CN104459375A - Method for identifying transient electromagnetic disturbance of secondary device of gas insulation substation - Google Patents

Abstract

The invention discloses a method for identifying transient electromagnetic disturbances occurring in secondary equipment of a gas-insulated substation, which belongs to the field of electromagnetic compatibility of the secondary equipment of the substation. By collecting the electromagnetic waveform data caused by the switching operation of the secondary equipment of the substation, performing statistical analysis, extracting the waveform characteristic parameters measured and recorded on the secondary equipment of the UHV GIS substation, and comparing them with the defined waveform characteristic parameters, it is determined that it occurred during the measurement and recording period Transient electromagnetic disturbance; the present invention has carried out a large number of tests, carried out statistical analysis on the data, obtained typical waveform parameters, and can accurately judge the ultra-fast transient electromagnetic disturbance that occurs in the actual UHV substation; the monitoring of UHV secondary equipment It has important guiding significance for protection.

Description

Identification Method of Transient Electromagnetic Disturbance in Secondary Equipment of Gas Insulated Substation

technical field

The invention belongs to the field of electromagnetic compatibility of secondary equipment of a substation, in particular to a method for identifying transient electromagnetic disturbances of secondary equipment of a gas-insulated substation.

Background technique

The transient electromagnetic disturbance caused by the switching operation of GIS (gas insulated) substation has the characteristics of short rise time and wide frequency bandwidth, so it is also called ultra-fast transient electromagnetic disturbance. In the field of electromagnetic compatibility of substation secondary equipment, the threat of ultra-fast transient electromagnetic disturbance to secondary equipment is the most serious. my country's power grid has developed to the UHV stage. According to experience, the electromagnetic compatibility problem in higher voltage levels will be more severe. There is an urgent need to study the EMC problems of UHV GIS substations, especially to find out the waveform characteristics of UHV transient electromagnetic disturbances. However, the number of switching operations in the actual GIS substation is limited, so that the amount of data that can be obtained is limited, and the summarized waveform characteristics do not have a good representative meaning. In order to solve this problem, we conducted a large number of experiments on the UHV GIS real-type test platform, carried out statistical analysis on the data, obtained the typical waveform parameters, and proposed the waveform of ultra-fast transient electromagnetic disturbance of the secondary equipment of UHV GIS substation recognition methods. This has important guiding significance for the monitoring and protection of UHV secondary equipment.

Contents of the invention

The purpose of the present invention is to provide a method for identifying transient electromagnetic disturbances in gas-insulated substation secondary equipment. The waveform characteristic parameters measured and recorded on the secondary equipment of the substation are compared with the defined waveform characteristic parameters, so as to determine that transient electromagnetic disturbance has occurred during the measurement and recording; including the following steps:

1) Select a test UHV GIS full-scale true simulation test circuit with variable branch bus length, various types of isolating switch test products, multi-point synchronous measurement system and various test functions (as shown in Figure 1, the UHV GIS full-scale mock-up test loop);

2) A large number of tests are carried out on the UHV GIS full-scale true simulation test circuit, and waveform data are collected; the waveform of the transient electromagnetic disturbance of the secondary equipment of the GIS substation specifically includes the following characteristic parameters, and the waveform characteristic parameters are defined as follows: a .Macro pulse peak-to-peak value: the difference between the maximum value and the minimum value of the interference waveform; b. The maximum peak value of the macro pulse: the value with a larger absolute value than the maximum value and the minimum value in the interference waveform; c. Macro pulse duration: from the interference waveform The time from the first micropulse to the last micropulse; d. Number of micropulses: the number of all micropulses in the interference waveform; e. Micropulse interval time: the time difference between two adjacent micropulses; f .Micropulse duration: the time from the rising of the pulse waveform until it is basically submerged in the environmental noise; g. Micropulse rise time: the time from 10% to 90% of the maximum peak value of the micropulse; the above characteristic parameters can be unique Specify the transient electromagnetic disturbance waveform generated by the switching operation of the UHV GIS substation on the secondary equipment port;

3) Through the statistical analysis of the waveform data collected in step 2), extract the waveform characteristic parameters measured and recorded on the secondary equipment of the UHV GIS substation, if all parameters conform to the characteristics of the transient electromagnetic disturbance waveform described in step 2) parameters, it can be determined that transient electromagnetic disturbance occurred during the recording period.

The UHV GIS full-scale real simulation test circuit is completely arranged according to the secondary system wiring mode of the actual GIS substation, and the obtained waveform data is representative.

The transient electromagnetic disturbance caused by the actual GIS substation switching operation on the secondary equipment of the high-voltage GIS substation is divided into closing common mode disturbance, opening common mode disturbance, and closing differential mode disturbance due to different operation types and different propagation paths. There are four types of differential mode disturbance and opening differential mode, and their parameter values are quite different.

The typical characteristic parameter values of the closing common mode disturbance are: the duration of the macropulse is 116ms, the number of micropulse of 8kV is 2, the interval time of the micropulse is 4.6ms, the duration of the micropulse is 5.8us, and the rise time of the micropulse is 43.8ns; 4kV micropulse number is 2, micropulse interval time is 3.1ms, micropulse duration is 4.7us, micropulse rise time is 47.8ns; 2kV micropulse number is 4, micropulse interval time is 1.8ms, the micropulse duration is 3.5us, the micropulse rise time is 43.7ns; the number of 1kV micropulse is 8, the micropulse interval time is 0.7ms, the micropulse duration is 2.5us, and the micropulse rise time is 44.1 ns; the number of 0.5kV micropulses is 232, the micropulse interval time is 0.4ms, the micropulse duration is 1.7us, and the micropulse rise time is 38.2ns. The burst interval time of different disturbance voltage levels is as follows: the interval between 8kV microburst and 4kV microburst is 5.5ms; the interval between 4kV microburst and 2kV microburst is 4.0ms; the interval between 2kV microburst and 1kV microburst The interval time is 3.5ms; the interval time between 1kV microburst and 0.5kV microburst is 1.7ms.

The typical characteristic parameter values of the common mode disturbance of the gate opening are: the macro pulse duration is 227ms, the number of 8kV micro pulses is 2, the micro pulse interval time is 9.7ms, the micro pulse duration is 8.5us, and the micro pulse rise time is 53.2ns; 4kV micropulse number is 3, micropulse interval time is 4.7ms, micropulse duration is 5.5us, micropulse rise time is 45.9ns; 2kV micropulse number is 7, micropulse interval time is 1.8ms, the micropulse duration is 3.9us, the micropulse rise time is 45.2ns; the number of 1kV micropulse is 12, the micropulse interval time is 1.5ms, the micropulse duration is 2.8us, and the micropulse rise time is 48.4 ns; the number of 0.5kV micropulses is 399, the micropulse interval time is 0.4ms, the micropulse duration is 1.9us, and the micropulse rise time is 48.1ns.

The typical characteristic parameter values of the closing differential mode disturbance are: macro pulse duration 133ms, number of 0.5kV micro pulses is 76, micro pulse interval time is 2.6ms, micro pulse duration is 0.6us, micro pulse rise time 18.4ns.

The typical characteristic parameters of the gate opening differential mode disturbance are: macro pulse duration 345ms, number of 0.5kV micro pulses is 79, micro pulse interval time is 6.4ms, micro pulse duration is 1.0us, micro pulse rise time 33.5ns.

The burst intervals of different disturbance voltage levels are as follows: the interval between 8kV microburst and 4kV microburst is 11.9ms; the interval between 4kV microburst and 2kV microburst is 7.4ms; the interval between 2kV microburst and 1kV microburst The burst interval is 4.7ms; the interval between 1kV microburst and 0.5kV microburst is 3.2ms.

The beneficial effect of the present invention is that the present invention has carried out a large number of tests on the UHV GIS real-type test platform, carried out statistical analysis on the data, obtained typical waveform parameters, and can accurately judge the ultra-fast transient electromagnetic disturbance that occurs in the actual UHV substation ; The waveform recognition method for the ultra-fast transient electromagnetic disturbance of the secondary equipment of the UHV GIS substation has important guiding significance for the monitoring and protection of the UHV secondary equipment.

Description of drawings

Figure 1 is a full-scale true simulation test circuit of UHV GIS.

Figure 2 is a schematic diagram of a typical closing common-mode disturbance waveform.

Fig. 3 is a schematic diagram of a waveform of a typical common-mode disturbance of a gate opening.

Fig. 4 is a schematic diagram of a typical closing differential-mode disturbance waveform.

