CN105226666A - To the check method of reactive apparatus running status in transformer station's automatism voltage control - Google Patents
To the check method of reactive apparatus running status in transformer station's automatism voltage control Download PDFInfo
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Abstract
The present invention relates to the check method to reactive apparatus running status in a kind of transformer station automatism voltage control, belong to electric power system automatism voltage control technical field.The method comprises: first according to the topological structure of current electric grid, forms the control unit of transformer station; Secondly, the metric data according to the reactive apparatus in control unit is checked its running status; First the remote measurement of the capacitor of main transformer low-pressure side, reactor, the consistency of remote signalling are checked; Then to the capacitor of main transformer low-pressure side, the idle remote measurement of reactor and and the idle remote measurement consistency of main transformer low-pressure side check; If there is the automatism voltage control of checking obstructed out-of-date automatic blocking transformer station.The inventive method can carry out the check of running status to transformer station's reactive apparatus in automatism voltage control quickly and accurately, avoids owing to measuring the inaccurate Wrong control caused, meets the requirement of substation equipment safe operation.
Description
Technical field
The invention belongs to electric power system automatism voltage control technical field, the check method particularly to reactive apparatus running status in a kind of transformer station automatism voltage control.
Background technology
Automatism voltage control (AutomaticVoltageControl, hereinafter referred to as AVC) system be realize power grid security (raising voltage stability margin), important means that economic (reduction via net loss), high-quality (raising rate of qualified voltage) are run, its general principle be exerted oneself by cooperation control generator reactive, load tap changer and reactive-load compensation equipment, realize the reasonable layout of reactive voltage in electrical network.
AVC system mainly contains load tap changer and reactive-load compensation equipment for the object of the idle control of transformer station, system is also just divided into the switching instruction of transfer the files instruction and the reactive-load compensation equipment of load tap changer to the control command that transformer station issues, thus the reactive power distribution situation changed in transformer station, thus also reach the object of voltage-regulation.
The supervisory control system of transformer station, be otherwise known as SCADA system, is responsible for the collection of all metric data information in acquisition station.These measurement informations are pooled to supervisory control system, and correspondence is associated with on corresponding equipment, are shown to the ruuning situation that display screen can be used for dispatcher to carry out monitoring transformer station.Simultaneously, these metric data can also be packed and are supplied to other module application to use, such as this control module of AVC just needs the basic data gathered from transformer station when calculating, and its source is not directly gather from the physical device of transformer station, but the metric data of the transformer station obtained in the SCADA system adopted.These data deliver to Surveillance center from transformer station, are called as upstream data.In addition, because AVC is control module, just must have the function of control, namely send instructions to transformer station down, these data are called as downlink data.Equally, the data of AVC directly neither be handed down to transformer station by link, are also forwarded by SCADA system.Generally speaking, one, the direct passage of transformer station and Surveillance center is exactly the collection that SCADA carries out metric data.
The basis of the control of AVC is the basic data based on electrical network, and the operation of electrical network also will follow certain operating standard.In the operating standard of reactive apparatus, do not allow to drop into the capacitor and reactor hanging over same bus simultaneously.This is because capacitor is as capacitive reactive power generating means, and capacitor is as the idle generating means of perception, if carry out input can cause idle unreasonable flowing in transformer station under same bus, thus cause the increase of equipment loss, add the cost of operation; And drop into while capacitor and reactor under same bus, also can form the shunt-resonant circuit under certain subharmonic. cause the amplification of harmonic current or the generation of resonance, thus the damage of equipment can be caused.
How to avoid the capacitor under same bus and reactor to drop into, topmost is exactly the accuracy of metric data simultaneously.It is directly transmit the raw data (remote measurement, remote signalling) of coming up by SCADA that the control module of AVC carries out the data that decision-making adopts, but needs a Pre-Evaluation for the credibility of these data.Filtration module completes such work just.The input of filtration module is that SCADA transmits the raw data of coming up, and the output of filtration module will make a policy for controller module.Filtration module can divide transversely filtering and longitudinal filtering two aspects substantially.The data that what wherein horizontal filtering was paid close attention to is in a section, the mutual restriction relation that should meet between the measuring point that it is different under utilizing synchronization, to the data analysis collected.In essence, this part operation class is similar to a state estimator, difference is it be not the result that will provide through state estimation is how many, but will on the basis of this result, compare with original SCADA data, the raw data of SCADA are assessed, if there is the situation that error is too large, so should think that the measurement system of this local breaks down, now determine according to the character of data fault the switching whether carrying out control model, or carry out shadow shield, provide warning message simultaneously.
The control of AVC is carried out calculating for the data of a section and controls, and therefore in order to avoid the misoperation to equipment, will carry out the horizontal filtering of data.Concerning AVC, reactive apparatus service data is checked, judge that whether the metric data gathered by SCADA is correct, also just seem and be even more important.The group capacitor such as connected under the same bus of transformer station and one group of reactor, the state quantity measurement of the circuit breaker be connected at capacitor is sometime for opening, and the idle measurement of the capacitor collected comparatively large (close to equipment rated capacity), if at this moment AVC only adopts the circuit-breaker status of capacitor to judge the running status of capacitor, then judge that this capacitor is out of service.If busbar voltage is higher at that time, AVC can drop into reactor to reduce busbar voltage.Actual situation may be the state quantity measurement of the circuit breaker that capacitor is connected is wrong, and this capacitor is still in running status.The control of such AVC just causes capacitor and reactor drops into simultaneously, violates equipment operating standard.
The remote measure and communication mistake of capacitor, reactor can cause AVC to equipment state decision error, there will be the situation that capacitor and reactor drop into simultaneously, thus does not meet equipment operating standard and can cause the damage of equipment.So the check method to reactive apparatus running status in a kind of transformer station automatism voltage control of proposing of this patent, its object is exactly utilize the measurement information of redundancy to check the running status of reactive apparatus in transformer station, when occurring abnormal, timely locking controls automatically, avoids the Wrong control situation that mishandling occurs.
The technology forming substation control unit in transformer station's automatism voltage control is related in the present invention, it is 201410637577.3 that the applicant once proposed the number of accepting, name is called the correlation technique of " method generating control unit in automatism voltage control based on topology coloring in real time ", the main contents of the method comprise: the isolating switch of the Transformer Winding in cancellation transformer station and all disconnections, circuit breaker, carry out topology coloring analysis to all the other structures of transformer station; The topological island at the connection end point place of, medium voltage side winding high according to transformer, determines the logic bus that high voltage side of transformer, medium voltage side connect, and creates new control unit according to transformer and logic bus relation, or transformer is added existing control unit; Its low voltage logic bus connected is determined according to the topological island at step down side winding switching end points place, and by low voltage logic bus access control unit; Determine its logic bus connected by the topological island at each reactive-load compensation equipment connection end point place in station, and reactive-load compensation equipment is joined control unit.Employing method can form substation control unit fast, correctly, in the calculating of transformer station's automatism voltage control and decision-making.
Summary of the invention
The object of the invention is the weak point for overcoming prior art, proposing the check method to reactive apparatus running status in a kind of transformer station automatism voltage control.The method utilizes the real-time measurement information of transformer station's content redundancy to check the running status of reactive apparatus in transformer station, the timely locking automatism voltage control when reactive apparatus measures appearance exception, thus avoid the Wrong control situation that mishandling occurs.
To the check method of reactive apparatus running status in transformer station's automatism voltage control, it is characterized in that, comprise the following steps:
1) when control cycle arrives, first obtain the complete topological structure of current transformer substation from grid monitoring system, form the control unit of transformer station with this;
2), after in transformer station, control unit generates, the real-time measurement data according to the reactive apparatus in control unit are checked its running status;
3) verification packet of transformer station's reactive apparatus running status contains the check of two steps, the first step is capacitor to main transformer low-pressure side, the remote measurement of reactor, the consistency of remote signalling are checked, second step is capacitor to main transformer low-pressure side, the idle remote measurement of reactor and and the idle remote measurement consistency of main transformer low-pressure side check;
4) remote measurement of the capacitor of main transformer low-pressure side, reactor, the consistency of remote signalling are checked and comprised the steps:
4.1) setting of upper-lower door threshold value: the minimum value of the ratio of remote measurement value and equipment nominal reactive capacity when upper threshold value refers to that capacitor, reactor arrangement drop under normal circumstances, is designated as fLmt1; When lower threshold value refers to that capacitor, reactor arrangement exit under normal circumstances, the maximum of the ratio of remote measurement value and equipment nominal reactive capacity, is designated as fLmt0;
4.2) idle remote measurement is checked: the rated capacity obtaining capacitor, reactor from electric network model parameter, is designated as fQNom, unit kVar; The real-time measurement of capacitor, reactor, is designated as fQCur, unit kVar, and its absolute value is designated as fabs (fQCur), remembers that the absolute value form of following numerical value is fabs (x); When capacitor, reactor are in running status, if satisfied condition: fabs (fQCur) <fQNom*fLmt1, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding; When electric capacity/anti-device is in non-operating state, if satisfied condition: fabs (fQCur) >fQNom*fLmt0, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding;
4.3) telemetering of current is checked:
4.31) load current value is obtained; The rated current of electric capacity/anti-device is designated as fINom, unit A; From equipment nameplate parameter, obtain capacitor, the nominal reactive capacity of reactor is designated as Q, unit kVar and rated voltage are designated as U, unit kV, and the rated current of calculable capacitor, reactor is: fINom=Q/U;
4.32) real-time measurement of capacitor, reactor current, is designated as ICur, unit A; When capacitor, reactor are in running status, if satisfied condition: fabs (ICur) <fINom*fLmt1, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding; When capacitor, reactor are in non-operating state, if satisfied condition: fabs (ICur) >fINom*fLmt0, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding;
4.4) in step 4.2) and 4.3) idle remote measurement and telemetering of current verification in, if by wherein a kind of judgement define capacitor, reactor remote measure and communication not corresponding, the then automatism voltage control of this transformer station of locking, and provide warning information;
5) capacitor of main transformer low-pressure side, the idle remote measurement of reactor and the conforming check of the idle remote measurement of main transformer low-pressure side are comprised the steps:
5.1) setting of threshold value: the absolute value of the capacitor of main transformer low-pressure side, the idle remote measurement of reactor under normal circumstances and the maximum of getting the ratio of the absolute value after differing from and the idle verification reference value of main transformer low-pressure side of main transformer low-pressure side idle remote measurement absolute value, be designated as fLmt;
5.2) the idle remote measurement value of main transformer low-pressure side, directly obtaining by measuring, being designated as fTrfmVar, unit MVar;
5.3) capacitor of main transformer low-pressure side, the idle remote measurement of reactor, by the topological relation in transformer station, find capacitor, the reactor arrangement on all buses being connected to this main transformer low-pressure side side, and the reactive power measuring value of these equipment is added, draw the idle remote measurement value of main transformer low-voltage side capacitor, reactor, be designated as fCpVar, unit MVar;
5.4) determine to verify reference value, be designated as fTrfmBase, its obtaining value method is: as fabs (fTrfmVar) >fDead, fTrfmBase=fabs (fTrfmVar); As fabs (fTrfmVar) <fDead, fTrfmBase=fDead; FDead is the parameter arranged, and adopts 0.3 ~ 0.5 times of separate unit reactive apparatus capacity, unit MVar;
5.5) absolute value is checked; If satisfy condition:
fabs(fabs(fTrfmVar)-fabs(fCpVar))>fLmt*fTrfmBase
Then think the capacitor of main transformer low-pressure side, the idle remote measurement of reactor and inconsistent with the idle remote measurement of main transformer low-pressure side;
5.5) direction is checked; If fabs (fTrfmVar) >fDead, further travel direction is checked; Note capacitor for just, is just during main transformer low-pressure side is idle inflow main transformer when sending idle; If fTrfmVar*fCpVar<0, namely the idle measuring value of main transformer low-pressure side is different from electric capacity/total reactive sign of anti-device, then the capacitor of main transformer low-pressure side, the idle remote measurement of reactor and inconsistent with the idle remote measurement of main transformer low-pressure side;
5.6) by above-mentioned 5.4) and 5.5) in the verification of the absolute value School Affairs direction of two steps, if there is a kind of situation that the capacitor of main transformer low-pressure side, the idle remote measurement of reactor and inconsistent with the idle remote measurement of main transformer low-pressure side are described, the then automatism voltage control of this transformer station of locking, and provide warning information, ensure that the safe operation of system and equipment;
6) when next round control cycle arrives, go to step 1 continuation again detect and check.
Feature of the present invention and beneficial effect:
The present invention is directed in transformer station's automatism voltage control and the check method of reactive apparatus running status is innovated, take into full account and owing to measuring the situation of the misoperation that mistake causes, thus the solution of problem may have been carried out targetedly in the calculating of automatism voltage control.The damage of the equipment that the misoperation of equipment can be avoided to cause, also can remind the measurement information of dispatching and monitoring personnel to mistake to modify in time, make the strategy of automatism voltage control accurate, also ensures that power grid security runs efficiently simultaneously.
Accompanying drawing explanation
Fig. 1 is method flow diagram of the present invention.
Fig. 2 is the transformer station's embodiment schematic diagram based on application of the present invention.
Embodiment
In a kind of transformer station automatism voltage control that the present invention proposes to the check method of reactive apparatus running status by reference to the accompanying drawings and a specific embodiment, more clearly demonstrate the flow process of this method, first the model of embodiment simply described:
Without loss of generality, only for a 500kV transformer station main transformer in the present embodiment, its structure as shown in Figure 1, this main transformer is designated as T1, it is a three-winding transformer, three electric pressures that side connects are followed successively by high-pressure side 500kV, medium voltage side 220kV, low-pressure side 35kV, the wherein condenser capacity C1=60MVar that connects of T1 low-pressure side, reactor L1=40MVar, switch mark black bars representation switch in figure is in closure state, switch mark white square represents open mode, and the capacitive reactive power flowed into high-pressure side with low-pressure side is reference direction.
The present embodiment method comprises the following steps:
1) when control cycle arrives, first the complete topological structure of current transformer substation is obtained from grid monitoring system, the control unit (method of the generation of the control unit of transformer station can adopt the patent No. for 201410637577.3, the generation method of the substation control unit described during name is called " generating the method for control unit in automatism voltage control based on topology coloring in real time ") of transformer station is formed with this.Control cycle is decided to be 5 minutes in this example, because this transformer station only has a main transformer, and the killer switch of main transformer three side is all in closure state, according to the method generating control unit in automatism voltage control based on topology coloring in real time, a control unit U1 can be formed.Equipment is comprised: 500kV bus, 220kV bus, 35kV bus, transformer T1, reactive apparatus C1, L1 in U1.
2), after in transformer station, control unit generates, the real-time measurement data according to the reactive apparatus in control unit are checked its running status;
3) verification packet of transformer station's reactive apparatus running status contains the check of two steps, the first step is capacitor to main transformer low-pressure side, the remote measurement of reactor, the consistency of remote signalling are checked, second step is capacitor to main transformer low-pressure side, the idle remote measurement of reactor and and the idle remote measurement consistency of main transformer low-pressure side check;
4) remote measurement of the capacitor of main transformer low-pressure side, reactor, the consistency of remote signalling are checked and comprised the steps:
4.1) setting of upper-lower door threshold value: the minimum value of the ratio of remote measurement value and equipment nominal reactive capacity when upper threshold value refers to that capacitor, reactor arrangement drop under normal circumstances, is designated as fLmt1; When lower threshold value refers to that capacitor, reactor arrangement exit under normal circumstances, the maximum of the ratio of remote measurement value and equipment nominal reactive capacity, is designated as fLmt0;
Upper-lower door threshold value carries out artificial setting according to specific circumstances, also has respective scope under normal circumstances, upper threshold value general satisfaction condition 0.6<=fLmt1<=0.9; Lower threshold value general satisfaction condition 0.1<=fLmt0<=0.3.In this example, we arrange threshold value fLmt1 is 0.8, and lower threshold value is 0.2.
4.2) idle remote measurement is checked: the rated capacity obtaining capacitor, reactor from electric network model parameter, is designated as fQNom, unit kVar; The real-time measurement of capacitor, reactor, is designated as fQCur, unit kVar, and its absolute value is designated as fabs (fQCur), remembers that the absolute value form of following numerical value is fabs (x); When capacitor, reactor are in running status, if satisfied condition: fabs (fQCur) <fQNom*fLmt1, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding; When capacitor, reactor are in non-operating state, if satisfied condition: fabs (fQCur) >fQNom*fLmt0, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding;
To capacitor C1, rated capacity is 60MVar, the absolute value that reactive power measures is 5MVar, the circuit breaker be connected with C1 is in off-state, therefore C1 is in non-operating state, lower threshold value fLmt0 is 0.2, therefore needs to judge 5>60*0.2, namely 5>12 does not meet, then illustrate that C1 capacitive reactance device is consistent by idle method of telemetering check remote measure and communication.
To reactor L1, rated capacity is 40MVar, the absolute value that reactive power measures is 28Mvar, the circuit breaker be connected with L1 is in closure state, therefore L1 is in running status, upper threshold value fLmt1 is 0.8, therefore needs to judge 28<40*0.8, namely 28<32 satisfies condition, then illustrate that reactor L1 remote measure and communication is not corresponding.
4.3) telemetering of current is checked:
4.31) load current value is obtained; The rated current of electric capacity/anti-device is designated as fINom, unit A; From equipment nameplate parameter, obtain capacitor, the nominal reactive capacity of reactor is designated as Q, unit kVar and rated voltage are designated as U, unit kV, and the rated current of calculable capacitor, reactor is: fINom=Q/U;
Capacitor C1, rated current I
c=60*1000/38.5*1.732=900A;
Reactor L1, rated current I
l=40*1000/38.5*1.732=600A;
4.32) real-time measurement of capacitor, reactor current, is designated as ICur, unit A; When capacitor, reactor are in running status, if satisfied condition: fabs (ICur) <fINom*fLmt1, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding; When capacitor, reactor are in non-operating state, if satisfied condition: fabs (ICur) >fINom*fLmt0, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding;
Capacitor C1, the circuit breaker be attached thereto is in off-state, therefore C1 is in non-operating state, the real-time measurement value of electric current is 10A, condition criterion formula 10>900*0.8, i.e. 10>720, do not meet this condition obviously, illustrate that C1 remote measure and communication is corresponding.
Reactor L1, the circuit breaker be attached thereto is in closure state, therefore L1 is in running status, the real-time measurement value of electric current is 420A, condition criterion formula 420<600*0.8, i.e. 420<480, meet this condition obviously, illustrate that L1 remote measure and communication is not corresponding.
4.4) in above-mentioned steps 4.2) and 4.3) idle remote measurement and telemetering of current verification in, as long as by wherein a kind of judgement define capacitor, reactor remote measure and communication not corresponding, the i.e. automatism voltage control of this transformer station of locking, and provide warning information;
5) capacitor of main transformer low-pressure side, the idle remote measurement of reactor and the conforming check of the idle remote measurement of main transformer low-pressure side are comprised the steps:
5.1) setting of threshold value: refer to the absolute value of the idle remote measurement of the capacitor of main transformer low-pressure side under normal circumstances, reactor and the maximum of getting the ratio of the absolute value after differing from and the idle verification reference value of main transformer low-pressure side of main transformer low-pressure side idle remote measurement absolute value, be designated as fLmt;
Threshold value carries out artificial setting according to specific circumstances, also its scope is had under normal circumstances, threshold value general satisfaction condition 0.1<=fLmt1<=0.3, in this example, we arrange threshold value fLmt1 is 0.2.
5.2) the idle remote measurement value of main transformer low-pressure side, directly obtaining by measuring, being designated as fTrfmVar, unit MVar;
The idle measurement of low-pressure side of main transformer T1 is fTrfmVar=-38MVar.
5.3) capacitor of main transformer low-pressure side, the idle remote measurement of reactor, by the topological relation in transformer station, find capacitor, the reactor arrangement on all buses being connected to this main transformer low-pressure side side, and the reactive power measuring value of these equipment is added, draw the idle remote measurement value of main transformer low-voltage side capacitor, reactor, be designated as fCpVar, unit MVar;
The idle measurement of capacitor C1 is 5MVar, and the idle measurement of reactor L1 is-28Mvar, therefore fCpVar=5-28=-23MVar.
5.4) determine to verify reference value, be designated as fTrfmBase, its obtaining value method is: as fabs (fTrfmVar) >fDead, fTrfmBase=fabs (fTrfmVar); As fabs (fTrfmVar) <fDead, fTrfmBase=fDead; FDead is the parameter arranged, and adopts 0.3 ~ 0.5 times of separate unit reactive apparatus capacity, unit MVar;
In this example, the reactive apparatus of the low-pressure side of main transformer T1 always has two, capacitor C1 and capacitor L1, capacity is respectively 60MVar and 40MVar, the capacity that fDead is the low capacity reactive apparatus of 0.5 times can be set in this example, then fDead=40*0.5=20MVar, due to fabs (fTrfmVar)=38>20, then arranges fTrfmBase=fabs (fTrfmVar)=38MVar.
5.5) absolute value is checked; If satisfy condition:
fabs(fabs(fTrfmVar)-fabs(fCpVar))>fLmt*fTrfmBase
Then think the capacitor of main transformer low-pressure side, the idle remote measurement of reactor and inconsistent with the idle remote measurement of main transformer low-pressure side;
In this example, fabs (38-23) >0.2*38, i.e. 15>7.6, meet this condition, then illustrate the idle remote measurement of capacitor of main transformer T1 low-pressure side and the idle remote measurement of main transformer low-pressure side inconsistent.
5.5) direction is checked; If fabs (fTrfmVar) >fDead, further travel direction is checked; Note capacitor for just, is just during main transformer low-pressure side is idle inflow main transformer when sending idle; If fTrfmVar*fCpVar<0, namely the idle measuring value of main transformer low-pressure side is different from electric capacity/total reactive sign of anti-device, then the capacitor of main transformer low-pressure side, the idle remote measurement of reactor and inconsistent with the idle remote measurement of main transformer low-pressure side;
In this example, for condition fabs (fTrfmVar) >fDead, 38>20, therefore further travel direction is wanted to check.38* (-23)=-874<0, the symbol that namely the idle measurement of main transformer T1 low-pressure side is always idle from electric capacity/anti-device is different, illustrate the idle remote measurement of capacitor of main transformer T1 low-pressure side and the idle remote measurement of main transformer low-pressure side inconsistent.
5.6) by above-mentioned 5.4) and 5.5) in the verification of the absolute value School Affairs direction of two steps, as long as there is a kind of situation that the capacitor of main transformer low-pressure side, the idle remote measurement of reactor and inconsistent with the idle remote measurement of main transformer low-pressure side are described, the i.e. automatism voltage control of this transformer station of locking, and provide warning information, ensure that the safe operation of system and equipment;
In this example, the remote measurement of reactor L1 and remote signalling are not corresponding, and the capacitor of main transformer T1 low-pressure side, the idle remote measurement of reactor and inconsistent with the idle remote measurement of main transformer low-pressure side, therefore want the control unit U1 belonging to locking.
6) when next round control cycle arrives, go to step 1 continuation again detect and check.
Claims (1)
1. the check method to reactive apparatus running status in transformer station's automatism voltage control, is characterized in that, comprise the following steps:
1) when control cycle arrives, first obtain the complete topological structure of current transformer substation from grid monitoring system, form the control unit of transformer station with this;
2), after in transformer station, control unit generates, the real-time measurement data according to the reactive apparatus in control unit are checked its running status;
3) verification packet of transformer station's reactive apparatus running status contains the check of two steps, the first step is capacitor to main transformer low-pressure side, the remote measurement of reactor, the consistency of remote signalling are checked, second step is capacitor to main transformer low-pressure side, the idle remote measurement of reactor and and the idle remote measurement consistency of main transformer low-pressure side check;
4) remote measurement of the capacitor of main transformer low-pressure side, reactor, the consistency of remote signalling are checked and comprised the steps:
4.1) setting of upper-lower door threshold value: the minimum value of the ratio of remote measurement value and equipment nominal reactive capacity when upper threshold value refers to that capacitor, reactor arrangement drop under normal circumstances, is designated as fLmt1; When lower threshold value refers to that capacitor, reactor arrangement exit under normal circumstances, the maximum of the ratio of remote measurement value and equipment nominal reactive capacity, is designated as fLmt0;
4.2) idle remote measurement is checked: the rated capacity obtaining capacitor, reactor from electric network model parameter, is designated as fQNom, unit kVar; The real-time measurement of capacitor, reactor, is designated as fQCur, unit kVar, and its absolute value is designated as fabs (fQCur), remembers that the absolute value form of following numerical value is fabs (x); When capacitor, reactor are in running status, if satisfied condition: fabs (fQCur) <fQNom*fLmt1, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding; When capacitor, reactor are in non-operating state, if satisfied condition: fabs (fQCur) >fQNom*fLmt0, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding;
4.3) telemetering of current is checked:
4.31) load current value is obtained; The rated current of electric capacity/anti-device is designated as fINom, unit A; From equipment nameplate parameter, obtain capacitor, the nominal reactive capacity of reactor is designated as Q, unit kVar and rated voltage are designated as U, unit kV, and the rated current of calculable capacitor, reactor is: fINom=Q/U;
4.32) real-time measurement of capacitor, reactor current, is designated as ICur, unit A; When capacitor, reactor are in running status, if satisfied condition: fabs (ICur) <fINom*fLmt1, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding; When capacitor, reactor are in non-operating state, if satisfied condition: fabs (ICur) >fINom*fLmt0, then illustrate that the remote measure and communication of this capacitor, reactor is not corresponding;
4.4) in step 4.2) and 4.3) idle remote measurement and telemetering of current verification in, if by wherein any one judge define capacitor, reactor remote measure and communication not corresponding, the then automatism voltage control of this transformer station of locking, and provide warning information;
5) capacitor of main transformer low-pressure side, the idle remote measurement of reactor and the conforming check of the idle remote measurement of main transformer low-pressure side are comprised the steps:
5.1) setting of threshold value: the absolute value of the capacitor of main transformer low-pressure side, the idle remote measurement of reactor under normal circumstances and the maximum of getting the ratio of the absolute value after differing from and the idle verification reference value of main transformer low-pressure side of main transformer low-pressure side idle remote measurement absolute value, be designated as fLmt;
5.2) the idle remote measurement value of main transformer low-pressure side, directly obtaining by measuring, being designated as fTrfmVar, unit MVar;
5.3) capacitor of main transformer low-pressure side, the idle remote measurement of reactor, by the topological relation in transformer station, find capacitor, the reactor arrangement on all buses being connected to this main transformer low-pressure side side, and the reactive power measuring value of these equipment is added, draw the idle remote measurement value of main transformer low-voltage side capacitor, reactor, be designated as fCpVar, unit MVar;
5.4) determine to verify reference value, be designated as fTrfmBase, its obtaining value method is: as fabs (fTrfmVar) >fDead, fTrfmBase=fabs (fTrfmVar); As fabs (fTrfmVar) <fDead, fTrfmBase=fDead; FDead is the parameter arranged, and adopts 0.3 ~ 0.5 times of separate unit reactive apparatus capacity, unit MVar;
5.5) absolute value is checked; If satisfy condition:
fabs(fabs(fTrfmVar)-fabs(fCpVar))>fLmt*fTrfmBase
Then think the capacitor of main transformer low-pressure side, the idle remote measurement of reactor and inconsistent with the idle remote measurement of main transformer low-pressure side;
5.5) direction is checked; If fabs (fTrfmVar) >fDead, further travel direction is checked; Note capacitor for just, is just during main transformer low-pressure side is idle inflow main transformer when sending idle; If fTrfmVar*fCpVar<0, namely the idle measuring value of main transformer low-pressure side is different from electric capacity/total reactive sign of anti-device, then the capacitor of main transformer low-pressure side, the idle remote measurement of reactor and inconsistent with the idle remote measurement of main transformer low-pressure side;
5.6) by above-mentioned 5.4) and 5.5) in the verification of the absolute value School Affairs direction of two steps, if there is a kind of situation that the capacitor of main transformer low-pressure side, the idle remote measurement of reactor and inconsistent with the idle remote measurement of main transformer low-pressure side are described, the then automatism voltage control of this transformer station of locking, and provide warning information, ensure that the safe operation of system and equipment;
6) when next round control cycle arrives, go to step 1 continuation again detect and check.
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| CN109510227A (en) * | 2018-09-18 | 2019-03-22 | 中国电力科学研究院有限公司 | Converter station bus steady state voltage determines method and apparatus after a kind of locking of direct current |
| CN112803430A (en) * | 2021-01-15 | 2021-05-14 | 广东电网有限责任公司梅州供电局 | Automatic control method and device for transformer substation voltage |
| CN113433400A (en) * | 2021-05-27 | 2021-09-24 | 国网天津市电力公司电力科学研究院 | System and method for testing voltage regulation transient performance of distributed new energy power station |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106296457A (en) * | 2016-08-12 | 2017-01-04 | 新疆信息产业有限责任公司 | Save and adjust automated information checking method |
| CN109510227A (en) * | 2018-09-18 | 2019-03-22 | 中国电力科学研究院有限公司 | Converter station bus steady state voltage determines method and apparatus after a kind of locking of direct current |
| CN109510227B (en) * | 2018-09-18 | 2021-10-29 | 中国电力科学研究院有限公司 | Method and device for determining steady-state voltage of converter station bus after direct-current blocking |
| CN112803430A (en) * | 2021-01-15 | 2021-05-14 | 广东电网有限责任公司梅州供电局 | Automatic control method and device for transformer substation voltage |
| CN113433400A (en) * | 2021-05-27 | 2021-09-24 | 国网天津市电力公司电力科学研究院 | System and method for testing voltage regulation transient performance of distributed new energy power station |
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