CN203164302U - Double-end method positive sequence admittance measurement circuit structure - Google Patents
Double-end method positive sequence admittance measurement circuit structure Download PDFInfo
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- CN203164302U CN203164302U CN 201320149316 CN201320149316U CN203164302U CN 203164302 U CN203164302 U CN 203164302U CN 201320149316 CN201320149316 CN 201320149316 CN 201320149316 U CN201320149316 U CN 201320149316U CN 203164302 U CN203164302 U CN 203164302U
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- parallel circuit
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- positive sequence
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Abstract
The utility model relates to a double-end method positive sequence admittance measurement circuit structure. The circuit structure comprises a parallel circuit, a testing power supply and measuring devices. The head end of the parallel circuit is connected with the testing power supply while the tail end is hung in the air. There are two measuring devices respectively arranged on the head end and the tail end of the parallel circuit. The measuring device arranged on the head end of the parallel circuit is in induction connection with the parallel circuit through a connecting circuit and further connected with the parallel circuit through a transformer. The measuring device arranged on the tail end of the parallel circuit is connected with the parallel circuit through a transformer. Compared with the prior art, the circuit structure makes the tail end of the parallel circuit opened in a three-phase way and further exerts a three-phase positive sequence voltage on the head end. Waves are measured and recorded synchronously on the head end and the tail end. The head end voltage, the head end current, the tail end voltage and the frequency are further measured. The fundamental wave positive sequence components of corresponding voltages and currents are calculated.
Description
Technical field
The utility model relates to a kind of circuit structure, especially relates to a kind of both-end method positive sequence admittance measurement circuit structure.
Background technology
At present, both-end method positive sequence impedance is tested the preceding following situation that must at first understand test line: the situation of joint using circuit and parallel circuit in line length, electric pressure, lead and ground wire model, circuit corridor etc.Must measure line influence voltage and ground connection induction current before test, be convenient to take suitable interference protection measure, measuring must have insulation course or hang the 5000V in the time of tolerating insulation measurement or 10000V voltage with para tape with lead.
In order to guarantee the accuracy of parallel circuit power frequency parameter measuring, if induced voltage surpasses 1000V, then need substep to take to reduce accordingly the measure of induced voltage, measure induced voltage, the induced electricity flow valuve line frequency analysis of spectrum of going forward side by side then.
It is a kind of perfect condition that the test line related " has a power failure " fully, the inductive disturbance of having avoided parallel circuit that parameter testing between single line parameter and line is formed fully, the range of choice of its power frequency parameter test method is wideer, both can select conventional method for use, the generality that causes for All other routes is disturbed, and can utilize phase inversion method, phase-shifting method to handle and (consider that said method uses comparatively rich experience, the testing tool of maturation in electrical network, and the technical manual guidance, should preferentially select for use); Also can select method of addition and alien frequencies method for use, bring into play it in the advantage of aspects such as accuracy, test convenience.For the parallel circuit of long distance, for avoiding distribution parameter to the influence of test result, the method that should adopt both-end to test simultaneously.
The utility model content
The purpose of this utility model is exactly to provide a kind of test result accurate for the defective that overcomes above-mentioned prior art existence, easy-to-use both-end method positive sequence admittance measurement circuit structure.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of both-end method positive sequence admittance measurement circuit structure, this circuit structure comprises parallel circuit, experiment power supply, measurement mechanism,
Described parallel circuit head end is connected with experiment power supply, and is terminal unsettled,
Described measurement mechanism is provided with two, be separately positioned on head end and the end of parallel circuit, being arranged on parallel circuit head end measurement mechanism is connected with the parallel circuit induction through connecting circuit, and be connected with parallel circuit through transformer, the measurement mechanism that is arranged on the parallel circuit end is connected with parallel circuit through transformer.
Described measurement mechanism receives synchronizing signal.
The main coil of described transformer is connected with parallel circuit, and secondary coil is connected with measurement mechanism, the iron core grounding that arranges between main coil and secondary coil.
Compared with prior art, the utility model is simple in structure, and is easy to use, the terminal three-phase open circuit of parallel circuit applies the three-phase positive sequence voltage at head end, first and last end synchro measure record ripple, measure head end voltage, head end electric current, terminal voltage, frequency, calculate relevant voltage current first harmonics positive-sequence component.Should rise to pilot system maximum voltage Umax generally speaking, improve signal to noise ratio (S/N ratio) with the capacity that at utmost utilizes testing equipment.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure, 1 is that experiment power supply, 2 is that parallel circuit, 3 is that proving installation, 4 is that transformer, 5 is connecting circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
A kind of both-end method positive sequence admittance measurement circuit structure, its structure as shown in Figure 1, this circuit structure comprises experiment power supply 1, parallel circuit 2, measurement mechanism 3, transformer 4 and connecting circuit 5, the head end of parallel circuit 2 is connected with experiment power supply 1, and is terminal unsettled.The measurement mechanism 3 that adopts is provided with two, is separately positioned on head end and the end of parallel circuit 2, and measurement mechanism 3 can receive synchronizing signal.The measurement mechanism 3 that is arranged on parallel circuit 2 head ends is connected with parallel circuit 2 inductions through connecting circuit 5, also be connected with parallel circuit 1 by transformer 4 in addition, the main coil of transformer 4 is connected with parallel circuit, secondary coil is connected with measurement mechanism, the iron core grounding that arranges between main coil and secondary coil.The measurement mechanism 3 that is arranged on parallel circuit 2 ends is connected with parallel circuit 2 through transformer 4.
The utility model with the terminal three-phase open circuit of parallel circuit 2, applies the three-phase positive sequence voltage at head end in use, and first and last end synchro measure record ripple is measured head end voltage, head end electric current, terminal voltage, frequency, calculates relevant voltage current first harmonics positive-sequence component.Should rise to pilot system maximum voltage Umax generally speaking, improve signal to noise ratio (S/N ratio) with the capacity that at utmost utilizes testing equipment.
Claims (3)
1. a both-end method positive sequence admittance measurement circuit structure is characterized in that this circuit structure comprises parallel circuit, experiment power supply, measurement mechanism,
Described parallel circuit head end is connected with experiment power supply, and is terminal unsettled,
Described measurement mechanism is provided with two, be separately positioned on head end and the end of parallel circuit, being arranged on parallel circuit head end measurement mechanism is connected with the parallel circuit induction through connecting circuit, and be connected with parallel circuit through transformer, the measurement mechanism that is arranged on the parallel circuit end is connected with parallel circuit through transformer.
2. a kind of both-end method positive sequence admittance measurement circuit structure according to claim 1 is characterized in that, described measurement mechanism receives synchronizing signal.
3. a kind of both-end method positive sequence admittance measurement circuit structure according to claim 1 is characterized in that the main coil of described transformer is connected with parallel circuit, and secondary coil is connected with measurement mechanism, the iron core grounding that arranges between main coil and secondary coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149316 CN203164302U (en) | 2013-03-28 | 2013-03-28 | Double-end method positive sequence admittance measurement circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149316 CN203164302U (en) | 2013-03-28 | 2013-03-28 | Double-end method positive sequence admittance measurement circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203164302U true CN203164302U (en) | 2013-08-28 |
Family
ID=49025479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320149316 Expired - Lifetime CN203164302U (en) | 2013-03-28 | 2013-03-28 | Double-end method positive sequence admittance measurement circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203164302U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459330A (en) * | 2014-12-25 | 2015-03-25 | 国家电网公司 | High-voltage transmission line zero-sequence impedance measuring circuit and method |
-
2013
- 2013-03-28 CN CN 201320149316 patent/CN203164302U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459330A (en) * | 2014-12-25 | 2015-03-25 | 国家电网公司 | High-voltage transmission line zero-sequence impedance measuring circuit and method |
| CN104459330B (en) * | 2014-12-25 | 2017-04-12 | 国家电网公司 | High-voltage transmission line zero-sequence impedance measuring circuit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |