CN117269654B - Method and device for testing and evaluating phase jump active response characteristics of network-structured converter - Google Patents
Method and device for testing and evaluating phase jump active response characteristics of network-structured converter Download PDFInfo
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Abstract
The invention relates to the technical field of new energy active support power grids, and particularly provides a method and a device for testing and evaluating phase jump active response characteristics of a grid-structured converter, wherein the method comprises the following steps: setting the running state of the network-structured converter to be tested as a test state; adjusting the gear of a passive phase jump device in a pre-built network-structured converter testing system so as to enable the pre-built network-structured converter testing system to generate phase jumps for preset times; acquiring a power curve of a measuring point in the pre-constructed grid-constructed converter test system, and carrying out phase jump active response characteristic test evaluation on the to-be-tested grid-constructed converter based on the power curve; the technical scheme provided by the invention can accurately and effectively quantitatively evaluate the phase change active supporting capacity of the grid-structured converter, and provides a referential grid-structured phase change active supporting capacity test evaluation method for product type tests of manufacturers and on-site detection of the converter while proving the grid-structured control active supporting capacity.
Description
Technical Field
The invention relates to the technical field of new energy active support power grids, in particular to a method and a device for testing and evaluating phase jump active response characteristics of a grid-structured converter.
Background
Currently, as shown in fig. 1, a field test system for a converter and a new energy power generation unit generates different test signal waveforms by simulating modulation of a power electronic converter in a power supply so as to test grid connection performance of the converter.
The active power regulation of the grid-connected inverter is different from the power command control strategy of the traditional grid-connected inverter, does not depend on the PLL to track the voltage phase of the power grid, automatically generates a phase angle through the deviation of the frequency of the access point to carry out the active power regulation, can effectively improve the control capability of frequency abnormal events, and is considered as a feasible solution for improving the intensity of a weak power grid and supporting high-proportion access of new energy. The phase change active control block diagram is shown in figure 2. In the drawing the view of the figure,P eref 、P e respectively an output power reference value and an actual value of the grid-formed converter;ω 0 is the rated angular frequency;J、Drespectively representing digital inertia and damping coefficient;ω v and deltaω v The actual angular frequency and angular frequency deviation inside the converter are respectively;θ v 、θ g the internal phase and the network side phase of the converter are respectively delta θIs thatθ v Andθ g the phase difference between the two;K p is reactance damping;sis a differential operator. It can be seen that when the network side phase jumps, the active power output by the network-structured converter is related to digital inertia, digital damping and reactance damping.
Currently, a grid-structured converter is considered as a feasible solution for improving weak current grid strength and supporting high-proportion access of new energy through simulating inertia and damping control of a synchronous generator. And the power supporting capability of the grid-connected converter in voltage/frequency step can be evaluated by referring to the power control characteristic evaluation method of the traditional grid-connected converter. However, under weak current network, when the impedance of the power network changes or under fault condition, obvious phase jump occurs at the grid-connected point of the converter, and further research is needed to quantitatively evaluate the active response characteristic of the grid-structured converter.
In the prior art, a network-structured converter phase change active response characteristic test scheme based on an active phase jump generating device is applied, the amplitude of phase jump is preset, then a PWM wave modulation method is utilized to generate a voltage waveform of a corresponding phase, the voltage waveform is connected into a tested converter, and the phase change active response characteristic of the converter is qualitatively analyzed according to the test waveform.
However, the test capacity of the scheme is limited, and the scheme is generally only suitable for field test of power generation units/single units with the power of less than 10MW in a strong network when the scheme is independently used, and meanwhile, excitation surge current influence generated by phase change in the test process cannot be weakened, the characteristic that the strength and the phase of a power grid are coupled and changed cannot be simulated, and quantitative analysis cannot be performed on the phase change active response characteristic of the grid-structured converter.
Disclosure of Invention
In order to overcome the defects, the invention provides a method and a device for testing and evaluating the phase jump active response characteristics of a network-structured converter.
In a first aspect, a method for evaluating a phase jump active response characteristic test of a grid-structured converter is provided, where the method for evaluating the phase jump active response characteristic test of the grid-structured converter includes:
setting the running state of the network-structured converter to be tested as a test state;
adjusting the gear of a passive phase jump device in a pre-built network-structured converter testing system so as to enable the pre-built network-structured converter testing system to generate phase jumps for preset times;
acquiring a power curve of a measuring point in the pre-constructed grid-constructed converter test system, and carrying out phase jump active response characteristic test evaluation on the to-be-tested grid-constructed converter based on the power curve;
The pre-constructed network-structured converter testing system comprises a passive phase jump device, a box-type transformer, a network-structured converter to be tested and an energy storage battery which are connected in sequence.
Preferably, the setting the operation state of the network transformer to be tested to the test state includes:
setting the to-be-tested network-structured converter to work in a charging state or a discharging state, operating at 50% of rated capacity, setting reactive output to be zero, and closing all additional frequencies and active controls.
Preferably, the passive phase jump device includes: reactor L1, reactor L2, reactor L3, reactor L4, reactor L5, reactor L6, shift switch CB1, shift switch CB2, shift switch KM1, shift switch KM2, and resistor R;
the reactor L1, the reactor L2, the reactor L3 and the gear switch KM1 are sequentially connected in series and then connected with one end of a resistor R;
the reactor L4, the reactor L5, the reactor L6 and the gear switch CB2 are sequentially connected in series and then connected with one end of the resistor R;
the connection point between the reactor L2 and the reactor L3 is connected with one end of a rear connection resistor R of a gear switch KM 2;
the other end of the resistor R is connected with an end-side connection point of the passive phase jump device;
The reactor L1 and the reactor L4 are respectively connected with a network side connection point of the passive phase jump device;
and a gear switch CB1 is connected between a network side connecting point of the passive phase jump device and an end side connecting point of the passive phase jump device.
Preferably, the gear of the passive phase jump device in the pre-built network-structured converter testing system is adjusted, so that the amplitude of each phase jump is within a preset range in the process of generating the preset number of phase jumps by the pre-built network-structured converter testing system.
Further, the preset number of times is 4, and the preset range is 10 ° to 60 °.
Further, the amplitude of the phase jump is as follows:
in the above, deltaθAs the magnitude of the phase jump,θ 0 、θ 1 the electric potentials in the converter before and after phase angle jump are respectively,R g 、X g the internal resistance and the internal reactance of the power grid are respectively,R t 、X t the equivalent resistance and the equivalent reactance of the passive phase jump generating device are respectively,X in 、X tr the internal reactance and the box-type variable reactance of the converter are respectively.
Further, the equivalent reactance of the passive phase jump generating device is as follows:
in the above description, L1, L2, L3, L4, L5, and L6 are inductance values of the reactor L1, the reactor L2, the reactor L3, the reactor L4, the reactor L5, and the reactor L6 in the passive phase jump device, ω is an angular frequency, and CB1, CB2, KM1, and KM2 are numbers of the gear switch in the passive phase jump generating device.
Further, the internal resistance and internal reactance of the power grid are as follows:
in the above-mentioned method, the step of,I 0 for the magnitude of the net side current before the phase angle jump,U g0 for the network side voltage before the phase angle jump,αis the network side phase angle difference before the phase angle jump.
Preferably, the measuring point comprises: and a network side measuring point between the passive phase jump device and the box-type transformer and an end side measuring point between the box-type transformer and the network-type transformer to be tested.
Preferably, the step of performing phase jump active response characteristic test evaluation on the to-be-tested grid-connected converter based on the power curve includes:
determining a phase jump active response characteristic index value of the to-be-detected network-structured converter based on the power curve;
if the phase jump active response characteristic index value of the to-be-tested network-structured converter meets a preset constraint condition, the phase jump active response capability of the to-be-tested network-structured converter is qualified, otherwise, the phase jump active response capability of the to-be-tested network-structured converter is not qualified.
Further, the phase jump active response characteristic index value of the to-be-detected network-structured converter comprises at least one of the following: phase change active control deviation, overshoot, response time and regulation time of the network-structured converter to be tested.
Further, the phase change active control deviation of the to-be-detected grid-connected converter is the difference between the theoretical extremum of the phase change active control and the extremum of the power curve;
the overshoot of the to-be-tested grid-built converter is the difference between the maximum value of the power curve and the active initial value of the to-be-tested grid-built converter;
the response time of the to-be-tested network-built converter is the time from the phase jump time to 90% of the time required for the phase change active adjustment quantity to reach the difference between the theoretical extremum of the phase change active control and the active initial value of the to-be-tested network-built converter;
the adjusting time of the to-be-measured grid-connected converter is the shortest time from the phase jump time to the active power fluctuation of the to-be-measured grid-connected converter which is not more than +/-1% of the rated output.
Further, the theoretical extremum of the phase change active control is as follows:
in the above-mentioned method, the step of,I ea 、I eb 、I ec tank transformer excitation surge currents with a, b and c phases respectively are at polesAmplitude, delta at point in timeP t1 As a theoretical extremum for phase change active control,E 1 for the potential in the converter after the phase angle jump,θ 0 、θ 1 the electric potentials in the converter before and after phase angle jump are respectively,U g1 as the magnitude of the network side voltage after the phase jump,R g is the internal resistance of the electric network,R t is the equivalent resistance of the passive phase jump generating device, X t Is the equivalent reactance of the passive phase jump generating means,X in 、X tr the internal reactance and the box-type variable reactance of the converter are respectively.
Further, the case-changing excitation inrush currents of the a, b and c phases are at the times corresponding to the maximum values of the case-changing magnetic fluxes of the a, b and c phases at the extreme point times, and the case-changing magnetic flux corresponding curve expressions of the a, b and c phases are as follows:
in the above, phi a 、Φ b 、Φ c Box-type variable magnetic flux with a, b and c phases respectively, phi SY For the remanence of the box transformer,βfor the phase angle jump magnitude,U g1m the amplitude of the network side voltage is ω is angular frequency, and t is the current time.
Further, the preset constraint condition includes at least one of the following: the phase change active control deviation of the to-be-tested grid-structured converter is not more than 10%, the overshoot of the to-be-tested grid-structured converter is not more than 20%, the response time of the to-be-tested grid-structured converter is not more than 20ms, and the adjustment time of the to-be-tested grid-structured converter is not more than 150ms.
In a second aspect, a device for testing and evaluating phase jump active response characteristics of a grid-structured converter is provided, where the device includes:
the setting module is used for setting the running state of the network construction type converter to be tested into a test state;
The adjusting module is used for adjusting the gear of the passive phase jump device in the pre-built network-structured converter testing system so as to enable the pre-built network-structured converter testing system to generate phase jumps for a preset number of times;
the testing module is used for acquiring a power curve of a measuring point in the pre-constructed network-structured converter testing system and carrying out phase jump active response characteristic test evaluation on the network-structured converter to be tested based on the power curve;
the pre-constructed network-structured converter testing system comprises a passive phase jump device, a box-type transformer, a network-structured converter to be tested and an energy storage battery which are connected in sequence.
In a third aspect, there is provided a computer device comprising: one or more processors;
the processor is used for storing one or more programs;
and when the one or more programs are executed by the one or more processors, the method for testing and evaluating the phase jump active response characteristics of the network-structured converter is realized.
