CN103915838A - Out-of-step splitting method based on section information for power system - Google Patents
Out-of-step splitting method based on section information for power system Download PDFInfo
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- CN103915838A CN103915838A CN201410132837.1A CN201410132837A CN103915838A CN 103915838 A CN103915838 A CN 103915838A CN 201410132837 A CN201410132837 A CN 201410132837A CN 103915838 A CN103915838 A CN 103915838A
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Abstract
The invention discloses an out-of-step splitting method based on section information for a power system. The step-out disconnection device comprises a step-out judging relay, a communication module and a logic operation module, wherein the step-out judging relay and the communication module are connected with the logic operation module, the logic operation module is connected with an outlet relay, and the step-out disconnection method comprises the following steps: 1) the out-of-step judging relay judges the out-of-step state of the line by using the voltage and current information of the line, and transmits the out-of-step state as a local criterion of out-of-step disconnection to the logic operation module; 2) the communication module receives the judgment results of the out-of-step judgment relays of other stations on the same section, transmits the judgment results to the logic operation module, and obtains a remote criterion through the logic operation module; 3) the logic operation module operates the local criterion and the remote criterion to obtain the out-of-step disconnection action criterion, and the outlet relay determines whether to disconnect the line according to the action criterion. The invention avoids the possibility that the system is unstable but the step-out can not be correctly judged under the fault condition, and prevents the occurrence of large-area power failure accidents.
Description
Technical field
The present invention relates to a kind of Out-of-Step Splitting Systems method based on section information of electric power system, belong to the innovative technology of the Out-of-Step Splitting Systems method based on section information of electric power system.
Background technology
In extreme catastrophe failure situation, electric power system loses synchronously, as processed and will cause large area blackout not in time.Out-of-Step Splitting Systems device is as the important measures that guarantee power system safety and stability, it is the last line of defense of avoiding power system collapse, while specifically acting as Out-of-Step Splitting Systems device decision-making system step-out, be that two parts or excision sending end Power Plant are avoided fault spread by system splitting, maintain system stability.
Existing Out-of-Step Splitting Systems device is all differentiated circuit desynchronizing state based on our station electric parameters.Along with power system development, between regional power grid, contact is day by day tight greatly, and contact section is made up of multi circuit transmission lines conventionally, and in catastrophe failure situation, oscillation center is positioned on contact section, but has not significantly situation of oscillating characteristic on some circuit.Tradition Out-of-Step Splitting Systems device only utilizes the electric parameters of this device of access to judge step-out, if oscillating characteristic is obvious not on this circuit, there is the possibility that can not correctly identify step-out in tradition Out-of-Step Splitting Systems device, cause in system unstability situation the circuit can not off-the-line, fault spread, causes large area blackout.
Summary of the invention
The present invention is based on the oscillating characteristic of all the other circuits on same contact section, propose a kind of Out-of-Step Splitting Systems method based on section information of electric power system.The present invention utilizes distant place criterion (same section has the unstability on mutually synchronous/asynchronous characteristic line road and differentiates result) in conjunction with local criterion (result of this line status being differentiated based on our station voltage, current information), this circuit desynchronizing state to be differentiated, can effectively avoid system unstability but Out-of-Step Splitting Systems device can not be differentiated the situation of step-out, prevent the generation of large area blackout.
To achieve these goals, the technical solution used in the present invention is as follows:
The Out-of-Step Splitting Systems method based on section information of electric power system of the present invention, wherein the Out-of-Step Splitting Systems device based on section information of electric power system includes step-out differentiation relay, communication module and logical operation module, wherein step-out differentiation relay and the output of communication module and the input of logical operation module are connected, the output of logical operation module is connected with exit relay, and the Out-of-Step Splitting Systems method based on section information comprises the following steps:
(1) our station step-out differentiation relay utilizes our station voltage, current information to differentiate this circuit desynchronizing state, as the local criterion of Out-of-Step Splitting Systems, and is sent to logical operation module;
(2) communication module receives the differentiation result of the step-out differentiation relay of same all the other websites of section, and is sent to logical operation module, obtains distant place criterion after logical operation module computing;
(3) logical operation module is carried out computing to local criterion and distant place criterion, obtains the operating criterion of our station Out-of-Step Splitting Systems, and exit relay determines whether to separate column line according to operating criterion.
The Out-of-Step Splitting Systems method based on section information of electric power system of the present invention is to utilize distant place criterion in conjunction with local criterion, this circuit desynchronizing state to be differentiated.
Above-mentioned distant place criterion is the unstability differentiation result that same section has mutually synchronous/asynchronous characteristic line road.
Above-mentioned local criterion is the result of this line status being differentiated based on our station voltage, current information.
The present invention differentiates relay, communication module, logical operation module, exit relay by step-out and forms.Step-out is differentiated relay and is utilized our station electric parameters to differentiate access our station circuit asynchronous oscillation; Communication module receives all the other N of same section step-outs and differentiates the differentiation result of relay and be sent to logical operation module; Logical operation module is differentiated the differentiation result of relay and all the other N stepout-relaies and differentiates results and carry out computing and obtain the operating criterion of our station Out-of-Step Splitting Systems to our station step-out, exit relay determines according to operating criterion whether off-the-line accesses our station circuit.The present invention utilizes distant place criterion in conjunction with local criterion, this circuit desynchronizing state to be differentiated, and determines whether separate column line, is a kind of Out-of-Step Splitting Systems method based on section information of convenient and practical electric power system.
Accompanying drawing explanation
Fig. 1 is the structure chart based on section information Out-of-Step Splitting Systems device of electric power system of the present invention;
Fig. 2 is logical operation module structure chart;
Fig. 3 is electric network composition schematic diagram;
Fig. 4 is station 4 local criterion schematic diagrames;
Fig. 5 is station 4 distant place criterion schematic diagrames.
Embodiment
The Out-of-Step Splitting Systems method based on section information of electric power system of the present invention, wherein the Out-of-Step Splitting Systems device based on section information of electric power system includes step-out differentiation relay, communication module and logical operation module, wherein step-out differentiation relay and the output of communication module and the input of logical operation module are connected, the output of logical operation module is connected with exit relay, and the Out-of-Step Splitting Systems method based on section information comprises the following steps:
(1) our station step-out differentiation relay utilizes our station voltage, current information to differentiate this circuit desynchronizing state, as the local criterion of Out-of-Step Splitting Systems, and is sent to logical operation module;
(2) step-out that communication module receives same all the other websites of section is differentiated the differentiation result of relay, and is sent to logical operation module, after logical operation module computing, obtain distant place criterion (
in the N that a distant place sends over a step-out differentiation result, at least N-1 differentiation is step-out, and distant place criterion meets, otherwise distant place criterion does not meet);
(3) logical operation module is carried out computing to local criterion and distant place criterion (any one is judged to step-out distant place criterion and local criterion, our station Out-of-Step Splitting Systems operating criterion meets), obtain the operating criterion of our station Out-of-Step Splitting Systems, exit relay determines whether to separate column line according to operating criterion.
The Out-of-Step Splitting Systems method based on section information of electric power system of the present invention is to utilize distant place criterion in conjunction with local criterion, this circuit desynchronizing state to be differentiated.
Above-mentioned our station step-out is differentiated relay and based on our station electric parameters, this circuit asynchronous oscillation is differentiated; Communication module is differentiated result by all the other N of same section stepout-relaies and is reached our station; Our station our station step-out is differentiated to the differentiation result of relay to logical operation module and the differentiation result of all the other N our station step-out differentiation relays is carried out computing, obtains the operating criterion of our station Out-of-Step Splitting Systems; Exit relay determines whether to export solution column line according to operating criterion.
As an example of the actual electric network problem running in service example, embodiment is described.As shown in Figure 2, above-mentioned electric power system includes sending end electrical network and receiving end electrical network to electric network composition schematic diagram, and sending end electrical network includes station 2 and station 3, and receiving end electrical network includes station 1 and station 4, the 1～Out-of-Step Splitting Systems device of 4 configurations based on section information of standing of standing.Using the 4 Out-of-Step Splitting Systems devices of standing as research object to describing based on section information Out-of-Step Splitting Systems device.
The relative receiving-end system merit of (as DC bipolar block) sending angle unstability in sending end electrical network catastrophe failure situation, oscillation center is positioned on the contact section being made up of circuit 1～circuit 4.On circuit 1～circuit 3, step-out feature is obvious, and 1～3 stepout-relaies of standing of standing can determine step-out; Although circuit 4 is also positioned at oscillation center section, oscillation characteristics is obvious not, and 4 stepout-relaies of standing can not determine step-out.Do not meet for station 4 local step-out criterions; Because standing, 1～3 stepout-relaies of standing can determine step-out, 4 distant place step-out criterions of standing are satisfied, and (any two of 1～3 stepout-relaies of standing of standing are judged to step-out, 4 distant place criterions of standing meet), standing 4 meets based on section information Out-of-Step Splitting Systems device action criterion, the 4 Out-of-Step Splitting Systems devices outlet solution column line 4 of stand.
Fig. 4 is for the local criterion output signal of station 4 Out-of-Step Splitting Systems devices, and because local criterion does not meet, local criterion output is continuously 0; Fig. 5 is station 4 Out-of-Step Splitting Systems device distant place criterion output signals, and 174 cycle distant place criterions meet, and therefore 174 cycle distant place criterion signals are by 0 change 1.
Claims (4)
1. the Out-of-Step Splitting Systems method based on section information of an electric power system, wherein the Out-of-Step Splitting Systems device based on section information of electric power system includes step-out differentiation relay, communication module and logical operation module, wherein step-out differentiation relay and the output of communication module and the input of logical operation module are connected, the output of logical operation module is connected with exit relay, and the Out-of-Step Splitting Systems method based on section information comprises the following steps:
(1) our station step-out differentiation relay utilizes our station voltage, current information to differentiate this circuit desynchronizing state, as the local criterion of Out-of-Step Splitting Systems, and is sent to logical operation module;
(2) communication module receives the differentiation result of the step-out differentiation relay of same all the other websites of section, and is sent to logical operation module, obtains distant place criterion after logical operation module computing;
(3) logical operation module is carried out computing to local criterion and distant place criterion, obtains the operating criterion of our station Out-of-Step Splitting Systems, and exit relay determines whether to separate column line according to operating criterion.
2. the Out-of-Step Splitting Systems method based on section information of electric power system according to claim 1, is characterized in that utilizing distant place criterion in conjunction with local criterion, this circuit desynchronizing state to be differentiated.
3. the Out-of-Step Splitting Systems method based on section information of electric power system according to claim 2, is characterized in that above-mentioned distant place criterion is the unstability differentiation result that same section has mutually synchronous/asynchronous characteristic line road.
4. the Out-of-Step Splitting Systems method based on section information of electric power system according to claim 2, is characterized in that above-mentioned local criterion is the result of this line status being differentiated based on our station voltage, current information.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104300534A (en) * | 2014-10-14 | 2015-01-21 | 广州供电局有限公司 | Active splitting method and system for local power grid |
| CN104459460A (en) * | 2014-11-06 | 2015-03-25 | 中国南方电网有限责任公司 | Electric system out-of-step oscillation section capture method |
| CN105977929A (en) * | 2016-05-09 | 2016-09-28 | 南京南瑞继保电气有限公司 | Loss-of-synchronization protection system and method for power system |
| CN106099876A (en) * | 2016-07-14 | 2016-11-09 | 南京南瑞继保电气有限公司 | A kind of out-of-step protection method based on both sides electric parameters |
| CN108736493A (en) * | 2018-05-25 | 2018-11-02 | 南京国电南自电网自动化有限公司 | Construction method, control system and the control method on power system security island |
| CN110460042A (en) * | 2019-07-26 | 2019-11-15 | 中国南方电网有限责任公司 | Out-of-Step Splitting Systems control method, system and readable storage medium storing program for executing based on Wide-area Measurement Information |
| CN110492613A (en) * | 2019-08-23 | 2019-11-22 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of section Out-of-Step Splitting Systems differentiate control system and method |
| CN112383067A (en) * | 2020-11-11 | 2021-02-19 | 中国南方电网有限责任公司 | Control method and system for dealing with power system out-of-step disconnection and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104300534A (en) * | 2014-10-14 | 2015-01-21 | 广州供电局有限公司 | Active splitting method and system for local power grid |
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| CN106099876A (en) * | 2016-07-14 | 2016-11-09 | 南京南瑞继保电气有限公司 | A kind of out-of-step protection method based on both sides electric parameters |
| CN106099876B (en) * | 2016-07-14 | 2018-07-20 | 南京南瑞继保电气有限公司 | A kind of out-of-step protection method based on both sides electrical quantity |
| CN108736493A (en) * | 2018-05-25 | 2018-11-02 | 南京国电南自电网自动化有限公司 | Construction method, control system and the control method on power system security island |
| CN110460042A (en) * | 2019-07-26 | 2019-11-15 | 中国南方电网有限责任公司 | Out-of-Step Splitting Systems control method, system and readable storage medium storing program for executing based on Wide-area Measurement Information |
| CN110460042B (en) * | 2019-07-26 | 2022-11-29 | 中国南方电网有限责任公司 | Wide area information-based out-of-step separation control method and system and readable storage medium |
| CN110492613A (en) * | 2019-08-23 | 2019-11-22 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of section Out-of-Step Splitting Systems differentiate control system and method |
| CN112383067A (en) * | 2020-11-11 | 2021-02-19 | 中国南方电网有限责任公司 | Control method and system for dealing with power system out-of-step disconnection and storage medium |
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