CN204068248U - Control protection processing equipment for direct current engineering operation in grounding electrode-free mode - Google Patents
Control protection processing equipment for direct current engineering operation in grounding electrode-free mode Download PDFInfo
- Publication number
- CN204068248U CN204068248U CN201420579911.XU CN201420579911U CN204068248U CN 204068248 U CN204068248 U CN 204068248U CN 201420579911 U CN201420579911 U CN 201420579911U CN 204068248 U CN204068248 U CN 204068248U
- Authority
- CN
- China
- Prior art keywords
- pole
- control mechanism
- control
- valve group
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001360 synchronised effect Effects 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000010304 firing Methods 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 description 11
- 230000007812 deficiency Effects 0.000 description 5
- 230000009191 jumping Effects 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- GIIZNNXWQWCKIB-UHFFFAOYSA-N Serevent Chemical class C1=C(O)C(CO)=CC(C(O)CNCCCCCCOCCCCC=2C=CC=CC=2)=C1 GIIZNNXWQWCKIB-UHFFFAOYSA-N 0.000 description 1
- 244000098338 Triticum aestivum Species 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
Abstract
A control protection processing device for direct current engineering operation in a grounding electrode-free mode is provided with a human-computer exchange interface serving as a command mechanism, a direct current station control system for forcibly setting the interlocking condition of an in-station grounding switch to be satisfied and judging the connection state of a grounding electrode independently, a direct current pole control system and a direct current protection system for performing grounding protection, wherein the direct current station control system is provided with a station control mechanism, the direct current pole control system is provided with a pole one pole control mechanism, a pole two pole control mechanism, a pole one valve group controller and a pole two valve group controller, and is further provided with a bipolar synchronous unlocking/locking mechanism, a bipolar current following mechanism and a bipolar united tripping mechanism. The utility model provides a direct current engineering use in-station grounding grid keep the difficult problem of bipolar balanced operation when the earthing pole, the science is effective, can satisfy the demand that the engineering was used.
Description
Technical field
The utility model relates to technical field of power systems, particularly the Control protection treatment facility that runs of a kind of DC engineering no ground pole mode.
Background technology
Earth electrode is the important component part of customary DC engineering, not only play the effect clamping down on DC point current potential, also for direct current monopolar ground circuit operation mode, bipolar two-terminal-grounding mode provide the path returned as electric current using the earth, if therefore there is no earth electrode, although direct current can clamp down on DC point current potential by ground network in station, but can not with the earth as current return path, if there is one pole locking when therefore DC bipolar runs, then direct current will not have commutating circuit and cause bipolar locking.Direct current will can not bipolarly run usually, and can only run in monopolar metallic return mode, and this will cause direct current conveying capacity to reduce half, greatly affect the availability factor of DC engineering.
In Practical Project, because a variety of causes can exist in time or cannot cannot build up the situation of earth electrode, must rectification side to use in station ground network temporarily as earth electrode to keep DC bipolar balance movement to improve the ability of supplying electric power of general emigrant's direct current.But, under existing technical conditions, when rectification side uses ground network as earth point, because ground grid design principle is different from earth electrode, one pole the earth operational mode cannot be used for.In addition, for reducing earth current and duration as much as possible, the unblocking of the two poles of the earth must be made, emergency outage completes within the time short as far as possible; Consider the galvano-cautery of earth current to ground network simultaneously, cathode protection method must be adopted to protect ground network, and prior art all cannot meet above-mentioned requirements at present.
Therefore, not enough for prior art, provide that a kind of to be applicable to the control treatment equipment that DC engineering no ground pole mode runs very necessary to overcome prior art deficiency.
Summary of the invention
For overcoming the deficiencies in the prior art, the utility model provides a kind of DC engineering no ground pole Control protection treatment facility that mode is run, and can solve DC engineering and use the interior ground network in station temporarily as the difficult problem keeping bipolar balance movement during earth electrode.
Above-mentioned purpose of the present utility model is realized by following technology technical scheme:
A kind of DC engineering no ground pole Control protection treatment facility that mode is run is provided,
The Control protection treatment facility that a kind of DC engineering no ground pole mode is run; be provided with as the alternating interface between man and computer of order mechanism, earthed switch chain condition in station is set to meet by force and judged separately by converting plant operating mode earth electrode connection status direct current station Ore-controlling Role, DC pole control system and carry out the DC protection system of ground protection
Described direct current station Ore-controlling Role is provided with station control mechanism, described DC pole control system is provided with pole, pole one control mechanism, pole, pole two control mechanism, pole one valve group controller, pole two valve group controller, is also provided with bipolar synchronous solution/blocking mechanism, bipolar current tracking mechanism and bipolar chaser structure.
Above-mentioned bipolar synchronous solution/blocking mechanism is provided with first selector and second selector, and the output of command unit is connected with the input of pole, pole one control mechanism, the input of pole, pole two control mechanism respectively;
The output of pole, described pole one control mechanism is connected with the input of described first selector, described first selector is provided with the first output and the second output, first output of first selector is connected with the first input end of pole one valve group controller, second output of first selector is connected with the first input end of station Ore-controlling Role, the first output of Ore-controlling Role of standing is connected with the feedback input end of pole, described pole one control mechanism, the feedback output end of pole, described pole one control mechanism is connected with the feedback input end of described pole one valve group controller, described pole one valve group controller comprises the low valve control of the high valve control in pole one and pole one, the high end valve group of the high valve control in described pole one and pole one is bi-directionally connected, the low end valve group of the low valve control in described pole one and pole one is bi-directionally connected,
The output of pole, described pole two control mechanism is connected with the input of described second selector, described second selector is provided with the first output and the second output, first output of second selector is connected with the input of pole two valve group controller, second output of second selector is connected with the second input of station Ore-controlling Role, the second output of Ore-controlling Role of standing is connected with the feedback input end of pole, described pole two control mechanism, the feedback output end of pole, described pole two control mechanism is connected with the feedback input end of described pole two valve group controller, described pole two valve group controller comprises the low valve control of the high valve control in pole two and pole two, the high end valve group of the high valve control in described pole two and pole two is bi-directionally connected, the low end valve group of the low valve control in described pole two and pole two is bi-directionally connected,
Described first selector is identical with described second selector, and described first selector and described second selector are all with the selector that the mode of connection control word of DC fields is Rule of judgment; When DC fields is in monopolar metallic return configuration mode, mode of connection control word is 0, first selector conducting first output, second selector conducting first output; When DC fields is in bipolar Ground return configuration mode, mode of connection control word is 1, first selector conducting second output, second selector conducting second output.
Mentioned order unit is set to man-machine interface, the solution that man-machine interface issues/locking order transmits extremely a pole control mechanism and pole, pole two control mechanism respectively by LAN net, carry out signal alternating transmission by control bus between pole one pole control mechanism and station control mechanism, between pole two pole control mechanism and station control mechanism, carry out signal alternating transmission by control bus.
Above-mentioned bipolar current is followed processing unit and is provided with bipolar released state R-S latch, to light a fire using pole one signal that obtains after pulsed logic or signal and pole two firing pulse logic OR signal carry out logical AND operation " S " signal as R-S latch, light a fire pulsed logic or signal of pole one is that the firing pulse enable signal of the high end valve group that arranges of pole one and low end valve group carries out logic OR and operate the signal obtained, and pole two firing pulse logic OR signal carries out logic OR to the high end valve group of pole two setting and the firing pulse enable signal of low end valve group to operate the signal obtained;
When will to work as bipolar released state signal be 0, represent that monopolar metallic return unlocks, when bipolar released state signal is 1, represent that bipolar Ground return unlocks.
Above-mentioned bipolar chaser structure comprises the pole one emergency outage signature computation unit of pole, pole one control mechanism setting, the pole two emergency outage signature computation unit of pole, pole two control mechanism setting;
Pole, this pole is controlled by pole one emergency outage signature computation unit, pole is protected, group is controlled, organize protection and outside trip signal carries out logic OR operation, obtains the emergency outage signal of pole one under bipolar released state respectively;
Pole, this pole is controlled by pole two emergency outage signature computation unit, pole is protected, group is controlled, organize protection and outside trip signal carries out logic OR operation, obtains the emergency outage signal of pole two under bipolar released state respectively;
Pole, pole one control mechanism, pole, pole two control mechanism are connected with station control mechanism respectively by control bus, the emergency outage feedback output end of control mechanism of standing is connected with the emergency outage feedback input end of pole, pole one control mechanism, pole, pole two control mechanism respectively, the output of pole, pole one control mechanism is connected with pole one valve group controller, and the output of pole, pole two control mechanism is connected with pole two valve group controller respectively;
Pole, pole one control mechanism, the emergency outage signal of this pole is sent to station control mechanism by pole, pole two control mechanism, to stand the emergency outage signal of control mechanism to received pole one, the emergency outage signal of pole two carries out logic OR operation and obtains or operate emergency outage signal, rectification side by or operation emergency outage signal feed back the transmission extremely emergency outage feedback input end of a pole control mechanism and the emergency outage feedback input end of pole, pole two control mechanism respectively by control bus, pole, pole one control mechanism, pole, pole two control mechanism is respectively by an emergency outage signal input extremely valve group controller, pole two valve group controller performs emergency outage action, inverter side feeds back the transmission extremely emergency outage feedback input end of a pole control mechanism and the emergency outage feedback input end of pole, pole two control mechanism with block signal respectively by control bus, pole, pole one control mechanism, pole, pole two control mechanism is respectively by a block signal input extremely valve group controller, pole two valve group controller performs emergency outage action.
The concrete employing of above-mentioned DC protection system is arranged as follows:
In rectification side station, ground network overcurrent protection 76SG 1 section is set to bipolar balance movement request unit, and its definite value is 0.01p.u.;
Rectification side is provided with ground network overcurrent protection 76SG 4 sections in station, and definite value is 0.3p.u., time delay 350ms;
In rectification side station, grounding system protection 87GSP 1 section of time delay is 2s;
Rectification side is provided with grounding system protection 87GSP 2 sections, definite value 0.3p.u., time delay 500ms in station;
Ground electrode circuit overload protection 76EL 2 sections of definite values of inverter side are 0.15p.u., time delay 750ms.
The Control protection treatment facility that the no ground pole of a kind of DC engineering of the present utility model mode is run, is coordinated by direct current station Ore-controlling Role, DC pole control system and DC protection system and carries out Control protection; Earthed switch chain condition in station is set to meet by force by described direct current station Ore-controlling Role, order mechanism to be carried out point earthed switch in described station, closes order and control; In the Ore-controlling Role of described direct current station, earth electrode connection status is judged separately by converting plant operating mode; Described DC pole control system is provided with bipolar synchronous solution/blocking mechanism, bipolar current tracking mechanism and bipolar chaser structure, and described DC protection system carries out ground protection.The utility model overcomes the deficiencies in the prior art, solves DC engineering and uses the interior ground network in station as the difficult problem keeping bipolar balance movement during earth electrode.Make the unblocking of the two poles of the earth, emergency outage completes in the short period of time, earth current and duration thereof can be reduced, the utility model scientific and effective, the demand of engineer applied can be met.
Accompanying drawing explanation
Fig. 1 is using the earth as the DC engineering schematic diagram of earth electrode in prior art;
Fig. 2 is the part-structure schematic diagram of the utility model DC engineering no ground pole mode operational system;
Fig. 3 is the structural representation of bipolar synchronous solution/blocking mechanism that the utility model DC engineering no ground pole mode is run;
Fig. 4 is the unblock logic diagram that extra-high voltage direct-current engineering of the prior art has earth electrode to run;
The bipolar current that Fig. 5 DC engineering no ground pole mode is run follows the logic diagram of process;
The structural representation of the bipolar chaser structure that Fig. 6 DC engineering no ground pole mode is run.
In Fig. 1, Fig. 6, comprising:
Order mechanism 100, pole, pole one control mechanism 200, pole, pole two control mechanism 300,
First selector 400, second selector 500, control mechanism 600 of standing,
Pole one valve group controller 700, pole two valve group controller 800.
Embodiment
With the following Examples the utility model is further described.
embodiment 1.
The Control protection treatment facility that DC engineering no ground pole mode is run is for no ground pole mode DC engineering as shown in Figure 2.Compare Fig. 1, the direct current system shown in Fig. 2 is due to not greatly as earth electrode, but employing is stood, interior ground network is as earth electrode, to effective operation, needs operationally to keep bipolar balance.
The Control protection treatment facility that the DC engineering no ground pole mode of this example is run, is coordinated by direct current station Ore-controlling Role, DC pole control system and DC protection system and carries out Control protection.Specifically be provided with as the alternating interface between man and computer of order mechanism, earthed switch chain condition in station is set to meet by force and judged separately by converting plant earth electrode connection status direct current station Ore-controlling Role, DC pole control system and carry out the DC protection system of ground protection.
Earthed switch chain condition in station is set to meet by force by direct current station Ore-controlling Role, order mechanism to be carried out point earthed switch in described station, closes order and control.Order mechanism can be human-computer interaction interface, carries out command set by human-computer interaction interface.Corresponding, the on off state SER event class of human-computer interaction interface is changed into " alarm " by " state ", just can make operations staff's Timeliness coverage when switch jump.
The Rule of judgment of earth electrode connection status is set to cancel the incidence relation with earthed switch point state in station in converting plant by direct current station Ore-controlling Role, judges that the conditional force of earthed switch point state in converting plant station meets in Inverter Station by being used for.The Rule of judgment of the earth electrode connection status of direct current station Ore-controlling Role, converting plant cancels the incidence relation dividing state with earthed switch in station, namely whether the interior earthed switch that need not judge to stand of satisfying condition of earth electrode connection status is in a point position, earth electrode still can be met in earthed switch is in co-bit in station be in connection status, " bipole arrangement state " that inverter side delivers to work station display uses the connection status judged station earth electrode, as long as the conditional force of point state of earthed switch in the station in decision logic is met.
DC pole control system is provided with bipolar synchronous solution/blocking mechanism, bipolar current tracking mechanism and bipolar chaser structure, bipolar synchronous solution/blocking mechanism adopts synchronous solution/locking processing mode to carry out separating/locking command execution process, bipolar current tracking mechanism employing bipolar current is followed processing mode and is carried out earth current control, and bipolar chaser structure adopts bipolar jumping process to carry out bipolar locking process.
DC protection system then carries out ground protection.
Concrete, bipolar synchronous solution/blocking mechanism, as shown in Figure 3, is provided with first selector 400 and second selector 500, and the output of order mechanism 100 is connected with the input of pole, pole one control mechanism 200, the input of pole, pole two control mechanism 300 respectively.
The output of pole, pole one control mechanism 200 is connected with the input of first selector 400, first selector 400 is provided with the first output and the second output, first output of first selector 400 is connected with the input of pole one valve group controller 700, second output of first selector 400 is connected with the first input end of station control mechanism 600, the first output of control mechanism 600 of standing is connected with the feedback input end of pole, pole one control mechanism, the feedback output end of pole, pole one control mechanism is connected with the feedback input end of pole one valve group controller, pole one valve group controller comprises the low valve control of the high valve control in pole one and pole one, the high end valve group of the high valve control in pole one and pole one is bi-directionally connected, the low end valve group of the low valve control in pole one and pole one is bi-directionally connected.