In a fourth aspect, a computer readable storage medium is provided, on which a computer program is stored, the computer program, when executed, implementing the method for evaluating the active response characteristic of a network-structured converter phase jump.
The technical scheme provided by the invention has at least one or more of the following beneficial effects:
the invention provides a method and a device for testing and evaluating phase jump active response characteristics of a network-structured converter, comprising the following steps: setting the running state of the network-structured converter to be tested as a test state; adjusting the gear of a passive phase jump device in a pre-built network-structured converter testing system so as to enable the pre-built network-structured converter testing system to generate phase jumps for preset times; acquiring a power curve of a measuring point in the pre-constructed grid-constructed converter test system, and carrying out phase jump active response characteristic test evaluation on the to-be-tested grid-constructed converter based on the power curve; the technical scheme provided by the invention can accurately and effectively quantitatively evaluate the phase change active supporting capacity of the network-structured converter, and provides a referential network-structured phase change active supporting capacity test evaluation method for product type tests of manufacturers and field detection of the converter while proving the network-structured control active supporting capacity, and is specific:
according to the passive phase jump generating device, the phase jump amplitude meeting the test requirement is generated by setting different reactance gears; the attenuation of excitation surge current generated in the test process is quickened by setting the resistor, so that the influence of the excitation surge current on a test result is reduced; meanwhile, the device has the capability of simulating the strength and phase coupling change characteristics of the power grid.
According to the evaluation method for the phase jump active branch response characteristics of the network-structured converter, the phase active support capacity of the converter is quantitatively evaluated through the phase change active control deviation, the overshoot, the response time and the adjustment time, and meanwhile, for exciting inrush current generated in the test process, an active support theoretical value calculation method containing compensating exciting inrush current is provided.
Drawings
Figure 1 is a block diagram of a prior art converter test system;
FIG. 2 is a block diagram of the phase change active control of a networked converter according to an embodiment of the invention;
fig. 3 is a schematic flow chart of main steps of a method for evaluating phase jump active response characteristics of a network-structured converter according to an embodiment of the present invention;
FIG. 4 is a block diagram of a grid-tied converter test system according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a passive phase jump generating device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of phase jump magnitude calculation according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a phase jump active response characteristic index value according to an embodiment of the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As disclosed in the background art, currently, as shown in fig. 1, for a field test system of a converter and a new energy power generation unit, different test signal waveforms are generated by simulating modulation of a power electronic converter in a power supply so as to test grid connection performance of the converter.
The active power regulation of the grid-connected inverter is different from the power command control strategy of the traditional grid-connected inverter, does not depend on the PLL to track the voltage phase of the power grid, automatically generates a phase angle through the deviation of the frequency of the access point to carry out the active power regulation, can effectively improve the control capability of frequency abnormal events, and is considered as a feasible solution for improving the intensity of a weak power grid and supporting high-proportion access of new energy. The phase change active control block diagram is shown in figure 2. In the drawing the view of the figure,P eref 、P e respectively an output power reference value and an actual value of the grid-formed converter;ω 0 is the rated angular frequency;J、Drespectively representing digital inertia and damping coefficient;ω v and deltaω v The actual angular frequency and angular frequency deviation inside the converter are respectively;θ v 、θ g the internal phase and the network side phase of the converter are respectively deltaθIs thatθ v Andθ g the phase difference between the two;K p is reactance damping;sis a differential operator. It can be seen that when the network side phase jumps, the active power output by the network-structured converter is related to digital inertia, digital damping and reactance damping.
Currently, a grid-structured converter is considered as a feasible solution for improving weak current grid strength and supporting high-proportion access of new energy through simulating inertia and damping control of a synchronous generator. And the power supporting capability of the grid-connected converter in voltage/frequency step can be evaluated by referring to the power control characteristic evaluation method of the traditional grid-connected converter. However, under weak current network, when the impedance of the power network changes or under fault condition, obvious phase jump occurs at the grid-connected point of the converter, and further research is needed to quantitatively evaluate the active response characteristic of the grid-structured converter.
In the prior art, a network-structured converter phase change active response characteristic test scheme based on an active phase jump generating device is applied, the amplitude of phase jump is preset, then a PWM wave modulation method is utilized to generate a voltage waveform of a corresponding phase, the voltage waveform is connected into a tested converter, and the phase change active response characteristic of the converter is qualitatively analyzed according to the test waveform.
However, the test capacity of the scheme is limited, and the scheme is generally only suitable for field test of power generation units/single units with the power of less than 10MW in a strong network when the scheme is independently used, and meanwhile, excitation surge current influence generated by phase change in the test process cannot be weakened, the characteristic that the strength and the phase of a power grid are coupled and changed cannot be simulated, and quantitative analysis cannot be performed on the phase change active response characteristic of the grid-structured converter.
In order to improve the problems, the invention provides a method and a device for testing and evaluating the phase jump active response characteristics of a network-structured converter, comprising the following steps: setting the running state of the network-structured converter to be tested as a test state; adjusting the gear of a passive phase jump device in a pre-built network-structured converter testing system so as to enable the pre-built network-structured converter testing system to generate phase jumps for preset times; acquiring a power curve of a measuring point in the pre-constructed grid-constructed converter test system, and carrying out phase jump active response characteristic test evaluation on the to-be-tested grid-constructed converter based on the power curve; the technical scheme provided by the invention can accurately and effectively quantitatively evaluate the phase change active supporting capacity of the network-structured converter, and provides a referential network-structured phase change active supporting capacity test evaluation method for product type tests of manufacturers and field detection of the converter while proving the network-structured control active supporting capacity, and is specific:
according to the passive phase jump generating device, the phase jump amplitude meeting the test requirement is generated by setting different reactance gears; the attenuation of excitation surge current generated in the test process is quickened by setting the resistor, so that the influence of the excitation surge current on a test result is reduced; meanwhile, the device has the capability of simulating the strength and phase coupling change characteristics of the power grid.
According to the evaluation method for the phase jump active branch response characteristics of the network-structured converter, the phase active support capacity of the converter is quantitatively evaluated through the phase change active control deviation, the overshoot, the response time and the adjustment time, and meanwhile, for exciting inrush current generated in the test process, an active support theoretical value calculation method containing compensating exciting inrush current is provided.
The above-described scheme is explained in detail below.
Example 1
Referring to fig. 3, fig. 3 is a flow chart illustrating main steps of a method for evaluating phase jump active response characteristics of a grid-connected converter according to an embodiment of the present invention. As shown in fig. 3, the method for testing and evaluating the phase jump active response characteristics of the grid-connected transformer in the embodiment of the invention mainly comprises the following steps:
step S101: setting the running state of the network-structured converter to be tested as a test state;
step S102: adjusting the gear of a passive phase jump device in a pre-built network-structured converter testing system so as to enable the pre-built network-structured converter testing system to generate phase jumps for preset times;
step S103: acquiring a power curve of a measuring point in the pre-constructed grid-constructed converter test system, and carrying out phase jump active response characteristic test evaluation on the to-be-tested grid-constructed converter based on the power curve;
The pre-constructed network-structured converter testing system comprises a passive phase jump device, a box-type transformer, a network-structured converter to be tested and an energy storage battery which are sequentially connected, as shown in fig. 4, wherein the measuring points comprise: and a network side measuring point between the passive phase jump device and the box-type transformer and an end side measuring point between the box-type transformer and the network-type transformer to be tested.
In this embodiment, the setting the operation state of the to-be-tested grid-connected converter to the test state includes:
setting the to-be-tested network-structured converter to work in a charging state or a discharging state, operating at 50% of rated capacity, setting reactive output to be zero, and closing all additional frequencies and active controls.
In this embodiment, as shown in fig. 5, the passive phase jump device includes: reactor L1, reactor L2, reactor L3, reactor L4, reactor L5, reactor L6, shift switch CB1, shift switch CB2, shift switch KM1, shift switch KM2, and resistor R;
the reactor L1, the reactor L2, the reactor L3 and the gear switch KM1 are sequentially connected in series and then connected with one end of a resistor R;
the reactor L4, the reactor L5, the reactor L6 and the gear switch CB2 are sequentially connected in series and then connected with one end of the resistor R;
The connection point between the reactor L2 and the reactor L3 is connected with one end of a rear connection resistor R of a gear switch KM 2;
the other end of the resistor R is connected with an end-side connection point of the passive phase jump device;
the reactor L1 and the reactor L4 are respectively connected with a network side connection point of the passive phase jump device;
and a gear switch CB1 is connected between a network side connecting point of the passive phase jump device and an end side connecting point of the passive phase jump device.
In this embodiment, the gear of the passive phase jump device in the pre-built grid-configured converter test system is adjusted, so that the amplitude of each phase jump is within a preset range in the process of generating a preset number of phase jumps by the pre-built grid-configured converter test system.
Wherein the preset times are 4, and the preset range is 10 degrees to 60 degrees.
In one embodiment, the amplitude of the phase jump is as follows:
in the above, deltaθAs the magnitude of the phase jump,θ 0 、θ 1 the electric potentials in the converter before and after phase angle jump are respectively,R g 、X g the internal resistance and the internal reactance of the power grid are respectively,R t 、X t the equivalent resistance and the equivalent reactance of the passive phase jump generating device are respectively,X in 、X tr the internal reactance and the box-type variable reactance of the converter are respectively.
In one embodiment, the equivalent reactance of the passive phase jump generating means is as follows:
in the above description, L1, L2, L3, L4, L5, and L6 are inductance values of the reactor L1, the reactor L2, the reactor L3, the reactor L4, the reactor L5, and the reactor L6 in the passive phase jump device, ω is an angular frequency, and CB1, CB2, KM1, and KM2 are numbers of the gear switch in the passive phase jump generating device.
The calculation schematic diagram of the phase jump amplitude corresponding to the passive phase jump device in different gears is shown in fig. 6, in the figure,I 0 、I 1 the current is output by the converter before and after phase angle jump;U g0 、U g1 the network side voltages before and after phase angle jump are respectively;E 0 、E 1 respectively the electric potentials in the converter before and after phase angle jump;θ 0 、θ 1 respectively the electric potentials in the converter before and after phase angle jump;R g 、X g respectively an internal resistance and an internal reactance of the power grid;R t 、X t the equivalent resistance and the equivalent reactance of the passive phase jump generating device are respectively;X in 、X tr respectively isThe internal reactance of the converter and the tank transformer reactance.
In one embodiment, the internal resistance and internal reactance of the grid are as follows:
in the above-mentioned method, the step of,I 0 for the magnitude of the net side current before the phase angle jump,U g0 for the network side voltage before the phase angle jump,αis the network side phase angle difference before the phase angle jump.
Furthermore, as can be seen from fig. 6, when a higher reactance gear of the phase jump generating device is engaged, the network-side voltage amplitude will be reduced due to the weakening of the network strength, which is also in line with the actual situation. This shows that the phase jump generating device has the capability of simulating the power grid strength and phase jump coupling change characteristics.
In this embodiment, the performing phase jump active response characteristic test evaluation on the to-be-tested grid-connected converter based on the power curve includes:
determining a phase jump active response characteristic index value of the to-be-detected network-structured converter based on the power curve;
if the phase jump active response characteristic index value of the to-be-tested network-structured converter meets a preset constraint condition, the phase jump active response capability of the to-be-tested network-structured converter is qualified, otherwise, the phase jump active response capability of the to-be-tested network-structured converter is not qualified.
The phase jump active response characteristic index value of the to-be-detected network-structured converter comprises at least one of the following: phase change active control deviation, overshoot, response time and regulation time of the network-structured converter to be tested.
In one embodiment, a schematic diagram of the phase jump active response characteristic index value is shown in fig. 7, in which, EFor the phase-change active control deviation,Mfor the phase-change active overshoot,t 1 for the response time of the phase change to be active,t 2 for the adjustment time of the phase change active power,specific:
the phase change active control deviation of the to-be-tested network-structured converter is the difference between the theoretical extremum of the phase change active control and the extremum of the power curve;
the overshoot of the to-be-tested grid-built converter is the difference between the maximum value of the power curve and the active initial value of the to-be-tested grid-built converter;
the response time of the to-be-tested network-built converter is the time from the phase jump time to 90% of the time required for the phase change active adjustment quantity to reach the difference between the theoretical extremum of the phase change active control and the active initial value of the to-be-tested network-built converter;
the adjusting time of the to-be-measured grid-connected converter is the shortest time from the phase jump time to the active power fluctuation of the to-be-measured grid-connected converter which is not more than +/-1% of the rated output.
In one embodiment, the theoretical extremum of the phase change active control is as follows:
in the above-mentioned method, the step of,I ea 、I eb 、I ec amplitude, delta of box transformer excitation surge currents with a, b and c phases at extreme point momentP t1 As a theoretical extremum for phase change active control,E 1 for the potential in the converter after the phase angle jump, θ 0 、θ 1 The electric potentials in the converter before and after phase angle jump are respectively,U g1 as the magnitude of the network side voltage after the phase jump,R g is the internal resistance of the electric network,R t is the equivalent resistance of the passive phase jump generating device,X t is the equivalent reactance of the passive phase jump generating means,X in 、X tr the internal reactance and the box-type variable reactance of the converter are respectively.
In one embodiment, the case-changing excitation inrush currents of the a, b, and c phases are at the times corresponding to the maximum values of the case-changing magnetic fluxes of the a, b, and c phases at the extreme point times, and the case-changing magnetic flux corresponding curve expressions of the a, b, and c phases are as follows:
in the above, phi a 、Φ b 、Φ c Box-type variable magnetic flux with a, b and c phases respectively, phi SY For the remanence of the box transformer,βfor the phase angle jump magnitude,U g1m the amplitude of the network side voltage is ω is angular frequency, and t is the current time.
In one embodiment, the preset constraints include at least one of: the phase change active control deviation of the to-be-tested grid-structured converter is not more than 10%, the overshoot of the to-be-tested grid-structured converter is not more than 20%, the response time of the to-be-tested grid-structured converter is not more than 20ms, and the adjustment time of the to-be-tested grid-structured converter is not more than 150ms.
In a specific embodiment, the test is performed in the application scenario shown in fig. 4, and the test flow is as follows:
(a) The grid-formed converter operates in a charged state and at 50% rated capacity, the reactive output is zero, and all additional frequency and active control are turned off;
(b) The passive phase jump device is adjusted to different gears to generate different phase jumps, and the phase jumps with different amplitudes between 10 degrees and 60 degrees are required to be carried out for 4 times;
(c) Recording waveforms of active power, reactive power, voltage, current and frequency of the network side and the machine side within 10 seconds after phase step change;
(d) Changing the network-structured converter into a discharge state, and repeating the testing steps (a) - (c).
Example 2
Based on the same inventive concept, the invention also provides a device for testing and evaluating the phase jump active response characteristics of the grid-structured converter, which comprises:
the setting module is used for setting the running state of the network construction type converter to be tested into a test state;
the adjusting module is used for adjusting the gear of the passive phase jump device in the pre-built network-structured converter testing system so as to enable the pre-built network-structured converter testing system to generate phase jumps for a preset number of times;
the testing module is used for acquiring a power curve of a measuring point in the pre-constructed network-structured converter testing system and carrying out phase jump active response characteristic test evaluation on the network-structured converter to be tested based on the power curve;
The pre-constructed network-structured converter testing system comprises a passive phase jump device, a box-type transformer, a network-structured converter to be tested and an energy storage battery which are connected in sequence.
Preferably, the setting the operation state of the network transformer to be tested to the test state includes:
setting the to-be-tested network-structured converter to work in a charging state or a discharging state, operating at 50% of rated capacity, setting reactive output to be zero, and closing all additional frequencies and active controls.
Preferably, the passive phase jump device includes: reactor L1, reactor L2, reactor L3, reactor L4, reactor L5, reactor L6, shift switch CB1, shift switch CB2, shift switch KM1, shift switch KM2, and resistor R;
the reactor L1, the reactor L2, the reactor L3 and the gear switch KM1 are sequentially connected in series and then connected with one end of a resistor R;
the reactor L4, the reactor L5, the reactor L6 and the gear switch CB2 are sequentially connected in series and then connected with one end of the resistor R;
the connection point between the reactor L2 and the reactor L3 is connected with one end of a rear connection resistor R of a gear switch KM 2;
the other end of the resistor R is connected with an end-side connection point of the passive phase jump device;
The reactor L1 and the reactor L4 are respectively connected with a network side connection point of the passive phase jump device;
and a gear switch CB1 is connected between a network side connecting point of the passive phase jump device and an end side connecting point of the passive phase jump device.
Preferably, the gear of the passive phase jump device in the pre-built network-structured converter testing system is adjusted, so that the amplitude of each phase jump is within a preset range in the process of generating the preset number of phase jumps by the pre-built network-structured converter testing system.
Further, the preset number of times is 4, and the preset range is 10 ° to 60 °.
Further, the amplitude of the phase jump is as follows:
in the above, deltaθAs the magnitude of the phase jump,θ 0 、θ 1 the electric potentials in the converter before and after phase angle jump are respectively,R g 、X g the internal resistance and the internal reactance of the power grid are respectively,R t 、X t the equivalent resistance and the equivalent reactance of the passive phase jump generating device are respectively,X in 、X tr the internal reactance and the box-type variable reactance of the converter are respectively.
Further, the equivalent reactance of the passive phase jump generating device is as follows:
in the above description, L1, L2, L3, L4, L5, and L6 are inductance values of the reactor L1, the reactor L2, the reactor L3, the reactor L4, the reactor L5, and the reactor L6 in the passive phase jump device, ω is an angular frequency, and CB1, CB2, KM1, and KM2 are numbers of the gear switch in the passive phase jump generating device.
Further, the internal resistance and internal reactance of the power grid are as follows:
in the above-mentioned method, the step of,I 0 for the magnitude of the net side current before the phase angle jump,U g0 for the network side voltage before the phase angle jump,αis the network side phase angle difference before the phase angle jump.
Preferably, the measuring point comprises: and a network side measuring point between the passive phase jump device and the box-type transformer and an end side measuring point between the box-type transformer and the network-type transformer to be tested.
Preferably, the step of performing phase jump active response characteristic test evaluation on the to-be-tested grid-connected converter based on the power curve includes:
determining a phase jump active response characteristic index value of the to-be-detected network-structured converter based on the power curve;
if the phase jump active response characteristic index value of the to-be-tested network-structured converter meets a preset constraint condition, the phase jump active response capability of the to-be-tested network-structured converter is qualified, otherwise, the phase jump active response capability of the to-be-tested network-structured converter is not qualified.
Further, the phase jump active response characteristic index value of the to-be-detected network-structured converter comprises at least one of the following: phase change active control deviation, overshoot, response time and regulation time of the network-structured converter to be tested.
Further, the phase change active control deviation of the to-be-detected grid-connected converter is the difference between the theoretical extremum of the phase change active control and the extremum of the power curve;
the overshoot of the to-be-tested grid-built converter is the difference between the maximum value of the power curve and the active initial value of the to-be-tested grid-built converter;
the response time of the to-be-tested network-built converter is the time from the phase jump time to 90% of the time required for the phase change active adjustment quantity to reach the difference between the theoretical extremum of the phase change active control and the active initial value of the to-be-tested network-built converter;
the adjusting time of the to-be-measured grid-connected converter is the shortest time from the phase jump time to the active power fluctuation of the to-be-measured grid-connected converter which is not more than +/-1% of the rated output.
Further, the theoretical extremum of the phase change active control is as follows:
in the above-mentioned method, the step of,I ea 、I eb 、I ec amplitude, delta of box transformer excitation surge currents with a, b and c phases at extreme point momentP t1 As a theoretical extremum for phase change active control,E 1 for the potential in the converter after the phase angle jump,θ 0 、θ 1 the electric potentials in the converter before and after phase angle jump are respectively,U g1 as the magnitude of the network side voltage after the phase jump,R g is the internal resistance of the electric network,R t is the equivalent resistance of the passive phase jump generating device, X t Is the equivalent reactance of the passive phase jump generating means,X in 、X tr the internal reactance and the box-type variable reactance of the converter are respectively.
Further, the case-changing excitation inrush currents of the a, b and c phases are at the times corresponding to the maximum values of the case-changing magnetic fluxes of the a, b and c phases at the extreme point times, and the case-changing magnetic flux corresponding curve expressions of the a, b and c phases are as follows:
in the above, phi a 、Φ b 、Φ c Box-type variable magnetic flux with a, b and c phases respectively, phi SY For the remanence of the box transformer,βfor the phase angle jump magnitude,U g1m the amplitude of the network side voltage is ω is angular frequency, and t is the current time.
Further, the preset constraint condition includes at least one of the following: the phase change active control deviation of the to-be-tested grid-structured converter is not more than 10%, the overshoot of the to-be-tested grid-structured converter is not more than 20%, the response time of the to-be-tested grid-structured converter is not more than 20ms, and the adjustment time of the to-be-tested grid-structured converter is not more than 150ms.
Example 3
Based on the same inventive concept, the invention also provides a computer device comprising a processor and a memory for storing a computer program comprising program instructions, the processor for executing the program instructions stored by the computer storage medium. The processor may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application SpecificIntegrated Circuit, ASIC), off-the-shelf Programmable gate array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc., which are a computing core and a control core of the terminal adapted to implement one or more instructions, in particular to load and execute one or more instructions in a computer storage medium to implement the corresponding method flow or corresponding functions, to implement the steps of a network-structured converter phase jump active response characteristic test evaluation method in the above embodiments.
Example 4
Based on the same inventive concept, the present invention also provides a storage medium, in particular, a computer readable storage medium (Memory), which is a Memory device in a computer device, for storing programs and data. It is understood that the computer readable storage medium herein may include both built-in storage media in a computer device and extended storage media supported by the computer device. The computer-readable storage medium provides a storage space storing an operating system of the terminal. Also stored in the memory space are one or more instructions, which may be one or more computer programs (including program code), adapted to be loaded and executed by the processor. The computer readable storage medium herein may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. One or more instructions stored in a computer-readable storage medium may be loaded and executed by a processor to implement the steps of a method for evaluating a grid-tied converter phase jump active response characteristic test in the above-described embodiments.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (18)
1. A method for testing and evaluating phase jump active response characteristics of a network-structured converter is characterized by comprising the following steps:
setting the running state of the network-structured converter to be tested as a test state;
adjusting the gear of a passive phase jump device in a pre-built network-structured converter testing system so as to enable the pre-built network-structured converter testing system to generate phase jumps for preset times;
acquiring a power curve of a measuring point in the pre-constructed grid-constructed converter test system, and carrying out phase jump active response characteristic test evaluation on the to-be-tested grid-constructed converter based on the power curve;
the pre-constructed network-structured converter testing system comprises a passive phase jump device, a box-type transformer, a network-structured converter to be tested and an energy storage battery which are connected in sequence.
2. The method of claim 1, wherein setting the operating state of the grid-tied converter to be tested to the test state comprises:
setting the to-be-tested network-structured converter to work in a charging state or a discharging state, operating at 50% of rated capacity, setting reactive output to be zero, and closing all additional frequencies and active controls.
3. The method of claim 1, wherein the passive phase hopping means comprises: reactor L1, reactor L2, reactor L3, reactor L4, reactor L5, reactor L6, shift switch CB1, shift switch CB2, shift switch KM1, shift switch KM2, and resistor R;
the reactor L1, the reactor L2, the reactor L3 and the gear switch KM1 are sequentially connected in series and then connected with one end of a resistor R;
the reactor L4, the reactor L5, the reactor L6 and the gear switch CB2 are sequentially connected in series and then connected with one end of the resistor R;
the connection point between the reactor L2 and the reactor L3 is connected with one end of a rear connection resistor R of a gear switch KM 2;
the other end of the resistor R is connected with an end-side connection point of the passive phase jump device;
the reactor L1 and the reactor L4 are respectively connected with a network side connection point of the passive phase jump device;
and a gear switch CB1 is connected between a network side connecting point of the passive phase jump device and an end side connecting point of the passive phase jump device.
4. The method of claim 1, wherein the step of adjusting the passive phase jump device in the pre-built grid-connected converter test system is performed so that the amplitude of each phase jump is within a predetermined range during the process of generating a predetermined number of phase jumps in the pre-built grid-connected converter test system.
5. The method of claim 4, wherein the predetermined number of times is 4 and the predetermined range is 10 ° to 60 °.
6. The method of claim 4, wherein the amplitude of the phase jump is as follows:
in the above, deltaθAs the magnitude of the phase jump,θ 0 、θ 1 the electric potentials in the converter before and after phase angle jump are respectively,R g 、X g the internal resistance and the internal reactance of the power grid are respectively,R t 、X t the equivalent resistance and the equivalent reactance of the passive phase jump generating device are respectively,X in 、X tr the internal reactance and the box-type variable reactance of the converter are respectively.
7. The method of claim 6, wherein the equivalent reactance of the passive phase jump generating means is as follows:
in the above description, L1, L2, L3, L4, L5, and L6 are inductance values of the reactor L1, the reactor L2, the reactor L3, the reactor L4, the reactor L5, and the reactor L6 in the passive phase jump device, ω is an angular frequency, and CB1, CB2, KM1, and KM2 are numbers of the gear switch in the passive phase jump generating device.
8. The method of claim 6, wherein the internal resistance and internal reactance of the power grid are as follows:
in the above-mentioned method, the step of,I 0 for the magnitude of the net side current before the phase angle jump,U g0 for the network side voltage before the phase angle jump, αIs the network side phase angle difference before the phase angle jump.
9. The method of claim 1, wherein the station comprises: and a network side measuring point between the passive phase jump device and the box-type transformer and an end side measuring point between the box-type transformer and the network-type transformer to be tested.
10. The method of claim 1, wherein the performing a phase jump active response characteristic test evaluation on the grid-tied converter to be tested based on the power curve comprises:
determining a phase jump active response characteristic index value of the to-be-detected network-structured converter based on the power curve;
if the phase jump active response characteristic index value of the to-be-tested network-structured converter meets a preset constraint condition, the phase jump active response capability of the to-be-tested network-structured converter is qualified, otherwise, the phase jump active response capability of the to-be-tested network-structured converter is not qualified.
11. The method of claim 10, wherein the phase jump active response characteristic index value of the to-be-measured grid-connected converter comprises at least one of: phase change active control deviation, overshoot, response time and regulation time of the network-structured converter to be tested.
12. The method of claim 11, wherein the phase change active control deviation of the to-be-tested grid-connected converter is the difference between a theoretical extremum of phase change active control and an extremum of the power curve;
the overshoot of the to-be-tested grid-built converter is the difference between the maximum value of the power curve and the active initial value of the to-be-tested grid-built converter;
the response time of the to-be-tested network-built converter is the time from the phase jump time to 90% of the time required for the phase change active adjustment quantity to reach the difference between the theoretical extremum of the phase change active control and the active initial value of the to-be-tested network-built converter;
the adjusting time of the to-be-measured grid-connected converter is the shortest time from the phase jump time to the active power fluctuation of the to-be-measured grid-connected converter which is not more than +/-1% of the rated output.
13. The method of claim 12, wherein the theoretical extremum of phase change active control is as follows:
in the above-mentioned method, the step of,I ea 、I eb 、I ec amplitude, delta of box transformer excitation surge currents with a, b and c phases at extreme point momentP t1 As a theoretical extremum for phase change active control,E 1 for the potential in the converter after the phase angle jump,θ 0 、θ 1 the electric potentials in the converter before and after phase angle jump are respectively, U g1 As the magnitude of the network side voltage after the phase jump,R g is the internal resistance of the electric network,R t is the equivalent resistance of the passive phase jump generating device,X t is the equivalent reactance of the passive phase jump generating means,X in 、X tr the internal reactance and the box-type variable reactance of the converter are respectively.
14. The method of claim 13, wherein the a, b, c three-phase tank transformer excitation inrush current is at a time corresponding to a maximum value of a, b, c three-phase tank transformer magnetic flux at an extreme point time, and the a, b, c three-phase tank transformer magnetic flux corresponding curve expression is as follows:
in the above, phi a 、Φ b 、Φ c Box-type variable magnetic flux with a, b and c phases respectively, phi SY For the remanence of the box transformer,βfor the phase angle jump magnitude,U g1m the amplitude of the network side voltage is ω is angular frequency, and t is the current time.
15. The method of claim 11, wherein the preset constraints include at least one of: the phase change active control deviation of the to-be-tested grid-structured converter is not more than 10%, the overshoot of the to-be-tested grid-structured converter is not more than 20%, the response time of the to-be-tested grid-structured converter is not more than 20ms, and the adjustment time of the to-be-tested grid-structured converter is not more than 150ms.
16. An apparatus based on the method for evaluating a network-structured converter phase jump active response characteristic test according to any one of claims 1 to 15, characterized in that the apparatus comprises:
The setting module is used for setting the running state of the network construction type converter to be tested into a test state;
the adjusting module is used for adjusting the gear of the passive phase jump device in the pre-built network-structured converter testing system so as to enable the pre-built network-structured converter testing system to generate phase jumps for a preset number of times;
the testing module is used for acquiring a power curve of a measuring point in the pre-constructed network-structured converter testing system and carrying out phase jump active response characteristic test evaluation on the network-structured converter to be tested based on the power curve;
the pre-constructed network-structured converter testing system comprises a passive phase jump device, a box-type transformer, a network-structured converter to be tested and an energy storage battery which are connected in sequence.
17. A computer device, comprising: one or more processors;
the processor is used for storing one or more programs;
a method of evaluating a grid-built converter phase jump active response characteristic test as claimed in any one of claims 1 to 15 when said one or more programs are executed by said one or more processors.
18. A computer readable storage medium having stored thereon a computer program which, when executed, implements a method of evaluating a net-structured converter phase jump active response characteristic test as claimed in any one of claims 1 to 15.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018105683A1 (en) * | 2018-03-12 | 2019-09-12 | Woodward Kempen Gmbh | Method for operating an electronic circuit breaker of an inverter |
| CN115313524A (en) * | 2022-07-26 | 2022-11-08 | 中国电力科学研究院有限公司 | Photovoltaic power generation grid-connected control method and system based on network-building type converter |
| CN115313419A (en) * | 2022-07-26 | 2022-11-08 | 中国电力科学研究院有限公司 | Direct-drive wind power system control method and system based on network-building type converter |
| CN115473263A (en) * | 2022-08-25 | 2022-12-13 | 明阳智慧能源集团股份公司 | Voltage source characteristic testing device of network-structured type converter and testing and evaluating method thereof |
| CN115549167A (en) * | 2022-08-31 | 2022-12-30 | 国网智能电网研究院有限公司 | Transient stress suppression method and device for grid-structured converter |
| CN115656658A (en) * | 2022-09-30 | 2023-01-31 | 明阳智慧能源集团股份公司 | Network-based converter inertia response testing device and testing and evaluating method thereof |
| WO2023045469A1 (en) * | 2021-09-27 | 2023-03-30 | 新疆金风科技股份有限公司 | Power grid frequency detection method, apparatus, power grid frequency adjustment method, and apparatus |
| CN116094025A (en) * | 2022-09-07 | 2023-05-09 | 南瑞集团有限公司 | Transient stability analysis method for power system of converter with heel-net and grid-structured |
| CN116404691A (en) * | 2023-03-27 | 2023-07-07 | 清华大学 | Control parameter optimization method and optimization device for network-structured new energy power generation system |
-
2023
- 2023-11-17 CN CN202311532200.7A patent/CN117269654B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018105683A1 (en) * | 2018-03-12 | 2019-09-12 | Woodward Kempen Gmbh | Method for operating an electronic circuit breaker of an inverter |
| WO2023045469A1 (en) * | 2021-09-27 | 2023-03-30 | 新疆金风科技股份有限公司 | Power grid frequency detection method, apparatus, power grid frequency adjustment method, and apparatus |
| CN115313524A (en) * | 2022-07-26 | 2022-11-08 | 中国电力科学研究院有限公司 | Photovoltaic power generation grid-connected control method and system based on network-building type converter |
| CN115313419A (en) * | 2022-07-26 | 2022-11-08 | 中国电力科学研究院有限公司 | Direct-drive wind power system control method and system based on network-building type converter |
| CN115473263A (en) * | 2022-08-25 | 2022-12-13 | 明阳智慧能源集团股份公司 | Voltage source characteristic testing device of network-structured type converter and testing and evaluating method thereof |
| CN115549167A (en) * | 2022-08-31 | 2022-12-30 | 国网智能电网研究院有限公司 | Transient stress suppression method and device for grid-structured converter |
| CN116094025A (en) * | 2022-09-07 | 2023-05-09 | 南瑞集团有限公司 | Transient stability analysis method for power system of converter with heel-net and grid-structured |
| CN115656658A (en) * | 2022-09-30 | 2023-01-31 | 明阳智慧能源集团股份公司 | Network-based converter inertia response testing device and testing and evaluating method thereof |
| CN116404691A (en) * | 2023-03-27 | 2023-07-07 | 清华大学 | Control parameter optimization method and optimization device for network-structured new energy power generation system |
Non-Patent Citations (1)
| Title |
|---|
| 构网型变流器对交流***低频振荡的影响分析与阻尼控制;薛翼程 等;《电力***自动化》;第47卷(第16期);第103-113页 * |
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|---|---|
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