CN208352986U - A kind of control device based on asynchronous mains frequency characteristic - Google Patents
A kind of control device based on asynchronous mains frequency characteristic Download PDFInfo
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- CN208352986U CN208352986U CN201820657126.XU CN201820657126U CN208352986U CN 208352986 U CN208352986 U CN 208352986U CN 201820657126 U CN201820657126 U CN 201820657126U CN 208352986 U CN208352986 U CN 208352986U
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Abstract
The utility model discloses a kind of control devices based on asynchronous mains frequency characteristic, including simulator, direct-flow controlling device, set speed adjustment device, frequency monitoring device and high-frequency cutting machine device；Wherein, simulator is separately connected direct-flow controlling device, set speed adjustment device, frequency monitoring device and high-frequency cutting machine device；Frequency monitoring device connects high-frequency cutting machine device；Frequency monitoring device is used to calculate the asynchronous power grid generation direct current monopole locking of the simulator simulation and the first sending end frequency after DC bipolar block in the direct-flow controlling device in the set speed adjustment device according to the direct current frequency limitation control function parameter set and the Hydropower Unit speed regulation parameter set and the second sending end frequency after receiving end AC fault occurs, so that the high-frequency cutting machine device obtains high-frequency cutting machine amount according to the first sending end frequency and the second sending end frequency.Using the utility model embodiment, the frequency of asynchronous power grid can be made to keep stablizing.
Description
Technical field
The utility model relates to electricity net safety stable control technology field, more particularly to one kind are special based on asynchronous mains frequency
The control device of property.
Background technique
AC and DC transmission parallel running (AC/DC parallel bulk power grid) refers to existing exchange between two AC electric power systems
Power transmission line networking has DC transmission line to be connected and the network operation mode that is connected in parallel to each other of the ac transmission that is formed and direct current transportation again.
The starting point of ac transmission and direct current transportation can be the same point in sending end power grid, be also possible to different location, terminal is often
It is to be also possible to same point in the different location of receiving end power grid.High-capacity direct current usually occurs in AC/DC parallel bulk power grid
Generator rotor angle destabilization problems caused by switch failure in locking and single-phase short circuit, by sending end power grid and master by the way of Asynchronous Interconnection
Net isolation, is only connected with each other by DC line.After Asynchronous Interconnection, the frequency stabilization problem and its protrusion of sending end power grid, great Rong
The frequency that the catastrophe failures such as switch failure may cause sending end power grid in the locking of amount direct current and single-phase short circuit is substantially increased, from
And leading to high-frequency cutting machine device frequent movement, movement is improper to will further result in mains frequency unstability.
Utility model content
The purpose of the utility model embodiment is to provide a kind of control device based on asynchronous mains frequency characteristic, with high frequency
Cutting machine amount and calculating and adjust for control target influences maximum direct current frequency limitation control function ginseng to asynchronous mains frequency characteristic
Several and Hydropower Unit adjusts the speed parameter, and the frequency of asynchronous power grid is made to keep stablizing.
To achieve the above object, the utility model embodiment provides a kind of control dress based on asynchronous mains frequency characteristic
It sets, including simulator, direct-flow controlling device, set speed adjustment device, frequency monitoring device and high-frequency cutting machine device；Wherein,
The simulator is separately connected the direct-flow controlling device, the set speed adjustment device, frequency monitoring dress
It sets and the high-frequency cutting machine device；The frequency monitoring device connects the high-frequency cutting machine device；
The frequency monitoring device is used to limit control function according to the direct current frequency set in the direct-flow controlling device
The Hydropower Unit speed regulation parameter set in parameter and the set speed adjustment device calculates the asynchronous power grid of the simulator simulation
Second after the first sending end frequency and generation receiving end AC fault after the locking of direct current monopole and DC bipolar block occurs is sent
Frequency is held, so that the high-frequency cutting machine device obtains high-frequency cutting machine according to the first sending end frequency and the second sending end frequency
Amount.
Compared with prior art, a kind of control device based on asynchronous mains frequency characteristic disclosed by the utility model passes through
Frequency monitoring device calculate the asynchronous power grid occur the first sending end frequency after the locking of direct current monopole and DC bipolar block and
Second sending end frequency of the asynchronous power grid after receiving end AC fault occurs for the asynchronous power grid, is then filled again by high-frequency cutting machine
It sets and obtains the first sending end frequency and the second sending end frequency, finally judge whether the high-frequency cutting machine amount is zero, works as institute
When to state high-frequency cutting machine amount be zero, the frequency stabilization of the asynchronous power grid is determined；When the high-frequency cutting machine amount is not zero, described in judgement
The frequency of asynchronous power grid is unstable, at this point, by adjusting the direct current frequency limitation control function ginseng in the direct-flow controlling device
Number is with the Hydropower Units speed regulation parameters in set speed adjustment device so that the frequency stabilization of the asynchronous power grid.Solves the prior art
After middle Asynchronous Interconnection, the frequency stabilization problem and its protrusion of sending end power grid, high-capacity direct current locking and single-phase short circuit in switch
The frequency that the catastrophe failures such as tripping may cause sending end power grid is substantially increased, so as to cause high-frequency cutting machine device frequent movement,
Improper the problem of will further result in mains frequency unstability is acted, can be that control target be calculated and be adjusted pair with high-frequency cutting machine amount
Asynchronous mains frequency characteristic influences maximum direct current frequency limitation control function parameter and Hydropower Unit adjusts the speed parameter, makes asynchronous electricity
The frequency of net keeps stablizing.
As an improvement of the above scheme, the direct-flow controlling device includes perfecting direct-flow controlling device and failure DC control
Device, wherein
It is described to perfect direct-flow controlling device and the failure direct-flow controlling device is all connected with the simulator.
As an improvement of the above scheme, the control device based on asynchronous mains frequency characteristic further includes stability contorting dress
It sets, the stabilization control device is separately connected the failure direct-flow controlling device and the simulator.
As an improvement of the above scheme, the direct current frequency limitation control function parameter includes the first pid parameter, direct current frequency
The dead zone of rate limitation, the amplitude limit value up and down of dc power and throwing countermand value.
As an improvement of the above scheme, the Hydropower Unit speed regulation parameter includes the second pid parameter, difference coefficient, frequency modulation
Dead zone and water hammer effect time constant.
As an improvement of the above scheme, the receiving end AC fault includes that failure and alternating current circuit are single-phase forever for alternating current circuit list
The failure mode of switch failure in short circuit.
Detailed description of the invention
Fig. 1 is that a kind of structure of control device based on asynchronous mains frequency characteristic provided by the embodiment of the utility model is shown
It is intended to；
Fig. 2 is a kind of process of control device based on asynchronous mains frequency characteristic provided by the embodiment of the utility model
Figure；
Fig. 3 is the structure of another control device based on asynchronous mains frequency characteristic provided by the embodiment of the utility model
Schematic diagram.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
It is a kind of control device based on asynchronous mains frequency characteristic provided by the embodiment of the utility model referring to Fig. 1, Fig. 1
Structural schematic diagram；Including simulator 1, direct-flow controlling device 2, set speed adjustment device 3, frequency monitoring device 4 and high frequency
Cut machine device 5；Wherein,
The simulator 1 is separately connected the direct-flow controlling device 2, the set speed adjustment device 3, the frequency monitoring
Device 4 and the high-frequency cutting machine device 5；The frequency monitoring device 4 connects the high-frequency cutting machine device 5；
Preferably, referring to fig. 2, the frequency monitoring device 4 is used for according to the direct current set in the direct-flow controlling device 2
The Hydropower Unit speed regulation parameter set in frequency limit control function parameter and the set speed adjustment device 3 calculates the emulation dress
The asynchronous power grid for setting 1 simulation occurs the locking of direct current monopole and exchanges with the first sending end frequency after DC bipolar block with receiving end occurs
The second sending end frequency after failure, so that the high-frequency cutting machine device 5 is according to the first sending end frequency and second sending end
Frequency obtains high-frequency cutting machine amount.
This programme in simulated grid by implementing, it is therefore an objective to by being calculated and being adjusted for control target with high-frequency cutting machine amount
Maximum direct current frequency limitation control function parameter is influenced on asynchronous mains frequency characteristic and Hydropower Unit adjusts the speed parameter, acquires energy
So that the frequency of asynchronous power grid is kept stable optimal parameter, is then applied in true power grid again, it is straight so as to avoid
Scoop out the problem of being used in true power grid and causing electric network fault.Therefore, it is built in advance by simulator 1 true for simulating
The simulated grid of real asynchronous power grid, it is preferred that the simulator 1 is RTDS emulator.
It wherein, is another kind provided by the embodiment of the utility model based on asynchronous mains frequency characteristic referring to Fig. 3, Fig. 3
The structural schematic diagram of control device.The asynchronous power grid includes direct current primary system real-time digital model 11, unit primary system
Real-time digital model 12, AC power network real-time digital model 13 and load real-time digital model 14.The direct current is once
Real-time digital model 11 of uniting is used for the primary system of analog DC engineering, and the unit primary system real-time digital model 12 is used for
Simulation generator set, the AC power network real-time digital model 13 is used to simulate the AC network of actual electric network, described negative
Lotus real-time digital model 14 is for simulating practical electric load.
Preferably, the direct-flow controlling device 2 includes perfecting direct-flow controlling device 21 and failure direct-flow controlling device 22, institute
It states and perfects the direct current that direct-flow controlling device 21 and the failure direct-flow controlling device 22 are all connected in the simulator 1 and be once
System real-time digital model 11.Specifically, the direct-flow controlling device 1 is for setting direct current frequency limitation control function parameter；Institute
State direct current frequency limitation control function parameter include the first pid parameter, direct current frequency limitation dead zone, dc power bound
Amplitude and throwing countermand value.
Wherein, the direct current frequency limitation control function parameter can be set by the direct-flow controlling device 21 that perfects,
The direct-flow controlling device 21 that perfects is for detecting the direct current frequency of the direct current primary system real-time digital model 11, when described
When direct current frequency is more than the dead zone of direct current frequency limitation, the direct current function of the direct current primary system real-time digital model 11 is controlled
Rate, wherein the dc power is no more than the clipping up and down of the dc power in direct current frequency limitation control function parameter
Value.The direct current frequency limitation control function parameter can also be set by the failure direct-flow controlling device 22.The failure
Direct-flow controlling device 22 is for sending locking order to the direct current primary system real-time digital model 11, so that the asynchronous electricity
The 11 analog DC monopole of direct current primary system real-time digital model locking and DC bipolar block in net.
Specifically, the Hydropower Unit speed regulation parameter includes the second pid parameter, difference coefficient, Regulation dead-band and water hammer effect
Answer time constant.
Preferably, the control device based on asynchronous mains frequency characteristic further includes stabilization control device 6, the stabilization
The unit primary system that control device 6 is separately connected in the failure direct-flow controlling device 22 and the simulator 1 counts in real time
Word model 12 and load real-time digital model 14.The stabilization control device 6 is ordered for also receiving the locking, and according to institute
It states locking order and cuts off the unit primary system real-time digital model 12 and/or the load real-time digital model 14, so that
The asynchronous power grid keeps stablizing, and will cut off the unit primary system real-time digital model 12 and/or the load is real-time
The result of mathematical model 14 feeds back to the failure direct-flow controlling device 22.
Preferably, the frequency monitoring device 4 limits control function parameter and the hydroelectric machine according to the direct current frequency
After group speed regulation parameter calculates the generation of the direct current primary system real-time digital model 11 direct current monopole locking and DC bipolar block
The first sending end frequency, wherein in the direct current primary system real-time digital model 11 analog DC monopole locking and direct current
The process of bipolar locking.In the process, the sending end of the acquisition unit primary system real-time digital model 12 can be passed through
The first sending end frequency is calculated using phaselocked loop in the generator terminal three-phase voltage of Hydropower Unit.
Preferably, when 11 analog DC monopole of the direct current primary system real-time digital model locking is with DC bipolar block
Consider the different faults forms such as the movement of stabilization control device 6 and 6 tripping of stabilization control device.Preferably, when described steady
When determining the movement of control device 6, the unit primary system real-time digital model 12 and/or the load real-time digital can be cut off
Model 14, when 6 tripping of stabilization control device, it is real-time that the stabilization control device 6 does not cut off the unit primary system
Mathematical model 12 and/or the load real-time digital model 14.
Specifically, the frequency monitoring device 4 limits control function parameter and the hydroelectric machine according to the direct current frequency
Group speed regulation parameter calculates the AC power network real-time digital model 13 and the second sending end frequency after receiving end AC fault occurs；
Wherein, receiving end AC fault is simulated in the AC power network real-time digital model 13, and mainly considers that alternating current circuit is single
Failure, the different faults form such as switch failure in the single-phase short circuit of alternating current circuit forever.It in the process, can be by acquiring the machine
The generator terminal three-phase voltage of the Hydropower Unit of the sending end of group primary system real-time digital model 12, is calculated institute using phaselocked loop
State the second sending end frequency.
Specifically, the high-frequency cutting machine device 5 obtains the first sending end frequency and the second sending end frequency, and according to
The first sending end frequency and the second sending end frequency are according to preset high-frequency cutting machine policy calculation high-frequency cutting machine amount.Wherein,
The high-frequency cutting machine strategy can be set according to the unit primary system real-time digital model 12, it is preferred that the height
It includes 8 wheels that frequency, which cuts machine strategy, and the movement definite value of the first round is f0Hz, and the movement definite value of every wheel successively improves 0.2Hz, time later
Definite value is fixed as 0.2s.
Specifically, can judge whether the high-frequency cutting machine amount is zero by host computer, if the high-frequency cutting machine amount is zero,
Then the high-frequency cutting machine device 5 will not frequent movement, at this point, determine the frequency of the asynchronous power grid be it is controllable, i.e., frequency is steady
It is fixed.If the high-frequency cutting machine amount is not zero, 5 frequent movement of high-frequency cutting machine device, at this point, determining the asynchronous power grid
Frequency be it is uncontrollable, i.e., frequency is unstable.
Specifically, being adjusted by the direct-flow controlling device 2 described when the frequency for determining the asynchronous power grid is unstable
Direct current frequency, which limits control function parameter and adjusts the Hydropower Unit by the set speed adjustment device 3, adjusts the speed parameter until institute
Stating high-frequency cutting machine amount is zero.So as to make the high-frequency cutting machine device 5 will not frequent movement, and then may make the asynchronous power grid
It keeps stablizing.
When it is implemented, being calculated by frequency monitoring device 4, the locking of direct current monopole occurs for the asynchronous power grid and direct current is double
Second sending end of the asynchronous power grid after receiving end AC fault occurs for the first sending end frequency and the asynchronous power grid after the locking of pole
Then frequency obtains the first sending end frequency and the second sending end frequency by high-frequency cutting machine device 5 again, finally judges institute
State whether high-frequency cutting machine amount is zero, when the high-frequency cutting machine amount is zero, determines the frequency stabilization of the asynchronous power grid；The height
When frequency cuts machine amount and is not zero, determine that the frequency of the asynchronous power grid is unstable, at this point, by adjusting the direct-flow controlling device 2
In direct current frequency limitation control function parameter and set speed adjustment device 3 in Hydropower Unit speed regulation parameter so that the asynchronous electricity
The frequency stabilization of net.
Compared with prior art, a kind of control device based on asynchronous mains frequency characteristic disclosed by the utility model solves
In the prior art after Asynchronous Interconnection, the frequency stabilization problem and its protrusion of sending end power grid, high-capacity direct current locking and single-phase
The frequency that the catastrophe failures such as switch failure may cause sending end power grid in short circuit is substantially increased, so as to cause high-frequency cutting machine device
Frequent movement acts improper the problem of will further result in mains frequency unstability, can be in terms of control target by high-frequency cutting machine amount
Calculating and adjusting influences maximum direct current frequency limitation control function parameter and Hydropower Unit speed regulation ginseng to asynchronous mains frequency characteristic
Number makes the frequency of asynchronous power grid keep stablizing.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.
Claims (6)
1. a kind of control device based on asynchronous mains frequency characteristic, which is characterized in that filled including simulator, DC control
It sets, set speed adjustment device, frequency monitoring device and high-frequency cutting machine device；Wherein,
The simulator be separately connected the direct-flow controlling device, the set speed adjustment device, the frequency monitoring device with
And the high-frequency cutting machine device；The frequency monitoring device connects the high-frequency cutting machine device；
The frequency monitoring device is used to limit control function parameter according to the direct current frequency set in the direct-flow controlling device
The asynchronous power grid that the simulator simulation is calculated with the Hydropower Unit speed regulation parameter set in the set speed adjustment device occurs
The second sending end frequency after the first sending end frequency and generation receiving end AC fault after the locking of direct current monopole and DC bipolar block
Rate, so that the high-frequency cutting machine device obtains high-frequency cutting machine amount according to the first sending end frequency and the second sending end frequency.
2. the control device as described in claim 1 based on asynchronous mains frequency characteristic, which is characterized in that the DC control
Device includes perfecting direct-flow controlling device and failure direct-flow controlling device, wherein
It is described to perfect direct-flow controlling device and the failure direct-flow controlling device is all connected with the simulator.
3. the control device as claimed in claim 2 based on asynchronous mains frequency characteristic, which is characterized in that described based on asynchronous
The control device of mains frequency characteristic further includes stabilization control device, and the stabilization control device is separately connected the failure direct current
Control device and the simulator.
4. the control device as described in claim 1 based on asynchronous mains frequency characteristic, which is characterized in that the direct current frequency
Limitation control function parameter includes that the first pid parameter, the dead zone of direct current frequency limitation, the amplitude limit value up and down of dc power and throwing are moved back
Definite value.
5. the control device as described in claim 1 based on asynchronous mains frequency characteristic, which is characterized in that the Hydropower Unit
Adjusting the speed parameter includes the second pid parameter, difference coefficient, Regulation dead-band and water hammer effect time constant.
6. the control device as described in claim 1 based on asynchronous mains frequency characteristic, which is characterized in that the receiving end exchange
Failure includes the failure mode of switch failure in the single failure forever in alternating current circuit and alternating current circuit single-phase short circuit.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400604A (en) * | 2018-05-03 | 2018-08-14 | 南方电网科学研究院有限责任公司 | A kind of control method and device based on asynchronous mains frequency characteristic |
| CN111525598A (en) * | 2020-05-12 | 2020-08-11 | 国网四川省电力公司经济技术研究院 | Optimal generator tripping capacity obtaining method for inhibiting high-frequency problem of transmission-end power grid |
| CN111884229A (en) * | 2020-08-19 | 2020-11-03 | 南方电网科学研究院有限责任公司 | Asynchronous and synchronous control method and system for back-to-back flexible direct current power transmission system |
| CN113890121A (en) * | 2021-09-17 | 2022-01-04 | 中国能源建设集团广东省电力设计研究院有限公司 | Alternating current-direct current wide area cooperative control system and method |
-
2018
- 2018-05-03 CN CN201820657126.XU patent/CN208352986U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400604A (en) * | 2018-05-03 | 2018-08-14 | 南方电网科学研究院有限责任公司 | A kind of control method and device based on asynchronous mains frequency characteristic |
| CN111525598A (en) * | 2020-05-12 | 2020-08-11 | 国网四川省电力公司经济技术研究院 | Optimal generator tripping capacity obtaining method for inhibiting high-frequency problem of transmission-end power grid |
| CN111525598B (en) * | 2020-05-12 | 2023-04-11 | 国网四川省电力公司经济技术研究院 | Optimal generator tripping capacity obtaining method for inhibiting high-frequency problem of transmission-end power grid |
| CN111884229A (en) * | 2020-08-19 | 2020-11-03 | 南方电网科学研究院有限责任公司 | Asynchronous and synchronous control method and system for back-to-back flexible direct current power transmission system |
| CN111884229B (en) * | 2020-08-19 | 2022-03-08 | 南方电网科学研究院有限责任公司 | Asynchronous and synchronous control method and system for back-to-back flexible direct current power transmission system |
| CN113890121A (en) * | 2021-09-17 | 2022-01-04 | 中国能源建设集团广东省电力设计研究院有限公司 | Alternating current-direct current wide area cooperative control system and method |
| CN113890121B (en) * | 2021-09-17 | 2023-08-18 | 中国能源建设集团广东省电力设计研究院有限公司 | AC/DC wide area cooperative control system and method |
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Effective date of registration: 20210715 Address after: No. 11, Kexiang Road, Science City, Huangpu District, Guangzhou City, Guangdong Province Patentee after: China Southern Power Grid Research Institute Co.,Ltd. Patentee after: CHINA SOUTHERN POWER GRID Co.,Ltd. Address before: No. 11, Kexiang Road, Science City, Huangpu District, Guangzhou City, Guangdong Province Patentee before: China Southern Power Grid Research Institute Co.,Ltd. Patentee before: CSG POWER GRID TECHNOLOGY RESEARCH CENTER Patentee before: CHINA SOUTHERN POWER GRID Co.,Ltd. |
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