CN103401254A - Monitoring device of automatic reactive compensation system for high-low voltage power distribution network - Google Patents
Monitoring device of automatic reactive compensation system for high-low voltage power distribution network Download PDFInfo
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- CN103401254A CN103401254A CN2013103595264A CN201310359526A CN103401254A CN 103401254 A CN103401254 A CN 103401254A CN 2013103595264 A CN2013103595264 A CN 2013103595264A CN 201310359526 A CN201310359526 A CN 201310359526A CN 103401254 A CN103401254 A CN 103401254A
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Abstract
The invention relates to a monitoring device of an automatic reactive compensation system for a high-low voltage power distribution network. The monitoring device comprises a power distribution network operation data monitoring module and an SVG module operation data monitoring module, wherein the power distribution network operation data monitoring module transmits operation parameters of the power distribution network to an SVG control module via a communication bus in real time; a temperature detection unit of the SVG module operation data monitoring module transmits detected real-time temperature values of all parts of the SVG control module to the SVG control module via a communication bus in real time; a thyristor switch capacitor bank operation parameter monitoring unit of the SVG module operation data monitoring module is used for monitoring whether a capacitor bank operates within a normal working region; a capacitor bank thyristor switch monitoring unit of the SVG module operation data monitoring module monitors the on/off state of a thyristor switch in real time, and is used for monitoring whether the thyristor switch operates normally as per a thyristor switching signal sent out by the SVG control module.
Description
Technical field
The present invention relates to a kind of monitoring device of high and low voltage electric distribution net auto-reactive compensation system.
Background technology
The problem that extensively exists in the high and low voltage electric distribution system is power supply reliability, power quality problem and efficiency of transmission problem.Efficiency of transmission wherein refers to that distribution system is delivered to user's electric energy, with the ratio of electric energy from obtaining electric power transmission network.Transfer efficiency is relevant to many factors, and one of them major issue is exactly the reactive power compensation problem.Alternating current is by actual loading the time, because it can not be pure capacitive or pure perception, made the considerable part electric energy not do work and be consumed, become reactive power, therefore need to the reactive power in circuit be compensated, this is the task that reactive power compensation need to complete.
Present reactive-load compensation equipment mainly contains synchronous compensator, switch on-off fixed capacity, static reacance generator (SVG) and this four class of intelligent powerless compensation checkout gear.Wherein, the response speed of synchronous compensator is slow, and noise is large, and loss is large, and technological obsolescence belongs to filtering technique; The response compensation way of switch on-off fixed capacity is slow, continuous controlled ability; Although SVG has technical limitation at present, belong to the minority demonstration project stage, but SVG is a kind of more advanced novel static var compensator, be the important component part of flexible flexible AC transmitting system (FACTS) technology and customization electric power (CP) technology, represented the developing direction of modern reactive power compensation device.
SVG type compensation arrangement adopts power factor to compare and switching, is around the parameter of mounting points and controls, and can't consider the situation optimal control of whole distribution line.The SVG reactive compensation system lacks the Real-Time Monitoring to power distribution network and capacitor running status, causes the operational efficiency of system and security performance not high.Present SVG auto-compensation mode all for sampling number according to calculating because lack and exchange between controller, the algorithm of employing falls behind, controller comprehensively the whole network ruuning situation is that the distribution of reactive power flow is tending towards the most reasonable, economic benefit reaches the best.
Summary of the invention
The object of the present invention is to provide a kind of monitoring device of high and low voltage electric distribution net auto-reactive compensation system, this monitoring device can be real-time the running status of monitoring high and low voltage electric distribution net and the running status of SVG device, can make reactive compensation system can be automatically, accurately for power distribution network provides reactive power compensation, and guarantee operation safely and reliably.
To achieve these goals, the invention provides a kind of monitoring device of high and low voltage electric distribution net auto-reactive compensation system, wherein this auto-reactive compensation system have the SVG module, be used to controlling SVG control module and the communication bus of this SVG module, this monitoring device comprises:
Operation of power networks data monitoring module, for the operational factor of Real-Time Monitoring power distribution network, this operational factor comprises voltage, electric current and frequency;
SVG module service data monitoring modular, for detecting in real time the operational factor of each parts of SVG module, described SVG module service data monitoring modular comprises temperature detecting unit, opening-closing capacitor bank operational factor monitoring means and capacitor group switching switch monitoring means;
It is characterized in that:
This operation of power networks data monitoring module is given this SVG control module by the operational factor of power distribution network by this transmission in real time, this SVG control module is determined reactive power compensation amount Δ P according to the operational factor that transmits, and the switching unit of controlling the SVG module according to this Δ P by appropriate capacitor switching in power distribution network, to realize reactive power compensation;
The real time temperature value that the temperature detecting unit of this SVG module service data monitoring modular will detect each parts in the SVG module in real time by transmission to this SVG control module, this SVG control module compares real time temperature value and the set point of these each parts, if find that the temperature value of certain parts or some parts exceeds the threshold value that set point is certain, start cooling unit in the SVG module associated components of SVG module is carried out cooling, to ensure the safe operation of reactive compensation system;
The opening-closing capacitor bank operational factor monitoring means of this SVG module service data monitoring modular, detect in real time terminal voltage value, the current value of the capacitor group that is in running status, and this magnitude of voltage and current value are sent to this SVG control module by this bus, be used to judging the capacitor group, whether operate in the normal operation interval;
The capacitor group switching switch monitoring means of this SVG module service data monitoring modular, detect in real time the break-make situation of this fling-cut switch, and this break-make situation is sent to this SVG control module by bus, be used to judging the switching signal whether fling-cut switch sends according to the SVG control module, working.
For achieving the above object, further, the service data monitoring modular comprises the multiple spot detecting unit, operational factor for detection of the multiple spot of power distribution network, to reflect accurately more comprehensively the running status of power distribution network, wherein this multiple spot detecting unit comprises the detecting unit at the first and last load node place that is distributed in distribution line at least.
For achieving the above object, further, described temperature detecting unit comprises the infrared temperature checkout equipment.
The monitoring device of auto-reactive compensation system provided by the invention, traditional single-point power distribution network operational parameter detection is expanded to the multiple spot operational parameter detection, and then improved power distribution network real time execution parameter monitoring precision and comprehensive, be conducive to improve precision and the efficiency of reactive power compensation; In addition, by temperature, the operational factor of switched capacitor and the operational factor of fling-cut switch of real-time each parts of detection SVG, guarantee the security of operation of whole system, extended the useful life of whole system.
The accompanying drawing explanation
Fig. 1 is the connection diagram of high and low voltage electric distribution net auto-reactive compensation system and power distribution network;
Fig. 2 is the monitoring device of high and low voltage electric distribution net auto-reactive compensation system of the present invention and the connection diagram of high and low voltage electric distribution net auto-reactive compensation system;
Fig. 3 be high and low voltage electric distribution net auto-reactive compensation system of the present invention monitoring device structured flowchart with and and connection diagram;
Embodiment
Referring to Fig. 1, the monitoring device 100 of high and low voltage electric distribution net auto-reactive compensation system is the reactive compensation system for the high and low voltage electric distribution network, in typical high and low voltage electric distribution net, comprise high-tension distributing line 300, high and low voltage electric distribution transformer 400, low-voltage distribution wire 200, wherein high-tension distributing line 300 is positioned at the high-pressure side of high and low voltage electric distribution transformer 400, low-voltage distribution wire 300 is positioned at the low-pressure side of high and low voltage electric distribution transformer 400, on low-voltage distribution wire 200, be connected with a plurality of load 1-n, typically these loads are resistive load and inductive load.The effect of automatic reactive compensator 100 of the present invention is that the reactive power that consumes be used to compensating inductive load, improve power factor (PF), and remain the voltage stabilization of distribution network.
Referring to 2-3, high and low voltage electric distribution net auto-reactive compensation system comprises: SVG module 2, and be used to power distribution network that reactive power compensation is provided, it comprises: capacitor group 21,23,25,27, capacitor group switching unit 22,24,26,28 and cooling unit 29; Monitoring device 4, for the operational factor of Real-Time Monitoring power distribution network and SVG module 2; Communication bus 3, for the internal data communication of reactive compensation system.
Monitoring device 4 comprises: operation of power networks data monitoring module 41, and for the operational factor of Real-Time Monitoring power distribution network, this operational factor comprises voltage, electric current and frequency; SVG module service data monitoring modular 42, for detecting in real time the operational factor of SVG module 2 each parts, described SVG module service data monitoring modular 42 comprises temperature detecting unit, opening-closing capacitor bank operational factor monitoring means and capacitor group switching switch monitoring means.
This operation of power networks data monitoring module 41 is transferred to this SVG control module 1 by the operational factor of power distribution network by this communication bus 3 in real time, this SVG control module 1 is determined reactive power compensation amount Δ P according to the operational factor that transmits, and the switching unit of controlling the SVG module according to this Δ P by appropriate capacitor switching in power distribution network, to realize reactive power compensation.Wherein the computational methods of Δ P can adopt existing any reactive power calculating method to obtain, and typically can utilize voltage magnitude, current amplitude and electric current and voltage phase difference to calculate reactive power compensation amount Δ P.
The real time temperature value that the temperature detecting unit of this SVG module service data monitoring modular 42 will detect each parts in SVG module 2 in real time by transmission to this SVG control module 1, this SVG control module 1 compares real time temperature value and the set point of these each parts, if find that the temperature value of certain parts or some parts exceeds the threshold value that set point is certain, the associated components that starts 29 pairs of SVG modules 1 of cooling unit in SVG module 2 carries out cooling, to ensure the safe operation of reactive compensation system.Described temperature detecting unit comprises the infrared temperature checkout equipment.
Typically, described cooling unit 29 is comprised of air cooler, such as fan group and air pipe, consisting of, makes ventilating opening spread all over all parts of SVG module.At Duct design, be ventilating opening can be set for and can control open and close by the SVG control module.Like this can be targetedly some be crossed to thermal part and carry out coolingly, improve cooling effectiveness and also reduce energy consumption.If after the startup cooling device, the temperature value that certain parts or some parts still detected exceeds the threshold value that set point is certain, by the SVG control module, is interrupted the operation of these parts.Such as when the first capacitor group 21 and the logical operation of the second capacitor group 23 1, the temperature value of the second capacitor group 23 detected higher than the temperature value of setting, by SVG control module 1, start cooling unit 29, for example start the fan group, and open the ventilating opening of the second capacitor group 23, to the second capacitor group 23, carry out cooling, if after after a while, the temperature of the second capacitor group 23 is still higher than set point, by SVG control module 1, send control signal, interrupt the operation of the second capacitor group 23.
The opening-closing capacitor bank operational factor monitoring means of this SVG module service data monitoring modular 42 has four monitoring subelements, be respectively used to detect in real time terminal voltage value, the current value of the first capacitor group 21, the second capacitor group 23, the 3rd capacitor group 25 and the 4th capacitor group 27 that are in running status, and this magnitude of voltage and current value are sent to this SVG control module 1 by this communication bus 3, be used to judging the capacitor group, whether operate in the normal operation interval.The mode of judgement can be: the terminal voltage value that will detect and current value and set point compare, if difference surpasses certain threshold value, judge that this capacitor group is in abnormal operating state.Wherein this first power capacitor bank 21, the second power capacitor bank 23, the 3rd power capacitor bank 25 and the 4th power capacitor bank 27, this first to fourth capacitor group, have respectively 10000 μ f, 1000 μ f, 100 μ f, the capacitance level of 10 μ f.
The capacitor group switching switch monitoring means of this SVG module service data monitoring modular 42 has four monitoring subelements, be respectively used to detect in real time the break-make situation of this first capacitor group switching switch 22, the second capacitor group switching switch 24, the 3rd capacitor group switching switch 26 and the 4th capacitor group switching switch 28, and this break-make situation is sent to this SVG control module 1 by bus, be used to judging the switching signal whether fling-cut switch sends according to the SVG control module, working.Whether described capacitor group switching switch monitoring means has controllable silicon driving voltage and current detecting subelement, normal for detection of the driving of the transistor switching unit that consists of controllable silicon.The mode of judgement can be: the controllable silicon driving voltage value that will detect and current value and set point compare, if difference surpasses certain threshold value, judge that this capacitor group switching switch is in abnormal operating state.
This service data monitoring modular 41 comprises the multiple spot detecting unit, operational factor for detection of the multiple spot of power distribution network, to reflect accurately more comprehensively the running status of power distribution network, wherein this multiple spot detecting unit comprises the head end load 1 that is distributed in distribution line and the detecting unit of end load n Nodes at least.This multiple spot detecting unit can comprise voltage detection device, current detecting equipment and phase detection apparatus.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, make some being equal to substitute or obvious modification, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.
Claims (3)
1. the monitoring device of a high and low voltage electric distribution net auto-reactive compensation system, wherein this auto-reactive compensation system have the SVG module, be used to controlling SVG control module and the communication bus of this SVG module, this monitoring device comprises:
Operation of power networks data monitoring module, for the operational factor of Real-Time Monitoring power distribution network, this operational factor comprises voltage, electric current and frequency;
SVG module service data monitoring modular, for detecting in real time the operational factor of each parts of SVG module, described SVG module service data monitoring modular comprises temperature detecting unit, opening-closing capacitor bank operational factor monitoring means and capacitor group switching switch monitoring means;
It is characterized in that:
This operation of power networks data monitoring module is given this SVG control module by the operational factor of power distribution network by this transmission in real time, this SVG control module is determined reactive power compensation amount Δ P according to the operational factor that transmits, and the switching unit of controlling the SVG module according to this Δ P by appropriate capacitor switching in power distribution network, to realize reactive power compensation;
The real time temperature value that the temperature detecting unit of this SVG module service data monitoring modular will detect each parts in the SVG module in real time by transmission to this SVG control module, this SVG control module compares real time temperature value and the set point of these each parts, if find that the temperature value of certain parts or some parts exceeds the threshold value that set point is certain, start cooling unit in the SVG module associated components of SVG module is carried out cooling, to ensure the safe operation of reactive compensation system;
The opening-closing capacitor bank operational factor monitoring means of this SVG module service data monitoring modular, detect in real time terminal voltage value, the current value of the capacitor group that is in running status, and this magnitude of voltage and current value are sent to this SVG control module by this bus, be used to judging the capacitor group, whether operate in the normal operation interval;
The capacitor group switching switch monitoring means of this SVG module service data monitoring modular, detect in real time the break-make situation of this fling-cut switch, and this break-make situation is sent to this SVG control module by bus, be used to judging the switching signal whether fling-cut switch sends according to the SVG control module, working.
2. device as claimed in claim 1, it is characterized in that, described service data monitoring modular comprises the multiple spot detecting unit, operational factor for detection of the multiple spot of power distribution network, to reflect accurately more comprehensively the running status of power distribution network, wherein this multiple spot detecting unit comprises the detecting unit at the first and last load node place that is distributed in distribution line at least.
3. device as claimed in claim 1 or 2, is characterized in that, described temperature detecting module comprises the infrared temperature checkout equipment.
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| CN103743981A (en) * | 2014-01-17 | 2014-04-23 | 海南金盘电气有限公司 | Testing system for static var generator |
| CN109917222A (en) * | 2019-03-06 | 2019-06-21 | 湖北工业大学 | A kind of capacitance component is comprehensive to be monitored on-line and health status diagnostic device and method |
| CN112485577A (en) * | 2020-12-08 | 2021-03-12 | 南京智睿能源互联网研究院有限公司 | Low-voltage testing device for power electronic equipment |
| US11016129B1 (en) | 2017-10-20 | 2021-05-25 | Alarm.Com Incorporated | Voltage event tracking and classification |
| US11391479B2 (en) | 2019-01-24 | 2022-07-19 | Alarm.Com Incorporated | HVAC service performance |
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