CN103400524A - Method and system for realizing relay protection and secondary circuit debugging visualization - Google Patents
Method and system for realizing relay protection and secondary circuit debugging visualization Download PDFInfo
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Abstract
The invention relates to a method and a system for realizing relay protection and secondary circuit debugging visualization. The system comprises a testing signal generation system, a virtual protection device, a virtual secondary circuit and a visualization unit, wherein the testing signal generation system is used for generating testing signals; the virtual protection device is used for receiving the instantaneous quantity, the steady-state quantity or the positive-sequence, negative-sequence and zero sequence components of the testing signal generation system, generating a current switching quantity variable of logic diagrams for protection, tripping, reclosing and the like, and transmitting the current switching quantity variables to the visualization unit; and the visualization unit is used for extracting the current switching quantity variable of the virtual protection device, the new switching quantity variable of the virtual secondary circuit and a switching quantity variable produced through operation, and generating visualized action images. The method and the system for realizing relay protection and secondary circuit debugging visualization have the beneficial effects that the visualized action images are displayed through two ways, i.e. sampling-point-by-sampling-point control and period-by-period control, and the modules of the system are clear and the training and the learning are facilitated.
Description
Technical field
The present invention relates to relay protection of power system and emulation field, be specifically related to a kind of relay protection and secondary circuit debugging visualization method and system thereof of realizing.
Background technology
Along with the develop rapidly of Protection Technology, more and more perfect, powerful based on the protective relaying device function of computer technology, this theoretical level to the relay protection staff, practical operation level, fault analysis ability are had higher requirement.The relay protection staff not only will correctly operate protective relaying device, and should be able to test the various states of protective relaying device, and the analytical test result.To faulty operation, the analysis of protective relaying device, will directly jeopardize power system security, stable operation, in case accident occurs, the loss that national economy is caused is very huge.
Protective relaying device based on computer technology is powerful, function admirable; along with improving constantly of protective relaying device Microcomputer and integrated level; protective relaying device and associated loop are fewer and feweri by the logic that rigid line forms, and by stealthy program or digital circuit (chip), are realized.Compare with traditional protection, microcomputer based relay protective device and associated loop course of action have invisibility.The sightless characteristics of this process, make the field technician be difficult to grasp principle of work, the operation characteristic of protective relaying device, and these changes accurately grasp protective relaying device to staff such as relay protection, electrical operations and associated loop is brought difficulty.The characteristics of Operation of Electric Systems have determined and can not carry out long repetition test to the protective relaying device at scene, verified the internal logic process of protective relaying device.And traditional Patterns in Teaching lacks sight system, lively.Therefore, extremely be necessary to implement " relay protection and associated loop debug process visual " project.
Summary of the invention
The technical problem to be solved in the present invention is; invisible problem for existing relay protection logic and the existence of secondary circuit course of action; provide a kind of relay protection and secondary circuit debugging visualization method and system thereof of realizing, the full logical process clear, that correctly displaying protection is extremely tripped.
The present invention solves the problems of the technologies described above the technical scheme that adopts to be:
A kind of relay protection and secondary circuit debugging visualization method realized comprises the following steps:
1) generate the test signals such as the needed voltage of test relay protection, electric current and malfunction according to normal operating condition, the malfunction of electric system, and the voltage that will generate, electric current and malfunction are exported according to time sequencing, the voltage, the current signal that generate comprise instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component, complete the simulation of the malfunctions such as single-phase grounding fault, line to line fault earth fault, two-phase short-circuit fault, three phase short circuit fault;
2) with above-mentioned steps 1) instantaneous flow, steady-state quantity or the positive sequence negative phase-sequence zero-sequence component that generate be by Fourier algorithm calculating voltage current value, generates the current switching value variable of the logical diagrams such as protection, tripping operation, reclosing;
3) according to above-mentioned steps 2) the current switching value variable that provides adds executive component visual testing before sampled point and the control box loop visual testing after the action of switching value variable, the executive component visual testing generates new switching value variable, and control box loop visual testing produces single-phase tripping operation, three-phase tripping operation, the permanent tripping operation of three-phase etc. by computing and leaves the quantitative change amount;
4) with above-mentioned steps 2) the secondary switching value variable of once leaving quantitative change amount and step 3) and the quantitative change amount of leaving that produces of computing extract, generate visual motion picture.
Press such scheme, in described step 1), the generation of test signal specifically comprises following operation:
A, selection signalling channel;
B, selection signal type;
C, the harmonic wave ratio is set;
D, the action step-length is set;
E, input voltage and input current amplitude phase angle;
F, click next step and bring into operation.
Press such scheme, in described step 4), visual motion picture passes through sampled point control one by one and two kinds of control modes demonstrations of periodic Control one by one:
A, sampled point is controlled one by one: each sampled point generates test signal, produces the protection logic intake of current sampling point and leaves the quantitative change amount, generate current logic state and secondary circuit shows variable;
B, periodic Control one by one: every 20ms generates test signal, produce the protection logic intake after one-period and leave the quantitative change amount, the logic state and the secondary circuit that generate this all after date show variable;
The acquiescence one-period is got 24 sampled points, the step 1) that switches in of visual control mode arranges action and realizes in step-length, pass and realize real scene protection logic and control loop picture by the time,, if step-length is chosen as 1, take sampled point control mode one by one; , if step-length is chosen as 24, take periodic Control mode one by one.
Press such scheme, above-mentioned steps 3) in the concrete grammar of executive component visual testing and control box loop visual testing as follows:
A) executive component visual testing, before adding sampled point, the test signal system carries out, its method is: click pressing plate, sky is opened and button, whether observe button or LED status changes and is recorded in hurdle, main interface, click successively loop button 1,2,3,4, observe corresponding pressing plate and sky and open whether thereupon variation, and situation of change is pressed charting;
B) control box loop visual testing; detect after the virtual protection device action: send single-hop order, three when Trip Logic and jump order and combined floodgate logic while sending the reclosing order; whether the isolating switch Action Button of checking secondary circuit occur, after button click, whether the control box loop respective change occurs.
The present invention also provides a kind of relay protection and visual system of secondary circuit debugging of realizing, it comprises:
1) test signal generation system, the normal operating condition, the malfunction that are used for according to electric system generate the test signals such as the needed voltage of test relay protection, electric current and malfunction, and the voltage that will generate, electric current and malfunction are exported according to time sequencing, the voltage, the current signal that generate comprise instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component, complete the simulation of the malfunctions such as single-phase grounding fault, line to line fault earth fault, two-phase short-circuit fault, three phase short circuit fault;
The test signal generation system comprises that control knob, signalling channel selection module, harmonic component arrange module, step-length control module, the time processes and show output module, wherein, described signalling channel selects module to be used for selecting signalling channel, harmonic component arranges module and is used for arranging the harmonic wave ratio, the step-length control module is used for arranging the action step-length, and the time processes and shows that output module is used for the test signal of displaying time and setting;
2) virtual protection device, the ac circuit of Reality simulation protective device, protection logic, tripping operation outlet, installation's power source, be used for instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component that above-mentioned test signal generation system is generated by Fourier algorithm calculating voltage current value, generate the current switching value variable (the virtual protection device is according to the test signal that arranges, self pressing plate, definite value, the Determines the result of the action such as alarm whether) of the logical diagrams such as protection, tripping operation, reclosing;
3) virtual secondary circuit, the closing by hand loop of Reality simulation equipment, the hand trip(ping) loop, pressure monitoring and locked loop, isolating switch closes trip(ping) circuit, signal circuit, cut device jump loop, external loop, voltage switching circuit, be used for adding sampled point executive component visual testing and switching value variable action control box loop visual testing afterwards before according to the current switching value variable that above-mentioned virtual protection device provides, the executive component visual testing generates new switching value variable, control box loop visual testing produces single-phase tripping operation by computing, the three-phase tripping operation, three-phase forever trips etc. and to leave the quantitative change amount,
4) visualization, comprise protective device logic visualization, two parts of secondary circuit visualization, protective device logic visualization is used for the current quantitative change amount of leaving of above-mentioned virtual protection device is extracted, and generates visual motion picture; The secondary circuit visualization is used for the quantitative change amount of leaving of the new switching value variable of above-mentioned virtual secondary circuit and computing generation is extracted, and generates visual motion picture;
Described test signal generation system is connected with described virtual protection device, and described virtual protection device is connected with described virtual secondary circuit, and described virtual protection device, described virtual secondary circuit all are connected to described visualization simultaneously.
Press such scheme, the time of described visualization tested person signal generating system is controlled, and takes sampled point one by one to show or cycle demonstration one by one:
A, sampled point is controlled one by one: each sampled point generates test signal, produces the protection logic intake of current sampling point and leaves the quantitative change amount, generate current logic state and secondary circuit shows variable;
B, periodic Control one by one: every 20ms generates test signal, produce the protection logic intake after one-period and leave the quantitative change amount, the logic state and the secondary circuit that generate this all after date show variable;
The acquiescence one-period is got 24 sampled points, the action step-length that switches in the test signal generation system of the control mode of visualization arranges middle realization, pass and realize real scene protection logic and control loop picture by the time,, if step-length is chosen as 1, take sampled point control mode one by one; , if step-length is chosen as 24, take periodic Control mode one by one.
Press such scheme, the malfunction of simulating in described test signal generation system comprises two kinds of transient fault and permanent faults, and the virtual protection device is according to not voltage, the current signal of input in the same time, produces the tripping operation result consistent with true protective device; Voltage and current signal and time coordination,, if As time goes on, only input the electric current and voltage value under normal state, fault case and three kinds of states of coincidence state, and what simulated this moment is transient fault; If input normal state, fault case, coincidence state and forever jump electric current and voltage value under four kinds of states of state, simulation this moment be permanent fault.
Principle of work of the present invention: the test signal generation system generates test signal, the virtual protection device receives instantaneous flow, steady-state quantity or the three order components of test signal generation system,, by Fourier algorithm calculating voltage current value, generate the current switching value variable of the logical diagrams such as protection, tripping operation, reclosing and pass to visualization; Virtual secondary circuit receives the current switching value variable of virtual protection device, generates new switching value variable and single-phase tripping operation, three-phase tripping operation, the permanent tripping operation of three-phase etc. and leaves the quantitative change amount and pass to visualization; Virtual protection device current left the new switching value variable of quantitative change amount and virtual secondary circuit to visualization and the quantitative change amount of leaving that computing produces extracts, and generates visual motion picture.
The beneficial effect that the present invention compared with prior art has:
1, existing skills training system generally adopts actual equipment to simulate, its investment is very high, and product type falls behind very soon, be difficult to update, the present invention is take multimedia technology as core, take real protective relaying device as object, relay protection and associated loop debug process visualization system have been set up, before fault is occurred, when fault occurs and after failure removal, the virtual protection device is from measuring, judgement, the internal logic that starts and carry out and the course of action of virtual secondary circuit display fully, realize truly relay protection and associated loop debug process visual,
2, relay protection and the secondary circuit course of action pointwise emulation mode of pioneering sample-based value;
3, visual system organically organizes together the emulation of protective relaying device debug process and skills training, form the unified platform of theoretical training, training on operation, the training cost of the lowering apparatus equipment importation of redundant technical facilities effectively, greatly promote training efficiency and training quality, the process of learning on computers, operation environment safety;
4, the visual system module design of the present invention is clear; the interface switching is fairly simple; it is an independently Protection simulation experience system; possess again protective device and secondary circuit visualization function; the object of facing is mainly the relay protection professional; also can carry out the training of relay protected operation aspect to the substation operation personnel, facts have proved, the student generally just can be familiar with the use of system within two hours.
Description of drawings
Fig. 1 is the general structure schematic diagram of visualization system of the present invention;
Fig. 2 is the differential protection logical diagram of RCS-931 protective device;
Fig. 3 is reclosure time broadening logical diagram;
Fig. 4 is distance protection time delays logical diagram;
Fig. 5 is the AC current-voltage loop diagram of WXH-803 protective device.
Embodiment
Below in conjunction with embodiment and accompanying drawing, technical scheme of the present invention is described further.
With reference to shown in Figure 1, the present invention, take the microcomputer based relay protective device of Hubei grid widespread use as object, realizes the visual of its loop debug process.
Relay protection and the visual system of secondary circuit debugging of realizing of the present invention comprises test signal generation system, virtual protection device, virtual secondary circuit and visualization:
1) (fault status signal comprises described test signal generation system: three-phase shortcircuit, line to line fault, line to line fault ground connection, singlephase earth fault for the normal operating condition according to electric system, the needed voltage of malfunction generation test relay protection, electric current and malfunction; Instantaneity, permanent) nature of trouble comprises: the test signal such as, and the voltage that will generate, electric current and malfunction are exported according to time sequencing, the voltage, the current signal that generate comprise instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component, complete the simulation of the malfunctions such as single-phase grounding fault, line to line fault earth fault, two-phase short-circuit fault, three phase short circuit fault;
The test signal generation system comprises that control knob, signalling channel selection module, harmonic component arrange module, step-length control module, the time processes and show output module, wherein, described signalling channel selects module to be used for selecting signalling channel, harmonic component arranges module and is used for arranging the harmonic wave ratio, the step-length control module is used for arranging the action step-length, and the time processes and shows that output module is used for the test signal of displaying time and setting;
2) ac circuit of the true protective device of described virtual protection unit simulation, protection logic, tripping operation outlet, installation's power source, be used for instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component that above-mentioned test signal generation system is generated by Fourier algorithm calculating voltage current value, generate the current switching value variable (the virtual protection device is according to the test signal that arranges, self pressing plate, definite value, the Determines the result of the action such as alarm whether) of the logical diagrams such as protection, tripping operation, reclosing;
3) the closing by hand loop of described virtual secondary circuit Reality simulation equipment, the hand trip(ping) loop, pressure monitoring and locked loop, isolating switch closes trip(ping) circuit, signal circuit, cut device jump loop, external loop, voltage switching circuit, be used for adding sampled point executive component visual testing and switching value variable action control box loop visual testing afterwards before according to the current switching value variable that above-mentioned virtual protection device provides, the executive component visual testing generates new switching value variable, control box loop visual testing produces single-phase tripping operation by computing, the three-phase tripping operation, three-phase forever trips etc. and to leave the quantitative change amount,
4) described visualization comprises protective device logic visualization, two parts of secondary circuit visualization, protective device logic visualization is used for the current quantitative change amount of leaving of above-mentioned virtual protection device is extracted, and generates visual motion picture; The secondary circuit visualization is used for the quantitative change amount of leaving of the new switching value variable of above-mentioned virtual secondary circuit and computing generation is extracted, and generates visual motion picture;
Described test signal generation system is connected with described virtual protection device, and described virtual protection device is connected with described virtual secondary circuit, and described virtual protection device, described virtual secondary circuit all are connected to described visualization simultaneously.
Realize protecting the visual of logic and control loop, must distinguish the break-make situation of logical circuit and secondary circuit under different conditions, the variable of inputting visualization system due to logical circuit and the secondary circuit of protective device is all logical variable, the variable that namely has 0 and 1 characteristic, therefore only need to logical circuit and secondary circuit in each element be set to conducting and disconnect two states, when input logic is 1, show conducting state; When being 0, input logic shows off-state.
Closing by hand loop, hand trip(ping) loop, pressure monitoring and locked loop, the isolating switch of the real equipment of described virtual secondary circuit simulation closes trip(ping) circuit, signal circuit, cut device jump loop, external loop, voltage switching circuit and is respectively:
1. closing by hand loop: comprise closing by hand relay SHJ, when manually or other control while closing a floodgate, closing by hand relay SHJ action, its closing of contact, output contact, to closing circuit, is realized closing by hand through combined floodgate guard relay HBJ;
2. hand trip(ping) loop: comprise hand trip(ping) relay STJ, when manual or other control tripping operations, hand trip(ping) relay STJ action, send the tripping operation pulse by moving together contact to isolating switch, the tripping isolating switch, the STJ contact is trip protection or hand trip(ping) in order to can distinguish after being connected on trip signal starting relay TXJI coil;
3. pressure monitoring and locked loop: by tripping operation pressure atresia relay 1YJJ, pressure decreased No switching on relay 2YJJ and pressure anomaly quiescing relay 3YJJ, formed, i) when gas (liquid) when positive pressure is normal, tripping operation pressure atresia relay 1YJJ is in excited state, and trip(ping) circuit is connected; When gas (liquid) pressure was reduced to the pressure that does not allow circuit breaker trip, manometric corresponding contacts action, made the 1YJJ loss of excitation, and its contact is returned, and disconnects trip(ping) circuit; Ii) when gas (liquid) when positive pressure is normal, pressure decreased No switching on relay 2YJJ is in excited state, and closing circuit is connected; When gas (liquid) pressure was reduced to the pressure that does not allow breaker closing, manometric corresponding contacts action, made the 2YJJ loss of excitation, disconnects closing circuit; Pressure decreased No switching on relay 2YJJ has time delay and returns to function, and in the time of can effectively preventing the isolating switch reclosing, the isolating switch vibrations make the locking of pressure contact mistake; Iii) when gas (liquid) when positive pressure is normal, pressure anomaly quiescing relay 3YJJ is excitation not, when pressure reaches quiescing pressure, pressure anomaly quiescing relay 3YJJ excitation, its moving together contact is closed, makes 1YJJ and 2YJJ be lost excitation by short circuit, disconnects closing loop; In order to prevent being in operation because the gas (liquid) of controlling breaker tripping and closing is pressed poor contact of contacts, cause gas (liquid) to press off the lock ring joint malfunctioning, 1YJJ, 2YJJ, 3YJJ are provided with anticipating signal;
4. isolating switch closes trip(ping) circuit: be comprised of closing circuit of circuit breaker and circuit breaker trip loop, closing circuit of circuit breaker is comprised of contact, the break contact group of anti-trip relay TBJ, the trip position supervisory relay TWJ of closing by hand relay SHJ; The circuit breaker trip loop is comprised of the contact of trip protection contact, hand trip(ping) relay STJ, anti-jump current relay TBJI and self-holding contact thereof, trip signal starting relay TXJI, closing operation position relay HWJ and tripping operation pressure atresia relay 1YJJ contact; Isolating switch closes trip(ping) circuit both can realize three-phase breaker tripping operation and closing operation, can carry out the supervision of trip position and closing position again, for the two breaking coil breaker operator loops of first set three-phase, trip(ping) circuit is comprised of two cover identical three-phase single-hop lock loops;
5. signal circuit: comprise the trip signal relay TXJI in trip(ping) circuit, being used for judgement is protection tripping or isolating switch tripping, after the hand trip(ping) contact was connected on trip signal relay TXJI coil, hand trip(ping) was not signaled, so that distinguishing protection tripping operation and hand trip(ping); Trip signal relay TXJI adopts two-position relay, and signal relay output two auxiliary contacts, can start respectively central signal, logout;
6. cut device jump loop: be comprised of anti-jump current relay TBJI and anti-jump voltage relay TBJV, the action current of TBJI is according to the action current self-adaptation of the breaking coil of isolating switch, consider in addition circuit breaker trip loop RL time delay process, tripping current can only rise gradually, and when auxiliary contacts of circuit breaker switching time and main contacts trip time approach or be faster, the life period of tripping current will be very short, therefore TBJI adopts high-speed relay, guarantees reliably to start in the case, after anti-jump current relay TBJI action, with the moving together contact self-sustaining of himself, guarantee the isolating switch reliable trip, its anti-jump voltage relay TBJV is parallel to closing circuit through anti-jump another moving together contact of current relay TBJI, two secondary anti-jump voltage relay break contact groups in parallel are serially connected in closing circuit, as closing pulse is not removed while tripping, the current coil excitation of TBJI also remains to auxiliary contacts of circuit breaker by TBJI-2 and opens, another contact TBJI-1 of TBJI is closed simultaneously, anti-jump voltage relay TBJV is kept by the action of closing pulse power supply, TBJV-1, TBJV-2 disconnects closing circuit, make and unlikelyly after circuit breaker trip again close a floodgate, only remaining closing pulse removes, after anti-jump voltage relay TBJV dead electricity, just connect closing circuit, thereby what prevent isolating switch repeatedly " jump-closes " phenomenon,
7. external loop: be provided with the contact of reflection isolating switch that protective device monitors and each loop situation, comprise for starting accident signal and sending out the circuit breaker position signal of remote signalling, contact, the operation circuit power monitor circuit contact of reflection control loop broken string and the pressure atresia relay contact that reflects isolating switch gas (liquid) body pressure;
8. voltage switching circuit: select as required to be used for the secondary voltage switching of a cover double-bus or double-bus band bypass connection system, also can select to have the secondary voltages switching for two cover double-buss or double-bus band bypass connection system; Bus secondary voltage switching circuit adopts the auxiliary contact of an isolation knife of electric system to control, when primary system carried out switch operation, the voltage a-b box was switched to protective device or instrument with the protection of respective bus bars and measurement with voltage according to the variation of primary connection; Selection relay can be selected two-position relay, can prevent effectively that selection relay returns, and makes protection lose the alternating voltage malfunction because the contact of isolation knife auxiliary contact is bad or install power supply out of hand; Selection relay also can the unit of selecting be put relay, when two bus transfer relays of switching device shifter all are in the involution state, its break contact constituent apparatus decompression alarm signal that is in series, when the double-bus paired running, article two, the busbar voltage transfer relay moves simultaneously, and device can send transfer relay actuating signal simultaneously.
Above-mentioned relay protection and the visual system of secondary circuit debugging realize visualization method, comprise following (one)～(four) step:
(1) generate test signal
The test signal generation system generates the test signals such as the needed voltage of test relay protection, electric current and malfunction in normal operating condition, malfunction according to electric system, specifically comprise following operation:
A, selection signalling channel;
B, selection signal type;
C, the harmonic wave ratio is set;
D, the action step-length is set;
E, input voltage and input current amplitude phase angle;
F, click next step system and bring into operation;
The voltage, electric current and the malfunction that generate are exported according to time sequencing, the voltage, the current signal that generate comprise instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component, complete the simulation of the malfunctions such as single-phase grounding fault, line to line fault earth fault, two-phase short-circuit fault, three phase short circuit fault.
(2) protective device visual testing
Ac circuit, protection logic, tripping operation outlet, installation's power source by the true protective device of virtual protection unit simulation, instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component that above-mentioned test signal generation system is generated be by Fourier algorithm calculating voltage current value, generates the current switching value variable (the virtual protection device is according to the test signal that arranges, self pressing plate, definite value, the Determines the result of the action such as alarm whether) of the logical diagrams such as protection, tripping operation, reclosing;
The protective device visual testing is synchronizeed and is carried out with the generation of test signal, output, the setting of control word and the passing of time along with the test signal of test signal generation system simulation, judgement is protected the action situation of each element in logic and is left situation, its basis for estimation is: reclosing " is stopped using ", the position of the switch " normally "; Reclosing " substance ", the position of the switch " normally ", transient fault:
I) reclosing " is stopped using ", the position of the switch " normally "
Ii) reclosing " substance ", the position of the switch " normally ", transient fault
Protective device is except providing above-mentioned basic detection mode; also provide the impact on protection action of arranging of other control words, such as the II section is closed the impact on trip protection mode and reclosing mode of heavy, heterogeneous lock-reclosing lock, single-hop mode, three jumping modes, substance, the control word such as triple.
Protective device is visual not only comprises the basic protection such as differential protection, distance protection, zero-sequenceprotection logic, and comprises the visual of the action logics such as Trip Logic, recharge logic and reclosing logic.RCS-931(Nanrui Jibao Electric Co., Ltd), CSC-103(Beijing Sifang Jibao Automation Co., Ltd WXH-803(Xuji Electric Co., Ltd)) the device visualization system is used for realizing protection logic and the displaying of secondary circuit action situation under various running statuses of 220kV route protection RCS-931, WXH-803, CSC-103 device; PST-1200(State Electric Power Nanjing Automation Co., Ltd) the device visualization system is used for realizing protection logic and the secondary circuit action situation displaying of 220kV tranformer protection PST-1200 device under various running statuses; South, BP-2C(Shenzhen auspicious relay protection company) the device visualization system is used for realizing protection logic and the secondary circuit action situation displaying of 220kV bus protection BP-2C device under various running statuses.Take the differential protection logic of RCS-931 protective device as example, the visual implementation of native system protective device is described.As shown in Figure 2, implementation step is the differential protection logical diagram of RCS-931 protective device:
1) each being set, to open into, connecting line, logic gate and outlet be discrete component, and two states (red and black) and a logical variable (1 or 0) are set for each element;
2) calculate (background program is completed) according to the voltage and current signal of test macro and the circuit breaker position state of secondary circuit feedback, judge whether 12 intake variablees of differential protection are 1;
3) according to the electronic component in logical diagram (with door or door and the not gate) logical variable of each element of deriving;
4) change the state of element according to the logical variable of each element: when logical variable was 1, show state 2(was red), show state 1(black when logical variable is 0).
Obviously, the visual of differential logic is an independently program, and the difference that its each element state shows is controlled by opening into amount of logic.Test macro only need to just can change by the protection algorithm state that differential logic shows in different sampled points or the different analog quantity of cycle output, reaches the visual requirement of protective device.
Run into two difficult points in protective device is visual: the processing of time explanation element and time-delay element, the state variation of these two time elements not only is subjected to the impact of logical variable, also will be subjected to the impact of the duration of logical variable change.Below as an example of distance protection logic and reclosing logic example, this two problems and solution situation is described respectively.
The time explanation the problems and solutions: reclosure time broadening logical diagram as shown in Figure 3.When M6=1, reclosing outlet KC=1, when M6 becomes 0, return after reclosing outlet time delay 120ms; Settling mode:
A) clock variable tn of design, record the current time (time constantly refreshes);
B) when the M6 logical variable became 1 from 0, the logic of reclosing exported variable became 1, and record current time t1 this moment, and it is set to constant (along with passage of time, not changing);
C) when the M6 logical variable became 0 from 1, the logic of reclosing exported variable depended on the value of variable Y S, and record current time t1 this moment, and it is set to constant (along with passage of time, not changing);
D) increase variable Y S, as tn-t1〉1200 the time, YS=1;
E) increase logic: when YS=1 and M6=0, reclosing exported variable logic becomes 0;
The time delays the problems and solutions: distance protection time delays logical diagram as shown in Figure 4.When M18=1, time-delay element YS=0; After element M18=1 continues 25ms, time-delay element YS=1.Solution:
A) clock variable tn of design, record the current time (time constantly refreshes);
B) when the M18 logical variable becomes 1 from 0, time-delay element YS=0, record current time t1 this moment, and it is set to constant (along with passage of time, not changing);
C) increase variable Y S;
D) when the M18 logical variable is 1, the value of keeping t1 is constant, as tn-t1〉25 the time, YS=1;
E) when the M18 logical variable is 0, t1=tn, as tn-t1=0＜25, YS=0.
(3) secondary circuit visual testing
closing by hand loop by virtual secondary circuit Reality simulation equipment, the hand trip(ping) loop, pressure monitoring and locked loop, isolating switch closes trip(ping) circuit, signal circuit, cut device jump loop, external loop, voltage switching circuit, the current switching value variable that provides according to above-mentioned virtual protection device adds sampled point executive component visual testing and switching value variable action control box loop visual testing afterwards before, the executive component visual testing generates new switching value variable, control box loop visual testing produces single-phase tripping operation by computing, the three-phase tripping operation, three-phase forever trips etc. and to leave the quantitative change amount,
The concrete grammar of executive component visual testing and control box loop visual testing is as follows:
A) executive component visual testing, before adding sampled point, the test signal system carries out, its method is: click pressing plate, sky is opened and button, whether observe button or LED status changes and is recorded in hurdle, main interface, click successively loop button 1,2,3,4, observe corresponding pressing plate and sky and open whether thereupon variation, and situation of change is pressed charting;
B) control box loop visual testing; detect after the virtual protection device action: send single-hop order, three when Trip Logic and jump order and combined floodgate logic while sending the reclosing order; whether the isolating switch Action Button of checking secondary circuit occur, after button click, whether the control box loop respective change occurs.
Visual two parts that include of secondary circuit: DC loop and ac circuit.The overall principle of its design is the electric current rule, when namely all switches of loop are closed, and line conduction.The design comparison of its ac circuit is simple, by the sky of protective device, is opened with voltage switching device and is realized.
Below take the AC current-voltage loop of WXH-803 device, be the visual realization of example explanation ac circuit, as shown in Figure 5, its voltage circuit design procedure is the AC current-voltage loop diagram of WXH-803 protective device:
Contacts all in loop, terminal, connecting line and sky are offered and be set to element, and be divided into two states;
A) all contacts in loop are arranged logical variable, its variable opened by corresponding sky or relay coil is controlled.Be subjected to sky to open 1ZKK as the 1ZKK contact and control, when 1ZKK was closed, logical variable got 1; When 1ZKK was closed, logical variable got 0.The YQJ contact is subjected to the YQJ Control, and when getting I voltage, 1YQJ1-1,1YQJ1-2 and 1YQJ2-1 contact logic variable get 1,2YQJ1-1,2YQJ1-2 and 2YQJ2-1 contact logic variable gets 0; Otherwise also anti-.
B) when logical variables all in a loop all gets 1, this loop conducting, all element show state 2(elements redden); Otherwise, all element show state 1(element blackening).
C) its current return design is fairly simple do not affect because current return is not driveed with contact by sky, so the logic in current return take from protection in logic having stream to differentiate to open into.When A has stream mutually, the loop conducting of A phase current; When B has stream mutually, the loop conducting of B phase current; When C has stream mutually, the loop conducting of C phase current; When having stream mutually, A, B, C any judge the N conducting.
Principle of design and the ac circuit of DC loop are roughly the same, are all to adopt the electric current rule.Its difference is:
A) each contact, loop is opened and the relay Variable Control by hard pressing plate, sky all;
B) between various DC loop, logical relation is arranged, with relay, embody;
C) conducting in loop can change the logical variable of relay, and namely when a loop conducting, the relay variable set up that this loop connects is 1, otherwise is set to 0;
D) contact of same relay and coil are set to same variable.
(4) generate visual motion picture
By the protective device logic visualization in visualization, the current quantitative change amount of leaving of above-mentioned virtual protection device is extracted, generate visual motion picture; By the secondary circuit visualization in visualization, the quantitative change amount of leaving of the new switching value variable of above-mentioned virtual secondary circuit and computing generation is extracted, generate visual motion picture.
For showing from the process that inputs to trip protection of false voltage electric current the difference of virtual protection device and virtual secondary circuit under various states; the time of visualization tested person signal generating system is controlled, and takes sampled point one by one to show or cycle demonstration one by one:
A, sampled point is controlled one by one: each sampled point generates test signal, produces the protection logic intake of current sampling point and leaves the quantitative change amount, generate current logic state and secondary circuit shows variable;
B, periodic Control one by one: every 20ms generates test signal, produce the protection logic intake after one-period and leave the quantitative change amount, the logic state and the secondary circuit that generate this all after date show variable;
The acquiescence one-period is got 24 sampled points, the action step-length that switches in the test signal generation system of the control mode of visualization arranges middle realization, pass and realize real scene protection logic and control loop picture by the time,, if step-length is chosen as 1, take sampled point control mode one by one; , if step-length is chosen as 24, take periodic Control mode one by one.
Current and voltage signals during to fault adopts Fourier algorithm, and the basic ideas of Fourier algorithm are from fourier series, and namely the one-period function can be decomposed into the infinite series of DC component, first-harmonic and each harmonic, as
In formula, ω
1Expression first-harmonic angular frequency; a
nAnd b
nRepresent respectively the sine term of each harmonic and the amplitude of cosine term, wherein more special have: b
0The expression DC component, a
1, b
1The expression fundametal compoment just, the amplitude of cosine term., according to the principle of fourier series, can obtain a
n, b
nBe respectively:
So the nth harmonic current component can be expressed as i
n(t)=b
nCos (n ω
1T)+a
nSin (n ω
1t)
The effective value that can obtain accordingly the nth harmonic current component is
Wherein, a
n, b
nAvailable trapezoidal integration is approximate obtain into
The foregoing is only preferred embodiment of the present invention,, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. realize relay protection and secondary circuit debugging visualization method for one kind, it is characterized in that, comprise the following steps:
1) generate the test signals such as the needed voltage of test relay protection, electric current and malfunction according to normal operating condition, the malfunction of electric system, and the voltage that will generate, electric current and malfunction are exported according to time sequencing, the voltage, the current signal that generate comprise instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component, complete the simulation of the malfunctions such as single-phase grounding fault, line to line fault earth fault, two-phase short-circuit fault, three phase short circuit fault;
2) with above-mentioned steps 1) instantaneous flow, steady-state quantity or the positive sequence negative phase-sequence zero-sequence component that generate be by Fourier algorithm calculating voltage current value, generates the current switching value variable of the logical diagrams such as protection, tripping operation, reclosing;
3) according to above-mentioned steps 2) the current switching value variable that provides adds executive component visual testing before sampled point and the switching value variable control box loop visual testing after changing, the executive component visual testing generates new switching value variable, and control box loop visual testing produces single-phase tripping operation, three-phase tripping operation, the permanent tripping operation of three-phase etc. by computing and leaves the quantitative change amount;
4) with above-mentioned steps 2) the current new switching value variable of leaving quantitative change amount and step 3) and the quantitative change amount of leaving that produces of computing extract, generate visual motion picture.
2. relay protection and the secondary circuit debugging visualization method of realizing as claimed in claim 1, it is characterized in that: in described step 1), the generation of test signal specifically comprises following operation:
A, selection signalling channel;
B, selection signal type;
C, the harmonic wave ratio is set;
D, the action step-length is set;
E, input voltage and input current amplitude phase angle;
F, click next step and bring into operation.
3. relay protection and the secondary circuit debugging visualization method of realizing as claimed in claim 1 is characterized in that: in described step 4) visual motion picture control by sampled point one by one and one by one two kinds of control modes of periodic Control show:
A, sampled point is controlled one by one: each sampled point generates test signal, produces the protection logic intake of current sampling point and leaves the quantitative change amount, generate current logic state and secondary circuit shows variable;
B, periodic Control one by one: every 20ms generates test signal, produce the protection logic intake after one-period and leave the quantitative change amount, the logic state and the secondary circuit that generate this all after date show variable;
The acquiescence one-period is got 24 sampled points, the step 1) that switches in of visual control mode arranges action and realizes in step-length, pass and realize real scene protection logic and control loop picture by the time,, if step-length is chosen as 1, take sampled point control mode one by one; , if step-length is chosen as 24, take periodic Control mode one by one.
4. relay protection and the secondary circuit debugging visualization method of realizing as claimed in claim 1, it is characterized in that: above-mentioned steps 3), the concrete grammar of executive component visual testing and control box loop visual testing is as follows:
A) executive component visual testing, before adding sampled point, the test signal system carries out, its method is: click pressing plate, sky is opened and button, whether observe button or LED status changes and is recorded in hurdle, main interface, click successively loop button 1,2,3,4, observe corresponding pressing plate and sky and open whether thereupon variation, and situation of change is pressed charting;
B) control box loop visual testing; detect after the virtual protection device action: send single-hop order, three when Trip Logic and jump order and combined floodgate logic while sending the reclosing order; whether the isolating switch Action Button of checking secondary circuit occur, after button click, whether the control box loop respective change occurs.
5. realize relay protection and the visual system of secondary circuit debugging for one kind, it is characterized in that, it comprises:
1) test signal generation system, the normal operating condition, the malfunction that are used for according to electric system generate the test signals such as the needed voltage of test relay protection, electric current and malfunction, and the voltage that will generate, electric current and malfunction are exported according to time sequencing, the voltage, the current signal that generate comprise instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component, complete the simulation of the malfunctions such as single-phase grounding fault, line to line fault earth fault, two-phase short-circuit fault, three phase short circuit fault;
The test signal generation system comprises that control knob, signalling channel selection module, harmonic component arrange module, step-length control module, the time processes and show output module, wherein, described signalling channel selects module to be used for selecting signalling channel, harmonic component arranges module and is used for arranging the harmonic wave ratio, the step-length control module is used for arranging the action step-length, and the time processes and shows that output module is used for the test signal of displaying time and setting;
2) virtual protection device, the ac circuit of Reality simulation protective device, protection logic, tripping operation outlet, installation's power source, be used for instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component that above-mentioned test signal generation system is generated by Fourier algorithm calculating voltage current value, generate the current switching value variable of the logical diagrams such as protection, tripping operation, reclosing;
3) virtual secondary circuit, the closing by hand loop of Reality simulation equipment, the hand trip(ping) loop, pressure monitoring and locked loop, isolating switch closes trip(ping) circuit, signal circuit, cut device jump loop, external loop, voltage switching circuit, be used for adding sampled point executive component visual testing and switching value variable before according to the current switching value variable that above-mentioned virtual protection device provides and change control box loop visual testing afterwards, the executive component visual testing generates new switching value variable, control box loop visual testing produces single-phase tripping operation by computing, the three-phase tripping operation, three-phase forever trips etc. and to leave the quantitative change amount,
4) visualization, comprise protective device logic visualization, two parts of secondary circuit visualization, protective device logic visualization is used for the current quantitative change amount of leaving of above-mentioned virtual protection device is extracted, and generates visual motion picture; The secondary circuit visualization is used for the quantitative change amount of leaving of the new switching value variable of above-mentioned virtual secondary circuit and computing generation is extracted, and generates visual motion picture;
Described test signal generation system is connected with described virtual protection device, and described virtual protection device is connected with described virtual secondary circuit, and described virtual protection device, described virtual secondary circuit all are connected to described visualization simultaneously.
6. the visual system of relay protection and secondary circuit debugging that realizes as claimed in claim 5, it is characterized in that: the time of described visualization tested person signal generating system is controlled, and takes one by one sampled point to show or the cycle shows one by one:
A, sampled point is controlled one by one: each sampled point generates test signal, produces the protection logic intake of current sampling point and leaves the quantitative change amount, generate current logic state and secondary circuit shows variable;
B, periodic Control one by one: every 20ms generates test signal, produce the protection logic intake after one-period and leave the quantitative change amount, the logic state and the secondary circuit that generate this all after date show variable;
The acquiescence one-period is got 24 sampled points, the action step-length that switches in the test signal generation system of the control mode of visualization arranges middle realization, pass and realize real scene protection logic and control loop picture by the time,, if step-length is chosen as 1, take sampled point control mode one by one; , if step-length is chosen as 24, take periodic Control mode one by one.
7. the visual system of relay protection and secondary circuit debugging that realizes as claimed in claim 5, it is characterized in that: the malfunction of simulating in described test signal generation system comprises two kinds of transient fault and permanent faults, the virtual protection device, according to voltage, the current signal do not inputted in the same time, produces the tripping operation result consistent with true protective device; Voltage and current signal and time coordination,, if As time goes on, only input the electric current and voltage value under normal state, fault case and three kinds of states of coincidence state, and what simulated this moment is transient fault; If input normal state, fault case, coincidence state and forever jump electric current and voltage value under four kinds of states of state, simulation this moment be permanent fault.
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