CN102768314B - Double-closed-loop testing device for intelligent substation and control method thereof - Google Patents
Double-closed-loop testing device for intelligent substation and control method thereof Download PDFInfo
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Abstract
The invention discloses a double-closed-loop testing device for an intelligent substation. The double-closed-loop testing device is characterized by comprising a main control board unit, a digital/analog conversion unit, a power amplification unit, a feedback loop switching unit, an analog/digital conversion unit, a liquid crystal display unit, a network communication unit and a power supplying unit which provides different voltages for various units of the device. The device is combined with an upper computer software platform and a master clock, and the connecting reliability of secondary equipment of the substation such as a merging unit, a network switch, a relay protection device, a measurement control device, a safety control device, a metering device and a background monitoring system and the configuration accuracy can be tested. The device is provided with two closed loops, wherein by one closed loop for correcting zero drift of the units of the device, the degree of automation is increased, the workload of debugging personnel for the device is reduced, the maintenance of the device is reduced, and the field debugging personnel of the intelligent substation can correct the system error before an experiment; and by the other closed loop, the output quantity of the double-closed-loop testing device can be monitored in real time, and the output waveform in a steady state is corrected according to a detection value.
Description
Technical field
The present invention relates to intelligent substation test, test field, is specifically the two closed-loop testing devices of a kind of intelligent substation and control method.
Background technology
Intelligent grid fast development, according to State Grid Corporation of China's planning, China will build up a large amount of intelligent substations, and the test method of old intelligent substation secondary side can not meet the demands, and need to inquire into out brand-new test method.First existing apparatus does not all have closed loop, only has through path, thereby can not revise in real time the waveform sending, and can not observe the waveform self sending; Secondly existing apparatus does not all have closed loop, only has through path, thereby can not automatically complete the drift measurement of power amplifier unit, needs regularly to measure manually; In existing apparatus, such as relay-protection tester, number of active lanes is limited again, can only carry out reaying protection test to single protective device or 2-3 platform protective device, can not to all circuits of secondary side, test simultaneously; Therefore need to be improved.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, this provide the upright platform of a kind of combination upper computer software and major clock to time the two closed-loop testing devices of intelligent substation.
The present invention realizes like this, construct the two closed-loop testing devices of a kind of intelligent substation, it is characterized in that: include master control borad unit, D/A conversion unit, power amplification unit, feedback loop switch unit, AD conversion unit, liquid crystal display, network communication unit and provide the power supply of voltage that unit is provided to each unit of device; Described master control borad unit is connected communication with network communication unit, master control borad unit is also connected communication with D/A conversion unit, D/A conversion unit is connected communication with power amplification unit, feedback loop switch unit is connected communication with AD conversion unit with power amplification unit, AD conversion unit is connected communication with master control borad unit, and liquid crystal display connects master control borad unit.
According to the two closed-loop testing devices of a kind of intelligent substation of the present invention, it is characterized in that: described D/A conversion unit comprises D/A modular converter, filtration module and protection module 104c;
Described D/A modular converter is for converting simulated digital amount signal to simulating signal; Described filtration module is for filtering the signal that disturbs power frequency 50Hz frequency; Described protection module 104c is for isolating rear end D/A modular converter and power amplification unit.
According to the two closed-loop testing devices of a kind of intelligent substation of the present invention, it is characterized in that: described AD conversion unit comprises protection module 107a, signal condition module and A/D modular converter; Described protection module 107a is used for isolating rear end A/D modular converter and front end power amplification unit; Signal condition module is for signal more than filtering 100Hz, and anti-aliasing filter.
According to the two closed-loop testing devices of a kind of intelligent substation of the present invention, it is characterized in that: network communication unit comprises communication network module and setting network module, and described communication network module is used for connecting host computer emulation platform, carries out data interaction; Described setting network module for main frame to time, make this device be synchronized with major clock.
According to the two closed-loop testing devices of a kind of intelligent substation of the present invention, it is characterized in that: feedback loop switch unit comprises feedback loop control module and mutual inductor module, described mutual inductor module is for meeting the electric current of electric power standard, the voltage signal that voltage transitions becomes can directly be gathered by AD conversion unit.
According to the two closed-loop testing devices of a kind of intelligent substation of the present invention, it is characterized in that: described master control borad unit comprises FPGA processor and goes out at a high speed three-dimensional DSP, described FPGA processor is responsible for processing from the emulated data of the emulation platform row of channels of going forward side by side and is distributed, and in corrective system drift process, revise drift value and revise emulation steady-state value in normal transmission emulated data process, described DSP is responsible for gathering output data and calculating, and draws modified value and controls liquid crystal display.
This device of root can simulated intelligence transformer station routine transformer characteristic; The electric analog data-switching of upper computer software emulation platform is become to meet to electric current, the voltage of intelligent substation standard; Before using this device to do experiment, can by closed loop, automatically complete the error correction of whole device, comprise drift, the error of closed loop switch unit, the error of D/A conversion unit of power amplification unit; By closed loop, collection is put to the waveform that sends in real time and the waveform of reception and emulation platform, after Fast Fourier Transform (FFT) is processed, the waveform can real time correction device sending.
The two closed loop test control methods of intelligent substation, is characterized in that:
During normal transmission emulated data:
First, by extraneous software emulation platform emulation power failure, production figures amount, this system, by network communication unit, receives emulated data, and is stored in master control borad unit, after data channel allocation process, is ready for sending to D/A conversion unit;
Then, after D/A conversion unit receives the digital quantity signal of master control borad unit, converting digital quantity signal to scope is-arrive+10V voltage analog signal of 10V that the processing of module after filtering, obtains clean sine wave signal;
Then power amplification unit zooms into the small signal analog quantity receiving to meet the large electric current of electric system standard, large voltage, and sends to the merge cells of access;
Then the mutual inductor module of feedback loop switch unit, no-load voltage ratio as required converts the large electric current sending, large voltage unification to scope for the-5V voltage signal to+5V;
Then the voltage signal after second-order filter sends AD conversion unit to, converts simulation small-signal amount to digital quantity signal, and prepares to send to master control borad unit;
Last WT master control borad unit high speed processor DSP obtains after the digital quantity of AD conversion unit and the digital quantity of upper layer software (applications) emulation, through Fourier, calculate difference between the actual amount sending and the amount of emulation, according to algorithm, calculate the modified value next time sending successively, by this modified value, give FPGA processor;
Corrective system drift and error:
First by the touch of LCD MODULE, FPGA processor transmits control signal to loop switch unit, inform that current device will enter system drift and error correction state, correction drift in the two closed loops of startup and the loop of error, all emulated data data and control signals that this timer shielding emulation platform sends, and make FPGA send zero to D/A conversion unit;
Then pass through power amplification unit, loop switch unit, AD conversion unit, the DC quantity existing in system is collected to master control borad unit, now high speed processor DSP calculates drift and the error existing in system, records this value, as the modified value of normal conversion and transmission emulated data.
The invention has the advantages that: (1) this device is the output signal of simulated intelligence transformer station routine transformer; so in conjunction with Host Computer Software Platform, can test the connection reliability of the secondary devices such as merge cells, the network switch, protective relaying device, measuring and controlling, security control device, measuring apparatus, background monitoring system.(2) this device can convert host computer electric analog small-signal to electric current, the voltage signal that meets intelligent substation requirement.(3) this device is with two closed loops, wherein the closed loop of each unit drift of means for correcting has improved automaticity, reduced device debugging personnel's workload, also reduced the later maintenance of this device simultaneously, allow intelligent substation field adjustable personnel can be before experiment corrective system error.(4) this device is with two closed loops, and wherein the closed loop of normal monitoring device output quantity can detect output quantity, the output waveform in the time of can proofreading and correct stable state in real time.(5) this device is with two closed loops, and wherein the closed loop of normal monitoring device output quantity has filter function.(6) this device and major clock time part and this device and the data interaction of host computer simulation software are partly adopted to independently network portion, make data interaction with to time do not interfere with each other mutually.(7) have and main frame time adjustment function, so can multi-platform combined use differ from merge cells input current, voltage to each circuit of synchronous intelligent transformer station, transformer, mother.(8) this device is with liquid crystal touch screen, simple to operation.
Accompanying drawing explanation
Fig. 1 is this device use state block diagram.
Fig. 2 apparatus function unit module schematic diagram.
Fig. 3 master control borad unit block diagram.
Fig. 4 D/A conversion unit block diagram.
Fig. 5 feedback loop switch unit block diagram.
Fig. 6 AD conversion unit block diagram.
Fig. 7 network communication unit block diagram.
In figure: 101, master control borad unit; 101a, FPGA processor; 101b, high speed processor DSP; 102, network communication unit, 103, liquid crystal display, 104, D/A conversion unit; 104a, D/A modular converter; 104b, filtration module, 104c, protection module, 105, power amplification unit; 106, feedback loop switch unit; 106a, feedback loop control module, 106b, mutual inductor module, 107, AD conversion unit; 107a, protection module; 107b, signal condition module, 107c, A/D modular converter, 108, power supply provides unit.
Embodiment
Below in conjunction with accompanying drawing, describe the present invention:
The present invention provides a kind of intelligent substation two closed-loop testing devices at this, includes master control borad unit 101, D/A conversion unit 104, power amplification unit 105, feedback loop switch unit 106, AD conversion unit 107, liquid crystal display 103, network communication unit 102 and provides unit 108 to the power supply that device is realized voltage transitions.Power supply unit, is converted to alternating current 220V the voltage of the needed various grades of device.Wherein master control borad unit 101, complete data processing; Control liquid crystal display 103; Control digital-to-analogue unit 104; Control modulo unit 107, feedback loop switch unit 106, network communication unit 102.Wherein D/A conversion unit 104 of the present invention, for electric analog data-switching being become to analog current, voltage small-signal, is used to power amplification unit.Described power amplification unit 105, for converting analog current, voltage small-signal to electric current, the voltage signal that meets transformer substation communication standard.Which bar closed loop work described feedback loop switch unit 106, for selecting.AD conversion unit 107, for converting analog current, voltage small-signal to meet master control borad unit 101 standards digital quantity signal.Described liquid crystal display 103, for electric current, the amplitude of voltage signal, the phase angle information that shows that current automated closed-loop proving installation sends, and the error amount of system existence; And can select by the touch button of liquid crystal display the state of described pair of closed loop.Wherein said network communication unit 102, for receiving the emulated data of upper computer software emulation platform, and wireless IEEE1588 to time.
As shown in Figure 2: described master control borad unit 101 is connected communication with network communication unit 102, master control borad unit 101 is also connected with D/A conversion unit 104, D/A conversion unit 104 is connected communication with power amplification unit 105, feedback loop switch unit 106 is connected communication with power amplification unit 105 with AD conversion unit 107, AD conversion unit 107 is connected communication with master control borad unit 101, and liquid crystal display 103 connects master control borad unit 101.
Described D/A conversion unit 104 comprises D/A modular converter 104a, filtration module 104b and protection module 104c.Described D/A modular converter 104a is for converting simulated digital amount signal to simulating signal; Described filtration module 104b is for filtering the signal of frequency except power frequency 50Hz; Described protection module 104c is for isolating rear end D/A modular converter 104a and power amplification unit 105.
Described AD conversion unit 107 comprises protection module 107a, signal condition module 107b and A/D modular converter 107c; Described protection module 107a is used for isolating rear end analog-to-digital conversion module 107 and front end power amplification unit 105; Signal condition module 107b is for signal more than filtering 100Hz, and anti-aliasing filter.
Network communication unit 102 comprises communication network module and setting network module, and described communication network module is used for connecting host computer emulation platform, carries out data interaction; Described setting network module for main frame to time.
Feedback loop switch unit 106 comprises feedback loop control module 106a and mutual inductor module 106b, and described mutual inductor module 106b is for becoming the voltage small-signal that can directly be gathered by A/D modular converter 107c by the electric current, the voltage transitions that meet electric power standard.
Described master control borad unit 101 comprises FPGA processor 101a and goes out at a high speed three-dimensional DSP101b, and described FPGA processor 101a is responsible for processing from the emulated data of the emulation platform row of channels of going forward side by side and distributes, and described DSP is responsible for gathering output data and calculating.
The two closed loop test control methods of intelligent substation,
During normal transmission emulated data:
First, by extraneous software emulation platform emulation power failure, production figures amount, this system, by network communication unit 102, receives emulated data, and is stored in master control borad unit 101, after data channel allocation process, be ready for sending to D/A conversion unit 104;
Then, after D/A conversion unit 104 receives the digital quantity signal of master control borad unit 101, converting digital quantity signal to scope is-arrive+10V voltage analog signal of 10V that the processing of module 104b after filtering, obtains cleaner sine wave signal;
Then power amplification unit 105 zooms into the small signal analog quantity receiving to meet the large electric current of electric system standard, large voltage, and sends to the merge cells of access;
Then the mutual inductor module 106b of feedback loop switch unit 106, no-load voltage ratio as required becomes the large electric current sending, large voltage into scope for the-5V voltage signal to+5V;
Then the voltage signal after second-order filter sends AD conversion unit 107 to, converts simulation small-signal amount to digital quantity signal, and prepares to send to master control borad unit 101;
Last master control borad unit high speed processor DSP obtains after the digital quantity of AD conversion unit 107 and the digital quantity of upper layer software (applications) emulation, through Fourier, calculate difference between the actual amount sending and the amount of emulation, according to algorithm, calculate the modified value next time sending successively, by this modified value, give FPGA processor;
Corrective system drift and error:
First by the touch of LCD MODULE 103, FPGA processor transmits control signal to loop switch unit 106, inform that current device will enter system drift and error correction state, correction drift in the two closed loops of startup and the loop of error, all data that this timer shielding emulation platform sends, and FPGA will send zero to D/A conversion unit 104;
Then pass through power amplification unit 105, loop switch unit 106, AD conversion unit 107, the DC quantity existing in system is collected to master control borad unit 101, now high speed processor DSP101b calculates drift and the error existing in system, record this value, as the modified value of normal conversion and transmission emulated data.
In the present invention, master control borad unit 101 adopts the pattern of FPGA+DSP, and FPGA processor 101a is responsible for processing from the emulated data of the emulation platform row of channels of going forward side by side and distributes.High speed processor DSP101b is responsible for gathering output data and calculating.D/A conversion unit comprises D/A modular converter, filtration module and protection module.D/A modular converter is for converting simulated digital amount signal to simulating signal; Filtration module is for filtering the signal of frequency except power frequency 50Hz; Protection module is for isolating rear end D/A module and power amplification unit.
Power amplification unit comprises that current signal amplifies and voltage signal amplifies.Feedback loop switch unit 106 comprises feedback loop control module and mutual inductor module.Master control borad unit 101 is by a control signal line traffic control feedback control loop module, thus the work shape body of the two closed loops of selection; Mutual inductor module is for meeting the electric current of electric power standard, the voltage small-signal that voltage transitions becomes can directly be gathered by A/D chip, this module is only operated in while sending electric analog numerical value, and in corrective system error process, be without this module, direct current signal is directly given AD conversion unit.AD conversion unit 107 comprises protection module, signal condition module and A/D modular converter.Protection module is used for isolating rear end modulo unit and front end power amplifier unit; Signal condition module is for signal more than filtering 100Hz, and anti-aliasing filter.Network communication unit 102 comprises communication network module and setting network module, and described communication network module is used for connecting host computer emulation platform, carries out data interaction; Described setting network module for main frame to time.
Master control borad unit, D/A conversion unit, feedback loop switch unit, AD conversion unit, form this and install one of them closed loop, before normally sending emulated data for measurement mechanism, the inherent error of the existence of the feedback loop switch unit described in described AD conversion unit, power amplification unit and feedback control loop in through path.
Master control borad unit, D/A conversion unit, feedback loop switch unit, AD conversion unit, form this and install another closed loop, and while normally sending emulated data for measurement mechanism, device is given the Wave data of follow-up tested device and calculated error current value.
Claims (6)
1. the two closed-loop testing devices of intelligent substation, include master control borad unit (101), D/A conversion unit (104), power amplification unit (105), feedback loop switch unit (106), AD conversion unit (107), liquid crystal display (103), network communication unit (102) and provide the power supply of voltage that unit (108) is provided to each unit of device; Described master control borad unit (101) is connected communication with network communication unit (102), master control borad unit (101) is also connected communication with D/A conversion unit (104), D/A conversion unit (104) is connected communication with power amplification unit (105), feedback loop switch unit (106) is connected communication with power amplification unit (105) with AD conversion unit (107), AD conversion unit (107) is connected communication with master control borad unit (101), and liquid crystal display (103) connects master control borad unit (101); It is characterized in that: described master control borad unit (101) comprises FPGA processor and high speed processor DSP, described FPGA processor is responsible for processing from the emulated data of the emulation platform row of channels of going forward side by side and is distributed, and described high speed processor DSP is responsible for gathering output data and calculating;
Described proving installation moves in the following manner:
(1) while normally sending emulated data:
First, by extraneous software emulation platform emulation power failure, production figures amount, this device, by network communication unit (102), receives emulated data, and is stored in master control borad unit (101), after data channel allocation process, be ready for sending to D/A conversion unit (104);
Then, after D/A conversion unit (104) receives the digital quantity signal of master control borad unit (101), converting digital quantity signal to scope is-arrive+10V voltage analog signal of 10V, and the processing of module (104b) after filtering, obtains clean sine wave signal;
Then power amplification unit (105) zooms into the small signal analog quantity receiving electric current, the voltage that meets electric system standard, and sends to the merge cells of access;
Then the mutual inductor module (106b) of feedback loop switch unit (106), no-load voltage ratio as required converts the large electric current sending, large voltage unification to scope for the-5V voltage signal to+5V;
Then the voltage signal after second-order filter sends AD conversion unit (107) to, converts simulation small-signal amount to digital quantity signal, and prepares to send to master control borad unit (101);
Last master control borad unit (101) high speed processor DSP obtains after the digital quantity of AD conversion unit (107) and the digital quantity of upper layer software (applications) emulation, through Fourier, calculate difference between the actual amount sending and the amount of emulation, according to algorithm, calculate the modified value next time sending successively, by this modified value, give FPGA processor;
(2) means for correcting drift and error:
First by the touch of LCD MODULE (103), FPGA processor transmits control signal to feedback loop switch unit (106), inform that current device is by access to plant drift and error correction state, correction drift in the two closed loops of startup and the loop of error, all emulated data data and control signals that this timer shielding emulation platform sends, and make FPGA send zero to D/A conversion unit (104);
Then pass through power amplification unit (105), feedback loop switch unit (106), AD conversion unit (107), the DC quantity existing in device is collected to master control borad unit (101), now high speed processor DSP calculates drift and the error existing in device, record this value, as the modified value of normal conversion and transmission emulated data.
2. the two closed-loop testing devices of a kind of intelligent substation according to claim 1, is characterized in that: described D/A conversion unit (104) comprises D/A modular converter (104a), filtration module (104b) and protection module (104c);
Described D/A modular converter (104a) is for converting simulated digital amount signal to simulating signal; Described filtration module (104b) is for filtering the signal that disturbs power frequency 50Hz frequency; Described protection module (104c) is for isolating rear end D/A modular converter (104a) and power amplification unit (105).
3. the two closed-loop testing devices of a kind of intelligent substation according to claim 1, is characterized in that: described AD conversion unit (107) comprises protection module (107a), signal condition module (107b) and A/D modular converter (107c); Described protection module (107a) is for isolating rear end A/D modular converter (107c) and front end power amplification unit (105); Signal condition module (107b) is for signal more than filtering 100Hz, and anti-aliasing filter.
4. two closed-loop testing devices of a kind of intelligent substation according to claim 1, it is characterized in that: network communication unit (102) comprises communication network module and setting network module, described communication network module is used for connecting host computer emulation platform, carries out data interaction; Described setting network module for main frame to time, make this device be synchronized with major clock.
5. two closed-loop testing devices of a kind of intelligent substation according to claim 1, it is characterized in that: feedback loop switch unit (106) comprises feedback loop control module (106a) and mutual inductor module (106b), described mutual inductor module (106b) is for meeting the electric current of electric power standard, the voltage signal that voltage transitions becomes can directly be gathered by AD conversion unit.
6. two closed-loop testing devices of a kind of intelligent substation according to claim 1, it is characterized in that: described master control borad unit (101) comprises FPGA processor (101a) and high speed processor DSP(101b), described FPGA processor (101a) be responsible for to be processed from the emulated data of the emulation platform row of channels of going forward side by side and is distributed, and in corrective system drift process, revise drift value and revise emulation steady-state value in normal transmission emulated data process, described DSP is responsible for gathering output data and calculating, and draws modified value and controls liquid crystal display.
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Families Citing this family (6)
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| CN103033715B (en) * | 2012-12-25 | 2015-04-22 | 山东电力集团公司电力科学研究院 | Operating status detection system for area equipment in converting station |
| CN103713214B (en) * | 2013-12-24 | 2016-06-29 | 国家电网公司 | A kind of intelligent substation relay protection closed loop test system |
| CN105116248B (en) * | 2015-08-05 | 2018-09-21 | 国家电网公司 | Relay protection device of intelligent substation automated closed-loop test method |
| CN105141475B (en) * | 2015-08-18 | 2018-04-13 | 电子科技大学 | A kind of intelligent substation station level equipment assistant adjustment system |
| CN106787191B (en) * | 2016-12-22 | 2019-11-19 | 电子科技大学 | A kind of information centralized control equipment of intelligent substation integration power-supply system |
| CN111323672B (en) * | 2020-04-14 | 2022-03-25 | 广州思泰信息技术有限公司 | Remote availability detection device for substation automation equipment |
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