CN109921432A - A kind of power distribution network synthesis for end concentrated load is idle voltage regulating compensating device - Google Patents
A kind of power distribution network synthesis for end concentrated load is idle voltage regulating compensating device Download PDFInfo
- Publication number
- CN109921432A CN109921432A CN201910314097.6A CN201910314097A CN109921432A CN 109921432 A CN109921432 A CN 109921432A CN 201910314097 A CN201910314097 A CN 201910314097A CN 109921432 A CN109921432 A CN 109921432A
- Authority
- CN
- China
- Prior art keywords
- voltage
- power
- distribution network
- circuit
- breaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Control Of Electrical Variables (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of idle voltage regulating compensating device of the power distribution network synthesis for end concentrated load, comprehensive idle voltage regulating compensating device is made of compensation system and control system.Compensation system includes capacitor, damping circuit, voltage limiter, bypass breaker and controllable breaker and high-speed switch, to promote the quality of voltage under continuous running voltage.Control system includes that current transformer, voltage transformer, voltage comparator, power-factor monitoring equipment, power factor comparator, logical operation circuit and trigger circuit are constituted.The device is adjusted to series capacitor compensation or parallel capacitive compensation working condition by controllable breaker, to guarantee the adaptability and reliability of reactive compensation by the voltage and power factor of identification load bus.Present invention is mainly used for the power quality for improving power distribution network, it is particularly suitable for concentrating on load the voltage compensation of distribution network line end and the low big load of concentration of power factor.
Description
Technical field
The invention belongs to power system reactive power compensations, voltage adjustment technique field, and in particular to one kind is concentrated for end
The power distribution network synthesis of load is idle voltage regulating compensating device.
Background technique
Quality of voltage generally includes voltage deviation, electric voltage frequency deviation, Voltage unbalance, voltage fluctuation and flicker, voltage
Harmonic wave etc..Voltage deviation confession under directions electric system is under normal operating mode, and the virtual voltage and nominal voltage of a system of a certain node are (i.e.
Voltage rating) difference and the ratio between nominal voltage of a system percentage.Voltage deviation is one of important indicator of quality of voltage.
Reasonable adjustment power distribution network is the basic of guarantee user power utilization quality along line voltage.It is filled using parallel capacitive compensation
Setting can be improved power factor, reduces active loss, reduce voltage landing；Capacitive can be provided using compensator with series capaci tance
The emotional resistance of route is offset in impedance, improves quality of voltage along route.But all there is respective limitation in both modes.When
It, can not using traditional single Electric capacity compensation device or parallel condenser compensation device when power distribution network end is with big load is concentrated
Adapt to the capacity or power factor change of load.For different loads, the reactive power compensation technology of use is also different, therefore by must
Develop a kind of synthesis reactive compensator.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of idle pressure regulation of the power distribution network synthesis for end concentrated load
Compensation device is applied in distribution network system, for improving quality of voltage in distribution network system.
In order to achieve the above objectives, the idle regulating compensation of a kind of power distribution network synthesis for end concentrated load of the present invention
Device is applied in distribution network system.Comprehensive idle voltage regulating compensating device includes a capacitor C, inductance coil L, one
Platform damping resistance R, a voltage limiter F, the first circuit breaker Q F1, the second circuit breaker Q F2, third circuit breaker Q F3, bypass breaker
QF4 and high-speed switch K, first to third breaker is controllable breaker.
For compensation system, capacitor C is used to compensate the voltage landing of distribution network line generation, keeps load bus voltage full
The requirement of power quality as defined in foot.Damping circuit L and damping resistance R be in parallel, connect again with a high-speed switch K, constitutes and hinders the
One circuit breaker Q F1 is connected between capacitor C and load Q, and the second circuit breaker Q F2 is connected between capacitor C and grounding body, the
Three circuit breaker Q F3 are connected between the source side of capacitor C and load Q.When the first circuit breaker Q F1 closure, the second circuit breaker Q F2
When disconnection, third circuit breaker Q F3 are disconnected, comprehensive idle voltage regulating compensating device is in series compensation working condition；When the first open circuit
When device QF1 is disconnected, the second circuit breaker Q F2 closure, third circuit breaker Q F3 are closed, comprehensive idle voltage regulating compensating device is in parallel connection
Compensation work state.
Control system includes power supply, current transformer, voltage transformer, voltage comparator, power-factor monitoring equipment, function
Rate factor comparator, logical operation circuit and trigger circuit.
Power-supply system carries out energy-absorbing energy storage using solar panel, by booster circuit and voltage regulator circuit to control system
And other power electronic devices power supply.
Voltage transformer monitors the voltage of line end, and power-factor monitoring equipment passes through voltage transformer and Current Mutual Inductance
Device monitors power factor, and signal is passed to voltage comparator and power factor comparator by them, and two comparators export logic
For signal to logical operation circuit, operation result, which is exported, generates the control circuit that breaker is sent into pulse to trigger circuit.
Compared with prior art, the present invention at least has technical effect beneficial below: utilizing the voltage constantly detected
Amplitude and power factor bicharacteristic amount are compared identification, two kinds of working conditions of series capacitor compensation and parallel capacitive compensation it
Between controllably switch according to setting mode.The voltage ratio when the value that voltage transformer and power-factor monitoring equipment monitoring arrive is relatively low
Electric potential signal will be transmitted to logical operation circuit compared with device and power factor comparator, and operation result passes to trigger circuit, triggering
Circuit spreads out of suitable pulse to three controllable breakers, is switched to parallel capacitive compensation mode by switch motion device, this
When, power factor can be improved in parallel capacitive compensation, reduces the voltage drop that load current generates on line inductance, to improve
To the supply voltage quality of load；Similarly, when system power factor, which improves, is more than threshold value, device will be switched to series capacitance benefit
Mode to be repaid, under this mode, is equivalent to the reactance for balancing out a part of route after installing series capacitor compensation additional, voltage landing becomes smaller,
To improve the supply voltage quality to load；Accuracy rate is high, controls to adjust fastly, performance is stablized.
Compared to phase modifier and the reactive-load compensation equipments such as static reactive generator costly, this equipment is without complexity
And the complete power electronic devices of higher cost；This integration of equipments series capacitor compensation equipment is compensated with point appearance in parallel and is set simultaneously
Standby, cost substantially reduces compared with two equipment.The compensation system and control system of this equipment are independent, are individually replaced any
Part is all more easily.
It further, further include voltage limiter F, voltage limiter F is connected in parallel on the both ends capacitor C, and voltage limiter F is for inhibiting to go out
The overvoltage and electric current for integrating idle voltage regulating compensating device both ends now prevent overvoltage, overcurrent damage equipment.
It further, further include damping circuit L, damping resistance R and high-speed switch K, damping circuit L and damping resistance R
Parallel connection constitutes damping circuit, and damping circuit and high-speed switch K connect to form bypass branch, and bypass branch and capacitor C are in parallel, by
It is limited in the energy absorption capability and voltage tolerance of voltage limiter F, can not absorb big energy for a long time, therefore
It is bypassed in the tolerance time that voltage limiter allows by high-speed switch quick response.Damping circuit is for when inhibiting breaker closing
The discharge current of capacitor C and oscillation.
Further, capacitor C is also in parallel with bypass breaker QF4, makes in the idle voltage regulating compensating device maintenance of synthesis
With can be by device integral bypass.
Further, the voltage of control system is powered using solar panel, and the power supply of power electronic devices is derived from too
Positive energy, long-acting, clean and environmental protection.
Further, voltage comparator includes two voltage input ports and an output port, an input port
Voltage transformer is connect, another input port connects comparison voltage, and comparison voltage threshold value is chosen for the 93% of specified phase voltage, and 93%
It is the voltage magnitude requirement of national regulations, needs to take certain low-voltage control measures if lower than 93%.
Further, the threshold value of power factor comparator is chosen for, and 0.7, it is conveniently used if power factor is lower than 0.7
Parallel capacitive compensation is suitable for series capacitor compensation higher than 0.7.
Further, voltage transformer and current transformer are electromagnetic transformer, electromagnetic transformer error characteristics
It is better than capacitance type mutual inductor with transient characterisitics, and output capacity is high.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of the idle voltage regulating compensating device of synthesis of the invention；
Fig. 2 is the circuit diagram of the idle voltage regulating compensating device of synthesis of the invention；
Fig. 3 is the system construction drawing of the idle voltage regulating compensating device control system of synthesis of the invention.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
With the continuous development of power distribution network power supply capacity, power transmission radius, power distribution network problem caused by load also becomes increasingly conspicuous.
When distribution network line is longer, and end inductive load is heavier, line drop is serious, solves pressure drop Single-issue and preferably uses overcompensation
The compensator with series capaci tance of state.But larger for radius of electricity supply, power factor is low, load weight and the serious power distribution network of pressure drop
System, series capacitor compensation is difficult to realize to the compensation along line voltage, at this time more preferably using parallel capacitive compensation improve power because
Number, and then reduce line drop.The present invention passes through the voltage, electric current of constantly detection line road, according to pressure drop and power factor control
The working condition of switching equipment processed realizes that series capacitor compensation is integrated with parallel capacitive compensation, is suitable for distribution network line
The different load in end.The present invention is suitable for the power distribution network that end concentrates big load with low power factor.
Installing synthesis reactive compensator additional in distribution network line end has low power factor concentration big negative compensation end
The route of lotus is reasonable.Line end installs easy access here close to load side, by compensation equipment, can reduce O&M people
The workload of member.Meanwhile the case where being concentrated with larger inductive load for end, compensator with series capaci tance can pass through capacitor
Effect improves node voltage, and parallel condenser compensation device can reduce active loss by increase power factor, and then improve section
Point voltage.
Fig. 1 is the connection schematic diagram of the idle voltage regulating compensating device of synthesis of the invention, and the present apparatus is divided into two parts: compensation is adjusted
Pressure system and control system.Present apparatus two parts are explained by tri- phase composition of A, B, C, following all devices with a phase.
Fig. 2 is the circuit diagram of the idle voltage regulating compensating device of synthesis of the invention, the thyristor controlled series capacitor regulator
Break including a capacitor C, an inductance coil L, a damping resistance R, a voltage limiter F, the first circuit breaker Q F1, second
Road device QF2, third circuit breaker Q F3, bypass breaker QF4 and high-speed switch K, first to third breaker is that controllable vacuum is disconnected
Road device.Capacitor C is connected between the power supply side and load side of power distribution network, and voltage limiter F is connected in parallel on the both ends capacitor C；Damping electricity
Feel L and damping resistance R parallel connection constitutes damping circuit, the damping circuit and high-speed switch K connect to form bypass branch, the side
Road branch and capacitor C are in parallel, and capacitor C is also in parallel with bypass breaker QF4.Bypass breaker QF4 is connected to power distribution network
Between power supply side and load side.
Capacitor C is the core component of idle voltage regulating compensating device, and the size of capacitance and access are exited and directly affect edge
The compensation effect of line voltage.Play the role of being promoted under series compensation state and can improve load under line voltage, shunt compensation state
Power factor, for compensate distribution network line end generation voltage landing.
Voltage limiter F is gapless metal-oxide lighting arrester, is connected in parallel on the both ends capacitor C, is for inhibiting to be likely to occur
Overvoltage and electric current at the idle voltage regulating compensating device both ends of synthesis prevent overvoltage, overcurrent damage equipment.When device both ends
Capacitor both end voltage increased dramatically when there is overvoltage because of a variety of causes such as the system failures, such as when load-side generation short circuit, benefit
Ability and characteristic is timely responded to the excellent nonlinear wind vibration of voltage limiter, big shove, it can effectively over-voltage
It is shunted with timely, protective condenser.
Inductance coil L plays damping action composition damping circuit in parallel with damping resistance, then goes here and there with a fast breaker K
Connection, it is whole in parallel with capacitor C.Due to the limitation of manufacturing technology and cost, the energy absorption capability and voltage of voltage limiter F is resistance to
It is limited by ability, big energy can not be absorbed for a long time, therefore by quickly opening in the tolerance time that voltage limiter allows
Quick response is closed to be bypassed.The discharge current of capacitor C and oscillation when damping circuit is for inhibiting breaker closing.
Bypass breaker QF4 is connected in parallel on series compensation equipment both ends, uses in the idle voltage regulating compensating device maintenance of synthesis,
It can be by device integral bypass.
First circuit breaker Q F1 is connected between capacitor C and load Q, and the second circuit breaker Q F2 is connected to capacitor C and connects
Between ground body, third circuit breaker Q F3 is connected between the source side of capacitor C and load Q.When the first circuit breaker Q F1 closure, the
When two circuit breaker Q F2 are disconnected, third circuit breaker Q F3 is disconnected, comprehensive idle voltage regulating compensating device is in series compensation working condition；
When the first circuit breaker Q F1 is disconnected, the second circuit breaker Q F2 closure, third circuit breaker Q F3 are closed, comprehensive idle regulating compensation dress
It sets in shunt compensation working condition.Three breakers have control circuit, can receive the pulse letter from control system
Number, timely respond to the folding condition of switching breaker.
Control system includes power supply, current transformer, voltage transformer, voltage comparator, power-factor monitoring equipment, function
Rate factor comparator, logical operation circuit and trigger circuit.
Power-supply system carries out energy-absorbing energy storage using solar panel, by booster circuit and voltage regulator circuit to control system
It powers with other power electronic devices.
Voltage transformer and current transformer are electromagnetic transformer.The voltage of voltage transformer monitoring line end,
The electric current that current transformer monitoring line end flows through.Monitoring signals are both sent into power-factor monitoring equipment, while electricity
Signal is also sent into voltage comparator by pressure mutual inductor.
Power-factor monitoring equipment receives the signal from voltage transformer and current transformer, is obtained by internal circuit
Power factor, the voltage signal that output matches with power factor, power factor range are 0 to 1, corresponding output voltage signal
It is 0 to 10V.The voltage signal of output is sent into power factor comparator.
Voltage comparator is made of two voltage input ports and an output end.One input port connects mutual induction of voltage
Device, constantly acquisition operation phase voltage, another input terminal are threshold voltage, and voltage is set as specified operation phase voltage
93%, the i.e. minimum of power quality requirement.Voltage comparator output termination logical operation circuit, when working voltage is higher than threshold value
When voltage, high potential is exported；When lower than threshold voltage, low potential is exported.
The essence of power factor comparator is also a voltage comparator, by two voltage input ends and an output end structure
At.Input terminal one terminates power-factor monitoring equipment, receives comparison voltage, and the other end is threshold voltage, and voltage is set as 7V,
Corresponding 0.7 power factor.Power factor comparator output terminal connects logical operation circuit, when collected voltage is higher than threshold voltage
When, export high potential；When lower than threshold voltage, low potential is exported.
Logical operation circuit is made of two input terminals and two output ends, and two values of input are voltage comparator and function
The output valve of rate factor comparator.Table 1 is the truth table of logical operation circuit, wherein 0 represents zero potential signal, 1 represents posivtive spike
It is worth high potential signal, -1 represents negative peak high potential signal.
Table 1
| Voltage comparator output | The output of power factor comparator | Logical operation output 1 | Logical operation output 2 |
| 1 | 0 | -1 | 1 |
| 1 | 1 | 0 | 0 |
| 0 | 0 | -1 | 1 |
| 0 | 1 | 1 | -1 |
The two-way output signal of logical operation circuit contacts Power Generation Road.1 the first circuit breaker Q F1 of control of logical operation output,
2 control the second circuit breaker Q F2 and third circuit breaker Q F3 of logical operation output, wherein 0 represents that breaker is failure to actuate, 1 represents open circuit
Device closed procedure, -1 represent breaker opening operation.
Trigger circuit is responsible for receiving the two-way electric potential signal of logical operation circuit, later according to 1 output of logical operation output
Current potential amplitude export corresponding pulse signal give the first circuit breaker Q F1 control circuit, according to logical operation output 2 output
Current potential amplitude exports the control circuit of corresponding pulse signal the second circuit breaker Q F2 and third circuit breaker Q F3, guarantees vacuum circuit breaker
Device movement.
The invention proposes a kind of comprehensive idle voltage regulating compensating devices of the big load of concentration for power distribution network low power factor.
Comprehensive idle voltage regulating compensating device is made of compensation system and control system.Compensation system is mainly by capacitor, damping circuit, limit
Depressor, bypass breaker and controllable breaker, high-speed switch etc. are constituted, to promote the quality of voltage under continuous running voltage.
Control system is mainly by power supply, current transformer, voltage transformer, voltage comparator, power-factor monitoring equipment, power factor
Comparator, logical operation circuit and trigger circuit are constituted.The device is led to by the voltage and power factor of identification load bus
Cross controllable breaker and be adjusted to series capacitor compensation or parallel capacitive compensation working condition, with guarantee reactive compensation adaptability and
Reliability.Power supply is current transformer, voltage transformer, voltage comparator, power-factor monitoring equipment, power factor compare
Device, logical operation circuit and trigger circuit provide working power.Present invention is mainly used for the power qualities for improving power distribution network, especially
It is suitable for the voltage compensation of distribution network line end and the low big load of concentration of power factor is concentrated on to load.Device three-phase
It is integrated, structure is simple, light.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (8)
1. a kind of power distribution network synthesis for end concentrated load is idle voltage regulating compensating device, which is characterized in that including capacitor C
And breaker, the first circuit breaker Q of breaker F1, the second circuit breaker Q F2 and third circuit breaker Q F3, first breaker
QF1 is connected between capacitor C and load Q, and the second circuit breaker Q F2 is connected between capacitor C and grounding body, and the third is disconnected
Road device QF3 is connected between the source side of capacitor C and load Q, the first circuit breaker Q F1, the second circuit breaker Q F2 and third
The pulse signal that circuit breaker Q F3 is sent according to control system switches the folding condition of breaker；
Control system includes current transformer, voltage transformer, voltage comparator, power-factor monitoring equipment, power factor ratio
Compared with device, logical operation circuit and trigger circuit,
The input terminal of the voltage transformer and current transformer is connect with power grid, the output end and voltage ratio of voltage transformer
Input terminal compared with device connects, the output end of the output end of voltage transformer and current transformer with power-factor monitoring equipment
Input terminal connection, the output end of power-factor monitoring equipment are connect with the input terminal of power factor comparator, voltage comparator
The output end of output end and power factor comparator is connect with trigger circuit, and trigger circuit is used to switch the folding shape of breaker
State.
2. the idle voltage regulating compensating device of a kind of power distribution network synthesis for end concentrated load according to claim 1,
It is characterized in that, further includes voltage limiter F, the voltage limiter F is connected in parallel on the both ends capacitor C.
3. the idle voltage regulating compensating device of a kind of power distribution network synthesis for end concentrated load according to claim 2,
It is characterized in that, further includes damping circuit L, damping resistance R and high-speed switch K, the damping circuit L and damping resistance R in parallel
Damping circuit is constituted, the damping circuit and high-speed switch K connect to form bypass branch, and the bypass branch and capacitor C are simultaneously
Connection.
4. the idle voltage regulating compensating device of a kind of power distribution network synthesis for end concentrated load according to claim 1,
It is characterized in that, the capacitor C is also in parallel with bypass breaker QF4.
5. the idle voltage regulating compensating device of a kind of power distribution network synthesis for end concentrated load according to claim 1,
It is characterized in that, control system is powered by solar panel.
6. the idle voltage regulating compensating device of a kind of power distribution network synthesis for end concentrated load according to claim 1,
It is characterized in that, the voltage comparator includes two voltage input ports and an output port, one of input port
It is connect with voltage transformer, another input port connects comparison voltage, and comparison voltage threshold value is the 93% of specified phase voltage.
7. the idle voltage regulating compensating device of a kind of power distribution network synthesis for end concentrated load according to claim 1,
It is characterized in that, the threshold value of the power factor comparator is 0.7.
8. the idle voltage regulating compensating device of a kind of power distribution network synthesis for end concentrated load according to claim 1,
It is characterized in that, the voltage transformer and current transformer are electromagnetic transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910314097.6A CN109921432B (en) | 2019-04-18 | 2019-04-18 | Comprehensive reactive power voltage regulation compensation device for power distribution network with tail end concentrated loads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910314097.6A CN109921432B (en) | 2019-04-18 | 2019-04-18 | Comprehensive reactive power voltage regulation compensation device for power distribution network with tail end concentrated loads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109921432A true CN109921432A (en) | 2019-06-21 |
| CN109921432B CN109921432B (en) | 2021-01-05 |
Family
ID=66977798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910314097.6A Active CN109921432B (en) | 2019-04-18 | 2019-04-18 | Comprehensive reactive power voltage regulation compensation device for power distribution network with tail end concentrated loads |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109921432B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060723A (en) * | 1990-10-08 | 1992-04-29 | 徐福海 | Power factory monitoring method and device |
| CN1710772A (en) * | 2005-06-16 | 2005-12-21 | 上海交通大学 | High-voltage network high-capacity powerfree compensation continuous regulation method |
| WO2012100831A1 (en) * | 2011-01-27 | 2012-08-02 | Alstom Technology Ltd | Circuit breaker apparatus |
| CN104218593A (en) * | 2014-09-26 | 2014-12-17 | 国家电网公司 | Series capacitor compensation device for power distribution network |
-
2019
- 2019-04-18 CN CN201910314097.6A patent/CN109921432B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060723A (en) * | 1990-10-08 | 1992-04-29 | 徐福海 | Power factory monitoring method and device |
| CN1710772A (en) * | 2005-06-16 | 2005-12-21 | 上海交通大学 | High-voltage network high-capacity powerfree compensation continuous regulation method |
| WO2012100831A1 (en) * | 2011-01-27 | 2012-08-02 | Alstom Technology Ltd | Circuit breaker apparatus |
| CN104218593A (en) * | 2014-09-26 | 2014-12-17 | 国家电网公司 | Series capacitor compensation device for power distribution network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109921432B (en) | 2021-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102097793B (en) | Multi-current converter unified power quality conditioning device for power distribution system | |
| CN104009537A (en) | Box-type substation for switching between main power source and standby power source | |
| CN104734161B (en) | Variable series-connection reactance dynamic voltage-adjustment reactive compensation method and device | |
| CN103606933A (en) | Reactive capacitor compensation cabinet | |
| CN202474863U (en) | Low voltage filtering type dynamic reactive power compensation device | |
| CN206673592U (en) | A kind of comprehensive compensation type alternating current steady voltage plug | |
| Sham et al. | Development of adaptive distance relay for STATCOM connected transmission line | |
| CN201048291Y (en) | Parallel high voltage dynamic reactive compensator | |
| CN103326373B (en) | Control method of dynamic reactive power compensation device suitable for multi-direct-current feed-in power grid | |
| CN104767191A (en) | Converter grounding system | |
| CN204681098U (en) | A kind of novel dynamic voltage adjustment reactive power compensation topology | |
| CN207939211U (en) | Distributed power generation pressure regulation filtering system | |
| CN201247961Y (en) | Mobile dynamic compensator for reactive harmonious wave | |
| CN108667038B (en) | Starting method of high-voltage SVG (static var generator) and ice melting device with low impact current | |
| CN200969518Y (en) | Transformer station voltage front-and-back reactive automatic regulation device | |
| CN203491701U (en) | Harmonic-resistant intelligent integrated power capacitor | |
| CN109921432A (en) | A kind of power distribution network synthesis for end concentrated load is idle voltage regulating compensating device | |
| CN105552927A (en) | Parallel compensation system and method for preventing commutation failure of DC power transmission system | |
| CN206517068U (en) | A kind of adjustable serial compensation system | |
| CN202002981U (en) | General test model of flexible AC power transmission FACTS device | |
| CN201667540U (en) | Electromagnetic reactance dynamic reactive compensation device | |
| CN204464987U (en) | A kind of converter grounding system | |
| CN210669141U (en) | Skid-mounted distribution equipment | |
| CN203933147U (en) | A kind of box-type substation that switches main power supply | |
| CN203553955U (en) | Reactive capacitance compensation cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |