CN105322517A - Control method for automatically choosing effective signal - Google Patents
Control method for automatically choosing effective signal Download PDFInfo
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- CN105322517A CN105322517A CN201510539945.5A CN201510539945A CN105322517A CN 105322517 A CN105322517 A CN 105322517A CN 201510539945 A CN201510539945 A CN 201510539945A CN 105322517 A CN105322517 A CN 105322517A
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Abstract
The invention provides a control method for automatically choosing an effective signal. The method comprises the steps as follows: (A) the same signal is provided with a default signal source and a standby signal source as two signal source inputs; (B) each signal source is input from two sub-signals in parallel, and mutual checking is carried out; (C) the default signal source is selected as an effective signal; (D) whether two sub-signals of the default signal source are consistent or not is judged; (E) when the two sub-signals of the default signal source are consistent, the signal of the default signal source is output as a recognition result; when the two sub-signals of the default signal source are not consistent, the standby signal source is switched as the effective signal; (F) whether two sub-signals of the standby signal source are consistent or not is judged; and (G) when the two sub-signals of the standby signal source are consistent, the signal of the standby signal source is output as the recognition result; and when the two sub-signals of the standby signal source are not consistent, the standby signal source is warned and locked and a corresponding control strategy is locked. According to the method provided by the invention, the reliability and the accuracy of the signal of a safe automatic control device can be improved; and safe and stable operation of a power grid is ensured.
Description
Technical field
The present invention relates to power system security automatic control equipment, particularly relate to a kind of control method automatically selecting useful signal.
Background technology
Along with the development of electric power system, especially the continuing to bring out of great Qu AC/DC interconnected system, system operation mode is increasingly sophisticated, and the safety and stability problem of electrical network is more and more outstanding.In order to ensure the safe and stable operation of electrical network, need to configure safe auto-control device, each device is according to the voltage gathered, the information automatic discrimination element such as electric current and the position of the switch or the system failure, in order to can recognition system fault accurately, higher requirement be it is also proposed to the reliable accuracy requirement of signal source, especially in power grid security automatic control equipment field, for AC/DC parallel electrical network, if do not adopt certain stability contorting measure after direct current locking, may be catastrophic for electrical network, therefore the differentiation for the HVDC pole blocking of power grid security automatic control equipment must be accurately reliable, the direct-current emergency stoppage in transit signal synthesis that this criterion needs electric current and voltage and DC control and protection system in conjunction with change of current change to send differentiates, wherein the current major part of direct-current emergency stoppage in transit signal is hard-wired switching value information, signal source is relatively single, reliability is not very high.In the electricity net safety stable controlling system construction of current DC engineering, except employing hard-wired switches signal, also adopt optical fiber and digital passage, jointly gather coherent signal.As shown in Figure 1, pole control system is that two cover configures, and often overlapping pole control system provides the output of 1 cover hard contact and 1 unjacketed optical fiber signal to export: the direct current pole control hard contact point signal of A and direct current pole are controlled the hard contact point signal of B and connect rear formation hard contact point signal access stability control device; Direct current pole control A fiber-optic signal and direct current pole are controlled B fiber-optic signal and are connect rear formation fiber-optic signal access stability control device simultaneously.
The way at current scene be hard contact point signal as actuating signal, for reference only, its shortcoming is reliability and poor accuracy to fiber-optic signal.
Summary of the invention
For the shortcoming of prior art, the object of this invention is to provide a kind of useful signal automatic switching method.
To achieve these goals, the invention provides a kind of control method automatically selecting useful signal, it comprises the steps:
A, same signal have default signal source and the signal source input of two, space signal source;
B, each signal source are by two subsignals and connect input, and check mutually;
C, choose default signal source as useful signal;
D, judge that whether two subsignals in default signal source are consistent;
When two subsignals in E, default signal source are consistent, then export the signal in default signal source as differentiation result; When two subsignals in default signal source are inconsistent, then cut-in stand-by signal source is as useful signal;
F, judge that whether two subsignals in space signal source are consistent;
When two subsignals in G, space signal source are consistent, then export the signal in space signal source as differentiation result; When two subsignals in space signal source are also inconsistent, then alarm locking space signal source, and the corresponding control strategy of locking.
In the present invention, same signal has the input of two signal sources, specifies one of them signal source to be default signal source; Another signal source is space signal source, and each signal source carries out automatic Verification according to certain verification rule, when detecting that default signal source is invalid, automatically switches to space signal source; When two signal sources are all invalid, send corresponding alarm block signal, the corresponding control strategy of device locking, in case the misoperation that locking apparatus causes because of invalidating signal.
In step e, cut-in stand-by signal source, as useful signal, means the default signal source of locking simultaneously.