Fig. 5 is a schematic diagram of a waveform of a typical gate opening differential mode disturbance.

Detailed ways

The invention provides a method for identifying transient electromagnetic disturbances in secondary equipment of a gas-insulated substation, which will be described below in conjunction with the accompanying drawings.

The identification method for the transient electromagnetic disturbance in the UHV GIS is to collect the electromagnetic waveform data caused by the switching operation of the secondary equipment of the substation, perform statistical analysis, and extract the waveform characteristic parameters measured and recorded on the secondary equipment of the UHV GIS substation. Define the comparison of waveform characteristic parameters, so as to determine that transient electromagnetic disturbance has occurred during the recording period; including the following steps:

1) Select a test UHV GIS full-scale true simulation test circuit with variable branch bus length, various types of isolating switch test products, multi-point synchronous measurement system and various test functions (as shown in Figure 1, the UHV GIS full-scale mock-up test loop);

2) A large number of tests are carried out on the UHV GIS full-scale true simulation test circuit, and waveform data are collected; the waveform of the transient electromagnetic disturbance of the secondary equipment of the GIS substation specifically includes the following characteristic parameters, and the waveform characteristic parameters are defined as follows: a .Macro pulse peak-to-peak value: the difference between the maximum value and the minimum value of the interference waveform; b. The maximum peak value of the macro pulse: the value with a larger absolute value than the maximum value and the minimum value in the interference waveform; c. Macro pulse duration: from the interference waveform The time from the first micropulse to the last micropulse; d. Number of micropulses: the number of all micropulses in the interference waveform; e. Micropulse interval time: the time difference between two adjacent micropulses; f .Micropulse duration: the time from the rising of the pulse waveform until it is basically submerged in the environmental noise; g. Micropulse rise time: the time from 10% to 90% of the maximum peak value of the micropulse; the above characteristic parameters can be unique Specify the transient electromagnetic disturbance waveform generated by the switching operation of the UHV GIS substation on the secondary equipment port;

3) By performing statistical analysis on the waveform data collected in step 2), extract the waveform characteristic parameters measured and recorded on the secondary equipment of the UHV GIS substation, if all parameters are consistent with the characteristics of the transient electromagnetic disturbance waveform described in step 2) parameters, it can be determined that transient electromagnetic disturbance occurred during the recording period.

The UHV GIS full-scale real simulation test circuit is completely arranged according to the secondary system wiring mode of the actual GIS substation, and the obtained waveform data is representative.

The transient electromagnetic disturbance caused by the actual GIS substation switching operation on the secondary equipment of the high-voltage GIS substation is divided into closing common mode disturbance, opening common mode disturbance, and closing differential mode disturbance due to different operation types and different propagation paths. There are four types of differential mode disturbance and opening differential mode, and their parameter values are quite different.

Figure 2 is a schematic diagram of the typical closing common-mode disturbance waveform. The typical characteristic parameters of the closing common-mode disturbance are: the macro pulse duration is 116ms, the number of 8kV micro-pulses is 2, and the micro-pulse interval is 4.6ms , the micropulse duration is 5.8us, the micropulse rise time is 43.8ns; the number of 4kV micropulse is 2, the micropulse interval time is 3.1ms, the micropulse duration is 4.7us, and the micropulse rise time is 47.8ns; The number of micropulses of 2kV is 4, the interval time of micropulses is 1.8ms, the duration of micropulses is 3.5us, and the rise time of micropulses is 43.7ns; the number of micropulses of 1kV is 8, and the interval time of micropulses is 0.7ms. The micropulse duration is 2.5us, the micropulse rise time is 44.1ns; the number of 0.5kV micropulse is 232, the micropulse interval time is 0.4ms, the micropulse duration is 1.7us, and the micropulse rise time is 38.2ns. The burst interval time of different disturbance voltage levels is as follows: the interval between 8kV microburst and 4kV microburst is 5.5ms; the interval between 4kV microburst and 2kV microburst is 4.0ms; the interval between 2kV microburst and 1kV microburst The interval time is 3.5ms; the interval time between 1kV microburst and 0.5kV microburst is 1.7ms.

Figure 3 is a schematic diagram of the waveform of a typical common-mode disturbance of the gate opening. The typical characteristic parameters of the common-mode disturbance of the gate-opening are: the duration of the macro pulse is 227ms, the number of 8kV micro pulses is 2, and the interval time of the micro pulses is 9.7ms , the micropulse duration is 8.5us, the micropulse rise time is 53.2ns; the number of 4kV micropulse is 3, the micropulse interval time is 4.7ms, the micropulse duration is 5.5us, and the micropulse rise time is 45.9ns; The number of micropulses of 2kV is 7, the interval time of micropulses is 1.8ms, the duration of micropulses is 3.9us, and the rise time of micropulses is 45.2ns; the number of micropulses of 1kV is 12, and the interval time of micropulses is 1.5ms. The micropulse duration is 2.8us, the micropulse rise time is 48.4ns; the number of 0.5kV micropulse is 399, the micropulse interval time is 0.4ms, the micropulse duration is 1.9us, and the micropulse rise time is 48.1ns.

Figure 4 is a schematic diagram of the waveform of typical closing differential mode disturbance. The typical characteristic parameters of closing differential mode disturbance are: macro pulse duration 133ms, number of 0.5kV micro pulses is 76, micro pulse interval time is 2.6 ms, the micropulse duration is 0.6us, and the micropulse rise time is 18.4ns.

Figure 5 is a schematic diagram of the waveform of a typical opening differential mode disturbance. The typical characteristic parameters of the opening differential mode disturbance are: the duration of the macro pulse is 345ms, the number of 0.5kV micro pulses is 79, and the interval time of the micro pulses is 6.4 ms, the micropulse duration is 1.0us, and the micropulse rise time is 33.5ns.

The burst intervals of different disturbance voltage levels are as follows: the interval between 8kV microburst and 4kV microburst is 11.9ms; the interval between 4kV microburst and 2kV microburst is 7.4ms; the interval between 2kV microburst and 1kV microburst The burst interval is 4.7ms; the interval between 1kV microburst and 0.5kV microburst is 3.2ms.

The invention carries out a large number of tests on the UHV GIS real-type test platform, performs statistical analysis on the data, obtains typical waveform parameters, and can accurately judge the ultra-fast transient electromagnetic disturbance that occurs in the actual UHV substation.

Claims (7)

1. A method for identifying transient electromagnetic disturbances in secondary equipment of gas-insulated substations, characterized in that, by collecting electromagnetic waveform data caused by switching operations of secondary equipment in UHV gas-insulated substations, statistical analysis is performed to extract gas-insulated substations The waveform characteristic parameters measured and recorded on the secondary equipment are compared with the defined waveform characteristic parameters, so as to determine that transient electromagnetic disturbance has occurred during the measurement and recording period; including the following steps: 1) Select a test UHV GIS full-scale true simulation test circuit with variable branch bus length, various types of isolating switch test products, multi-point synchronous measurement system and various test functions (as shown in Figure 1, the UHV GIS full-scale mock-up test loop); 2) A large number of tests are carried out on the UHV GIS full-scale true simulation test circuit, and waveform data are collected; the waveform of the transient electromagnetic disturbance of the secondary equipment of the GIS substation specifically includes the following characteristic parameters, and the waveform characteristic parameters are defined as follows: a .Macro pulse peak-to-peak value: the difference between the maximum value and the minimum value of the interference waveform; b. The maximum peak value of the macro pulse: the value with a larger absolute value than the maximum value and the minimum value in the interference waveform; c. Macro pulse duration: from the interference waveform The time from the first micropulse to the last micropulse; d. Number of micropulses: the number of all micropulses in the interference waveform; e. Micropulse interval time: the time difference between two adjacent micropulses; f .Micropulse duration: the time from the rising of the pulse waveform until it is basically submerged in the environmental noise; g. Micropulse rise time: the time from 10% to 90% of the maximum peak value of the micropulse; the above characteristic parameters can be unique Specify the transient electromagnetic disturbance waveform generated by the switching operation of the UHV GIS substation on the secondary equipment port; 3) By performing statistical analysis on the waveform data collected in step 2), extract the waveform characteristic parameters measured and recorded on the secondary equipment of the UHV GIS substation, if all parameters are consistent with the characteristics of the transient electromagnetic disturbance waveform described in step 2) parameters, it can be determined that transient electromagnetic disturbance occurred during the recording period. 2. The method for identifying transient electromagnetic disturbances occurring in secondary equipment of gas-insulated substations according to claim 1, wherein the UHV GIS full-scale true-type simulation test circuit is completely in accordance with the actual GIS substation secondary system wiring method arrangement, the obtained waveform data are representative. 3. The identification method for transient electromagnetic disturbances occurring in the secondary equipment of the gas-insulated substation according to claim 1, characterized in that the transient electromagnetic disturbances caused by the actual GIS substation switch operation on the secondary equipment of the high-voltage GIS substation are due to different The operation type and different propagation paths are divided into four types: closing common mode disturbance, opening common mode disturbance, closing differential mode disturbance and opening differential mode disturbance, and their parameter values are quite different. 4. The method for identifying transient electromagnetic disturbances occurring in secondary equipment of gas-insulated substations according to claim 3, characterized in that, the typical characteristic parameter values of the closing common-mode disturbances are: macro pulse duration 116 ms, micro pulse of 8 kV The number of pulses is 2, the interval time of micropulse is 4.6ms, the duration of micropulse is 5.8us, the rise time of micropulse is 43.8ns; the number of micropulse of 4kV is 2, the interval time of micropulse is 3.1ms, and the duration of micropulse is The time is 4.7us, the micropulse rise time is 47.8ns; the number of 2kV micropulse is 4, the micropulse interval time is 1.8ms, the micropulse duration is 3.5us, and the micropulse rise time is 43.7ns; the 1kV micropulse The number of micropulses is 8, the interval time of micropulses is 0.7ms, the duration of micropulses is 2.5us, and the rise time of micropulses is 44.1ns; the number of 0.5kV micropulses is 232, the interval time of micropulses is 0.4ms, and the duration The time is 1.7us, and the rise time of micropulse is 38.2ns; among them, the interval time of bursts of different disturbance voltage levels is as follows: the interval between 8kV microburst and 4kV microburst is 5.5ms; the interval between 4kV microburst and 2kV microburst The interval time is 4.0ms; the interval time between 2kV microburst and 1kV microburst is 3.5ms; the interval between 1kV microburst and 0.5kV microburst is 1.7ms. 5. The method for identifying transient electromagnetic disturbances occurring in secondary equipment of gas-insulated substations according to claim 3, characterized in that, the typical characteristic parameter values of the common-mode disturbances of the gate opening are: macro pulse duration 227 ms, micro pulse of 8 kV The number of pulses is 2, the interval between micropulses is 9.7ms, the duration of micropulses is 8.5us, and the rise time of micropulses is 53.2ns; The time is 5.5us, the micropulse rise time is 45.9ns; the number of 2kV micropulse is 7, the micropulse interval time is 1.8ms, the micropulse duration is 3.9us, the micropulse rise time is 45.2ns; the 1kV micropulse The number of micropulses is 12, the interval time of micropulses is 1.5ms, the duration of micropulses is 2.8us, and the rise time of micropulses is 48.4ns; the number of micropulses of 0.5kV is 399, the interval time of micropulses is 0.4ms, and the duration The time is 1.9us, and the micropulse rise time is 48.1ns. 6. The method for identifying transient electromagnetic disturbances occurring in secondary equipment of gas-insulated substations according to claim 3, wherein the typical characteristic parameter values of the closing differential mode disturbances are: macro pulse duration 133ms, 0.5kV The number of micropulses is 76, the interval time of micropulses is 2.6ms, the duration of micropulses is 0.6us, and the rise time of micropulses is 18.4ns; among them, the interval time of bursts of different disturbance voltage levels is as follows: 8kV microbursts and 4kV The interval between microbursts is 11.9ms; the interval between 4kV microbursts and 2kV microbursts is 7.4ms; the interval between 2kV microbursts and 1kV microbursts is 4.7ms; the interval between 1kV microbursts and 0.5kV microbursts The time is 3.2ms. 7. The method for identifying transient electromagnetic disturbances occurring in secondary equipment of gas-insulated substations according to claim 3, characterized in that, the typical characteristic parameter values of the differential-mode disturbances of the gate opening are: macro pulse duration 345ms, 0.5kV The number of micropulses is 79, the interval time of micropulses is 6.4ms, the duration of micropulses is 1.0us, and the rise time of micropulses is 33.5ns.