CN101728865A - 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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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 consumers is installed in the electrical network, because electrical network is huge, is subjected to 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, although arc suppression coil is installed, often single-phase earthing takes place after, 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 400V protection is hot coupling, fuse protection often, 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 especially big (sometimes may cause the protection misoperation) often exists that the busbar voltage fluctuation is big, the time is long; For guaranteeing power supply reliability, medium voltage network is paired running for part large enterprise, and any equipment fault all can cause power-supply fluctuation in the system, and the probability that equipment more has more existing voltage pulsation is more high.
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.For the motor in the system; when voltage drops to 70% when following; it is exerted oneself and will drop to below 50%; normally carrying out of technological process will be influenced; 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 (delay time often greater than the overcurrent time by bus loss of pressure; be that switching time is greater than 0.5S, more greater than A.C. contactor dead electricity drop-away time), even handover success just; 0.5S under-voltage protection also moved; when simultaneity factor had in a large number in groups the self-starting motor, often self-starting current big especially (may cause the protection misoperation sometimes) existed the busbar voltage fluctuation big; time is long.As: easily cause synchronous motor 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 residual voltage decay of bus is fast especially, be that 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%, A.C. contactor just disconnects 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.
For 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, will cause the very big hidden danger of production safety, even causes serious production safety accident.
Summary of the invention
The purpose of this invention is to provide a kind of state, with the fastest speed changing method is stablized in the no disturbance that load switches on the extension wire when solving supply line's fault according to station service electrical system.
For realizing purpose of the present invention, the invention provides a kind of undisturbed stable switching method for industrial enterprise factory electrical system, switch by 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, standby feeder line, the female connection three, 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 detects the start-up logic signal, start normally switching, accident switching or the improper flowing mode that switches;
Normally switching under the flowing mode, carrying out the switching mode of normal switching in parallel, normal simultaneously switching or normal series connection switching selects, switch under the Starting mode in accident, carry out the switching mode selection that the improper simultaneously switching of accident or the improper series connection of accident are switched, switch under the flowing mode improper, carry out improper series connection switching mode;
According to the change action process status, under normal switching mode in parallel, switch by 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 standby feeder line fast, the implementation switched of homophase, residual voltage or long delay switches.
Described start mode is artificial switching signal under normal switch instances, makes the manual switching between main feeder, feeder line for subsequent use, the mother; Under accident switching, improper switch instances, by upper level main protection contact, mother dead electricity or the switch mis-jumping signal of main feeder or feeder line for subsequent use, make the automatic switchover between main feeder and the feeder line for subsequent use; The start mode of improper switching is divided into again low pressure and jump start mode.
Normal switching mode in parallel is divided into normal automatic switching mode in parallel and normal semi-automatic switching mode in parallel again.
Carry out acceleration protection after starting the subject branch of closing a floodgate when accident is switched.
Various switchings are meant from main feeder switches to standby feeder line, perhaps switches to main feeder from standby feeder line.
Further comprise locking, warning, measurement demonstration, accident record, record ripple, printing and communication steps.
The described flowing mode that normally switches is when working in system, behind manual switching main feeder and the feeder switch for subsequent use, from two-wayly between main feeder and the feeder line for subsequent use carry out normally in parallelly switching, normal switch simultaneously or switching mode that normal series connection is switched is selected; It is after the upper level main protection contact of main feeder or feeder line for subsequent use starts that described 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 feeder line for subsequent use; Described improper switching is that the self-starting undisturbed stability control device is realized two-way switching between main feeder and the feeder line for subsequent use after low-pressure starting or the starting of switch jump;
When selecting normal switching mode in parallel, by artificial starting, if switching condition in parallel also can carry out automatic switching mode in parallel or semi-automatic switching mode in parallel when satisfying;
When automatic switching mode in parallel, undisturbed stability control device is with the feeder switch for subsequent use that closes earlier, automatic tripping main feeder switch again, if switching condition in parallel does not satisfy after the starting, feeder switch for subsequent use 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, standby feeder switch closes, and the operation of tripping main feeder switch is by manually finishing, if in the time of adjusting, artificial tripping main feeder not yet, no disturbance stabilization control device will send handoff failure and device block signal simultaneously in locking, if starting back switching condition in parallel does not satisfy or standby feeder switch does not close, device will be sent out handoff failure and device block signal simultaneously in locking;
When normal simultaneously switching mode, switched by artificial starting, jump earlier the main feeder switch, after satisfying the switching criterion, the feeder switch for subsequent use that closes, normal switch simultaneously have fast, homophase, three kinds of implementations of switching under the criterion of residual voltage, automatically change homophase over to when undisturbed stability control device is fast unsuccessful or residual voltage is switched implementation, if the not tripping of main feeder switch, device will be sent out handoff failure and device block signal simultaneously in decoupling; Do not close if start feeder switch for subsequent use, device will send handoff failure and device block signal simultaneously in locking;
When normal series connection switching mode, switched by artificial starting, first tripping main feeder switch is confirmed switch during tripping, satisfy switch criterion after, feeder switch for subsequent use 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 undisturbed stability control device switches fast and automatically changes homophase over to when unsuccessful or residual voltage is switched implementation; If feeder switch for subsequent use does not close after the starting, 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 earlier the main feeder switch in accident, satisfying when switching criterion, feeder switch for subsequent use 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 undisturbed stability control device switches fast and automatically changes homophase, residual voltage or delayed transfer when unsuccessful over to; If feeder switch for subsequent use does not close after the starting, device will send handoff failure and device block signal simultaneously in locking; If the not tripping of starting main feeder switch, device will be sent out handoff failure and device block signal simultaneously in 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 feeder switch for subsequent use 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, undisturbed stability control device switch fast automatically change homophase over to when unsuccessful, residual voltage is switched or delayed transfer; If after the starting main feeder switch not tripping or feeder switch for subsequent use do not close, device will send handoff failure and device block signal simultaneously in locking;
When bus dead electricity low-pressure starting mode, the bus three-phase line voltage all is lower than setting valve and time during greater than setting valve, and then undisturbed stability control device starting switching mode is switched or the switching of connect simultaneously, 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 standby feeder switch mistake, no disturbance stabilizing arrangement is after satisfying the switching criterion, standby feeder line or main feeder switch close, switch mis-jumping has fast, homophase, residual voltage and four kinds of switching implementations of switching under the criterion of long delay, device changes homophase, residual voltage or long delay automatically over to when switching is unsuccessful fast and switches, if starting standby 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 described switching implementation is to start moment in switching, parameter such as main feeder and feeder line for subsequent use then can be switched fast at the definite value range, be that phase angle difference, difference on the frequency between main feeder and feeder line for subsequent use remains on the definite value range, 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 described switching implementation switches, realize switching, device is according to 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 described switching implementation is switched, residual voltage is switched as the emergency function that switches fast and homophase switches, start identically with the first phase coincidence switching mode with the condition of original feeder line separating brake, the combined floodgate condition and the first phase coincidence switching mode that are feeder line for subsequent use are different.Only have when busbar voltage decays to certain permissible value, feeder line for subsequent use 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 be subjected to bigger restriction.
Delayed transfer in the described switching implementation 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, the normal condition undisturbed stability control device is under the parameter of setting, be this switching mode not to take place, usually only have when in the short time fault taking place simultaneously repeatedly and just this switching mode may take place.
The invention has the beneficial effects as follows and to avoid when electrical source exchange, causing working voltage to interrupt or the equipment impact failure, simplify the electrical source exchange operation and reduce maloperation, to ensure uninterrupted power for continuous operation.
Description of drawings
Fig. 1 is the hardware configuration schematic diagram 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 schematic diagram.
Fig. 4 stablizes changing method step sketch for undisturbed of the present invention.
Fig. 5 manually starts switch logic figure in parallel for the present invention.
Fig. 6 manually starts switch logic figure simultaneously for the present invention.
Fig. 7 manually starts series connection switch logic figure for the present invention.
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 jump starting switch logic figure of the present invention.
Wherein: 1DL, 3DL-main feeder killer switch, the standby feeder line killer switch of 2DL, 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 by adopting the host CPU module and realizing from the no disturbance stabilization control device of two CPU modules of CPU module, finish major functions such as measurement, logic and switching respectively, and finish miscellaneous functions such as demonstration, communication, printing, carry out exchanges data between master and slave CPU module.Master and slave CPU module is finished analog quantity and switching value is measured, calculates, judged, the result signal is exported through light-coupled isolation, will be converted to small-signal and use for host CPU through high-precision current output type voltage, current transformer Isolation from voltage, the current signal that on-the-spot PT, CT come.Various signals are exported in relay idle contact mode, can connect alarm window, DCS system or other smart machine; Various switching value signals (idle contact) are isolated through relay and photoelectricity two-stage and are converted to small-signal and use for host CPU; 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 the configuration operation mode of mother, as shown in Figure 2, is the reason in view of redundancy, and electric load is distributed in two sections buses.Female connection 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 standby feeder line killer switch all are in "on" position; In case one feeder line breaks down, switching is to carry out between the killer switch of fault feeder and bus switch: faulty line killer switch separating brake, and the bus switch closes a floodgate, and after the handover success, two buses are powered by a feeder line.In case the fault on the feeder line of just tripping can return to by the changing method of artificial start mode initial power supply state 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 feeder line for subsequent use.
The start mode of present embodiment changing method and switching mode are divided into following several situation, as Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 and shown in Figure 10:
One, normally switches flowing mode
When normal switching refers to system's normal operation, manual switching main feeder and feeder switch for subsequent use.The normal switching is two-way, can be by the tangential standby feeder line of main feeder, and also can be by the tangential main feeder of standby feeder line.This function all can be carried out on control desk, DCS system or device panel by artificial starting.Normally switch and to carry out normal simultaneously switching mode, normal switching mode in parallel or the switching mode of normally connecting under the flowing mode.
As shown in Figure 6, normal while switching mode refers to simultaneously switching of artificial starting, jumps earlier main feeder (feeder line for subsequent use) switch, and after satisfying the switching criterion, feeder line for subsequent use (main feeder) switch closes.Normally switching simultaneously has: fast, homophase, three kinds of switching implementations of switching under the criterion of residual voltage, undisturbed stability control device switches fast and automatically changes homophase over to when unsuccessful or residual voltage is switched.If the not tripping of main feeder (feeder line for subsequent use) switch, device is sent out handoff failure and device block signal simultaneously with decoupling; If feeder line for subsequent use (main feeder) switch does not close after the starting, 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 (feeder line for subsequent use) switch is confirmed switch during tripping, satisfy switch criterion after, feeder line for subsequent use (main feeder) switch closes.Switching is normally arranged simultaneously, fast, first phase coincidence, three kinds of switching implementations of switching under the criterion of residual voltage, cut soon and automatically change first phase coincidence over to when unsuccessful or residual voltage is switched.If feeder line for subsequent use (main feeder) switch does not close after the starting, device is sent out handoff failure and device block signal simultaneously with locking.
As shown in Figure 5, normal in parallel the switching refers to by artificial starting, if switching condition in parallel also can carry out automatic switching mode in parallel or semi-automatic switching mode in parallel when satisfying;
When automatic switching mode in parallel, no disturbance stabilization control device is with standby feeder line (main feeder) switch that closes earlier, automatic again tripping main feeder (standby feeder line) switch, if starting back switching condition in parallel does not satisfy, standby feeder line (main feeder) switch does not close or the not tripping of main feeder (standby feeder line) switch, device will send handoff failure and device block signal simultaneously in locking;
When the semi-automatic switching mode of parallel connection, standby feeder line (main feeder) switch closes, and the operation of tripping main feeder (standby feeder line) switch is by manually finishing, if in the time of adjusting, artificial tripping main feeder not yet, no disturbance stabilization control device will send handoff failure and device block signal simultaneously in locking, if starting back switching condition in parallel does not satisfy or standby 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 (standby 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 tangential standby feeder line of main feeder; also can be by the tangential main feeder of standby feeder line, 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 simultaneously by main feeder (standby feeder line) upper level main protection starting, jumps main feeder (standby feeder line) switch earlier, and when satisfying the switching criterion, standby 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, undisturbed stability control device switch fast automatically change homophase over to when unsuccessful, residual voltage is switched or delayed transfer.If feeder line for subsequent use (main feeder) switch does not close after the starting, device is sent out handoff failure and device block signal simultaneously with locking.If not tripping of main feeder (feeder line for subsequent use) switch after the starting, device is sent out handoff failure and device block signal simultaneously with decoupling.
As shown in Figure 9, accident series connection is switched, and by main feeder (standby feeder line) upper level main protection starting, first tripping main feeder (standby feeder line) switch is confirmed switch during tripping, is satisfying when switching criterion, and standby feeder line (main feeder) switch closes.Series connection is switched to be had: fast, first phase coincidence, residual voltage, four kinds of implementations of switching under the criterion of long delay, cut soon and automatically change first phase coincidence over to when unsuccessful, residual voltage is switched and delayed transfer.If not tripping of main feeder (feeder line for subsequent use) switch after the starting, feeder line for subsequent use (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 tangential standby feeder line of main feeder, and also can be by the tangential main feeder of standby feeder line.Can carry out low pressure switching mode and jump switching mode under the improper start mode.
During the low pressure switching mode, when the bus three-phase line voltage all is lower than voltage setting valve and time during greater than the time setting value, carry out then that low pressure is switched simultaneously or low voltage series switches, its switching condition is identical with the accident switching mode of protection starting with switch logic.
As shown in figure 10, when jumping switching mode steathily, because of a variety of causes (comprising that the people is misoperation) causes main feeder (standby feeder line) switch mis-jumping to open, device is after satisfying the switching criterion, and standby 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, undisturbed stability control device switch fast automatically change homophase over to when unsuccessful, residual voltage is switched and delayed transfer.If feeder line for subsequent use (main feeder) switch does not close after the starting, 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 standby feeder line by the master-slave cpu module, amplitude, difference on the frequency, phase angle difference to tested voltage are carried out following synchronous judgement: this phase angle difference refers to the phase angle difference between busbar voltage and the standby 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 standby 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 is defined as common dividing value 1Hz; The voltage of standby 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 determining 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.
As shown in Figure 3, Figure 4, according to above-mentioned criterion and different change action states, the switching mode of present embodiment changing method passes through to select following implementation to realize, fast switching, homophase switch, residual voltage is switched or delayed transfer,
Switch fast:, just can switch fast at the definite value range such as the phase angle difference between main feeder and feeder line for subsequent use, 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, be safe for equipment simultaneously.
Homophase switches: namely when phase angle difference is zero, realize switching, when device switches according to 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 that accurately zero crossing is first phase coincidence, and not affected by load variations that very favourable to the self-starting of equipment, homophase switches the emergency function that switches 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 switching fast and the emergency function of homophase switching.The starting and the condition of original feeder line separating brake with the homophase switching mode is identical first, be standby feeder line the combined floodgate condition and the homophase switching mode is different first.Only have when busbar voltage decays to certain permissible value, feeder line for subsequent use just can close.Need not criterion phase angle or difference on the frequency during combined floodgate, this is nonsynchronous switching mode.
Delayed transfer: if before the time of setting finishes, can't carry out above-mentioned any fast transfer mode, can carry out time-delay and switch.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 may take place.
Starting after accelerated protection step is when switching to standby feeder switch, to export a pair of idle contact simultaneously, is used to drop into the after accelerated protection function of standby 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, standby protection for feed line and female connection protection.
In the locking and alarming step of present embodiment changing method; protection blocking miscarries into fault bus for preventing feeder line for subsequent use; changing method provides protection blocking intake interface loop by device; when some protection action; such as overcurrent, arclight bus protection etc.; device provides the locking outlet loop simultaneously " protection blocking " signal and waits for involution.
Go out atretostomia and drop into because of soft pressing plate or console blocking device when dropping into when device, device is with the locking outlet and provide the outlet block signal, as installs that soft pressing plate withdraws from or during the console unlocking, device will automatically terminate locking, resume operation.Install soft pressing plate and comprise that outlet drops into/withdraw from and install that quick switching, homophase are switched, residual voltage is switched, delayed transfer drops into respectively or withdraw from.
Unusually reach in the uncoupling step in the position of the switch, device is when normal operation, ceaselessly the state to all switches checks, as it is unusual to detect the position of the switch, when namely not satisfying the ready condition of undisturbed stability control device, device exports locking, sends out simultaneously position of the switch abnormal signal, except the operating switch false tripping.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 be processed respectively and be provided to device will according to different switching modes.As: in switch switching 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, manually involution is removed, and still exists as locking or fault, and 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 in following several situations, in order to move next time: after having carried out the accident switching; After sending the block signals such as the position of the switch is unusual, protection blocking, PT broken string, and for can not automatically recovering; After device breaks down.
A kind of station service electrical system undisturbed of present embodiment is stablized changing method and can be avoided causing when electrical source exchange working voltage to interrupt or the equipment impact failure, simplifies the electrical source exchange operation and reduces maloperation, to ensure uninterrupted power for continuous operation.
Claims (6)
1. undisturbed stable switching method for industrial enterprise factory electrical system, switch by 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, standby feeder line, the female connection three, load is switched on the extension wire, 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 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 detects the start-up logic signal, start normally switching, accident switching or the improper flowing mode that switches;
Normally switching under the flowing mode, carrying out the switching mode of normal switching in parallel, normal simultaneously switching or normal series connection switching selects, switch under the Starting mode in accident, carry out the switching mode selection that the improper simultaneously switching of accident or the improper series connection of accident are switched, switch under the flowing mode improper, carry out improper series connection switching mode;
According to the change action process status, under normal switching mode in parallel, switch by 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 standby feeder line fast, the implementation switched of homophase, residual voltage or long delay switches.
2. a kind of undisturbed stable switching method for industrial enterprise factory electrical system according to claim 1 is characterized in that: described start mode is artificial switching signal under normal switch instances, makes the manual switching between main feeder, standby feeder line, the female connection; Under accident switching, improper switch instances,, make the automatic switchover between main feeder and the standby feeder line by the upper level main protection contact of main feeder or standby feeder line, female connection dead electricity or switch mis-jumping signal; The start mode of improper switching is divided into low pressure again and steals the jump-start mode.
3. a kind of undisturbed stable switching method for industrial enterprise factory electrical system according to claim 1 is characterized in that: normal switching mode in parallel is divided into again normal automatic switching mode in parallel and normal semi-automatic switching mode in parallel.
4. a kind of undisturbed stable switching method for industrial enterprise factory electrical system according to claim 1 and 2 is characterized in that: carry out acceleration protection after starting the subject branch of closing a floodgate when accident is switched.
5. according to claim 1 or 2 or 3 described a kind of undisturbed stable switching method for industrial enterprise factory electrical system, it is characterized in that: various switchings refer to switch to feeder line for subsequent use from main feeder, perhaps switch to main feeder from feeder line for subsequent use.
6. according to claim 1 or 2 or 3 described a kind of undisturbed stable switching method for industrial enterprise factory electrical system, it is characterized in that: also comprise locking, warning, measurement demonstration, accident record, record ripple, printing and communication steps.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103023133A (en) * | 2012-12-04 | 2013-04-03 | 施耐德万高（天津）电气设备有限公司 | Dual power supply automatic changeover gear controller |
| CN103166249A (en) * | 2011-12-14 | 2013-06-19 | 深圳市康必达中创科技有限公司 | Safe and stable control method of quick grid-connected system |
| CN103715761A (en) * | 2013-12-24 | 2014-04-09 | 施耐德万高（天津）电气设备有限公司 | Automatic change-over switch apparatus with switch-opening prevention function |
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| CN104659784A (en) * | 2015-01-26 | 2015-05-27 | 国网浙江海盐县供电公司 | Device for suppressing voltage fluctuation of bus in transformer substation and voltage fluctuation suppression method |
| CN105391165A (en) * | 2015-12-29 | 2016-03-09 | 国家电网公司 | Inlet wire emergency power supply automatic switch-in control method and system |
| CN106374613A (en) * | 2016-09-07 | 2017-02-01 | 神华集团有限责任公司 | Switching method and device of desulfurization power supply in power plant |
| CN110011593A (en) * | 2017-12-29 | 2019-07-12 | 通力股份公司 | Safe circuit board for passenger traffic facility |
| CN110504683A (en) * | 2019-08-20 | 2019-11-26 | 国家能源集团宁夏煤业有限责任公司 | The control method and control system of grid switching operation |
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| CN110829390A (en) * | 2019-11-28 | 2020-02-21 | 国网江苏省电力有限公司镇江供电分公司 | 110kV wire break protection method for measuring load side voltage and matching with spare power automatic switching |
| 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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| CN103166249B (en) * | 2011-12-14 | 2016-03-16 | 深圳市康必达中创科技有限公司 | A kind of rapid combination system safety stable control method |
| CN103166249A (en) * | 2011-12-14 | 2013-06-19 | 深圳市康必达中创科技有限公司 | Safe and stable control method of quick grid-connected system |
| CN103023133A (en) * | 2012-12-04 | 2013-04-03 | 施耐德万高（天津）电气设备有限公司 | Dual power supply automatic changeover gear controller |
| CN103715761A (en) * | 2013-12-24 | 2014-04-09 | 施耐德万高（天津）电气设备有限公司 | Automatic change-over switch apparatus with switch-opening prevention function |
| CN104135064A (en) * | 2014-08-06 | 2014-11-05 | 沈阳天鹰工控科技有限公司 | Grid connection switching device for auxiliary power |
| CN104659784B (en) * | 2015-01-26 | 2018-04-06 | 国网浙江海盐县供电公司 | A kind of transformer station suppresses busbar voltage fluctuation device and voltage pulsation suppressing method |
| CN104659784A (en) * | 2015-01-26 | 2015-05-27 | 国网浙江海盐县供电公司 | Device for suppressing voltage fluctuation of bus in transformer substation and voltage fluctuation suppression method |
| CN105391165A (en) * | 2015-12-29 | 2016-03-09 | 国家电网公司 | Inlet wire emergency power supply automatic switch-in control method and system |
| CN106374613A (en) * | 2016-09-07 | 2017-02-01 | 神华集团有限责任公司 | Switching method and device of desulfurization power supply in power plant |
| CN110011593A (en) * | 2017-12-29 | 2019-07-12 | 通力股份公司 | Safe circuit board for passenger traffic facility |
| CN110504683A (en) * | 2019-08-20 | 2019-11-26 | 国家能源集团宁夏煤业有限责任公司 | The control method and control system of grid switching operation |
| CN110676823A (en) * | 2019-11-28 | 2020-01-10 | 国网江苏省电力有限公司镇江供电分公司 | 110kV line disconnection relay protection method |
| CN110829390A (en) * | 2019-11-28 | 2020-02-21 | 国网江苏省电力有限公司镇江供电分公司 | 110kV wire break protection method for measuring load side voltage and matching with spare power automatic switching |
| CN110829390B (en) * | 2019-11-28 | 2020-11-10 | 国网江苏省电力有限公司镇江供电分公司 | 110kV wire break protection method for measuring load side voltage and matching with spare power automatic switching |
| CN110676823B (en) * | 2019-11-28 | 2021-03-02 | 国网江苏省电力有限公司镇江供电分公司 | 110kV line disconnection relay protection method |
| 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 |
| CN112850489A (en) * | 2021-01-06 | 2021-05-28 | 中联重科股份有限公司 | Control system for pin telescoping mechanism and engineering machine |
| 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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