CN113092891A - Detection method for unit high-low penetration response based on high-speed communication network monitoring - Google Patents
Detection method for unit high-low penetration response based on high-speed communication network monitoring Download PDFInfo
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- CN113092891A CN113092891A CN202110235824.7A CN202110235824A CN113092891A CN 113092891 A CN113092891 A CN 113092891A CN 202110235824 A CN202110235824 A CN 202110235824A CN 113092891 A CN113092891 A CN 113092891A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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Abstract
The invention discloses a detection method of unit high-low penetration response based on high-speed communication network monitoring, which comprises the following steps of adjusting a grid-connected monitoring device to a monitoring mode, monitoring the voltage and the power of a grid-connected point in real time by the grid-connected monitoring device, not issuing any command when the grid normally operates, and issuing a high-low penetration command to a single machine by the grid-connected monitoring device through a high-speed communication network when the grid is abnormal; adjusting the monitoring equipment of the grid-connected point to a monitoring mode, wherein the monitoring equipment of the grid-connected point artificially creates various high-low wearing working conditions by adjusting the output of the signal generating equipment; after various high-low penetration working conditions are artificially manufactured, the grid-connected point monitoring equipment sends high-low penetration commands to a single machine through a high-speed communication network, monitors the voltage of a power grid and the power of the grid-connected point, and determines the high-low penetration response time and the lag time of the new energy station. The high-low penetration response of the whole unit is quickly detected, and the corresponding effect of the new energy station is reflected.
Description
Technical Field
The invention relates to the technical field of grid-connected point detection, in particular to a method for detecting unit high-low penetration response based on high-speed communication network monitoring.
Background
In the prior art scheme, the voltage of a single machine monitoring single machine grid-connected point is adopted in the new energy power station, in the prior art scheme, the voltage of a medium voltage side is actively improved or reduced through a high-low penetration detection device on the medium voltage side of the single machine, so that the single machine can complete high-low penetration response according to the current voltage to detect the response effect, but the detection can only be performed on a single new energy single machine, and the high-low penetration response of a whole-field machine set cannot be rapidly detected, so that a detection method of the high-low penetration response of the machine set based on high-speed communication network monitoring is provided for solving the problems.
Disclosure of Invention
The invention aims to provide a method for detecting high-low penetration response of a unit based on high-speed communication network monitoring, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the detection method of the high-low penetration response of the unit based on the high-speed communication network monitoring comprises the following steps:
s1, adjusting the monitoring equipment of the grid-connected point to a monitoring mode, monitoring the voltage and the power of the grid-connected point in real time by the monitoring equipment of the grid-connected point, and when the grid runs normally, not issuing any command, and when the grid is abnormal, issuing a high-low penetration command to a single machine by the monitoring equipment of the grid-connected point through a high-speed communication network;
s2, adjusting the monitoring equipment of the grid-connected point to a monitoring mode, wherein the monitoring equipment of the grid-connected point artificially creates various high-low wearing conditions by adjusting the output of the signal generating equipment;
s3, after various high-low penetration working conditions are manufactured artificially, the grid-connected point monitoring equipment issues high-low penetration commands to a single machine through a high-speed communication network, monitors the voltage of a power grid and the power of the grid-connected point, and determines the high-low penetration response time and the lag time of the new energy station.
In an embodiment of the invention, one end of the grid-connected monitoring equipment is connected with a new energy single machine through a high-speed communication network, the signal generating equipment is connected with a power grid, a change-over switch is installed at the other end of the grid-connected monitoring equipment, the change-over switch of the grid-connected monitoring equipment is connected with the power grid to monitor normal operation, the change-over switch of the grid-connected monitoring equipment is in a detection mode when being switched and connected to the signal generating equipment, and various high-low wearing conditions are artificially produced by adjusting the output of the signal generating equipment.
In an embodiment, one end of the monitoring equipment of the grid-connected point is connected with the new energy single machine through a high-speed communication network, the signal generating equipment is connected with the power grid, the other end of the monitoring equipment of the grid-connected point is respectively connected with the power grid and the signal generating equipment through two connecting ports, when the monitoring equipment of the grid-connected point is in a normal operation monitoring mode, the data of the power grid are directly monitored, and when detection is carried out, an adjusting signal is directly sent through a port connected with the signal generating equipment, so that the output of the signal generating equipment is controlled and various high-low wearing conditions are artificially manufactured.
In a preferred embodiment, in step S2, the adjustment signal generating device outputs a signal that is one of a voltage signal with a step frequency, a voltage signal with a step amplitude, or a voltage signal with a frequency disturbance.
In a preferred embodiment, the frequency step period of the voltage signal with the frequency step is 20s, and the frequency step value is 50.21Hz or 49.80 Hz.
In a preferred embodiment, the amplitude step of the voltage signal of the amplitude step has a step amplitude of 25%, 35%, 40%, 45%, -20%, -30%, -40% or-50%, and the phase difference of the voltage signal of the amplitude step at the start of the amplitude step and the phase difference at the end of the amplitude step is 60-80 °.
In a preferred embodiment, the voltage signal of the frequency disturbance is a preset voltage of the power grid at each time of the frequency disturbance occurring in the historical period.
In a preferred embodiment, in step S3, the method for determining the high-low through response time and the lag time of the new energy station includes: taking the difference value between the starting moment of the test signal sent by the signal generating equipment and the moment when the active power in the active power signal of the grid-connected point of the new energy station changes to a preset observation value as the high-low penetration response time of the new energy station; and taking the difference value between the starting moment in the test signal sent by the signal generating equipment and the moment when the active power in the active power signal of the grid-connected point of the new energy station starts to change as the high-low penetration response lag time of the new energy station.
Compared with the prior art, the invention has the beneficial effects that: when the power grid is abnormal, the grid-connected monitoring equipment is connected with the signal generating equipment, various high-low penetration working conditions are artificially produced by adjusting the output of the signal generating equipment, the grid-connected monitoring equipment transmits the high-low penetration command to the new energy single machine, the high-low penetration response of the whole plant unit is rapidly detected, the high-low penetration response time and the lag time of the new energy station are fed back, and the corresponding effect of the new energy station is reflected.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the present invention provides a technical solution: the detection method of the high-low penetration response of the unit based on the high-speed communication network monitoring comprises the following steps:
s1, adjusting the monitoring equipment of the grid-connected point to a monitoring mode, monitoring the voltage and the power of the grid-connected point in real time by the monitoring equipment of the grid-connected point, and when the grid runs normally, not issuing any command, and when the grid is abnormal, issuing a high-low penetration command to a single machine by the monitoring equipment of the grid-connected point through a high-speed communication network;
s2, adjusting the monitoring equipment of the grid-connected point to a monitoring mode, wherein the monitoring equipment of the grid-connected point artificially creates various high-low wearing conditions by adjusting the output of the signal generating equipment;
s3, after various high-low penetration working conditions are manufactured artificially, the grid-connected point monitoring equipment issues high-low penetration commands to a single machine through a high-speed communication network, monitors the voltage of a power grid and the power of the grid-connected point, and determines the high-low penetration response time and the lag time of the new energy station.
Furthermore, one end of the grid-connected monitoring equipment is connected with a new energy single machine through a high-speed communication network, the signal generating equipment is connected with a power grid, a change-over switch is installed at the other end of the grid-connected monitoring equipment, normal operation monitoring is carried out when the change-over switch of the grid-connected monitoring equipment is connected with the power grid, the change-over switch of the grid-connected monitoring equipment is in a detection mode when being switched and connected to the signal generating equipment, various high-low wearing working conditions are artificially produced by adjusting the output of the signal generating equipment, as shown in fig. 1, when the change-over switch is switched to the first, the grid-connected monitoring equipment is directly connected with an actual power grid to carry out normal operation monitoring, when the change-over switch is switched to the second, the signal generating equipment is connected.
In an alternative embodiment, in step S2, the signal output by the adjustment signal generating device is one of a voltage signal with a frequency step, a voltage signal with an amplitude step, or a voltage signal with a frequency disturbance.
In a preferred embodiment, the frequency step period of the voltage signal with the frequency step is 20s, and the frequency step value is 50.21Hz or 49.80 Hz.
In a preferred embodiment, the amplitude step of the voltage signal of amplitude step is 25%, 35%, 40%, 45%, -20%, -30%, -40% or-50%, and the phase difference of the voltage signal of amplitude step at the start of the amplitude step and the phase difference at the end of the amplitude step is 60-80 °.
In a preferred embodiment, the voltage signal of the frequency disturbance is a preset voltage of the power grid at each moment of the frequency disturbance occurring in the historical period.
In a preferred embodiment, in step S3, the method for determining the high-low through response time and the lag time of the new energy station includes: taking the difference value between the starting moment of the test signal sent by the signal generating equipment and the moment when the active power in the active power signal of the grid-connected point of the new energy station changes to a preset observation value as the high-low penetration response time of the new energy station; and taking the difference value between the starting moment in the test signal sent by the signal generating equipment and the moment when the active power in the active power signal of the grid-connected point of the new energy station starts to change as the high-low penetration response lag time of the new energy station.
Example 2
Referring to fig. 2, the present invention provides a technical solution: the detection method of the high-low penetration response of the unit based on the high-speed communication network monitoring comprises the following steps:
s1, adjusting the monitoring equipment of the grid-connected point to a monitoring mode, monitoring the voltage and the power of the grid-connected point in real time by the monitoring equipment of the grid-connected point, and when the grid runs normally, not issuing any command, and when the grid is abnormal, issuing a high-low penetration command to a single machine by the monitoring equipment of the grid-connected point through a high-speed communication network;
s2, adjusting the monitoring equipment of the grid-connected point to a monitoring mode, wherein the monitoring equipment of the grid-connected point artificially creates various high-low wearing conditions by adjusting the output of the signal generating equipment;
s3, after various high-low penetration working conditions are manufactured artificially, the grid-connected point monitoring equipment issues high-low penetration commands to a single machine through a high-speed communication network, monitors the voltage of a power grid and the power of the grid-connected point, and determines the high-low penetration response time and the lag time of the new energy station.
Furthermore, one end of the monitoring equipment of the grid-connected point is connected with the new energy single machine through a high-speed communication network, the signal generating equipment is connected with a power grid, the other end of the grid-connected monitoring equipment is respectively connected with the power grid and the signal generating equipment through two connecting ports, when the monitoring equipment of the grid-connected point is in a normal operation monitoring mode, the data of the power grid is directly monitored, when the monitoring equipment of the grid-connected point detects the data, the adjusting signal is directly sent through a port connected with the signal generating equipment, thereby controlling and adjusting the output of the signal generating equipment and artificially producing various high and low wearing conditions, as shown in figure 2, the monitoring equipment of the grid-connected point is provided with an operation port and a detection port, the operation port directly monitors the power grid data when in normal operation, the detection port is not communicated, when in a detection mode, the operation port is disconnected and the connection of the ports is detected, and the quick switching is realized through the automatic control of an internal circuit of the monitoring equipment of the grid-connected point.
In a preferred embodiment, in step S2, the signal output by the adjustment signal generating device is one of a voltage signal with a frequency step, a voltage signal with an amplitude step, or a voltage signal with a frequency disturbance.
In a preferred embodiment, the frequency step period of the voltage signal with the frequency step is 20s, and the frequency step value is 50.21Hz or 49.80 Hz.
In a preferred embodiment, the amplitude step of the voltage signal of amplitude step is 25%, 35%, 40%, 45%, -20%, -30%, -40% or-50%, and the phase difference of the voltage signal of amplitude step at the start of the amplitude step and the phase difference at the end of the amplitude step is 60-80 °.
In a preferred embodiment, the voltage signal of the frequency disturbance is a preset voltage of the power grid at each moment of the frequency disturbance occurring in the historical period.
In a preferred embodiment, in step S3, the method for determining the high-low through response time and the lag time of the new energy station includes: taking the difference value between the starting moment of the test signal sent by the signal generating equipment and the moment when the active power in the active power signal of the grid-connected point of the new energy station changes to a preset observation value as the high-low penetration response time of the new energy station; and taking the difference value between the starting moment in the test signal sent by the signal generating equipment and the moment when the active power in the active power signal of the grid-connected point of the new energy station starts to change as the high-low penetration response lag time of the new energy station.
In summary, during normal operation, the grid-connected monitoring device monitors the operation port data, when the power grid is in normal operation, no command is issued, when the power grid is abnormal, a high-low penetration command is issued to the single machine, in the detection mode, the grid-connected monitoring device is connected with the signal generating device, various high-low penetration working conditions are artificially produced by adjusting the output of the signal generating device, the high-low penetration command is issued to the new energy source by the grid-connected monitoring device, the high-low penetration response of the whole plant unit is rapidly detected, the high-low penetration response time and the lag time of the new energy source station are fed back, and the corresponding effect of the new energy source station is reflected.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The method for detecting the high-low penetration response of the unit based on the high-speed communication network monitoring is characterized by comprising the following steps of:
s1, adjusting the monitoring equipment of the grid-connected point to a monitoring mode, monitoring the voltage and the power of the grid-connected point in real time by the monitoring equipment of the grid-connected point, and when the grid runs normally, not issuing any command, and when the grid is abnormal, issuing a high-low penetration command to a single machine by the monitoring equipment of the grid-connected point through a high-speed communication network;
s2, adjusting the monitoring equipment of the grid-connected point to a monitoring mode, wherein the monitoring equipment of the grid-connected point artificially creates various high-low wearing conditions by adjusting the output of the signal generating equipment;
s3, after various high-low penetration working conditions are manufactured artificially, the grid-connected point monitoring equipment issues high-low penetration commands to a single machine through a high-speed communication network, monitors the voltage of a power grid and the power of the grid-connected point, and determines the high-low penetration response time and the lag time of the new energy station.
2. The method for detecting the high-speed communication network monitoring-based unit high-low penetration response according to claim 1, wherein the method comprises the following steps: one end of the grid-connected monitoring equipment is connected with a new energy single machine through a high-speed communication network, the signal generating equipment is connected with a power grid, a change-over switch is installed at the other end of the grid-connected monitoring equipment, normal operation monitoring is carried out when the change-over switch of the grid-connected monitoring equipment is connected with the power grid, the change-over switch of the grid-connected monitoring equipment is in a detection mode when being switched and connected to the signal generating equipment, and various high-low wearing working conditions are artificially manufactured by adjusting the output of the signal generating equipment.
3. The method for detecting the high-speed communication network monitoring-based unit high-low penetration response according to claim 1, wherein the method comprises the following steps: one end of the grid-connected monitoring equipment is connected with a new energy single machine through a high-speed communication network, the signal generating equipment is connected with a power grid, the other end of the grid-connected monitoring equipment is respectively connected with the power grid and the signal generating equipment through two connecting ports, when the grid-connected monitoring equipment is in a normal operation monitoring mode, power grid data are directly monitored, and when detection is carried out, an adjusting signal is directly sent through a port connected with the signal generating equipment, so that the output of the signal generating equipment is controlled and adjusted, and various high-low wearing working conditions are artificially manufactured.
4. The method for detecting the high-speed communication network monitoring-based unit high-low penetration response according to claim 1, wherein the method comprises the following steps: in step S2, the signal output by the adjustment signal generating device is one of a voltage signal with a frequency step, a voltage signal with an amplitude step, or a voltage signal with a frequency disturbance.
5. The method for detecting the high-speed communication network monitoring-based unit high-low penetration response according to claim 4, wherein the method comprises the following steps: the frequency step period of the voltage signal with the frequency step is 20s, and the frequency step value is 50.21Hz or 49.80 Hz.
6. The method for detecting the high-speed communication network monitoring-based unit high-low penetration response according to claim 4, wherein the method comprises the following steps: the amplitude step amplitude of the voltage signal with the amplitude step is 25%, 35%, 40%, 45%, -20%, -30%, -40% or-50%, and the phase difference of the voltage signal with the amplitude step at the starting moment of the amplitude step and the phase difference of the voltage signal with the amplitude step at the ending moment of the amplitude step are 60-80 degrees.
7. The method for detecting the high-speed communication network monitoring-based unit high-low penetration response according to claim 4, wherein the method comprises the following steps: the voltage signal of the frequency disturbance is the preset voltage of the power grid at each moment when the frequency disturbance occurs in the historical period.
8. The method for detecting the high-speed communication network monitoring-based unit high-low penetration response according to claim 1, wherein the method comprises the following steps: in step S3, the method for determining the high-low penetration response time and the lag time of the new energy station includes: taking the difference value between the starting moment of the test signal sent by the signal generating equipment and the moment when the active power in the active power signal of the grid-connected point of the new energy station changes to a preset observation value as the high-low penetration response time of the new energy station; and taking the difference value between the starting moment in the test signal sent by the signal generating equipment and the moment when the active power in the active power signal of the grid-connected point of the new energy station starts to change as the high-low penetration response lag time of the new energy station.
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| CN112217240A (en) * | 2019-07-09 | 2021-01-12 | 中国电力科学研究院有限公司 | New energy power station frequency modulation system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108521130A (en) * | 2018-03-16 | 2018-09-11 | 国网浙江省电力有限公司电力科学研究院 | A kind of inverter powerless control method based on virtual synchronous mechanism |
| CN112217240A (en) * | 2019-07-09 | 2021-01-12 | 中国电力科学研究院有限公司 | New energy power station frequency modulation system and method |
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