), bus is connected with medical imaging devices power distribution cabinet on the right side of capacitor compensation cabinet (3), be connected with operating room electricity consumption power distribution cabinet on the right side of medical imaging devices power distribution cabinet, be connected with ward electricity consumption power distribution cabinet on the right side of operating room electricity consumption power distribution cabinet, right side at ward electricity consumption power distribution cabinet is connected with medical information system power distribution cabinet, the physical location of II type harmonic protection cabinet (7) is arranged on the rightmost side of described system, wherein, described II type harmonic protection cabinet (7) is connected with bus by waveform detection circuit (72), described waveform detection circuit (72) is for obtaining the electric weight waveform of current bus, the tie point of described waveform detection circuit (72) and bus is positioned at the right side of described capacitor compensation cabinet (3) and bus tie point, described II type harmonic protection cabinet (7) is also connected with outside line (73) by waveform modulated circuit (71), described outside line (73) is connected with bus by air switch, the tie point of outside line (73) and bus is positioned at the tie point right side of waveform detection circuit (72) and bus, described waveform modulated circuit (71) is for exporting the modulation waveform for bus harmonic filtration, in operating room electricity consumption power distribution cabinet and ward electricity consumption power distribution cabinet, be also provided with I type harmonic protection device (2), at load-side filtering harmonic wave, wherein, described II type harmonic protection cabinet (7) comprises modulation Coordination module (73), main harmonic protective circuit (74) and subharmonic protective circuit (75), wherein, main harmonic protective circuit (74), for producing under normal conditions anti-phase harmonic current, is modulated bus waveform, subharmonic protective circuit (75), for produce anti-phase harmonic current in the time that main harmonic protective circuit (74) cannot normally be worked, is modulated bus waveform, modulation Coordination module (73) is enabled subharmonic protective circuit (75) for the operating state of Real-Time Monitoring main harmonic protective circuit (74) and in the time that main harmonic protective circuit (74) cannot normally be worked, wherein, in the time that modulation Coordination module (73) detects main harmonic protective circuit (74) cisco unity malfunction, the waveform modulated being provided by main harmonic protective circuit (74) is provided modulation Coordination module (73) gradually, and correspondingly increase gradually the waveform modulated being provided by subharmonic protective circuit (75), thereby ensure the steady of switching, in the time that main harmonic protective circuit (74) need to be returned to normal operating conditions, the waveform modulated being provided by subharmonic protective circuit (75) is provided modulation Coordination module (73) gradually, and correspondingly increase gradually the waveform modulated being provided by main harmonic protective circuit (74), thereby ensure the steady of switching, described I type harmonic protection device (2) only has a harmonic protection circuit (21),
Described method comprises the steps:
1), pass through waveform detection circuit (72) Real-time Collection bus current data, analysis harmonic current;
2), produce anti-phase harmonic current by waveform modulated circuit (71), elimination mains by harmonics.
2. the two-stage type harmonic protection method of a kind of single phase transformer formula as claimed in claim 1 hospital distribution system, wherein, described harmonic protection circuit (74, 75, 21) include protector signals collecting circuit (741), Detecting Power Harmonics module (744), processing module (745), driver module (746), IGBT inverter circuit module (747), charging capacitor module (748), capacitor charging resistance (749), reactor (743) and protector modulation circuit (742), wherein, Detecting Power Harmonics module (744) is for monitoring the given bus waveform of modulation Coordination module (73) by protector signals collecting circuit (741), processor module (745) carries out Treatment Analysis for the signal that Detecting Power Harmonics module (744) is monitored, driver module (746) is for the control signal of receiving processor module (745) and drive IGBT inverter circuit module (747), and IGBT inverter circuit module (747) is for being used for the modulation waveform of bus to modulation Coordination module (73) output by reactor (743) and protector modulation circuit (742), described modulation Coordination module (73) has the described waveform modulated circuit (71) and the waveform detection circuit (72) that are connected with bus, described charging capacitor module (748) is also the inner member power supply of harmonic protection device (74,75) for stored electric energy, and capacitor charging resistance (749) for avoiding described charging capacitor module (748) impacted by super-high-current in the time that described charging capacitor module (748) is charged.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0715879A (en) * | 1993-06-28 | 1995-01-17 | Sansha Electric Mfg Co Ltd | Generator system |
| CN2775910Y (en) * | 2005-02-23 | 2006-04-26 | 深圳市三和电力科技有限公司 | High voltage reactive automatic compensator |
| CN101064479A (en) * | 2007-01-11 | 2007-10-31 | 西安交通大学 | Superposition principle based programmable harmonic voltage source for large power test |
| CN102158100A (en) * | 2011-03-01 | 2011-08-17 | 山东沃森电源设备有限公司 | Triphase variable-frequency power supply with high power and operating method thereof |
-
2013
- 2013-12-16 CN CN201310710852.5A patent/CN103840458B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0715879A (en) * | 1993-06-28 | 1995-01-17 | Sansha Electric Mfg Co Ltd | Generator system |
| CN2775910Y (en) * | 2005-02-23 | 2006-04-26 | 深圳市三和电力科技有限公司 | High voltage reactive automatic compensator |
| CN101064479A (en) * | 2007-01-11 | 2007-10-31 | 西安交通大学 | Superposition principle based programmable harmonic voltage source for large power test |
| CN102158100A (en) * | 2011-03-01 | 2011-08-17 | 山东沃森电源设备有限公司 | Triphase variable-frequency power supply with high power and operating method thereof |
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