CN103390882A - Oversea power grid protection constant value modification method - Google Patents
Oversea power grid protection constant value modification method Download PDFInfo
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- CN103390882A CN103390882A CN2013102854308A CN201310285430A CN103390882A CN 103390882 A CN103390882 A CN 103390882A CN 2013102854308 A CN2013102854308 A CN 2013102854308A CN 201310285430 A CN201310285430 A CN 201310285430A CN 103390882 A CN103390882 A CN 103390882A
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Abstract
The invention relates to an oversea power grid protection constant value modification method which includes: (1) performing in-advance constant value setting on protection devices under various topology structures of an oversea power grid system, and calculating the constant values corresponding to the various topology structures of the oversea power grid system to generate a constant value sheet; (2) storing the generated constant value sheet in a constant valve sheet table; (3) performing on-line recognition on on-off states of nodes of an oversea power grid network, and judging the topology structures of the current network according to the on-off states; (4) inputting the topology structures of the current network in the constant value sheet table, and finding the corresponding constant value sheet recording the current network topology structures in the constant value sheet table; (5) installing the constant valve sheet recording the current network structure in a protection device under a communication network to achieve modification on the constant values in the protection device; (6) enabling the protection device to perform protection according to the new constant value parameters. The oversea power grid protection constant value modification method can be widely used in the technical fields of power relay protection.
Description
Technical field
The present invention relates to a kind of electric relay protection technical field, particularly a kind of protection fixed value modification method of offshore power grid.
Background technology
Relay protection of power system is in the situation that electric power system is broken down or, in irregular operating, be used for excision fault fast, eliminates important automatic technology and the equipment (setting of dependence definite value is moved) of undesired situation.Relay protection of power system must possess following key property: fail safe, reliability, quick-action, selectivity and sensitivity.Wherein, correctly arranging of definite value has very important effect to the action of relaying protection and the safe operation of electrical network.At present, the definite value of protective relaying device and property indices are to obtain according to the maximum operational mode of system and minimum operational mode under off-line state, and remain unchanged system is in service.But the system in reality is in service; its operational mode is constantly to change; when system was in some special running status, in system, the definite value of part protection may not meet sensitivity and optionally requirement, then has the accident potential of protection mistake action and rejecting action.If can not in time find and be adjusted these technology hidden danger, may cause large-scale power outage.Therefore, when the operational mode of electrical network changed, in electrical network, the definite value of protective device also must be revised accordingly, like this guarantee power grid security, stable, operation reliably.
The fixed value adjusting system of traditional offshore power grid protective device separates with the fixed value modification system; fixed value modification manually carries out; fixed value adjusting is transferred to definite value administrative department by generation papery fixed value list and is examined; the fixed value list of being held after examining by the attendant after examining carries out manual modification to each marine platform; this fixed value modification mode needs the relaying protection attendant to expend considerable time and efforts; and relate to that link is many, the cycle is long, easily make mistakes; simultaneously easily cause the people to be the misoperation initiating failure, make protective device misoperation or tripping do.
The pattern that land electric network protection device generally adopts is also the pattern that its fixed value adjusting system separates with the fixed value modification system.Wherein, fixed value modification manually carries out.the way of the comparatively advanced electrical network of land minority is: adopt by the substation failure information system, main station failure information system and fixed value adjusting system form whole system, the course of work of whole system is: the main station failure information system will be collected from the failure information system of substation information, be delivered to fixed value adjusting system by the forward spacer assembly, the fixed value list file of adjusting out after fixed value adjusting system is used to these information, put the agreement file after audit, the main station failure information system has detected new file, can automatically enable the on-line tuning program, content in fixed value list is adjusted in protective device by the substation failure information system.But the method is applied on marine electric power networks has certain drawback.This is that this has increased cost to a certain extent because need to increase main station failure system and substation failure information system in whole system.In addition; after the each run mode has occurred to change; need through following process: the master information system is passed to fixed value adjusting system with substation information; the fixed value list that adjusting system is adjusted and made new advances; new fixed value list is after audit; under pass to main station failure system, substation failure system until protective device, so far new protection definite value is just had an effect.Therefrom can find out, fault message is collected in substation needs the time, and the new definite value of adjusting out will be through passing down the definite value of upgrading protective device after audit.This process can not all be completed automatically, in the middle of need artificially to examine link, for the consideration of safety, inartificial audit, automatic adjusting new fixed value list out, pass to protective device under not allowing automatically.Therefore, there is the problem that the each run mode can not fast automatic response after changing.
Summary of the invention
For the problems referred to above, the purpose of this invention is to provide a kind of offshore power grid protection fixed value modification method, the method has modification to the offshore power grid definite value, and to have a cost low, the characteristics that efficiency is high.
For achieving the above object, the present invention takes following technical scheme: a kind of offshore power grid protection fixed value modification method, it comprises the following steps: (1) carries out fixed value adjusting in advance to the protection equipment under the various topological structures of offshore power grid system, one-time calculation goes out the corresponding definite value of the various topological structures of offshore power grid system, and generates fixed value list; After gathering, the fixed value list that (2) will generate is stored in the fixed value list table; (3) ONLINE RECOGNITION is carried out in the on off state of each node of offshore power grid network, judge the topological structure of current network according on off state; (4) the current network topological structure that described step (3) is obtained inputs in the fixed value list table,, according to each network topology result and each fixed value list relation one to one, searches and records the corresponding fixed value list of current network topological structure in the fixed value list table; The fixed value list that records Exist Network Structure that (5) will obtain installs to protective device by under communication network, according to the modification of this fixed value list realization to definite value in protective device; (6) in described step (5), the definite value parameter of fixed value list comes into force in protective device, and protective device is protected action by new definite value parameter, and protective device enables.
In described step (3), the network topology structure that different on off states is corresponding different, form network topology structure between the equipment that is interconnected.
The present invention is owing to taking above technical scheme, and it has the following advantages: 1, the present invention takes full advantage of this limited condition of offshore power grid nodes, arranges out electrical network various network topologies connection in advance.Compare with the automatic modification system of some protective devices on land, the fits automatically on land is revised system and is just seemed too complicated, and cost is high, and efficiency is low.And this present invention takes full advantage of the working condition of protective device under the various topological connection of can ex ante analysis knowing offshore power grid, thereby has realized revising more efficient and simple method than land electrical network fits automatically.And the land electrical network is impossible ex ante analysis clear various topological connections, because the land electrical network can think that almost node is infinitely great, topology connects and is unlimited many, and is so just can't ex ante analysis clear, can only judge online the collection fault message.2, the present invention relies on existing ripe computer fixed value adjusting system, thereby generate, is connected corresponding fixed value list with different topology, is compared to some online fault subsystems, and the present invention is more simple and practical efficient.3, fixed value list of the present invention situation about at topological structure, changing, can realize automatically downloading definite value to protective device, greatly improved the automatization level of electrical network.4, definite value of the present invention is downloaded definite value to protective device automatically by computer control system, and needing operating personnel to remove device from system in the past, on-the-spot to revise definite value different.To a certain extent, save the manpower and materials cost, promoted operating efficiency.The present invention can extensively use in the electric relay protection technical field.
Description of drawings
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, the concrete steps of offshore power grid protection fixed value modification method are as follows:
1) the protection equipment under the various possibility of offshore power grid system topological structure is carried out fixed value adjusting in advance; thereby one-time calculation goes out the corresponding definite value of offshore power grid system various possibility topological structure; and generation fixed value list; wherein fixed value list records the one-to-one relationship of network topology structure and definite value; if total n of the definite value of the possible topological structure of fixed value adjusting generation in advance; generate fixed value list 1, fixed value list 2 ... fixed value list n is n fixed value list altogether.
After gathering, the fixed value list that 2) will generate is stored in the fixed value list table.
3) on off state of each node of offshore power grid network carried out ONLINE RECOGNITION, judge the topological structure of current network according on off state.The network topology structure that different on off states is corresponding different, form a network topology structure between the equipment that is interconnected, namely when the on off state between each equipment was closure, these equipment could form a network topology structure.For example: A, B, C, D, E, F equipment, if be connected between them, the topological network that it is corresponding is denoted as: NET-1-A-B-C-D-E-F; And for example be connected between A, B, C, D, but and E, F be not communicated with, E, F oneself are connected, the topological network that it is corresponding is denoted as: NET-2-A-B-C-D; NET-3-E-F; By that analogy, obtain all possible connection topology of offshore power grid and list numbering.
The topological structure of the current network that 4) step 3) is obtained inputs in the fixed value list table,, according to each network topology result and each fixed value list relation one to one, searches the fixed value list that records the current network topological structure in the fixed value list table.For example, when network topology structure changes, obtain recording the fixed value list of current network topological structure by tabling look-up in the fixed value list table.For example, fixed value list 1, fixed value list 2, fixed value list 3 ... fixed value list n, record respectively network topology structure NET-1-X-X-X-X, NET-2-X-X-X-X, NET-3-X-X-X-X ... the one-to-one relationship of NET-n-X-X-X-X and definite value.
The fixed value list that records Exist Network Structure that 5) will obtain installs to protective device by under communication network, completes the modification to definite value in protective device.
6) protective device enables, and allows new definite value parameter come into force in protective device, and protective device is protected action by new definite value parameter.
The various embodiments described above only are used for explanation the present invention, and wherein each step all can change to some extent, and every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (2)
1. an offshore power grid is protected the fixed value modification method, and it comprises the following steps:
(1) the protection equipment under the various topological structures of offshore power grid system is carried out fixed value adjusting in advance, one-time calculation goes out the corresponding definite value of the various topological structures of offshore power grid system, and generates fixed value list;
After gathering, the fixed value list that (2) will generate is stored in the fixed value list table;
(3) ONLINE RECOGNITION is carried out in the on off state of each node of offshore power grid network, judge the topological structure of current network according on off state;
(4) the current network topological structure that described step (3) is obtained inputs in the fixed value list table,, according to each network topology result and each fixed value list relation one to one, searches and records the corresponding fixed value list of current network topological structure in the fixed value list table;
The fixed value list that records Exist Network Structure that (5) will obtain installs to protective device by under communication network, according to the modification of this fixed value list realization to definite value in protective device;
(6) in described step (5), the definite value parameter of fixed value list comes into force in protective device, and protective device is protected action by new definite value parameter, and protective device enables.
2. a kind of offshore power grid as claimed in claim 1 is protected the fixed value modification method, it is characterized in that: in described step (3), the network topology structure that different on off states is corresponding different, form network topology structure between the equipment that is interconnected.
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Cited By (9)
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| CN106129972A (en) * | 2016-06-28 | 2016-11-16 | 南宁华供电力科技有限公司 | A kind of two-parameter electric relay protection technology |
| CN106356850A (en) * | 2016-11-04 | 2017-01-25 | 广东电网有限责任公司电力调度控制中心 | Safety and stability control device fault offline control strategy model generation method |
| CN106532660A (en) * | 2016-10-31 | 2017-03-22 | 云南电网有限责任公司 | Master station system with relay setting change, remote system and control method |
| CN106655077A (en) * | 2017-01-26 | 2017-05-10 | 南京陇源汇能电力科技有限公司 | Fixed value setting method of power distribution network in a power distribution system |
| CN107863748A (en) * | 2017-11-28 | 2018-03-30 | 国网福建省电力有限公司 | A kind of method based on the distant place modification of power distribution automation protection definite value |
| CN108803701A (en) * | 2018-06-25 | 2018-11-13 | 南京千智电气科技有限公司 | Definite value method of adjustment and security control device |
| CN110601158A (en) * | 2019-10-11 | 2019-12-20 | 国网福建省电力有限公司 | Method for online setting of distribution automation protection constant value |
| CN114123128A (en) * | 2021-11-19 | 2022-03-01 | 贵州电网有限责任公司 | Protection fixed value change generation method based on visual power grid expert system |
| CN114971938A (en) * | 2022-06-07 | 2022-08-30 | 上海山源电子科技股份有限公司 | Method and device for detecting override-proof network topology of coal mine power supply system and storage medium |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106129972A (en) * | 2016-06-28 | 2016-11-16 | 南宁华供电力科技有限公司 | A kind of two-parameter electric relay protection technology |
| CN106532660A (en) * | 2016-10-31 | 2017-03-22 | 云南电网有限责任公司 | Master station system with relay setting change, remote system and control method |
| CN106532660B (en) * | 2016-10-31 | 2018-09-04 | 云南电网有限责任公司 | A kind of main station system, remote system and the control method of relay fixed value modification |
| CN106356850B (en) * | 2016-11-04 | 2019-05-14 | 广东电网有限责任公司电力调度控制中心 | The generation method of safety and stability control device failure Off-line control Policy model |
| CN106356850A (en) * | 2016-11-04 | 2017-01-25 | 广东电网有限责任公司电力调度控制中心 | Safety and stability control device fault offline control strategy model generation method |
| CN106655077A (en) * | 2017-01-26 | 2017-05-10 | 南京陇源汇能电力科技有限公司 | Fixed value setting method of power distribution network in a power distribution system |
| CN106655077B (en) * | 2017-01-26 | 2019-03-29 | 南京陇源汇能电力科技有限公司 | A kind of fixed value adjusting method of power distribution network in distribution system |
| CN107863748A (en) * | 2017-11-28 | 2018-03-30 | 国网福建省电力有限公司 | A kind of method based on the distant place modification of power distribution automation protection definite value |
| CN108803701A (en) * | 2018-06-25 | 2018-11-13 | 南京千智电气科技有限公司 | Definite value method of adjustment and security control device |
| CN110601158A (en) * | 2019-10-11 | 2019-12-20 | 国网福建省电力有限公司 | Method for online setting of distribution automation protection constant value |
| CN114123128A (en) * | 2021-11-19 | 2022-03-01 | 贵州电网有限责任公司 | Protection fixed value change generation method based on visual power grid expert system |
| CN114123128B (en) * | 2021-11-19 | 2024-05-31 | 贵州电网有限责任公司 | Protection constant value change generation method based on visualized power grid expert system |
| CN114971938A (en) * | 2022-06-07 | 2022-08-30 | 上海山源电子科技股份有限公司 | Method and device for detecting override-proof network topology of coal mine power supply system and storage medium |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: Shenzhen Wellreach Automation Engineering Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation Co-patentee before: Shenzhen Wellreach Automation Engineering Co., Ltd. |