CN109617108A - Chain type energy consumption device and control method thereof - Google Patents
Chain type energy consumption device and control method thereof Download PDFInfo
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- CN109617108A CN109617108A CN201811397272.4A CN201811397272A CN109617108A CN 109617108 A CN109617108 A CN 109617108A CN 201811397272 A CN201811397272 A CN 201811397272A CN 109617108 A CN109617108 A CN 109617108A
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- energy consumption
- energy
- power semiconductor
- chain type
- submodule
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
- H02J2003/365—Reducing harmonics or oscillations in HVDC
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a chain type energy consumption device, which consists of an energy consumption branch circuit and an energy consumption resistor, wherein the energy consumption branch circuit is formed by connecting at least one energy consumption submodule in series in the same direction, and the head end of the series connection is connected with a high-potential electrode of a direct current circuit; the energy consumption sub-module is composed of a first power semiconductor switch device, a diode and a direct current capacitor; the invention also comprises a control method of the chained energy dissipation device, when the voltage of the direct current line is increased, the direct current voltage control can be realized by sequentially switching on or off the power semiconductor switching devices in the energy dissipation submodule, the flexible input and flexible exit of the energy dissipation resistor are realized, the cost performance of the device is high, the reliability is high, and the device is easy to realize.
Description
Technical field
The invention belongs to High Power Electronic Converter Technology fields, and in particular to a kind of chain type energy-consuming device and controlling party
Method.
Background technique
In HVDC transmission system, chain type energy-consuming device is vital equipment.Chain type energy-consuming device is mainly answered
For the application scenarios of island power supply, if power generation end is the inertia power supply similar with wind-powered electricity generation, when receiving end breaks down, by
It can not be sent out in power, the voltage of DC power transmission line will be caused to increase, the safe operation to equipment in DC side cumlative energy
It causes damages.
In the prior art, the method for use is that power semiconductor is directly connected, and when DC voltage is excessively high, is passed through
The control of power electronic devices puts into resistance, and the investment of resistance will be such that DC voltage declines, when the energy consumption speed of resistance is more than straight
The speed of side cumlative energy is flowed, DC voltage will decline, at this point, going to shutdown conductive discharge circuit again, DC voltage rises again,
Repeatedly turn on and off resistance branch, form the effect of Hysteresis control, the problem of this method is primarily present is: turning off
When, since multiple power semiconductor switches simultaneously turn off it is difficult to ensure that consistency related will be led once shutdown is asynchronous
Lead to the fast device of slow device or shutdown to bear overvoltage and damage；And the state switching that turns on and off of high speed also results in
Very big voltage and current change rate is generated, to generate magnetic interference.In addition, each submodule includes number in the prior art
Measure more power semiconductor, higher cost.
Summary of the invention
To solve the above-mentioned problems, the invention proposes a kind of chain type energy-consuming device and the controlling parties of use above-mentioned apparatus
Method, device are attached between DC electrode, can be by sequentially turning on or turning off energy consumption when AC line voltage increases
Power semiconductor switch in module realizes DC voltage control, realizes that energy consumption resistor flexibility investment and flexibility exit, keeps away
Exempt to generate impact.
In order to achieve the above objectives, the specific scheme that the present invention uses is as follows:
A kind of chain type energy-consuming device, described device are made of energy consumption branch with energy consumption resistor, and the energy consumption branch routing is at least
The equidirectional series connection of one energy consumption submodule is constituted, and the head end of the series connection and the high-potential electrode of DC line connect
It connects；The energy consumption resistor centralized arrangement and energy consumption branch are connected in series, and one end of energy consumption resistor is connect with the tail end of energy consumption branch,
The connection of the low-potential electrode of the other end and DC line；The energy consumption submodule is by the first power semiconductor switch, two poles
Pipe is constituted with DC capacitor, wherein the first power semiconductor switch is connect with Diode series, connection type has following two
Kind:
Connection type 1: the cathode of diode and the anode of DC capacitor connect, and the anode of diode is partly led with the first power
The collector of body switching device connects, and the emitter of the first power semiconductor and the cathode of DC capacitor connect；
2: the first power semiconductor switch collector of connection type is connect with DC capacitor anode, and the first power is partly led
The connection of the cathode of body switching device emitter and diode, the anode of diode and the cathode of DC capacitor connect；
The collector of first power semiconductor switch is as positive leading point, and emitter is as cathode leading point.
Wherein, diode also one the second power semiconductor switch of reverse parallel connection in the energy consumption submodule.
Wherein, an energy consumption resistor voltage clamping unit being made of diode also in parallel.
Wherein, an energy consumption submodule by-pass switch also in parallel.
Wherein, the energy consumption branch of the chain type energy-consuming device is also connected at least one charhing unit, the charhing unit by
Charging resistor and charge switch parallel connection are constituted.
Wherein, the chain type energy-consuming device is also connected at least one cutoff switch.
Wherein, the energy consumption resistor can be replaced accumulator, and the accumulator has charging and discharging capabilities.
Wherein, the energy consumption submodule can also only include mechanical switch.
The invention also includes a kind of control method of chain type energy-consuming device,
(1) when device starts, described method includes following steps:
Step 1: the power semiconductor switch shutdown in the energy consumption submodule, the charge switch separate, partition
Switch separates；
Step 2: after DC line electrification, being closed cutoff switch, pass through direct current of the charging resistor into energy consumption submodule
Capacity charge；
Step 3: after the completion of to be charged, being closed charge switch, charging resistor is bypassed.
(2) when device detects DC line over-voltage, described method includes following steps:
Step 1: described device real-time detection AC line voltage, when AC line voltage is not above upper limit value Umax
When, which is in standby mode；
Step 2: when AC line voltage is more than upper limit value Umax, described device is in energy consumption mode, is transferred to step 3；
Step 3: sequentially turning on the first power semiconductor in energy consumption submodule, the conduction interval time is t；
Step 4: after all first power semiconductors are both turned on, maintaining the state for time length is T1；
Step 5: detection AC line voltage, when AC line voltage is lower than lower limit value Umin, successively shutdown energy consumption is sub
The first power semiconductor in module, the time that holds off interval are t3；
Step 6: after all first power semiconductors are turned off, maintaining the state for time length is T2；
Step 7: under energy consumption mode, once detecting that energy consumption submodule voltage exceeds maximum tolerance value, the being connected immediately
One power semiconductor.
Beneficial effects of the present invention:
1, the buffering of energy consumption submodule DC capacitor is utilized in apparatus of the present invention, system and method, sequentially turns on or turns off
Consume energy submodule in power semiconductor switch, realize DC voltage control, realize energy consumption resistor flexibility investment and it is soft
Property exit, avoid the problem for the voltage unevenness that direct concatenated power semiconductor switch may cause when off, greatly
The risk of power semiconductor switch shutdown over-voltage is reduced greatly.
2, energy consumption submodule uses modular mode in the present invention, is readily produced manufacture.Submodule parallel connection of consuming energy bypasses
Switch, in module failure, can rapidly bypass malfunctioning module, can there are certain abundant in submodule configuration quantity
Amount, greatly improves the operational reliability of device.
3, resistance centralized arrangement is conducive to the design of cooling system, is conducive to be managed collectively and be monitored.It is modular
The branch that consumes energy combines the resistance of centralization, keeps the cost performance of whole device optimal, engineering construction difficulty is small.
4, each energy consumption submodule of the present invention only includes a power semiconductor and a diode, with the prior art
It compares, takes full advantage of the characteristic of device, eliminate unnecessary device, greatly reduced the cost and volume of device.
Detailed description of the invention
Fig. 1 is the topology diagram of chain type energy-consuming device of the present invention.
Fig. 2 is the second embodiment of energy consumption submodule of the invention.
Fig. 3 is chain type energy-consuming device control method control sequential figure of the present invention.
Figure label title: 1, consume energy branch；2, consume energy submodule；3, energy consumption resistor；4, by-pass switch；5, charging electricity
Resistance；6, charge switch；7, cutoff switch；8, voltage clamping unit.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
In order to achieve the above objectives, the specific scheme that the present invention uses is as follows:
As shown in Figure 1, a kind of chain type energy-consuming device, described device are made of energy consumption branch 1 and energy consumption resistor 3, the consumption
Can branch route at least one energy consumption equidirectional seriess connection of submodule 2 composition, the head end of the series connection and DC line
High-potential electrode connection；The energy consumption resistor centralized arrangement and energy consumption branch are connected in series, one end of energy consumption resistor and energy consumption branch
The tail end on road connects, and the low-potential electrode of the other end and DC line connects；The energy consumption submodule is by the first power semiconductor
Switching device, diode and DC capacitor are constituted, wherein the first power semiconductor switch is connect with Diode series, connection
Mode has following two:
Connection type 1: the cathode of diode and the anode of DC capacitor connect, and the anode of diode is partly led with the first power
The collector of body switching device connects, and the emitter of the first power semiconductor and the cathode of DC capacitor connect；
2: the first power semiconductor switch collector of connection type is connect with DC capacitor anode, and the first power is partly led
The connection of the cathode of body switching device emitter and diode, the anode of diode and the cathode of DC capacitor connect；
The collector of first power semiconductor switch is as positive leading point, and emitter is as cathode leading point.
