CN103400524B - 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 one and realize relay protection and secondary circuit debugging visualization method and system thereof.
Background technology
Along with the develop rapidly of Protection Technology, the protective relaying device function based on computer technology is more and more perfect, powerful, and this theoretical level to relay protection staff, practical operation level, fault analysis ability are had higher requirement.Relay protection staff not only correctly will operate protective relaying device, and should be able to test the various states of protective relaying device, and analytical test result.To faulty operation, the analysis of protective relaying device, will directly jeopardize power system security, stable operation, once accident occurs, the loss caused national economy 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; the logic that protective relaying device and associated loop are made up of rigid line is fewer and feweri, is realized by the program of stealth or digital circuit (chip).Compare with traditional protection, microcomputer based relay protective device and associated loop course of action have invisibility.The sightless feature of this process, make field technician be difficult to grasp principle of work, the operation characteristic of protective relaying device, these changes accurately grasp protective relaying device to the staff such as relay protection, electrical operation and associated loop brings difficulty.The feature of Operation of Electric Systems determines can not carry out long repetition test to the protective relaying device at scene, verifies the internal logic process of protective relaying device.And traditional Patterns in Teaching, that lack system, lively sight.Therefore, be extremely 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; for the invisible problem that existing relay protection logic and secondary circuit course of action exist; one is provided to realize relay protection and secondary circuit debugging visualization method and system thereof, clear, correctly show the full logical process of protection to tripping operation.
The present invention for solving the problems of the technologies described above adopted technical scheme is:
One realizes relay protection and secondary circuit debugging visualization method, comprises the following steps:
1) test signals such as voltage, electric current and malfunction required for test relay protection are generated according to the normal operating condition of electric system, malfunction, and the voltage of generation, electric current and malfunction are exported according to time sequencing, the voltage generated, current signal 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) by above-mentioned steps 1) instantaneous flow, steady-state quantity or the positive sequence negative phase-sequence zero-sequence component that generate by Fourier algorithm calculating voltage current value, generate the current switch quantitative change amount of the logical diagrams such as protection, tripping operation, reclosing;
3) according to above-mentioned steps 2) the current switch quantitative change amount that provides carry out adding sampled point before executive component visual testing and control box loop visual testing after switching value argument action, executive component visual testing generates new switching value variable, and control box loop visual testing produces single-phase tripping operation by computing, three-phase tripping operation, three-phase forever to trip etc. and output quantitative change amount;
4) by above-mentioned steps 2) the secondary switching value variable once outputing quantitative change amount and step 3) and computing produce quantitative change amount of outputing extract, generate visual motion picture.
By such scheme, in described step 1), the generation of test signal specifically comprises following operation:
A, selection signalling channel;
B, selection signal type;
C, harmonic wave ratio is set;
D, action step-length is set;
E, input voltage and input current amplitude phase angle;
F, click next step and bring into operation.
By such scheme, in described step 4), visual motion picture is by sampled point control and periodic Control two kinds of control modes displays one by one one by one:
A, one by one sampled point control: each sampled point generates test signal, produces the relay protective scheme intake of current sampling point and outputs quantitative change amount, generate present logic state and secondary circuit display variable;
B, one by one periodic Control: every 20ms generates test signal, produce one-period after relay protective scheme intake and output quantitative change amount, generate the logic state of this week after date and secondary circuit display variable;
Acquiescence one-period gets 24 sampled points, the step 1) that switches in of visual control mode arranges in action step-length and realizes, temporally pass and realize real scene protection logic and control loop picture, if step-length is chosen as 1, then take sampled point control mode one by one; If step-length is chosen as 24, then take periodic Control mode one by one.
By 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, carried out before test signal system adds sampled point, its method is: click pressing plate, sky are opened and button, whether observation button or LED status change and are recorded in hurdle, main interface, click loop button 1,2,3,4 successively, observe corresponding pressing plate and sky to open and whether change thereupon, and situation of change is pressed charting;
B) control box loop visual testing; detect after virtual protection device action: when Trip Logic send single-hop order, three jump order and combined floodgate logic send reclosing order time; check whether the breaker actuation button of secondary circuit occurs, after button click, whether control box loop respective change occurs.
Present invention also offers one and realize relay protection and secondary circuit debugs visual system, it comprises:
1) test signal generation system, the test signals such as voltage, electric current and the malfunction of testing relay protection are generated for the normal operating condition according to electric system, malfunction, and the voltage of generation, electric current and malfunction are exported according to time sequencing, the voltage generated, current signal 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;
Test signal generation system comprises control knob, signalling channel selects module, harmonic component arranges module, step size controlling module, time-triggered protocol and display translation module, wherein, described signalling channel selects module for selecting signalling channel, harmonic component arranges module for arranging harmonic wave ratio, step size controlling module is used for arranging action step-length, and time-triggered protocol and display translation module are used for the test signal of displaying time and setting;
2) virtual protection device, the ac circuit of Reality simulation protective device, relay protective scheme, tripping operation outlet, installation's power source, for the instantaneous flow, steady-state quantity or the positive sequence negative phase-sequence zero-sequence component that above-mentioned test signal generation system are generated by Fourier algorithm calculating voltage current value, generate the current switch quantitative change amount (virtual protection device is according to the Determines the result of the action such as the test signal of setting, self pressing plate, definite value, whether alarm) of the logical diagrams such as protection, tripping operation, reclosing;
3) virtual secondary circuit, the closing by hand loop of Reality simulation equipment, 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, current switch quantitative change amount for providing according to above-mentioned virtual protection device carry out adding sampled point before executive component visual testing and control box loop visual testing after switching value argument action, executive component visual testing generates new switching value variable, control box loop visual testing produces single-phase tripping operation by computing, three-phase trips, three-phase forever to trip etc. and outputs quantitative change amount,
4) visualization, comprise protective device logic visualization, secondary circuit visualization two parts, protective device logic visualization is used for the current quantitative change amount of outputing of above-mentioned virtual protection device to extract, and generates visual motion picture; The quantitative change amount of outputing that secondary circuit visualization is used for the new switching value variable of above-mentioned virtual secondary circuit and computing produce extracts, 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 are all connected to described visualization simultaneously.
By such scheme, the time controling of described visualization tested person signal generating system, take sampled point display one by one or cycle display one by one:
A, one by one sampled point control: each sampled point generates test signal, produces the relay protective scheme intake of current sampling point and outputs quantitative change amount, generate present logic state and secondary circuit display variable;
B, one by one periodic Control: every 20ms generates test signal, produce one-period after relay protective scheme intake and output quantitative change amount, generate the logic state of this week after date and secondary circuit display variable;
Acquiescence one-period gets 24 sampled points, the action step-length switching in test signal generation system of the control mode of visualization arranges middle realization, temporally pass and realize real scene protection logic and control loop picture, if step-length is chosen as 1, then take sampled point control mode one by one; If step-length is chosen as 24, then take periodic Control mode one by one.
By such scheme, the malfunction simulated in described test signal generation system comprises transient fault and permanent fault two kinds, and virtual protection device, according to the voltage do not inputted in the same time, current signal, 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 coincidence state three kinds of states, what now simulate is transient fault; If input normal state, fault case, coincidence state and the electric current and voltage value under forever jumping state four kinds of states, what now simulate is permanent fault.
Principle of work of the present invention: test signal generation system generates test signal, virtual protection device receives the instantaneous flow of test signal generation system, steady-state quantity or three order components, by Fourier algorithm calculating voltage current value, generate the current switch quantitative change amount of the logical diagrams such as protection, tripping operation, reclosing and pass to visualization; Virtual secondary circuit receives the current switch quantitative change amount of virtual protection device, and generate new switching value variable and single-phase tripping operation, three-phase trips, three-phase forever trips etc. is outputed quantitative change amount and pass to visualization; The quantitative change amount of outputing of the current new switching value variable and computing generation of outputing quantitative change amount and virtual secondary circuit of virtual protection device extracts by visualization, 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 backwardness very soon, be difficult to update, the present invention take multimedia technology as core, with real protective relaying device for object, establish relay protection and associated loop debug process visualization system, before fault is occurred, when fault occurs and after failure removal, virtual protection device is from measurement, judge, the internal logic started and perform and the course of action of virtual secondary circuit display completely, realize the visual of relay protection truly and associated loop debug process,
2, the pioneering relay protection based on sampled value and secondary circuit course of action pointwise emulation mode;
3, the emulation of protective relaying device debug process organically organizes together with skills training by visual system, form the unified platform of theoretical training, training on operation, the training cost of the lowering apparatus equipment importation of redundant technical facilities effectively, significant increase training efficiency and training quality, the process learnt on computers, operation environment safety;
4, the visual system module design of the present invention is clear; changing interface is fairly simple; it is an independently Protection simulation experience system; possess again protective device and secondary circuit visualization function; faced by object mainly relay protection professional; also can carry out the training of relay protected operation aspect to substation operation personnel, facts have proved, student generally just can be familiar with the use of system within two hours.
Accompanying drawing explanation
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 Fig. 1, the present invention for object, realizes the visual of its loop debug process with the microcomputer based relay protective device of Hubei grid widespread use.
Of the present inventionly realize relay protection and secondary circuit debugs visual system, comprise test signal generation system, virtual protection device, virtual secondary circuit and visualization:
1) the test signal generation system described in is used for generating the voltage of test relay protection, electric current and malfunction according to the normal operating condition of electric system, malfunction, and (fault status signal comprises: three-phase shortcircuit, line to line fault, line to line fault ground connection, singlephase earth fault; Nature of trouble comprises: instantaneity, permanent) etc. test signal, and the voltage of generation, electric current and malfunction are exported according to time sequencing, the voltage generated, current signal 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;
Test signal generation system comprises control knob, signalling channel selects module, harmonic component arranges module, step size controlling module, time-triggered protocol and display translation module, wherein, described signalling channel selects module for selecting signalling channel, harmonic component arranges module for arranging harmonic wave ratio, step size controlling module is used for arranging action step-length, and time-triggered protocol and display translation module are used for the test signal of displaying time and setting;
2) ac circuit of the true protective device of virtual protection unit simulation described in, relay protective scheme, tripping operation outlet, installation's power source, for the instantaneous flow, steady-state quantity or the positive sequence negative phase-sequence zero-sequence component that above-mentioned test signal generation system are generated by Fourier algorithm calculating voltage current value, generate the current switch quantitative change amount (virtual protection device is according to the Determines the result of the action such as the test signal of setting, self pressing plate, definite value, whether alarm) of the logical diagrams such as protection, tripping operation, reclosing;
3) the closing by hand loop of the virtual secondary circuit Reality simulation equipment described in, 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, current switch quantitative change amount for providing according to above-mentioned virtual protection device carry out adding sampled point before executive component visual testing and control box loop visual testing after switching value argument action, executive component visual testing generates new switching value variable, control box loop visual testing produces single-phase tripping operation by computing, three-phase trips, three-phase forever to trip etc. and outputs quantitative change amount,
4) visualization described in comprises protective device logic visualization, secondary circuit visualization two parts, protective device logic visualization is used for the current quantitative change amount of outputing of above-mentioned virtual protection device to extract, and generates visual motion picture; The quantitative change amount of outputing that secondary circuit visualization is used for the new switching value variable of above-mentioned virtual secondary circuit and computing produce extracts, 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 are all connected to described visualization simultaneously.
Realize the visual of relay protective scheme and control loop, the break-make situation of logical circuit and secondary circuit under different conditions must be distinguished, because the logical circuit of protective device and the variable of secondary circuit input visualization system are all logical variables, namely there is the variable of 0 and 1 characteristic, therefore only need each element in logical circuit and secondary circuit be set to conducting and disconnect two states, when input logic is 1, display conducting state; Off-state is shown when input logic is 0.
The closing by hand loop of the real equipment of described virtual secondary circuit simulation, hand trip(ping) loop, pressure monitoring and locked loop, isolating switch close trip(ping) circuit, signal circuit, cut device jump loop, external loop, voltage switching circuit are respectively:
1. closing by hand loop: comprise closing by hand relay SHJ, when manually or other control to close a floodgate time, closing by hand relay SHJ action, its closing of contact, output contact to closing circuit, realizes closing by hand through combined floodgate guard relay HBJ;
2. hand trip(ping) loop: comprise hand trip(ping) relay STJ, when manually or other control tripping operation time, hand trip(ping) relay STJ action, tripping operation pulse is sent to isolating switch by moving together contact, tripping isolating switch, after STJ contact is connected on trip signal starting relay TXJI coil, so that can distinguish is trip protection or hand trip(ping);
3. pressure monitoring and locked loop: reduced No switching on relay 2YJJ and pressure anomaly quiescing relay 3YJJ formed by tripping operation pressure atresia relay 1YJJ, pressure, i) when gas (liquid) positive pressure is normal, tripping operation pressure atresia relay 1YJJ is in excited state, and trip(ping) circuit is connected; When gas (liquid) pressure is reduced to the pressure not allowing circuit breaker trip, manometric corresponding contacts action, makes 1YJJ loss of excitation, and its contact returns, and disconnects trip(ping) circuit; Ii) when gas (liquid) positive pressure is normal, pressure reduces No switching on relay 2YJJ and is in excited state, and closing circuit is connected; When gas (liquid) pressure is reduced to the pressure not allowing breaker closing, manometric corresponding contacts action, makes 2YJJ loss of excitation, disconnects closing circuit; Pressure reduces No switching on relay 2YJJ to be had time delay and returns function, and when effectively can prevent isolating switch reclosing, isolating switch vibrations make pressure contact locking by mistake; Iii) when gas (liquid) positive pressure is normal, pressure anomaly quiescing relay 3YJJ not excitation, when pressure reaches quiescing pressure, pressure anomaly quiescing relay 3YJJ excitation, its moving together contact closes, make 1YJJ and 2YJJ be lost excitation by short circuit, disconnect closing loop; In order to prevent the gas (liquid) be in operation owing to controlling breaker tripping and closing from pressing poor contact of contacts, cause gas (liquid) to press off lock ring joint malfunctioning, 1YJJ, 2YJJ, 3YJJ are provided with anticipating signal;
4. isolating switch closes trip(ping) circuit: be made up of closing circuit of circuit breaker and circuit breaker trip loop, and closing circuit of circuit breaker is made up of the contact of closing by hand relay SHJ, the break contact group of anti-trip relay TBJ, trip position supervisory relay TWJ; Circuit breaker trip loop is made up of the contact of trip protection contact, hand trip(ping) relay STJ, anti-jump current relay TBJI and self-holding contact, 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, the supervision of trip position and closing position can be carried out again, for the two breaking coil breaker operator loop of first set three-phase, trip(ping) circuit is made up of the two identical three-phase single-hop lock loops of cover;
5. signal circuit: comprise the trip signal relay TXJI in trip(ping) circuit, for judge be relay fail or isolating switch tripping, after hand trip(ping) contact is connected on trip signal relay TXJI coil, hand trip(ping) is not signaled, so that distinguishing protection tripping operation and hand trip(ping); Trip signal relay TXJI adopts two-position relay, and signal relay exports two auxiliary contacts, can start central signal, logout respectively;
6. cut device jump loop: be made up 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 circuit breaker trip loop RL time delay process in addition, tripping current can only rise gradually, and when auxiliary contacts of circuit breaker switching time and main contacts trip time close to or faster time, the life period of tripping current will be very short, therefore TBJI adopts high-speed relay, ensures reliably to start in the case, after anti-jump current relay TBJI action, with the moving together contact self-sustaining of himself, ensure 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, during as tripped, closing pulse is not removed, 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 closes simultaneously, anti-jump voltage relay TBJV is kept by the action of closing pulse power supply, TBJV-1, TBJV-2 disconnects closing circuit, unlikelyly after making circuit breaker trip again to close a floodgate, only need closing pulse remove, after anti-jump voltage relay TBJV dead electricity, just connect closing circuit, thus prevent repeatedly " jumping-close " phenomenon of isolating switch,
7. external loop: be provided with reflection protective device institute and monitor the contact of isolating switch and each loop situation, comprises for starting accident signal and sending out the circuit breaker position signal of remote signalling, the contact of reflection control loop template, operation circuit power monitor circuit contact and reflect the pressure atresia relay contact of isolating switch gas (liquid) body pressure;
8. voltage switching circuit: select the secondary voltage being used for a set of double-bus or double-bus band bypass connection system to switch as required, also can select the secondary voltage had for two cover double-buss or double-bus band bypass connection system to switch; Bus secondary voltage switching circuit adopts the auxiliary contact of an electric system isolation knife to control, when primary system carries out switch operation, the protection of respective bus bars and measurement voltage are switched to protective device or instrument according to the change of primary connection by voltage changing boxes; Selection relay can select two-position relay, and can effectively prevent because of the bad or device power supply out of hand of isolation knife auxiliary contact contact, selection relay returns, and makes protection lose alternating voltage malfunction; Selection relay also can select unit to put relay, when switching device shifter two bus transfer relays are all in involution state, its break contact is in series constituent apparatus decompression alarm signal, when double-bus paired running, article two, busbar voltage transfer relay action simultaneously, device can send transfer relay actuating signal simultaneously.
Above-mentioned relay protection and secondary circuit are debugged visual system and are realized visualization method, comprise following (one) ~ (four) step:
(1) test signal is generated
Test signal generation system generates the test signals such as voltage, electric current and malfunction required for test relay protection according to electric system in normal operating condition, malfunction, specifically comprises following operation:
A, selection signalling channel;
B, selection signal type;
C, harmonic wave ratio is set;
D, 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 generated, electric current and malfunction export according to time sequencing, the voltage generated, current signal 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
By the ac circuit of the true protective device of virtual protection unit simulation, relay protective scheme, tripping operation outlet, installation's power source, the instantaneous flow, steady-state quantity or the positive sequence negative phase-sequence zero-sequence component that above-mentioned test signal generation system are generated, by Fourier algorithm calculating voltage current value, generate the current switch quantitative change amount (virtual protection device is according to the Determines the result of the action such as the test signal of setting, self pressing plate, definite value, whether alarm) of the logical diagrams such as protection, tripping operation, reclosing;
The generation of protective device visual testing and test signal is synchronously carried out, the output of test signal of simulating along with test signal generation system, the setting of control word and the passing of time, judge the action situation of each element in relay protective scheme and output 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; additionally provide the impact arranged protection act of other control words, such as II section closes heavy, heterogeneous lock-reclosing lock, single-hop mode, three jumping modes, substance, the control word such as triple to the impact of trip protection mode and reclosing mode.
Protective device is visual not only comprises the basic relay protective scheme such as differential protection, distance protection, zero-sequenceprotection, and comprises the visual of the action logics such as Trip Logic, recharge logic and reclosing logic.RCS-931(Nanrui Jibao Electric Co., Ltd), WXH-803(Xuji Electric Co., Ltd), CSC-103(Beijing Sifang Jibao Automation Co., Ltd) device visualization system is for realizing the relay protective scheme of 220kV route protection RCS-931, WXH-803, CSC-103 device under various running status and secondary circuit action situation is shown; PST-1200(State Electric Power Nanjing Automation Co., Ltd) device visualization system is for realizing the relay protective scheme of 220kV tranformer protection PST-1200 device under various running status and secondary circuit action situation is shown; BP-2C(Shenzhen Nan Rui relay protection company) device visualization system is for realizing the relay protective scheme of 220kV bus protection BP-2C device under various running status and secondary circuit action situation is shown.For the differential protection logic of RCS-931 protective device, 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) arrange each open into, connecting line, logic gate and outlet be discrete component, and arrange two states (red and black) and a logical variable (1 or 0) for each element;
2) carry out calculating (background program completes) 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 logical variable of electronic component (with door or door and not gate) each element of deriving in logical diagram;
4) change the state of element according to the logical variable of each element: when logical variable is 1, display state 2(is red), show state 1(black when logical variable is 0).
Obviously, the visual of differential logic is an independently program, and the difference of its each element state display controls into amount of logic by opening.Test macro only needs to export different analog quantitys at different sampled points or cycle, just can be changed the state of differential logic display, reach the visual requirement of protective device by protection algorism.
In protective device is visual, encounter two difficult points: the process of time explanation element and time-delay element, the state change of these two time elements, also will by the impact of the duration of logical variable change not only by the impact of logical variable.For distance protection logic and reclosing logic, this two problems and solution situation are described respectively below.
Time explanation the problems and solutions: reclosure time broadening logical diagram as shown in Figure 3.As M6=1, reclosing outlet KC=1, when M6 becomes 0, returns after reclosing outlet time delay 120ms; Settling mode:
A) design a clock variable tn, record the current time (time constantly refreshes);
B) when M6 logical variable becomes 1 from 0, the logic of reclosing exported variable becomes 1, now records current time t1, and is set to constant (not changing along with passage of time);
C) when M6 logical variable becomes 0 from 1, the logic of reclosing exported variable depends on the value of variable Y S, now records current time t1, and is set to constant (not changing along with passage of time);
D) variable Y S is increased, as tn-t1>1200, YS=1;
E) increase logic: as YS=1 and M6=0 time, reclosing exported variable logic becomes 0;
Time delays the problems and solutions: distance protection time delays logical diagram as shown in Figure 4.As M18=1, time-delay element YS=0; After element M18=1 continues 25ms, time-delay element YS=1.Solution:
A) design a clock variable tn, record the current time (time constantly refreshes);
B) when M18 logical variable becomes 1 from 0, time-delay element YS=0, now records current time t1, and is set to constant (not changing along with passage of time);
C) variable Y S is increased;
D) when M18 logical variable is 1, the value maintaining t1 is constant, as tn-t1>25, and YS=1;
E) when M18 logical variable is 0, t1=tn, works as tn-t1=0<25, YS=0.
(3) secondary circuit visual testing
By the closing by hand loop of virtual secondary circuit Reality simulation equipment, 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 switch quantitative change amount provided according to above-mentioned virtual protection device carry out adding sampled point before executive component visual testing and control box loop visual testing after switching value argument action, executive component visual testing generates new switching value variable, control box loop visual testing produces single-phase tripping operation by computing, three-phase trips, three-phase forever to trip etc. and outputs 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, carried out before test signal system adds sampled point, its method is: click pressing plate, sky are opened and button, whether observation button or LED status change and are recorded in hurdle, main interface, click loop button 1,2,3,4 successively, observe corresponding pressing plate and sky to open and whether change thereupon, and situation of change is pressed charting;
B) control box loop visual testing; detect after virtual protection device action: when Trip Logic send single-hop order, three jump order and combined floodgate logic send reclosing order time; check whether the breaker actuation button of secondary circuit occurs, after button click, whether control box loop respective change occurs.
The visual of secondary circuit includes two parts: DC loop and ac circuit.The overall principle of its design is electric current rule, when namely an all switch in loop closes, and line conduction.The design comparison of its ac circuit is simple, is opened realize with voltage switching device by the sky of protective device.
For the AC current-voltage loop of WXH-803 device, the visual realization of ac circuit is described below, 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 is set to element, and be divided into two states;
A) all contacts in loop are arranged logical variable, its variable opens by corresponding sky or relay coil controls.Open 1ZKK as 1ZKK contact by sky to control, when 1ZKK closes, logical variable gets 1; When 1ZKK closes, logical variable gets 0.YQJ contact is by YQJ Control, and when getting I voltage, 1YQJ1-1,1YQJ1-2 and 1YQJ2-1 contact logic variable gets 1,2YQJ1-1,2YQJ1-2 and 2YQJ2-1 contact logic variable gets 0; Otherwise it is also anti-.
B) when logical variables all in a loop all gets 1, this loop conducting, all element display state 2(elements redden); Otherwise, the blackening of all element display state 1(elements).
C) its current return design is fairly simple, affects with contact because current return is not driveed by sky, thus the logic in current return take from relay protective scheme having stream differentiation open into.When A phase has stream, the loop conducting of A phase current; When B phase has stream, the loop conducting of B phase current; When C phase has stream, the loop conducting of C phase current; N conducting is judged when A, B, C any has stream mutually.
The principle of design of DC loop is roughly the same with ac circuit, is all to adopt electric current rule.Its difference is:
A) each Loop Contacts is all opened and relay Variable Control by hard pressing plate, sky;
B) there is logical relation between various DC loop, embody with relay;
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) visual motion picture is generated
By the protective device logic visualization in visualization, the current quantitative change amount of outputing of above-mentioned virtual protection device is extracted, generates visual motion picture; By the secondary circuit visualization in visualization, the quantitative change amount of outputing that the new switching value variable of above-mentioned virtual secondary circuit and computing produce is extracted, generates visual motion picture.
For showing the difference inputing to virtual protection device and virtual secondary circuit under various state the process of trip protection from false voltage electric current; the time controling of visualization tested person signal generating system, take sampled point display one by one or cycle display one by one:
A, one by one sampled point control: each sampled point generates test signal, produces the relay protective scheme intake of current sampling point and outputs quantitative change amount, generate present logic state and secondary circuit display variable;
B, one by one periodic Control: every 20ms generates test signal, produce one-period after relay protective scheme intake and output quantitative change amount, generate the logic state of this week after date and secondary circuit display variable;
Acquiescence one-period gets 24 sampled points, the action step-length switching in test signal generation system of the control mode of visualization arranges middle realization, temporally pass and realize real scene protection logic and control loop picture, if step-length is chosen as 1, then take sampled point control mode one by one; If step-length is chosen as 24, then take periodic Control mode one by one.
Adopt Fourier algorithm to current and voltage signals during fault, the basic ideas of Fourier algorithm are from fourier series, and namely one-period function can be decomposed into the infinite series of DC component, first-harmonic and each harmonic, as
In formula, ω
1represent first-harmonic angular frequency; a
nand b
nrepresent the sine term of each harmonic and the amplitude of cosine term respectively, wherein more special have: b
0represent DC component, a
1, b
1represent fundametal compoment just, the amplitude of cosine term.According to the principle of fourier series, a can be obtained
n, b
nbe respectively:
So nth harmonic current component can be expressed as i
n(t)=b
ncos (n ω
1t)+a
nsin (n ω
1t)
The effective value can obtaining nth harmonic current component is accordingly
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 amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. realize relay protection and a secondary circuit debugging visualization method, it is characterized in that, comprise the following steps:
1) voltage, electric current and the malfunction test signal required for test relay protection is generated according to the normal operating condition of electric system, malfunction, and the voltage of generation, electric current and malfunction are exported according to time sequencing, the voltage generated, current signal comprise instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component, complete the simulation of single-phase grounding fault, line to line fault earth fault, two-phase short-circuit fault, three phase short circuit fault malfunction;
2) by above-mentioned steps 1) instantaneous flow, steady-state quantity or the positive sequence negative phase-sequence zero-sequence component that generate by Fourier algorithm calculating voltage current value, generate the current switch quantitative change amount of protection, tripping operation, reclosing logic figure;
3) according to above-mentioned steps 2) the current switch quantitative change amount that provides carry out adding sampled point before executive component visual testing and switching value variable change after control box loop visual testing, executive component visual testing generates new switching value variable, and control box loop visual testing produces single-phase tripping operation by computing, three-phase trips, three-phase forever trips and outputs quantitative change amount;
4) by above-mentioned steps 2) current output quantitative change amount and step 3) new switching value variable and the quantitative change amount of outputing that produces of computing extract, generate visual motion picture.
2. realize relay protection and secondary circuit debugging visualization method 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, harmonic wave ratio is set;
D, action step-length is set;
E, input voltage and input current amplitude phase angle;
F, click next step and bring into operation.
3. realize relay protection and secondary circuit debugging visualization method as claimed in claim 1, it is characterized in that: in described step 4), visual motion picture is by sampled point control and periodic Control two kinds of control modes displays one by one one by one:
A, one by one sampled point control: each sampled point generates test signal, produces the relay protective scheme intake of current sampling point and outputs quantitative change amount, generate present logic state and secondary circuit display variable;
B, one by one periodic Control: every 20ms generates test signal, produce one-period after relay protective scheme intake and output quantitative change amount, generate the logic state of this week after date and secondary circuit display variable;
Acquiescence one-period gets 24 sampled points, the step 1) that switches in of visual control mode arranges in action step-length and realizes, temporally pass and realize real scene protection logic and control loop picture, if step-length is chosen as 1, then take sampled point control mode one by one; If step-length is chosen as 24, then take periodic Control mode one by one.
4. realize relay protection and secondary circuit debugging visualization method as claimed in claim 1, it is characterized in that: 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, carried out before test signal system adds sampled point, its method is: click pressing plate, sky are opened and button, whether observation button or LED status change and are recorded in hurdle, main interface, click loop button 1,2,3,4 successively, observe corresponding pressing plate and sky to open and whether change thereupon, and situation of change is pressed charting;
B) control box loop visual testing; detect after virtual protection device action: when Trip Logic send single-hop order, three jump order and combined floodgate logic send reclosing order time; check whether the breaker actuation button of secondary circuit occurs, after button click, whether control box loop respective change occurs.
5. realize relay protection and secondary circuit debugs a visual system, it is characterized in that, it comprises:
1) test signal generation system, voltage, electric current and the malfunction test signal of testing relay protection is generated for the normal operating condition according to electric system, malfunction, and the voltage of generation, electric current and malfunction are exported according to time sequencing, the voltage generated, current signal comprise instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component, complete the simulation of single-phase grounding fault, line to line fault earth fault, two-phase short-circuit fault, three phase short circuit fault malfunction;
Test signal generation system comprises control knob, signalling channel selects module, harmonic component arranges module, step size controlling module, time-triggered protocol and display translation module, wherein, described signalling channel selects module for selecting signalling channel, harmonic component arranges module for arranging harmonic wave ratio, step size controlling module is used for arranging action step-length, and time-triggered protocol and display translation module are used for the test signal of displaying time and setting;
2) virtual protection device, the ac circuit of Reality simulation protective device, relay protective scheme, tripping operation outlet, installation's power source, instantaneous flow, steady-state quantity or positive sequence negative phase-sequence zero-sequence component for being generated by above-mentioned test signal generation system pass through Fourier algorithm calculating voltage current value, generate the current switch quantitative change amount of protection, tripping operation, reclosing logic figure;
3) virtual secondary circuit, the closing by hand loop of Reality simulation equipment, 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, current switch quantitative change amount for providing according to above-mentioned virtual protection device carry out adding sampled point before executive component visual testing and switching value variable change after control box loop visual testing, executive component visual testing generates new switching value variable, control box loop visual testing produces single-phase tripping operation by computing, three-phase trips, three-phase forever trips and outputs quantitative change amount,
4) visualization, comprise protective device logic visualization, secondary circuit visualization two parts, protective device logic visualization is used for the current quantitative change amount of outputing of above-mentioned virtual protection device to extract, and generates visual motion picture; The quantitative change amount of outputing that secondary circuit visualization is used for the new switching value variable of above-mentioned virtual secondary circuit and computing produce extracts, 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 are all connected to described visualization simultaneously.
6. realize relay protection as claimed in claim 5 and secondary circuit debugs visual system, it is characterized in that: the time controling of described visualization tested person signal generating system, take sampled point display one by one or cycle display one by one:
A, one by one sampled point control: each sampled point generates test signal, produces the relay protective scheme intake of current sampling point and outputs quantitative change amount, generate present logic state and secondary circuit display variable;
B, one by one periodic Control: every 20ms generates test signal, produce one-period after relay protective scheme intake and output quantitative change amount, generate the logic state of this week after date and secondary circuit display variable;
Acquiescence one-period gets 24 sampled points, the action step-length switching in test signal generation system of the control mode of visualization arranges middle realization, temporally pass and realize real scene protection logic and control loop picture, if step-length is chosen as 1, then take sampled point control mode one by one; If step-length is chosen as 24, then take periodic Control mode one by one.
7. realize relay protection as claimed in claim 5 and secondary circuit debugs visual system, it is characterized in that: the malfunction simulated in described test signal generation system comprises transient fault and permanent fault two kinds, virtual protection device, according to the voltage do not inputted in the same time, current signal, 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 coincidence state three kinds of states, what now simulate is transient fault; If input normal state, fault case, coincidence state and the electric current and voltage value under forever jumping state four kinds of states, what now simulate is permanent fault.
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