CN102208801A - Operation method for safely applying line protection device to wind power station - Google Patents
Operation method for safely applying line protection device to wind power station Download PDFInfo
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Abstract
The invention discloses an operation method for safely applying a line protection device to a wind power station, which relates to the relay protection of a power plant and is provided aiming at solving the problem that the line protection device in the current system cannot meet the protective requirements of the wind power station very well. The operation method comprises the following steps of: firstly, establishing a real-time simulation model which is a virtual power grid environment, including fault points in a wind power station, a bus and transmission lines, a main transformer unit of a power generator, a current and voltage mutual inductor, an equivalent system and a simulation system; secondly; establishing an experimental detection platform including a real-time digital simulation work station, an RTDS (Real Time Digital System) real-time digital simulator, an analogue quantity output board card, a power amplifier, a line protection device, an analogue circuit breaker, a switch conversion device and a digital quantity input board card; and thirdly, accessing the line protection device to be detected to the power amplifier of the detection system, then connecting the line protection device with the analogue circuit breaker and carrying out various kinds of experiments. The experiment implemented by using the wind power station model and an onsite oscillograph of the wind power station can provide a real and accurate simulation environment so that validation possibility is improved, and therefore the line protection device to be detected can be safely used for the wind power station after detected.
Description
Technical field
The present invention relates to the relaying protection field, particularly relate to line protective devices wherein.
Background technology
The international situation requirement of environmental protection, low-carbon (LC), impel wind power generation installed capacity rapid growth, account for electrical network total installation of generating capacity ratio and improve constantly, but, can bring serious negative effect power network safety operation owing to wind power-generating grid-connectedly have intermittence, a randomicity characteristics.Based on to the analysis of the extensive several times blower fan off-grid accident of somewhere electrical network with discover; the fault characteristic and the conventional power source of wind energy turbine set are not quite similar; make the existing systems protective device have the protection needs that not too adapt to wind energy turbine set; aspect in addition; through existing other technical equipment is inquired about, do not find to be used on the data introduction of wind energy turbine set as yet at line protective devices yet.So the invention reside in with making the best use of the situation the existing systems protective device improved on using method.
Summary of the invention
The object of the present invention is to provide a kind of way that existing line protective devices effectively is applied to wind energy turbine set; can realize that exert oneself size and the operational mode of wind energy turbine set are carried out randomness to be changed, thus the suitable net when examination line protective devices device is used for wind energy turbine set.
Suitable net way of the present invention comprises following content:
1) at first to set up a simulation model.Described simulation model promptly is to set up a virtual power grid environment on the software systems RSCAD of RTDS; it include wind energy turbine set, bus and transmission line, generator transformer group, current transformer, voltage transformer, etc. each fault point in valve system and the analogue system, be used for line protective devices are carried out real-time simulation test and monitoring.
In the above-mentioned virtual power grid environment, bus is at least four, transmission line is at least three, wind energy turbine set is connected with Infinite bus system by single transmission back line LN, the synchronous generator transformer group is connected with Infinite bus system by two transmission back line MN1, MN2, each fault point that is equipped with in the test is arranged in the diverse location place and main transformer high-pressure side and 220kV bus on each transmission line, be provided with eight Test to Failure points in this simulated environment altogether, the size of regulating fault type, trouble duration and transition resistance by operation test.
2) secondly be to set up the test detection platform.This platform includes real-timedigital simulation work station (8), RTDS Real Time Digital Simulator (1), analog quantity output integrated circuit board (2), power amplifier (3), line protective devices (4), mimic-disconnecting switch (5), switch transition device (6) and digital quantity input integrated circuit board (7).During test; line protective devices to be measured (X) are linked into line protective devices (4) standby position of the simulation experiment system of simulation work station; after placing power amplifier; be connected with mimic-disconnecting switch; this mimic-disconnecting switch is connected with the RTDS simulator again with digital quantity input integrated circuit board by the switching value conversion equipment; so closed loop makes the RTDS Real Time Digital Simulator can send the secondary voltage and the secondary current of tested line protector both sides, reception be each position contact point signal of circuit breaker.Concrete operational mode is, real-time simulator is by analog quantity output integrated circuit board output analog quantity, voltage through power amplifier output, the analog acquisition passage of magnitude of current line attachment protective device, the branch that line protective devices (4) send, reclosing command is received the branch of mimic-disconnecting switch (5), closing circuit, the position contact of mimic-disconnecting switch (5) is connected with digital quantity input integrated circuit board (7) by switching value conversion equipment (6), finally feed back to Real Time Digital Simulator, in process of the test, change fault type and make line protective devices (4) action, make it to send branch, reclosing command direct action is in the branch of mimic-disconnecting switch (5), closing circuit; Branch, the closing position contact of mimic-disconnecting switch (5) feed back to RTDS, final disengagement failure electric current.
3) carry out all kinds of closed tests by the above-mentioned real-time simulation work station of setting up, line protective devices wherein (X) are UUT.The pilot project that can carry out according to test requirements document comprises: the district under wind energy turbine set main transformer high-pressure side difference ground connection and the earth-free situation; inside and outside instantaneity metallicity fault and permanent metallicity fault; transient state surmounts test and test operate time of 70% place; developing fault and through the transition Resistance Fault; break down again in system oscillation and the vibration; system frequency excursion; the charging of circuit idle-loaded switching-on; separate cyclization and hand crossed belt faulty line; TV; the TA broken string; the TA saturation testing; DC power supply intermittently reaches DC power supply fluctuation check and recurrence of failure; in process of the test, regulate the power and the operational mode of wind energy turbine set; simultaneously; fault characteristic when haveing the wind energy turbine set fault according to test result analysis; thereby confirm the adaptability when line protective devices are used for wind energy turbine set; and promoting that manufacturer is corrected on principle, the scalable line protective devices make it to reach the effect of effective protection wind-electricity integration thus.
Advantage of the present invention and good effect are:
At first be to guarantee that stand-by line protective devices can be used for wind energy turbine set by effective and safe;
By the RTDS wind energy turbine set simulation model of having set up, to its fault new features research, provide similar l-G simulation test place in the time of can be to extensive voltage levels wind energy turbine set connecting system;
By the application to this method, the line protective devices that can be main protection with vertical connection distance clearly are not suitable for the technological standpoint of wind-powered electricity generation circuit, can clear and definite irrational wind-powered electricity generation protection configuration have significant impact to system protection simultaneously;
The achievement in research that this project provides from the angle of electrical network, cooperates with the reasonable of system protection by the wind-powered electricity generation unit, makes the wind-powered electricity generation unit support electrical network when being necessary, avoids the extension of fault; For the wind-powered electricity generation investor, can avoid when power network fluctuation because extensive operation blower fan off-grid increases its effective generating dutation.
Description of drawings
Fig. 1 is real-time simulation operational system structural representation in the way of the present invention
Fig. 2 is the simulation power grid environment signal in the way of the present invention.
Symbol among the figure: DLi is a circuit breaker, and TVi is a voltage transformer, and TAi is a current transformer, and Ki is the fault point, and L, M, N are bus.
Embodiment
A kind of line protective devices being used safely in the way of wind energy turbine set, being made of three parts substantially, at first is to set up a Real-Time Model, and this model has the power grid environment that comprises wind-driven generator of real-time simulation; On this basis, second step was set up the pilot system detection platform, and this platform includes real-timedigital simulation work station, RTDS Real Time Digital Simulator, analog quantity output integrated circuit board, power amplifier, line protective devices, mimic-disconnecting switch, switch transition device and digital quantity input integrated circuit board; The 3rd, on above-mentioned simulation work station operation basis, test detection according to test requirements document.
Here; described real-time simulation work station is a computer management system; contain virtual power grid environment and real-time simulation moving model, virtual power grid environment wherein includes wind energy turbine set as shown in Figure 2; bus L, M, N and transmission line MN1, MN2, LN; the main transformer group, current transformer TA1, TA2, voltage transformer TV1, TV2; and each point failure Ki in the analogue system and wait valve system, be used for line protective devices are carried out the real-time simulation test and monitor.Its concrete connected mode is: wind energy turbine set is by circuit breaker DL1, DL2 is connected with circuit LN, the other side of circuit LN is passed through circuit breaker DL3 and is connected with waiting valve system, the synchronous generator transformer group is passed through DL4, DL5, transmission line MN1, DL6 is connected with waiting valve system, transmission line MN2 is in parallel with MN1, the circuit breaker of both sides is respectively DL7, DL8, voltage transformer TV1 is installed on wind field 220kV bus, voltage transformer TV2 is installed on equivalent system side bus, current transformer TA1 is installed on the wind energy turbine set side of circuit LN, current transformer TA2 is installed on the system side of circuit LN, short circuit test point K1 is connected on the wind energy turbine set side 220kV bus, short circuit test point K2 is connected to the wind energy turbine set side of circuit LN, short circuit test point K3 is connected in the middle of the circuit LN, short circuit test point K4 is connected to the system side of circuit LN, short circuit test point K5 is connected on the equivalent system side bus, K6, K7, K8 is connected in the diverse location of circuit MN1.
Operation test detection platform in the way of the present invention is by shown in Figure 1; include Digital Simulation work station (8), RTDS Real Time Digital Simulator (1), analog quantity output integrated circuit board (2), power amplifier (3), line protective devices to be measured (4), mimic-disconnecting switch (5), switch transition device (6) and the digital quantity input integrated circuit board (7) that can calculate in real time, can under power grid environment cooperates, carry out the line protective devices closed test.The real-timedigital simulation work station is connected with simulator RTDS by Ethernet, its operational mode is, digital simulator RTDS (1) is by the input of analog quantity of analog quantity output integrated circuit board (2) output to power amplifier (3), the voltage of power amplifier (3) output, the magnitude of current is linked into the analog acquisition passage of line protective devices (4), the branch that line protective devices (4) send, reclosing command is received the branch of mimic-disconnecting switch (5), closing circuit, in process of the test, change fault type and make line protective devices (4) action, make line protective devices send branch, reclosing command direct action is in the branch of mimic-disconnecting switch (5), closing circuit; Feed back to Real Time Digital Simulator disengagement failure electric current, finally form closed loop.In addition, in the process of test, regulate output of wind electric field size, the on high-tension side ground connection situation of wind energy turbine set main transformer, the adaptability when the comprehensive assessment line protective devices are used for wind energy turbine set.
By above-mentioned real-time simulation work station, can carry out all kinds of closed tests, the pilot project that can carry out according to test requirements document comprises: the district under the earth-free situation in wind energy turbine set main transformer high-pressure side, inside and outside instantaneity metallicity fault; District's inside and outside instantaneity metallicity fault under the ground connection situation of wind energy turbine set main transformer high-pressure side, permanent metallicity fault, transient state surmount test and test operate time of 70% place, developing fault, break down in transition Resistance Fault, system oscillation and vibration again, system frequency excursion, the charging of circuit idle-loaded switching-on, separate cyclization and hand crossed belt faulty line, TV broken string, TA saturation testing, TA broken string, DC power supply intermittently reaches DC power supply fluctuation check, recurrence of failure, the power and the operational mode of adjusting wind energy turbine set in the process of the test.
Implementation example: by 14 kinds of RTDS wind power system closed loop tests that models online line protective devices are carried out that tame protective relaying device equipment manufacturers of Shenzhen NARI Co., Ltd. etc. 7 are produced; discovery is principle protection (comprising longitudinal distance protection and distance protection) with the distance; performance when being used for large-scale wind electricity field wire road is unsatisfactory, repeatedly tripping and maloperation situation have occurred.In contrast; the performance factor that the differential current protection is used for wind energy turbine set is a hundred per cent; the clear and definite line protective devices that are main protection with vertical connection distance are not suitable for the technological standpoint of wind-powered electricity generation circuit, and there is significant impact in simultaneously clear and definite irrational wind-powered electricity generation protection configuration to system protection.According to this achievement in research, it is the device of main protection that clear and definite wind-powered electricity generation circuit main protection type selecting should be selected longitudinal differential in the electrical network scope of applicant location, and it should be able to satisfy the specific (special) requirements of wind-powered electricity generation apart from backup protection simultaneously.
In sum, utilize the scene record ripple figure of wind energy turbine set model and wind energy turbine set to test, simulated environment really and accurately can be provided, improved the checking possibility, and then line protective devices to be measured can used wind energy turbine set safely after detecting.
Claims (3)
1. one kind is used safely in the way of wind energy turbine set with line protective devices, and its total adaptability way comprises following content:
1) at first to set up a Real-Time Model, this simulation model promptly is a virtual power grid environment, virtual power grid environment wherein include wind energy turbine set, bus and transmission line, generator transformer group, current transformer, voltage transformer, etc. each fault point in valve system and the analogue system, be used for line protective devices are carried out real-time simulation test and monitoring;
2) secondly be to set up the test detection platform, this platform includes real-timedigital simulation work station (8), RTDS Real Time Digital Simulator (1), analog quantity output integrated circuit board (2), power amplifier (3), line protective devices (4), mimic-disconnecting switch (5), switch transition device (6) and digital quantity input integrated circuit board (7);
3) by the above-mentioned real-time simulation work station of setting up, line protective devices to be measured (X) are placed between power amplifier (3) and the mimic-disconnecting switch (6), can carry out all kinds of closed tests and detect.
2. a kind of way that line protective devices is used safely in wind energy turbine set according to claim 1; it is characterized in that: in the described virtual power grid environment; bus wherein is at least four; at least three of transmission lines; adopt closed-loop fashion to be connected with circuit breaker with the valve system such as grade; its concrete connected mode is: wind energy turbine set is by circuit breaker DL1; DL2 is connected with circuit LN; the other side of circuit LN is passed through circuit breaker DL3 and is connected with waiting valve system; the synchronous generator transformer group is passed through DL4; DL5; transmission line MN1; DL6 is connected with waiting valve system; transmission line MN2 is in parallel with MN1; the circuit breaker of both sides is respectively DL7; DL8; voltage transformer TV1 is installed on wind field 220kV bus; voltage transformer TV2 is installed on equivalent system side bus; current transformer TA1 is installed on the wind energy turbine set side of circuit LN; current transformer TA2 is installed on the system side of circuit LN; short circuit test point K1 is connected on the wind energy turbine set side 220kV bus; short circuit test point K2 is connected to the wind energy turbine set side of circuit LN; short circuit test point K3 is connected in the middle of the circuit LN; short circuit test point K4 is connected to the system side of circuit LN; short circuit test point K5 is connected on the equivalent system side bus, K6; K7; K8 is connected in the diverse location of circuit MN1.
3. a kind of way that line protective devices is used safely in wind energy turbine set according to claim 1; it is characterized in that: the real-timedigital simulation work station is connected with real-time simulator by Ethernet; wherein; the analog quantity of digital simulator RTDS (1) output outputs to the input of power amplifier (3) by analog quantity output integrated circuit board; the voltage of power amplifier (3) output; the magnitude of current is linked into the analog acquisition passage of line protective devices (4); the divide-shut brake loop that mimic-disconnecting switch (5) is received in the divide-shut brake instruction that line protective devices (4) send; the position contact of mimic-disconnecting switch (5) is connected with digital quantity input integrated circuit board (7) by switching value conversion equipment (6); thus; in experimentation, change fault type and make line protective devices (4) action; make it to send branch; reclosing command direct action is in the branch of mimic-disconnecting switch (5); closing circuit; finally feed back to Real Time Digital Simulator, the disengagement failure electric current finally forms closed loop test system.
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Cited By (15)
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| CN102419405A (en) * | 2011-11-16 | 2012-04-18 | 南方电网科学研究院有限责任公司 | System and method for carrying out closed-loop test on control protection device of megawatt-level energy storage station |
| CN102611192A (en) * | 2012-04-19 | 2012-07-25 | 中水北方勘测设计研究有限责任公司 | Power supply guiding and connecting device for middle-sized peak shaving hydropower station |
| CN102654549A (en) * | 2011-03-03 | 2012-09-05 | 华东电力试验研究院有限公司 | Parallel line fault simulation analysis platform based on real-time digital simulator |
| CN102866310A (en) * | 2012-07-18 | 2013-01-09 | 广东电网公司电力科学研究院 | Flexible simulation test platform for circuit protection device of power system |
| CN103970120A (en) * | 2013-12-20 | 2014-08-06 | 国家电网公司 | RTDS (real-time digital system) closed-loop testing method for energy storage variable-current controllers |
| CN103995729A (en) * | 2014-05-05 | 2014-08-20 | 中国南方电网有限责任公司电网技术研究中心 | Software system of analog simulation line protection device |
| CN103997023A (en) * | 2014-05-06 | 2014-08-20 | 国家电网公司 | 330kV circuit protection system for integration of wind power to AC-DC hybrid power grid |
| CN104090206A (en) * | 2014-06-16 | 2014-10-08 | 南方电网科学研究院有限责任公司 | DC measurement system test platform and test method for DC transmission project |
| CN104133133A (en) * | 2014-07-22 | 2014-11-05 | 国家电网公司 | Standardized test system of relay protection test room |
| CN104569669A (en) * | 2014-12-29 | 2015-04-29 | 国家电网公司 | Relay protection adaptability detection system and method based on moving die wind-solar complementary |
| CN104834229A (en) * | 2015-05-13 | 2015-08-12 | 国网智能电网研究院 | Power closed-loop real-time simulation test system and power closed-loop real-time simulation test method |
| CN106383278A (en) * | 2016-08-26 | 2017-02-08 | 全球能源互联网研究院 | Reconfigurable DC grid simulation test system |
| CN107039958A (en) * | 2017-06-09 | 2017-08-11 | 云南电力试验研究院(集团)有限公司 | The protection system to earth and method of a kind of wind power plant box type transformer low-pressure system |
| CN108562827A (en) * | 2018-03-13 | 2018-09-21 | 南方电网科学研究院有限责任公司 | Low-current grounding line selection method and system |
| CN113295942A (en) * | 2021-04-23 | 2021-08-24 | 四川华能宝兴河水电有限责任公司 | Relay protection device constant value checking system and method |
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| CN102419405A (en) * | 2011-11-16 | 2012-04-18 | 南方电网科学研究院有限责任公司 | System and method for carrying out closed-loop test on control protection device of megawatt-level energy storage station |
| CN102611192A (en) * | 2012-04-19 | 2012-07-25 | 中水北方勘测设计研究有限责任公司 | Power supply guiding and connecting device for middle-sized peak shaving hydropower station |
| CN102866310B (en) * | 2012-07-18 | 2015-03-04 | 广东电网公司电力科学研究院 | Flexible simulation test platform for circuit protection device of power system |
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| CN103970120A (en) * | 2013-12-20 | 2014-08-06 | 国家电网公司 | RTDS (real-time digital system) closed-loop testing method for energy storage variable-current controllers |
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| CN104133133A (en) * | 2014-07-22 | 2014-11-05 | 国家电网公司 | Standardized test system of relay protection test room |
| CN104133133B (en) * | 2014-07-22 | 2017-03-29 | 国家电网公司 | A kind of reaying protection test room standardized test system |
| CN104569669A (en) * | 2014-12-29 | 2015-04-29 | 国家电网公司 | Relay protection adaptability detection system and method based on moving die wind-solar complementary |
| CN104834229A (en) * | 2015-05-13 | 2015-08-12 | 国网智能电网研究院 | Power closed-loop real-time simulation test system and power closed-loop real-time simulation test method |
| CN104834229B (en) * | 2015-05-13 | 2018-01-19 | 国网智能电网研究院 | A kind of power closed loop real-time simulation test system and method |
| CN106383278A (en) * | 2016-08-26 | 2017-02-08 | 全球能源互联网研究院 | Reconfigurable DC grid simulation test system |
| CN107039958A (en) * | 2017-06-09 | 2017-08-11 | 云南电力试验研究院(集团)有限公司 | The protection system to earth and method of a kind of wind power plant box type transformer low-pressure system |
| CN107039958B (en) * | 2017-06-09 | 2019-11-01 | 云南电力试验研究院(集团)有限公司 | A kind of protection system to earth and method of wind power plant box type transformer low-pressure system |
| CN108562827A (en) * | 2018-03-13 | 2018-09-21 | 南方电网科学研究院有限责任公司 | Low-current grounding line selection method and system |
| CN113295942A (en) * | 2021-04-23 | 2021-08-24 | 四川华能宝兴河水电有限责任公司 | Relay protection device constant value checking system and method |
| CN113295942B (en) * | 2021-04-23 | 2022-03-08 | 四川华能宝兴河水电有限责任公司 | Relay protection device constant value checking system and method |
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