As shown in Fig. 2, diode also one the second power semiconductor switch device of reverse parallel connection in the energy consumption submodule
Part.
Wherein, an energy consumption resistor voltage clamping unit 8 being made of diode also in parallel.
Wherein, an energy consumption submodule by-pass switch 4 also in parallel.
Wherein, the energy consumption branch of the chain type energy-consuming device is also connected at least one charhing unit, the charhing unit by
Charging resistor 5 and the composition in parallel of charge switch 6.
Wherein, the chain type energy-consuming device is also connected at least one cutoff switch 7.
Wherein, the energy consumption resistor can be replaced accumulator, and the accumulator has charging and discharging capabilities.
Wherein, the energy consumption submodule can also only include mechanical switch.
The invention also includes a kind of control method of chain type energy-consuming device,
(1) when device starts, described method includes following steps:
Step 1: the power semiconductor switch shutdown in the energy consumption submodule, the charge switch separate, partition
Switch separates；
Step 2: after DC line electrification, being closed cutoff switch, pass through direct current of the charging resistor into energy consumption submodule
Capacity charge；
Step 3: after the completion of to be charged, being closed charge switch, charging resistor is bypassed.
(2) when device detects DC line over-voltage, described method includes following steps:
Step 1: described device real-time detection AC line voltage, when AC line voltage is not above upper limit value Umax
When, which is in standby mode；
Step 2: when AC line voltage is more than upper limit value Umax, described device is in energy consumption mode, is transferred to step 3；
Step 3: sequentially turning on the first power semiconductor in energy consumption submodule, the conduction interval time is t；
Step 4: after all first power semiconductors are both turned on, maintaining the state for time length is T1；
Step 5: detection AC line voltage, when AC line voltage is lower than lower limit value Umin, successively shutdown energy consumption is sub
The first power semiconductor in module, the time that holds off interval are t3；
Step 6: after all first power semiconductors are turned off, maintaining the state for time length is T2；
Step 7: under energy consumption mode, once detecting that energy consumption submodule voltage exceeds maximum tolerance value, the being connected immediately
One power semiconductor.
Reference specific embodiment illustrates chain type energy-consuming device application of the present invention:
In the present embodiment, device is connected in the DC line of 200kV, altogether includes 100 energy consumption submodules, when standby shape
When state, 100 energy consumption submodules divide equally 200kV voltage, when DC voltage is more than Umax=230kV, into energy consumption mode, according to
The second power semiconductor in secondary conducting energy consumption submodule, at this point, the conduction interval time is t, in the present embodiment, t=
5us, since interval time is very short and buffer function of capacitor, the submodule voltage that remaining is not turned on is constant, in transient state feelings
Under condition, the voltage for being applied to resistance is gradually risen, and is born voltage after bypassing first module, on resistance and is increased V1, Zhi Daosuo
There is submodule to be all bypassed, voltage is born on resistance and reaches maximum value VN, the ability to consume energy at this time reaches maximum.
It holds time as T1, DC voltage is lower than Umin=210kV at this time, successively the second function in shutdown energy consumption submodule
Rate semiconductor devices, the time that holds off interval are t3, in the present embodiment, t3=5us, since interval time is very short and capacitor
Buffer function, in transient state, the voltage for being applied to resistance is gradually decreased, until all submodules are all put into, resistance
Upper receiving voltage reaches minimum value, and the ability to consume energy at this time reaches minimum, holds time as T2 ...
Two states switch repeatedly, and the control to route DC voltage can be realized, DC voltage is made to maintain 210-
Between 230kV.Entire control sequential figure is as shown in Figure 3.
The above examples are only used to illustrate the technical scheme of the present invention rather than its limitations, carries out referring to above-described embodiment
Various forms is modified or is changed within the scope of the present invention.
Claims (10)
1. a kind of chain type energy-consuming device, which is characterized in that described device is made of energy consumption branch with energy consumption resistor, the energy consumption branch
It routes at least one equidirectional series connection of energy consumption submodule to constitute, the head end of the series connection and the high potential of DC line
Electrode connection；The energy consumption resistor centralized arrangement and energy consumption branch are connected in series, one end of energy consumption resistor and the tail of energy consumption branch
The low-potential electrode of end connection, the other end and DC line connects；The energy consumption submodule is by the first power semiconductor switch device
Part, diode and DC capacitor are constituted, wherein the first power semiconductor switch is connect with Diode series, connection type has
Following two:
Connection type 1: the cathode of diode and the anode of DC capacitor connect, and the anode of diode is opened with the first power semiconductor
The collector connection of device is closed, the emitter of the first power semiconductor and the cathode of DC capacitor connect；
2: the first power semiconductor switch collector of connection type is connect with DC capacitor anode, and the first power semiconductor is opened
The cathode for closing device emitter and diode connects, and the anode of diode and the cathode of DC capacitor connect；
The collector of first power semiconductor switch is as positive leading point, and emitter is as cathode leading point.
2. a kind of chain type energy-consuming device as described in claim 1, it is characterised in that: the diode in the energy consumption submodule is also
One the second power semiconductor switch of reverse parallel connection.
3. a kind of chain type energy-consuming device as described in claim 1, it is characterised in that: the energy consumption resistor one also in parallel by two
The voltage clamping unit that pole pipe is constituted.
4. a kind of chain type energy-consuming device as described in claim 1, it is characterised in that: an energy consumption submodule side also in parallel
Way switch.
5. a kind of chain type energy-consuming device as described in claim 1, it is characterised in that: the energy consumption branch of the chain type energy-consuming device
It also connects at least one charhing unit, the charhing unit is made of charging resistor and charge switch parallel connection.
6. a kind of chain type energy-consuming device as described in claim 1, it is characterised in that: the chain type energy-consuming device is also connected at least
One cutoff switch.
7. a kind of chain type energy-consuming device as described in claim 1, it is characterised in that: the energy consumption resistor replaces with accumulator,
The accumulator has charging and discharging capabilities.
8. a kind of chain type energy-consuming device as described in claim 1, it is characterised in that: the energy consumption submodule only includes that machinery is opened
It closes.
9. a kind of control method based on chain type energy-consuming device described in claim 1, it is characterised in that: when device starting, institute
The method of stating includes the following steps:
Step 1: the power semiconductor switch shutdown in the energy consumption submodule, the charge switch separate, cutoff switch
It separates；
Step 2: after DC line electrification, being closed cutoff switch, filled by DC capacitor of the charging resistor into energy consumption submodule
Electricity；
Step 3: after the completion of to be charged, being closed charge switch, charging resistor is bypassed.
10. a kind of control method based on chain type energy-consuming device described in claim 1, it is characterised in that: when device detects directly
When Flow Line over-voltage, described method includes following steps:
Step 1: described device real-time detection AC line voltage should when AC line voltage is not above upper limit value Umax
Device is in standby mode；
Step 2: when AC line voltage is more than upper limit value Umax, described device is in energy consumption mode, is transferred to step 3；
Step 3: sequentially turning on the first power semiconductor in energy consumption submodule, the conduction interval time is t；
Step 4: after all first power semiconductors are both turned on, maintaining the state for time length is T1；
Step 5: detection AC line voltage successively turns off energy consumption submodule when AC line voltage is lower than lower limit value Umin
In the first power semiconductor, hold off interval the time be t3；
Step 6: after all first power semiconductors are turned off, maintaining the state for time length is T2；
Step 7: under energy consumption mode, once detecting that energy consumption submodule voltage exceeds maximum tolerance value, the first function being connected immediately
Rate semiconductor devices.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811397272.4A CN109617108B (en) | 2018-11-22 | 2018-11-22 | Chain type energy consumption device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811397272.4A CN109617108B (en) | 2018-11-22 | 2018-11-22 | Chain type energy consumption device and control method thereof |
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| CN109617108A true CN109617108A (en) | 2019-04-12 |
| CN109617108B CN109617108B (en) | 2022-05-13 |
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Cited By (3)
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| CN112187029A (en) * | 2019-07-05 | 2021-01-05 | 西安许继电力电子技术有限公司 | Direct current energy consumption device |
| CN113452059A (en) * | 2020-03-25 | 2021-09-28 | 许继电气股份有限公司 | Offshore wind power direct current sending-out system with direct current energy consumption function and control method |
| CN117134402A (en) * | 2022-05-20 | 2023-11-28 | 南京南瑞继保电气有限公司 | Consumption and storage integrated converter for direct current transmission system and control method thereof |
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| CN109617108B (en) | 2022-05-13 |
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