CN108173271A - A kind of subsynchronous oscillation damping control system of redundancy structure - Google Patents
A kind of subsynchronous oscillation damping control system of redundancy structure Download PDFInfo
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- CN108173271A CN108173271A CN201611115596.5A CN201611115596A CN108173271A CN 108173271 A CN108173271 A CN 108173271A CN 201611115596 A CN201611115596 A CN 201611115596A CN 108173271 A CN108173271 A CN 108173271A
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- oscillation damping
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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Abstract
The invention discloses a kind of subsynchronous oscillation damping control systems of redundancy structure, and two sets of subsynchronous oscillation damping controllers and two sets of electric and electronic power units are configured；It is communicated between two sets of subsynchronous oscillation damping controllers by communication interface or dummycable, the damping control signal of each subsynchronous oscillation damping controller output is respectively to two sets of electric and electronic power units, two sets of electric and electronic power units export subsynchronous electric current respectively, the primary equipment side of electric system is also accessed by tietransformer, subsynchronous electric current is input to the primary equipment side of electric system, two sets of subsynchronous oscillation damping controllers are spare each other.The present invention realizes data smoothing switching in switching, has taken into account reliability and cost factor, can reach higher comprehensive benefit, have a good application prospect.
Description
Technical field
The present invention relates to subsynchronous oscillation of electrical power system technical fields, and in particular to a kind of sub-synchronous oscillation of redundancy structure
Damped control system.
Background technology
It is mended for those " putting to net " and by string or the power plant of the long distance powedr transmission of direct current transportation, electric system is easily produced
Raw sub-synchronous oscillation, and cause generator shafting torsional oscillation.At present, in order to inhibit shafting torsional oscillation, mitigate sub-synchronous oscillation to power generation
The damage of the big axis of machine, increases controlling unit on power electronics dispatch control system, as supplementary excitation damping control system (SEDC),
Static compensator (SVC, SVG etc.), NGH dampers etc..Since Excitation Damping control system, SVC, SVG are regularization amount
Equipment is produced, and subsynchronous antihunt signal is computationally intensive, generally introduce one as subsynchronous oscillation damping device using self-contained unit
Rotating speed, electric current, voltage or the power signal of secondary device are filtered by mode, ratio phase shift, the links such as amplitude limit calculate generation damping
Signal is controlled, then is sent through optical fiber to electric and electronic power units such as Excitation Damping control (SEDC), SVC or SVG, and then is exported secondary
Synchronizing current inhibits sub-synchronous oscillation.
At present, in practical applications, the connection side between subsynchronous oscillation damping controller and electric and electronic power unit
There are mainly three types of formulas：
The first is single set cascaded structure, is connected between subsynchronous oscillation damping device and electric and electronic power unit for single-line type
It connects, as shown in Figure 1, the structure is there are larger unreliability, when subsynchronous oscillation damping device or electric and electronic power unit go out
When existing hardware fault or therebetween communication link exception, cause to fail, subsynchronous electric current can not be exported and inhibit signal.
For second controller redundancy configuration structure, a master one from two sets of subsynchronous oscillation damping controllers respectively with electricity
Power electronic power unit is connected, as shown in Figure 2.When subsynchronous oscillation damping master controller exception, electric and electronic power unit
It automatically switches to and subsynchronous electric current inhibition signal is generated from the signal of controller using subsynchronous oscillation damping.The program solves
The integrity problem of subsynchronous oscillation damping controller, still, when the hardware fault or exception of electric and electronic power unit itself
When, cause to fail, subsynchronous electric current can not be exported and inhibit signal.
The third is full redundancy structure, and two sets of electric and electronic power units are configured, and often covers the appearance of electric and electronic power unit
Amount be needed for capacity half, corresponding to often covering electric and electronic power unit, master and slave two sets of equal configuring redundancy subsynchronous to shake
Damping controller is swung, as shown in Figure 3.The structural reliability is high, even if wherein a set of electric and electronic power unit failure or exception,
It is another set of still to work normally, still there is the damping control ability of half.But four sets of subsynchronous oscillation dampings controls of the system configuration
Device, cost are higher.
In conclusion existing subsynchronous oscillation damping controller and electric and electronic power unit connection mode, exist
How the shortcomings that certain solves the above problems, optimization system performance, is current urgent problem.
Invention content
The purpose of the present invention is overcome existing subsynchronous oscillation damping controller and electric and electronic power unit connection side
Formula, it is existing the shortcomings that.Two sets of sub-synchronous oscillation resistances are configured in the subsynchronous oscillation damping control system of the redundancy structure of the present invention
Buddhist nun's controller and two sets of electric and electronic power units, and switching when realize data smoothing switching, taken into account reliability and
Cost factor can reach higher comprehensive benefit, have a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is：
The subsynchronous oscillation damping control system of a kind of redundancy structure, including subsynchronous oscillation damping controller, electric power electricity
Sub- power cell and tietransformer, it is characterised in that：Two sets of subsynchronous oscillation damping controllers and two sets of power electronics are configured
Power cell；It is communicated between two sets of subsynchronous oscillation damping controllers by communication interface or dummycable, it is each subsynchronous
The damping control signal of oscillation damping controller output is respectively to two sets of electric and electronic power units, two sets of power electronics
Power cell exports subsynchronous electric current respectively, and the primary equipment side of electric system is also accessed by tietransformer, will be secondary same
Step electric current is input to the primary equipment side of electric system, and two sets of subsynchronous oscillation damping controllers are spare each other.
A kind of subsynchronous oscillation damping control system of aforementioned redundancy structure, it is characterised in that：Two sets of sub-synchronous oscillations
Damping controller is respectively connected to the input signal for calculating damping control amount, and the input signal is electric system primary equipment
Tach signal, electric current, voltage or power signal or above-mentioned each signal combination.
A kind of subsynchronous oscillation damping control system of aforementioned redundancy structure, it is characterised in that：Two sets of sub-synchronous oscillations
Damping controller is respectively connected to the input signal for needing to implement subsynchronous damping control primary equipment in electric system.
A kind of subsynchronous oscillation damping control system of aforementioned redundancy structure, it is characterised in that：When wherein a set of time same
It walks oscillation damping controller and exception occurs, damping control signal is caused to calculate and is staggered the time, which is controlled
Device corresponding information is sent by communication interface or dummycable to another set of subsynchronous oscillation damping controller.
A kind of subsynchronous oscillation damping control system of aforementioned redundancy structure, it is characterised in that：Each sub-synchronous oscillation resistance
Buddhist nun's controller also output services status signal is to two sets of electric and electronic power units.
A kind of subsynchronous oscillation damping control system of aforementioned redundancy structure, it is characterised in that：Described two sets subsynchronous
Oscillation damping controller include the first subsynchronous oscillation damping controller, the second subsynchronous oscillation damping controller, described two sets
Electric and electronic power unit includes the first electric and electronic power unit, the second electric and electronic power unit,
During normal operation, the first electric and electronic power unit uses the damping of the first subsynchronous oscillation damping controller output
Signal is controlled to generate synchronizing current；Second electric and electronic power unit uses the resistance of the second subsynchronous oscillation damping controller output
Buddhist nun controls signal to generate synchronizing current；
If the first electric and electronic power unit or the second electric and electronic power unit adopt corresponding subsynchronous oscillation damping
There is abnormal, first electric and electronic power unit or the second electric and electronic power unit in controller, automatically switches to another
A set of subsynchronous oscillation damping controller generates synchronizing current using the damping control signal of its output.
A kind of subsynchronous oscillation damping control system of aforementioned redundancy structure, it is characterised in that：The sub-synchronous oscillation
Damping controller occur it is abnormal, it is defeated including subsynchronous oscillation damping controller hardware fault and subsynchronous oscillation damping controller
Enter signal and exception occur.
A kind of subsynchronous oscillation damping control system of aforementioned redundancy structure, it is characterised in that：The first electric power electricity
Sub- power cell or the second electric and electronic power unit when automatically switching to another set of subsynchronous oscillation damping controller, are
Data smoothing is realized by formula (1),
Wherein, D0(0) the damping control letter exported to there is abnormal subsynchronous oscillation damping device in abnormal previous moment
Number, D1(0) it is and D0(0) damping control signal of another set of subsynchronous oscillation damping device output in the same time, D1(n) be n-th when
The damping control signal of another set of subsynchronous oscillation damping device output during quarter；D (n) is to act at the n-th moment abnormal time occur
The damping control signal of the corresponding electric and electronic power unit output of synchronized oscillation damper；M is seamlessly transits data
The duration of processing.
The beneficial effects of the invention are as follows：The subsynchronous oscillation damping control system of the redundancy structure of the present invention is configured two sets
Subsynchronous oscillation damping controller and two sets of electric and electronic power units, and data smoothing switching is realized in switching, it is simultaneous
Reliability and cost factor have been cared for, higher comprehensive benefit can be reached, had a good application prospect.
Description of the drawings
Fig. 1 is to be in the prior art for single-line type connection between subsynchronous oscillation damping device and electric and electronic power unit
System block diagram.
Fig. 2 is device redundant configuration in order to control between subsynchronous oscillation damping device and electric and electronic power unit in the prior art
The system block diagram of structure.
Fig. 3 is to be in the prior art for full redundancy structure between subsynchronous oscillation damping device and electric and electronic power unit
System block diagram.
Fig. 4 is the system block diagram of the subsynchronous oscillation damping control system of the redundancy structure of the present invention.
Fig. 5 is the system block diagram of the specific embodiment of the present invention.
Fig. 6 is that the subsynchronous oscillation damping controller of the specific embodiment of the present invention is sent to the data content of SVC
Message figure.
Fig. 7 is the report of data content that two sets of subsynchronous oscillation damping controllers of the specific embodiment of the present invention are mutually sent out
Texts and pictures.
Fig. 8 is the design sketch of the damping control amount smoothing algorithm of the specific embodiment of the present invention.
Specific embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
Two sets of subsynchronous oscillation damping controllers are configured in the subsynchronous oscillation damping control system of the redundancy structure of the present invention
With two sets of electric and electronic power units；It is carried out between two sets of subsynchronous oscillation damping controllers by communication interface or dummycable
Communication, the damping control signal of each subsynchronous oscillation damping controller output is respectively to two sets of electric and electronic power units, institute
It states two sets of electric and electronic power units and exports subsynchronous electric current respectively, the primary of electric system is also accessed by tietransformer
Synchronizing current is input to the primary equipment side of electric system by equipment side, and two sets of subsynchronous oscillation damping controllers are each other
It is spare.
Two sets of subsynchronous oscillation damping controllers are respectively connected to the input signal for calculating damping control amount, the input
Combination of the signal for tach signal, electric current, voltage or the power signal or above-mentioned each signal of electric system primary equipment.
Two sets of subsynchronous oscillation damping controllers are respectively connected to need in electric system to implement subsynchronous damping control primary
The input signal of equipment.
When wherein a set of subsynchronous oscillation damping controller appearance exception, damping control signal is caused to calculate and is staggered the time, it will
The set subsynchronous oscillation damping controller corresponding information, which is sent by communication interface or dummycable to another set of sub-synchronous oscillation, to be hindered
Buddhist nun's controller.
Each subsynchronous oscillation damping controller also output services status signal is to two sets of electric and electronic power units.
Two sets of subsynchronous oscillation damping controllers include the first subsynchronous oscillation damping controller, second subsynchronous shake
Damping controller is swung, two sets of electric and electronic power units include the first electric and electronic power unit, the second power electronics work(
Rate unit,
During normal operation, the first electric and electronic power unit uses the damping of the first subsynchronous oscillation damping controller output
Signal is controlled to generate subsynchronous electric current；Second electric and electronic power unit is using the output of the second subsynchronous oscillation damping controller
Damping control signal generates subsynchronous electric current；
If the first electric and electronic power unit or the second electric and electronic power unit adopt corresponding subsynchronous oscillation damping
There is abnormal, first electric and electronic power unit or the second electric and electronic power unit in controller, automatically switches to another
A set of subsynchronous oscillation damping controller generates subsynchronous electric current using the damping control signal of its output.
