CN204131124U - Control equipment for operating in extra-high voltage direct current project in grounding electrode-free mode - Google Patents
Control equipment for operating in extra-high voltage direct current project in grounding electrode-free mode Download PDFInfo
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Abstract
A control device for operation in an extra-high voltage direct current engineering grounding-electrode-free mode is provided with a human-computer exchange interface, a pole-pole control mechanism, a station control mechanism, a pole-pole valve group controller, a bipolar synchronous de-blocking mechanism, a bipolar current following mechanism, a bipolar jump mechanism and an overload limiting mechanism, wherein the human-computer exchange interface is used as a command unit. The utility model overcomes prior art's is not enough, has solved the difficult problem that keeps bipolar balanced operation when direct current engineering uses the inslot grounding grid in the station as the earthing pole. Make unblock, the urgent outage of the two poles of the earth accomplish in short time, can reduce the earth current and duration, the utility model discloses the science is effective, can satisfy the demand that the engineering was used.
Description
Technical field
The utility model relates to DC engineering control system, particularly the control appliance that runs of a kind of extra-high voltage direct-current 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 appliance that extra-high voltage direct-current 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 extra-high voltage direct-current engineering no ground pole control appliance that mode is run, 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 demand of engineer applied can be met.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
A kind of extra-high voltage direct-current engineering no ground pole control appliance that mode is run is provided, be provided with alternating interface between man and computer, pole, pole one control mechanism, pole, pole two control mechanism, control mechanism of standing, pole one valve group controller, the pole two valve group controller as command unit, be also provided with bipolar synchronous solution/blocking mechanism, bipolar current tracking mechanism, bipolar chaser structure and overload limit mechanism.
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 control mechanism, the first output of control mechanism 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 control mechanism, the second output of control mechanism 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 connected with described pole one pole control mechanism and pole, pole two control mechanism respectively by LAN net, pole, described pole one control mechanism is connected by control bus with between the control mechanism of described station, is connected between pole, described pole two control mechanism with station control mechanism 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.
Above-mentioned restriction overload processing unit limits final current reference value under bipolar released state must not exceed maximum current, and maximum current is rated current 3125A.
The earth current reference value of the current balance type control subelement of the station control mechanism of above-mentioned DC engineering is set to-0.0048p.u./-15A, the current balance type of control mechanism of standing controls the adjustable range of subelement and is set to 0.8% of rated current, and the input variable of the current balance type control subelement of control mechanism of stand is set to the interior earthed switch electric current I dSG that stands.
The utility model needs for actual DC engineering operation, a kind of extra-high voltage direct-current engineering no ground pole control appliance that mode is run is provided, be provided with alternating interface between man and computer, pole, pole one control mechanism, pole, pole two control mechanism, control mechanism of standing, pole one valve group controller, the pole two valve group controller as command unit, be also provided with bipolar synchronous solution/blocking mechanism, bipolar current tracking mechanism, bipolar chaser structure and overload limit mechanism.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.
Accompanying drawing explanation
Fig. 1 is using the earth as the extra-high voltage direct-current engineering schematic diagram of earth electrode in prior art;
Fig. 2 is the structural representation of the control appliance that the utility model extra-high voltage direct-current engineering no ground pole mode is run;
Fig. 3 is the structural representation of bipolar synchronous solution/blocking mechanism that the utility model extra-high voltage direct-current 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 logic diagram of the bipolar current tracking mechanism that Fig. 5 extra-high voltage direct-current engineering no ground pole mode is run;
The structural representation of the bipolar chaser structure that Fig. 6 extra-high voltage direct-current engineering no ground pole mode is run.
In Fig. 1, Fig. 6, comprising:
Command unit 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 appliance that extra-high voltage direct-current engineering no ground pole mode is run is for no ground pole mode extra-high voltage direct-current engineering as shown in Figure 2.Compare Fig. 1, the extra-high voltage direct-current engineering 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 utility model is provided with bipolar synchronous solution/blocking mechanism, bipolar current tracking mechanism, bipolar chaser structure and overload limit mechanism.Bipolar synchronous solution/blocking mechanism carries out bipolar synchronous solution/locking process, bipolar current tracking mechanism carries out bipolar current and follows process, bipolar chaser structure carries out bipolar jumping process, overload limit mechanism carries out restriction overload process, make the unblocking of the two poles of the earth, emergency outage completes in the short period of time, to realize reducing earth current and duration thereof, bipolar balance in running can be realized.
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 command unit 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:
Command unit 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 command unit 100 issues by first selector 400 conducting first output/locking order input extremely valve group controller 700, the solution that command unit 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, command unit 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 operate to control as standing signal respectively corresponding feedback 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 input corresponding feedback 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 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 bipolar released state signal is 0, represents 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.
Preferably, restriction overload process specifically limits final current reference value and must not exceed maximum current under bipolar released state, and maximum current is rated current 3125A.
In order to effectively realize effect of the present utility model, the earth current reference value of the current balance type control subelement 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 subelement 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 subelement 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, controls size and the duration of earth current.By the acting in conjunction of above-mentioned 4 functions, 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 appliance 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 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 (7)
1. the control appliance that runs of extra-high voltage direct-current engineering no ground pole mode, is characterized in that:
Be provided with alternating interface between man and computer, pole, pole one control mechanism, pole, pole two control mechanism, control mechanism of standing, pole one valve group controller, the pole two valve group controller as command unit, be also provided with bipolar synchronous solution/blocking mechanism, bipolar current tracking mechanism, bipolar chaser structure and overload limit mechanism.
2. the control appliance that runs of the no ground pole of extra-high voltage direct-current engineering according to claim 1 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 control mechanism, the first output of control mechanism 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 control mechanism, the second output of control mechanism 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 appliance that runs of the no ground pole of extra-high voltage direct-current engineering according to claim 2 mode, it is characterized in that: described command unit is connected with described pole one pole control mechanism and pole, pole two control mechanism respectively by LAN net, pole, described pole one control mechanism is connected by control bus with between the control mechanism of described station, is connected between pole, described pole two control mechanism with station control mechanism by control bus.
4. the control appliance that the extra-high voltage direct-current engineering no ground pole mode according to claims 1 to 3 any one is run, 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 appliance that runs of the no ground pole of extra-high voltage direct-current engineering according to claim 1 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 appliance that runs of the no ground pole of extra-high voltage direct-current engineering according to claim 1 mode, it is characterized in that: described restriction overload processing unit limits final current reference value under bipolar released state must not exceed maximum current, and maximum current is rated current 3125A.
7. the control appliance that runs of the no ground pole of extra-high voltage direct-current engineering according to claim 1 mode, it is characterized in that: the earth current reference value of the current balance type control subelement of the station control mechanism of DC engineering is set to-0.0048p.u./-15A, the current balance type of control mechanism of standing controls the adjustable range of subelement and is set to 0.8% of rated current, and the input variable of the current balance type control subelement of control mechanism of stand is set to the interior earthed switch electric current I dSG that stands.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420578460.8U CN204131124U (en) | 2014-10-09 | 2014-10-09 | Control equipment for operating in extra-high voltage direct current project in grounding electrode-free mode |
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| CN201420578460.8U CN204131124U (en) | 2014-10-09 | 2014-10-09 | Control equipment for operating in extra-high voltage direct current project in grounding electrode-free mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004626A (en) * | 2018-07-11 | 2018-12-14 | 南京南瑞继保电气有限公司 | A kind of bi-pole area CT configuration method in DC transmission system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004626A (en) * | 2018-07-11 | 2018-12-14 | 南京南瑞继保电气有限公司 | A kind of bi-pole area CT configuration method in DC transmission system |
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