CN209471195U - A kind of power grid simulation source system - Google Patents

Abstract

The utility model discloses a kind of power grid simulation source systems, including power grid simulation source；The utility model is used by power grid simulation source, current detection module, voltage detection module, the power grid simulation source system of central controller composition, dynamic power factor compensation is carried out to sample by power factor compensation circuit, the adaptability for making it possible to examine sample to power supply grid, realize the detection to the normal abnormal characteristic of power supply grid, and it is controlled by the harmonic voltage that PWM controller exports multi-frequency superposition to three phase harmonic generation module simultaneously, the independent control of PWM rectification and inversion is reached, further ensure the accuracy and reliability of control logic, realize the accurate control of overtone order and amplitude, reduce the security risk in system operation；The system has many advantages, such as strong antijamming capability, operation stability are high, data test is accurate and reliable, the speed of service is fast, work efficiency is high, wiring is simple and operation is convenient, operational process is safe.

Description

A kind of power grid simulation source system

Technical field

The utility model relates to a kind of a kind of simulations of the power grid of power quality detection system more particularly to Power Quality Detection Source system.

Background technique

In recent years, with the rapid development of electric power network technique, diversification power demand continues to increase, intermittent distribution energy A large amount of accesses in source, cause the complexity of user side equipment higher and higher, and there are many power quality problems for power supply grid, and Inevitably there is component aging, failure, by adverse circumstances during long-play in power quality detection system equipment Interference causes system equipment failure rate to rise, accuracy of measurement decline, or generates invalid abnormal data, and system equipment is whole Reliability reduces, so that three-phase imbalance problem, mains by harmonics problem also become to get worse.Currently, existing power grid The shortcomings that simulation source system is primarily present is: on the one hand, due to lacking effective power factor compensation mechanism or power factor Compensation setting is unreasonable, undercompensation phenomenon and overcompensation phenomenon is easy to produce, prevent system equipment is from playing due function Can, electrical equipment is damaged, or even jeopardize system equipment and other electricity consumption installation securities, greatly reduce system equipment uses the longevity Life；On the other hand, since Three-phase harmonic source and reactive compensation design are unreasonable, nonlinear-load, the impact of network system are accessed The problems such as property load is easy to produce the convex liter of voltage fluctuation flickering, voltage sag and serious three-phase imbalance, cannot ensure to control The accuracy and reliability of logic processed, it is difficult to the accurate control of overtone order and amplitude is realized, so that low-voltage electric energy quality testing System equipment is easy to appear abnormal operational conditions, even result in the security risks such as system jam, fire and cannot be timely Alarm；Additionally, there may be design it is many and diverse, parallel extended ability is poor, operation stability is lower, data test accuracy it is lower with And the problems such as wiring is cumbersome and complicated for operation, operational process is dangerous.

Utility model content

The technical issues of the utility model solves is to overcome the deficiencies of existing technologies, and provides a kind of power grid simulation source system, The power grid simulation source system is made of power grid simulation source, current detection module, voltage detection module, central controller, passes through function Rate factor compensation circuit carries out dynamic power factor compensation to sample, makes it possible to that sample is examined to fit power supply grid Should be able to power, realize the detection to the normal abnormal characteristic of power supply grid, and module is occurred to three phase harmonic by PWM controller The harmonic voltage for exporting multi-frequency superposition simultaneously is controlled, and has reached the independent control of PWM rectification and inversion, further really The accuracy and reliability for having protected control logic, realizes the accurate control of overtone order and amplitude, and the system of reducing was run Security risk in journey.

In order to solve the above-mentioned technical problem, the utility model is addressed by following technical proposals:

A kind of power grid simulation source system, including be connected on power supply grid power grid simulation source, to power grid simulation source carry out The current detection module of current sample carries out the voltage detection module of voltage sample to power grid simulation source, controls system Central controller, the host computer that is connect with central controller, sample connect by the first transformer with power grid simulation source, Current detection module, voltage detection module are connected on central controller by power factor compensation circuit, power grid simulation Source, the first transformer, sample are connect with central controller；Power factor compensation circuit includes the pressure stabilizing electricity interconnected Source, power factor compensating main circuit, pwm pulse modulation and drive control circuit, phase current voltage detecting and comparison circuit, surely Voltage source is circuit power supply, and power factor compensating main circuit includes the first filter inductance, the second filter inductance, the first filter capacitor Device, the second filter condenser, third filter condenser, charge and discharge capacitance device, absorption capacitor, coupling capacitor, the second transformation Device, current sense resistor, first voltage detection resistance, second voltage detection resistance, the first power switch component, the second power are opened Close element, one end of the first filter inductance and the input terminal L connection of alternating current, the other end of the first filter inductance and charge and discharge electricity One end connection of container, first voltage detection resistance, current sense resistor, the other end of charge and discharge capacitance device and the second transformer Armature winding N1 one end connection, the other end of the armature winding N1 of the second transformer is first with the first power switch in parallel The anode of part and the connection of the second power switch component, the cathode of the first power switch component and the second power switch component is connected to The cathode and driving stage of the common end N of alternating current, the first power switch component and the second power switch component are connected respectively to PWM The first driving circuit and isolated drive circuit of impulse modulation and drive control circuit；One end of first filter condenser is connected to The input terminal L of alternating current, the common end N connection of the other end and alternating current of the first filter condenser；Second filter condenser One end is connect with the first filter inductance, and the other end of the second filter condenser is connected on the common end N of alternating current；First voltage The other end of detection resistance is electric with the voltage detecting circuit of phase current voltage detecting and comparison circuit, second voltage detection respectively One end of resistance connects, and the other end of second voltage detection resistance is connected to the common end N of alternating current；Current sense resistor it is another End is connected to the output end LM of alternating current by the second filter inductance；The secondary windings N2 of absorption capacitor and the second transformer is simultaneously The one of connection, one end of absorption capacitor and the output end LM connection of alternating current, the other end of absorption capacitor and coupling capacitor End connection, the other end of coupling capacitor are connected to the common end N of alternating current；One end of third filter condenser, sample Connect respectively with the output end LM of alternating current, third filter condenser, sample the other end be connected respectively to alternating current Common end N.Wherein, it is defeated in the input terminal L and common end N of power factor compensating main circuit when power factor compensation circuit works Enter alternating current AC, alternating current AC is supplied to charge and discharge by the first filter condenser, the first filter inductance, the second filter condenser The circuit that capacitor, the armature winding N1 of the second transformer, the first power switch component, the second power switch component form, then Sample is supplied after the second filter inductance and the filtering of third filter condenser by current sense resistor；Pass through function The setting of rate factor compensation circuit enables power factor to reach 0.95, and harmonic current content is lower than 3%FS, to power supply grid Interference it is smaller.

Specifically, the voltage detecting circuit of phase current voltage detecting and comparison circuit is via power factor compensating main circuit After interior first voltage detection resistance and second voltage detection resistance partial pressure, the end voltage of sample is detected；Electricity Current detection circuit flows through the electric current of sample by current sense resistor detection, then at the voltage and current waveform that will test It after reason, is transmitted to electric current and is compared with voltage comparator circuit, pwm pulse modulation and drive control are controlled by control voltage Pwm pulse modulation circuit control driving circuit and isolated drive circuit in circuit, respectively to the first power switch component and the Two power switch components carry out switch control；Phase detecting circuit handles it to the voltage waveform that voltage detecting circuit detects Afterwards, it is transmitted to pwm pulse modulation and the phase and automatic power factor control circuit in drive control circuit, by phase and certainly Dynamic power factor control circuit controls the first power by pwm pulse modulation circuit, the first driving circuit and isolated drive circuit The on-off of switch element and the second power switch component sequence is right within the 0- pi/2 period by the armature winding N1 of the second transformer Charge and discharge capacitance device carries out pulse charging, carries out pulsed discharge to charge and discharge capacitance device within -2 π period of 3 pi/2；In pi/2- Pulsed discharge is carried out to charge and discharge capacitance device in the π period, pulsed is carried out to charge and discharge capacitance device within the π -3/2 π period and is filled Electricity；When power factor is lower than 1, electric current and voltage comparator circuit in phase current voltage detecting and comparison circuit export definite value Voltage controls pwm pulse modulation and the pwm pulse modulation circuit in drive control circuit, passes through the first driving circuit and isolation Driving circuit controls the turn-on and turn-off time of the first power switch component and the second power switch component respectively, and then controls the The armature winding N1 of two transformers and the make-and-break time of charge and discharge capacitance device；In alternating current 0- pi/2 and pulse in the π -3/2 π period When formula on-off, the first power switch component and the second power switch component are by adjusting pwm pulse width, that is, make-and-break time, to adjust Save the charge volume of charge and discharge capacitance device；In alternating current pi/2-π and pulse on-off in 3/2 π-2 π period, the first power switch member Part and the second power switch component are by adjusting PWM make-and-break time, to adjust the discharge capacity of charge and discharge capacitance device；Compensation is adjusted to fill The discharge and recharge of discharge capacity device is equivalent to the capacitance for having adjusted compensation charge and discharge capacitance device, and then realizes dynamic and compensate； When the first power switch component and the second power switch component are respectively turned on, electric current is by the first filter inductance, charge and discharge electricity When the armature winding N1 of container and the second transformer, electric energy is stored in the first filter inductance, works as shutdown moment, is stored in Electric energy in one filter inductance releases after the second filter inductance and the filtering of third filter condenser, to sample into Row PFC；On the other hand, the electric energy being stored in the second transformer passes through secondary windings N2, absorption capacitor and coupling It closes capacitor to release, the power factor of sample is corrected again.

Preferably, sample is connected with the Three-phase harmonic source for output harmonic wave voltage by third transformer, three Phase harmonic source includes detection module, the harmonic oscillator for output harmonic wave voltage, the harmonic wave for exporting to harmonic oscillator The PWM controller that voltage carries out electric voltage frequency and amplitude is controlled, harmonic oscillator are connect with PWM controller, PWM controller It is connect with host computer；Harmonic oscillator includes that first communication module, relay output module, analog output module, three-phase are humorous Module occurs for wave, and the input terminal of detection module is connect with power supply grid, and the output end of detection module is connect with host computer, host computer It is connect respectively with the input terminal of the input terminal of relay output module and analog output module by first communication module, relay The output end of device output module and the output end of analog output module occur module with three phase harmonic respectively and connect, three phase harmonic Module occurs to connect with power supply grid；Three-phase harmonic source be used for output harmonic wave voltage, Three-phase harmonic source can export three phase harmonic 2 to 50 higher hamonic waves are, it can be achieved that more parallel runnings, have parallel extended ability, and have strong antijamming capability, fortune Row stability is high, data test is accurate and reliable, the speed of service is fast, work efficiency is high, wiring is simple and operates convenient, operational process Many advantages, such as safe.

In the utility model patent, sample is connected on harmonic oscillator by third transformer, third transformer Voltage transformation is carried out to the harmonic voltage of harmonic oscillator output and transmits electric energy, Three-phase harmonic source is improved and is examining detected sample Product are to the adaptability during the compensation ability of power quality.

In the utility model patent, three phase harmonic occur module be equipped with sequentially connected pre-filter, harmonic power module, Postfilter, harmonic power module include for establishing the PWM rectifier of steady dc voltage, DC side storage capacitor, using In the PWM inverter for generating given voltage signal, PWM rectifier, DC side storage capacitor, PWM inverter are sequentially connected, preceding The output end of filter and the input terminal of PWM rectifier connect, and the output end of PWM inverter is connect with postfilter, PWM control The output end of device is connect with PWM rectifier, PWM inverter respectively；Wherein, by host computer to three-phase current rippled interface, shape State monitoring display interface and harmonic wave generate number set interface and are configured, show；Using by pre-filter, harmonic power mould Block, postfilter combine the three phase harmonic to be formed and module occur, and module occurs to three phase harmonic by PWM controller and exports simultaneously The harmonic voltage of multi-frequency superposition is controlled, and has reached the independent control of PWM rectification and inversion, it is ensured that control logic Accuracy and reliability realizes the accurate control of overtone order and amplitude.

Specifically, pre-filter and postfilter are all made of RLC filtering mode, wherein pre-filter and postfilter are equal Filter inductance, filter resistance, filter capacitor including interconnection, filter inductance are connected in series in PWM rectifier, filtered electrical Resistance is connected in parallel in PWM rectifier again after being connected in series with filter capacitor.

In the utility model patent, it includes that module, B occur for completely identical in structure A phase harmonic wave that module, which occurs, for three phase harmonic Module occurs for phase harmonic wave, module occurs for C phase harmonic wave, and module occurs for A phase harmonic wave, module occurs for B phase harmonic wave, mould occurs for C phase harmonic wave Block is equipped with three phase harmonic and circuit occurs, and it includes state monitor, A.C. contactor, relay, list that circuit, which occurs, for three phase harmonic Harmonic elimination circuit, high pass harmonic elimination circuit, anti-parallel thyristor are adjusted, the input terminal of state monitor is connected by breaker and power supply grid It connects, the output end of state monitor is connected by one end of A.C. contactor and relay contact, the other end of relay contact It is connect with one end of dull harmonic elimination circuit or high pass harmonic elimination circuit, the other end of dull harmonic elimination circuit or high pass harmonic elimination circuit and anti- One end of parallel thyristors connects, and the other end of the anti-parallel thyristor of each branch links together, the touching of anti-parallel thyristor Signalling input terminal is connect with analog output module, and the coil of relay is connect with relay output module, state monitor Communication port connect with communication module.State monitor be mainly used for realizing the status monitoring of each branch, interlock function and The detection of zero cross signal guarantees correct actuation and the no-flashy-flow switching of relay and A.C. contactor.

In the utility model patent, dull harmonic elimination circuit includes the first resistor being connected in series, the first reactor, the first electricity Container.

In the utility model patent, high pass harmonic elimination circuit includes second resistance, the second reactor, the second capacitor, third Capacitor, formation parallel branch in parallel with the second reactor again after third capacitor is connected with second resistance, parallel branch is again It connects with the second capacitor.

Preferably, PWM controller uses single-chip microcontroller, single-chip microcontroller is equipped with dual-port parallel port RAM, dual-port parallel port RAM tool There are data input port, data output, address input port, address scan mouth, the data input port of dual-port parallel port RAM, address Input port is connected on single-chip microcontroller；

Preferably, single-chip microcontroller is connected with for the one 8 parallel port analog-digital converter of regulation amplitude, the 2nd 8 parallel port Analog-digital converter, the data port of the one 8 parallel port analog-digital converter, the data port of the 2nd 8 parallel port analog-digital converter with list The connection of piece machine, the REF mouth and base modules of the REF mouth of the one 8 parallel port analog-digital converter, the 2nd 8 parallel port analog-digital converter Output connection；

Preferably, single-chip microcontroller is also connected with the 3rd 8 parallel port analog-digital converter, the 4th 8 for controlling output waveform Position parallel port analog-digital converter, the 3rd 8 parallel port analog-digital converter, the 4th 8 parallel port analog-digital converter pass through dual-port parallel port The data output of RAM is connected to single-chip microcontroller；

Preferably, the delivery outlet of the one 8 parallel port analog-digital converter, the 2nd 8 parallel port analog-digital converter is respectively with The connection of one amplifier array, the output end of the first amplifier array respectively with the 3rd 8 parallel port analog-digital converter, the 4th 8 and mouth mold The REF mouth of number converter connects, the 3rd 8 parallel port analog-digital converter, the 4th 8 parallel port analog-digital converter output end respectively with The connection of second amplifier array, the output end of the second amplifier array are connect with harmonic oscillator.

In the utility model patent, dual-port is written by data input port and address input port in Wave data by single-chip microcontroller In the RAM of parallel port, waveform table is established, phase shift can be realized in the address difference of write-in.Single-chip microcontroller is respectively by the high by 8 of amplitude signal Position, least-significant byte send the one 8 parallel port analog-digital converter and the 2nd 8 parallel port analog-digital converter to, and the one 8 parallel port modulus turns Parallel operation and the 2nd 8 parallel port analog-digital converter pass to the first amplifier array, the first fortune by base modules calculating output voltage It is cumulative by ratio to put array, output valve is passed into the 3rd 8 parallel port analog-digital converter and the 4th 8 parallel port analog-digital converter REF mouth, to provide the amplitude of output waveform.

In the utility model patent, dual-port parallel port RAM is written in the Wave data of output by single-chip microcontroller, by each moment point Data the 3rd 8 parallel port analog-digital converter and the 4th 8 parallel port analog-digital converter, the 3rd 8 parallel port analog-digital converter is written With the 4th 8 parallel port analog-digital converter by the reference voltage of the REF mouth of itself, output voltage is calculated, sends the second amplifier to Array, to export the waveform phase of needs.

Preferably, detection module includes current transformer, analog-digital converter, the input terminal and power supply electricity of current transformer Net connection, the output end of current transformer and the input terminal of analog-digital converter connect, the output end and host computer of analog-digital converter Connection.

In the utility model patent, central controller is also connected with for providing the idle simulation source of reactive compensation signal, It is connected in parallel between Three-phase harmonic source, idle simulation source by third transformer and sample, idle simulation source is equipped with idle Generator, reacance generator include for energy storage and filtering out the first reactor of high frequency switching ripple electric current, using three-phase fully-controlled Bridge topological form provides the PWM converter of reactive compensation signal, the second driving circuit, the first reactor by third transformer with Power supply grid connection, the exchange side of PWM converter are connect with the first reactor, and the DC side and storage capacitor of PWM converter connect It connects, PWM converter is connected to central controller by the second driving circuit；By the between Three-phase harmonic source, idle simulation source The setting that three transformers and sample are connected in parallel, third transformer carry out voltage to the harmonic voltage that harmonic oscillator exports Electric energy is converted and transmitted, adaptation of the Three-phase harmonic source during compensation ability for examining sample to power quality is improved Property；PWM converter is made of insulated gate bipolar transistor, drives insulated gate bipolar transistor by Space Vector Pulse Width Modulation Pipe generates compensation current waveform, and storage capacitor stores the DC energy generated by insulated gate bipolar transistor；Second driving circuit The control signal for receiving central controller sending, drives the semiconductor power device of PWM converter, and also take into account and half-and-half lead The defencive function of body power device；Idle simulation source can compensating reactive power, adjust three-phase imbalance, harmonics restraint, avoid mutually Phase interference problem, and the flexible Configuration Online reactive power of energy, have effectively achieved the reasonable compensation of reactive power, to be mounted on pole System equipment in its limited space provides safety guarantee.

In the utility model patent, harmonic oscillator is located in harmonic source cabinet, and single-chip microcontroller is located in harmonic controling cabinet, and first Transformer, third transformer are respectively provided in each transformer case, power grid simulation source, harmonic source cabinet, harmonic controling cabinet, idle Simulation source, transformer case are each provided at beside sample, and sample is set on the tester rack, and test is erected on metope, are tested It is provided with patch bay, patch bay is supported below ceiling by support frame, and support frame fixation is located on metope or ceiling, wiring It is provided with wire casing, cable is embedded in wire casing, power grid simulation source, harmonic source cabinet, harmonic controling cabinet, idle simulation source, transformation Device cabinet, sample pass through cable and connect with power supply grid.The installation formed is combined by support frame, patch bay, testing jig Structure not only provided higher stability, fixing and balanced capacity for the installation of system equipment and wiring, but also system is set Safety compact and with higher is counted, and the limited test space is adequately utilized.

Preferably, central controller is connected with for running the monitoring system being monitored to system.Wherein, monitoring system System includes the power quality point that harmonic value for detecting the harmonic wave of Three-phase harmonic source and will test is transmitted to central controller Analyzer, for detection system equipment temperature signal temperature sensor, for detection system equipment smoke signal smog Sensor, the time monitoring module being monitored for the working condition to system, the alarm mould for alarming system Block, alarm module are connect with host computer, power quality analyzer, temperature sensor, smoke sensor device, time monitoring module, report Alert module is connect with central controller；Alarm module includes the current value and/or voltage for receiving when central controller Value exceed threshold value when alert alarm Current Voltage alarm module, for when central controller receives Between the value time alarm module that alert is alarmed when exceeding threshold value, the temperature for receiving when central controller Alert is alarmed when value exceeds threshold value temperature alarming module, the smog for receiving when central controller are dense Spend the smog alarm module, the harmonic value for receiving when central controller that alert is alarmed when exceeding threshold value The harmonic wave alarm module that alert is alarmed when beyond threshold value, Current Voltage alarm module, time alarm module, temperature Degree alarm module, smog alarm module, harmonic wave alarm module are connect with central controller.

In the utility model patent, monitoring system further includes second communication module, and second communication module is controlled with center respectively Device processed, alarm module connection, are transmitted to host computer for warning message by second communication module.

In the utility model patent, monitoring system further includes the data memory module connecting with central controller, passes through number Warning message is stored according to memory module, data memory module can also store low-voltage electric energy quality testing data.

In the utility model patent, data memory module includes the database server and disk array interconnected, number It is connect according to library server with central controller, central controller is stored warning message to disk battle array by database server Column, host computer read warning message from disk array.By combining the data formed by database server and disk array Memory module is combined with the technical solution of above-mentioned monitoring system, improves the reliability of power quality detection system, to mention The high integrality and accuracy of power quality data, and different monitoring functions can be set according to monitoring demand, utilize storage In the data of database server evaluation system is established, according to the anti-low-voltage electric energy quality detecting system that pushes away of the superiority and inferiority of the quality of data Reliability carries out the assessment of long-range reliability to low-voltage electric energy quality detecting system to realize, can also to system reliability into Row diagnosis and analysis, and system is overhauled and safeguarded accordingly by the historical variations trend of reliability assessment.

In the utility model patent, idle simulation source is equipped with RS485 interface, and reacance generator is by RS485 interface in Entreat controller connection.

In the utility model patent, the first transformer, third transformer pass through RS485 interface respectively and central controller connects It connects.

The utility model due to use above technical scheme, have significant technical effect: using by power grid simulation source, Current detection module, voltage detection module, the power grid simulation source system of central controller composition, pass through power factor compensation circuit Dynamic power factor compensation is carried out to sample, the adaptability for making it possible to examine sample to power supply grid realizes Detection to the normal abnormal characteristic of power supply grid, and module is occurred to three phase harmonic by PWM controller while being exported a variety of The harmonic voltage of frequency superposition is controlled, and has been reached the independent control of PWM rectification and inversion, has been further ensured control logic Accuracy and reliability, realize the accurate control of overtone order and amplitude, the safety reduced in system operation is hidden Suffer from；The system has that strong antijamming capability, operation stability are high, data test is accurate and reliable, the speed of service is fast, working efficiency Many advantages, such as high, wiring is simply and operation is convenient, operational process is safe.

Detailed description of the invention

Fig. 1 is the functional block diagram of the power grid simulation source system embodiment of the utility model.

Fig. 2 is the circuit diagram of the power factor compensation circuit embodiment of the utility model.

Fig. 3 is the functional block diagram of the reacance generator embodiment of the utility model.

Fig. 4 is the circuit of the reacance generator embodiment being made of the first reactor and PWM converter of the utility model Schematic diagram.

Fig. 5 is that the Three-phase harmonic source of the utility model carries out the functional block diagram of detection embodiment to sample.

Fig. 6 is the schematic block circuit diagram of the Three-phase harmonic source embodiment of the utility model.

Fig. 7 is that the circuit diagram of circuit embodiments occurs for the three phase harmonic of the utility model.

Fig. 8 is that the circuit diagram of module major loop embodiment occurs for the three phase harmonic of the utility model.

Fig. 9 is that the PWM controller of the utility model uses the functional block diagram of single-chip microcontroller embodiment.

Figure 10 is that the harmonic source cabinet, harmonic controling cabinet, sample of the utility model install the structural schematic diagram of embodiment.

Specific embodiment

The utility model is described in further detail with embodiment with reference to the accompanying drawing.

A kind of power grid simulation source system, as Figure 1-10 shows, including the power grid simulation source 3, right being connected on power supply grid 4 The voltage detecting mould that power grid simulation source 3 carries out the current detection module 35 of current sample, carries out voltage sample to power grid simulation source 3 Block 36, the central controller 15 controlled to system, the host computer 13 connecting with central controller 15, sample 1 pass through First transformer 2 is connect with power grid simulation source 3, and current detection module 35, voltage detection module 36 pass through power factor compensation electricity Road 34 is connected on central controller 15, and power grid simulation source 3, the first transformer 2, sample 1 are and central controller 15 connections；Power factor compensation circuit 34 includes the regulated power supply 344 interconnected, power factor compensating main circuit 341, PWM Impulse modulation and drive control circuit 343, phase current voltage detecting and comparison circuit 342, regulated power supply 344 are circuit confession Electricity, power factor compensating main circuit 341 include the first filter inductance 34109, the second filter inductance 34101, the first filter capacitor Device 34110, the second filter condenser 34111, third filter condenser 34112, charge and discharge capacitance device 34107, absorption capacitor 34113, coupling capacitor 34114, the second transformer 34106, current sense resistor 34102, first voltage detection resistance 34103, second voltage detection resistance 34104, the first power switch component 34108, the second power switch component 34105, first One end of filter inductance 34109 and the input terminal L connection of alternating current, the other end of the first filter inductance 34109 and charge and discharge electricity One end connection of container 34107, first voltage detection resistance 34103, current sense resistor 34102, charge and discharge capacitance device 34107 The other end connect with one end of the armature winding N1 of the second transformer 34106, the armature winding N1's of the second transformer 34106 The other end is connect with the first power switch component 34108 in parallel and the second power switch component 34105, the first power switch member The anode of the cathode of part 34108 and the second power switch component 34105 is connected to the common end N of alternating current, the first power switch The cathode of element 34108 and the second power switch component 34105 and driving stage are connected respectively to pwm pulse modulation and drive control The first driving circuit 3434 and isolated drive circuit 3432 of circuit 343；One end of first filter condenser 34110 is connected to friendship The input terminal L of galvanic electricity, the common end N connection of the other end and alternating current of the first filter condenser 34110；Second filter capacitor One end of device 34111 is connect with the first filter inductance 34109, and the other end of the second filter condenser 34111 is connected to alternating current Common end N on；The other end of first voltage detection resistance 34103 respectively with phase current voltage detecting and comparison circuit 342 Voltage detecting circuit 3423, second voltage detection resistance 34104 one end connection, second voltage detection resistance 34104 it is another One end is connected to the common end N of alternating current；The other end of current sense resistor 34102 is connected by the second filter inductance 34101 To the output end LM of alternating current；Absorption capacitor 34113 is in parallel with the secondary windings N2 of the second transformer 34106, Absorption Capacitance One end of device 34113 and the output end LM connection of alternating current, the other end and coupling capacitor 34114 of absorption capacitor 34113 One end connection, the other end of coupling capacitor 34114 is connected to the common end N of alternating current；Third filter condenser 34112, One end of sample 1 is connect with the output end LM of alternating current respectively, third filter condenser 34112, sample 1 it is another End is connected respectively to the common end N of alternating current.Wherein, when power factor compensation circuit works, in power factor compensating main circuit Input terminal L and common end N input AC electricity AC, alternating current AC by the first filter condenser, the first filter inductance, second filter Wave capacitor is supplied to charge and discharge capacitance device, the armature winding N1 of the second transformer, the first power switch component, the second power and opens The circuit of element composition is closed, then by current sense resistor, after the second filter inductance and the filtering of third filter condenser, Supply sample；

In the present embodiment, the voltage detecting circuit 3423 of phase current voltage detecting and comparison circuit is mended via power factor After repaying the first voltage detection resistance and second voltage detection resistance partial pressure in main circuit, the end voltage of sample is carried out Detection；Current detection circuit 3421 flows through the electric current of sample, then the voltage that will test by current sense resistor detection It after current waveform processing, is transmitted to electric current and is compared with voltage comparator circuit 3422, PWM arteries and veins is controlled by control voltage PWM pulse modulated circuit 3433 in modulated and drive control circuit controls the first driving circuit 3434 and isolation drive electricity Road 3432 carries out switch control to the first power switch component 34108 and the second power switch component 34105 respectively；Phase inspection After the voltage waveform processing that slowdown monitoring circuit 3424 detects voltage detecting circuit 3423, it is transmitted to pwm pulse modulation and driving Phase and automatic power factor control circuit 3431 in control circuit, are led to by phase and automatic power factor control circuit 3431 It crosses pwm pulse modulation circuit 3433, the first driving circuit 3434 and isolated drive circuit 3432 and controls the first power switch component 34108 and second power switch component 34105 on-off sequence, by the armature winding N1 of the second transformer within the 0- pi/2 period Pulse charging is carried out to charge and discharge capacitance device, pulsed discharge is carried out to charge and discharge capacitance device within -2 π period of 3 pi/2；π/ Pulsed discharge is carried out to charge and discharge capacitance device in the 2- π period, pulsed is carried out to charge and discharge capacitance device within the π -3/2 π period Charging；When power factor is lower than 1, the electric current and voltage comparator circuit output in phase current voltage detecting and comparison circuit are fixed Threshold voltage controls pwm pulse modulation and the pwm pulse modulation circuit in drive control circuit, passes through the first driving circuit and isolation Driving circuit controls the turn-on and turn-off time of the first power switch component and the second power switch component respectively, and then controls the The armature winding N1 of two transformers and the make-and-break time of charge and discharge capacitance device；In alternating current 0- pi/2 and pulse in the π -3/2 π period When formula on-off, the first power switch component and the second power switch component are by adjusting pwm pulse width, that is, make-and-break time, to adjust Save the charge volume of charge and discharge capacitance device；In alternating current pi/2-π and pulse on-off in 3/2 π-2 π period, the first power switch member Part and the second power switch component are by adjusting PWM make-and-break time, to adjust the discharge capacity of charge and discharge capacitance device；Compensation is adjusted to fill The discharge and recharge of discharge capacity device is equivalent to the capacitance for having adjusted compensation charge and discharge capacitance device, and then realizes dynamic and compensate； When the first power switch component and the second power switch component are respectively turned on, electric current is by the first filter inductance, charge and discharge electricity When the armature winding N1 of container and the second transformer, electric energy is stored in the first filter inductance, works as shutdown moment, is stored in Electric energy in one filter inductance releases after the second filter inductance and the filtering of third filter condenser, to sample into Row PFC；On the other hand, the electric energy being stored in the second transformer passes through secondary windings N2, absorption capacitor and coupling It closes capacitor to release, the power factor of sample is corrected again.

In the present embodiment, sample 1 is connected with the three phase harmonic for output harmonic wave voltage by third transformer 37 Source 5, Three-phase harmonic source 5 include detection module 53, for output harmonic wave voltage harmonic oscillator 52, for harmonic wave occur The PWM controller 51 that the harmonic voltage that device 52 exports carries out electric voltage frequency and amplitude is controlled, harmonic oscillator 52 and PWM Controller 51 connects, and PWM controller 51 is connect with host computer 13；Harmonic oscillator 52 includes first communication module 524, relay Module 521, the input terminal of detection module 53 and power supply occur for device output module 522, analog output module 523, three phase harmonic Power grid 4 connects, and the output end of detection module 53 connect with host computer 13, host computer 13 pass through first communication module 524 respectively with The input terminal of relay output module 522 is connected with the input terminal of analog output module 523, relay output module 522 The output end of output end and analog output module 523 occurs module 521 with three phase harmonic respectively and connect, and mould occurs for three phase harmonic Block 521 is connect with power supply grid 4.

In the present embodiment, PWM controller 51 uses single-chip microcontroller 510, and single-chip microcontroller 510 is equipped with dual-port parallel port RAM19, both-end Mouth parallel port RAM19 has data input port, data output, address input port, address scan mouth, dual-port parallel port RAM19's Data input port, address input port are connected on single-chip microcontroller 510；Single-chip microcontroller 510 is connected with for the one 8 of regulation amplitude simultaneously 24, the 2nd 8 parallel port analog-digital converters 26 of mouth mold number converter, the data port of the one 8 parallel port analog-digital converter 24, the 2nd 8 The data port of position parallel port analog-digital converter 26 is connect with single-chip microcontroller 510, the REF mouth of the one 8 parallel port analog-digital converter 24, the The REF mouth of 28 parallel port analog-digital converters 26 is connect with the output of base modules 25.

In the present embodiment, single-chip microcontroller 510 is also connected with the 3rd 8 parallel port analog-digital converter for controlling output waveform 20, the 4th 8 parallel port analog-digital converter 22,20, the 4th 8 parallel port analog-digital converters 22 of the 3rd 8 parallel port analog-digital converter are equal Single-chip microcontroller 510 is connected to by the data output of dual-port parallel port RAM19.

In the present embodiment, the delivery outlet point of 24, the 2nd 8 parallel port analog-digital converters 26 of the one 8 parallel port analog-digital converter Do not connect with the first amplifier array 23, the output end of the first amplifier array 23 respectively with the 3rd 8 parallel port analog-digital converter 20, The REF mouth connection of 4th 8 parallel port analog-digital converter 22,20, the 4th 8 parallel port moduluses of the 3rd 8 parallel port analog-digital converter turn The output end of parallel operation 22 is connect with the second amplifier array 21 respectively, the output end and harmonic oscillator 52 of the second amplifier array 21 Connection.

In the present embodiment, dual-port parallel port is written by data input port and address input port in Wave data by single-chip microcontroller In RAM, waveform table is established, phase shift can be realized in the address difference of write-in.Single-chip microcontroller is respectively by the most-significant byte of amplitude signal, low 8 Position sends the one 8 parallel port analog-digital converter and the 2nd 8 parallel port analog-digital converter to, the one 8 parallel port analog-digital converter and 2nd 8 parallel port analog-digital converter calculates output voltage by base modules, passes to the first amplifier array, the first amplifier array It is cumulative by ratio, output valve is passed to the REF of the 3rd 8 parallel port analog-digital converter and the 4th 8 parallel port analog-digital converter Mouthful, to provide the amplitude of output waveform.

In the present embodiment, dual-port parallel port RAM is written in the Wave data of output by single-chip microcontroller, by the data of each moment point The 3rd 8 parallel port analog-digital converter and the 4th 8 parallel port analog-digital converter, the 3rd 8 parallel port analog-digital converter and the 4th 8 is written Position parallel port analog-digital converter calculates output voltage, sends the second amplifier array to by the reference voltage of the REF mouth of itself, from And export the waveform phase needed.

In the present embodiment, detection module 53 includes current transformer 531, analog-digital converter 532, current transformer 531 Input terminal is connect with power supply grid 4, and the output end of current transformer 531 is connect with the input terminal of analog-digital converter 532, modulus The output end of converter 532 is connect with host computer 13.

In the present embodiment, central controller 15 is connected with for running the monitoring system being monitored to system.Wherein, it supervises Control system includes the electric energy that harmonic value for detecting the harmonic wave of Three-phase harmonic source 5 and will test is transmitted to central controller 15 Mass-synchrometer 14, for detection system equipment temperature signal temperature sensor 8, for detection system equipment smog believe Number smoke sensor device 9, be monitored for the working condition to system time monitoring module 10, for being reported to system Alert alarm module 12 is connected in parallel by transformer 2 with sample 1 between Three-phase harmonic source 5, idle simulation source 32, electricity Net simulation source 3 is connect with power supply grid 4, is connected between power grid simulation source 3 and sample 1 by transformer 2, alarm module 12 It is connect with host computer 13, power grid simulation source 3, Three-phase harmonic source 5, idle simulation source 32, transformer 2, sample 1, electric energy matter Measure analyzer 14, temperature sensor 8, smoke sensor device 9, time monitoring module 10, alarm module 12 with central controller 15 Connection；Alarm module 12 include current value for being received when central controller 15 and/or voltage value beyond threshold value when sending The Current Voltage alarm module 121 that warning message is alarmed, the time value for receiving when central controller 15 exceed threshold The time alarm module 122 that alert is alarmed when value, the temperature value for receiving when central controller 15 surpass Alert is alarmed when threshold value out temperature alarming module 123, the smog for being received when central controller 15 Alert is alarmed when concentration exceeds threshold value smog alarm module 124, for receiving when central controller 15 Harmonic value harmonic wave alarm module 125 for alarming of alert when exceeding threshold value, Current Voltage alarm module 121, Time alarm module 122, temperature alarming module 123, smog alarm module 124, harmonic wave alarm module 125 are controlled with center Device 15 connects.

In the present embodiment, three phase harmonic occurs module 521 and is equipped with sequentially connected pre-filter 16, harmonic power module 17, postfilter 18, harmonic power module 17 include PWM rectifier 171, the DC side for establishing steady dc voltage Storage capacitor, the PWM inverter 173 for generating given voltage signal, PWM rectifier 171, DC side storage capacitor 172, PWM inverter 173 is sequentially connected, and the output end of pre-filter 16 is connect with the input terminal of PWM rectifier 171, and PWM is inverse Become device 173 output end connect with postfilter 18, the output end of PWM controller 51 respectively with PWM rectifier 171, PWM inversion Device 173 connects.Wherein, number is generated to three-phase current rippled interface, status monitoring display interface and harmonic wave by host computer to set Interface is set to be configured, show；It is sent out using the three phase harmonic formed is combined by pre-filter, harmonic power module, postfilter Raw module, occurs module to three phase harmonic by PWM controller while the harmonic voltage for exporting multi-frequency superposition controls, Reached PWM rectification and inversion independent control, it is ensured that the accuracy and reliability of control logic, realize overtone order and The accurate control of amplitude.

In the present embodiment, pre-filter and postfilter are all made of RLC filtering mode, wherein pre-filter and post filtering Device includes the filter inductance interconnected, filter resistance, filter capacitor, and filter inductance is connected in series in PWM rectifier, is filtered Wave resistance and filter capacitor are connected in parallel on PWM rectifier again after being connected in series.

In the present embodiment, it includes that module 5211, B occur for completely identical in structure A phase harmonic wave that module 521, which occurs, for three phase harmonic Module 5212 occurs for phase harmonic wave, module 5213 occurs for C phase harmonic wave, and it is humorous that module, B phase harmonic wave generation module, C phase occur for A phase harmonic wave Wave occurs module and is equipped with three phase harmonic generation circuit 5210, and it includes state monitor 52102, exchange that circuit, which occurs, for three phase harmonic Contactor 52103, relay 52104, dull harmonic elimination circuit 52105, high pass harmonic elimination circuit 52107, anti-parallel thyristor 52106, the input terminal of state monitor is connect by breaker 52101 with power supply grid, and the output end of state monitor passes through The connection of one end of A.C. contactor and relay contact, the other end of relay contact and dull harmonic elimination circuit or high pass harmonic elimination electricity The one end on road connects, one end connection of the other end and anti-parallel thyristor of dull harmonic elimination circuit or high pass harmonic elimination circuit, and each The other end of the anti-parallel thyristor on road links together, the trigger signal input terminal and analog output mould of anti-parallel thyristor Block connection, the coil of relay are connect with relay output module, and the communication port of state monitor is connect with communication module.Shape State monitor is mainly used for realizing the detection of the status monitoring, interlock function and zero cross signal of each branch, guarantee relay and The correct actuation of A.C. contactor and no-flashy-flow switching.

In the present embodiment, dull harmonic elimination circuit 52105 includes the first resistor 521053 being connected in series, the second reactor 521052, first capacitor device 521051.

In the present embodiment, high pass harmonic elimination circuit 52107 includes second resistance 521073, third reactor 521071, second Capacitor 521072, third capacitor 521074, third capacitor are in parallel with third reactor again after connecting with second resistance Parallel branch is formed, parallel branch is connected with the second capacitor again.

In the present embodiment, central controller 15 is also connected with for providing the idle simulation source 32 of reactive compensation signal, and three It is connected in parallel by third transformer 37 with sample 1 between phase harmonic source 5, idle simulation source 32, idle simulation source 32 is set There is reacance generator 6, reacance generator 6 includes for energy storage and filtering out the first reactor 61 of high frequency switching ripple electric current, adopting PWM converter 62, the second driving circuit 64 of reactive compensation signal, the first reactor are provided with three-phase full-controlled bridge topological form 61 are connect by third transformer 37 with power supply grid 4, and the exchange side of PWM converter 62 is connect with the first reactor 61, and PWM becomes The DC side of stream device 62 is connect with storage capacitor 63, and PWM converter 62 is connected to central controller by the second driving circuit 64 15；The setting being connected in parallel between Three-phase harmonic source, idle simulation source by third transformer and sample, third transformer Voltage transformation is carried out to the harmonic voltage of harmonic oscillator output and transmits electric energy, Three-phase harmonic source is improved and is examining detected sample Product are to the adaptability during the compensation ability of power quality；PWM converter is made of insulated gate bipolar transistor, passes through electricity Space vector modulation technique driving insulated gate bipolar transistor is pressed to generate compensation current waveform, storage capacitor storage is double by insulated gate The DC energy that gated transistors generate；Second driving circuit receives the control signal of central controller sending, drives PWM unsteady flow The semiconductor power device of device, and also take into account the defencive function to semiconductor power device；Idle simulation source can compensate nothing Function adjusts three-phase imbalance, harmonics restraint, avoids the problem of interfering with each other, and the flexible Configuration Online reactive power of energy, effectively The reasonable compensation of reactive power is realized, the system equipment to be mounted in extremely limited space provides safety guarantee.

In the present embodiment, harmonic oscillator 52 is located in harmonic source cabinet 30, and single-chip microcontroller 510 is located in harmonic controling cabinet 31, First transformer 2, third transformer 37 are respectively provided in each transformer case 31, power grid simulation source 3, harmonic source cabinet 30, humorous Wave control cabinet 31, idle simulation source 32, transformer case 31 are each provided at 1 side of sample, and sample 1 is located at testing jig 27 On, testing jig 27 is located on metope, and testing jig 27 is equipped with patch bay 28, and patch bay 28 is supported under ceiling by support frame 29 Side, the fixation of support frame 29 are located on metope or ceiling, and patch bay 28 is equipped with wire casing 280, and cable is embedded in wire casing 280, Power grid simulation source 3, harmonic source cabinet 30, harmonic controling cabinet 31, idle simulation source 32,2 cabinet of transformer, sample 1 pass through electricity Cable is connect with power supply grid 4.The mounting structure formed is combined by support frame, patch bay, testing jig, had both been the peace of system equipment Dress and wiring provide higher stability, fixing and balanced capacity, and make system compact to design and peace with higher Quan Xing, and the limited test space is adequately utilized.

In the present embodiment, monitoring system further includes second communication module 11, and second communication module 11 is controlled with center respectively Device 15, alarm module connection, are transmitted to host computer 13 for warning message by second communication module 11.

In the present embodiment, monitoring system further includes the data memory module 7 connecting with central controller 15, is deposited by data Storage module 7 stores warning message.

In the present embodiment, data memory module 7 includes the database server 71 and disk array 72 interconnected, number It is connect according to library server 71 with central controller 15, central controller 15 is stored warning message by database server 71 To disk array 72, host computer 13 reads warning message from disk array 72.By by database server and disk array The data memory module that combination is formed is combined with the technical solution of above-mentioned monitoring system, improves power quality detection system To improve the integrality and accuracy of power quality data, and different monitoring can be arranged in reliability according to monitoring demand Function establishes evaluation system using the data for being stored in database server, pushes away low-voltage electric energy according to the superiority and inferiority of the quality of data is counter The reliability of quality detecting system, thus realize the assessment that long-range reliability is carried out to low-voltage electric energy quality detecting system, it can also System reliability is diagnosed and is analyzed, and system is overhauled accordingly by the historical variations trend of reliability assessment And maintenance.

In the present embodiment, idle simulation source 32 is equipped with RS485 interface, and reacance generator 6 passes through RS485 interface and center Controller 15 connects.

In the present embodiment, the first transformer, third transformer by RS485 interface and central controller 15 respectively by being connected It connects.

In short, the above is only the preferred embodiment of the present invention, it is all according to present utility model application the scope of the patents institute The equivalent changes and modifications of work should all belong to the covering scope of the utility model patent.

Claims (7)

1. a kind of power grid simulation source system, it is characterised in that: including the power grid simulation source (3), right being connected on power supply grid (4) The voltage that power grid simulation source (3) carries out the current detection module (35) of current sample, power grid simulation source (3) are carried out with voltage sample Detection module (36), the central controller (15) that system is controlled, the host computer (13) being connect with central controller (15), Sample (1) is connect by the first transformer (2) with power grid simulation source (3), current detection module (35), voltage detection module (36) it is connected on central controller (15) by power factor compensation circuit (34), power grid simulation source (3), the first transformation Device (2), sample (1) are connect with central controller (15)；Power factor compensation circuit (34) includes the steady of interconnection Voltage source (344), power factor compensating main circuit (341), pwm pulse modulation and drive control circuit (343), phase current electricity Pressure detection and comparison circuit (342), regulated power supply (344) are circuit power supply, and power factor compensating main circuit (341) includes first Filter inductance (34109), the second filter inductance (34101), the first filter condenser (34110), the second filter condenser (34111), third filter condenser (34112), charge and discharge capacitance device (34107), absorption capacitor (34113), coupled capacitor Device (34114), the second transformer (34106), current sense resistor (34102), first voltage detection resistance (34103), second Voltage detection resistances (34104), the first power switch component (34108), the second power switch component (34105), the first filtering One end of inductance (34109) and the input terminal L connection of alternating current, the other end of the first filter inductance (34109) and charge and discharge electricity One end connection of container (34107), first voltage detection resistance (34103), current sense resistor (34102), charge and discharge capacitance The other end of device (34107) is connect with one end of the armature winding N1 of the second transformer (34106), the second transformer (34106) Armature winding N1 the other end and the first power switch component (34108) and the second power switch component (34105) in parallel Connection, the cathode of the first power switch component (34108) and the anode of the second power switch component (34105) are connected to alternating current Common end N, the cathode and driving stage of the first power switch component (34108) and the second power switch component (34105) distinguish It is connected to the first driving circuit (3434) and isolated drive circuit (3432) of pwm pulse modulation and drive control circuit (343)； One end of first filter condenser (34110) is connected to the input terminal L of alternating current, the first filter condenser (34110) it is another End is connect with the common end N of alternating current；One end of second filter condenser (34111) is connect with the first filter inductance (34109), The other end of second filter condenser (34111) is connected on the common end N of alternating current；First voltage detection resistance (34103) The other end examined respectively with the voltage detecting circuit (3423) of phase current voltage detecting and comparison circuit (342), second voltage One end of measuring resistance (34104) connects, and the other end of second voltage detection resistance (34104) is connected to the common end N of alternating current； The other end of current sense resistor (34102) is connected to the output end LM of alternating current by the second filter inductance (34101)；It absorbs Capacitor (34113) is in parallel with the secondary windings N2 of the second transformer (34106), one end of absorption capacitor (34113) and friendship The output end LM connection of galvanic electricity, the other end of absorption capacitor (34113) are connect with one end of coupling capacitor (34114), coupling The other end for closing capacitor (34114) is connected to the common end N of alternating current；Third filter condenser (34112), sample (1) one end is connect with the output end LM of alternating current respectively, the other end of third filter condenser (34112), sample (1) It is connected respectively to the common end N of alternating current.

2. a kind of power grid simulation source system according to claim 1, it is characterised in that: sample (1) is become by third Depressor (37) is connected with the Three-phase harmonic source (5) for output harmonic wave voltage, Three-phase harmonic source (5) include detection module (53), Voltage frequency is carried out for the harmonic oscillator (52) of output harmonic wave voltage, the harmonic voltage for exporting to harmonic oscillator (52) The PWM controller (51) that rate and amplitude are controlled, harmonic oscillator (52) are connect with PWM controller (51), PWM controller (51) it is connect with host computer (13)；Harmonic oscillator (52) include first communication module (524), relay output module (522), Module (521) occur for analog output module (523), three phase harmonic, and the input terminal of detection module (53) and power supply grid (4) are even Connect, the output end of detection module (53) is connect with host computer (13), host computer (13) by first communication module (524) respectively with The input terminal of relay output module (522) is connected with the input terminal of analog output module (523), relay output module (522) output end of output end and analog output module (523) occurs module (521) with three phase harmonic respectively and connect, and three Phase harmonic wave occurs module (521) and connect with power supply grid (4).

3. a kind of power grid simulation source system according to claim 2, it is characterised in that: PWM controller (51) uses monolithic Machine (510), single-chip microcontroller (510) are equipped with dual-port parallel port RAM (19), and dual-port parallel port RAM (19) has data input port, data Delivery outlet, address input port, address scan mouth, the data input port of dual-port parallel port RAM (19), address input port are connected to list On piece machine (510)；Single-chip microcontroller (510) is connected with the one 8 parallel port analog-digital converter (24) for regulation amplitude, the 2nd 8 Parallel port analog-digital converter (26), the data port of the one 8 parallel port analog-digital converter (24), the 2nd 8 parallel port analog-digital converter (26) data port is connect with single-chip microcontroller (510), the REF mouth of the one 8 parallel port analog-digital converter (24), the 2nd 8 parallel port The REF mouth of analog-digital converter (26) is connect with the output of base modules (25).

4. a kind of power grid simulation source system according to claim 3, it is characterised in that: single-chip microcontroller (510) is also connected with use In the 3rd 8 parallel port analog-digital converter (20), the 4th 8 parallel port analog-digital converter (22) of control output waveform, the 3rd 8 simultaneously Mouth mold number converter (20), the 4th 8 parallel port analog-digital converter (22) pass through the data output of dual-port parallel port RAM (19) It is connected to single-chip microcontroller (510).

5. a kind of power grid simulation source system according to claim 4, it is characterised in that: the one 8 parallel port analog-digital converter (24), the delivery outlet of the 2nd 8 parallel port analog-digital converter (26) is connect with the first amplifier array (23) respectively, the first amplifier array (23) the output end REF mouth with the 3rd 8 parallel port analog-digital converter (20), the 4th 8 parallel port analog-digital converter (22) respectively Connection, the 3rd 8 parallel port analog-digital converter (20), the 4th 8 parallel port analog-digital converter (22) output end respectively with the second fortune Array (21) connection is put, the output end of the second amplifier array (21) is connect with harmonic oscillator (52).

6. a kind of power grid simulation source system according to Claims 2 or 3 or 4 or 5, it is characterised in that: detection module (53) Including current transformer (531), analog-digital converter (532), the input terminal of current transformer (531) is connect with power supply grid (4), The output end of current transformer (531) is connect with the input terminal of analog-digital converter (532), the output end of analog-digital converter (532) It is connect with host computer (13).

7. a kind of power grid simulation source system according to claim 6, it is characterised in that: central controller (15) connection is useful In the monitoring system being monitored to system operation.