There is exception in the subsynchronous oscillation damping controller, different including the self-test of subsynchronous oscillation damping controller hardware and software
Often and there is exception in the input signal of subsynchronous oscillation damping controller.
First electric and electronic power unit or the second electric and electronic power unit automatically switch to another set of time together
It is that data smoothing is realized by formula (1) when walking oscillation damping controller,
Wherein, D0(0) the damping control letter exported to there is abnormal subsynchronous oscillation damping device in abnormal previous moment
Number, D1(0) it is and D0(0) damping control signal of another set of subsynchronous oscillation damping device output in the same time, D1(n) be n-th when
The damping control signal of another set of subsynchronous oscillation damping device output during quarter；D (n) is to act at the n-th moment abnormal time occur
The damping control signal of the corresponding electric and electronic power unit output of synchronized oscillation damper；M is seamlessly transits data
The duration of processing.
The subsynchronous oscillation damping control system of redundancy structure according to the present invention, introduces a specific embodiment, with firepower
For power plant Subsynchronous Oscillation of Turbine-generator Set damped control system, certain power plant totally two 600MW Turbo-generator Sets are adopted
By the use of SVC as electric and electronic power unit, required SVC total capacities are 120Mvar.It is hindered for the power plant design sub-synchronous oscillation
Buddhist nun's control system, as shown in figure 5, installing two sets of SVC altogether, capacity is 60Mvar, is parallel to the low-pressure side of tietransformer, and two
Set subsynchronous oscillation damping controller introduces the tach signals of two units, filtered through mode, ratio phase shift, the processing such as amplitude limit
Afterwards, the damping control signal calculated is sent respectively through optical fiber to two SVC, the data content of transmission, as shown in Figure 6；Two sets
It is also interconnected (communication interface) through optical fiber between subsynchronous oscillation damping controller, the data content of transmission is as shown in Figure 7.
During normal operation, the first SVC generates subsynchronous electricity using the damping control signal of subsynchronous oscillation damping controller 1
Stream, the 2nd SVC generate subsynchronous electric current using the damping control signal of subsynchronous oscillation damping controller 2 and export to system,
" xth set subsynchronous oscillation damping controller state " is 1 in the data content that SVC is received, expression normal operating condition, and two
" this set synchronized oscillation damping controller state " mutually passed between set subsynchronous oscillation damping controller is also 1, represents normal
Operating status.
When 1 hardware fault of the first subsynchronous oscillation damping controller or input signal exist it is abnormal when, on the one hand, to the
" this set synchronized oscillation damping controller state " that second synchronization oscillation damping controller 2 is sent is set to 0, the resistance of the second sub-synchronous oscillation
After Buddhist nun's controller 2 receives the status data, " the first set subsynchronous oscillation damping control that is sent in the data content of two sets of SVC
Device state processed " is set to 0；On the other hand, subsynchronous oscillation damping controller 1 is sent to the " first set in the data content of two sets of SVC
Subsynchronous oscillation damping controller state " is also set to 0.First SVC is controlled by comparing the two sets of subsynchronous oscillation dampings received
The status information that device provides confirms that subsynchronous oscillation damping controller 1 is abnormal, and automatic smoothing switches to subsynchronous oscillation damping control
The output signal of device 2 processed.
Assuming that the damping control numerical quantity that the first SVC is received before the handover is 1000 (they being 0 moment by the moment definition),
It is -2500 to switch to the first damping control numerical quantity received after the second subsynchronous oscillation damping controller 2, then subsequent
In 40 discrete point times, subsynchronous current signal is generated using the new damping control amount after smoothing computation, specific number
According to as shown in the table：
Smoothing process represent when parameter on, as shown in Figure 8.
In conclusion the subsynchronous oscillation damping control system of the redundancy structure of the present invention, is configured two sets of sub-synchronous oscillations
Damping controller and two sets of electric and electronic power units, and data smoothing switching is realized in switching, take into account reliability
And cost factor, higher comprehensive benefit can be reached, had a good application prospect.
Basic principle, the main features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (8)
1. a kind of subsynchronous oscillation damping control system of redundancy structure, including subsynchronous oscillation damping controller, power electronics
Power cell and tietransformer, it is characterised in that：Two sets of subsynchronous oscillation damping controllers and two sets of power electronics work(are configured
Rate unit；It is communicated between two sets of subsynchronous oscillation damping controllers by communication interface or dummycable, it is each subsynchronous to shake
The damping control signal of damping controller output is swung respectively to two sets of electric and electronic power units, two sets of power electronics work(
Rate unit exports subsynchronous electric current respectively, and the primary equipment side of electric system is also accessed by tietransformer, will be subsynchronous
Electric current is input to the primary equipment side of electric system, and two sets of subsynchronous oscillation damping controllers are spare each other.
2. a kind of subsynchronous oscillation damping control system of redundancy structure according to claim 1, it is characterised in that：Two sets
Subsynchronous oscillation damping controller is respectively connected to the input signal for calculating damping control amount, and the input signal is power train
The combination of tach signal, electric current, voltage or the power signal or above-mentioned each signal of unified secondary device.
3. a kind of subsynchronous oscillation damping control system of redundancy structure according to claim 2, it is characterised in that：Two sets
Subsynchronous oscillation damping controller is respectively connected to the input for needing to implement subsynchronous damping control primary equipment in electric system letter
Number.
4. a kind of subsynchronous oscillation damping control system of redundancy structure according to claim 1, it is characterised in that：When it
In a set of subsynchronous oscillation damping controller occur abnormal, damping control signal is caused to calculate and is staggered the time, is shaken the set is subsynchronous
Damping controller corresponding information is swung to send to another set of subsynchronous oscillation damping controller by communication interface or dummycable.
5. a kind of subsynchronous oscillation damping control system of redundancy structure according to claim 1, it is characterised in that：Each time
Synchronized oscillation damping controller also output services status signal is to two sets of electric and electronic power units.
6. a kind of subsynchronous oscillation damping control system of redundancy structure according to claim 1, it is characterised in that：It is described
Two sets of subsynchronous oscillation damping controllers include the first subsynchronous oscillation damping controller, the second sub-synchronous oscillation damping control
Device, two sets of electric and electronic power units include the first electric and electronic power unit, the second electric and electronic power unit,
During normal operation, the first electric and electronic power unit uses the damping control of the first subsynchronous oscillation damping controller output
Signal generates synchronizing current；Second electric and electronic power unit uses the damping control of the second subsynchronous oscillation damping controller output
Signal processed generates synchronizing current；
If the first electric and electronic power unit or the corresponding subsynchronous oscillation damping controller of the second electric and electronic power unit
There is abnormal, first electric and electronic power unit or the second electric and electronic power unit, automatically switch to another set of time
Synchronized oscillation damping controller generates subsynchronous electric current using the damping control signal of its output.
7. a kind of subsynchronous oscillation damping control system of redundancy structure according to claim 4 or 6, it is characterised in that：
There is exception in the subsynchronous oscillation damping controller, abnormal and secondary including the self-test of subsynchronous oscillation damping controller hardware and software
The input signal of synchronized oscillation damping controller occurs abnormal.
8. a kind of subsynchronous oscillation damping control system of redundancy structure according to claim 6, it is characterised in that：It is described
First electric and electronic power unit or the second electric and electronic power unit automatically switch to another set of subsynchronous oscillation damping control
It is that data smoothing is realized by formula (1) during device processed,
Wherein, D0(0) damping control signal exported to there is abnormal subsynchronous oscillation damping device in abnormal previous moment, D1
(0) it is and D0(0) damping control signal of another set of subsynchronous oscillation damping device output in the same time, D1(n) for the n-th moment when
The damping control signal of another set of subsynchronous oscillation damping device output；D (n) is to act at the n-th moment the subsynchronous of exception occur
The damping control signal of the corresponding electric and electronic power unit output of oscillation damper；M is carries out data to seamlessly transit processing
Duration.
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Cited By (1)
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| CN113389602A (en) * | 2020-03-11 | 2021-09-14 | 南京南瑞继保电气有限公司 | Anti-misoperation method and device for additional excitation damping control signal of steam turbine generator unit |
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