Method in the present invention can improve reliability and the accuracy of safe auto-control device signal, and ensures the safe and stable operation of electrical network.
According to another embodiment of the present invention, default signal source is hard contact point signal, and space signal source is fiber-optic signal.
According to another embodiment of the present invention, hard contact point signal comprises two subsignals: the hard contact point signal of pole control A, the hard contact point signal of pole control B.
According to another embodiment of the present invention, the effective method of discrimination of hard contact point signal is:
If the hard contact point signal state consistency of B is controlled in the pole control hard contact point signal of A and pole, then hard contact point signal is effective;
If it is inconsistent that B hard contact point signal state is controlled in the pole control hard contact point signal of A and pole, then hard contact point signal is invalid.
According to another embodiment of the present invention, fiber-optic signal comprises two subsignals: pole control A fiber-optic signal, pole control B fiber-optic signal.
According to another embodiment of the present invention, the effective method of discrimination of fiber-optic signal is:
If B fiber-optic signal state consistency is controlled in pole control A fiber-optic signal and described pole, then fiber-optic signal is effective;
If it is inconsistent that B fiber-optic signal state is controlled in pole control A fiber-optic signal and pole, then fiber-optic signal is invalid.
According to another embodiment of the present invention, control method comprises the steps:
A, same signal have default signal source and the signal source input of two, space signal source; Wherein default signal source is hard contact point signal, and space signal source is fiber-optic signal;
B, hard contact point signal are controlled the hard contact point signal of B and connect input by the hard contact point signal of pole control A, pole, and being checked mutually; Fiber-optic signal controls A fiber-optic signal by pole, pole is controlled B fiber-optic signal and connects input, and checks mutually;
C, choose hard contact point signal as useful signal;
D, judge that whether pole control A hard contact point signal, the pole hard contact point signal of control B be consistent;
When E, the hard contact point signal of pole control A, the pole hard contact point signal of control B are consistent, then export hard contact point signal as differentiation result; When the hard contact point signal of pole control A, the pole hard contact point signal of control B are inconsistent, then switches light optical fiber signaling is as useful signal;
F, judge that whether pole control A fiber-optic signal, pole control B fiber-optic signal be consistent;
When G, pole control A fiber-optic signal, pole control B fiber-optic signal are consistent, then output optical fibre signal is as differentiation result; When pole control A fiber-optic signal, pole control B fiber-optic signal are also inconsistent, then alarm Latching Fiber signal, and the corresponding control strategy of locking.
Compared with prior art, the present invention possesses following beneficial effect:
Method of the present invention can improve reliability and the accuracy of safe auto-control device signal, and ensures the safe and stable operation of electrical network.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is in prior art, the interface mode of pole control system and stabilized control system;
Fig. 2 is in embodiment 1, the logic diagram that useful signal automatically switches.
Embodiment
Embodiment 1
As shown in Figure 2, the present embodiment selects the control method of useful signal to comprise the steps: automatically
A, same signal have default signal source and the signal source input of two, space signal source; Wherein default signal source is hard contact point signal, and space signal source is fiber-optic signal;
B, hard contact point signal are controlled the hard contact point signal of B and connect input by the hard contact point signal of pole control A, pole, and being checked mutually; Fiber-optic signal controls A fiber-optic signal by pole, pole is controlled B fiber-optic signal and connects input, and checks mutually;
C, choose hard contact point signal as useful signal;
D, judge that whether pole control A hard contact point signal, the pole hard contact point signal of control B be consistent;
When E, the hard contact point signal of pole control A, the pole hard contact point signal of control B are consistent, then export hard contact point signal as differentiation result; When the hard contact point signal of pole control A, the pole hard contact point signal of control B are inconsistent, then switches light optical fiber signaling is as useful signal;
F, judge that whether pole control A fiber-optic signal, pole control B fiber-optic signal be consistent;
When G, pole control A fiber-optic signal, pole control B fiber-optic signal are consistent, then output optical fibre signal is as differentiation result; When pole control A fiber-optic signal, pole control B fiber-optic signal are also inconsistent, then alarm Latching Fiber signal, and the corresponding control strategy of locking.
Although the present invention discloses as above with preferred embodiment, and is not used to limit scope of the invention process.Any those of ordinary skill in the art, not departing from invention scope of the present invention, when doing a little improvement, namely every equal improvement done according to the present invention, should be scope of the present invention and contained.
Claims (7)
1. automatically select a control method for useful signal, it is characterized in that, described control method comprises the steps:
A, same signal have default signal source and the signal source input of two, space signal source;
B, each signal source are by two subsignals and connect input, and check mutually;
C, choose default signal source as useful signal;
D, judge that whether two subsignals in described default signal source are consistent;
When two subsignals in E, described default signal source are consistent, then export the signal in described default signal source as differentiation result; When two subsignals in described default signal source are inconsistent, then switch described space signal source as useful signal;
F, judge that whether two subsignals in described space signal source are consistent;
When two subsignals in G, described space signal source are consistent, then export the signal in described space signal source as differentiation result; When two subsignals in described space signal source are also inconsistent, then space signal source described in alarm locking, and the corresponding control strategy of locking.
2. control method according to claim 1, is characterized in that, described default signal source is hard contact point signal, and described space signal source is fiber-optic signal.
3. control method according to claim 2, is characterized in that, described hard contact point signal comprises two subsignals: the hard contact point signal of pole control A, the hard contact point signal of pole control B.
4. control method according to claim 3, is characterized in that, the effective method of discrimination of described hard contact point signal is:
If the hard contact point signal state consistency of B is controlled in the described pole control hard contact point signal of A and described pole, then described hard contact point signal is effective;
If it is inconsistent that B hard contact point signal state is controlled in the described pole control hard contact point signal of A and described pole, then described hard contact point signal is invalid.
5. control method according to claim 2, is characterized in that, described fiber-optic signal comprises two subsignals: pole control A fiber-optic signal, pole control B fiber-optic signal.
6. control method according to claim 5, is characterized in that, the effective method of discrimination of described fiber-optic signal is:
If B fiber-optic signal state consistency is controlled in described pole control A fiber-optic signal and described pole, then described fiber-optic signal is effective;
If it is inconsistent that B fiber-optic signal state is controlled in described pole control A fiber-optic signal and described pole, then described fiber-optic signal is invalid.
7. control method according to claim 1, is characterized in that, described control method comprises the steps:
A, same signal have default signal source and the signal source input of two, space signal source; Wherein said default signal source is hard contact point signal, and described space signal source is fiber-optic signal;
B, described hard contact point signal control the hard contact point signal of A by pole, pole is controlled the hard contact point signal of B and connects input, and check mutually; Described fiber-optic signal controls A fiber-optic signal by pole, pole is controlled B fiber-optic signal and connects input, and checks mutually;
C, choose described hard contact point signal as useful signal;
D, judge that whether described pole control A hard contact point signal, the described pole hard contact point signal of control B be consistent;
When E, the hard contact point signal of described pole control A, the described pole hard contact point signal of control B are consistent, then export described hard contact point signal as differentiation result; When the hard contact point signal of described pole control A, the described pole hard contact point signal of control B are inconsistent, then switch described fiber-optic signal as useful signal;
F, judge that whether described pole control A fiber-optic signal, described pole control B fiber-optic signal be consistent;
When G, described pole control A fiber-optic signal, described pole control B fiber-optic signal are consistent, then export described fiber-optic signal as differentiation result; When described pole control A fiber-optic signal, described pole control B fiber-optic signal are also inconsistent, then fiber-optic signal described in alarm locking, and the corresponding control strategy of locking.
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| CN201510539945.5A CN105322517A (en) | 2015-08-28 | 2015-08-28 | Control method for automatically choosing effective signal |
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| CN201510539945.5A CN105322517A (en) | 2015-08-28 | 2015-08-28 | Control method for automatically choosing effective signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110247379A (en) * | 2019-06-17 | 2019-09-17 | 国网宁夏电力有限公司检修公司 | It prevents the converter station pole double sets of control host from crashing and causes the system and method for steady control tripping |
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| CN103235217A (en) * | 2013-04-11 | 2013-08-07 | 国家电网公司 | Monitoring device and method for consistency of dual-protection actions |
| CN104682362A (en) * | 2015-03-06 | 2015-06-03 | 南方电网科学研究院有限责任公司 | Control method for automatically selecting effective signal |
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| US20120200161A1 (en) * | 2011-02-07 | 2012-08-09 | General Electric Company | System and method for providing redundant power to a device |
| CN103105613A (en) * | 2011-11-09 | 2013-05-15 | 中兴通讯股份有限公司 | Method and device for signal source selection |
| CN102497002A (en) * | 2011-11-23 | 2012-06-13 | 广东省电力设计研究院 | Fully-duplicated protective redundancy system for direct-current transmission project |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110247379A (en) * | 2019-06-17 | 2019-09-17 | 国网宁夏电力有限公司检修公司 | It prevents the converter station pole double sets of control host from crashing and causes the system and method for steady control tripping |
| CN110247379B (en) * | 2019-06-17 | 2021-07-06 | 国网宁夏电力有限公司检修公司 | System and method for preventing double-set halt of pole control host of converter station from causing stable control and refusing to move |
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Application publication date: 20160210 |
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