CN202583297U - Measurement system for frequency voltage stability control device - Google Patents
Measurement system for frequency voltage stability control device Download PDFInfo
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- CN202583297U CN202583297U CN 201220143775 CN201220143775U CN202583297U CN 202583297 U CN202583297 U CN 202583297U CN 201220143775 CN201220143775 CN 201220143775 CN 201220143775 U CN201220143775 U CN 201220143775U CN 202583297 U CN202583297 U CN 202583297U
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- voltage
- control device
- buses
- frequency
- measurement system
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Abstract
The utility model discloses a measurement system for a frequency voltage stability control device. The measurement system comprises two buses and a frequency voltage stability control device, wherein the two buses are connected through a section switch; wirings are led out from the two buses respectively and are connected in series with voltage inductors respectively and then are connected with the signal input terminals of the frequency voltage stability control device respectively. The measurement system in simple and reliable in circuit structure, convenient for debugging, fast in response, accurate in measurement data, and is high in precision. When voltage decreases due to reactive power insufficiency in a power system, the measurement system automatically determines whether the power system is in a normal condition on the basis of the voltages of the buses, gives alarm signals, and thus the measurement system is very convenient to use.
Description
Technical field
The utility model relates to voltage to frequency stabilization control device field, specifically is a kind of measuring system of UFV-208A type voltage to frequency stabilization control device.
Background technology
UFV-208A type voltage to frequency stabilization control device is a kind of as the voltage to frequency stabilization control device, has functions such as low frequency judgement, low pressure judgement, overfrequency judgement, overvoltage judgement.UFV-208A type voltage to frequency stabilization control device basic model is mainly used in low-frequency low-voltage load shedding, also can be used for low frequency off-the-line and low pressure off-the-line, can measure two busbar voltages simultaneously.
At present, existing UFV-208A type voltage to frequency stabilization control device when measuring two bus 1B, 2B voltage, its wiring construction more complicated, inefficiency can not well satisfy the demands.
The utility model content
The purpose of the utility model provides a kind of measuring system of voltage to frequency stabilization control device, simplifies wiring construction, improves accuracy and the efficient measured.
The technical scheme of the utility model is following:
A kind of measuring system of voltage to frequency stabilization control device; Include two buses and voltage to frequency and stablize controller; It is characterized in that: link to each other through block switch between described two buses; From two buses, draw wiring respectively, and insert the signal input part that voltage to frequency is stablized controller respectively after being connected in series voltage transformer (VT) respectively.
The measuring system of described voltage to frequency stabilization control device is characterized in that: described two buses are the bare conductor or the twisted wire of rectangle or round section.
The beneficial effect of the utility model:
The utility model circuit structure rationally, reliable, debug easyly, reaction velocity is fast; Measurement data is accurate; Precision is high, and when electric system caused that owing to reactive power deficiency voltage descends, the utility model judged according to the voltage of detection bus whether it is normal automatically; And send alarm signal, use very convenient.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Referring to Fig. 1; A kind of measuring system of voltage to frequency stabilization control device; Include two bus 1B, 2B and voltage to frequencies and stablize controller 1; Link to each other through block switch DL between two bus 1B, the 2B, from two bus 1B, 2B is last draws wiring respectively, and insert the signal input part that voltage to frequency is stablized controller 1 respectively after being connected in series voltage transformer (VT) 1TV, 2TV respectively.
In the utility model, two bus 1B, 2B are the bare conductor or the twisted wire of rectangle or round section.
Below in conjunction with accompanying drawing the utility model is further described:
Two bus 1B, the three-phase alternating voltage UAB of 2B, UBC, UCA that voltage to frequency is stablized 1 pair of input of controller sample, and the sampling period is 0.833ms, i.e. a power frequency period 24 points of sampling.Voltage magnitude adopts filtering algorithm, and frequency values adopts hardware in acquisition to add the software checking algorithm.Respectively two groups of voltages are calculated, obtain two groups of voltages and judge.Voltage change ratio and frequency change rate all adopt the cycle of 100ms to carry out continuously, and formula is following:
dU/dt?≌?10·[Uk－U(k-0.1”)] ％?UN/s
df/dt?≌?10·[fk－f(k-0.1”)] Hz/s
1, be in when closing as block switch DL, two bus 1B, 2B are a system (no matter two bus 1B, 2B electric pressure whether consistent), so the frequency values of this system is identical.
(1), when two bus 1B, 2B voltage all just often, device at first selects for use bus 1B voltage, frequency to judge, if satisfy operation condition, then judges through bus 2B voltage, frequency again and confirms.Voltage, frequency that voltage, the frequency of judging got same bus.
(2), disappear or during broken string, voltage to frequency stablize controller 1 and is selected for use another root busbar voltage to judge automatically, and delays time and send the alarm signal of broken string when a certain busbar voltage among two bus 1B, the 2B.
(3), as two bus 1B, when 2B voltage is all undesired, voltage to frequency is stablized controller 1 locking outlet and issue device locking alarm signal.
2, when block switch DL is in the branch position, two bus 1B, 2B are two systems (no matter two bus 1B, 2B electric pressure whether consistent).
(1), when two bus 1B, 2B voltage all just often, device is to bus 1B, voltage, the frequency of bus 2B judge respectively, if satisfy operation condition, then excise this root bus with outlet loop.Voltage, frequency that voltage, the frequency of judging got same bus.
(2), disappear or during broken string when a certain busbar voltage among two bus 1B, the 2B, the pairing outlet loop locking of this root bus, the alarm signal of this root bus broken string is sent in a certain bus time-delay in two bus 1B, 2B.
(3), as two bus 1B, when 2B voltage is all undesired, a certain bus locking outlet in two bus 1B, 2B, and send the locking alarm signal.
Claims (2)
1. the measuring system of a voltage to frequency stabilization control device; Include two buses and voltage to frequency and stablize controller; It is characterized in that: link to each other through block switch between described two buses; From two buses, draw wiring respectively, and insert the signal input part that voltage to frequency is stablized controller respectively after being connected in series voltage transformer (VT) respectively.
2. the measuring system of voltage to frequency stabilization control device according to claim 1 is characterized in that: described two buses are the bare conductor or the twisted wire of rectangle or round section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220143775 CN202583297U (en) | 2012-04-06 | 2012-04-06 | Measurement system for frequency voltage stability control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220143775 CN202583297U (en) | 2012-04-06 | 2012-04-06 | Measurement system for frequency voltage stability control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202583297U true CN202583297U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220143775 Expired - Fee Related CN202583297U (en) | 2012-04-06 | 2012-04-06 | Measurement system for frequency voltage stability control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202583297U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833887A (en) * | 2015-05-21 | 2015-08-12 | 中国大唐集团科学技术研究院有限公司华东分公司 | Method for assessing bus voltage stability of power plant based on short-circuit test |
-
2012
- 2012-04-06 CN CN 201220143775 patent/CN202583297U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833887A (en) * | 2015-05-21 | 2015-08-12 | 中国大唐集团科学技术研究院有限公司华东分公司 | Method for assessing bus voltage stability of power plant based on short-circuit test |
| CN104833887B (en) * | 2015-05-21 | 2017-08-01 | 中国大唐集团科学技术研究院有限公司华东分公司 | Power plant busbar voltage stability assessment method based on short circuit experiment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130406 |