CN109884387B - Testing method of new energy grid-connected subsynchronous oscillation monitoring protection device - Google Patents
Testing method of new energy grid-connected subsynchronous oscillation monitoring protection device Download PDFInfo
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Abstract
The invention provides a testing method of a new energy grid-connected subsynchronous oscillation monitoring protection device, which constructs a simulation analysis model of a doubly-fed fan which is sent to an infinite system through series compensation based on RTDS, constructs a testing system for testing the performance and the function of the subsynchronous oscillation monitoring protection device, realizes the detection of the frequency precision, the amplitude precision and the protection function of a tested device through automatically adjusting the series compensation degree of the simulation analysis model and the PI gain of a converter, tests the anti-interference performance of the tested device through on-line roadside simulation ground fault, and simultaneously, the simulation model receives an action node of the tested device, can be used for researching the subsynchronous oscillation characteristic of a wind power field, thereby providing data support for the optimization of a device constant value setting and cutting strategy.
Description
Technical Field
The invention belongs to the technical field of power systems, and relates to a method for testing the performance and the function of a new energy grid-connected subsynchronous oscillation monitoring and protecting device.
Background
In recent years, new energy power generation and flexible power transmission technologies are widely applied, but the power grid is subjected to serious harmonic pollution due to a special electric energy generation mode, and the method is represented as follows: the harmonic frequency of the power grid is time-varying, a plurality of oscillation components coexist and are superposed on the power frequency component, the amplitude of the oscillation component is small, but the duration is long, the oscillation characteristic changes along with the grid structure and is not regular, the oscillation frequency is moderate, the oscillation frequency can penetrate through power electronic equipment and a traditional power grid so as to be transmitted along a power transmission channel, the influence range is wide, meanwhile, low-frequency harmonics easily cause the damage of power transmission and transformation equipment, so that the oscillation of a transformer and even high-frequency abnormal sound become an important incentive for threatening the stability of the power grid.
In order to solve the problem of subsynchronous oscillation of the power grid, a typical technical scheme is as follows: transforming PMU to make it have subsynchronous oscillation monitoring function, judging whether the oscillation component is out of limit, and triggering long wave recording if out of limit; upgrading a stability control device, collecting the electric quantity of a line, extracting oscillation power, and designing a protection functional element according to the amplitude of the oscillation power; the power grid subsynchronous oscillation monitoring and protecting device carries out subsynchronous/supersynchronous oscillation frequency self-adaptive identification on oscillation power, oscillation current and oscillation impedance according to the electric quantity, designs a protecting element by integrating a plurality of oscillation characteristics, optimizes a removal strategy and further realizes effective control on the problem of subsynchronous oscillation of the power grid;
at present, the testing method of the power grid subsynchronous oscillation monitoring and protecting device is static mode testing, the application introduces a dynamic testing method of the power grid subsynchronous oscillation monitoring and protecting device based on RTDS, the method discloses a testing system for testing the performance and the function of the subsynchronous oscillation monitoring and protecting device, the frequency and the amplitude precision of the tested device are automatically detected by adjusting the series compensation degree of a simulation analysis model and the PI gain of a converter through a given step length, model parameters do not need to be adjusted manually, the subsynchronous oscillation working condition is automatically screened, the protecting function testing of the tested device is supported, and the method has guiding and practical values.
Disclosure of Invention
The invention aims to provide a dynamic model test method for functions and performance of a new energy grid-connected subsynchronous oscillation monitoring protection device, which comprises the following steps:
step 1: and constructing a simulation analysis model of the doubly-fed fan which is sent to an infinite system through series compensation based on RTDS (real Time Digital simulator).
The time domain simulation model comprises the following modules: the system comprises a single power collection line model, a transformer model, a transmission line pi-type equivalent model, a fixed series compensation model and an infinite power grid equivalent model. The single-power-collecting-line model is formed by combining a double-fed fan, a machine-side converter, a grid-side converter and a box-type transformer, and the series compensation degree of the fixed series compensation model is input by controllable parameters. The concrete connection among each module is: and a plurality of current collection circuit models are connected into a bus, and are connected into a pi-shaped power transmission line through a transformer, and a power transmission line terminal is connected with a supplementary capacitor with controllable series compensation degree and is finally connected into an infinite power grid equivalent model.
Step 2: and (3) building a system for testing the performance and function of the new energy grid-connected subsynchronous oscillation monitoring protection device.
The system comprises the following modules: RTDS simulation system, power amplification equipment, subsynchronous oscillation monitoring protection device. The concrete connection mode among each module does: the RTDS simulation system outputs current and voltage signals to be connected to the power amplification equipment, the power amplification equipment accesses the processed signals to the subsynchronous oscillation monitoring protection device, and the subsynchronous oscillation monitoring protection device outputs circuit action signals to be accessed to the RTDS simulation system in a hard-wired mode.
And step 3: the test system based on above buildding carries out the device test, and the test content includes: the method comprises the following steps of testing the harmonic frequency precision and the tracking performance of a tested device (namely a subsynchronous oscillation monitoring and protecting device), testing the harmonic amplitude precision and the tracking performance of the tested device, testing the power frequency disturbance resistance of the protection function of the tested device, and testing the protection function of the tested device, and specifically comprises the following steps:
testing the harmonic frequency precision and the tracking performance of the device: the RTDS firstly sends out a pulse signal, the device is reset to an initial state, the line series compensation degree is adjusted by taking 5s as a step length, the initial series compensation degree is 5%, the stepping quantity is 5%, the final value series compensation degree is 90%, and the frequency values identified by the device to be tested under different series compensation degrees are recorded.
Testing the harmonic amplitude precision and the tracking performance of the device: the RTDS sends out a pulse signal, the device is reset to an initial state, the PI link gain of the double-fed fan machine side converter is adjusted by taking 5s as a step length, the initial gain is 1, the step amount is 0.2, the final gain is 5, and the harmonic current amplitude of the device to be tested under different PI gains is recorded.
Testing the power frequency disturbance resistance of the device: the RTDS sends out a pulse signal, the device is reset to an initial state, single-phase/two-phase/three-phase instantaneous ground faults are simulated on the power transmission line in sequence by taking 20s as a step length, the starting/action condition of the testing device is recorded, whether sub-synchronous oscillation occurs in wave recording data or not is analyzed, and whether the action condition of the device is reasonable or not is verified.
And (3) testing the protection function of the device: based on the test items, a plurality of simulation working conditions which really generate subsynchronous oscillation are screened out, the protection function of the device is put into use, proper protection function parameters and time are set, the RTDS sends out pulse signals to reset the device to an initial state, the simulation duration is 30s, and the reliability and the accuracy of the protection function of the device under various subsynchronous oscillation working conditions are analyzed.
The invention has the following beneficial effects:
(1) a simulation model of the doubly-fed wind turbine which is sent to an infinite system through series compensation is constructed on the RTDS platform.
(2) A test system for testing the performance and the function of the power grid subsynchronous oscillation monitoring and protecting device is set up.
(3) The method can be used for automatically testing the accuracy of the subsynchronous oscillation key parameters of the power grid without manually adjusting the model parameters.
(4) The device can be used for testing the anti-interference performance of the subsynchronous oscillation monitoring protection device.
(5) The device can be used for screening the subsynchronous oscillation working condition and testing the function of the protective element of the subsynchronous oscillation monitoring and protecting device.
(6) The method can be used for researching the subsynchronous oscillation characteristic of the wind power plant and providing data support for device constant value setting and cutting strategy optimization.
Drawings
FIG. 1 shows a simulation model structure diagram constructed based on RTDS;
FIG. 2 illustrates a test system for testing the performance and function of a sub-synchronous oscillation monitoring protection device;
FIG. 3 shows a new energy grid-connected subsynchronous oscillation monitoring protection device test method flow;
FIG. 4 shows the current waveform dynamics of the line with a series compensation 70 and a PI gain of 4;
FIG. 5 shows harmonic current amplitude dynamics calculated using S-variation;
fig. 6 shows a subsynchronous/supersynchronous current curve of the adaptive frequency extraction of the device under test.
Detailed Description
The technical scheme of the invention is further described in detail by combining the drawings and the specific embodiments in the specification.
Taking the problem of output subsynchronization of a 2MW doubly-fed induction type wind turbine in a certain wind plant as an example, the parameters of a single wind turbine are as follows:
TABLE 1 Single doubly-fed induction type Fan parameters
And establishing an RTDS equivalent model of the doubly-fed induction type fan which is transmitted to an infinite system through series compensation according to the parameters in the table, wherein the system model comprises a single-power-collecting-line model, a transformer model, a power transmission line pi-type equivalent model, a fixed series compensation model and an infinite power grid equivalent model, the single-power-collecting-line model is formed by combining a doubly-fed fan, a machine side converter, a grid side converter and a box type transformer, and the series compensation degree of the fixed series compensation model is input by controllable parameters. The concrete connection among each module is: and a plurality of current collection circuit models are connected into a bus, and are connected into a pi-shaped power transmission line through a transformer, and a power transmission line terminal is connected with a supplementary capacitor with controllable series compensation degree and is finally connected into an infinite power grid equivalent model. The structure of the simulation model is shown in FIG. 1.
The simulation model software is operated on RTDS equipment, and RTDS can output voltage and current signals in a simulation model, but the amplitude of the signals is small, the signals need to be accessed into a device after being accessed into power amplification equipment, an RTDS analog quantity output port is connected with the power amplification equipment, the power amplification equipment outputs current/voltage signals of 6 collector lines to a tested device (namely a subsynchronous oscillation monitoring protection device), line action signals of the tested device are accessed into an RTDS digital quantity input port in a hard wiring mode, and simultaneously the RTDS outputs pulse signals to the tested device, so that closed-loop control is formed, and finally a test system diagram of the subsynchronous oscillation monitoring protection device is set up as shown in figure 2.
According to the test system built above, the test flow of the subsynchronous oscillation monitoring and protecting device is shown in fig. 3. The subsynchronous oscillation monitoring and protecting device needs to meet the following basic functions: adaptively detecting line harmonic frequency; tracking and determining the oscillation amplitude under the harmonic frequency; aiming at the protection function after the harmonic wave is out of limit; power frequency interference is resisted, and if the voltage/current of the line is power frequency quantity, the device does not act; by automatically adjusting the model parameters, subsynchronous oscillation with different frequencies and different amplitudes is excited, and the protection function and the anti-interference performance of the device are tested.
Because the oscillation frequency and the oscillation amplitude are related to the model parameters, the off-line calculation results of different parameters and the device test values need to be compared, and whether the detection precision and the action of the device are correct or not is verified.
Automatic testing of harmonic frequency of the device: and (4) exiting the protection function of the device, sending a pulse signal by the RTDS, resetting the device to an initial state, and setting the line series compensation degree by taking 5s as a step length, wherein the initial series compensation degree is 20%, the stepping quantity is 10% and the final value series compensation degree is 80%. And starting simulation, wherein the frequency value detected by the recording device is shown in the following table, and the recording data in the simulation process is subjected to S conversion to calculate the oscillation frequency and is recorded in the following table, wherein the data in the table shows that the error between the detected frequency of the detected device and the oscillation frequency calculated off line is less than 0.1 Hz.
TABLE 2 harmonic current frequency at different series compensations
| Degree of compensation of |
20％ | 30％ | 40％ | 50％ | 60％ | 70％ | 80％ |
| Series compensation capacitor (uF) | 100 | 150 | 200 | 250 | 300 | 350 | 400 |
| Oscillation frequency (Hz) of device detection | 15.1 | 20.4 | 25.8 | 30.7 | 35.2 | 39.7 | 44.6 |
| S variation calculated oscillation frequency (Hz) | 15.22 | 20.35 | 25.88 | 30.63 | 35.11 | 39.86 | 44.67 |
Automatic testing of harmonic amplitude of the device: and (4) exiting the protection function of the device, sending a pulse signal by the RTDS, resetting the device to an initial state, setting the series compensation degree to be 70%, adjusting the PI link gain of the double-fed fan machine side converter by taking 5s as a step length, setting the initial gain to be 1, setting the step amount to be 0.2, setting the final gain to be 5, and recording the harmonic current amplitude of the tested device under different PI gains. The line current waveform is shown in fig. 4 when the gain is 4, the S-transform calculated harmonic current amplitude dynamic curve is shown in fig. 5, and the oscillation current curve of the device test is shown in fig. 6. Tests show that the subsynchronous/supersynchronous dynamics extracted by the tested device are consistent with the offline analysis result and have similar amplitude values.
Testing the power frequency disturbance resistance of the device: and (3) putting the device into a protection function, sending a pulse signal by the RTDS, resetting the device to an initial state, performing series compensation withdrawal, sequentially simulating single-phase/two-phase/three-phase instantaneous ground faults on the power transmission line by taking 20s as a step length, recording the starting/action condition of the testing device, analyzing whether the recording data generates subsynchronous oscillation, and verifying whether the action condition of the device is reasonable.
The RTDS wave recording analysis shows that after three-phase faults, current and voltage are suddenly changed, signals are recovered after 3 cycles, and subsynchronous oscillation of a power grid is not excited, so that the protection function of the device should not be started, and an action message should not be sent.
And (3) testing the protection function of the device: based on the test items, the PI gain is selected to be 4, the series compensation degree is 70%, and the simulation duration is 30s to carry out the protection function test of the tested device. The test procedure was as follows: the device protection function is put into operation, the current protection amplitude constant value 2A and the time constant value 10s are set, the simulation is started, the current waveform of the collector wire and the extracted subsynchronous/supersynchronous current waveform are shown in fig. 4 and 6, the harmonic current protection operation condition of the device is met, and the harmonic current element of the device operates.
The above is only one embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (2)
1. A testing method for a new energy grid-connected subsynchronous oscillation monitoring protection device comprises the following steps:
step 1: a simulation analysis model of a doubly-fed fan sent to an infinite system through series compensation is constructed based on RTDS (real Time Digital simulator), and the simulation analysis model comprises the following models: the system comprises a single power collection line model, a transformer model, a transmission line pi-type equivalent model, a fixed series compensation model and an infinite power grid equivalent model; the single-power-collecting-line model is formed by combining a double-fed fan, a machine-side converter, a grid-side converter and a box-type transformer; the series compensation degree of the fixed series compensation model is input by controllable parameters;
step 2: building a system for testing the performance and the function of the new energy grid-connected subsynchronous oscillation monitoring protection device; the system set up in step 2 comprises the following modules: the system comprises an RTDS simulation system, power amplification equipment and a subsynchronous oscillation monitoring protection device; the concrete connection mode among each module does: the RTDS simulation system outputs current and voltage signals to be connected to power amplification equipment, the power amplification equipment accesses the processed signals to a subsynchronous oscillation monitoring and protecting device, and the subsynchronous oscillation monitoring and protecting device outputs circuit action signals to be accessed to the RTDS simulation system in a hard-wired mode, so that closed-loop control is formed;
and step 3: the test system based on above buildding carries out the device test, and the test content includes: testing the harmonic frequency precision and the tracking performance of a tested device, testing the harmonic amplitude precision and the tracking performance of the tested device, testing the protection function of the tested device against power frequency disturbance, and testing the protection function of the tested device, wherein the tested device is a subsynchronous oscillation monitoring protection device;
the specific mode of testing the harmonic frequency precision and the tracking performance of the device is as follows: the RTDS firstly sends out a pulse signal, the device is reset to an initial state, the line series compensation degree is adjusted by taking 5s as a step length, the initial series compensation degree is 5%, the stepping quantity is 5%, the final value series compensation degree is 90%, and the frequency values identified by the device to be tested under different series compensation degrees are recorded;
the specific mode of testing the harmonic amplitude precision and the tracking performance of the device is as follows: the RTDS sends out a pulse signal, the device is reset to an initial state, the PI link gain of the double-fed fan machine side converter is adjusted by taking 5s as a step length, the initial gain is 1, the step amount is 0.2, the final gain is 5, and the harmonic current amplitude of the device to be tested under different PI gains is recorded;
the specific test mode of the device for resisting power frequency disturbance is as follows: the RTDS sends out a pulse signal, the device is reset to an initial state, single-phase/two-phase/three-phase instantaneous ground faults are simulated on the power transmission line in sequence by taking 20s as a step length, the starting/action condition of the testing device is recorded, whether sub-synchronous oscillation occurs in wave recording data or not is analyzed, and whether the action condition of the device is reasonable or not is verified;
the device protection function test specifically comprises the following steps: based on the power frequency disturbance resistance test of the device, a plurality of simulation working conditions which really generate subsynchronous oscillation are screened out, the protection function of the device is put into use, proper protection function parameters and time are set, the RTDS sends out pulse signals to reset the device to an initial state, the simulation time is 30s, and the reliability and the accuracy of the protection function of the device under various subsynchronous oscillation working conditions are analyzed.
2. The testing method of the new energy grid-connected subsynchronous oscillation monitoring and protecting device according to claim 1, characterized by comprising the following steps of: the concrete connection among each model is as follows: and a plurality of current collection circuit models are connected into a bus, and are connected into a pi-shaped power transmission line through a transformer, and a power transmission line terminal is connected with a supplementary capacitor with controllable series compensation degree and is finally connected into an infinite power grid equivalent model.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118036A (en) * | 2009-12-31 | 2011-07-06 | 中国神华能源股份有限公司 | Moving die test method by use of restraint subsynchronous resonance (SSR) device |
| CN103105844A (en) * | 2011-11-14 | 2013-05-15 | 华北电力科学研究院有限责任公司 | Detection method and detection system of generator sub-synchronous resonance generator terminal damping controller |
| CN103997047A (en) * | 2014-05-16 | 2014-08-20 | 江苏大学 | Subsynchronous oscillation modeling method for point-to-network system |
| CN205280152U (en) * | 2016-01-12 | 2016-06-01 | 国家电网公司 | Wind -powered electricity generation subsynchronous oscillation monitoring system |
| CN105785267A (en) * | 2015-10-31 | 2016-07-20 | 南京南瑞继保电气有限公司 | Torsional oscillation protection test device |
| CN106020168A (en) * | 2016-06-30 | 2016-10-12 | 华北电力科学研究院有限责任公司 | Doubly-fed wind turbine sub synchronous resonance hardware in-loop test system and method |
| CN205721145U (en) * | 2016-03-07 | 2016-11-23 | 国网江西省电力科学研究院 | A kind of dynamic real-time simulator test model device of dual feedback wind power generation system |
| CN106443263A (en) * | 2016-10-11 | 2017-02-22 | 上海思源弘瑞自动化有限公司 | System and method for testing sub-synchronous oscillation suppression of SVG (Static Var Generator) based on RTDS (Real Time Digital Simulator) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1029647C (en) * | 1994-01-31 | 1995-08-30 | 清华大学 | Method and instrument for monitoring subsynchronous oscillation of electrical power system |
| AU2011265563B2 (en) * | 2010-12-24 | 2016-09-22 | Commonwealth Scientific And Industrial Research Organisation | System and method for detecting and/or diagnosing faults in multi-variable systems |
| US20120215368A1 (en) * | 2011-02-23 | 2012-08-23 | Nec Laboratories America, Inc. | Storage integrated management systems for energy microgrids |
-
2019
- 2019-02-21 CN CN201910130217.7A patent/CN109884387B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118036A (en) * | 2009-12-31 | 2011-07-06 | 中国神华能源股份有限公司 | Moving die test method by use of restraint subsynchronous resonance (SSR) device |
| CN103105844A (en) * | 2011-11-14 | 2013-05-15 | 华北电力科学研究院有限责任公司 | Detection method and detection system of generator sub-synchronous resonance generator terminal damping controller |
| CN103997047A (en) * | 2014-05-16 | 2014-08-20 | 江苏大学 | Subsynchronous oscillation modeling method for point-to-network system |
| CN105785267A (en) * | 2015-10-31 | 2016-07-20 | 南京南瑞继保电气有限公司 | Torsional oscillation protection test device |
| CN205280152U (en) * | 2016-01-12 | 2016-06-01 | 国家电网公司 | Wind -powered electricity generation subsynchronous oscillation monitoring system |
| CN205721145U (en) * | 2016-03-07 | 2016-11-23 | 国网江西省电力科学研究院 | A kind of dynamic real-time simulator test model device of dual feedback wind power generation system |
| CN106020168A (en) * | 2016-06-30 | 2016-10-12 | 华北电力科学研究院有限责任公司 | Doubly-fed wind turbine sub synchronous resonance hardware in-loop test system and method |
| CN106443263A (en) * | 2016-10-11 | 2017-02-22 | 上海思源弘瑞自动化有限公司 | System and method for testing sub-synchronous oscillation suppression of SVG (Static Var Generator) based on RTDS (Real Time Digital Simulator) |
Non-Patent Citations (1)
| Title |
|---|
| 双馈风电场经串补并网引起的次同步振荡分析与监控;李江;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20170715(第07期);第C042-249页 * |
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