CN103439564B - A kind of double pole direct current transmission system direct current voltage sampling fault detection method and device - Google Patents
A kind of double pole direct current transmission system direct current voltage sampling fault detection method and device Download PDFInfo
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- CN103439564B CN103439564B CN201310390044.5A CN201310390044A CN103439564B CN 103439564 B CN103439564 B CN 103439564B CN 201310390044 A CN201310390044 A CN 201310390044A CN 103439564 B CN103439564 B CN 103439564B
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Abstract
The present invention relates to technical field of double-pole, particularly a kind of double pole direct current transmission system direct current voltage sampling fault detection method and device.Detection method comprises: the theoretical absolute value of DC voltage calculating a converting plant wherein pole; If the DC voltage sampling absolute value that the theoretical absolute value of DC voltage of a converting plant wherein pole is corresponding with converting plant is inconsistent, be then judged as that converting plant DC voltage is sampled abnormal failure; Calculate the theoretical absolute value of DC voltage of an Inverter Station wherein pole; If the DC voltage sampling absolute value that the theoretical absolute value of DC voltage of an Inverter Station wherein pole is corresponding with Inverter Station is inconsistent, be then judged as that Inverter Station DC voltage is sampled abnormal failure.The present invention calculates the theoretical absolute value of DC voltage of converting plant and the theoretical absolute value of DC voltage of Inverter Station, can determine whether exactly to occur DC voltage sampling abnormal failure, thus find fault occurrence reason fast, avoid whole DC transmission system to occur catastrophic failure.
Description
Technical field
The present invention relates to technical field of double-pole, particularly a kind of double pole direct current transmission system direct current voltage sampling fault detection method and device.
Background technology
In bipolar direct current transmission system, include converting plant and Inverter Station, it is direct current that converting plant is used for exchange conversion, delivers to connected Inverter Station by DC line, and DC converting becomes to exchange by Inverter Station.
Prior art, by various pick-up unit, detects the operational factor of converting plant and Inverter Station, to guarantee safety, particularly needs to DC voltage parameter the measurement carrying out the moment, to guarantee its normal operation.
But, when discovery fault, particularly DC voltage sampled value occur abnormal, prior art also fails to determine whether rapidly to occur DC voltage sampled value fault, thus fail accurate localizing faults, finally cause whole DC transmission system to occur catastrophic failure, affect production work.
Summary of the invention
Based on this, be necessary to fail, when DC voltage sampled value occurs abnormal, to determine whether the technical matters occurring DC voltage sampled value fault for prior art, a kind of double pole direct current transmission system direct current voltage sampling fault detection method and device are provided.
A kind of double pole direct current transmission system direct current voltage sampling fault detection method, comprising:
Obtain multiple converting plants site parameter of the converting plant of described bipolar direct current transmission system, calculate the theoretical absolute value of DC voltage of a converting plant wherein pole according to described converting plant site parameter;
If the difference of the DC voltage sampling absolute value that the theoretical absolute value of DC voltage of a converting plant wherein pole is corresponding with converting plant exceedes default converting plant DC voltage theory and measures difference limen value, be then judged as that converting plant DC voltage is sampled abnormal failure make alarm;
Obtain multiple Inverter Station site parameters of the Inverter Station of described bipolar direct current transmission system, calculate the theoretical absolute value of DC voltage of an Inverter Station wherein pole according to described Inverter Station site parameter;
If the difference of the DC voltage sampling absolute value that the theoretical absolute value of DC voltage of an Inverter Station wherein pole is corresponding with Inverter Station exceedes default Inverter Station DC voltage theory and measures difference limen value, be then judged as that Inverter Station DC voltage is sampled abnormal failure make alarm.
A kind of double pole direct current transmission system direct current voltage sampling failure detector, comprising:
The theoretical absolute value acquisition module of converting plant DC voltage, for obtaining multiple converting plants site parameter of the converting plant of described bipolar direct current transmission system, calculates the theoretical absolute value of DC voltage of a converting plant wherein pole according to described converting plant site parameter;
Converting plant DC voltage compares module, if the difference for the theoretical absolute value of DC voltage of the converting plant wherein pole DC voltage sampling absolute value corresponding with converting plant exceedes default converting plant DC voltage theory and measures difference limen value, be then judged as that converting plant DC voltage is sampled abnormal failure make alarm;
The theoretical absolute value acquisition module of Inverter Station DC voltage, for obtaining multiple Inverter Station site parameters of the Inverter Station of described bipolar direct current transmission system, calculates the theoretical absolute value of DC voltage of an Inverter Station wherein pole according to described Inverter Station site parameter;
Inverter Station DC voltage compares module, if the difference for the theoretical absolute value of DC voltage of the Inverter Station wherein pole DC voltage sampling absolute value corresponding with Inverter Station exceedes default Inverter Station DC voltage theory and measures difference limen value, be then judged as that Inverter Station DC voltage is sampled abnormal failure make alarm.
The present invention is by obtaining the site parameter of converting plant and Inverter Station, and calculate the theoretical absolute value of DC voltage of converting plant and the theoretical absolute value of DC voltage of Inverter Station according to site parameter, and for comparing with corresponding DC voltage absolute value of sampling, thus when abnormal DC voltage sampled value appears in converting plant or Inverter Station, can determine whether exactly to occur DC voltage sampling abnormal failure, thus find fault occurrence reason fast, avoid whole DC transmission system to occur catastrophic failure.
Accompanying drawing explanation
Fig. 1 is the workflow diagram of a kind of double pole direct current transmission system direct current voltage sampling of the present invention fault detection method;
Fig. 2 is the construction module figure of a kind of double pole direct current transmission system direct current voltage sampling of the present invention failure detector.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Be illustrated in figure 1 a kind of double pole direct current transmission system direct current voltage sampling of the present invention fault detection method, comprise:
Step S101, obtains multiple converting plants site parameter of the converting plant of described bipolar direct current transmission system, calculates the theoretical absolute value of DC voltage of a converting plant wherein pole according to described converting plant site parameter;
Step S102, if the difference of the DC voltage sampling absolute value that the theoretical absolute value of DC voltage of a converting plant wherein pole is corresponding with converting plant exceedes default converting plant DC voltage theory and measures difference limen value, be then judged as that converting plant DC voltage is sampled abnormal failure make alarm;
Step S103, obtains multiple Inverter Station site parameters of the Inverter Station of described bipolar direct current transmission system, calculates the theoretical absolute value of DC voltage of an Inverter Station wherein pole according to described Inverter Station site parameter;
Step S104, if the difference of the DC voltage sampling absolute value that the theoretical absolute value of DC voltage of an Inverter Station wherein pole is corresponding with Inverter Station exceedes default Inverter Station DC voltage theory and measures difference limen value, be then judged as that Inverter Station DC voltage is sampled abnormal failure make alarm.
Wherein step S101 and step S103 can adopt asynchronous system to perform, and namely while step S101 and step S102 checks converting plant in execution, synchronously can perform step S103 and step S104 checks Inverter Station.Certainly, step S101-step S104 also can adopt order to perform, namely, after execution step S101 and step S102 checks converting plant, after eliminating converting plant DC voltage sampling abnormal failure, perform step S103 and step S104 and Inverter Station is checked.Also can be after execution step S103 and step S104 checks Inverter Station, after having discharged Inverter Station DC voltage sampling abnormal failure, perform step S101 and step S102 and converting plant is checked.Or even after execution step S101 and step S102 checks converting plant, when after confirmation converting plant DC voltage sampling abnormal failure, still perform step S103 and step S104 and Inverter Station is checked.Also can be after execution step S103 and step S104 checks Inverter Station, when after confirmation Inverter Station DC voltage sampling abnormal failure, still perform step S103 and step S104 and converting plant is checked.
The wherein theoretical absolute value of DC voltage of a converting plant wherein pole, can be the theoretical absolute value of DC voltage of the pole 1 of converting plant, also can be the DC voltage theory absolute value of the pole 2 of converting plant.
The wherein theoretical absolute value of DC voltage of an Inverter Station wherein pole, can be the theoretical absolute value of DC voltage of the pole 1 of Inverter Station, also can be the DC voltage theory absolute value of the pole 2 of Inverter Station.
Wherein in an embodiment, the theoretical absolute value of DC voltage of a described converting plant wherein pole calculates in the following way:
Obtain the change of current variation joint gear of the converting plant wherein alternating voltage sampled value of the alternating voltage sampled value of a pole, the other pole of converting plant, converting plant secondary side voltage minimum voltage number percent, the converting plant wherein other pole of change of current variation joint gear and converting plant of a pole, calculate the converting plant converter power transformer non-loaded line voltage effective value of a converting plant wherein pole, and the converting plant converter power transformer non-loaded line voltage effective value of the other pole of converting plant;
Obtain the DC voltage sampling absolute value of a converting plant other pole, converting plant often extremely in the mean value of 6 pulse conversion device numbers, the rectifier Trigger Angle of the other pole of converting plant and the converting plant wherein DC current values of the other pole of DC current values and converting plant of a pole, according to the converting plant converter power transformer non-loaded line voltage effective value of the other pole of described converting plant, calculate the converter power transformer leakage reactance of converting plant;
Obtain the rectifier Trigger Angle of a converting plant wherein pole, according to the converter power transformer leakage reactance of described converting plant, calculate the theoretical absolute value of DC voltage of a converting plant wherein pole.
Preferably, the theoretical absolute value of DC voltage of a described converting plant wherein pole, specifically obtains in the following way:
Calculate the converting plant converter power transformer non-loaded line voltage effective value U of a converting plant wherein pole
11, and the converting plant converter power transformer non-loaded line voltage effective value U of the other pole of converting plant
12, adopt following formulae discovery:
U
11=ACvolMea
1/[(UACminsec
1-1%)+TC1P1P0
11/100]，
U
12=ACvolMea
2/ [(UACminsec
1-1%)+TC1P1P0
12/ 100], wherein, ACvolMea
11the change of current for converting plant fault pole becomes net top-cross stream voltage sample value, ACvolMea
12the change of current for the normal pole of converting plant becomes net top-cross stream voltage sample value, UACminsec
1for converter transformer valve side voltage minimum voltage number percent, TC1P1P0
11for the change of current variation joint gear of converting plant fault pole, TC1P1P0
12for the change of current variation joint gear of the normal pole of converting plant;
Calculate the converter power transformer leakage reactance Xr1 of converting plant
1, adopt following formulae discovery:
U
dc12=N11 (1.35U
12cos α
12-3Xr1
1id
12/ π), wherein U
dc12for the DC voltage absolute value of the normal pole of converting plant, N11 be converting plant every extremely in 6 pulse conversion device numbers, α
12for the rectifier Trigger Angle of the normal pole of converting plant, Id
12for the DC current values of the normal pole of converting plant;
Calculate the theoretical absolute value of DC voltage of converting plant fault pole, adopt formula as follows:
U
dc11=N11 (1.35U
11cos α
11-3Xr1
1id
11/ π), wherein U
dc11the theoretical absolute value of DC voltage for converting plant fault pole, α
11for the rectifier Trigger Angle of converting plant fault pole, Id
11for the DC current values of converting plant fault pole.
Wherein in an embodiment, the theoretical absolute value of DC voltage of a described Inverter Station wherein pole calculates in the following way:
Obtain alternating voltage sampled value, the alternating voltage sampled value of the other pole of Inverter Station, Inverter Station secondary side voltage minimum voltage number percent, the Inverter Station wherein change of current variation joint gear of a pole and the change of current variation joint gear of the other pole of Inverter Station of an Inverter Station wherein pole, calculate the Inverter Station converter power transformer non-loaded line voltage effective value of an Inverter Station wherein pole, and the Inverter Station converter power transformer non-loaded line voltage effective value of the other pole of Inverter Station;
Obtain the DC voltage sampling absolute value of the other pole of Inverter Station, Inverter Station often extremely in the mean value of 6 pulse conversion device numbers, the transverter Trigger Angle of the other pole of Inverter Station and the Inverter Station wherein DC current values of a pole and the DC current values of the other pole of Inverter Station, according to the Inverter Station converter power transformer non-loaded line voltage effective value of the other pole of described Inverter Station, calculate the converter power transformer leakage reactance of Inverter Station;
Obtain the transverter Trigger Angle of an Inverter Station wherein pole, according to the converter power transformer leakage reactance of described Inverter Station, calculate the theoretical absolute value of DC voltage of an Inverter Station wherein pole.
Preferably, the theoretical absolute value of DC voltage of a described Inverter Station wherein pole, specifically obtains in the following way:
Calculate the Inverter Station converter power transformer non-loaded line voltage effective value U of an Inverter Station wherein pole
21, and the Inverter Station converter power transformer non-loaded line voltage effective value U of the other pole of Inverter Station
22, adopt following formulae discovery:
U
21=ACvolMea
21/[(UACminsec
2-1%)+TC1P1P0
21/100]，
U
22=ACvolMea
22/ [(UACminsec
2-1%)+TC1P1P0
22/ 100], wherein, ACvolMea
21the change of current for Inverter Station fault pole becomes net top-cross stream voltage sample value, ACvolMea
22the change of current for the normal pole of Inverter Station becomes net top-cross stream voltage sample value, UACminsec
2for converter transformer valve side voltage minimum voltage number percent, TC1P1P0
21for the change of current variation joint gear of Inverter Station fault pole, TC1P1P0
22for the change of current variation joint gear of the normal pole of Inverter Station;
Calculate the converter power transformer leakage reactance Xr1 of Inverter Station
2, adopt following formulae discovery:
U
dc22=N12 (1.35U
22cos γ 22+3Xr1
2id
22/ π), wherein U
dc22for the DC voltage absolute value of the normal pole of Inverter Station, N12 be Inverter Station every extremely in 6 pulse conversion device numbers, γ 22 is the Inverter Station extinguish angle of the normal pole of Inverter Station, Id
22for the DC current values of the normal pole of Inverter Station;
Calculate the theoretical absolute value of DC voltage of Inverter Station fault pole, adopt formula as follows:
U
dc21=N12 (1.35U
21cos γ 21+3Xr1
2id
21/ π), wherein U
dc21the theoretical absolute value of DC voltage for the normal pole of Inverter Station, γ 21 is the Inverter Station extinguish angle of Inverter Station fault pole, Id
21for the DC current values of Inverter Station fault pole.
As an example, for natural bridge station and Guangzhou Railway Station, wherein natural bridge Zhan Shi converting plant, Guangzhou Railway Station is Inverter Station, exchange conversion is the direct current of 500kV by natural bridge station, delivers to Guangzhou Railway Station by DC line, and 500kV DC converting is become the interchange of 220kV by Guangzhou Railway Station.
At 08:10 on June 30th, 2013, pole 1, natural bridge station DC voltage sampling absolute value reaches 519kV, and the DC voltage sampling absolute value of pole 2 is 501.4kV, adopts the mode of the embodiment of the present invention to analyze:
Calculate the theoretical absolute value of DC voltage of natural bridge pole 1, concrete numerical value as shown in Table 1 and Table 2:
Pole 1, table 1 natural bridge station sampled data
Pole 2, table 2 natural bridge station sampled data
Account form is as follows:
Calculate the converting plant converter power transformer non-loaded line voltage effective value U of converting plant pole 1
11, and the converting plant converter power transformer non-loaded line voltage effective value U of converting plant pole 2
12, adopt following formulae discovery:
U
11=ACvolMea
1/[(UACminsec
1-1%)+TC1P1P0
11/100]，
U
12=ACvolMea
2/ [(UACminsec
1-1%)+TC1P1P0
12/ 100], wherein, ACvolMea
11the change of current for converting plant fault pole becomes net top-cross stream voltage sample value, ACvolMea
12the change of current for the normal pole of converting plant becomes net top-cross stream voltage sample value, UACminsec
1for converting plant converter transformer valve side voltage minimum voltage number percent, TC1P1P0
11for the change of current variation joint gear of converting plant fault pole, TC1P1P0
12for the change of current variation joint gear of the normal pole of converting plant;
Substitute into related data, calculate:
U
11=229.7×208.6/230÷[（94%-1%）+7/100]≈208.33kV；
U
12=229.9×208.6/230÷[（94%-1%）+10/100]≈202.44kV；
Wherein, 208.6/230 is the no-load voltage ratio of natural bridge station change of current variation joint 7 grades time, 229.7 × 208.6/230 converter transformer valve side alternating voltage sampled values being converting plant fault pole.
Calculate the converter power transformer leakage reactance Xr1 of converting plant
1, adopt following formulae discovery:
U
dc12=N11 (1.35U
12cos α
12-3Xr1
1id
12/ π), wherein U
dc12for the DC voltage absolute value of the normal pole of converting plant, N11 be converting plant every extremely in 6 pulse conversion device numbers, α
12for the rectifier Trigger Angle of the normal pole of converting plant, Id
12for the DC current values of the normal pole of converting plant;
By U
12substitution obtains:
501.4=2 × { [1.35 × 202.44 × cos15.5]-[(3Xr1 × 0.8324) ÷ π] }, thus calculate 3Xr1 ≈ 47.735;
Calculate the theoretical absolute value of DC voltage of converting plant fault pole, adopt formula as follows:
U
dc11=N11 (1.35U
11cos α
11-3Xr1
1id
11/ π), wherein U
dc11the theoretical absolute value of DC voltage for converting plant fault pole, α
11for the rectifier Trigger Angle of converting plant fault pole, Id
11for the DC current values of converting plant fault pole.
By 3Xr1
1≈ 47.735 substitutes into, thus calculates the DC voltage U of converting plant pole 1
dc11for: U
dc11=2 { [1.35 × 208.33 × cos15.2]-[(47.735 × 0.8339) ÷ π] } ≈ 517.46kV.
The sample difference of absolute value 519 of the DC voltage of the theoretical absolute value of this DC voltage and pole 1 is 1.54kV, it is 5kV that the converting plant DC voltage theory preset measures difference limen value, therefore, get rid of converting plant DC voltage measurement fault, if the DC voltage of the theoretical absolute value of DC voltage and pole 1 is sampled, the difference of absolute value is more than 5kV, then judge that described bipolar direct current transmission system voltage fluctuation fault is converting plant DC voltage measurement fault.
Calculate the theoretical absolute value of DC voltage of natural bridge pole 1, concrete numerical value as shown in Table 3 and Table 4:
Table 3 Guangzhou Railway Station pole 1 sampled data
Table 4 Guangzhou Railway Station pole 2 sampled data
Account form is as follows:
Calculate the Inverter Station converter power transformer non-loaded line voltage effective value U of Inverter Station pole 1
21, and the Inverter Station converter power transformer non-loaded line voltage effective value U of Inverter Station pole 2
22, adopt following formulae discovery:
U
21=ACvolMea
21/[(UACminsec
2-1%)+TC1P1P0
21/100]，
U
22=ACvolMea
22/ [(UACminsec
2-1%)+TC1P1P0
22/ 100], wherein, ACvolMea
21the change of current for Inverter Station fault pole becomes net top-cross stream voltage sample value, ACvolMea
22the change of current for the normal pole of Inverter Station becomes net top-cross stream voltage sample value, UACminsec
2for converter transformer valve side voltage minimum voltage number percent, TC1P1P0
21for the change of current variation joint gear of Inverter Station fault pole, TC1P1P0
22for the change of current variation joint gear of the normal pole of Inverter Station;
Substitute into related data, calculate:
U
21=228.7×198.5/230÷[（94%-1%）+4/100]≈203.48kV
U
22=228.7×198.5/230÷[（94%-1%）+7/100]≈197.37kV。
Wherein, 198.5/230 is the no-load voltage ratio of Guangzhou Railway Station change of current variation joint 7 grades time, 228.7 × 198.5/230 converter transformer valve side alternating voltage sampled values being the normal pole of Inverter Station.
Calculate the converter power transformer leakage reactance Xr1 of Inverter Station
2, adopt following formulae discovery:
U
dc22=N12 (1.35U
22cos γ 22+3Xr1
2id
22/ π), wherein U
dc22for the DC voltage absolute value of the normal pole of Inverter Station, N12 be Inverter Station every extremely in 6 pulse conversion device numbers, γ 22 is the extinguish angle of the normal pole of Inverter Station, Id
22for the DC current values of the normal pole of Inverter Station;
Calculate the theoretical absolute value of DC voltage of Inverter Station fault pole, adopt formula as follows:
U
dc21=N12 (1.35U
21cos γ 21+3Xr1
21id
2/ π), wherein U
dc21the theoretical absolute value of DC voltage for the normal pole of Inverter Station, γ 21 is the extinguish angle of Inverter Station fault pole, Id
21for the DC current values of Inverter Station fault pole.
The relatively theoretical absolute value of the DC voltage of Guangzhou Railway Station pole 1 and DC voltage sampling absolute value, its difference is 16.4kV, is greater than default Inverter Station DC voltage theory and measures difference limen value (5kV).Therefore, judge that described bipolar direct current transmission system voltage fluctuation fault is Inverter Station DC voltage sampling abnormal failure.
Be illustrated in figure 2 the construction module figure of a kind of double pole direct current transmission system direct current voltage sampling of the present invention failure detector, comprise:
The theoretical absolute value acquisition module 210 of converting plant DC voltage, for obtaining multiple converting plants site parameter of the converting plant of described bipolar direct current transmission system, calculates the theoretical absolute value of DC voltage of a converting plant wherein pole according to described converting plant site parameter;
Converting plant DC voltage compares module 220, if the difference for the theoretical absolute value of DC voltage of the converting plant wherein pole DC voltage sampling absolute value corresponding with converting plant exceedes default converting plant DC voltage theory and measures difference limen value, be then judged as that converting plant DC voltage is sampled abnormal failure make alarm;
The theoretical absolute value acquisition module 230 of Inverter Station DC voltage, for obtaining multiple Inverter Station site parameters of the Inverter Station of described bipolar direct current transmission system, calculates the theoretical absolute value of DC voltage of an Inverter Station wherein pole according to described Inverter Station site parameter;
Inverter Station DC voltage compares module 240, if the difference for the theoretical absolute value of DC voltage of the Inverter Station wherein pole DC voltage sampling absolute value corresponding with Inverter Station exceedes default Inverter Station DC voltage theory and measures difference limen value, be then judged as that Inverter Station DC voltage is sampled abnormal failure make alarm.
Wherein in an embodiment, the theoretical absolute value of DC voltage of a described converting plant wherein pole calculates in the following way:
Obtain the change of current variation joint gear of the converting plant wherein alternating voltage sampled value of the alternating voltage sampled value of a pole, the other pole of converting plant, converting plant secondary side voltage minimum voltage number percent, the converting plant wherein other pole of change of current variation joint gear and converting plant of a pole, calculate the converting plant converter power transformer non-loaded line voltage effective value of a converting plant wherein pole, and the converting plant converter power transformer non-loaded line voltage effective value of the other pole of converting plant;
Obtain the DC voltage sampling absolute value of a converting plant other pole, converting plant often extremely in the mean value of 6 pulse conversion device numbers, the rectifier Trigger Angle of the other pole of converting plant and the converting plant wherein DC current values of the other pole of DC current values and converting plant of a pole, according to the converting plant converter power transformer non-loaded line voltage effective value of the other pole of described converting plant, calculate the converter power transformer leakage reactance of converting plant;
Obtain the rectifier Trigger Angle of a converting plant wherein pole, according to the converter power transformer leakage reactance of described converting plant, calculate the theoretical absolute value of DC voltage of a converting plant wherein pole.
Preferably, the theoretical absolute value of DC voltage of a described converting plant wherein pole, specifically obtains in the following way:
Calculate the converting plant converter power transformer non-loaded line voltage effective value U of a converting plant wherein pole
11, and the converting plant converter power transformer non-loaded line voltage effective value U of the other pole of converting plant
12, adopt following formulae discovery:
U
11=ACvolMea
1/[(UACminsec
1-1%)+TC1P1P0
11/100]，
U
12=ACvolMea
2/ [(UACminsec
1-1%)+TC1P1P0
12/ 100], wherein, ACvolMea
11the change of current for converting plant fault pole becomes net top-cross stream voltage sample value, ACvolMea
12the change of current for the normal pole of converting plant becomes net top-cross stream voltage sample value, UACminsec
1for converting plant converter transformer valve side voltage minimum voltage number percent, TC1P1P0
11for the change of current variation joint gear of converting plant fault pole, TC1P1P0
12for the change of current variation joint gear of the normal pole of converting plant;
Calculate the converter power transformer leakage reactance Xr1 of converting plant
1, adopt following formulae discovery:
U
dc12=N11 (1.35U
12cos α
12-3Xr1
1id
12/ π), wherein U
dc12for the DC voltage absolute value of the normal pole of converting plant, N11 be converting plant every extremely in 6 pulse conversion device numbers, α
12for the rectifier Trigger Angle of the normal pole of converting plant, Id
12for the DC current values of the normal pole of converting plant;
Calculate the theoretical absolute value of DC voltage of converting plant fault pole, adopt formula as follows:
U
dc11=N11 (1.35U
11cos α
11-3Xr1
1id
11/ π), wherein U
dc11the theoretical absolute value of DC voltage for converting plant fault pole, α
11for the rectifier Trigger Angle of converting plant fault pole, Id
11for the DC current values of converting plant fault pole.
Wherein in an embodiment, the theoretical absolute value of DC voltage of a described Inverter Station wherein pole calculates in the following way:
Obtain alternating voltage sampled value, the alternating voltage sampled value of the other pole of Inverter Station, Inverter Station secondary side voltage minimum voltage number percent, the Inverter Station wherein change of current variation joint gear of a pole and the change of current variation joint gear of the other pole of Inverter Station of an Inverter Station wherein pole, calculate the Inverter Station converter power transformer non-loaded line voltage effective value of an Inverter Station wherein pole, and the Inverter Station converter power transformer non-loaded line voltage effective value of the other pole of Inverter Station;
Obtain the DC voltage sampling absolute value of the other pole of Inverter Station, Inverter Station often extremely in the mean value of 6 pulse conversion device numbers, the transverter Trigger Angle of the other pole of Inverter Station and the Inverter Station wherein DC current values of a pole and the DC current values of the other pole of Inverter Station, according to the Inverter Station converter power transformer non-loaded line voltage effective value of the other pole of described Inverter Station, calculate the converter power transformer leakage reactance of Inverter Station;
Obtain the transverter Trigger Angle of an Inverter Station wherein pole, according to the converter power transformer leakage reactance of described Inverter Station, calculate the theoretical absolute value of DC voltage of an Inverter Station wherein pole.
Preferably, the theoretical absolute value of DC voltage of a described Inverter Station wherein pole, specifically obtains in the following way:
Calculate the Inverter Station converter power transformer non-loaded line voltage effective value U of an Inverter Station wherein pole
21, and the Inverter Station converter power transformer non-loaded line voltage effective value U of the other pole of Inverter Station
22, adopt following formulae discovery:
U
21=ACvolMea
21/[(UACminsec
2-1%)+TC1P1P0
21/100]，
U
22=ACvolMea
22/ [(UACminsec
2-1%)+TC1P1P0
22/ 100], wherein, ACvolMea
21for the Inverter Station change of current becomes the alternating voltage sampled value of net fault pole, side, ACvolMea
22the change of current for the normal pole of Inverter Station becomes net top-cross stream voltage sample value, UACminsec
2for converter transformer valve side voltage minimum voltage number percent, TC1P1P0
21for the change of current variation joint gear of Inverter Station fault pole, TC1P1P0
22for the change of current variation joint gear of the normal pole of Inverter Station;
Calculate the converter power transformer leakage reactance Xr1 of Inverter Station
2, adopt following formulae discovery:
U
dc22=N12 (1.35U
22cos γ 22+3Xr1
2id
22/ π), wherein U
dc22for the DC voltage absolute value of the normal pole of Inverter Station, N12 be Inverter Station every extremely in 6 pulse conversion device numbers, γ 22 is the extinguish angle of the normal pole of Inverter Station, Id
21for the DC current values of the normal pole of Inverter Station;
Calculate the theoretical absolute value of DC voltage of Inverter Station fault pole, adopt formula as follows:
U
dc21=N12 (1.35U
21cos γ 21+3Xr1
21id
2/ π), wherein U
dc21the theoretical absolute value of DC voltage for the normal pole of Inverter Station, γ 21 is the extinguish angle of Inverter Station fault pole, Id
22for the DC current values of Inverter Station fault pole.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a double pole direct current transmission system direct current voltage sampling fault detection method, is characterized in that, comprising:
Obtain multiple converting plants site parameter of the converting plant of described bipolar direct current transmission system, calculate the theoretical absolute value of DC voltage of a converting plant wherein pole according to described converting plant site parameter;
If the difference of the DC voltage sampling absolute value that the theoretical absolute value of DC voltage of a converting plant wherein pole is corresponding with converting plant exceedes default converting plant DC voltage theory and measures difference limen value, be then judged as that converting plant DC voltage is sampled abnormal failure make alarm;
Obtain multiple Inverter Station site parameters of the Inverter Station of described bipolar direct current transmission system, calculate the theoretical absolute value of DC voltage of an Inverter Station wherein pole according to described Inverter Station site parameter;
If the difference of the DC voltage sampling absolute value that the theoretical absolute value of DC voltage of an Inverter Station wherein pole is corresponding with Inverter Station exceedes default Inverter Station DC voltage theory and measures difference limen value, be then judged as that Inverter Station DC voltage is sampled abnormal failure make alarm;
The theoretical absolute value of DC voltage of a described converting plant wherein pole calculates in the following way:
Obtain the change of current variation joint gear of the converting plant wherein alternating voltage sampled value of the alternating voltage sampled value of a pole, the other pole of converting plant, converting plant secondary side voltage minimum voltage number percent, the converting plant wherein other pole of change of current variation joint gear and converting plant of a pole, calculate the converting plant converter power transformer non-loaded line voltage effective value of a converting plant wherein pole, and the converting plant converter power transformer non-loaded line voltage effective value of the other pole of converting plant;
Obtain the DC voltage sampling absolute value of a converting plant other pole, converting plant often extremely in the mean value of 6 pulse conversion device numbers, the rectifier Trigger Angle of the other pole of converting plant and the converting plant wherein DC current values of the other pole of DC current values and converting plant of a pole, according to the converting plant converter power transformer non-loaded line voltage effective value of the other pole of described converting plant, calculate the converter power transformer leakage reactance of converting plant;
Obtain the rectifier Trigger Angle of a converting plant wherein pole, according to the converter power transformer leakage reactance of described converting plant, calculate the theoretical absolute value of DC voltage of a converting plant wherein pole.
2. double pole direct current transmission system direct current voltage according to claim 1 sampling fault detection method, is characterized in that, the theoretical absolute value of DC voltage of a described converting plant wherein pole, specifically obtains in the following way:
Calculate the converting plant converter power transformer non-loaded line voltage effective value U of a converting plant wherein pole
11, and the converting plant converter power transformer non-loaded line voltage effective value U of the other pole of converting plant
12, adopt following formulae discovery:
U
11＝ACvolMea
11/[(UACminsec
1-1％)+TC1P1P0
11/100]，
U
12=ACvolMea
12/ [(UACminsec
1-1%)+TC1P1P0
12/ 100], wherein, ACvolMea
11for the change of current of a converting plant wherein pole becomes net top-cross stream voltage sample value, ACvolMea
12the change of current for the other pole of converting plant becomes net top-cross stream voltage sample value, UACminsec
1for converting plant converter transformer valve side voltage minimum voltage number percent, TC1P1P0
11for the change of current variation joint gear of a converting plant wherein pole, TC1P1P0
12for the change of current variation joint gear of the other pole of converting plant;
Calculate the converter power transformer leakage reactance Xr1 of converting plant
1, adopt following formulae discovery:
U
dc12=N11 (1.35U
12cos α
12-3Xr1
1id
12/ π), wherein U
dc12for the DC voltage absolute value of the normal pole of converting plant, N11 be converting plant every extremely in 6 pulse conversion device numbers, α
12for the rectifier Trigger Angle of the normal pole of converting plant, Id
12for the DC current values of the normal pole of converting plant;
Calculate the theoretical absolute value of DC voltage of converting plant fault pole, adopt formula as follows:
U
dc11=N11 (1.35U
11cos α
11-3Xr1
1id
11/ π), wherein U
dc11the theoretical absolute value of DC voltage for converting plant fault pole, α
11for the rectifier Trigger Angle of converting plant fault pole, Id
11for the DC current values of converting plant fault pole.
3. double pole direct current transmission system direct current voltage according to claim 1 sampling fault detection method, is characterized in that, the theoretical absolute value of DC voltage of a described Inverter Station wherein pole calculates in the following way:
Obtain alternating voltage sampled value, the alternating voltage sampled value of the other pole of Inverter Station, Inverter Station secondary side voltage minimum voltage number percent, the Inverter Station wherein change of current variation joint gear of a pole and the change of current variation joint gear of the other pole of Inverter Station of an Inverter Station wherein pole, calculate the Inverter Station converter power transformer non-loaded line voltage effective value of an Inverter Station wherein pole, and the Inverter Station converter power transformer non-loaded line voltage effective value of the other pole of Inverter Station;
Obtain the DC voltage sampling absolute value of the other pole of Inverter Station, Inverter Station often extremely in the mean value of 6 pulse conversion device numbers, the transverter Trigger Angle of the other pole of Inverter Station and the Inverter Station wherein DC current values of a pole and the DC current values of the other pole of Inverter Station, according to the Inverter Station converter power transformer non-loaded line voltage effective value of the other pole of described Inverter Station, calculate the converter power transformer leakage reactance of Inverter Station;
Obtain the transverter Trigger Angle of an Inverter Station wherein pole, according to the converter power transformer leakage reactance of described Inverter Station, calculate the theoretical absolute value of DC voltage of an Inverter Station wherein pole.
4. double pole direct current transmission system direct current voltage according to claim 3 sampling fault detection method, is characterized in that, the theoretical absolute value of DC voltage of a described Inverter Station wherein pole, specifically obtains in the following way:
Calculate the Inverter Station converter power transformer non-loaded line voltage effective value U of an Inverter Station wherein pole
21, and the Inverter Station converter power transformer non-loaded line voltage effective value U of the other pole of Inverter Station
22, adopt following formulae discovery:
U
21＝ACvolMea
21/[(UACminsec
2-1％)+TC1P1P0
21/100]，
U
22=ACvolMea
22/ [(UACminsec
2-1%)+TC1P1P0
22/ 100], wherein, ACvolMea
21the change of current for Inverter Station fault pole becomes net top-cross stream voltage sample value, ACvolMea
22the change of current for the normal pole of Inverter Station becomes net top-cross stream voltage sample value, UACminsec
2for converter transformer valve side voltage minimum voltage number percent, TC1P1P0
21for the change of current variation joint gear of Inverter Station fault pole, TC1P1P0
22for the change of current variation joint gear of the normal pole of Inverter Station;
Calculate the converter power transformer leakage reactance Xr1 of Inverter Station
2, adopt following formulae discovery:
U
dc22=N12 (1.35U
22cos γ 22+3Xr1
2id
22/ π), wherein U
dc22for the DC voltage absolute value of the normal pole of Inverter Station, N12 be Inverter Station every extremely in 6 pulse conversion device numbers, γ 22 is the Inverter Station extinguish angle of the normal pole of Inverter Station, Id
22for the DC current values of the normal pole of Inverter Station;
Calculate the theoretical absolute value of DC voltage of Inverter Station fault pole, adopt formula as follows:
U
dc21=N12 (1.35U
21cos γ 21+3Xr1
2id
21/ π), wherein U
dc21the theoretical absolute value of DC voltage for the normal pole of Inverter Station, γ 21 is the Inverter Station extinguish angle of Inverter Station fault pole, Id
21for the DC current values of Inverter Station fault pole.
5. a double pole direct current transmission system direct current voltage sampling failure detector, is characterized in that, comprising:
The theoretical absolute value acquisition module of converting plant DC voltage, for obtaining multiple converting plants site parameter of the converting plant of described bipolar direct current transmission system, calculates the theoretical absolute value of DC voltage of a converting plant wherein pole according to described converting plant site parameter;
Converting plant DC voltage compares module, if the difference for the theoretical absolute value of DC voltage of the converting plant wherein pole DC voltage sampling absolute value corresponding with converting plant exceedes default converting plant DC voltage theory and measures difference limen value, be then judged as that converting plant DC voltage is sampled abnormal failure make alarm;
The theoretical absolute value acquisition module of Inverter Station DC voltage, for obtaining multiple Inverter Station site parameters of the Inverter Station of described bipolar direct current transmission system, calculates the theoretical absolute value of DC voltage of an Inverter Station wherein pole according to described Inverter Station site parameter;
Inverter Station DC voltage compares module, if the difference for the theoretical absolute value of DC voltage of the Inverter Station wherein pole DC voltage sampling absolute value corresponding with Inverter Station exceedes default Inverter Station DC voltage theory and measures difference limen value, be then judged as that Inverter Station DC voltage is sampled abnormal failure make alarm;
The theoretical absolute value of DC voltage of a described converting plant wherein pole calculates in the following way:
Obtain the change of current variation joint gear of the converting plant wherein alternating voltage sampled value of the alternating voltage sampled value of a pole, the other pole of converting plant, converting plant secondary side voltage minimum voltage number percent, the converting plant wherein other pole of change of current variation joint gear and converting plant of a pole, calculate the converting plant converter power transformer non-loaded line voltage effective value of a converting plant wherein pole, and the converting plant converter power transformer non-loaded line voltage effective value of the other pole of converting plant;
Obtain the DC voltage sampling absolute value of a converting plant other pole, converting plant often extremely in the mean value of 6 pulse conversion device numbers, the rectifier Trigger Angle of the other pole of converting plant and the converting plant wherein DC current values of the other pole of DC current values and converting plant of a pole, according to the converting plant converter power transformer non-loaded line voltage effective value of the other pole of described converting plant, calculate the converter power transformer leakage reactance of converting plant;
Obtain the rectifier Trigger Angle of a converting plant wherein pole, according to the converter power transformer leakage reactance of described converting plant, calculate the theoretical absolute value of DC voltage of a converting plant wherein pole.
6. double pole direct current transmission system direct current voltage according to claim 5 sampling failure detector, is characterized in that, the theoretical absolute value of DC voltage of a described converting plant wherein pole, specifically obtains in the following way:
Calculate the converting plant converter power transformer non-loaded line voltage effective value U of a converting plant wherein pole
11, and the converting plant converter power transformer non-loaded line voltage effective value U of the other pole of converting plant
12, adopt following formulae discovery:
U
11＝ACvolMea
11/[(UACminsec
1-1％)+TC1P1P0
11/100]，
U
12=ACvolMea
12/ [(UACminsec
1-1%)+TC1P1P0
12/ 100], wherein, ACvolMea
21the change of current for converting plant fault pole becomes net top-cross stream voltage sample value, ACvolMea
22the change of current for the normal pole of converting plant becomes net top-cross stream voltage sample value, UACminsec
2for converter transformer valve side voltage minimum voltage number percent, TC1P1P0
21for the change of current variation joint gear of converting plant fault pole, TC1P1P0
22for the change of current variation joint gear of the normal pole of converting plant;
Calculate the converter power transformer leakage reactance Xr1 of converting plant
2, adopt following formulae discovery:
U
dc22=N12 (1.35U
22cos α
22-3Xr1
2id
22/ π), wherein U
dc22for the DC voltage absolute value of the normal pole of converting plant, N12 be converting plant every extremely in 6 pulse conversion device numbers, α
22for the rectifier Trigger Angle of the normal pole of converting plant, Id
22for the DC current values of the normal pole of converting plant;
Calculate the theoretical absolute value of DC voltage of converting plant fault pole, adopt formula as follows:
U
dc21=N12 (1.35U
21cos α
21-3Xr1
2id
21/ π), wherein U
dc21the theoretical absolute value of DC voltage for the normal pole of converting plant, α
21for the rectifier Trigger Angle of converting plant fault pole, Id
21for the DC current values of converting plant fault pole.
7. double pole direct current transmission system direct current voltage according to claim 5 sampling failure detector, is characterized in that, the theoretical absolute value of DC voltage of a described Inverter Station wherein pole calculates in the following way:
Obtain alternating voltage sampled value, the alternating voltage sampled value of the other pole of Inverter Station, Inverter Station secondary side voltage minimum voltage number percent, the Inverter Station wherein change of current variation joint gear of a pole and the change of current variation joint gear of the other pole of Inverter Station of an Inverter Station wherein pole, calculate the Inverter Station converter power transformer non-loaded line voltage effective value of an Inverter Station wherein pole, and the Inverter Station converter power transformer non-loaded line voltage effective value of the other pole of Inverter Station;
Obtain the DC voltage sampling absolute value of the other pole of Inverter Station, Inverter Station often extremely in the mean value of 6 pulse conversion device numbers, the transverter Trigger Angle of the other pole of Inverter Station and the Inverter Station wherein DC current values of a pole and the DC current values of the other pole of Inverter Station, according to the Inverter Station converter power transformer non-loaded line voltage effective value of the other pole of described Inverter Station, calculate the converter power transformer leakage reactance of Inverter Station;
Obtain the transverter Trigger Angle of an Inverter Station wherein pole, according to the converter power transformer leakage reactance of described Inverter Station, calculate the theoretical absolute value of DC voltage of an Inverter Station wherein pole.
8. double pole direct current transmission system direct current voltage according to claim 7 sampling failure detector, is characterized in that, the theoretical absolute value of DC voltage of a described Inverter Station wherein pole, specifically obtains in the following way:
Calculate the Inverter Station converter power transformer non-loaded line voltage effective value U of an Inverter Station wherein pole
21, and the Inverter Station converter power transformer non-loaded line voltage effective value U of the other pole of Inverter Station
22, adopt following formulae discovery:
U
21＝ACvolMea
21/[(UACminsec
2-1％)+TC1P1P0
21/100]，
U
22=ACvolMea
22/ [(UACminsec
2-1%)+TC1P1P0
22/ 100], wherein, ACvolMea
21the change of current for Inverter Station fault pole becomes net top-cross stream voltage sample value, ACvolMea
22the change of current for the normal pole of Inverter Station becomes net top-cross stream voltage sample value, UACminsec
2for converter transformer valve side voltage minimum voltage number percent, TC1P1P0
21for the change of current variation joint gear of Inverter Station fault pole, TC1P1P0
22for the change of current variation joint gear of the normal pole of Inverter Station;
Calculate the converter power transformer leakage reactance Xr1 of Inverter Station
2, adopt following formulae discovery:
U
dc22=N12 (1.35U
22cos γ 22+3Xr1
2id
22/ π), wherein U
dc22for the DC voltage absolute value of the normal pole of Inverter Station, N12 be Inverter Station every extremely in 6 pulse conversion device numbers, γ 22 is the Inverter Station extinguish angle of the normal pole of Inverter Station, Id
22for the DC current values of the normal pole of Inverter Station;
Calculate the theoretical absolute value of DC voltage of Inverter Station fault pole, adopt formula as follows:
U
dc21=N12 (1.35U
21cos γ 21+3Xr1
2id
21/ π), wherein U
dc21the theoretical absolute value of DC voltage for the normal pole of Inverter Station, γ 21 is the Inverter Station extinguish angle of Inverter Station fault pole, Id
21for the DC current values of Inverter Station fault pole.
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| CN105548661B (en) * | 2016-02-02 | 2019-02-26 | 中国南方电网有限责任公司超高压输电公司 | A kind of monitoring method of extra-high voltage DC transmission system DC line voltage distribution fluctuation |
| CN107727963B (en) * | 2017-10-10 | 2019-08-09 | 中国南方电网有限责任公司超高压输电公司昆明局 | Fault discrimination method for electrical quantity measurement based on historical data samples and algorithm verification |
| CN108493982B (en) * | 2018-04-26 | 2020-06-30 | 南方电网科学研究院有限责任公司 | Voltage control method and device for flexible direct current transmission system |
| CN109143066B (en) * | 2018-09-04 | 2021-01-08 | 阳光电源（上海）有限公司 | Motor controller and sampling signal processing method thereof |
| CN110456131B (en) * | 2019-07-25 | 2021-06-22 | 南方电网科学研究院有限责任公司 | Method, device and equipment for positioning direct-current voltage measurement abnormity |
| CN110837023B (en) * | 2019-09-30 | 2020-11-24 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A method for judging abnormal voltage measurement of UHV DC rectifier side |
| CN110927646B (en) * | 2019-11-05 | 2021-02-19 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for positioning abnormal fault of direct-current voltage measurement of high-voltage direct-current power transmission system |
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