CN101409462A - Multilevel monitor-control method for monitoring and controlling hyposynchronous oscillation of synthesis power generating plant and electric network information - Google Patents
Multilevel monitor-control method for monitoring and controlling hyposynchronous oscillation of synthesis power generating plant and electric network information Download PDFInfo
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Abstract
The invention relates to a safety monitoring measure of sub-synchronous oscillation/resonance (SSO/SSR) in an electric power system, and discloses a sub-synchronous oscillation multi-level monitoring method of identifying the sub-synchronous oscillation and adopting control and protective measures by a power plant side in coordination with a power grid side. The method comprises the following steps: arranging a unit shafting torsional stress relay (TSR) and a bypass controller in the power plant and the power grid; adequately utilizing the characteristic that the TSR has the highest sensitivity of detecting the sub-synchronous oscillation; identifying different stages of the sub-synchronous oscillation by the TSR setting; adopting different measures including a power plant side warning, bypass serial compensation capacitor or other power electronic devices on the power grid side and removing a set from the power plant according to the different stages of the sub-synchronous oscillation. The method can smartly and accurately identify the sub-synchronous oscillation in the power plant and the power grid, determine the corresponding strategy and measures according to the extent of damage of the sub-synchronous oscillation, and provide an effective method for the power plant and the power grid to harmoniously monitor the sub-synchronous oscillation.
Description
Technical field
The present invention relates to electric power system, large-size thermal power plant, string benefit transmission of electricity, direct current transportation and electric power system power electronic technology application, with the relevant power domain of subsynchronous oscillation of electrical power system (SSO/SSR).
Background technology
Large-scale firepower Steam Turbine technology is one of key equipment of the great equipment of China, the axle cording of high-power unit has the feature of light flexible, multi-support, big span, high power density, generator material use coefficient improves, axle is that the cross section power density increases relatively, the lengthening of axle system descends torsional rigidity, the natural frequency of shafting spectrum is closeer relatively, and the energy of induced vibration is lower; The superhigh pressure long distance power transmission of electric power system simultaneously adopts serial compensation capacitance to improve transmitting capacity of the electric wire netting in a large number, and the application of the power transmission and distribution of novel employing power electronic element and control technology, these electrical network new technologies may cause producing subsynchronous resonance (SSR) or sub-synchronous oscillation (SSO), this paper is referred to as sub-synchronous oscillation (SSO/SSR), may cause generating set that serious torsional oscillation takes place, until the shaft system of unit fracture, the safe operation to electric power system simultaneously also brings harm.
For slight sub-synchronous oscillation, owing to not injury of generating set, can pass through Realtime Alerts, remind the operation people's will to note and analyze the reason of generation sub-synchronous oscillation.Calm down sub-synchronous oscillation for serial compensation capacitance or other power electronic equipment that causes sub-synchronous oscillation that will can excise grid side to the serious sub-synchronous oscillation of unit or the destructive harm of electrical network generation; when the machinery harm of generating set receives that sub-synchronous oscillation causes axle system, can pass through shafting torsional oscillation protecting equipment (TSR) action excision unit, thereby protect the generating set safe operation.Generator unit shaft system torsional oscillation protection (TSR) device is a kind of by detecting the torsional oscillation mode of generator unit shaft system in real time; and then the extent of injury at reference axis system each dangerous interface when torsional oscillation takes place, can before axle system is destroyed, send and report to the police or the automatics of trip signal.
The mechanism complexity that sub-synchronous oscillation (SSO/SSR) takes place, and performance is very hidden, and detecting sub-synchronous oscillation is whether important, a urgent and huge job of difficulty.Generation current factory and operation of power networks department still lack the technological means that detects sub-synchronous oscillation, and this patent provides the measure and the method for the multilevel monitor sub-synchronous oscillation of a kind of combined power generation plant control centre and grid control centre.
Summary of the invention
Because high power station point needs very big electric power transmission capacity to net to power system power supply, on transmission line, adopt serial compensation capacitance technology or controlled series compensation capacitance technology more and more to be used.Jumbo in addition power electronic equipment can improve the control and the operation level of electric power system, and these new technologies all cause the system that the sends generation sub-synchronous oscillation or the subsynchronous resonance in power plant, and then harm generating set and safe operation of electric network.
The sub-synchronous oscillation of electrical network or subsynchronous resonance will excite on the shaft system of unit in power plant and the relevant shafting torsional oscillation of generating set machinery natural frequency, and the vibration ability of sub-synchronous oscillation or subsynchronous resonance shows as the mutual conversion of mechanical energy, electrical energy in generating set.Detecting the sensitiveest position of sub-synchronous oscillation is generator unit shaft system, owing to the energy of sub-synchronous oscillation is compared very little, therefore very low in the sensitivity of grid side detection sub-synchronous oscillation with the power frequency energy of electric power system.
When detecting when more serious sub-synchronous oscillation has taken place, report to the police for the operations staff of power plant, electrical network, also can excise grid side such as serial compensation capacitance by automatics and cause the equipment of sub-synchronous oscillation or the generating set in excision power plant.The sensitiveest position of identification sub-synchronous oscillation (generating set torsional oscillation) is the power plant; and suppress or the measure of eliminating sub-synchronous oscillation may detect sub-synchronous oscillation under-sensitive grid side, have only that power plant and grid side are united is monitoring and the protection that a monitoring and the total system of controlling sub-synchronous oscillation could effectively realize the power plant is sent the sub-synchronous oscillation of system.
The present invention adopts following technical scheme:
A kind of multistage detection of power plant and electrical network sub-synchronous oscillation information and method of control sub-synchronous oscillation of fully utilizing, this method is at power plant installing shaft system of unit torsional oscillation protecting equipment (TSR), at grid side installing bypass controller, utilize shaft system of unit torsional oscillation protecting equipment (TSR) to have the sensitivity of the highest detection sub-synchronous oscillation, by shaft system of unit torsional oscillation protecting equipment (TSR) adjust and electrical network sub-synchronous oscillation information realize to the shaft system of unit torsional oscillation order of severity and described synchronously or the identification of the different stages of development of sub-synchronous oscillation, realize multistage warning and multistage tripping operation; This method may further comprise the steps:
1) sends in the system in the power plant that may produce sub-synchronous oscillation (SSO) or subsynchronous resonance (SSR), each unit installing shaft system of unit torsional oscillation protecting equipment (TSR) in the power plant, the described shaft system of unit torsional oscillation protecting equipment (TSR) of adjusting detects each shaft system of unit torsional oscillation in power plant in real time;
2), be used for the serial compensation capacitance installed on bypass or the excision electrical network or other may cause the power electronic equipment of synchronized oscillation (SSO) or subsynchronous resonance (SSR) at grid side installing bypass controller;
3) described shafting torsional oscillation protecting equipment (TSR), bypass controller and grid dispatching center realize communication by communication port, and described shafting torsional oscillation protecting equipment (TSR) also links to each other with the power plant master-control room;
4) described shafting torsional oscillation protecting equipment (TSR) is according to the shaft system of unit torsional oscillation that is detected be arranged on setting value in the described shafting torsional oscillation protecting equipment (TSR) and differentiate the order of severity of described shaft system of unit torsional oscillation and send first alarm signal respectively, send second alarm signal and start bypass controller identification electrical network simultaneously whether synchronized oscillation (SSO) or subsynchronous resonance (SSR) take place;
5) described shafting torsional oscillation protecting equipment (TSR) is according to the shaft system of unit torsional oscillation that detects be arranged on setting valve in the described shafting torsional oscillation protecting equipment (TSR) and recognition result that whether described bypass controller synchronized oscillation (SSO) or subsynchronous resonance (SSR) take place electrical network; Judge the order of severity of shaft system of unit torsional oscillation and the different phase of synchronized vibration (SSO) or subsynchronous resonance (SSR), be used for unit is excised from electrical network in order to the serial compensation capacitance installed on bypass or the excision electrical network or other power electronic equipment that may cause synchronized oscillation (SSO) or subsynchronous resonance (SSR) and second trip signal thereby send first trip signal.
Technical scheme of the present invention can identify power plant and electrical network generation sub-synchronous oscillation sensitive, exactly, can determine countermeasure and measure according to the extent of injury of sub-synchronous oscillation, for power plant and electric network coordination monitoring sub-synchronous oscillation provides effective method.
Description of drawings
Fig. 1 has illustrated the double back transmission line of power plant through serial compensation capacitance is arranged that be made of many large turbo-type generator groups system wiring figure to mains supply, generating set is made of 4 lumped mass pieces and 3 sections axles, and serial compensation capacitance causes electric power system generation subsynchronous resonance;
Fig. 2 has illustrated the input signal and the output signal of shafting torsional oscillation protecting equipment (TSR) of generating set, comprises 2 alarm signals and 2 trip signals of sensor signal and output;
Fig. 3 has illustrated to be positioned at the input and output signal of bypass controller that serial compensation capacitance or other cause the power electronic equipment place transformer station of SSO/SSR;
Fig. 4 has illustrated the torsional oscillation mode component of generator unit stator, rotor rotation process rotor (axle system) to produce subsynchronous electric component f in electronics
e
Embodiment
Below with reference to Figure of description, and by preferred embodiment to the further detailed presentations of technical scheme of the present invention.
Fig. 1 has illustrated the double back transmission line of power plant through serial compensation capacitance is arranged that be made of 4 the large turbo-type generator groups system wiring figure to mains supply, generating set is made of 4 lumped mass pieces and 3 sections axles, and serial compensation capacitance or other power equipment of grid side installing have caused electric power system generation subsynchronous resonance.Therefore; as shown in Figure 1; each unit installing generator unit shaft system torsional oscillation protecting equipment (TSR) in the power plant; in may causing the transformer station of power electronic equipment of SSO/SSR, grid side installing serial compensation capacitance or other install bypass controller; generator unit shaft system torsional oscillation protecting equipment (TSR) is connected by communication channel with bypass controller that is installed in grid side and grid dispatching center; make full use of the sensitivity that TSR has the highest detection sub-synchronous oscillation; the identification of realization of adjusting by TSR to the sub-synchronous oscillation different stages of development; take different control measure according to the sub-synchronous oscillation different phase, comprise the Power Plant Side warning; grid side bypass serial compensation capacitance or other power electronic equipment (comprise controlled series compensation TCSC; Static Var Compensator SVC etc.); power plant's excision unit.
The wiring of TSR is referring to Fig. 2, it is the tach signal of a side that TSR gathers axle, can install redundant speed probe, TSR can selectivity gathers the current and voltage signals (obtaining by voltage transformer pt, current transformer CT) of generator end, and TSR exports following signal: to warning 1 signal of unit DCS system alarm; To grid dispatching center and installing string benefit or other warning 2 signals that may cause the transformer station of the power electronic equipment of SSO/SSR to report to the police; Drive tripping operation 1 signal of grid side bypass controller bypass serial compensation capacitance or other power electronic equipment; Excise tripping operation 2 signals of this generating set.
In described shafting torsional oscillation protecting equipment TSR, set four setting values that increase gradually, when the shaft system of unit torsional oscillation that is detected as shafting torsional oscillation protecting equipment TSR reaches first setting value that sets, judge that shafting torsional oscillation has taken place described unit, described shafting torsional oscillation protecting equipment TSR sends 1 signal of reporting to the police to power plant control system DCS;
When the shaft system of unit torsional oscillation that is detected as shafting torsional oscillation protecting equipment TSR reaches second setting value that sets; judge that comparatively serious shafting torsional oscillation has taken place described unit; described shafting torsional oscillation protecting equipment TSR sends 2 signals of reporting to the police to the bypass controller of grid dispatching center and grid side; start described bypass controller identification simultaneously and judge whether electrical network synchronized oscillation SSO or subsynchronous resonance SSR take place, and will the most serious torsional oscillation mode frequency f
tInform bypass controller by communication;
The shaft system of unit torsional oscillation that is detected as shafting torsional oscillation protecting equipment TSR reaches the 3rd setting value that sets, and when described bypass controller confirms that electrical network exists synchronized oscillation SSO or subsynchronous resonance SSR, judge that described shaft system of unit torsional oscillation is very serious, described shafting torsional oscillation protecting equipment TSR sends tripping operation 1 order to bypass controller, and excision or bypass are installed in the serial compensation capacitance of grid side and other may cause the power electronic equipment of synchronized vibration SSO or subsynchronous resonance SSR;
When the shaft system of unit torsional oscillation that is detected as shafting torsional oscillation protecting equipment TSR reaches the 4th setting value that sets; judge that described shaft system of unit torsional oscillation or synchronized vibration SSO or subsynchronous resonance SSR are seriously to jeopardizing generating set safety; described shafting torsional oscillation protecting equipment TSR sends tripping operation 2 orders to power plant's master-control room, and this unit is excised from electrical network.
The bypass controller wiring of grid side as shown in Figure 3.Alarm signal and trip signal that the bypass controller input TSR of power plant sends by communication port are gathered the current signal of grid side simultaneously in transformer station; Bypass controller output bypass string is mended or the bypass combined floodgate of other power electronic equipment is ordered.
The sensitiveest position of identification SSO/SSR is the shaft system of unit torsional vibration signals in power plant, and promptly TSR is the torsional oscillation of the unit mode signal that speed probe is measured and calculated by axle.The current signal of grid side also is the useful signal of identification SSO/SSR, but sensitivity is relatively poor, has only when SSO/SSR is serious just may measure.Utilize subsynchronous current signal in the detection of grid side electric current as differentiating the necessary condition that SSO/SSR takes place electrical network in the technical scheme disclosed by the invention, sub-synchronous oscillation component signal in the current signal of grid side is used for verifying warning 2 signals that TSR sends, the reliability of tripping operation 1 signal, i.e. the torsional oscillation of the unit frequency addition of frequency and TSR calculating of calculating the subsynchronous current component of grid side by bypass controller equals 50Hz and judges whether electrical network sub-synchronous oscillation really takes place.
As shown in Figure 4, the left figure of Fig. 4 has illustrated that rotor (axle system) is power frequency f
0=50Hz produces power frequency f in stator
0The electric parameters of=50Hz; Right figure has illustrated that rotor (axle system) is at power frequency f
0When (nominal situation), torsional oscillation, the torsional vibration frequency that superposeed f take place in axle system during the rotating speed of=50Hz
1, f
1In the scope of 2Hz～48Hz, generator unit stator produces the electric component f of subsynchronous frequency
e, f
e+ f
1=50Hz.
The definite value of adjusting in the TSR of generating set device is as follows: adjusting of warning 1 need have higher identification sensitivity, the shafting torsional oscillation amplitude that causes when avoiding the normal unit same period or off-the-line is exceeded, the axle that 1 definite value of reporting to the police is got measurement is that speed discrepancy signal dW is greater than 0.1rad/s, and dW produce in axle system less than the torsional oscillation dominant mode critical fatigue the torsional oscillation amplitude 1/4, dominant mode refers to the mode that torsional oscillation is the most serious; Adjusting of warning 2 is comparatively strict, and producing milli machine fatigue with unit is critical value, and adjusting of warning 2 is tired between 0.1%～0.5% with a system of calculating under the single disturbance; Tripping operation 1 is adjusted and is reached 0.5%～1% with the generator unit shaft system fatigue of calculating under the single disturbance; Tripping operation 2 is adjusted and is reached 1.0%～5.0% with the generator unit shaft system fatigue of calculating under the single disturbance.
When sending to bypass controller, TSR reports to the police 2 the time, be that dominant mode (frequency) is given bypass controller by communication simultaneously with the most serious torsional oscillation mode (frequency), bypass controller calculate whether exist in the grid side electric current with TSR on the torsional oscillation mode that send by the subsynchronous current component of 50Hz complementation.With this block signal that goes bypass to close a floodgate as tripping operation 1 signal of receiving TSR.
With domestic certain 2 * 500MW+2 of power plant * 600MW turbo generator set is example, and grid side is being sent transformer station's installing serial compensation capacitance of system.The 500MW unit has 4 torsional oscillation modes, is respectively 14.8Hz, 28.0Hz, 30.9Hz, 35.6Hz, and the 600MW unit has 3 torsional oscillation modes, is respectively 12.6Hz, 21.3Hz, 25.1Hz.At the TSR of dualization of generating set device device, model C SC-812P.Mend place transformer station at string bypass controller is set.The setting value of TSR is as follows: warning 1 is made as dW greater than 0.2rad/s; Warning 2 is made as dW greater than 0.7rad/s; Tripping operation 1 is made as tired greater than 0.5%; Tripping operation 2 is made as tired greater than 2.0%.Dominant mode is the torsional oscillation of 21.3Hz, and the frequency of grid side sub-synchronous oscillation electric current is 28.7Hz.The level that the sub-synchronous oscillation of this system is monitored is:
1) system's generation sub-synchronous oscillation (SSO/SSR) is sent in the power plant;
2) TSR detection axle is a tach signal, calculates dW, transmits messages alert 1 to power plant's master-control room warning;
3) TSR detection axle is a tach signal, calculates dW, transmits messages alert 2 to grid dispatching center and transformer station's bypass controller, and it is 21.3Hz that the dominant mode of bypass controller Power Plant is given in communication simultaneously;
4) bypass controller calculates the subsynchronous current component that there is 28.7Hz in the grid side electric current from the current signal that the CT of transformer station measures;
5) TSR detection axle is a tach signal, calculates dW and fatigue, sends out tripping operation 1 to the grid side bypass controller;
6) bypass controller is received tripping operation 1 signal of TSR, has confirmed that there is the subsynchronous current component of 28.7Hz in grid side, the order of bypass controller output combined floodgate bypass breaker, bypass serial compensation capacitance;
7) sub-synchronous oscillation begins decay after the serial compensation capacitance bypass;
8) possibility 1:SSO/SSR decays fast, and it is tach signal that TSR detects axle, and it is tired with axle system to calculate dW, monitors SSO/SSR and decays fast, and axle is that fatigue does not reach 2 definite values that trip, and unit is not excised by TSR;
9) possibility 2:SSO/SSR slowly decays, and it is tach signal that TSR detects axle, and it is tired with axle system to calculate dW, monitor SSO/SSR and slowly decay, but axle is that fatigue is also in continuous increase, until reaching the 2 action definite values that trip, this generating set of TSR action excision.
The preferred embodiment that more than provides and the setting range of definite value be in order to illustrating technical scheme of the present invention, and therefore make those skilled in the art can make and use the present invention.But this only is a preferred embodiment, be not that the present invention is done any pro forma restriction, any one professional and technical personnel is in the scope that does not depart from technical solution of the present invention, and above technology of foundation and method do certain modification and the equivalent embodiment that is considered as equivalent variations is worked as in change.
Claims (9)
1, a kind of multistage detection of power plant and electrical network sub-synchronous oscillation information and method of control sub-synchronous oscillation of fully utilizing, this method is at power plant installing shaft system of unit torsional oscillation protecting equipment (TSR), at grid side installing bypass controller, utilize shaft system of unit torsional oscillation protecting equipment (TSR) to have the sensitivity of the highest detection sub-synchronous oscillation, by shaft system of unit torsional oscillation protecting equipment (TSR) adjust and electrical network sub-synchronous oscillation information realize to the shaft system of unit torsional oscillation order of severity and to described synchronously or the identification of the different stages of development of sub-synchronous oscillation, realize multistage warning and multistage tripping operation; This method may further comprise the steps:
1) sends in the system in the power plant that may produce sub-synchronous oscillation (SSO) or subsynchronous resonance (SSR), each unit installing shaft system of unit torsional oscillation protecting equipment (TSR) in the power plant, the described shaft system of unit torsional oscillation protecting equipment (TSR) of adjusting detects each shaft system of unit torsional oscillation in power plant in real time; The TSR device of adjusting is multistage warning and multistage tripping operation, wherein:
2), be used for the serial compensation capacitance (comprising controlled series compensation electric capacity TCSC) installed on bypass or the excision electrical network or other may cause the power electronic equipment of synchronized vibration (SSO) or subsynchronous resonance (SSR) at grid side installing bypass controller;
3) described shaft system of unit torsional oscillation protecting equipment (TSR), bypass controller and grid dispatching center realize communication by communication port, and described shaft system of unit torsional oscillation protecting equipment (TSR) also links to each other with the power plant master-control room;
4) described shaft system of unit torsional oscillation protecting equipment (TSR) is according to the shaft system of unit torsional oscillation that is detected be arranged on setting value in the described shafting torsional oscillation protecting equipment (TSR) and differentiate the order of severity of described shaft system of unit torsional oscillation and send first alarm signal respectively, send second alarm signal and start bypass controller identification electrical network whether synchronized oscillation (SSO) or subsynchronous resonance (SSR) take place;
5) described shaft system of unit torsional oscillation protecting equipment (TSR) is according to the shaft system of unit torsional oscillation that is detected be arranged on setting value in the described shafting torsional oscillation protecting equipment (TSR) and recognition result that whether described bypass controller synchronized oscillation (SSO) or subsynchronous resonance (SSR) take place electrical network; judge the order of severity of shaft system of unit torsional oscillation and synchronized vibration (SSO) or subsynchronous resonance (SSR); thereby send serial compensation capacitance that first trip signal installs on the electrical network in order to bypass or excision or other may cause the power electronic equipment of synchronized oscillation (SSO) or subsynchronous resonance (SSR), and second trip signal is used for unit is excised from electrical network.
2, the method for multistage detection according to claim 1 and control sub-synchronous oscillation is characterized by:
In described shafting torsional oscillation protecting equipment (TSR), set four setting values that increase gradually;
When the shaft system of unit torsional oscillation that is detected when shafting torsional oscillation protecting equipment (TSR) reaches first setting value that sets, judge that shafting torsional oscillation has taken place described unit, described shafting torsional oscillation protecting equipment (TSR) sends first alarm signal to power plant control system (DCS);
When the shaft system of unit torsional oscillation that is detected when shafting torsional oscillation protecting equipment (TSR) reaches second setting value that sets; judge that comparatively serious shafting torsional oscillation has taken place described unit; described shafting torsional oscillation protecting equipment (TSR) sends second alarm signal to the bypass controller of grid dispatching center and grid side; start described bypass controller identification simultaneously and judge whether electrical network synchronized oscillation (SSO) or subsynchronous resonance (SSR) take place, and will the most serious torsional oscillation mode frequency f
tInform bypass controller by communication;
The shaft system of unit torsional oscillation that is detected when shafting torsional oscillation protecting equipment (TSR) reaches the 3rd setting value that sets, and when described bypass controller confirms that electrical network exists synchronized oscillation (SSO) or subsynchronous resonance (SSR), judge that described shaft system of unit torsional oscillation is very serious, described shafting torsional oscillation protecting equipment (TSR) sends first order trip signal to bypass controller, and excision or bypass are installed in the serial compensation capacitance of grid side and other may cause the power electronic equipment of synchronized vibration (SSO) or subsynchronous resonance (SSR); When the shaft system of unit torsional oscillation that is detected when shafting torsional oscillation protecting equipment (TSR) reaches the 4th setting value that sets; judge that described shaft system of unit torsional oscillation or synchronized vibration (SSO) or subsynchronous resonance (SSR) are seriously to jeopardizing generating set safety; described shafting torsional oscillation protecting equipment (TSR) sends second level trip signal to power plant's master-control room, and this unit is excised from electrical network.
3, the method for multistage detection according to claim 2 and control sub-synchronous oscillation is characterized by:
The shafting torsional oscillation amplitude that described first setting value causes when avoiding the normal unit same period or off-the-line is exceeded; the span of first setting value is; the axle of measuring be speed discrepancy signal dW greater than 0.1rad/s, and dW produce in axle system less than the torsional oscillation dominant mode critical fatigue the torsional oscillation amplitude 1/4.
4, the method for multistage detection according to claim 2 and control sub-synchronous oscillation is characterized by:
It is critical value that described second setting value produces milli machine fatigue with unit, and the span of second setting value is that the axle system under the single disturbance is tired between 0.1%～0.5%.
5, according to the method for multistage detection according to claim 2 and control sub-synchronous oscillation, it is characterized by:
The span of described the 3rd setting value is that the generator unit shaft system fatigue under the single disturbance reaches 0.5%～1%.
6, the method for multistage detection according to claim 2 and control sub-synchronous oscillation is characterized by:
The span of described the 4th setting value is that the generator unit shaft system fatigue under the single disturbance reaches 1.0%～5.0%.
7, the method for multistage detection according to claim 1 and 2 and control sub-synchronous oscillation is characterized by:
After described bypass controller is received second alarm signal, the most serious model frequency f that sends according to shafting torsional oscillation protecting equipment (TSR)
tCalculate in the grid line electric current and whether have the electric mode f of sub-synchronous oscillation
e, f wherein
t+ f
e=50Hz, promptly the electric mode of the torsional oscillation mode of generating set and electrical network is at the 50Hz complementation, by the control device of grid side by detecting and torsional oscillation of the unit model frequency f
tComplementary frequency is f
eSubsynchronous electric current whether exist and confirm whether electrical network synchronized oscillation (SSO) or subsynchronous resonance (SSR) take place.
8, the method for multistage detection according to claim 1 and 2 and control sub-synchronous oscillation is characterized by:
Send second trip signal by shafting torsional oscillation protecting equipment (TSR) to the bypass controller of grid side; by bypass controller excision serial compensation capacitance (comprising controlled series compensation TCSC) or other power electronic equipment; as Static Var Compensator SVC etc., eliminate or suppress synchronized vibration (SSO) or subsynchronous resonance (SSR).
9, according to the method for claim 1 or 8 described multistage detections and control sub-synchronous oscillation, it is characterized by:
Described other power electronic equipment comprises controlled series compensation TCSC, Static Var Compensator SVC.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101173905A CN101409462B (en) | 2008-07-30 | 2008-07-30 | Multilevel monitor-control method for monitoring and controlling hyposynchronous oscillation of synthesis power generating plant and electric network information |
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|---|---|---|---|
| CN2008101173905A CN101409462B (en) | 2008-07-30 | 2008-07-30 | Multilevel monitor-control method for monitoring and controlling hyposynchronous oscillation of synthesis power generating plant and electric network information |
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| CN101409462A true CN101409462A (en) | 2009-04-15 |
| CN101409462B CN101409462B (en) | 2010-06-16 |
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