CN104849534A - Method for realizing voltage measurement abnormity detection in direct-current station control system - Google Patents
Method for realizing voltage measurement abnormity detection in direct-current station control system Download PDFInfo
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Abstract
The invention provides a method for realizing voltage measurement abnormity detection in a direct-current station control system. The method comprises: local pole voltages and antipole voltages sent by two direct-current poles to a direct-current station control unit are respectively obtained; according to an amplitude of the measurement system in a normal range, a large threshold value and a small threshold value are set; when two valve group trigger pulses of the local pole of the direct-current pole are in enabling states, the large threshold value is selected; and otherwise, the small threshold value is selected; an absolute value of a difference value of two voltages of UdH and UdH_OP of the direct-current pole is calculated in the direct-current station control unit; if the absolute value of the difference value of the direct-current pole is larger than the local threshold value, a first criterion of the direct-current pole is generated; if any valve group trigger pulse in the direct-current pole unit is in an enabling state, a second criterion of the direct-current pole is generated; logic and operation are carried out on the first criterion and the second criterion to obtain a voltage measurement abnormity detection result in the direct-current pole unit. Therefore, the hidden danger of the voltage measurement abnormity can be found timely; a basis can be provided for decision making for the operator; and a direct-current latching event caused by the voltage measurement degree increase can be avoided.
Description
Technical field
The present invention relates to electric system high-voltage dc transmission electrical domain, particularly relate to a kind of method realizing voltage measurement abnormality detection at direct current station Ore-controlling Role.
Background technology
In some extra-high voltage direct-current transmission engineering, a pole is in series by two valve groups.Single valve group is carried out operation by valve set control system and is controlled, and valve unit protection system this valve group of can stopping transport after valve group breaks down situation avoids the expansion of fault coverage; Each pole is carried out operation by polar control system and is controlled, and the expansion of fault coverage is avoided in protection system this pole of can stopping transport after situation is broken down in pole in pole.Pole control, pole protection, valve group control and the normal operation of valve unit protection all depends on measuring system the critical quantity of pole, valve group is transferred to said system.But the judgement of current single-measurement channel DC voltage measurement exception only can depend on the observation of operations staff, and its efficiency is low, poor reliability.
For DC voltage UdH, for ensureing the reliability measured, need be transferred to respectively in the control of direct current pole, pole protection, the control of valve group and valve unit protection by multiple Measurement channel.
In order to control needs, the DC voltage of this pole mutually can be transmitted between pole 1 and pole 2 to pole, as this pole DC voltage UdH_OP_1 is sent to pole 2 by pole 1; This pole DC voltage UdH_OP_2 is sent to pole 1 by pole 2.
Direct current station Ore-controlling Role respectively with the mutual communication of pole control system of pole 1 and pole 2, but pole control is not sent to direct current station Ore-controlling Role by this pole and to the DC voltage of pole.Current DC voltage UdH measures the observation that abnormal judgement only can depend on operations staff, and its efficiency is low, poor reliability.
Summary of the invention
The object of the invention is to propose a kind of method realizing voltage measurement abnormality detection at direct current station Ore-controlling Role, to reflect the hidden danger of DC voltage measurement exception early, there is provided foundation for operations staff makes a policy, avoid voltage measurement degree to strengthen the direct current lockout state caused.
In order to solve the problems of the technologies described above, technical scheme of the present invention is as follows:
Realize a method for voltage measurement abnormality detection at direct current station Ore-controlling Role, comprise the following steps:
A, obtain pole 1 and be sent to pole 1 DC voltage UdH_1, the pole 2 DC voltage UdH_OP_2 of direct current station Ore-controlling Role, and pole 2 DC voltage UdH_2, the pole 1 DC voltage UdH_OP_1 of direct current station Ore-controlling Role are sent in pole 2, wherein pole 1 and pole 2 relative direct current pole each other, can be sent to pole by this pole DC voltage between pole 1 and pole 2;
B, pre-set two threshold values, if the amplitude of measuring system within the scope of nominal error is numerical value K, when two valve group trigger pulses of this pole, direct current pole all make in enabled state, select corresponding threshold value to be 2K, otherwise select threshold value to be K;
The absolute value of C, the absolute value asking for pole 1 DC voltage UdH_1 and pole 1 DC voltage UdH_OP_1 difference respectively, pole 2 DC voltage UdH_2 and pole 2 DC voltage UdH_OP_2 difference, if the absolute value of difference described in direct current pole is higher than the threshold value of this pole, then generate the first criterion to this direct current pole;
D, judge two valve group trigger pulse enabled state of this pole, direct current pole if any one valve group trigger pulse is enable, then to generate the Second Criterion to this direct current pole;
E, by direct current extremely in described first criterion, Second Criterion make logic and operation, draw DC voltage measurement abnormality detection result during this direct current is extremely.
The present invention is in conjunction with the pole control program of existing direct current station Ore-controlling Role and pole 1, pole 2, can in the control of existing pole with the Ore-controlling Role of direct current station, use the DC voltage UdH of vacant channel transfer pole 1 and pole 2 in the Ore-controlling Role of direct current station, then the judgement of the DC voltage measurement exception of pole 1 and pole 2 is realized respectively, for operating maintenance personnel decision-making provides foundation.
Compared with conventional art, the beneficial effect that the present invention brings has:
1, in high voltage direct current transmission project, if the UdH magnitude of voltage of a certain Measurement channel occurs extremely, automatically the judgement of electric voltage exception can be realized, and produce corresponding logout and failure wave-recording, electric voltage exception degree is understood, for operating maintenance person works decision-making provides foundation for operating maintenance personnel;
2, when valveless group trigger pulse is enable, blocking voltage abnormal detection function, has effectively ensured the reliability of measuring ability;
3, need not change increase hardware configuration, engineering availability is strong;
4, consider the operating mode that the extremely middle single valve group of direct current is run and bivalve group is run, and select different threshold values according to different operating conditions, make judged result more accurately, reliably.
Accompanying drawing explanation
Fig. 1 is the building-block of logic of the embodiment of the present invention;
Fig. 2 is that the electric voltage exception in Fig. 1 detects logical diagram.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Embodiment
As shown in Figure 1 and Figure 2, a kind of method realizing voltage measurement abnormality detection at direct current station Ore-controlling Role, comprises the following steps:
A, obtain pole 1 and be sent to pole 1 DC voltage UdH_1, the pole 2 DC voltage UdH_OP_2 of direct current station Ore-controlling Role, and pole 2 DC voltage UdH_2, the pole 1 DC voltage UdH_OP_1 of direct current station Ore-controlling Role are sent in pole 2, wherein pole 1 and pole 2 relative direct current pole each other, can be sent to pole by this pole DC voltage between pole 1 and pole 2;
B, pre-set two threshold values, if the amplitude of measuring system within the scope of nominal error is numerical value K, when two valve group trigger pulses of this pole, direct current pole all make in enabled state, select corresponding threshold value to be 2K, otherwise select threshold value to be K;
The absolute value of C, the absolute value asking for pole 1 DC voltage UdH_1 and pole 1 DC voltage UdH_OP_1 difference respectively, pole 2 DC voltage UdH_2 and pole 2 DC voltage UdH_OP_2 difference, if the absolute value of difference described in direct current pole is higher than the threshold value of this pole, then generate the first criterion to this direct current pole;
D, judge two valve group trigger pulse enabled state of this pole, direct current pole if any one valve group trigger pulse is enable, then to generate the Second Criterion to this direct current pole;
E, by direct current extremely in described first criterion, Second Criterion make logic and operation, draw DC voltage measurement abnormality detection result during this direct current is extremely.
When practical application, two valve groups of certain DC transmission engineering are respectively 400kV.For step B, when two valve group trigger pulses of this pole, direct current pole are all enable, threshold value 0.004 can be selected, otherwise select threshold value 0.002.
In the embodiment of the present invention, by the control of pole, pole 1, UdH_1 and UdH_OP_2 is transferred to direct current station Ore-controlling Role, UdH_2 and UdH_OP_1 is transferred to direct current station Ore-controlling Role by the control of pole, pole 2; When valveless group trigger pulse is enable, this detection method does not produce effect.When pole 1 has valve group trigger pulse enable, ask for the difference of UdH_1 and UdH_OP_1, and get the absolute value of difference; Simultaneously according to pole 1 single valve group or the whether enable different operating modes of bivalve group trigger pulse, select corresponding threshold value, be respectively 0.002 and 0.004; When absolute difference is greater than threshold value, then judge that pole 1 DC voltage UdH measures abnormal, produce corresponding logout and failure wave-recording; When absolute difference is less than or equal to threshold value, then do not produce any information.Accordingly, pole 2, when there being valve group trigger pulse enable, being asked for the difference of UdH_2 and UdH_OP_2, and is taken absolute value; Simultaneously according to the different operating modes that pole 2 single valve group or bivalve group are run, select corresponding threshold value, be respectively 0.002 and 0.004; When absolute difference is greater than threshold value, then judge that pole 2 DC voltage UdH measures abnormal, produce corresponding logout and failure wave-recording; When absolute difference is less than or equal to threshold value, then do not produce any information.
The present invention can realize the automatic detection of DC voltage measurement exception, for operating maintenance personnel decision-making provides foundation.Namely occur extremely at voltage measuring value in existing DC transmission engineering, automatically the criterion of electric voltage exception is realized by the logical program in the Ore-controlling Role of direct current station, and produce corresponding event and trigger fault record ripple to operating maintenance personnel, thus the abnormal hidden danger of Timeliness coverage voltage measurement, avoid voltage measurement degree to strengthen the direct current lockout state caused.
In the method, need be controlled by direct current pole except voltage measuring value used is sent to except the Ore-controlling Role of direct current station, quantity of state used is all in the program of direct current station Ore-controlling Role, without the need to changing hardware, software logic is except generation logout and trigger except record ripple, on original direct current station Ore-controlling Role function without impact, achieve DC voltage UdH and measure abnormal criterion, solve and can only depend on operations staff in the past and observe the problem that efficiency is low, reliability is low caused.
Above-listed detailed description is illustrating for one of the present invention possible embodiments, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of the claims of this case.
Claims (1)
1. realize a method for voltage measurement abnormality detection at direct current station Ore-controlling Role, it is characterized in that, comprise the following steps:
A, obtain pole 1 and be sent to pole 1 DC voltage UdH_1, the pole 2 DC voltage UdH_OP_2 of direct current station Ore-controlling Role, and pole 2 DC voltage UdH_2, the pole 1 DC voltage UdH_OP_1 of direct current station Ore-controlling Role are sent in pole 2, wherein pole 1 and pole 2 relative direct current pole each other, can be sent to pole by this pole DC voltage between pole 1 and pole 2;
B, pre-set two threshold values, if the amplitude of measuring system within the scope of nominal error is numerical value K, when two valve group trigger pulses of this pole, direct current pole all make in enabled state, select corresponding threshold value to be 2K, otherwise select threshold value to be K;
The absolute value of C, the absolute value asking for pole 1 DC voltage UdH_1 and pole 1 DC voltage UdH_OP_1 difference respectively, pole 2 DC voltage UdH_2 and pole 2 DC voltage UdH_OP_2 difference, if the absolute value of difference described in direct current pole is higher than the threshold value of this pole, then generate the first criterion to this direct current pole;
D, judge two valve group trigger pulse enabled state of this pole, direct current pole if any one valve group trigger pulse is enable, then to generate the Second Criterion to this direct current pole;
E, by direct current extremely in described first criterion, Second Criterion make logic and operation, draw DC voltage measurement abnormality detection result during this direct current is extremely.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223406A (en) * | 2015-11-05 | 2016-01-06 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of method realizing current measurement abnormality detection in DC protection system |
| CN106771500A (en) * | 2017-01-22 | 2017-05-31 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of HVDC transmission system difference channel current amount otherness detection method |
| CN107727963A (en) * | 2017-10-10 | 2018-02-23 | 中国南方电网有限责任公司超高压输电公司昆明局 | The DC electrical measurement fault distinguishing method verified based on historical data sample storehouse and algorithm |
| CN110456131A (en) * | 2019-07-25 | 2019-11-15 | 南方电网科学研究院有限责任公司 | A kind of DC voltage measurement exception localization method, device and equipment |
| WO2021063208A1 (en) * | 2019-09-30 | 2021-04-08 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for determining abnormal measurement of ultra-high voltage direct current rectifier side voltage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383506A (en) * | 2008-10-17 | 2009-03-11 | 南方电网技术研究中心 | Method for configuration protection of extra-high voltage DC power transmission system |
| CN102495363A (en) * | 2011-10-25 | 2012-06-13 | 南京南瑞继保电气有限公司 | Method for distinguishing shutting of +/-800 kV extra-high voltage direct-current valve group |
| CN103928910A (en) * | 2014-04-25 | 2014-07-16 | 国家电网公司 | Protection system of ultra-high-voltage direct-current transmission converter station |
| CN103956713A (en) * | 2014-04-01 | 2014-07-30 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Direct-current transmission line protection configuration setting method with electromagnetic coupling relationship taken into consideration |
-
2015
- 2015-05-14 CN CN201510243786.4A patent/CN104849534B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383506A (en) * | 2008-10-17 | 2009-03-11 | 南方电网技术研究中心 | Method for configuration protection of extra-high voltage DC power transmission system |
| CN102495363A (en) * | 2011-10-25 | 2012-06-13 | 南京南瑞继保电气有限公司 | Method for distinguishing shutting of +/-800 kV extra-high voltage direct-current valve group |
| CN103956713A (en) * | 2014-04-01 | 2014-07-30 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Direct-current transmission line protection configuration setting method with electromagnetic coupling relationship taken into consideration |
| CN103928910A (en) * | 2014-04-25 | 2014-07-16 | 国家电网公司 | Protection system of ultra-high-voltage direct-current transmission converter station |
Non-Patent Citations (2)
| Title |
|---|
| 厉瑜: "《青藏联网工程VCU***异常导致双极换相失败分析》", 《电网与清洁能源》 * |
| 王超: "《云广800kv直流输电工程直流测量***异常情况分析》", 《南方电网技术》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223406A (en) * | 2015-11-05 | 2016-01-06 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of method realizing current measurement abnormality detection in DC protection system |
| CN106771500A (en) * | 2017-01-22 | 2017-05-31 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of HVDC transmission system difference channel current amount otherness detection method |
| CN106771500B (en) * | 2017-01-22 | 2019-06-21 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of HVDC transmission system difference channel current amount otherness detection method |
| CN107727963A (en) * | 2017-10-10 | 2018-02-23 | 中国南方电网有限责任公司超高压输电公司昆明局 | The DC electrical measurement fault distinguishing method verified based on historical data sample storehouse and algorithm |
| CN107727963B (en) * | 2017-10-10 | 2019-08-09 | 中国南方电网有限责任公司超高压输电公司昆明局 | The electrical quantities measurement fault distinguishing method verified based on historical data sample and algorithm |
| CN110456131A (en) * | 2019-07-25 | 2019-11-15 | 南方电网科学研究院有限责任公司 | A kind of DC voltage measurement exception localization method, device and equipment |
| CN110456131B (en) * | 2019-07-25 | 2021-06-22 | 南方电网科学研究院有限责任公司 | Method, device and equipment for positioning direct-current voltage measurement abnormity |
| WO2021063208A1 (en) * | 2019-09-30 | 2021-04-08 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for determining abnormal measurement of ultra-high voltage direct current rectifier side voltage |
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