CN103149436B - The m-Acetyl chlorophosphonazo detection system of three-phase active power distribution network - Google Patents
The m-Acetyl chlorophosphonazo detection system of three-phase active power distribution network Download PDFInfo
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Abstract
The present invention discloses a kind of m-Acetyl chlorophosphonazo detection system of three-phase active power distribution network, comprise three-phase current test module, three phase static coordinate is to two-phase static coordinate conversion module, m-Acetyl chlorophosphonazo phase-locked loop circuit to be measured, two-phase static coordinate is to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module, low-pass filter, two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates is to two-phase static coordinate conversion module, and two-phase static coordinate is to three phase static transformation of coordinates module.The present invention is very effective to the m-Acetyl chlorophosphonazo voltage of distribution system, electric current on-line checkingi.Structure of the present invention is simple, clear concept, is the comparatively easy system that dynamic and static m-Acetyl chlorophosphonazo detects and m-Acetyl chlorophosphonazo is eliminated.
Description
Technical field
The present invention relates to the test of a kind of three-phase active power distribution network detection technique, particularly a kind of m-Acetyl chlorophosphonazo detection system of distribution system.
Background technology
At present, three-phase active power distribution network also can claim active micro-capacitance sensor, wherein comprising in a large number can the current transformer of feedback power, these equipment are except producing a large amount of harmonic currents, also has a large amount of m-Acetyl chlorophosphonazo electric currents, larger pollution is formed to electrical network, not only causes system effectiveness to reduce, also likely cause voltage ripple of power network and flickering.Therefore, carry out dynamic m-Acetyl chlorophosphonazo compensation to three-phase active power distribution network and eliminate extremely important, wherein crucial technology is the on-line checkingi of the m-Acetyl chlorophosphonazo electric current to system.On-line testing for harmonic current proven technique existing with elimination.But apply existing harmonic current method of testing and can reveal a large amount of m-Acetyl chlorophosphonazo compositions, cause comparatively big error, reduce effect.The online test method of the m-Acetyl chlorophosphonazo electric current of current engineer applied, computation process very complicated.
Publication number is the Chinese invention patent (application number is 200810068451.3) of 101493482, and this invention is a kind of " single-phase harmonic current detecting method " just, can not test three-phase distribution net, can not test m-Acetyl chlorophosphonazo; And tested object corresponding to the present invention for " three-phase distribution net " corresponding be three-phase, both the object that is suitable for completely different; What the present invention tested is m-Acetyl chlorophosphonazo voltage, electric current, test be the electricity of different frequency.
Above patented method does not still have the problem of the online test method computation process very complicated of the m-Acetyl chlorophosphonazo electric current that can solve current engineer applied.
Summary of the invention
The present invention be directed to the deficiency of present technology, propose a kind of m-Acetyl chlorophosphonazo detection system of comparatively easy three-phase active power distribution network, this system can solve the problem of the on-line checkingi of harmonic current in the middle of active micro-capacitance sensor, may be used for the test of dynamic and static m-Acetyl chlorophosphonazo and m-Acetyl chlorophosphonazo compensation.
For achieving the above object, the technical solution used in the present invention is:
A m-Acetyl chlorophosphonazo detection system for three-phase active power distribution network, described system comprises:
Three-phase current test module, this module is carried out test to electric current to be detected and is obtained three-phase current signal i
a, i
b, i
cor voltage signal, and this test result is passed to three phase static coordinate to two-phase static coordinate conversion module;
Three phase static coordinate is to two-phase static coordinate conversion module, and this module receives the signal of three-phase current test module, and to described three-phase current signal i
a, i
b, i
cconvert, namely transform to two-phase static coordinate signal i from three phase static coordinate signal
α, i
β, and the signal that this conversion obtains is passed to two-phase static coordinate to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module;
Two-phase static coordinate is to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module, and this module receives two-phase static coordinate signal i
α, i
βafter, further this signal is converted, it is transformed to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates signal i from two-phase static coordinate signal
d, i
q, and pass to low-pass filter by converting the result obtained;
M-Acetyl chlorophosphonazo phase-locked loop circuit to be measured controls two-phase static coordinate to two synchronised m-Acetyl chlorophosphonazo to be measured frequency rotating coordinate transformation module, two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates to the phase-locking of two-phase static coordinate conversion module when signal converts;
Low-pass filter, respectively to described rotational coordinates signal i
d, i
qcarry out filtering, obtain DC component signal
this DC component signal
output to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates to two-phase static coordinate conversion module;
Two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates is to two-phase static coordinate conversion module, and this module is by described DC component signal
transform to two-phase static coordinate signal from two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates signal, and result is outputted to two-phase static coordinate to three phase static transformation of coordinates module;
Two-phase static coordinate is to three phase static transformation of coordinates module, this module proceeds to the conversion of three phase static coordinate signal to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates to the two-phase static coordinate signal that two-phase static coordinate conversion module obtains, and obtains the m-Acetyl chlorophosphonazo current i to be measured in three-phase current
af, i
bf, i
cf.
Preferably, described two-phase static coordinate is to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module, and concrete transform method is:
Preferably, described two-phase static coordinate is to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module, the component of measuring current space vector on two-phase static coordinate α β is converted on synchronous m-Acetyl chlorophosphonazo frequency rotational coordinates dq to be measured, turning to of synchronous m-Acetyl chlorophosphonazo frequency rotating coordinate system dq to be measured is identical with m-Acetyl chlorophosphonazo frequency phase sequence to be measured, the synchronous rotational speed of synchronous rotational speed corresponding to m-Acetyl chlorophosphonazo frequency to be measured.
Preferably, described three-phase current test module adopts and measures three-phase current signal i by current sensor
a, i
b, i
c.
Beneficial effect of the present invention is: the present invention is a kind of containing m-Acetyl chlorophosphonazo current detecting system to be measured in the three-phase distribution net of source, carries out synchronous m-Acetyl chlorophosphonazo frequency rotating coordinate transformation to be measured to tested curtage.Therefore, present system structure is simple, and operand is few, is specially adapted to the online m-Acetyl chlorophosphonazo filtering technique containing source three-phase distribution net power distribution network.
Accompanying drawing explanation
Fig. 1 is one embodiment of the invention systematic schematic diagram;
Fig. 2 is one embodiment of the invention job step process flow diagram.
Embodiment
Below in conjunction with drawings and Examples, the technical solution of the present invention is further explained, but following content is not intended to limit the scope of the invention.
As shown in Figure 1, for the systematic schematic diagram of one embodiment of the invention, described system comprises three-phase current test module 1, three phase static coordinate is to two-phase static coordinate conversion module 2, m-Acetyl chlorophosphonazo phase-locked loop circuit 3 to be measured, two-phase static coordinate to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module 4, low-pass filter 5 and 6, two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates is to two-phase static coordinate conversion module 7, and two-phase static coordinate is to three phase static transformation of coordinates module 8.
As shown in Figure 2, be the present embodiment system works flow chart of steps, be specially:
The first step: three-phase current test module 1 measures three-phase current i from electrical network
a, i
b, i
c, and this result is outputted to three phase static coordinate to two-phase static coordinate conversion module 2.
Containing source three-phase distribution net three-phase current by simple signals collecting be:
In formula, i
a, i
b, i
cfor the three-phase current of power distribution network, n is any non-positive integer being greater than zero; i
a, i
b, i
ccan be measured by current sensor.
Second step: the three-phase current i that three-phase current test module 1 obtains to two-phase static coordinate conversion module 2 by three phase static coordinate
a, i
b, i
ccarry out three phase static coordinate to convert to the conversion of two-phase static coordinate and abc → α β, obtain two-phase static coordinate signal i
α, i
β.And this result is outputted to two-phase static coordinate to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module 4.
Described three phase static coordinate is as follows to two-phase static coordinate conversion module 2 conversion process:
In this module, synchronous m-Acetyl chlorophosphonazo frequency rotating coordinate transformation to be measured is converted on synchronous m-Acetyl chlorophosphonazo frequency rotational coordinates dq to be measured by the component of measuring current space vector on two-phase static α β.Wherein
and n=f/50.Synchronous m-Acetyl chlorophosphonazo frequency rotating coordinate system dq to be measured, it turns to identical with m-Acetyl chlorophosphonazo frequency phase sequence to be measured, the synchronous rotational speed of synchronous rotational speed corresponding to m-Acetyl chlorophosphonazo frequency to be measured.Have according to General Transformations relation:
Dq → α β transform method is:
The transform method of α β → dq is:
The transformation matrix of its α β → dq
for direct transform matrix, dq → α β transformation matrix
for inverse-transform matrix.
3rd step: the two-phase static coordinate signal i that two-phase static coordinate will obtain to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module 4
α, i
βcarry out synchronous m-Acetyl chlorophosphonazo frequency rotational coordinates α β → dq to be measured to convert, obtain rotational coordinates i
d, i
q, and result is outputted to low-pass filter 5 and 6.
Described two-phase static coordinate in two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module 4, biphase current component i
α, i
βbe transformed to rotational coordinates i
d, i
q, process is:
In formula,
n is any non-integer being greater than zero.
4th step: low-pass filter 5 and 6 is by described rotational coordinates i
d, i
qfiltering obtains DC component respectively
and by this DC component
output to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates to two-phase static coordinate conversion module 7.
5th step: two synchronised m-Acetyl chlorophosphonazo to be measured frequency rotational coordinates to two-phase static coordinate conversion module 7 by described DC component signal
transform to two-phase static coordinate signal from two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates signal, and result is outputted to two-phase static coordinate to three phase static transformation of coordinates module 8.Two-phase static coordinate proceeds to three phase static coordinate signal conversion to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates to the two-phase static coordinate signal that two-phase static coordinate conversion module 7 obtains to three phase static transformation of coordinates module 8, obtains the m-Acetyl chlorophosphonazo current i to be measured in three-phase current
af, i
bf, i
cf.
In the present embodiment, two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates to two-phase static coordinate conversion module 7, two-phase static coordinate to three phase static transformation of coordinates module 8, complete by
carry out the m-Acetyl chlorophosphonazo current i to be measured that dq → α β → abc coordinate transform obtains in three-phase current
af, i
bf, i
cf.
In the present embodiment, m-Acetyl chlorophosphonazo phase-locked loop circuit 3 to be measured is for completing the automatic control that when two-phase static coordinate works to two synchronised m-Acetyl chlorophosphonazo to be measured frequency rotating coordinate transformation module 4 and two synchronised m-Acetyl chlorophosphonazo to be measured frequency rotational coordinates to two-phase static coordinate conversion module 7, two m-Acetyl chlorophosphonazo electrical signal phases to be measured are synchronous.
In the present embodiment, all can adopt hardware implementing with upper-part or module, wherein: three-phase current test module 1 can adopt current sensor, existing current testing circuit also can be adopted to realize.Each coordinate transformation module can adopt the logic combination circuit realizing above-mentioned corresponding function, also can adopt single-chip microcomputer, preferably, adopts Programmable Logic Device chip.
The present embodiment is based on m-Acetyl chlorophosphonazo synchronous coordinate to be measured rotational transform and low-pass filtering sampling, carry out inverse transformation again, this system is to very effective containing the m-Acetyl chlorophosphonazo voltage of source three-phase distribution net, electric current on-line checkingi, structure is simple, is the comparatively easy system that dynamic and static m-Acetyl chlorophosphonazo detects and m-Acetyl chlorophosphonazo is eliminated.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (1)
1. a m-Acetyl chlorophosphonazo detection system for three-phase active power distribution network, is characterized in that, described system comprises:
Three-phase current test module (1), this module is tested electric current to be detected, obtains three-phase current signal i
a, i
b, i
c, and this test result is passed to three phase static coordinate to two-phase static coordinate conversion module (2);
Three phase static coordinate receives the signal of three-phase current test module (1) to two-phase static coordinate conversion module (2), and to described three-phase current signal i
a, i
b, i
cconvert, three phase static coordinate signal is transformed to two-phase static coordinate signal i
α, i
β, and the signal that this conversion obtains is passed to two-phase static coordinate to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module (4);
M-Acetyl chlorophosphonazo phase-locked loop circuit (3) to be measured, controls two-phase static coordinate to two synchronised m-Acetyl chlorophosphonazo to be measured frequency rotating coordinate transformation module (4), two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates to two-phase static coordinate conversion module (7) phase-locking when signal converts;
Two-phase static coordinate is to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module (4), and this module receives two-phase static coordinate signal i
α, i
βafter, further this signal is converted, it is transformed to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates signal i from two-phase static coordinate signal
d, i
q, and pass to low-pass filter (5) and (6) by converting the result obtained;
Low-pass filter (5) and (6), two low-pass filters (5) and (6) are respectively to described rotational coordinates signal i
d, i
qcarry out filtering, obtain DC component signal
this DC component signal
output to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates to two-phase static coordinate conversion module (7);
Two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates is to two-phase static coordinate conversion module (7), and this module is by described DC component signal
transform to two-phase static coordinate signal from two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates signal, and result is outputted to two-phase static coordinate to three phase static transformation of coordinates module (8);
Two-phase static coordinate is to three phase static transformation of coordinates module (8), this module proceeds to the conversion of three phase static coordinate signal to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotational coordinates to the two-phase static coordinate signal that two-phase static coordinate conversion module (7) obtains, and obtains the m-Acetyl chlorophosphonazo current i to be measured in three-phase current
af, i
bf, i
cf;
Described two-phase static coordinate is to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module (4), and concrete transform method is:
for m-Acetyl chlorophosphonazo number of times, for being greater than the non-integer of zero;
Described two-phase static coordinate is to two synchronised m-Acetyl chlorophosphonazo frequency to be measured rotating coordinate transformation module (4), the component of measuring current space vector on two-phase static coordinate α β is converted on synchronous m-Acetyl chlorophosphonazo frequency rotational coordinates dq to be measured, turning to of synchronous m-Acetyl chlorophosphonazo frequency rotating coordinate system dq to be measured is identical with m-Acetyl chlorophosphonazo frequency phase sequence to be measured, the synchronous rotational speed of synchronous rotational speed corresponding to m-Acetyl chlorophosphonazo frequency to be measured.
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| CN103364618B (en) * | 2013-07-26 | 2015-10-28 | 武汉大学 | A kind of HVDC (High Voltage Direct Current) transmission system DC side harmonics voltage measurement method |
| CN103474994B (en) * | 2013-07-30 | 2015-08-26 | 华北电力大学 | Multiterminal Unified Power Quality Controller DC voltage control device and method |
| CN104181390A (en) * | 2014-08-18 | 2014-12-03 | 信元瑞电气有限公司 | Harmonic detection method based on zero-sequence current separation of three-phase four-wire system |
| CN104502705B (en) * | 2014-12-04 | 2017-09-29 | 西安理工大学 | Suitable for line voltage distortion and unbalanced no phase-locked loop rotating vector detection method |
| CN113938073A (en) * | 2021-10-09 | 2022-01-14 | 广东汇天航空航天科技有限公司 | Motor position estimation method and device, controller, electric automobile and aerocar |
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|---|---|---|---|---|
| CN101893651A (en) * | 2010-06-18 | 2010-11-24 | 上海理工大学 | Method for detecting positive sequence, negative sequence, idle and harmonic currents of power supply system |
| CN102221639A (en) * | 2011-04-06 | 2011-10-19 | 国电南瑞科技股份有限公司 | Positive and negative sequence current real-time detection method |
| CN102590646A (en) * | 2012-02-15 | 2012-07-18 | 上海大学 | Method for detecting positive sequence, negative sequence and harmonic current based on phase sequence filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893651A (en) * | 2010-06-18 | 2010-11-24 | 上海理工大学 | Method for detecting positive sequence, negative sequence, idle and harmonic currents of power supply system |
| CN102221639A (en) * | 2011-04-06 | 2011-10-19 | 国电南瑞科技股份有限公司 | Positive and negative sequence current real-time detection method |
| CN102590646A (en) * | 2012-02-15 | 2012-07-18 | 上海大学 | Method for detecting positive sequence, negative sequence and harmonic current based on phase sequence filter |
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