The output of pole, pole two control mechanism 300 is connected with the input of second selector 500, second selector 500 is provided with the first output and the second output, first output of second selector 500 is connected with the input of pole two valve group controller 800, second output of second selector 500 is connected with the second input of station control mechanism 600, the second output of control mechanism 600 of standing is connected with the feedback input end of pole, pole two control mechanism, the feedback output end of pole, pole two control mechanism is connected with the feedback input end of pole two valve group controller, pole two valve group controller comprises the low valve control of the high valve control in pole two and pole two, the high end valve group of the high valve control in pole two and pole two is bi-directionally connected, the low end valve group of the low valve control in pole two and pole two is bi-directionally connected.
First selector 400 is identical with second selector 500, all with the mode of connection control word of DC fields for Rule of judgment.When DC fields is in monopolar metallic return configuration mode, mode of connection control word is 0, first selector 400 conducting first output, second selector 500 conducting first output; When DC fields is in bipolar Ground return configuration mode, mode of connection control word is 1, first selector 400 conducting second output, second selector 500 conducting second output.
It should be noted that, as general knowledge known in this field, pole one refers to the pole of corresponding positive polarity in extra-high voltage direct-current engineering, and pole two refers to the pole of corresponding negative polarity in extra-high voltage direct-current engineering.High end valve group is the valve group that corresponding voltage is high, and low end valve group is the valve group that corresponding voltage is low.
This bipolar synchronous solution/blocking mechanism carries out bipolar synchronous solution/locking process specifically:
Order mechanism 100 issues solution/locking order to corresponding pole, pole one control mechanism 200, pole, pole two control mechanism 300, and first selector 400, second selector 500 select signal output channels according to mode of connection control word;
When mode of connection control word is 0, the solution that order mechanism 100 issues by first selector 400 conducting first output/locking order input extremely valve group controller 700, the solution that order mechanism 100 issues by second selector 500 conducting first output/locking order input extremely two valve group controllers 800, by pole one valve group controller 700, pole two valve group controller 800 is corresponding respectively performs solution/locking startup work, namely the high end valve group of pole one is controlled by the high valve control in pole one, the low end valve group corresponding execution solution/block action respectively of pole one is controlled by pole one low end valve group controller, the high end valve group of pole two is controlled by the high valve control in pole two, the low end valve group corresponding execution solution/block action respectively of pole two is controlled by pole two low end valve group controller,
When mode of connection control word is 1, second output of first selector conducting first selector, order mechanism 100 is issued to bipolar solution/locking order and inputs to station control mechanism 600 by the second output of second selector conducting second selector respectively, control mechanism 600 of standing carries out station control to received bipolar solution/locking order and operates to obtain the control signal that arrives at a station, synchronous for station control signal corresponding feedback is respectively beamed back pole, pole one control mechanism by the feedback output end of control mechanism 600 of standing, pole, pole two control mechanism, by pole, pole one control mechanism, feedback signal is issued pole one valve group controller by feedback input end again, by pole, pole two control mechanism, feedback signal is issued pole two valve group controller by feedback input end, by pole one valve group controller 700, pole two valve group controller 800 is corresponding respectively performs solution/block action, namely the high end valve group of pole one is controlled by the high valve control in pole one, the low end valve group corresponding execution solution/block action respectively of pole one is controlled by pole one low end valve group controller, the high end valve group of pole two is controlled by the high valve control in pole two, the low end valve group corresponding execution solution/block action respectively of pole two is controlled by pole two low end valve group controller.
Concrete, control mechanism 600 of standing carries out station control to received bipolar solution/locking order and operates to obtain the control signal that arrives at a station, and carries out especially by such as under type:
When receive unblock valve group signal from pole, pole one control mechanism 200 and unlock two valve group signals, receive unblock valve group signal from pole, pole two control mechanism 300 and unlock two valve group signals time, proceed as follows: by the unblock valve group signal received from pole, pole one control mechanism 200 with unlock two valve group signals and carry out logic OR operation and obtain pole one or processing signals; The unblock valve group signal received from pole, pole two control mechanism 300 or unblock two valve group signals are carried out logic OR operation and obtains pole two or processing signals; Described pole one or processing signals and described pole two or processing signals are carried out logical AND to operate and to control signal as standing and feed back respectively and beam back pole, pole one control mechanism 200 and pole, pole two control mechanism 300;
When receiving locking valve group signal or locking two valve group signals from pole, pole one control mechanism 200, when receiving locking valve group signal or locking two valve group signals from pole, pole two control mechanism 300, proceed as follows: the locking valve group signal received from pole, pole one control mechanism 200 and locking two valve group signals are carried out logic OR operation and obtain pole one or processing signals; The locking valve group signal received from pole, pole two control mechanism 300 and locking two valve group signals are carried out logic OR operation and obtain pole two or processing signals; Described pole one or processing signals and described pole two or processing signals are carried out logic OR to operate and to control signal as standing and feed back respectively and beam back pole, pole one control mechanism 200 and pole, pole two control mechanism 300.
Wherein, order unit is set to man-machine interface, the solution that man-machine interface issues/locking order transmits extremely a pole control mechanism 200 and pole, pole two control mechanism 300 respectively by LAN net, carry out signal alternating transmission by control bus between pole, pole one control mechanism 200 and station control mechanism 600, between pole, pole two control mechanism 300 and station control mechanism 600, carry out signal alternating transmission by control bus.
Bipolar current is followed processing mechanism and is provided with bipolar released state R-S latch.The high end valve group arrange pole one and the firing pulse enable signal of low end valve group carry out logic OR operation and obtain pole one and to light a fire pulsed logic or signal, the high end valve group arrange pole two and the firing pulse enable signal of low end valve group carry out logic OR operation and obtain pole two firing pulse logic OR signal, lighted a fire pole one again pulsed logic or signal and pole two firing pulse logic OR signal carries out logical AND operation, as " S " signal of R-S latch, when bipolar released state signal is 0, represent that monopolar metallic return unlocks, when bipolar released state signal is 1, represent that bipolar Ground return unlocks.
Bipolar current follows process especially by such as under type realization:
As shown in Figure 4, read the bipolar released state signal that R-S latch exports,
When bipolar released state signal is 0, be sent to valve group controller using the current-order calculated value of this pole as final current reference value;
When bipolar released state signal is 1, according to following concrete condition process:
1) calculated difference absolute value, specifically to pole received current reference value, does difference with the current-order calculated value of this pole, and difference is taken absolute value;
2) regulate dead band to compare absolute difference and current reference value, current reference value regulates the dead time to be 50A;
When absolute value is not more than adjustment dead band, be sent to valve group controller using the current-order calculated value of this pole as final current reference value;
When absolute value is greater than adjustment dead band, to pole received current reference value, compares with the current reference value of this pole and get little, using little current reference value as smaller value; When this pole is pole a period of time, be sent to valve group controller using above-mentioned smaller value as final current reference value; When this pole is pole two, and when generation current reference value is followed, deduct the result after 15A using above-mentioned smaller value and be sent to valve group controller as final current reference value.
Concrete, bipolar chaser structure comprises the pole one emergency outage signature computation unit of pole, pole one control mechanism setting, the pole two emergency outage signature computation unit of pole, pole two control mechanism setting.
Pole, this pole is controlled by pole one emergency outage signature computation unit, pole is protected, group is controlled, organize protection and outside trip signal carries out logic OR operation, obtains the emergency outage signal of pole one under bipolar released state respectively;
Pole, this pole is controlled by pole two emergency outage signature computation unit, pole is protected, group is controlled, organize protection and outside trip signal carries out logic OR operation, obtains the emergency outage signal of pole two under bipolar released state respectively;
Pole, pole one control mechanism, pole, pole two control mechanism are connected with station control mechanism respectively by control bus, the emergency outage feedback output end of control mechanism of standing is connected with the emergency outage feedback input end of pole, pole one control mechanism, pole, pole two control mechanism respectively, the output of pole, pole one control mechanism is connected with pole one valve group controller, and the output of pole, pole two control mechanism is connected with pole two valve group controller respectively.
As shown in Figure 5, bipolar jumping process is carried out specifically:
Pole, this pole is controlled by pole one emergency outage signature computation unit, pole is protected, group is controlled, organize protection and outside trip signal carries out logic OR operation, obtains the emergency outage signal of this pole under bipolar released state respectively;
Pole, this pole is controlled by pole two emergency outage signature computation unit, pole is protected, group is controlled, organize protection and outside trip signal carries out logic OR operation, obtains the emergency outage signal of this pole under bipolar released state respectively;
The emergency outage signal of this pole is sent to station control mechanism 600 by control bus by pole, pole one control mechanism 200, pole, pole two control mechanism 300 respectively;
Pole, pole one control mechanism, the emergency outage signal of this pole is sent to station control mechanism by pole, pole two control mechanism, to stand the emergency outage signal of control mechanism to received pole one, the emergency outage signal of pole two carries out logic OR operation and obtains or operate emergency outage signal, rectification side by or operation emergency outage signal feed back the transmission extremely emergency outage feedback input end of a pole control mechanism and the emergency outage feedback input end of pole, pole two control mechanism respectively by control bus, pole, pole one control mechanism, pole, pole two control mechanism is respectively by an emergency outage signal input extremely valve group controller, pole two valve group controller performs emergency outage action, inverter side feeds back the transmission extremely emergency outage feedback input end of a pole control mechanism and the emergency outage feedback input end of pole, pole two control mechanism with block signal respectively by control bus, pole, pole one control mechanism, pole, pole two control mechanism is respectively by a block signal input extremely valve group controller, pole two valve group controller performs emergency outage action.
DC protection system then carries out ground protection, specifically:
In rectification side station, ground network overcurrent protection 76SG 1 section is set to bipolar balance movement request, and its definite value is 0.01p.u., and fixed value adjusting principle flows into comparatively large unbalance electric current for a long time for getting ground network;
Rectification side increases ground network overcurrent protection 76SG 4 sections in station, definite value 0.3p.u., time delay 350ms, fixed value adjusting principle unlocks moment uneven direct current peak value for hiding, and delayed setting principle is the sequence operations such as bipolar jumping function action time and start and stop of the hiding issuable uneven time;
In rectification side optimization station, grounding system protection 87GSP 1 section of time delay is 2s, and delayed setting principle is that the electric current of ground network inflow 1pu in station more than 1s, can not get the differential of 1s;
Rectification side increases grounding system protection 87GSP 2 sections, definite value 0.3p.u., time delay 500ms in station, and fixed value adjusting principle unlocks moment uneven direct current peak value for hiding, and delayed setting principle is that 76SG IV section coordinates, and the time of getting 0.15s is differential;
Inverter side amendment ground electrode circuit overload protection 76EL 2 sections of definite values are 0.15p.u.; time delay 750ms; fixed value adjusting principle unlocks moment uneven direct current peak value for hiding, and delayed setting principle is coordinate with rectification side 87GSP 2 sections, and the time of getting 0.25s is differential.
The ground protection of DC protection system also comprises, and the unwanted protection mechanism of locking rectification side, prevents the stoppage in transit that its misoperation causes system unnecessary, as grounding electrode electric current unbalance protection mechanism and earth electrode overcurrent protection mechanism.
In addition, under the condition that the no ground pole of rectification side is run, by grounding electrode electric current IDEE1 and IDEE2 two Measurement channel fault-signal shieldings, the locking because Measurement channel fault causes is prevented.
The Control protection treatment facility that the no ground pole of a kind of DC engineering of the present utility model mode is run, is coordinated by direct current station Ore-controlling Role, DC pole control system and DC protection system and carries out Control protection.The utility model is by earthed switch chain condition in the station of optimization direct current station Ore-controlling Role; optimize " the earth electrode connection status " of direct current station Ore-controlling Role; optimize the bipolar synchronizing unlocking logic of DC pole control system; the bipolar current increasing DC pole control system follows process; increase the bipolar grounding system protection of jumping process and optimizing DC protection system of DC pole control system; overcome the deficiencies in the prior art, solve DC engineering and use the interior ground network in station as the difficult problem keeping bipolar balance movement during earth electrode.Make the unblocking of the two poles of the earth, emergency outage completes in the short period of time, earth current and duration thereof can be reduced, the utility model scientific and effective, the demand of engineer applied can be met.
In order to effectively realize effect of the present utility model, the earth current reference value of the current balance type control clamp mechanism of the station control mechanism 600 of DC engineering is revised as-0.0048p.u./-15A by 0p.u..The current balance type of control mechanism 600 of standing controls the adjustable range of clamp mechanism and is revised as 0.8% of rated current by 2% of rated current, follows function to coordinate bipolar current.Stand control mechanism 600 current balance type control clamp mechanism input variable by IdEE1+IdEE2+IdSG(grounding electrode electric current and station in earthed switch electric current sum) be revised as station in earthed switch electric current I dSG, bonding electrode current IdEE1+IdEE2 measuring amount.
Under bipolar the earth operational mode, by optimizing bipolar synchronous solution/blocking function, make operations staff after man-machine interface issues bipolar solution/locking order, shorten valve group and control the exectorial time difference, guarantee that the decreased duration of earth current higher value between solution/locking non-fully sync period is in the scope required.Follow function by increasing bipolar current and increase restriction overload function, when guaranteeing that the electric current of direct current operationally certain pole changes, the electric current of another pole can trace into identical current reference value fast, reduces earth current and duration thereof.When certain valve group of direct current or pole break down locking or emergency outage; in standing, ground network can flow through larger earth current, now by increasing bipolar jumping function, the remaining valve group of rapid emergency outage; control size and the duration of earth current, DC protection system carries out Control protection.By the acting in conjunction of said system, achieve bipolar balance movement, making to flow through the earth current size of ground network in station and duration can meet the needs that engineering safety runs.
The utility model needs for actual DC engineering operation, a kind of extra-high voltage direct-current engineering no ground pole control treatment equipment that mode is run is provided, overcome the deficiencies in the prior art, solve DC engineering and use the interior ground network in station as the difficult problem keeping bipolar balance movement during earth electrode.Make the unblocking of the two poles of the earth, emergency outage synchronously completes in the short period of time, earth current and duration thereof can be reduced, the utility model scientific and effective, the demand of engineer applied can be met.
The utility model is applied to power transmission Guangdong, waxy common wheat power station ± 800kV extra-high voltage direct-current transmission engineering, and practice finds, the utility model solves DC engineering and uses the interior ground network in station as the difficult problem keeping bipolar balance movement during earth electrode.Make the unblocking of the two poles of the earth, emergency outage completes in the short period of time, earth current and duration thereof can be reduced, the utility model scientific and effective, the demand of engineer applied can be met.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model but not restriction to the utility model protection range; although be explained in detail the utility model with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical solution of the utility model or equivalent replacement, and not depart from essence and the scope of technical solutions of the utility model.
Claims (6)
1. the Control protection treatment facility that runs of a DC engineering no ground pole mode; it is characterized in that: be provided with as the alternating interface between man and computer of order mechanism, earthed switch chain condition in station is set to meet by force and judge separately earth electrode connection status direct current station Ore-controlling Role, DC pole control system and carry out the DC protection system of ground protection
Described direct current station Ore-controlling Role is provided with station control mechanism, described DC pole control system is provided with pole, pole one control mechanism, pole, pole two control mechanism, pole one valve group controller, pole two valve group controller, is also provided with bipolar synchronous solution/blocking mechanism, bipolar current tracking mechanism and bipolar chaser structure.
2. the Control protection treatment facility that runs of DC engineering according to claim 1 no ground pole mode, is characterized in that:
Described bipolar synchronous solution/blocking mechanism is provided with first selector and second selector, and the output of command unit is connected with the input of pole, pole one control mechanism, the input of pole, pole two control mechanism respectively;
The output of pole, described pole one control mechanism is connected with the input of described first selector, described first selector is provided with the first output and the second output, first output of first selector is connected with the first input end of pole one valve group controller, second output of first selector is connected with the first input end of station Ore-controlling Role, the first output of Ore-controlling Role of standing is connected with the feedback input end of pole, described pole one control mechanism, the feedback output end of pole, described pole one control mechanism is connected with the feedback input end of described pole one valve group controller, described pole one valve group controller comprises the low valve control of the high valve control in pole one and pole one, the high end valve group of the high valve control in described pole one and pole one is bi-directionally connected, the low end valve group of the low valve control in described pole one and pole one is bi-directionally connected,
The output of pole, described pole two control mechanism is connected with the input of described second selector, described second selector is provided with the first output and the second output, first output of second selector is connected with the input of pole two valve group controller, second output of second selector is connected with the second input of station Ore-controlling Role, the second output of Ore-controlling Role of standing is connected with the feedback input end of pole, described pole two control mechanism, the feedback output end of pole, described pole two control mechanism is connected with the feedback input end of described pole two valve group controller, described pole two valve group controller comprises the low valve control of the high valve control in pole two and pole two, the high end valve group of the high valve control in described pole two and pole two is bi-directionally connected, the low end valve group of the low valve control in described pole two and pole two is bi-directionally connected,
Described first selector is identical with described second selector, and described first selector and described second selector are all with the selector that the mode of connection control word of DC fields is Rule of judgment; When DC fields is in monopolar metallic return configuration mode, mode of connection control word is 0, first selector conducting first output, second selector conducting first output; When DC fields is in bipolar Ground return configuration mode, mode of connection control word is 1, first selector conducting second output, second selector conducting second output.
3. the Control protection treatment facility that runs of DC engineering according to claim 2 no ground pole mode; it is characterized in that: described order unit is set to man-machine interface; the solution that man-machine interface issues/locking order transmits extremely a pole control mechanism and pole, pole two control mechanism respectively by LAN net; carry out signal alternating transmission by control bus between pole one pole control mechanism and station control mechanism, between pole two pole control mechanism and station control mechanism, carry out signal alternating transmission by control bus.
4. the Control protection treatment facility that runs of DC engineering according to claim 3 no ground pole mode, is characterized in that:
Described bipolar current is followed processing unit and is provided with bipolar released state R-S latch, to light a fire using pole one signal that obtains after pulsed logic or signal and pole two firing pulse logic OR signal carry out logical AND operation " S " signal as R-S latch, light a fire pulsed logic or signal of pole one is that the firing pulse enable signal of the high end valve group that arranges of pole one and low end valve group carries out logic OR and operate the signal obtained, and pole two firing pulse logic OR signal carries out logic OR to the high end valve group of pole two setting and the firing pulse enable signal of low end valve group to operate the signal obtained;
When will to work as bipolar released state signal be 0, represent that monopolar metallic return unlocks, when bipolar released state signal is 1, represent that bipolar Ground return unlocks.
5. the Control protection treatment facility that runs of DC engineering according to claim 4 no ground pole mode, is characterized in that:
Described bipolar chaser structure comprises the pole one emergency outage signature computation unit of pole, pole one control mechanism setting, the pole two emergency outage signature computation unit of pole, pole two control mechanism setting;
Pole, this pole is controlled by pole one emergency outage signature computation unit, pole is protected, group is controlled, organize protection and outside trip signal carries out logic OR operation, obtains the emergency outage signal of pole one under bipolar released state respectively;
Pole, this pole is controlled by pole two emergency outage signature computation unit, pole is protected, group is controlled, organize protection and outside trip signal carries out logic OR operation, obtains the emergency outage signal of pole two under bipolar released state respectively;
Pole, pole one control mechanism, pole, pole two control mechanism are connected with station control mechanism respectively by control bus, the emergency outage feedback output end of control mechanism of standing is connected with the emergency outage feedback input end of pole, pole one control mechanism, pole, pole two control mechanism respectively, the output of pole, pole one control mechanism is connected with pole one valve group controller, and the output of pole, pole two control mechanism is connected with pole two valve group controller respectively;
Pole, pole one control mechanism, the emergency outage signal of this pole is sent to station control mechanism by pole, pole two control mechanism, to stand the emergency outage signal of control mechanism to received pole one, the emergency outage signal of pole two carries out logic OR operation and obtains or operate emergency outage signal, rectification side by or operation emergency outage signal feed back the transmission extremely emergency outage feedback input end of a pole control mechanism and the emergency outage feedback input end of pole, pole two control mechanism respectively by control bus, pole, pole one control mechanism, pole, pole two control mechanism is respectively by an emergency outage signal input extremely valve group controller, pole two valve group controller performs emergency outage action, inverter side feeds back the transmission extremely emergency outage feedback input end of a pole control mechanism and the emergency outage feedback input end of pole, pole two control mechanism with block signal respectively by control bus, pole, pole one control mechanism, pole, pole two control mechanism is respectively by a block signal input extremely valve group controller, pole two valve group controller performs emergency outage action.
