CN205374594U - Developments reactive power collection system - Google Patents
Developments reactive power collection system Download PDFInfo
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- CN205374594U CN205374594U CN201521128440.1U CN201521128440U CN205374594U CN 205374594 U CN205374594 U CN 205374594U CN 201521128440 U CN201521128440 U CN 201521128440U CN 205374594 U CN205374594 U CN 205374594U
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Abstract
The utility model relates to a developments reactive power collection system, including digital signal processor, grid voltage detection circuitry, load current detection circuitry, phase locking frequency doubling circuit, keyboard interface circuit, protection circuit module, communication circuit, man -machine interaction module, digital signal processor's input is connected with grid voltage detection circuitry, load current detection circuitry, phase locking frequency doubling circuit and keyboard interface circuit respectively, and digital signal processor's output is connected with protection circuit module, communication circuit, man -machine interaction module respectively. The device can acquire power grid operation's status data accurate, in real time, can provide objective foundation for control reactive compensation equipment.
Description
Technical field
This utility model relates to Allocation transformer technology, is specifically related to a kind of dynamic reactive power harvester.
Background technology
Reactive power compensation acts the effect of the power factor improving electrical network in power supply system, and it can reduce the loss of supply transformer and conveying circuit, improves power supplying efficiency, improves power supply environment.So reactive power compensation device is in an indispensable very important position in power supply system.Reasonably select compensation device, it is possible to accomplish to reduce to greatest extent the loss of electrical network, make power grid quality improve.Otherwise, as selected or improper use, it is possible to cause the factors such as electric power system, voltage pulsation, harmonic wave increase.
The control of reactive power compensating apparatus needs accurately, obtains operation of power networks status data in real time, thinks that control reactive-load compensation equipment provides objective basis.Existing reactive power harvester can not obtain operation of power networks status data accurately, in real time, thus can not for controlling reactive-load compensation equipment offer objective basis.
Summary of the invention
For above-mentioned prior art Problems existing, this utility model provides a kind of dynamic reactive power harvester, and this device can obtain the status data of operation of power networks accurately, in real time, can for controlling reactive-load compensation equipment offer objective basis.
To achieve these goals; this utility model one dynamic reactive power harvester; including digital signal processor, power grid voltage detection circuit, load current detection circuit, phase-locking frequency multiplication circuit, keyboard interface circuit, protection circuit module, communicating circuit, human-computer interaction module; the input of digital signal processor is connected with power grid voltage detection circuit, load current detection circuit, phase-locking frequency multiplication circuit and keyboard interface circuit respectively, and the outfan of digital signal processor is connected with protection circuit module, communicating circuit, human-computer interaction module respectively.
Described power grid voltage detection circuit is made up of Hall voltage transformer, voltage amplifier circuit, voltage signal conditioning circuit, filter circuit and the A/D convertor circuit being linked in sequence.
Described load current detection circuit is made up of Hall current transformer, preamplifier, low pass filter, current signal conditioning circuit, signal generating circuit and the A/D convertor circuit being linked in sequence.
Described phase-locking frequency multiplication circuit is made up of the zero-cross triggering circuit being linked in sequence, phase-locked loop circuit, frequency multiplier circuit and capturing unit.
Described keyboard interface circuit is made up of the Phototube Coupling input circuit being linked in sequence, signal deteching circuit and Phototube Coupling output circuit.
This utility model is by detecting the instantaneous value of electrical network three-phase voltage, load current, grid side phase place is detected according to phase-locked loop circuit, and export through A/D convertor circuit, it is passed in digital signal processor, it is achieved real-time, detection and the calculating exactly to reactive power；It is provided externally with keyboard interface circuit, the reactive power data that namely can detect that under different conditions by changing parameter to arrange；Device outfan is provided with protection circuit module, communicating circuit and human-computer interaction module, can monitor the running status of reactive power compensator in real time, effectively, accurately and measure service data, providing data reliable, objective for Zong Kong center.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is the theory diagram of power grid voltage detection circuit in this utility model；
Fig. 3 is the theory diagram of load current detection circuit in this utility model；
Fig. 4 is the theory diagram of phase-locking frequency multiplication circuit in this utility model；
Fig. 5 is the theory diagram of keyboard interface circuit in this utility model.
Detailed description of the invention
The utility model is described in further detail below.
As shown in Figure 1; a kind of dynamic reactive power harvester; including digital signal processor, power grid voltage detection circuit, load current detection circuit, phase-locking frequency multiplication circuit, keyboard interface circuit, protection circuit module, communicating circuit, human-computer interaction module; the input of digital signal processor is connected with power grid voltage detection circuit, load current detection circuit, phase-locking frequency multiplication circuit and keyboard interface circuit respectively, and the outfan of digital signal processor is connected with protection circuit module, communicating circuit, human-computer interaction module respectively.Digital signal processor has been used for the process to sampled signal and has calculated required reactive power in real time in conjunction with reactive power algorithm, and digital signal processor is preferably the TMS32028335 of TI company and processes chip.
As in figure 2 it is shown, described power grid voltage detection circuit is made up of Hall voltage transformer, voltage amplifier circuit, voltage signal conditioning circuit, filter circuit and the A/D convertor circuit being linked in sequence.High-voltage signal is converted to low-voltage signal by Hall voltage transformer, then the amplification of step voltage amplifying circuit and voltage seat number modulate circuit and adjustment so that it is becomes the receptible signal of A/D convertor circuit, and enters in digital signal processor.The model of Hall voltage transformer preferentially adopts LV100-800.
As it is shown on figure 3, described load current detection circuit is made up of Hall current transformer, preamplifier, low pass filter, current signal conditioning circuit, signal generating circuit and the A/D convertor circuit being linked in sequence.The current signal that Hall current transformer detects is filtered then through low pass filter, current signal conditioning circuit, adjusts after preamplifier amplifies so that it is becomes the receptible signal of A/D convertor circuit, and enters in digital signal processor.The model of Hall current transformer preferentially adopts LA100-P/SP50.
In A/D convertor circuit, acp chip preferentially adopts ADS7869 chip.
As shown in Figure 4, described phase-locking frequency multiplication circuit is made up of the zero-cross triggering circuit being linked in sequence, phase-locked loop circuit, frequency multiplier circuit and capturing unit.When in alternating current circuit, waveform is from just half circumference negative half period conversion, phase-locked loop circuit is outputed signal to through zero cross fired electric circuit inspection, phase-locked loop circuit realizes keeping Tong Bu with power network signal, output signal is carried out frequency multiplication by frequency multiplier circuit simultaneously and form high-frequency impulse row, and as the input signal of capturing unit, eliminate the error because mains frequency instability causes with this.The acp chip of phase-locked loop circuit preferentially adopts CD4046.The acp chip of frequency multiplier circuit preferentially adopts CD4042.
As it is shown in figure 5, described keyboard interface circuit is made up of the Phototube Coupling input circuit being linked in sequence, signal deteching circuit and Phototube Coupling output circuit.Keyboard interface circuit mainly controls to carry out parameter setting according to the input of keyboard, and obtains the reactive power collection under different conditions.In keyboard interface circuit, Phototube Coupling processes the chip that chip preferentially adopts model to be HCPL-2531.
This utility model is by detecting electrical network three-phase voltage, the instantaneous value of load current, grid side phase place is detected according to phase-locked loop circuit, and export through A/D convertor circuit, it is passed in digital signal processor, realize real-time to reactive power, detection and calculating exactly, reactive power can be quickly calculated by simple reactive power computing, adopt high-precision signal sampling and the objective computational methods of science, ensure that the accurately objective of result of calculation, the running state data of detailed and reliable reactive-load compensation equipment can be provided for Zong Kong center, objective basis is provided for controlling reactive-load compensation equipment.It is provided externally with keyboard interface circuit, the reactive power data that namely can detect that under different conditions by changing parameter to arrange；Device outfan is provided with protection circuit module, communicating circuit and human-computer interaction module, can monitor the running status of reactive power compensator in real time, effectively, accurately and measure service data, providing data reliable, objective for Zong Kong center.
This utility model has the advantage that accuracy of detection height, the speed of service are fast, it is possible to fully meet precision and real-time requirement.Adopting Digital Signal Processing, algorithm is simple, can quickly calculate a large amount of reactive power numerical value, it is achieved that calculate the purpose of reactive power rapidly and accurately, it is possible to be widely used in the scene with the three-phase equilibrium load of reactive power fluctuation.
Claims (5)
1. a dynamic reactive power harvester; it is characterized in that; including digital signal processor, power grid voltage detection circuit, load current detection circuit, phase-locking frequency multiplication circuit, keyboard interface circuit, protection circuit module, communicating circuit, human-computer interaction module; the input of digital signal processor is connected with power grid voltage detection circuit, load current detection circuit, phase-locking frequency multiplication circuit and keyboard interface circuit respectively, and the outfan of digital signal processor is connected with protection circuit module, communicating circuit, human-computer interaction module respectively.
2. a kind of dynamic reactive power harvester according to claim 1, it is characterized in that, described power grid voltage detection circuit is made up of Hall voltage transformer, voltage amplifier circuit, voltage signal conditioning circuit, filter circuit and the A/D convertor circuit being linked in sequence.
3. a kind of dynamic reactive power harvester according to claim 1 and 2, it is characterized in that, described load current detection circuit is made up of Hall current transformer, preamplifier, low pass filter, current signal conditioning circuit, signal generating circuit and the A/D convertor circuit being linked in sequence.
4. a kind of dynamic reactive power harvester according to claim 3, it is characterised in that described phase-locking frequency multiplication circuit is made up of the zero-cross triggering circuit being linked in sequence, phase-locked loop circuit, frequency multiplier circuit and capturing unit.
5. a kind of dynamic reactive power harvester according to claim 4, it is characterised in that described keyboard interface circuit is made up of the Phototube Coupling input circuit being linked in sequence, signal deteching circuit and Phototube Coupling output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521128440.1U CN205374594U (en) | 2015-12-30 | 2015-12-30 | Developments reactive power collection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521128440.1U CN205374594U (en) | 2015-12-30 | 2015-12-30 | Developments reactive power collection system |
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| CN205374594U true CN205374594U (en) | 2016-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107263A (en) * | 2017-11-14 | 2018-06-01 | 武汉市路灯管理服务中心 | A kind of public lighting circuit load attribute data acquisition device and determination methods |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107263A (en) * | 2017-11-14 | 2018-06-01 | 武汉市路灯管理服务中心 | A kind of public lighting circuit load attribute data acquisition device and determination methods |
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