CN206422538U - Three-phase load unbalance self-checking device - Google Patents
Three-phase load unbalance self-checking device Download PDFInfo
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- CN206422538U CN206422538U CN201720041979.6U CN201720041979U CN206422538U CN 206422538 U CN206422538 U CN 206422538U CN 201720041979 U CN201720041979 U CN 201720041979U CN 206422538 U CN206422538 U CN 206422538U
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- load unbalance
- checking device
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The utility model belongs to low-voltage network apparatus field, discloses a kind of three-phase load unbalance self-checking device, including controller, and the controller input is connected by bus with three-phase electricity instrument, three-phase electricity instrument parallel connection access power network；The output end of controller first is connected with permanent magnetic vacuum switch, and the output end of controller second is connected with SVG static passive compensation devices, thyristor switchable capacitor and electric-power filter respectively by bus；The permanent magnetic vacuum switch and electric-power filter are in parallel respectively to access power network, and control end and the magnetic latching relay of permanent magnetic vacuum switch access relay drive circuit after being in series.The dynamic compensation of reactive power and capacity current in power network can be realized by the three-phase load unbalance self-checking device rationally designed, intelligentized control method is realized in adjustment for three-phase load unbalance, and without manual operation, the regulating effect that this device is realized is good, safe, stability is strong.
Description
Technical field
The utility model belongs to low-voltage network apparatus field, more particularly to a kind of three-phase load unbalance automatically adjusts dress
Put.
Background technology
The power supply mode of three-phase four-wire system is mainly used in China's power distribution network, distribution transformer is generally wiring.Ideal situation
Under, three-phase load is balanced arrangement transformer symmetrical operation, can be in fact, user terminal has substantial amounts of impact load, example
Such as electric locomotive, rolling mill, ac arc furnace and large-scale semiconductor convertor device, because they have unbalanced punching
It is hitting property, non-linear and use electrical characteristics, it can not only cause flickering, three-phase imbalance and voltage pulsation, and can be in power system
The middle substantial amounts of higher hamonic wave of injection, these factors inevitably result in distribution transformer three-phase load and are in asymmetrical state.Three-phase
Load unbalanced will be produced to distribution network has a strong impact on：Line loss can be increased, increase the active loss of transformer, make distribution
Transformer station high-voltage side bus temperature is raised, and reduces distribution transformer power, is influenceed output power of motor and is raised winding temperature, produces
Neutral point voltage is offset, and causes three-phase voltage asymmetry, consumer electronics can be burnt when serious, therefore timely and effectively carry out three-phase
Uncompensated load balanced functions and reactive power compensation are very important.
The measure of traditional regulation three-phase load unbalance is artificial to power network progress commutation, manual switching capacitor, people
For increase load etc., although the phenomenon of three-phase load unbalance can be alleviated, but had little effect, and timely and effectively it can not be adjusted
Section, causes damage to low voltage electric network and electrical equipment.
Utility model content
The three-phase load unbalance occurred in low-voltage network is automatically adjusted in order to realize, it is idle in compensation power network
Power and power factor, while filtering out the higher hamonic wave produced in power network, improve the quality of power supply, the utility model discloses one kind
Three-phase load unbalance self-checking device.
In order to make it easy to understand, the part noun occurred in the utility model makees explanation explained below：
SVG static passive compensation devices：English full name is Static Var Generator, and static reacance generator is right
In the compensation of three-phase load, the reactive power primarily directed to power consumer terminal is compensated, and improves the power factor of user；
Thyristor switchable capacitor：English full name is Thyristor Switched Capacitor, referred to as TSC；
IGBT：Insulated gate bipolar transistor, category can turn off power electronic devices.
To achieve these goals, the utility model uses following technical scheme：
A kind of three-phase load unbalance self-checking device, including controller, the controller input by bus with
Three-phase electricity instrument is connected, three-phase electricity instrument parallel connection access power network；The output end of controller first is connected with permanent magnetic vacuum switch, control
The output end of device second processed by bus respectively with SVG static passive compensation devices, thyristor switchable capacitor and electric-power filter
It is connected；The permanent magnetic vacuum switch and electric-power filter are in parallel respectively to access power network, the control end and magnetic of permanent magnetic vacuum switch
Guard relay accesses relay drive circuit after being in series.
Preferably, the power network includes three-phase three-wire system or three-phase four-wire low-voltage distribution line.
Preferably, the SVG static passive compensation devices include SVG static reactive circuits, thyristor series capacitor
Device includes capacitor switching circuit.
Preferably, the relay drive circuit is connected with SVG static passive compensation devices.
Preferably, the SVG static reactives circuit is included from commutation bridge circuit, it is described from commutation bridge circuit by
6 groups can turn off power electronic devices IGBT compositions, and every group of IGBT is 2, and every group of 2 IGBT carries out inverse parallel connection, changes certainly
Phase bridge circuit is connected in parallel on power network by reactor；
The capacitor switching circuit includes phase splitter, and the phase splitter is three-phase circuit, brilliant by 1 group per circuitry phase
Brake tube is constituted, and every group of IGCT carries out inverse parallel connection for 2 IGCTs of 2, every group, the parallel connection access electricity per circuitry phase
Net.
Preferably, the bus uses RS485 buses.
Compared with prior art, the beneficial effects of the utility model are：
1. the utility model uses composite switch, operating passing zero and frequent switching to capacitor can be achieved；Cost compared with
Low, the small, floor space of loss is small；It is suitable for that power factor is low, load change is slow, possess the field of large-scale inductive load
Institute, has very important effect to improving the quality of power supply, with capacity is big, resistance to electric temperature capacity is strong, without conduction loss, drives
Simply, without radiating and being cheap the advantages of；
2. by electric current, voltage, active power and reactive power in three-phase electricity instrument real-time monitoring system and power because
The parameters such as number, control system is fed back to by the parameter information collected in time, and automatically, reasonable control SVG static reactives
The collocation of device and thyristor switchable capacitor is used, and controls the compensation situation to power network, can be while compensating three-phase unbalance electricity
Flow and idle, realize that continuous, dynamic is compensated, optimize the quality of power supply；
3. use electric-power filter, it is possible to achieve harmonics restraint, compensating reactive power to power network can be to different sizes and frequency
The harmonic wave of rate carries out quick tracing compensation, and fast response time, offsets phase induced current in load, realizes dynamic tracking and mends
Repay, and can not only mend harmonic wave but also mend idle and imbalance, with SVG static passive compensation devices and thyristor switchable capacitor knot
Conjunction is used, and can more improve the quality of electric energy, and the stability and reliability than compensation device is used alone are higher.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model three-phase load unbalance self-checking device.
Fig. 2 is the SVG static passive compensation devices and brilliant lock of the utility model three-phase load unbalance self-checking device
Pipe switched capacitor cooperating structure chart.
Fig. 3 is the adjustment state flow chart of the utility model three-phase load unbalance self-checking device operationally.
In accompanying drawing marked as：1 is controller, and 2 be three-phase electricity instrument, and 3 be permanent magnetic vacuum switch, and 4 be SVG static var compensations
Circuit is repaid, 5 be TSC switching circuits, and 6 be electric-power filter, and 7 be IGCT.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further details.
As shown in Figure 1-2, the utility model three-phase load unbalance self-checking device, is installed on low-voltage distribution on the net,
A kind of three-phase load unbalance self-checking device, including controller 1, the input of controller 1 pass through RS485 buses and three
Phase electricity instrument 2 is connected, the access three-phase three-wire system in parallel of three-phase electricity instrument 2 or three-phase four-wire low-voltage distribution line；
The output end of controller 1 first is connected with permanent magnetic vacuum switch 3, and permanent magnetic vacuum switch 3 is accessed in parallel
Three-phase three-wire system or three-phase four-wire low-voltage distribution line, control end and the magnetic latching relay of permanent magnetic vacuum switch 3 are in series
After access relay drive circuit, relay drive circuit is connected with SVG static passive compensation devices.
The output end of controller 1 second by RS485 buses respectively with SVG static passive compensation devices, TSC and electric filtering
Device 6 is connected；SVG static passive compensation devices and TSC, including SVG static reactives circuit 4 and TSC switchings circuit 5；Electricity
Force filter 6 accesses power network in parallel respectively；SVG static reactives circuit 4 includes, from commutation bridge circuit, passing through
Reactor is connected in parallel on power network, and can turn off power electronic devices IGBT by 6 groups from commutation bridge circuit constitutes, and every group is 2 anti-
The IGBT being connected in parallel；TSC switchings circuit 5 includes phase splitter, and phase splitter is three-phase circuit, per circuitry phase by 1 group of brilliant lock
Pipe 7 is constituted, and every group of IGCT 7 carries out inverse parallel connection for 2 IGCTs 7 of 2, every group, passes through reactor per circuitry phase
Parallel connection access three-phase three-wire system or three-phase four-wire low-voltage distribution line.
As a kind of enforceable mode, the main control chip of the controller 1 in the present embodiment is ARM7, is responsible for three-phase voltage
And the reception of current parameters, and calculate the electric capacity and reactive power of required switching；There are 12 AD, Ke Yijie inside ARM7
Receive and handle three-phase electricity instrument 2 transmission parameter, 2 communication ports, 1 be used for control vacuum switch, in addition 1 be used for 485
Communication, is responsible for completing the switching of capacitor.
As shown in figure 3, the adjustment state operationally of the utility model three-phase load unbalance self-checking device is such as
Under：
Three-phase electricity instrument 2 monitors voltage, electric current, power factor and reactive power in power network in real time, and three-phase electricity instrument 2 is shown
The virtual value of the voltage, electric current, power factor and the reactive power that real-time monitor, the communication interface and RS485 of three-phase electricity instrument 2
Bus is connected, and each parameter value monitored is sent into controller；
Situation of the controller 1 in monitoring power network is calculated the reactive power required supplementation with, and drawing needs to send
To the reactive power of power network, vacuum switch drive signal causes permanent magnetic vacuum switch 3 to close, connected with magnetic latching relay, after
Electrical apparatus driving circuit is closed, and control SVG static passive compensation devices 4 convey corresponding reactive power compensation into power network；
Controller 1 is drawn according to the Current calculation measured needs the capacitor of switching, sends capacitor switching signal extremely
TSC, is put into the capacitor of respective volume in power network by TSC switchings circuit 5, while controller 1 sends a signal to electric power
Wave filter 6, makes it access the higher hamonic wave occurred in power network, filtering appts.
The characteristics of three-phase load unbalance self-checking device described in the utility model has versatility, the installation of device
Shi Wuxu understands load character and degree of unbalancedness, and the capacity of adjusting means is determined according to the actual conditions of load；In addition,
Device described in the utility model is arranged in three-phase three-wire system or three-phase four-wire circuit, and with the output end of distribution transformer
It is connected, the controller of three-phase load unbalance self-checking device can be according to the parameter of three-phase electricity instrument auto-real-time monitoring
Value, the automatic active power and reactive power for calculating three-phase is simple in construction according to the size automatic switching of degree of unbalancedness, installs
Convenient, temperature rise is low during work, the characteristics of being lost low.
It is described above, only it is preferred embodiment of the present utility model, not technical scope of the present utility model is made
Go out any limitation, thus it is every any trickle amendment made according to technical spirit of the present utility model to above example, equivalent
Change and modification, in the range of still falling within the technical solution of the utility model.
Claims (6)
1. a kind of three-phase load unbalance self-checking device, including controller, it is characterised in that the controller input leads to
Cross bus to be connected with three-phase electricity instrument, three-phase electricity instrument parallel connection access power network；The output end of controller first and permanent magnetic vacuum switch
Be connected, the output end of controller second by bus respectively with SVG static passive compensation devices, thyristor switchable capacitor and electricity
Force filter is connected；The permanent magnetic vacuum switch and electric-power filter are in parallel respectively to access power network, the control of permanent magnetic vacuum switch
Relay drive circuit is accessed in end processed after being in series with magnetic latching relay.
2. three-phase load unbalance self-checking device according to claim 1, it is characterised in that the power network includes three
Three-phase three-wire system or three-phase four-wire low-voltage distribution line.
3. three-phase load unbalance self-checking device according to claim 1, it is characterised in that the static nothings of SVG
Reactive power compensation installations include SVG static reactive circuits, and thyristor switchable capacitor includes capacitor switching circuit.
4. three-phase load unbalance self-checking device according to claim 1, it is characterised in that the relay driving
Circuit is connected with SVG static passive compensation devices.
5. three-phase load unbalance self-checking device according to claim 3, it is characterised in that
The SVG static reactives circuit is included from commutation bridge circuit, described to turn off electricity by 6 groups from commutation bridge circuit
Power electronic device IGBT is constituted, and every group of IGBT is 2, and every group of 2 IGBT carries out inverse parallel connection, from commutation bridge circuit warp
Reactor is crossed to be connected in parallel on power network；
The capacitor switching circuit includes phase splitter, and the phase splitter is three-phase circuit, per circuitry phase by 1 group of IGCT
Composition, every group of IGCT carries out inverse parallel connection for 2 IGCTs of 2, every group, the parallel connection access power network per circuitry phase.
6. three-phase load unbalance self-checking device according to claim 1, it is characterised in that the bus is used
RS485 buses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720041979.6U CN206422538U (en) | 2017-01-14 | 2017-01-14 | Three-phase load unbalance self-checking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720041979.6U CN206422538U (en) | 2017-01-14 | 2017-01-14 | Three-phase load unbalance self-checking device |
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| Publication Number | Publication Date |
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| CN206422538U true CN206422538U (en) | 2017-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720041979.6U Active CN206422538U (en) | 2017-01-14 | 2017-01-14 | Three-phase load unbalance self-checking device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394801A (en) * | 2017-09-06 | 2017-11-24 | 国网安徽省电力公司宣城供电公司 | A kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device |
| CN107689633A (en) * | 2017-10-12 | 2018-02-13 | 哈尔滨理工大学 | Low voltage three-phase imbalance adjustment equipment and its electric power system |
| CN107966613A (en) * | 2017-12-26 | 2018-04-27 | 国家电网公司 | The special phase changer of direct-current resistance tester for transformer and phase change method |
| CN108206530A (en) * | 2018-03-02 | 2018-06-26 | 国网江苏省电力有限公司宜兴市供电分公司 | A kind of load control method, apparatus and system with no-power compensation function |
| CN108767881A (en) * | 2018-07-05 | 2018-11-06 | 北京中电泰瑞科技有限公司 | The comprehensive treatment device and method of power distribution network three-phase load unbalance |
| CN109524966A (en) * | 2019-01-04 | 2019-03-26 | 江苏谷峰电力科技股份有限公司 | A kind of New Fusion microgrid filter benefit device |
| CN111224412A (en) * | 2018-11-23 | 2020-06-02 | 中车唐山机车车辆有限公司 | Micro-rail traffic power supply system, balancing device and control method thereof |
| CN113054673A (en) * | 2021-03-17 | 2021-06-29 | 浙江双成电气有限公司 | Unbalanced three-phase commutation switch |
| CN113809881A (en) * | 2020-06-15 | 2021-12-17 | 北京机械设备研究所 | Voltage-stabilizing permanent magnet generator set device and voltage-stabilizing control method |
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- 2017-01-14 CN CN201720041979.6U patent/CN206422538U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394801A (en) * | 2017-09-06 | 2017-11-24 | 国网安徽省电力公司宣城供电公司 | A kind of taiwan area based on the level SVG of three-phase four-wire system three becomes out-of-balance current controlling device |
| CN107394801B (en) * | 2017-09-06 | 2024-04-02 | 国网安徽省电力公司宣城供电公司 | Station transformer unbalance current treatment device based on three-phase four-wire system three-level SVG |
| CN107689633A (en) * | 2017-10-12 | 2018-02-13 | 哈尔滨理工大学 | Low voltage three-phase imbalance adjustment equipment and its electric power system |
| CN107966613B (en) * | 2017-12-26 | 2020-02-07 | 国家电网公司 | Special phase converter for transformer direct-current resistance tester and phase conversion method |
| CN107966613A (en) * | 2017-12-26 | 2018-04-27 | 国家电网公司 | The special phase changer of direct-current resistance tester for transformer and phase change method |
| CN108206530A (en) * | 2018-03-02 | 2018-06-26 | 国网江苏省电力有限公司宜兴市供电分公司 | A kind of load control method, apparatus and system with no-power compensation function |
| CN108767881A (en) * | 2018-07-05 | 2018-11-06 | 北京中电泰瑞科技有限公司 | The comprehensive treatment device and method of power distribution network three-phase load unbalance |
| CN111224412A (en) * | 2018-11-23 | 2020-06-02 | 中车唐山机车车辆有限公司 | Micro-rail traffic power supply system, balancing device and control method thereof |
| CN109524966A (en) * | 2019-01-04 | 2019-03-26 | 江苏谷峰电力科技股份有限公司 | A kind of New Fusion microgrid filter benefit device |
| CN113809881A (en) * | 2020-06-15 | 2021-12-17 | 北京机械设备研究所 | Voltage-stabilizing permanent magnet generator set device and voltage-stabilizing control method |
| CN113809881B (en) * | 2020-06-15 | 2022-11-29 | 北京机械设备研究所 | Voltage stabilization permanent magnet generator set device and voltage stabilization control method |
| CN113054673A (en) * | 2021-03-17 | 2021-06-29 | 浙江双成电气有限公司 | Unbalanced three-phase commutation switch |
| CN113054673B (en) * | 2021-03-17 | 2022-05-20 | 浙江双成电气有限公司 | Unbalanced three-phase commutation switch |
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