CN101713800B - Test method of digital substation relay protection device and special device thereof - Google Patents
Test method of digital substation relay protection device and special device thereof Download PDFInfo
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Abstract
The invention relates to a test method of a digital substation relay protection device. The test method is characterized in that the method comprises the following steps: (1) a digital relay protection tester generates groups of sampling messages to transmit to a CPU module; (2) when the number of sampling messages meets the sending demand, the CPU module sends the group of sampling messages to a plurality of network modules; (3) after all network modules receive the sampling messages, framing is performed according to the priority, VLAN ID and multicast address which are preset in the sampling messages, then data are sent to a network exchange module; (4) the network exchange module receives data and outputs from an output terminal, the output data are converted by an electronic-to-optical conversion chip and transmitted to single-interval or multi-interval relay protection device through optical fiber; and (5) the step (1)-(4) are repeated, thus realizing that the sampling messages are accessed to the single-interval or multi-interval relay protection device so as to complete the test. The invention has simple structure, is convenient to use and is applicable to the test of the single-interval or multi-interval relay protection device.
Description
Technical field
The invention belongs to field of electrical equipment, especially a kind of method of testing of digital substation relay protection device and isolated plant thereof.
Background technology
Digital transformer substation adopts two kinds of sampled value Packet Transfer Modes usually.A kind of is sampled value point-to-point transmission pattern, and a kind of is sampled value networking transmission mode.In first kind of ad hoc mode; The sampled value message of monospace equipment is directly inserted by merge cells (MU, Merging Unit), for multi-compartment equipment; Each interval sampling value message inserts data concentrator by merge cells, merges into behind the Frame access device again.Its advantage is concisely clear, simple synchronously for sampling message transmissions path, and it is convenient to realize, shortcoming is that sampled data can not be shared, and wiring is loaded down with trivial details, relates to proprietary protocol.In second kind of sampled value networking model, each interval sampling value message is by the direct access switch of MU, and monospace and multi-compartment equipment are accepted required sampling message on switch.Its advantage is to have realized that sampled data is shared, and wiring is simple, based on international standard protocol.Along with the progress of digital transformer substation network optimization design and simultaneous techniques, the sampled value networking model becomes main flow gradually, has obtained using widely.
Relay protection device is an of paramount importance equipment in the transformer station secondary system, and any change that relates to protection equipment all will be passed through function test and just can be incorporated into the power networks.The protective device that relates to multi-compartment for tranformer protection and bus differential protecting etc.; Two kinds of test methods are generally arranged; First kind be the traditional relay protection tester through electro-optic device, each phase electric weight is inserted merge cells, insert protective device by merge cells through switch again; Second kind is directly to generate the sampling message identical with the merge cells frame structure by the digital relay protection tester, inserts protective device through the wall switch.First kind of scheme needs a series of equipment cooperations to accomplish; In case transformer station formally puts into operation; Certain protective device maintenance just need also stop transport relevant merge cells and switch to get off to do experiment; This mode can influence the normal operation of transformer station, has influenced continuity, the continuation of power supply.In second kind of scheme, existing digital protecting tester can only be exported the accurate monospace sampling of road sign message, for the multi-compartment protection, needs the tester more than two to insert protective device through switch, has increased the cost expenditure, has caused unnecessary waste.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; Provide simple in structure, easy to use and both be fit to the test job of monospace relay protection device, can realize a kind of method of testing of digital substation relay protection device of the synchronism detection of multi-compartment relay protection device again.
This method of testing may further comprise the steps:
(1) the digital protective relay tester generates how group sampling messages are sent in the CPU module;
(2) when the satisfied transmission of the quantity of sampling message requires, the CPU module is sent to a plurality of mixed-media network modules mixed-medias with this batch sampling message;
(3) after each mixed-media network modules mixed-media all received the sampling message, according to the priority, VLAN ID and the multicast destination address framing that are provided with in advance in the sampling message, the data behind the framing sent to network exchange module;
(4) network exchange module is exported by output port after receiving data, and the data of output are sent to monospace or multi-compartment relay protection device through optical fiber after the conversion of electric light conversion chip;
(5) access of monospace or multi-compartment relay protection device sampling message had both been realized in repeating step (1)～(4), and then accomplished test.
And, when storing, stores the sampling message in the said step (1) according to the order of affiliated separation dot, and n the affiliated separation dot of sampling message is:
Wherein, N is a space-number.
And the quantity of the sampling message in the said step (2) is 1～N.
And the quantity of mixed-media network modules mixed-media is more than or equal to N in the said step (2).
Another object of the present invention provides a kind of isolated plant of using above-mentioned method of testing.
This isolated plant comprises the digital protective relay tester; The output terminal of digital protective relay tester connects the input end of a CPU module; The output terminal of CPU module connects the input end of at least one mixed-media network modules mixed-media; The output terminal of each mixed-media network modules mixed-media connects the input end of a network exchange module, and the output terminal of network exchange module connects the input end of an electrooptic conversion module, and the output terminal of electrooptic conversion module connects monospace or multi-compartment relay protection device.
And the quantity of said mixed-media network modules mixed-media is more than or equal to space-number.
And the quantity of the input end of said network exchange module equals the quantity of mixed-media network modules mixed-media.
Advantage of the present invention and good effect are:
1. the CPU module in this method is responsible for the sampling message of buffer memory digital protective relay tester output and is write in order in the buffer memory in the mixed-media network modules mixed-media; The value of the quantity of the sampling message that the CPU module receives can be from 1 to space-number to be tested; Whole process is accomplished automatically; Realized that a plurality of sampling messages are sent to the purpose of relay protection device in the different interval through subsequent module, solved the problem that a simple digital protective relay tester can only generate a sampling message.
2. the quantity of the mixed-media network modules mixed-media in this method is more than or equal to space-number to be tested; A plurality of sampling messages by the CPU module forwards are received and are sent in the network exchange module by mixed-media network modules mixed-media arranged side by side; Because the writing speed of CPU is very fast; The synchronous stand-by period between a plurality of mixed-media network modules mixed-medias will be far smaller than the sampling period, has guaranteed accuracy and real-time that the sampling message transmits.
3. the network exchange module in this method has the input port with the mixed-media network modules mixed-media equal number; Each input port is responsible for receiving the sampling message that the coupled mixed-media network modules mixed-media that connects transmits; Its inbound pacing is fast; Network exchange module has only an output port, and all sampling messages are exported by output port in order.What this network exchange module was used is 100,000,000 exchange chips, because it does not have complicated switching task, each message forward delay interval of sampling will be far smaller than the sampling period, has satisfied the message of the sampling on the same group delay requirement of relay protection device.
4. each chip in this method only is responsible for the directive sending of sampling message, all can cooperate well with various sampling message frame forms, no matter be international standard protocol or proprietary protocol, it is applied widely, it is convenient to be suitable for, saved investment.
5. the present invention is through combining digital protective relay tester, CPU module, mixed-media network modules mixed-media and network exchange module; Be the basis with sampled value networking transmission mode; Realized the synchronism detection of monospace relay protection device and multi-compartment relay protection device; Having avoided conventional test methodologies must shut down the defective of test, is that a kind of can to satisfy that tranformer protection " high, medium and low " or " high, medium and low, low " require, also can satisfy bus differential protecting largest interval number be the proving installation of the relay protection device of even number requirement.
Description of drawings
Fig. 1 is a work synoptic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is further specified, following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
A kind of method of testing of digital substation relay protection device may further comprise the steps:
1. the digital protective relay tester generates that many group sampling messages are sent in the CPU module (chip is Motorola MPC 8313) and writes buffer memory according to the order of affiliated separation dot.The definition of the affiliated separation dot of each sampling message is following:
N the affiliated separation dot of sampling message is:
Wherein, N is a space-number.
After pressing intact N the sampling message of separation dot sequential storage in the buffer memory of CPU module, the CPU module continues to receive sample message and according to the sequential storage of separation dot of N of next group.
2. when the quantity of sampling message in the CPU module buffer memory equaled space-number N, this N sampling message removed in the message queue of the N that has been sent out sampling message from CPU module buffer memory according in the sampling period buffer memory that is sent to mixed-media network modules mixed-media in batch.
Sampling period is: 20ms/ is the sampling number of ripple weekly.
3. mixed-media network modules mixed-media is made up of M Intel LXT 971 chips, is coordination between each chip.Consider to relate to maximum at interval required space-number N of defencive function experiment, M >=N should be arranged.In case be written into the sampling message in the buffer memory of chip, each chip promptly according to the priority that sets, VLAN ID and multicast destination address framing, sends to network exchange module with the data behind the framing simultaneously, and each chip empties buffer memory after sending and finishing immediately.Because host CPU module writing speed is very fast, the synchronous stand-by period of each chip will be far smaller than the sampling period.
4. network exchange module is exported by output port after receiving data, and the data of output are sent to monospace or multi-compartment relay protection device through optical fiber after the conversion of electric light conversion chip.
5. by sampling period repeating step (1)～(4), both realize the access of monospace or multi-compartment relay protection device sampling message, and then accomplished test.
Used specialized equipment in the said method; This equipment (dotted portion) as shown in fig. 1; Comprise the digital protective relay tester; The output terminal of this digital protective relay tester connects the input end of a CPU module, and the output terminal of CPU module connects the input end of at least one mixed-media network modules mixed-media, and the output terminal of each mixed-media network modules mixed-media connects the input end of a network exchange module; The output terminal of network exchange module connects the input end of an electrooptic conversion module, and the output terminal of electrooptic conversion module connects the sampled value input port of monospace or multi-compartment relay protection device.
The quantity of mixed-media network modules mixed-media is more than or equal to space-number.The quantity of the input end of network exchange module equals the quantity of mixed-media network modules mixed-media.The chip that the CPU module is used is Motorola MPC 8313.The chip that mixed-media network modules mixed-media uses is Intel LXT 971.The chip that network exchange module is used is Marvell 88E 6095.The chip that electrooptic conversion module uses is Avago HFBR 5961.
Application implementation example 1
Testing location: certain digital transformer substation
Need the SI number of access: 2
The multi-compartment relay protection device is: the iPACS-5941D tranformer protection
Device therefor: digital protective relay tester PWF-2, CPU module Motorola MPC 8313, mixed-media network modules mixed-media Intel LXT 971, network exchange module Marvell 88E 6095, electric light conversion chip Avago HFBR 5961.
The multicast address of high-pressure side interval sampling message is 01-0C-CD-01-00-22, and VLAN ID is 3, and priority is 6;
The multicast address of medium voltage side interval sampling message is 01-0C-CD-01-00-11, and VLAN ID is 3, and priority is 6;
The step of test process comprises:
1. electrooptic conversion module is connected optical fiber, the other end of this optical fiber connects tranformer protection sampling interface.
2. digital protective relay tester energising; The digital protective relay tester generates periodically, and 2 interval sampling messages are sent in the CPU module buffer memory; CPU according to the sampling period (ripple 100 points weekly, promptly the cycle is: the 20ms/100 point=0.2ms) control is sent, the phase is read in 2 sampling messages weekly; Interval, respectively corresponding high-pressure side and low-pressure side interval, the separation dot under each sampling message is following:
N sampling message corresponding intervals number is:
3.CPU will read 2 sampling messages write in interval number corresponding network chip, write after the completion removing in its message queue from CPU module buffer memory.
4. mixed-media network modules mixed-media is made up of 4 Intel LXT 971 chips, is coordination between each chip.Because this tests required SI number is 2, therefore have only the 1st and No. 2 network chip to launch.In the buffer memory of chip, be written into the sampling message; Each chip is promptly according to the priority that sets, VLAN ID and multicast destination address framing; Under the unified instruction of CPU, simultaneously the sampling message behind the framing is sent to network exchange module, each chip empties buffer memory after sending and finishing immediately.Because host CPU module writing speed is very fast, the synchronous stand-by period of each chip will be far smaller than the sampling period.
5. network exchange module receives 2 sampling messages that network chip sends; Be temporary in the buffer memory in proper order by arrival; By unique output port exchange output, the data of output are sent to iPACS-5941D tranformer protection equipment through optical fiber after the conversion of electric light conversion chip.
6. by sampling period repeating step (1)～(5), both realized that 2 required interval sampling messages of tranformer protection test inserted.
Through multiple authentication, the high-pressure side and the medium voltage side sampling message that are produced by the digital protective relay tester all are sent to tranformer protection equipment normally, and this sampling message is confirmed as the efficiently sampling data and realized test event by protective device.Hence one can see that, and the present invention's message output inserter of sampling can independently be realized the access of multi-compartment sampled data.
Application implementation example 2
Testing location: certain digital transformer substation
Need the SI number of access: 3
The multi-compartment relay protection device is: the CSC150E bus differential protecting
Device therefor: digital protective relay tester PWF-2, CPU module Motorola MPC 8313, mixed-media network modules mixed-media Intel LXT 971, network exchange module Marvell 88E 6095, electric light conversion chip Avago HFBR 5961
The multicast address of Line 1 road interval sampling message is 01-0C-CD-01-00-01, and VLAN ID is 2, and priority is 6;
The multicast address of No. 2 line segregation sampling messages is 01-0C-CD-01-00-02, and VLAN ID is 4, and priority is 6;
The multicast address of No. 3 line segregation sampling messages is 01-0C-CD-01-00-03, and VLAN ID is 9, and priority is 6;
The step of test process comprises:
1. electrooptic conversion module is connected optical fiber, the other end connection bus differential protection sampling interface of this optical fiber.
2. digital protective relay tester energising; The digital protective relay tester generates periodically, and 3 interval sampling messages are sent in the CPU module buffer memory; CPU according to the sampling period (ripple 96 points weekly, promptly the cycle is: the 20ms/96 point=0.208ms) control is sent, the phase is read in 3 sampling messages weekly; Respectively corresponding 3 line segregations, the separation dot under each sampling message is following:
N sampling message corresponding intervals number is:
3.CPU will read 3 sampling messages write in interval number corresponding network chip, write after the completion removing in its message queue from CPU module buffer memory.
4. mixed-media network modules mixed-media is made up of 4 Intel LXT 971 chips, is coordination between each chip.Because to test required SI number be 3 for this, therefore have only the 1st, No. 2 and No. 3 network chip launched.In the buffer memory of chip, be written into the sampling message; Each chip is promptly according to the priority that sets, VLAN ID and multicast destination address framing; Under the unified instruction of CPU, simultaneously the sampling message behind the framing is sent to network exchange module, each chip empties buffer memory after sending and finishing immediately.Because host CPU module writing speed is very fast, the synchronous stand-by period of each chip will be far smaller than the sampling period.
5. network exchange module receives 3 sampling messages that network chip sends; Be temporary in the buffer memory in proper order by arrival; By unique output port exchange output, the data of output are sent to CSC150E bus differential protecting equipment through optical fiber after the conversion of electric light conversion chip.
6. by sampling period repeating step (1)～(5), both realized that 3 required interval sampling messages of bus differential protecting test inserted.
Through multiple authentication, 3 line segregation sampling messages that produced by the digital protective relay tester all are sent to bus differential protecting equipment normally, and this sampling message is confirmed as the efficiently sampling data and realized test event by protective device.Hence one can see that, and the present invention's message output inserter of sampling can independently be realized the access of multi-compartment sampled data.
Claims (6)
1. the method for testing of a digital substation relay protection device, it is characterized in that: this method may further comprise the steps:
(1) the digital protective relay tester generates how group sampling messages are sent in the CPU module;
(2) when the satisfied transmission of the quantity of sampling message requires, the CPU module is sent to a plurality of mixed-media network modules mixed-medias with this batch sampling message;
(3) after each mixed-media network modules mixed-media all received the sampling message, according to the priority, VLAN ID and the multicast destination address framing that are provided with in advance in the sampling message, the data behind the framing sent to network exchange module;
(4) network exchange module is exported by output port after receiving data, and the data of output are sent to monospace or multi-compartment relay protection device through optical fiber after the conversion of electric light conversion chip;
(5) access of monospace or multi-compartment relay protection device sampling message has promptly been realized in repeating step (1)～(4), and then accomplishes test;
And, when storing, stores the sampling message in the said step (1) according to the order of affiliated separation dot, and n the affiliated separation dot of sampling message is:
Wherein, N is a space-number.
2. the method for testing of a kind of digital substation relay protection device according to claim 1, it is characterized in that: the quantity of the sampling message in the said step (2) is 1～N.
3. the method for testing of a kind of digital substation relay protection device according to claim 1 is characterized in that: the quantity of mixed-media network modules mixed-media is more than or equal to N in the said step (2).
4. the isolated plant of the method for testing of a kind of digital substation relay protection device as claimed in claim 1; Comprise the digital protective relay tester; It is characterized in that: the output terminal of this digital protective relay tester connects the input end of a CPU module; The output terminal of CPU module connects the input end of a plurality of mixed-media network modules mixed-medias; The output terminal of each mixed-media network modules mixed-media connects the input end of a network exchange module, and the output terminal of network exchange module connects the input end of an electric light conversion chip, and the output terminal of electric light conversion chip connects monospace or multi-compartment relay protection device.
5. the isolated plant of the method for testing of a kind of digital substation relay protection device according to claim 4, it is characterized in that: the quantity of said mixed-media network modules mixed-media is more than or equal to space-number.
6. the isolated plant of the method for testing of a kind of digital substation relay protection device according to claim 4, it is characterized in that: the quantity of the input end of said network exchange module equals the quantity of mixed-media network modules mixed-media.
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| CN102291277B (en) * | 2011-08-09 | 2013-06-19 | 上海思源弘瑞自动化有限公司 | Automatic test system and method for intelligent substation spacing apparatus |
| CN102636708A (en) * | 2012-03-27 | 2012-08-15 | 许继集团有限公司 | Intelligent substation process layer network simulating system and device simulator |
| CN102692576A (en) * | 2012-06-15 | 2012-09-26 | 黑龙江省电力有限公司检修公司 | Relay protection periodical inspection method |
| CN103267918B (en) * | 2013-06-09 | 2016-04-13 | 国家电网公司 | A kind of remote debugging system of site mount type protective relaying device and method |
| CN104142471B (en) * | 2013-09-05 | 2017-12-26 | 国家电网公司 | A kind of electronic equipment dry contact action delay measurement apparatus |
| CN103983878B (en) * | 2014-06-05 | 2016-09-14 | 贵州电力试验研究院 | Relay protection net synchronization capability based on Random Discrete time domain test system and method |
| CN111800313B (en) * | 2020-07-03 | 2021-11-09 | 国网四川省电力公司电力科学研究院 | Method for testing message output performance of digital relay protection tester |
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| CN201127028Y (en) * | 2007-12-19 | 2008-10-01 | 华东电网有限公司 | Time synchronization system transferring time through synchronous digital hierarchy optical communications network |
| CN101430355A (en) * | 2008-11-05 | 2009-05-13 | 江西省电力科学研究院 | Progressive search type digitized relay protection electromagnetic transient simulation test method |
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| CN201127028Y (en) * | 2007-12-19 | 2008-10-01 | 华东电网有限公司 | Time synchronization system transferring time through synchronous digital hierarchy optical communications network |
| CN101430355A (en) * | 2008-11-05 | 2009-05-13 | 江西省电力科学研究院 | Progressive search type digitized relay protection electromagnetic transient simulation test method |
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Effective date of registration: 20121127 Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Patentee after: Tianjin Electric Power Corp. Patentee after: State Grid Corporation of China Address before: 300010 Tianjin city Hebei District Wujing Road No. 39 Patentee before: Tianjin Electric Power Corp. |