CN102208801B - 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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- CN102208801B CN102208801B CN201110144835.0A CN201110144835A CN102208801B CN 102208801 B CN102208801 B CN 102208801B CN 201110144835 A CN201110144835 A CN 201110144835A CN 102208801 B CN102208801 B CN 102208801B
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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 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 transformer unit of a power generator, a current mutual inductor, a 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 switching value 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 relay protection field, particularly relate to line protective devices wherein.
Background technology
The international situation requirement of environmental protection, low-carbon (LC), wind power generation installed capacity is impelled to grow at top speed, account for electrical network total installation of generating capacity ratio to improve constantly, but due to wind power-generating grid-connected, there is intermittence, randomness, serious negative effect can be brought to power network safety operation.Find based on to the analysis of extensive blower fan off-grid accident several times of somewhere electrical network and research; fault characteristic and the conventional power source of wind energy turbine set are not quite similar; existing line protective devices are made to there are the protection needs not too adapting to wind energy turbine set; another aspect; through inquiring about other technical equipment existing, also not yet find the data introduction that comparatively can be used on wind energy turbine set for line protective devices.Therefore the invention reside in and on the trend existing system protection device is improved using method.
Summary of the invention
The object of the present invention is to provide a kind of way existing line protective devices being effectively applied to wind energy turbine set; can realize carrying out randomness change to exert oneself size and the operational mode of wind energy turbine set, thus suitable net when examination line protective devices are used for wind energy turbine set.
Suitable net way of the present invention comprises following content:
1) Real-Time Model to first be set up.Namely described Real-Time Model is on the software systems RSCAD of RTDS, set up a virtual power grid environment; it include wind energy turbine set, bus, transmission line, generatortransformer unit, current transformer, voltage transformer, etc. each fault point in valve system and analogue system, for carrying out real-time simulation test and monitoring to line protective devices.
In above-mentioned virtual power grid environment, bus is at least four, transmission line is at least three, wind energy turbine set is connected with waiting valve system by single transmission back line LN, generatortransformer unit by double transmission-line MN1, MN2 with etc. valve system be connected, the each fault point be equipped with in test is arranged on diverse location place on each transmission line and main transformer high-pressure side and 220kV bus, be provided with eight Test to Failure points in this simulated environment altogether, regulated the size of fault type, trouble duration and transition resistance by operation test.
2) be secondly to set up testing inspection platform.This platform includes real-time simulation work station (8), RTDS Real Time Digital Simulator (1), analog output card (2), power amplifier (3), line protective devices (4), mimic-disconnecting switch device (5), switching value conversion equipment (6) and digital input card (7).During test; line protective devices (X) to be measured are linked into line protective devices (4) standby position of the simulation experiment system of simulation work station; after being placed in power amplifier; be connected with mimic-disconnecting switch device; this mimic-disconnecting switch device is connected with RTDS Real Time Digital Simulator again with digital input card by switching value conversion equipment; closed loop like this makes RTDS Real Time Digital Simulator can send secondary voltage and the secondary current of tested line protector both sides, reception be circuit breaker each position contact point signal.Carrying out practically mode is, RTDS Real Time Digital Simulator exports analog quantity by analog output card, through the voltage that power amplifier exports, the analog acquisition passage of magnitude of current line attachment protective device, what line protective devices (4) sent divides, reclosing command receives dividing of mimic-disconnecting switch device device (5), closing circuit, the position contact of mimic-disconnecting switch device (5) is connected with digital input card (7) by switching value conversion equipment (6), finally feed back to RTDS Real Time Digital Simulator, in process of the test, change fault type make line protective devices (4) action, make it to send point, reclosing command direct action in mimic-disconnecting switch device (5) point, closing circuit, mimic-disconnecting switch device (5) point, closing position contact feeds back to RTDS Real Time Digital Simulator, final disengagement failure electric current.
3) carry out all kinds of closed test by the above-mentioned testing inspection platform set up, line protective devices (X) are wherein UUT.The pilot project can carried out according to test requirements document comprises: instantaneity metallicity fault and permanent metal fault inside and outside the district in ground connection and earth-free situation is distinguished in wind energy turbine set main transformer high-pressure side, transitory waveform is tested, test operate time of 70% place, developing fault, through transition Resistance Fault, break down again in system oscillation and vibration, system frequency excursion, line no-load switching charges, separate cyclization, hand crossed belt faulty line, TV breaks, TA breaks, TA is saturated, interrupted and the DC power supply fluctuation check of DC power supply and recurrence of failure, power and the operational mode of regulating wind power field is come in above-mentioned all processs of the test, simultaneously, fault characteristic when haveing a wind energy turbine set fault according to test result analysis, thus confirm that line protective devices are for adaptability during wind energy turbine set, and promote that manufacturer is corrected principle, adjustable line protective devices make it the effect reaching available protecting wind-electricity integration thus.
Advantage of the present invention and good effect are:
First be to ensure that stand-by line protective devices energy effective and safe is in wind energy turbine set;
By the RTDS wind energy turbine set simulation model set up, can to during extensive voltage levels wind energy turbine set connecting system to its fault new features research, similar l-G simulation test place is provided;
By the application to this method, the line protective devices that can be clearly main protection with vertical distance are not suitable for the technological standpoint of wind-powered electricity generation circuit, and can specify irrational wind-powered electricity generation relaying configuration has significant impact to route protection simultaneously;
The achievement in research that this project provides, from the angle of electrical network, by the reasonable coordination of Wind turbines and line protective devices, makes Wind turbines can support electrical network when being necessary, avoids the extension of fault; For the wind-powered electricity generation investor, can to avoid when power network fluctuation, owing to running blower fan off-grid on a large scale, increasing its effective generating dutation.
Accompanying drawing explanation
Fig. 1 is real-time simulation operational system structural representation in way of the present invention
Fig. 2 is the simulating grid environment signal in way of the present invention.
Symbol in figure: DL
ifor circuit breaker, TV
ifor voltage transformer, TA
ifor current transformer, K
ifor fault point, L, M, N are bus.
Embodiment
Line protective devices are used safely in a way for wind energy turbine set, are substantially made up of three parts, be first to set up a Real-Time Model, this model has the characteristic of real-time simulation wind-driven generator power grid environment; On this basis, second step sets up pilot system detection platform, and this platform includes real-time simulation work station, RTDS Real Time Digital Simulator, analog output card, power amplifier, line protective devices, mimic-disconnecting switch device, switching value conversion equipment and digital input card; 3rd, run on basis at above-mentioned simulation work station, carry out testing inspection according to test requirements document.
Here; described real-time simulation work station is a computer management system; containing virtual power grid environment and real-time simulation moving model; virtual power grid environment wherein as shown in Figure 2; include each point failure Ki in wind energy turbine set, bus L, bus M, bus N, transmission line MN1, transmission line MN2, transmission line LN, generatortransformer unit, current transformer TA1 and TA2, voltage transformer TV1 and TV2 and analogue system and etc. valve system, for carrying out real-time simulation test and monitoring to line protective devices.Its concrete connected mode is: wind energy turbine set is connected with transmission line LN with circuit breaker DL2 by circuit breaker DL1, the other side of transmission line LN is passed through circuit breaker DL3 and is connected with waiting valve system, generatortransformer unit is then by following five circuit breaker DL4, DL5, DL6, DL7, DL8 and transmission line MN1, transmission line MN2 is connected with waiting valve system, wherein transmission line MN1 and transmission line MN2 is in parallel, the circuit breaker of transmission line MN1 both sides is respectively DL5, DL6, the circuit breaker of transmission line MN2 both sides is respectively DL7, DL8, voltage transformer TV1 is installed on wind farm side 220kV bus, voltage transformer TV2 is installed on equivalent system side bus, current transformer TA1 is installed on the wind farm side of transmission line LN, current transformer TA2 is installed on the equivalent system side of transmission line LN, short circuit test point K1 is connected on wind farm side 220kV bus, short circuit test point K2 is connected to the wind farm side of transmission line LN, short circuit test point K3 is connected in the middle of transmission line LN, short circuit test point K4 is connected to the equivalent system side of transmission line LN, short circuit test point K5 is connected on equivalent system side bus, three short circuit test point K6, K7, K8 is connected to the diverse location of transmission line MN1.
Operation test detection platform in way of the present invention as shown in Figure 1; include real-time simulation work station (8), RTDS Real Time Digital Simulator (1), analog output card (2), power amplifier (3), line protective devices to be measured (4), mimic-disconnecting switch device (5), switching value conversion equipment (6) and the digital input card (7) that can carry out calculating in real time, line protective devices closed test can be carried out under power grid environment coordinates.Real-time simulation work station is connected with RTDS Real Time Digital Simulator by Ethernet, its operational mode is, RTDS Real Time Digital Simulator (1) exports the input of an analog quantity to power amplifier (3) by analog output card (2), the voltage that power amplifier (3) exports, the magnitude of current is linked into the analog acquisition passage of line protective devices (4), what line protective devices (4) sent divides, reclosing command receives dividing of mimic-disconnecting switch device (5), closing circuit, in process of the test, change fault type make line protective devices (4) action, line protective devices are sent point, reclosing command direct action in mimic-disconnecting switch device (5) point, closing circuit, feed back to RTDS Real Time Digital Simulator disengagement failure electric current, final formation closed loop.In addition, in the process of test, exert oneself size and the on high-tension side Grounding of wind energy turbine set main transformer in regulating wind power field, and comprehensive assessment line protective devices are used for adaptability during wind energy turbine set.
By above-mentioned real-time simulation work station, all kinds of closed test can be carried out, the pilot project can carried out according to test requirements document comprises: instantaneity metallicity fault inside and outside the district in the earth-free situation in wind energy turbine set main transformer high-pressure side, instantaneity metallicity fault inside and outside district under the Grounding of wind energy turbine set main transformer high-pressure side, permanent metal fault, transitory waveform test and test operate time of 70% place, developing fault, through transition Resistance Fault, break down again in system oscillation and vibration, system frequency excursion, line no-load switching charges, separate cyclization and hand crossed belt faulty line, TV breaks, TA is saturated, TA breaks, DC power supply interrupted and DC power supply fluctuation and recurrence of failure etc., power and the operational mode of regulating wind power field is come in above-mentioned process of the test.
Implementation example: the wind power system closed loop test carried out by the 14 kinds of model online line protective devices produced 7 protective relaying device equipment manufacturers such as Shenzhen NARI Co., Ltd.; find with distance to be principle protection (comprising longitudinal distance protection and distance protection); unsatisfactory for performance during Large Scale Wind Farm Integration circuit, repeatedly tripping and maloperation situation are there is.In contrast; the performance factor that differential current protection is used for wind energy turbine set is absolutely; the line protective devices that to specify that with vertical distance be main protection are not suitable for the technological standpoint of wind-powered electricity generation circuit, specify that irrational wind-powered electricity generation relaying configuration exists significant impact to system protection simultaneously.According to this achievement in research within the scope of the electrical network of applicant location, clear and definite wind-powered electricity generation power line main protection type selecting should select longitudinal differential to be the device of main protection, and its distance backup protection simultaneously should be able to meet the particular/special requirement of wind-powered electricity generation.
In sum, utilize the scene of wind energy turbine set model and wind energy turbine set to record ripple figure and test, simulated environment really and accurately can be provided, improve checking reliability, and then line protective devices to be measured can use wind energy turbine set safely after detecting.
Claims (2)
1. line protective devices are used safely in a way for wind energy turbine set, its total adaptability way comprises following content:
1) Real-Time Model to first be set up, namely this Real-Time Model is a virtual power grid environment, by wind energy turbine set, bus, transmission line, generatortransformer unit, current transformer, voltage transformer, form Deng each fault point in valve system and analogue system, wherein: bus is at least four, transmission line at least three, closed-loop fashion is adopted to be connected with the circuit breaker in the virtual power grid environment of basis and valve system such as grade, concrete connected mode is: wind energy turbine set is connected with transmission line LN with circuit breaker DL2 by circuit breaker DL1, the other side of transmission line LN is passed through circuit breaker DL3 and is connected with waiting valve system, generatortransformer unit is then by following five circuit breaker DL4, DL5, DL6, DL7, DL8 and transmission line MN1, transmission line MN2 is connected with waiting valve system, wherein transmission line MN1 and transmission line MN2 is in parallel, the circuit breaker of transmission line MN1 both sides is respectively DL5, DL6, the circuit breaker of transmission line MN2 both sides is respectively DL7, DL8, voltage transformer TV1 is installed on wind farm side 220kV bus, voltage transformer TV2 is installed on equivalent system side bus, current transformer TA1 is installed on the wind farm side of transmission line LN, current transformer TA2 is installed on the equivalent system side of transmission line LN, short circuit test point K1 is connected on wind farm side 220kV bus, short circuit test point K2 is connected to the wind farm side of transmission line LN, short circuit test point K3 is connected in the middle of transmission line LN, short circuit test point K4 is connected to the equivalent system side of transmission line LN, short circuit test point K5 is connected on equivalent system side bus, three short circuit test point K6, K7, K8 is connected to the diverse location of transmission line MN1,
2) be secondly to set up testing inspection platform, this platform includes real-time simulation work station (8), RTDS Real Time Digital Simulator (1), analog output card (2), power amplifier (3), line protective devices (4), mimic-disconnecting switch device (5), switching value conversion equipment (6) and digital input card (7);
3) by the above-mentioned testing inspection platform set up, line protective devices (X) to be measured are placed between power amplifier (3) and mimic-disconnecting switch device (5), all kinds of closed test detection can be carried out.
2. a kind of way line protective devices being used safely in wind energy turbine set according to claim 1, it is characterized in that: real-time simulation work station (8) is connected with RTDS Real Time Digital Simulator (1) by Ethernet, wherein, the analog quantity that RTDS Real Time Digital Simulator (1) exports outputs to the input of power amplifier (3) by analog output card, the voltage that power amplifier (3) exports, the magnitude of current is linked into the analog acquisition passage of line protective devices (4), the divide-shut brake loop of mimic-disconnecting switch device (5) is received in the divide-shut brake instruction that line protective devices (4) send, the position contact of mimic-disconnecting switch device (5) is connected with digital input card (7) by switching value conversion equipment (6), thus, in experimentation, change fault type make line protective devices (4) action, make it to send point, reclosing command direct action in mimic-disconnecting switch device (5) point, closing circuit, finally feed back to RTDS Real Time Digital Simulator, disengagement failure electric current finally forms closed loop test system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110144835.0A CN102208801B (en) | 2011-05-24 | 2011-05-24 | Operation method for safely applying line protection device to wind power station |
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| CN201110144835.0A CN102208801B (en) | 2011-05-24 | 2011-05-24 | Operation method for safely applying line protection device to wind power station |
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| CN102208801A CN102208801A (en) | 2011-10-05 |
| CN102208801B true CN102208801B (en) | 2014-12-17 |
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| 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 |
| 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 |
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| 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 |
| 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 |
| CN103995729B (en) * | 2014-05-05 | 2017-11-07 | 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 |
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| 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 |
| 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 |
| CN106383278B (en) * | 2016-08-26 | 2020-12-04 | 全球能源互联网研究院 | Reconfigurable direct-current power grid simulation test 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 |
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