CN214674360U - Generator load control system - Google Patents

Generator load control system Download PDF

Info

Publication number
CN214674360U
CN214674360U CN202022600834.XU CN202022600834U CN214674360U CN 214674360 U CN214674360 U CN 214674360U CN 202022600834 U CN202022600834 U CN 202022600834U CN 214674360 U CN214674360 U CN 214674360U
Authority
CN
China
Prior art keywords
load
generator
control system
load controller
load control
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.)
Active
Application number
CN202022600834.XU
Other languages
Chinese (zh)
Inventor
钱钊钏
刘世水
吴志学
王俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Mobile Communications Group Co Ltd
China Mobile Group Chongqing Co Ltd
Original Assignee
China Mobile Communications Group Co Ltd
China Mobile Group Chongqing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Mobile Communications Group Co Ltd, China Mobile Group Chongqing Co Ltd filed Critical China Mobile Communications Group Co Ltd
Priority to CN202022600834.XU priority Critical patent/CN214674360U/en
Application granted granted Critical
Publication of CN214674360U publication Critical patent/CN214674360U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/248—UPS systems or standby or emergency generators

Landscapes

  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The utility model discloses a generator load control system, including a plurality of frame switches, the frame switch is used for controlling the break-make in each shut, still includes load controller, load controller detects the harmonic component of the electric current in each shut harmonic component when exceeding the predetermined value, controls the shut that the frame switch disconnection corresponds. The utility model discloses can detect the electric current in the power supply shunt, judge the great nonlinear load of electric current, when the commercial power is unusual, break off these nonlinear loads, guarantee the continuous work of important equipment.

Description

Generator load control system
Technical Field
The utility model relates to a power supply technical field, concretely relates to generator load control system.
Background
In the communication industry, in order to ensure that the electric equipment can continuously work when the commercial power is abnormal, a standby motor, such as a diesel generator, is usually provided, as shown in fig. 1, an ATS dual-power automatic transfer switch is arranged in a power supply circuit, and when the commercial power is abnormal, the power supply can be quickly switched to the generator for supplying power.
The rated load capacity of the diesel generator refers to linear load capacity, but a large number of nonlinear loads exist in the communication industry, so that the diesel generator cannot operate according to the rated load and can only be used in a capacity reduction mode. But because the nonlinear load is difficult to measure, and the service life of the generator is increased, the capacity of the generator is reduced, so that the generator is overloaded and crashed when the load is not increased.
The overload and downtime of the generator can cause the total power failure of the rear-end service of the generator. In order to solve the problem and improve the safety of a power supply system, the existing technical means is to greatly improve the redundancy degree of the capacity of the generator, but the redundancy degree also causes resource waste.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model aims to provide a generator load control system can detect the electric current in the power supply shunt, judges the great nonlinear load of electric current, and when the commercial power is unusual, breaks off these nonlinear loads, guarantees the continuous work of important equipment.
In order to realize the technical purpose, the utility model discloses a following technical scheme:
a generator load control system comprises a plurality of frame switches and a load controller, wherein the frame switches are used for controlling the on-off of each shunt circuit, the load controller detects the harmonic component of the current of each shunt circuit, and when the harmonic component exceeds a preset value, the frame switches are controlled to disconnect the corresponding shunt circuit.
Optionally, the formula of the current is I ═ a + Bsin (kt + θ);
the I is current, the A is direct current component, the B is amplitude of harmonic wave, the k is angular frequency, the t is time, and the theta is initial phase.
Optionally, an input module is arranged in the load controller, and a maximum limit of a sum of a, a maximum limit of a sum of B, and a white list of importance degrees of the branches of each branch are set by the input module, where the white list is a branch that is not powered off.
Optionally, the load controller collects four sets of time t and current I of each branch circuit at a frequency greater than 100Hz to calculate the parameters A, B, k, θ.
Optionally, the control process of the load controller includes the following steps:
step 1, starting operation;
step 2, acquiring the limit value of the sum A and the limit value of the sum B;
step 3, acquiring a white list of the frame switch;
step 4, calculating A and B of n frame switches;
step 5, if the sum of B exceeds the limit, B maximum shunt circuit i of a non-white list is obtained, and the frame switch of the shunt circuit i is controlled to trip;
and 6, if the sum B is not out of limit, if the sum A is out of limit, acquiring the maximum shunt circuit i of the non-white list A, and controlling the frame switch of the shunt circuit i to trip.
Optionally, a control module is arranged in the load controller, a driving module is electrically connected to the control module, and the driving module drives the frame switch to be turned on or off.
Optionally, a current detector is disposed in the load controller, and the current detector is a multi-channel alternating current collector.
Optionally, the frame switch is an electromagnetic switch.
Optionally, the input module is a physical keyboard or a virtual keyboard.
Optionally, when the shunt circuit is powered by the mains supply, the load controller does not operate.
Optionally, the load controller issues an alarm signal when the generator reaches a maximum load.
According to the above technical scheme, the utility model has the advantages of it is following:
the utility model discloses to the generator system who uses in the communication machine building, install load controller additional, through the current value of each shut of load controller monitoring to calculate its harmonic component. Before the harmonic component exceeds the standard and causes the breakdown of the generator, the frame switch is controlled to trip, the load is reduced, the normal operation of the generator is maintained, and an alarm is given, so that the generator can be maintained to work under the maximum load, and the large-area load power failure caused by the breakdown of the generator is prevented.
The utility model discloses based on the current harmonic detects, prevent that active power, reactive power from surpassing generator working range, be fit for adding the generator that uses in the communication trade and use.
Drawings
FIG. 1 is a schematic diagram of a prior art communications load power supply circuit;
fig. 2 is a schematic diagram of a communication load power supply circuit according to an embodiment of the present invention;
fig. 3 is a control flow chart of the load controller according to the embodiment of the present invention;
fig. 4 is a control flow chart of the load controller according to the embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a load controller according to an embodiment of the present invention.
Detailed Description
For better understanding of the purpose, structure and function of the present invention, the following description will be made in detail with reference to the accompanying drawings.
As shown in fig. 2 and 5, the present invention discloses a generator load control system, which includes a plurality of frame switches, the frame switches are used for controlling the on/off of each shunt, and further includes a load controller, the load controller detects the current of each shunt, calculates the harmonic component of the current, and controls the frame switches to disconnect the corresponding shunt when the harmonic component exceeds a predetermined value. Therefore, the generator can be maintained to work under the maximum load, and large-area load outage caused by the breakdown of the generator can be prevented.
The formula of the current is I ═ a + B sin (kt + θ);
i is the current, a is the dc component, B is the amplitude of the harmonic, k is the angular frequency, t is the time, and θ is the initial phase.
The rated load capacity of the diesel generator refers to a linear load capacity, namely, B is 0 in the current formula. But the larger the harmonics, i.e. B, the greater the discount of the output capacity of the generator from the rated capacity. Due to the existence of a large number of nonlinear loads in the communication industry, the capacity of the generator is utilized to the maximum extent, only the value B can be controlled within the safety value of the operation of the generator, and meanwhile, the value A is also required to be controlled within the safety value of the operation of the generator so as to reduce the load current and maintain the operation of the generator under the maximum load.
The load controller is provided with an input module, and the input module is used for setting the maximum limit value of the sum A, the maximum limit value of the sum B and a shunt importance degree white list of each shunt, wherein the white list is a shunt without power failure. When the generator is used for supplying power, the loads in the white list can be guaranteed to work continuously preferentially, and the loads in the non-white list can be shut down.
The load controller collects four groups of time t and current I of each branch circuit at the frequency of more than 100Hz to calculate parameters A, B, k and theta.
As shown in fig. 3, the control process of the load controller includes the following steps:
step 1, starting operation;
step 2, acquiring the limit value of the sum A and the limit value of the sum B;
step 3, acquiring a white list of the frame switch;
step 4, calculating A and B of n frame switches;
step 5, if the sum of B exceeds the limit, B maximum shunt circuit i of a non-white list is obtained, and the frame switch of the shunt circuit i is controlled to trip;
and 6, if the sum B is not out of limit, if the sum A is out of limit, acquiring the maximum shunt circuit i of the non-white list A, and controlling the frame switch of the shunt circuit i to trip.
As shown in fig. 4, B for each branch is calculated, as is a.
When the generator is supplying power, the load controller starts to operate. The controller obtains the maximum limit for the sum of the values of shunts A, B set by the maintenance personnel. The load controller monitors the current in each branch and calculates the current A, B value for each branch. And if the sum of the B exceeds the maximum limit value of the sum of the B value set by the maintenance personnel, judging that the load of the generator exceeds the limit. The controller obtains a branch importance degree white list, and disconnects the branch with the maximum value B in the non-important load according to the importance degree so as to reduce the load current and maintain the operation of the generator under the maximum load. If the sum of A exceeds the limit, the shunt of the A maximum in the non-important load is also disconnected to reduce the load current and maintain the generator to operate at the maximum load.
As shown in fig. 5, a control module is disposed in the load controller, and a driving module is electrically connected to the control module and drives the frame switch to be turned on or off. The driving module is a circuit module and can drive the electromagnet in the frame switch to work.
The load controller is internally provided with a current detector which is a multi-channel alternating current collector and can collect the current of each branch, and the current is detected by using a Hall sensor type or an optical sensor type.
The frame switch is an electromagnetic switch, an electromagnet is arranged in the frame switch, and the on-off of the frame switch can be controlled remotely.
The input module is a physical keyboard or a virtual keyboard, and if the virtual keyboard is adopted, the load controller needs to be provided with a touch screen.
Specifically, the control module is responsible for receiving signals of the input module and the current detector, and according to the control flow of fig. 3, the frame switch is driven to be switched off through the driving module, so that the output current of the generator is reduced, and the stable work of the generator is ensured. The current detector detects the current flowing through the frame switch, and the control module calculates the load size of the rear end of the switch through the current.
Preferably, the load controller is not operated when the shunt circuit is supplied with mains power. Since the utility power is usually not load-dependent, no load control is necessary at this time. The load controller can obtain a signal of which power supply type through an ATS dual-power automatic transfer switch so as to judge whether to work or not.
When the generator reaches the maximum load, the load controller sends out an alarm signal to prompt a worker not to add the load to the generator, the alarm signal can be in an acoustic/optical alarm type, and the load controller is internally provided with an alarm of a corresponding type and electrically connected with the control module.
According to the technical scheme, the generator load control system in the embodiment has the following advantages:
the load control system is additionally provided with a load controller aiming at a generator system used in a communication machine building. The current value of each shunt is monitored by a load controller, and the harmonic component of each shunt is calculated. And before the harmonic component exceeds the standard and causes the shutdown of the generator, the frame switch is controlled to trip, the load is reduced, the normal operation of the generator is maintained, and an alarm is given. Therefore, the generator can be maintained to work under the maximum load, and large-area load outage caused by the breakdown of the generator can be prevented.
The load control system is based on current harmonic detection, prevents active power and reactive power from exceeding the working range of the generator, and is suitable for being additionally arranged on the generator used in the communication industry.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (7)

1. A generator load control system comprises a plurality of frame switches, wherein the frame switches are used for controlling the on-off of each shunt circuit, and the generator load control system is characterized by further comprising a load controller, the load controller detects the harmonic component of the current of each shunt circuit, a current detector is arranged in the load controller, the current detector is a multi-channel alternating current collector, and when the harmonic component exceeds a preset value, the frame switches are controlled to disconnect the corresponding shunt circuits.
2. The generator load control system of claim 1, wherein the load controller comprises a control module, and a driving module is electrically connected to the control module and drives the frame switch to turn on or off.
3. The generator load control system of claim 1, wherein the frame switch is an electromagnetic switch.
4. The generator load control system according to claim 1, wherein an input module is provided in the load controller, and a maximum limit of harmonic components of each branch and a branch importance degree white list are set through the input module, wherein the white list is a branch without power failure.
5. The generator load control system of claim 4, wherein the input module is a physical keyboard or a virtual keyboard.
6. The generator load control system of claim 1, wherein the load controller collects four sets of harmonic components for each shunt circuit at frequencies greater than 100 Hz.
7. The generator load control system of any of claims 1-6, wherein the load controller is not operational when the shunt is supplied with mains power.
CN202022600834.XU 2020-11-11 2020-11-11 Generator load control system Active CN214674360U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022600834.XU CN214674360U (en) 2020-11-11 2020-11-11 Generator load control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022600834.XU CN214674360U (en) 2020-11-11 2020-11-11 Generator load control system

Publications (1)

Publication Number Publication Date
CN214674360U true CN214674360U (en) 2021-11-09

Family

ID=78445226

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022600834.XU Active CN214674360U (en) 2020-11-11 2020-11-11 Generator load control system

Country Status (1)

Country Link
CN (1) CN214674360U (en)

Similar Documents

Publication Publication Date Title
CN113315111A (en) Power supply method and power supply system
KR100743560B1 (en) The hi-efficiency uninterruptible inverter
CN104828658A (en) Control system for construction elevator
CN105689160A (en) Stopping method and device for magnetic suspension centrifugal machine
CN214799407U (en) Photovoltaic system, photovoltaic module and local manager
CN104269874B (en) A kind of electric control system
CN214622949U (en) Testing arrangement suitable for direct current breaker with electronic control board
CN214674360U (en) Generator load control system
CN102832798B (en) One powers on buffer control circuit and control method thereof
CN115009949B (en) Elevator star-sealing state detection method
CN112583113A (en) Intelligent power supply management system
CN116961081A (en) MCC bus voltage lifting control system and control method for variable frequency electric drive drilling machine
CN1674387A (en) Method and system for preventing electric network from collapsing
CN215326234U (en) Elevator control system and elevator
CN206771871U (en) Air cooling blower fan control system
CN219304714U (en) Power supply system and power supply device
CN214010387U (en) Frequency converter processing system
CN215911904U (en) Mutual backup control system for direct-current power supply modules
CN104701872A (en) Power control system
CN217789290U (en) Voltage monitoring device for frequency conversion and speed regulation electrical system of electric shovel and electric shovel
CN215222138U (en) Photovoltaic system
CN217216091U (en) Power supply device for control power supply of low-voltage frequency converter
CN212875397U (en) A pass through control circuit for unusual voltage
CN104753323B (en) A kind of frequency converter, frequency converter control method and control device
CN217769936U (en) Fan control system with frequency conversion redundancy function

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant