CN101728865B - Undisturbed stable switching method for industrial enterprise factory electrical system - Google Patents
Undisturbed stable switching method for industrial enterprise factory electrical system Download PDFInfo
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- CN101728865B CN101728865B CN2009101835765A CN200910183576A CN101728865B CN 101728865 B CN101728865 B CN 101728865B CN 2009101835765 A CN2009101835765 A CN 2009101835765A CN 200910183576 A CN200910183576 A CN 200910183576A CN 101728865 B CN101728865 B CN 101728865B
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Abstract
The invention provides an undisturbed stable switching method for an industrial enterprise factory electrical system. The switching among a main feeder line, a standby feeder line and a bus coupler of a factory electrical system is controlled by an undisturbed stable control device comprising a CPU module, and a load is switched to a standby line. The method comprises the following steps of recognizing a running mode, starting a start mode, selecting a switching mode and judging according to the switching action process and a realizing way. The invention can prevent running voltage interruption or equipment impact damage caused during power supply switching, simplify the power supply switching operation and reduce misoperation, thereby ensuring the power-on continuous running of electrical equipment.
Description
Technical field
The present invention relates to a kind of using electricity system changing method, particularly a kind of undisturbed stable switching method for industrial enterprise factory electrical system.
Background technology
A large amount of power consumption equipments is installed in the electrical network, because electrical network is huge, receives natural environment influence bigger, equipment is many; The probability of fault is higher, is prone to power supply short time disruption, is generally isolated neutral system owing to press in the chemical industry iron and steel enterprise; But because system is big, system capacitive current is big, though arc suppression coil is installed; After often single-phase earthing taking place, develop rapidly and be heterogeneous short circuit, busbar voltage will fluctuate rapidly; Because the needs of production technology often are equipped with jumbo rectifier transformer, a large amount of harmonic waves is arranged in the system simultaneously, protective relaying device, automatic control equipment are caused interference, equipment failure rate increases, thereby causes the electric power system unusual fluctuations; The hot often coupling of 400V protection, fuse protection, fault clearing time long (more than the general 200mS); System has when the self-starting motor exists in groups in a large number, and starting current big especially (possibly cause the protection misoperation sometimes) often exists that the busbar voltage fluctuation is big, the time is long; For guaranteeing power supply reliability, medium voltage network is a paired running for part large enterprise, and any equipment fault all can cause power-supply fluctuation in the system, and the probability that equipment has more existing voltage fluctuation more is high more.
More than the system voltage that causes of multiple reason when occurring than great fluctuation process, the as easy as rolling off a log bus section, busbar section top unit exception that causes is stopped, to such an extent as to it is unusual to cause technological process to occur, even flow process stops, cause produce disorderly.As far as the motor in the system, when voltage drops to 70% when following, it is exerted oneself dropping to below 50%; With influencing normally carrying out of technological process, many equipment all are equipped with the under-voltage protection of 0.5S, when system occurs when unusual; Even system's prepared auto restart precision maneuver (bus loss of pressure is delayed time often greater than the overcurrent time, and promptly switching time is greater than 0.5S, more greater than A.C. contactor dead electricity drop-away time); Even handover success just, the under-voltage protection of 0.5S has also been moved, when simultaneity factor has in a large number in groups the self-starting motor; Self-starting electric current big especially (possibly cause the protection misoperation sometimes) often exists that the busbar voltage fluctuation is big, the time is long.As: be prone to cause synchronous machine step-out, loss of excitation, low-voltage action and out of service, this moment, stand-by power supply can only be as emergency power supply, and interruption will appear in the technological process of production, have the very big hidden danger of production safety.
For medium and small chemical enterprise owing to there is not a large amount of high-voltage motors; When voltage fluctuation occurring in the system, the decay of the residual voltage of bus is fast especially, and promptly system is poor to the defensive ability/resistance ability of voltage fluctuation; Simultaneously owing to most of A.C. contactor that adopts in the 400V switch cubicle; The characteristic of A.C. contactor is: return voltage 30%～70%, and A.C. contactor just breaks off in 60-80mS, the voltage fluctuation that a variety of causes causes; Very easily cause A.C. contactor improper separately, interrupting will appear in the technological process of production.
As far as the synchronous motor in the system, because the field loss protection action, very easily appears often from same power supply in field power supply when fluctuation takes place power supply; During mains fluctuations, very easily cause the synchronous machine step-out, cause synchronous machine out of service; When fluctuation long period occur when power supply in addition, under-voltage protection will be moved, and cause synchronous machine out of service.Important motor such as synchronous machine is out of service, with the very big hidden danger that causes production safety, even causes serious production safety accident.
Summary of the invention
The purpose of this invention is to provide a kind of state, stablize changing method to the no disturbance that load switches on the extension wire with the fastest speed when solving supply line's fault according to station service electrical system.
For realizing the object of the invention; The present invention provides a kind of undisturbed stable switching method for industrial enterprise factory electrical system; Switch through comprising between the no disturbance stabilization control device control station service electrical system main feeder of CPU module, power supply module, switching value module, of ac module, direct current module, outlet module, signal module and management module, subsequent use feeder line, the female three of couplet; Load is switched on the extension wire, comprise following switch step
The CPU module detects the circuit breaker switch state in the station service electrical system, discerns station service electrical system automatically and be to run on double-fed line mode or the double-fed line adds female mode;
After the CPU module detected the start-up logic signal, starting was normally switched, accident is switched or improper switching start mode;
Switch under the start mode normal; Carry out the switching mode selection that normal parallel connection is switched, normally switched simultaneously or normal series connection is switched; Switch under the start mode in accident; Carry out the switching mode selection that improper switching simultaneously of accident or the improper series connection of accident are switched, under improper switching start mode, carry out improper series connection switching mode;
According to the change action process status; Under normal parallelly connected switching mode, switch through the implementation of quick switching, normal switch simultaneously, normal series connection is switched, the accident series connection is switched, accident is switched simultaneously or improper series connection switching mode under carry out friction speed between main feeder, the subsequent use feeder line fast, the implementation switched of homophase, residual voltage or long delay switches.
Said start mode is artificial switching signal under normal switch instances, makes main feeder, subsequent use feeder line, the manual switching between female the couplet; Under accident switching, improper switch instances,, make the automatic switchover between main feeder and the subsequent use feeder line through the upper level main protection contact of main feeder or subsequent use feeder line, female dead electricity or switch mis-jumping signal of joining; The start mode of improper switching is divided into low pressure again and steals the jump-start mode.
Normal parallelly connected switching mode is divided into normal parallelly connected automatic switching mode and normal parallelly connected semi-automatic switching mode again.
Carry out acceleration protection after the subject branch that starting was closed a floodgate when accident was switched.
Various switchings are meant from main feeder switches to subsequent use feeder line, perhaps switches to main feeder from subsequent use feeder line.
Further comprise locking, warning, measurement demonstration, accident record, record ripple, printing and communication steps.
Said normal switching start mode is when system's operate as normal, behind manual switching main feeder and the subsequent use feeder switch, selects from two-way switching mode of carrying out normal parallel connection switching, normal switching simultaneously or normal series connection switching between main feeder and the subsequent use feeder line; It is after the upper level main protection contact starting of main feeder or subsequent use feeder line that said accident is switched, and carries out the switching mode that the accident series connection is switched or accident is switched simultaneously and selects from two-way between main feeder and the subsequent use feeder line; Said improper switching is that self-starting does not have the disturbance stabilization control device, realizes two-way switching between main feeder and the subsequent use feeder line after low pressure starting or switch are stolen jump-start;
When selecting normal parallelly connected switching mode, by the manual work starting, if parallelly connected switching condition also can carry out parallelly connected automatic switching mode or parallelly connected semi-automatic switching mode when satisfying;
When parallelly connected automatic switching mode; No disturbance stabilization control device is with the subsequent use feeder switch that closes earlier; Automatic again tripping main feeder switch; If the parallelly connected switching condition in starting back does not satisfy, subsequent use feeder switch does not close or the not tripping of main feeder switch, device will send handoff failure and device block signal simultaneously in locking;
When the semi-automatic switching mode of parallel connection; The subsequent use feeder switch that closes, and the operation of tripping main feeder switch is accomplished by manual work, if in the time of adjusting; Manual work is the tripping main feeder not yet; No disturbance stabilization control device will send handoff failure and device block signal simultaneously in locking, if the parallelly connected switching condition in starting back does not satisfy or subsequent use feeder switch does not close, device will be sent out handoff failure and device block signal simultaneously in locking;
When normal switching mode simultaneously, switch by the manual work starting, jump the main feeder switch earlier; After satisfying the switching criterion; The subsequent use feeder switch that closes, normal switch simultaneously have fast, homophase, three kinds of implementations of switching under the criterion of residual voltage, no disturbance stabilization control device changes homophase or residual voltage switching implementation automatically over to when unsuccessful fast; If the not tripping of main feeder switch, device will be sent out handoff failure and device block signal simultaneously decoupling; If the subsequent use feeder switch of starting does not close, device will send handoff failure and device block signal simultaneously in locking;
When normal series connection switching mode, switch by the manual work starting, first tripping main feeder switch is confirmed switch during tripping, satisfy switch criterion after, subsequent use feeder switch closes; Normal series connection is switched to be had fast, homophase or three kinds of implementations of switching under the criterion of residual voltage, and no disturbance stabilization control device switches fast and changes homophase or residual voltage switching implementation when unsuccessful automatically over to; If the subsequent use feeder switch in starting back does not close, device will send handoff failure and device block signal simultaneously in locking;
Simultaneously during switching mode, by main feeder upper level main protection starting, jump the main feeder switch earlier in accident, satisfying when switching criterion, subsequent use feeder switch closes; Accident is switched simultaneously to be had fast, homophase, residual voltage or four kinds of implementations of switching under the criterion of long delay, and no disturbance stabilization control device switches fast and changes homophase, residual voltage or long delay switching when unsuccessful automatically over to; If the subsequent use feeder switch in starting back does not close, device will send handoff failure and device block signal simultaneously in locking; If starting main feeder switch not tripping, device will be sent out handoff failure and device block signal simultaneously decoupling;
When accident series connection switching mode, by main feeder upper level main protection starting, first tripping main feeder switch is confirmed switch during tripping, is satisfying when switching criterion, and subsequent use feeder switch closes; Accident series connection is switched to be had fast, homophase, residual voltage and four kinds of switching implementations of switching under the criterion of long delay, no disturbance stabilization control device switch fast change homophase automatically over to when unsuccessful, residual voltage is switched or the long delay switching; If starting back main feeder switch not tripping or subsequent use feeder switch does not close, device will send handoff failure and device block signal simultaneously in locking;
When bus dead electricity low pressure start mode, the bus three-phase line voltage all is lower than setting value and time during greater than setting value, does not then have disturbance stabilization control device starting switching mode and switches simultaneously or the switching of connect, and its switching condition is identical with the accident switching with switch logic;
When switch mis-jumping is stolen the jump-start mode; Cause the tripping of main feeder or subsequent use feeder switch mistake; No disturbance stabilizing arrangement is after satisfying the switching criterion; Close subsequent use feeder line or main feeder switch, switch mis-jumping has fast, homophase, residual voltage and four kinds of switching implementations of switching under the criterion of long delay, and device switches fast and changes homophase, residual voltage or long delay automatically over to when unsuccessful and switch; If starting subsequent use feeder line in back or main feeder switch do not close, device will be sent out handoff failure and device block signal simultaneously in locking.
Quick switching in the said switching implementation is to start moment in switching; Parameter like main feeder and subsequent use feeder line then can be switched within the definite value scope fast; Be that phase angle difference, difference on the frequency between main feeder and subsequent use feeder line remains within the definite value scope; Adopt high-speed switch to switch less than 0.2S switching time fast;
It is when phase angle difference is zero that homophase in the said switching implementation switches; Realize switching; Device is based on the Changing Pattern of real-time frequency, phase angle, amplitude; Calculate the time when bus residual voltage and the backup power source voltage vector phase coincidence first time, closing circuit is during total time around when this, and sending closes a floodgate orders;
It is to decay to the switching that realizes after the 20%-40% rated voltage when the bus residual voltage that residual voltage in the said switching implementation is switched; Residual voltage is switched as the reserve function of switching fast and homophase switches; The starting with the condition of original feeder line separating brake with the homophase switching mode is identical first, be subsequent use feeder line the combined floodgate condition and the homophase switching mode is different first.Have only when busbar voltage decays to certain permissible value, subsequent use feeder line just can close.Need not criterion phase angle or difference on the frequency during combined floodgate, this is nonsynchronous switching mode, can guarantee device security though residual voltage is switched, because interruption duration is long, equipment self-starting success or not, self-starting time etc. all will receive than limitations.
Long delay in the said switching implementation switch be before the time of setting finishes, can't satisfy fast, in the same way or during the above-mentioned any switching criterion of residual voltage; Carrying out time-delay switches; The control of long delay time is switched only as the safe spare mode; Normal condition does not have the disturbance stabilization control device under the parameter of setting, and is this switching mode not to take place, and has only usually when in the short time fault taking place simultaneously repeatedly and just this switching mode possibly take place.
The invention has the beneficial effects as follows and to avoid when power supply switches, causing working voltage to interrupt or the equipment impact failure, simplify the power supply handover operation and reduce misoperation, to guarantee the continuous continuity operation of power consumption equipment.
Description of drawings
Fig. 1 is the hardware configuration sketch map of the embodiment of the invention.
Fig. 2 is the power supply primary system sketch of the embodiment of the invention.
Fig. 3 is residual voltage characteristic of the present invention and possible switching position sketch map.
Fig. 4 does not stablize changing method step sketch for the present invention has disturbance.
Fig. 5 is the parallelly connected switch logic figure of the artificial starting of the present invention.
Fig. 6 is the artificial starting of the present invention while switch logic figure.
Fig. 7 is the artificial starting series connection of the present invention switch logic figure.
Fig. 8 is switch logic figure of improper starting while of accident of the present invention.
Fig. 9 is the improper starting series connection of accident of the present invention switch logic figure.
Figure 10 is the jump-start switch logic figure of stealing of the present invention.
Wherein: 1DL, 3DL-main feeder killer switch, 2DL, the subsequent use feeder line killer switch of 4DL-, 5DL-bus switch.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are further described:
As shown in Figure 1; The changing method of the embodiment of the invention is through adopting the host CPU module and realizing from the no disturbance stabilization control device of two CPU modules of CPU module; Accomplish major functions such as measurement, logic and switching respectively; And accomplish miscellaneous functions such as demonstration, communication, printing, carry out exchanges data between master and slave CPU module.Master and slave CPU module is accomplished analog quantity and switching value is measured, calculates, judged; The result signal is exported through light-coupled isolation, will convert small-signal into through high-precision current output type voltage, current transformer isolation, filtering from voltage, the current signal that on-the-spot PT, CT come and supply host CPU to use.Various signals are exported with relay idle contact mode, can connect alarm window, DCS system or other smart machine; Various switching value signals (idle contact) convert the use of small-signal confession host CPU into through relay and the isolation of photoelectricity two-stage; The outlet breaker tripping and closing instruction that host CPU sends is merged after photoelectricity isolation and auxiliary relay isolation amplification by logical groups is exported by the dry-reed relay idle contact.
The power supply primary system of present embodiment adopts the double-fed line to add female configuration operation mode that joins, and is as shown in Figure 2, is in view of redundant reason, and electric load is distributed in two sections buses.The female couplet comprises bus I section, bus II section and bus switch, is in gate-dividing state under the bus switch normal condition between two sections buses, and main feeder and subsequent use feeder line killer switch all are in "on" position; In case one feeder line breaks down, switching is between the killer switch of fault feeder and bus switch, to carry out: faulty line killer switch separating brake, and the bus switch closes a floodgate, and after the handover success, two buses are supplied power by a feeder line.In case the fault on the feeder line of tripping just can return to initial power supply state through the changing method of artificial start mode after getting rid of.After the present embodiment changing method starting, switch with the shortest time, and can not bring any danger to the user in switching, changing method can be from arbitrary feeder line starting, no matter faulty line is main feeder or subsequent use feeder line.
The start mode of present embodiment changing method and switching mode are divided into following several kinds of situation, like Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 and shown in Figure 10:
One, normally switches start mode
When normal switching refers to system's operate as normal, manual switching main feeder and subsequent use feeder switch.The normal switching is two-way, can be by the subsequent use feeder line in main feeder tangential, and also can be by subsequent use feeder line tangential main feeder.This function is started by manual work, on control desk, DCS system or device panel, all can carry out.The normal switching can carry out normal switching mode, normal parallelly connected switching mode or the switching mode of normally connecting simultaneously under the start mode.
As shown in Figure 6, normal switching mode simultaneously refers to the artificial switching simultaneously of starting, and jumps main feeder (subsequent use feeder line) switch earlier, and after satisfying the switching criterion, subsequent use feeder line (main feeder) switch closes.Normally switching simultaneously has: fast, homophase, three kinds of switching implementations of switching under the criterion of residual voltage, no disturbance stabilization control device switches fast and changes homophase or residual voltage switching when unsuccessful automatically over to.If the not tripping of main feeder (subsequent use feeder line) switch, device will be decoupled and sent out handoff failure and device block signal simultaneously; If starting back subsequent use feeder line (main feeder) switch does not close, device is sent out handoff failure and device block signal simultaneously with locking.
As shown in Figure 7, normal series connection is switched and is referred to that artificial starting switches, and first tripping main feeder (subsequent use feeder line) switch is confirmed switch during tripping, satisfy switch criterion after, subsequent use feeder line (main feeder) switch closes.Switching is normally arranged simultaneously, fast, three kinds of switching implementations of switching under the criterion of homophase, residual voltage first, cut soon and change first homophase when unsuccessful automatically over to or residual voltage is switched.If starting back subsequent use feeder line (main feeder) switch does not close, device is sent out handoff failure and device block signal simultaneously with locking.
As shown in Figure 5, normal parallel connection switching refers to by the manual work starting, if parallelly connected switching condition also can carry out parallelly connected automatic switching mode or parallelly connected semi-automatic switching mode when satisfying;
When parallelly connected automatic switching mode; No disturbance stabilization control device is with subsequent use feeder line (main feeder) switch that closes earlier; Automatic again tripping main feeder (subsequent use feeder line) switch; If the parallelly connected switching condition in starting back does not satisfy, subsequent use feeder line (main feeder) switch does not close or the not tripping of main feeder (subsequent use feeder line) switch, device will send handoff failure and device block signal simultaneously in locking;
When the semi-automatic switching mode of parallel connection; Subsequent use feeder line (main feeder) switch that closes, and the operation of tripping main feeder (subsequent use feeder line) switch is accomplished by manual work, if in the time of adjusting; Manual work is the tripping main feeder not yet; No disturbance stabilization control device will send handoff failure and device block signal simultaneously in locking, if the parallelly connected switching condition in starting back does not satisfy or subsequent use feeder switch does not close, device will be sent out handoff failure and device block signal simultaneously in locking;
Two, accident is switched start mode
The accident switching refers to main feeder (subsequent use feeder line) upper level main protection contact starting (refer to transformer or send out change group differential protection etc.); It is two-way that accident is switched; Can be by the subsequent use feeder line in main feeder tangential; Also can be by subsequent use feeder line tangential main feeder, accident is switched can carry out accident switching mode or accident series connection switching mode simultaneously under the start mode.
As shown in Figure 8, accident is switched by main feeder (subsequent use feeder line) upper level main protection starting simultaneously, jumps main feeder (subsequent use feeder line) switch earlier, and when satisfying the switching criterion, subsequent use feeder line (main feeder) switch closes.Switching simultaneously has: fast, homophase, residual voltage, four kinds of implementations of switching under the criterion of long delay, no disturbance stabilization control device switch fast change homophase automatically over to when unsuccessful, residual voltage is switched or the long delay switching.If starting back subsequent use feeder line (main feeder) switch does not close, device is sent out handoff failure and device block signal simultaneously with locking.If the not tripping of starting back main feeder (subsequent use feeder line) switch, device will be decoupled and sent out handoff failure and device block signal simultaneously.
As shown in Figure 9, accident series connection is switched, and by main feeder (subsequent use feeder line) upper level main protection starting, first tripping main feeder (subsequent use feeder line) switch is confirmed switch during tripping, is satisfying when switching criterion, and subsequent use feeder line (main feeder) switch closes.Series connection is switched to be had: fast, homophase, residual voltage, four kinds of implementations of switching under the criterion of long delay first, cut soon and change first that homophase, residual voltage are switched and long delay switches when unsuccessful automatically over to.If the not tripping of starting back main feeder (subsequent use feeder line) switch, subsequent use feeder line (main feeder) switch do not close, device is sent out handoff failure and device block signal simultaneously with locking.
Three, improper switching start mode
Improper switching start mode detects starting voluntarily after the improper situation by device, and improper switching is two-way, can be by the subsequent use feeder line in main feeder tangential, and also can be by subsequent use feeder line tangential main feeder.Can carry out the low pressure switching mode under the improper start mode and jump switching mode steathily.
During the low pressure switching mode, when the bus three-phase line voltage all is lower than voltage setting value and time during greater than the time setting value, carry out then that low pressure is switched simultaneously or the low pressure series connection is switched, its switching condition and switch logic with protect the accident switching mode of starting identical.
Shown in figure 10, when jumping switching mode steathily, because of a variety of causes (comprising that the people is misoperation) causes main feeder (subsequent use feeder line) switch mis-jumping to open, device is after satisfying the switching criterion, and subsequent use feeder line (main feeder) switch closes.This switching has: fast, homophase, residual voltage, four kinds of switching implementations of switching under the criterion of long delay, no disturbance stabilization control device switch fast change homophase automatically over to when unsuccessful, residual voltage is switched and the long delay switching.If starting back subsequent use feeder line (main feeder) switch does not close, device is sent out handoff failure and device block signal simultaneously with locking.
The changing method of present embodiment; All the time the voltage that compares busbar voltage and subsequent use feeder line through the master-slave cpu module; Amplitude, difference on the frequency, phase angle difference to tested voltage are carried out following synchronous judgment: this phase angle difference refers to the phase angle difference between busbar voltage and the subsequent use feeder voltage; The phase angle difference dividing value that constitutes synchronous criterion can be adjusted respectively according to leading or hysteresis busbar voltage, and dispatching typical dividing value is that difference on the frequency is less than ± 30 °; The difference on the frequency of busbar voltage and subsequent use feeder voltage has reacted the running after power consumption equipment and the dynamic load outage thereof and has indicated whether to allow to carry out, and confirms as common dividing value 1Hz; The voltage of subsequent use feeder line is another important criterion of switching, has only when feeder voltage exists and can carry out switching, and the minimum standby voltage of present embodiment is adjusted is 80% of normal voltage; Busbar voltage also plays an important role when confirming switching mode, if bus voltage value is lower than setting voltage value, does not then allow to switch, and the setting voltage value of present embodiment is set at 70% of normal voltage value.
Like Fig. 3, shown in Figure 4, based on above-mentioned criterion condition and different change action states, the switching mode of present embodiment changing method passes through to select following implementation to realize, switching fast, homophase switch, residual voltage is switched or long delay switches,
Switch fast: within the definite value scope, just can switch fast like the phase angle difference between main feeder and subsequent use feeder line, difference on the frequency.Fast switching time should be less than 0.2S, thereby adopts high-speed switch to switch.Switch fast and define by the phase angle usually; The choosing value is 55 °; If the intrinsic closing time of switch is 100ms; Angle when the order of then closing a floodgate is sent need shift to an earlier date 35 ° approximately, promptly can realize 20 ° of backup power source voltage and bus residual voltage vector angles with interior quick switching, and the while is safe for equipment.
Homophase switches: promptly when phase angle difference is zero; Realize switching; When device switches based on the Changing Pattern of real-time frequency, phase angle, amplitude; Calculate the time when bus residual voltage and the backup power source voltage vector phase coincidence first time, closing circuit is during total time around when this, and sending closes a floodgate orders.Realize accurately the i.e. homophase first of zero crossing, and not influenced by load variations, very favourable to the self-starting of equipment, homophase switches the reserve function of switching as fast.
Residual voltage is switched: when residual voltage decays to the switching that realizes after the 20%-40% rated voltage, residual voltage is switched as the reserve function of switching fast with the homophase switching.The starting with the condition of original feeder line separating brake with the homophase switching mode is identical first, be subsequent use feeder line the combined floodgate condition and the homophase switching mode is different first.Have only when busbar voltage decays to certain permissible value, subsequent use feeder line just can close.Need not criterion phase angle or difference on the frequency during combined floodgate, this is nonsynchronous switching mode.
Long delay switches: if before the time of a setting finishes, can't carry out above-mentioned any quick switching mode, can carry out time-delay and switching.For this reason, time control switching mode is only as the safe spare mode.Normal condition is this switching mode not to take place under the parameter of setting.Have only when in the short time fault taking place simultaneously repeatedly and just this switching mode possibly take place.
Starting after accelerated protection step is when switching to subsequent use feeder switch, to export a pair of idle contact simultaneously, is used to drop into the after accelerated protection function of subsequent use feeder line branch protective device, and the junction closure duration is 5 seconds.Totally three pairs of starting post acceleration idle contacts, respectively corresponding main feeder protection, subsequent use protection for feed line and female couplet protection.
In the locking and alert step of present embodiment changing method; The protection locking is miscarried into fault bus for preventing subsequent use feeder line; Changing method provides the protection locking to open into the amount interface loop through device, when some protection action, like overcurrent, arclight bus protection etc.; Device provides the locking outlet loop simultaneously " protection locking " signal and waits for involution.
Go out atretostomia when device drops into because of soft pressing plate input or control desk locking device, device is with the locking outlet and provide the outlet block signal, as installs that soft pressing plate withdraws from or during the control desk unlocking, device will automatically terminate locking, resume operation.Install that soft pressing plate comprises that outlet drops into/withdraw from and install that quick switching, homophase are switched, residual voltage is switched, long delay switches and drops into respectively or withdraw from.
Unusually reach in the uncoupling step in the position of the switch; Device ceaselessly the state of all switches is checked, as it is unusual to detect the position of the switch when normal operation; When promptly not satisfying the ready condition of the moving stabilization control device of unperturbed; Device exports locking, sends out position of the switch abnormal signal simultaneously, except the operating switch mistake is jumped.In the handoff procedure as the switch of finding this jumping in the certain hour not tripping maybe this switch that closes do not close, the malposition block signal handled and provided to device will respectively based on different switching modes.As: in switch simultaneously, if the switch of this tripping is failed tripping, will cause two power supplys arranged side by side, device will be carried out the uncoupling function, the switch that tripping has just been closed this moment.At this moment, will not respond any peripheral operation and initiating signal, and can only artificial involution remove, and still exist like locking or fault, it is just effective to need pending fault or barring condition to eliminate the back involution.
The changing method of present embodiment needs device is carried out the involution operation under following several kinds of situation, in order to move next time: after having carried out the accident switching; After sending block signals such as the position of the switch is unusual, protection locking, PT broken string, and for recovering automatically; After device breaks down.
A kind of station service electrical system of present embodiment does not have disturbance and stablizes changing method and can avoid when power supply switches, causing working voltage to interrupt or the equipment impact failure, simplifies the power supply handover operation and also reduces misoperation, to guarantee the continuous continuity operation of power consumption equipment.
Claims (4)
1. undisturbed stable switching method for industrial enterprise factory electrical system; Switch through comprising between the no disturbance stabilization control device control station service electrical system main feeder of CPU module, power supply module, switching value module, of ac module, direct current module, outlet module, signal module and management module, subsequent use feeder line, the female three of couplet; Load is switched on the subsequent use feeder line; May further comprise the steps, it is characterized in that:
The CPU module detects the circuit breaker switch state in the station service electrical system, discerns automatically that station service electrical system runs on double-fed line mode or the double-fed line adds female mode;
After the CPU module detected the start-up logic signal, starting was normally switched, accident is switched or improper switching start mode;
Switch under the start mode normal; Carry out the switching mode selection that normal parallel connection is switched, normally switched simultaneously or normal series connection is switched; Switch under the start mode in accident; Carry out the switching mode that the improper starting of accident is switched simultaneously or the improper starting series connection of accident is switched and select, under improper switching start mode, carry out improper series connection switching mode;
According to the change action process status; Under normal parallelly connected switching mode, switch through the implementation of quick switching, normal switch simultaneously, normal series connection is switched, the improper starting series connection of accident is switched, the improper starting of accident is switched simultaneously or improper series connection switching mode under carry out friction speed between main feeder, the subsequent use feeder line fast, the implementation switched of homophase, residual voltage or long delay switches;
Said start mode is artificial switching signal under normal switch instances, makes main feeder, subsequent use feeder line, the manual switching between female the couplet; Upper level main protection contact, mother through main feeder or subsequent use feeder line under accident switching, improper switch instances join dead electricity or switch mis-jumping signal; Make the automatic switchover between main feeder and the subsequent use feeder line, the start mode of improper switching is divided into low pressure again and steals the jump-start mode;
Normal parallelly connected switching mode is divided into normal parallelly connected automatic switching mode and normal parallelly connected semi-automatic switching mode again;
Said normal parallelly connected switching mode refers to that artificial starting parallel connection switches, and concrete steps are following, when normal parallelly connected automatic switching mode; No disturbance stabilization control device is with subsequent use feeder line or the main feeder switch of closing earlier; Automatically tripping main feeder or subsequent use feeder switch again, if the parallelly connected switching condition in starting back does not satisfy, subsequent use feeder line or the main feeder switch does not close or main feeder or the not tripping of subsequent use feeder switch, device will send handoff failure and device block signal simultaneously in locking; When normal parallelly connected semi-automatic switching mode; Close subsequent use feeder line or main feeder switch, the operation of tripping main feeder or subsequent use feeder switch is accomplished by manual work, if in the time of adjusting; Manual work is the tripping main feeder not yet; No disturbance stabilization control device will send handoff failure and device block signal simultaneously in locking, if the parallelly connected switching condition in starting back does not satisfy or subsequent use feeder switch does not close, device will be sent out handoff failure and device block signal simultaneously in locking;
Said normal while switching mode refers to artificial starting switching simultaneously; Concrete steps are following, jump earlier main feeder or subsequent use feeder switch, satisfy fast, subsequent use feeder line or main feeder switch close under the switching criterion of homophase or residual voltage; If main feeder or the not tripping of subsequent use feeder switch; Device will be decoupled and sent out handoff failure and device block signal simultaneously, if starting subsequent use feeder line in back or main feeder switch do not close, device is sent out handoff failure and device block signal simultaneously with locking;
Said normal series connection switching mode refers to artificial starting series connection switching, and concrete steps are following, first tripping main feeder or subsequent use feeder switch; Confirm that switch is during tripping; Satisfy fast, first during the switching criterion of homophase or residual voltage, close subsequent use feeder line or main feeder switch switch fast and change first homophase when unsuccessful automatically over to or residual voltage is switched; If starting subsequent use feeder line in back or main feeder switch do not close, device is sent out handoff failure and device block signal simultaneously with locking;
The improper starting of said accident is switched simultaneously; Concrete steps are following, send out to jump the order of main feeder or subsequent use feeder switch, satisfy fast, during the switching criterion of homophase, residual voltage or long delay; Subsequent use feeder line or main feeder switch close; The quick switching changes homophase, residual voltage switching or long delay switching automatically over to when getting nowhere, do not close as if subsequent use feeder line or main feeder switch after the starting, installs in locking and sends out handoff failure simultaneously and install block signal; If starting back main feeder or the not tripping of subsequent use feeder switch, device is sent out handoff failure and device block signal simultaneously decoupling;
The improper starting series connection of said accident is switched; Concrete steps are following; Send out the order of tripping main feeder or subsequent use feeder switch, confirm switch during tripping, satisfy fast, first during the switching criterion of homophase, residual voltage or long delay; Subsequent use feeder line or main feeder switch close; The quick switching changes homophase, residual voltage switching or long delay switching first automatically over to when getting nowhere, do not close as if main feeder or the not tripping of subsequent use feeder switch, subsequent use feeder line or main feeder switch after the starting, installs in locking and sends out handoff failure simultaneously and install block signal;
Said stealing to jump and switch when stealing the jump-start mode; Concrete steps are following; When device satisfied in the switching criterion of quick, homophase, residual voltage or long delay, close subsequent use feeder line or main feeder switch changed homophase, residual voltage switching or long delay automatically over to and switch when switching is unsuccessful fast; If starting subsequent use feeder line in back or main feeder switch do not close, device is sent out handoff failure and device block signal simultaneously in locking.
2. a kind of undisturbed stable switching method for industrial enterprise factory electrical system according to claim 1 is characterized in that: carry out acceleration protection after the subject branch that starting was closed a floodgate when accident was switched.
3. a kind of undisturbed stable switching method for industrial enterprise factory electrical system according to claim 1 and 2 is characterized in that: various switchings are meant from main feeder switches to subsequent use feeder line, perhaps switches to main feeder from subsequent use feeder line.
4. a kind of undisturbed stable switching method for industrial enterprise factory electrical system according to claim 1 and 2 is characterized in that: also comprise locking, warning, measurement demonstration, accident record, record ripple, printing and communication steps.
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| CN2009101835765A CN101728865B (en) | 2009-09-23 | 2009-09-23 | Undisturbed stable switching method for industrial enterprise factory electrical system |
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| CN2009101835765A CN101728865B (en) | 2009-09-23 | 2009-09-23 | Undisturbed stable switching method for industrial enterprise factory electrical system |
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| CN111864882A (en) * | 2020-04-29 | 2020-10-30 | 中科科林节能环保科技有限公司 | Power disturbance-free rapid switching desulfurization power supply system and power supply method |
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| CN114301099A (en) * | 2022-01-04 | 2022-04-08 | 南京大全电气研究院有限公司 | Bus switching method and device, electronic equipment and storage medium |
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