6. the Control protection treatment facility that runs of DC engineering according to claim 5 no ground pole mode, is characterized in that:
The concrete employing of described DC protection system is arranged as follows:
In rectification side station, ground network overcurrent protection 76SG 1 section is set to bipolar balance movement request unit, and its definite value is 0.01p.u.;
Rectification side is provided with ground network overcurrent protection 76SG 4 sections in station, and definite value is 0.3p.u., time delay 350ms;
In rectification side station, grounding system protection 87GSP 1 section of time delay is 2s;
Rectification side is provided with grounding system protection 87GSP 2 sections, definite value 0.3p.u., time delay 500ms in station;
Ground electrode circuit overload protection 76EL 2 sections of definite values of inverter side are 0.15p.u., time delay 750ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420579911.XU CN204068248U (en) | 2014-10-09 | 2014-10-09 | Control protection processing equipment for direct current engineering operation in grounding electrode-free mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420579911.XU CN204068248U (en) | 2014-10-09 | 2014-10-09 | Control protection processing equipment for direct current engineering operation in grounding electrode-free mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204068248U true CN204068248U (en) | 2014-12-31 |
Family
ID=52209695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420579911.XU Active CN204068248U (en) | 2014-10-09 | 2014-10-09 | Control protection processing equipment for direct current engineering operation in grounding electrode-free mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204068248U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849541A (en) * | 2015-05-14 | 2015-08-19 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for realizing voltage measurement abnormity detection in direct-current protection system |
-
2014
- 2014-10-09 CN CN201420579911.XU patent/CN204068248U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849541A (en) * | 2015-05-14 | 2015-08-19 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for realizing voltage measurement abnormity detection in direct-current protection system |
| CN104849541B (en) * | 2015-05-14 | 2018-02-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of method for realizing voltage measurement abnormality detection in DC protection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104242292A (en) | Control protection processing method for direct current engineering operation in grounding electrode-free mode | |
| CN105162172B (en) | A kind of grid-connected photovoltaic power generation station power automatic control system | |
| CN109861267A (en) | The electrically continuous commutation failure prediction of high-voltage dc transmission and idle emergency control method based on blow-out angle criterion | |
| CN104578187A (en) | Multi-terminal flexible direct-current power transmission system-level coordination control device | |
| CN103368203B (en) | Photovoltaic reverse power closed-loop control system and method | |
| WO2018098673A1 (en) | Bipolar vsc-hvdc and upfc hybrid topology structure and operating method therefor | |
| CN104600718B (en) | Reactive power control method and device of direct-current transmission layering connecting system | |
| CN103401259B (en) | Seamless switching control method for energy storage system | |
| CN104362665A (en) | Microgrid on-grid to off-grid switching control system and control method thereof | |
| CN105471085A (en) | Power frequency-variable frequency switching control method and apparatus and high voltage inverter | |
| CN106549408A (en) | A kind of multiterminal HVDC transmission system inverter puts into method online | |
| CN103715919B (en) | arc power supply system and control method thereof | |
| CN104022523A (en) | Voltage and current polarity control method for modulation electrode of high-voltage direct current tripolar power transmission system | |
| Mahfouz et al. | Autonomous operation of the DC fast-charging station | |
| CN204068248U (en) | Control protection processing equipment for direct current engineering operation in grounding electrode-free mode | |
| CN104300527B (en) | Control processing method for extra-high voltage direct current project operation in grounding electrode-free mode | |
| CN104714443A (en) | Polycrystalline silicon reduction power regulation power source and electrical control system thereof | |
| CN105449680A (en) | Automatic control method for monopole power in power distributed running mode | |
| CN204131124U (en) | Control equipment for operating in extra-high voltage direct current project in grounding electrode-free mode | |
| CN104362660A (en) | Double-pole operation method of high-voltage direct-current power transmission system in in-station grounding mode | |
| CN107785921B (en) | Urban power grid partition interconnection operation scheduling method based on flexible direct current transmission technology | |
| Zhang et al. | Research on distributed power flow controller and application | |
| CN105914766B (en) | It is a kind of based on control device and control method with light-preserved system electric power electric transformer | |
| CN205753609U (en) | A kind of work frequency conversion switching control and high voltage converter | |
| CN104283232A (en) | Unit direct-current side voltage balance control method for light direct-current power transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |