CN203522178U - Self-holding logic circuit for high-voltage direct-current connection mode signal of pole control system - Google Patents
Self-holding logic circuit for high-voltage direct-current connection mode signal of pole control system Download PDFInfo
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- CN203522178U CN203522178U CN201320633698.1U CN201320633698U CN203522178U CN 203522178 U CN203522178 U CN 203522178U CN 201320633698 U CN201320633698 U CN 201320633698U CN 203522178 U CN203522178 U CN 203522178U
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Abstract
The utility model discloses a self-holding logic circuit for a high-voltage direct-current connection mode signal of a pole control system including a pole I pole control system and a pole II pole control system. The self-holding logic circuit comprises an OR gate module and three selection module. A bipolar signal, a single-pole earth return wire e signal, and a single-pole metal return wire signal are respectively transmitted to three input terminals of the OR gate module and second input terminals of the three selection modules, wherein bipolar signal, the single-pole earth return wire e signal, and the single-pole metal return wire signal are generated by the pole I pole control system; and third input terminals of the three selection module are electrically connected to an output terminal of the OR gate module. A bipolar signal, a single-pole earth return wire e signal, and a single-pole metal return wire signal are respectively transmitted to output terminals of the three selection modules, wherein the bipolar signal, the single-pole earth return wire e signal, and the single-pole metal return wire signal are generated by the pole II pole control system; and the output terminals of the three selection modules are respectively and electrically connected with first input terminals of the three selection modules. According to the scheme, the self-holding logic circuit is added, so that stability of the direct-current power transmission system is improved.
Description
Technical field
The utility model relates to high voltage dc transmission technology field, is specifically related to a kind of utmost point control system high pressure direct current mode of connection signal self-sustaining logical circuit.
Background technology
HVDC (High Voltage Direct Current) transmission system has multiple operational mode, except bipolar operational mode, conventional monopolar ground circuit operation mode and monopolar metallic return mode in addition, the extra-high voltage direct-current mode of connection has 77 kinds of operation wiring modes more flexibly, when they can guarantee that a certain utmost point or valve group are stopped transport because of work such as maintenance, another utmost point or valve group still can normally be moved, thereby reduce the impact on whole system.But in high voltage DC engineering utmost point control system, the transmission of direct current mode of connection signal has problems at present; while moving as the utmost point 1 maintenance utmost point 2 monopolar metallic return modes; when the utmost point 1 neutral bus switch is protected to regular inspection transmission; to cause the utmost point 2 modes of connection not define; the parameters such as the operating utmost point two voltages and power occur abnormal; bring certain risk to direct current safe and stable operation, in reality, can not reach the flexible arrangement object of the direct current mode of connection.
Utility model content
In order to address the above problem, the utility model provides a kind of utmost point control system high pressure direct current mode of connection signal self-sustaining logical circuit, under the original mode of connection, increase self-sustaining logical circuit, after this self-sustaining logical circuit is processed, only have when another kind of mode of connection signal is transmitted in the control of direct current station to utmost point control, mode of connection signal in utmost point control is just understood displacement, otherwise keep original mode of connection signal, the impact of primary equipment state variation on operation utmost point when design is by the overhaul of the equipments of the elimination stoppage in transit utmost point like this, can make full use of high voltage direct current mode of connection advantage flexibly, stability and the availability factor of DC transmission system have been improved.
For realizing above object, the technical scheme that the utility model is taked is:
Utmost point control system high pressure direct current mode of connection signal self-sustaining logical circuit, described utmost point control system comprises the utmost point one utmost point control system, the utmost point two utmost point control systems, the described utmost point one utmost point control system, the utmost point two utmost point control systems all produce bipolar signal, monopolar ground return signal and monopolar metallic return signal, described self-sustaining logical circuit comprises or door module and selection module, described selection module comprises the first selection module, second selects module, the 3rd selects module, the monopolar ground return signal that the described utmost point one utmost point control system produces transfers to respectively or the first input end of door module and the second input of the first selection module, the bipolar signal that the described utmost point one utmost point control system produces transfers to respectively or the second input of door module and the second input of the second selection module, the monopolar metallic return signal that the described utmost point one utmost point control system produces transfers to respectively or the 3rd input of door module and the second input of the 3rd selection module, described first selects module, second selects module, the 3rd selects the 3rd input of module to be all electrically connected to or the output of door module, the monopolar ground return signal that the described utmost point two utmost point control systems produce, bipolar signal and monopolar metallic return signal transfer to respectively the first selection module, second selects module, the 3rd selects the output of module, and first selects module, second selects module, the 3rd output of selecting module respectively with the first selection module, second selects module, the 3rd selects the first input end of module to be electrically connected.
Output described or door module is output as at 1 o'clock, first selects module, second to select module, the 3rd to select the output signal that correspondence output first selects module, second to select module, the 3rd to select the second input of module to input respectively of module, output described or door module is output as at 0 o'clock, and first selects module, second to select module, the 3rd to select the corresponding output first of output difference of module to select module, second to select the signal of the first input end input of module, the 3rd selection module.
The utility model compared with prior art, its advantage having is: the utility model is by adding DC operation mode of connection signal self-sustaining logical circuit in utmost point control system, can make the direct current mode of connection signal of the current operation utmost point only have just displacement of mode of connection signal in utmost point control when another kind of mode of connection all devices state all meets, state variation will can not have influence on the mode of connection signal of the operation utmost point during overhaul of the equipments of the stoppage in transit utmost point like this, thereby guaranteed the stable operation of the operation utmost point, the high voltage direct current mode of connection flexibly advantage has obtained performance.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model utmost point control system high pressure direct current mode of connection signal self-sustaining logical circuit.
Wherein: 1, utmost point control system input module; 11, monopolar ground return signal; 12, bipolar signal; 13, monopolar metallic return signal; 2, utmost point control system input module; 21, monopolar ground return signal; 22, bipolar signal; 23, monopolar metallic return signal; 3 or door module; 4, select module; 5, select module; 6, select module.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present utility model is described in further details.
Embodiment
As shown in Figure 1, utmost point control system high pressure direct current mode of connection signal self-sustaining logical circuit, described utmost point control system comprises the utmost point one utmost point control system and the utmost point two utmost point control systems, wherein, utmost point control system input module 1 in the utmost point one utmost point control system produces respectively monopolar ground return signal 11, bipolar signal 12 and monopolar metallic return signal 13, and the utmost point control system input module 2 in the utmost point two utmost point control systems produces respectively monopolar ground return signal 21, bipolar signal 22 and monopolar metallic return signal 23.Self-sustaining logical circuit comprises and being provided with or door module 3 and select module, select module to comprise and select module 4, select module 5, select module 6, monopolar ground return signal 11 transfers to respectively or the input P1 of door module 3 and the input X2 of selection module 4, bipolar signal 12 transfers to respectively or the input P2 of door module 3 and the input X2 of selection module 5, monopolar metallic return signal 13 transfers to respectively or the input P3 of door module 3 and the input X2 of selection module 6, select module 4, select module 5, select the input I of module 6 to be all electrically connected to or the output Q of door module 3, monopolar ground return signal 21, bipolar signal 22 and monopolar metallic return signal 23 transfer to respectively selects module 4, select module 5, select the output Y of module 6, and select module 4, select module 5, the output Y that selects module 6 respectively with select module 4, select module 5, select the input X1 of module 6 to be electrically connected.
Or the output Q of door module is output as 1(and selects module 4, select module 5, select the input I of module 6 to be 1) time, select module 4, select module 5, select the corresponding output of output Y difference of module 6 to select module 4, select module 5, select the signal of the input X2 input of module 6 (to be respectively monopolar ground return signal 11, bipolar signal 12 and monopolar metallic return signal 13), output Q described or door module is output as 0(and selects module 4, select module 5, select the input I of module 6 to be 0) time, select module 4, select module 5, select the corresponding output of output Y difference of module 6 to select module 4, select module 5, select the signal of the input X1 input of module 6 (to be respectively monopolar ground return signal 21, bipolar signal 22 and monopolar metallic return signal 23).
The utmost point two utmost point control systems are before the direct current mode of connection signal of the application utmost point one utmost point control system, carrying out a self-holding circuit processes, the function realizing is: only in direct current mode of connection definition situation, when the direct current station control another kind of mode of connection signal of transmission (monopolar metallic return signal, monopolar ground return signal or bipolar signal) arrives the utmost point two utmost point control system, mode of connection signal in utmost point control system input module 2 is just understood displacement, otherwise keeps original mode of connection signal.
During with the 2 metallic return mode loop line operation of utmost point control system input module, closedly in the stoppage in transit utmost point (utmost point one utmost point control system) neutral bus switch (HSNBS) maintenance describe (monopolar ground return signal or bipolar signal are similar with it, repeat no more) here for example.(1) before the HSNBS closure of utmost point control system input module 1, monopolar metallic return signal 13 is 1, or the output Q output 1 of door module, select the input I input 1 of module 6, select the output Y of module 6 to select output to select the input X2 of module 6, the i.e. value 1 of monopolar metallic return signal 23.(2) the front monopolar metallic return signal 13 of the HSNBS closure of utmost point control system input module 1 is for becoming 0, and monopolar ground return signal 11 and bipolar signal 12 are still 0, or the output Q output 0 of door module, select the input I input 0 of module 6, select the output Y of module 6 to select output to select the input X1 of module 6, the i.e. value 1 of self-sustaining monopolar metallic return signal 23.So now the monopolar metallic return signal 23 of output is always 1, the state of stoppage in transit utmost point neutral bus switch does not affect the mode of connection of the operation utmost point, thereby solves the direct current mode of connection signal problem that directly transmission brings in utmost point control system.
The above embodiment has only expressed optimal design of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with claims.
Claims (2)
1. utmost point control system high pressure direct current mode of connection signal self-sustaining logical circuit, described utmost point control system comprises the utmost point one utmost point control system, the utmost point two utmost point control systems, the described utmost point one utmost point control system, the utmost point two utmost point control systems all produce bipolar signal, monopolar ground return signal and monopolar metallic return signal, it is characterized in that, described self-sustaining logical circuit comprises or door module and selection module, described selection module comprises the first selection module, second selects module, the 3rd selects module, the monopolar ground return signal that the described utmost point one utmost point control system produces transfers to respectively or the first input end of door module and the second input of the first selection module, the bipolar signal that the described utmost point one utmost point control system produces transfers to respectively or the second input of door module and the second input of the second selection module, the monopolar metallic return signal that the described utmost point one utmost point control system produces transfers to respectively or the 3rd input of door module and the second input of the 3rd selection module, described first selects module, second selects module, the 3rd selects the 3rd input of module to be all electrically connected to or the output of door module, the monopolar ground return signal that the described utmost point two utmost point control systems produce, bipolar signal and monopolar metallic return signal transfer to respectively the first selection module, second selects module, the 3rd selects the output of module, and first selects module, second selects module, the 3rd output of selecting module respectively with the first selection module, second selects module, the 3rd selects the first input end of module to be electrically connected.
2. utmost point control system high pressure direct current mode of connection signal self-sustaining logical circuit according to claim 1, it is characterized in that, output described or door module is output as at 1 o'clock, first selects module, second selects module, the 3rd selects the corresponding output first of output difference of module to select module, second selects module, the 3rd selects the signal of the second input input of module, output described or door module is output as at 0 o'clock, first selects module, second selects module, the 3rd selects the corresponding output first of output difference of module to select module, second selects module, the 3rd selects the signal of the first input end input of module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320633698.1U CN203522178U (en) | 2013-10-14 | 2013-10-14 | Self-holding logic circuit for high-voltage direct-current connection mode signal of pole control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320633698.1U CN203522178U (en) | 2013-10-14 | 2013-10-14 | Self-holding logic circuit for high-voltage direct-current connection mode signal of pole control system |
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| Publication Number | Publication Date |
|---|---|
| CN203522178U true CN203522178U (en) | 2014-04-02 |
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| CN201320633698.1U Expired - Fee Related CN203522178U (en) | 2013-10-14 | 2013-10-14 | Self-holding logic circuit for high-voltage direct-current connection mode signal of pole control system |
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| CN (1) | CN203522178U (en) |
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- 2013-10-14 CN CN201320633698.1U patent/CN203522178U/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20151014 |
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