CN103186130B - The EMS of power transmission state monitoring solar power supply unit and method - Google Patents

Abstract

The invention belongs to the technical field of power system communication, and relates to an energy management system and method for monitoring the state of a transmission line for solar power supply equipment, and in particular to an energy management system and method for monitoring the state of a transmission line for solar power supply equipment. The system includes a solar charge and discharge controller and the loads connected to it, solar panels and batteries; the solar charge and discharge controller includes a state control circuit and a Beidou system module connected in sequence, and the solar charge is realized through the state control circuit in the solar charge and discharge controller. The discharge controller switches between the three states of normal state, abnormal state and dormant state; through the Beidou system module, it accepts the unified timing and control of the Beidou system, so that it can cut off the load at the same time to save power, and at the same time turn on the load for data collection and data transfer. The invention makes the entire power transmission line state monitoring system work periodically and achieves the purpose of reducing the average power consumption of the system.

Description

Energy management system and method for transmission line status monitoring solar power supply equipment

technical field

The invention belongs to the technical field of power system communication, and relates to an energy management system and method for monitoring the state of a transmission line for solar power supply equipment, and in particular to an energy management system and method for monitoring the state of a transmission line for solar power supply equipment.

Background technique

The transmission line status monitoring system includes the main station of the system, the communication network and the monitoring terminal. The monitoring terminal can monitor various useful status information of the transmission line and transmit them to the main station of the system through the communication network. Monitoring terminals and communication equipment are located on transmission line towers, which are generally powered by solar power. Because the power supply capacity of the solar power supply method is limited, the average power consumption of the monitoring terminal and communication network equipment is required to be very low, otherwise the solar power supply system will be very large and the cost will also increase greatly. The design of low power consumption is necessary for the monitoring terminal and communication equipment used for transmission line status monitoring, but the effect of low power design is limited. In order to reduce the average power consumption of monitoring terminal and communication equipment, only reasonable Consider the solution from the perspective of planning its working time.

Since the transmission line status monitoring business transmission often does not work continuously for 24 hours, but collects and transmits the status every specific time, so communication equipment and monitoring terminals can use reasonable energy management mechanisms to sleep and cycle sex work. However, it is difficult to synchronize the dormancy and periodic work of communication equipment with monitoring terminals, and the energy management mechanisms between communication equipment and monitoring terminals of different manufacturers are also different. In order to better solve the problem of energy management, the best solution is to apply the energy management mechanism to the power supply equipment in the transmission line status monitoring system. Communication equipment and monitoring terminals are both loads of power supply equipment, so consider from the system level Energy management mechanism can achieve better results.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide an energy management system for monitoring the state of transmission lines for solar power supply equipment, and another purpose is to provide an energy management method for monitoring the state of transmission lines for solar power supply equipment. Consider the energy management method at the level, and apply the energy management method to the power supply equipment in the transmission line status monitoring system, so that the entire transmission line status monitoring system works periodically to achieve the purpose of reducing the average power consumption of the system.

The object of the present invention is to adopt following technical scheme to realize:

An energy management system for power transmission line state monitoring solar powered equipment, the improvement of which is that the system includes a solar charge and discharge controller, a load connected thereto, a solar panel, and a storage battery;

The solar charging and discharging controller includes a state control circuit and a Beidou system module connected in sequence.

Preferably, the state control circuit is used for switching between the normal state, the abnormal state and the dormant state of the solar charge and discharge controller, including a voltage detection circuit and two switching circuits respectively connected thereto; the voltage detection circuit is used to detect the The voltage state provides data for circuit switching; the two switching circuits perform autonomous switching according to voltage detection results;

The voltage detection circuit is connected to the load and sends a control signal to the load; one of the switching circuits is connected to the solar panel and the load respectively, and the other switching circuit is connected to the storage battery and the load respectively, and information is exchanged between the two switching circuits;

More preferably, the state control circuit includes information flow and power flow; wherein the power flow charges the storage battery through the solar panel, and the storage battery provides energy for the state control circuit and load; the information flow is sent to the switching circuit according to the result of voltage detection Instructions are provided to switch between different states.

Preferably, the Beidou system module is a communication terminal module based on the Beidou system, which takes effect when the solar charge and discharge controller works in a normal state, and is used for the transmission line state monitoring system (the state monitoring system is a kind of power application system with a relatively large scale Large, including the main station, communication network and sensors, installed along the transmission line) solar power supply equipment for time service, unified control and management, so that it can cut off the load at the same time, and put the load into data collection and data transmission at the same time.

The present invention provides an energy management method for power transmission line status monitoring solar power supply equipment based on another purpose. The improvement is that the method includes the following steps:

(1) The solar charge and discharge controller works in a normal state, and when the battery voltage is lower than V1, the solar charge and discharge controller enters an abnormal state, and turns to step (2);

(2) The solar charge and discharge controller is working in an abnormal state. When the battery voltage is lower than V2, the solar charge and discharge controller enters the dormant state and turns to step (3);

(3) The solar charge and discharge controller enters the dormant state, short-circuit the solar panel and the battery, and charge the battery. When the battery voltage rises above V3, turn to step (4);

(4) The solar charge and discharge controller enters an abnormal state, and the battery continues to receive the electric energy generated by the solar energy for storage. When the battery voltage rises above V4, turn to step (5);

(5) The solar charge and discharge controller enters the normal state, transmits instructions through the Beidou system and immediately or regularly cuts off and puts the load into operation.

Preferably, in the step (1), when the solar charge and discharge controller is working in a normal state, the solar charge and discharge controller independently manages the charge and discharge electricity, and receives the timing signal of the Beidou system through the Beidou system module to perform time synchronization, Use the local clock to maintain the accuracy of the real-time clock between two time service (generally 24 hours), transmit instructions through the Beidou system and immediately or regularly cut off and put into operation the load. Due to insufficient sunshine, the battery voltage drops due to insufficient electricity. The solar charge and discharge controller enters into an abnormal state when the battery voltage is lower than V1, and turns to step (2).

Preferably, in the step (2), when the solar charge and discharge controller is working in an abnormal state, the solar charge and discharge controller independently manages the charge and discharge electricity, and receives the timing signal of the Beidou system through the Beidou system module to perform time synchronization, The local clock is used to maintain the accuracy of the real-time clock between two time services (usually 24 hours). At this time, due to insufficient power, the load is forcibly cut off by the state control circuit in the solar charge and discharge controller, and the command cannot be transmitted through the Beidou system. Immediately or regularly cut off and put into operation the load, when the battery voltage further drops below V2, the solar charge and discharge controller enters the dormant state and turns to step (3).

Preferably, in the step (3), when the solar charge and discharge controller enters the dormant state, the state control circuit of the solar charge and discharge controller works, the Beidou system module stops working, short-circuits the solar panel and the battery and connects the battery Carry out charging, when the charging makes the battery voltage rise above V3, turn to step (4).

Preferably, in the step (4), when the solar charge and discharge controller enters an abnormal state, the solar charge and discharge controller independently manages the charge and discharge electricity, and receives the timing signal of the Beidou system through the Beidou system module to perform time synchronization, but Since the power is still insufficient and the load is cut off, it is impossible to transmit instructions through the Beidou system and immediately or regularly cut off and put into operation the load. The battery continues to receive the electric energy generated by the solar energy for storage. When the battery voltage further rises above V4, Go to step (5).

Preferably, in the step (5), when the solar charge and discharge controller enters the normal state, the solar charge and discharge controller works normally, and independently manages the charge and discharge electricity, and receives the timing signal of the Beidou system through the Beidou system module. For time synchronization, the local clock is used to maintain the accuracy of the real-time clock between two time services (usually 24 hours), and the command is transmitted through the Beidou system, and the load is cut off and put into operation immediately or regularly.

Compared with prior art, the beneficial effect that the present invention reaches is:

(1) Realized communication network system-level dormancy:

Through the time service and unified control and management of the solar power supply equipment in the transmission line status monitoring system, it can cut off the load at the same time to save power, and at the same time put the load on for data collection and data transmission, which solves the communication network system level problem very well. Hibernation problem.

(2) Improved system stability:

The invention applies the energy management mechanism to the solar power supply equipment in the transmission line state monitoring system, so that the entire transmission line state monitoring system works periodically, thereby reducing the average power consumption of the system, reducing the system's investment in power supply equipment, and extending During the working hours of the system, regular switching of the load also overcomes the crash phenomenon of some equipment due to electromagnetic interference and other reasons, which is conducive to improving the stability of the entire system.

(3) Simplify the design of communication equipment and network:

Transferring the complex dormancy wake-up and energy management mechanism in the communication system to the solar power supply device simplifies the complex design of the communication device and network, and also has a good effect.

(4) Save energy consumption of the whole system:

The Beidou system module can function when the solar charge and discharge controller is working in a normal state. Through the Beidou system, the solar power supply equipment in the transmission line status monitoring system can be timed and unifiedly controlled and managed, so that it can cut off the load at the same time to save power, and at the same time put the load on for data collection and data transmission. In this way, each monitoring terminal and communication equipment in the entire transmission line status monitoring system can be highly consistent through the control of the solar power supply system, and work periodically and under control to achieve the purpose of saving energy and reducing consumption.

Description of drawings

Fig. 1 is the system structure block diagram of the transmission line status monitoring solar power supply equipment provided by the present invention;

Fig. 2 is the state transition and functional block diagram of the transmission line state monitoring solar power supply equipment provided by the present invention;

Fig. 3 is the system structure and connection diagram of the state control circuit provided by the present invention;

Fig. 4 is a flow chart of the energy management method of the transmission line state monitoring solar power supply equipment provided by the present invention.

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

The present invention provides an energy management system for power transmission line state monitoring solar power supply equipment, as shown in Figure 1, which includes two parts: the first part is the state control circuit in the solar charge and discharge controller, and the state control circuit is composed of The core circuit composed of analog devices can ensure that the solar charge and discharge controller can switch between normal state, abnormal state and sleep state; the second part is the Beidou system module in the solar charge and discharge controller, which is based on the domestic Beidou system The advanced communication terminal module ensures that the solar charge and discharge controller can perform system timing and load switching operations under the control of the Beidou system. The Beidou system is a global satellite positioning and communication system (BDS) developed by China itself. It is the third mature satellite navigation system after the US Global Positioning System (GPS) and Russia's GLONASS. The Beidou system is composed of a space terminal, a ground terminal and a user terminal. It can provide all kinds of users with high-precision and high-reliability positioning, navigation, and timing services around the world, all-weather, and has short-message communication capabilities. Capable of regional navigation, positioning and timing, the positioning accuracy is better than 20m, and the timing accuracy is better than 100ns. The state control circuit is connected to the Beidou system module, and the two-way information exchange between the two is conducive to more efficient energy management. In addition, the energy management system also includes several loads, solar panels, and storage batteries that are respectively connected to the solar charge and discharge controller.

Among them, the Beidou system module can function when the solar charge and discharge controller works in a normal state. Through the Beidou system, the solar power supply equipment in the transmission line status monitoring system can be timed and unifiedly controlled and managed, so that it can cut off the load at the same time to save power, and at the same time put the load on for data collection and data transmission. The state transition and functional block diagram of the transmission line state monitoring solar power supply equipment provided by the present invention are shown in FIG. 2 .

The solar charge-discharge controller can switch between normal state, abnormal state and dormant state, and such conversion is realized by the state control circuit in the solar charge-discharge controller. The system structure and connection relationship of the state control circuit provided by the present invention are as follows: As shown in Figure 3, it includes a voltage detection circuit and two switching circuits respectively connected thereto; the voltage detection circuit is used to detect the voltage state of the storage battery and provides data for circuit switching; the two switching circuits perform autonomous switching according to the voltage detection results; The voltage detection circuit is connected to the load and sends a control signal to the load; one of the switching circuits is connected to the solar panel and the load respectively, and the other switching circuit is connected to the battery and the load respectively, and information is exchanged between the two switching circuits.

The state control circuit also includes information flow and power flow; the power flow charges the battery through the solar panel, and the battery provides energy for the state control circuit and the load; the information flow provides instructions to the switching circuit according to the result of voltage detection to realize Toggle between different states.

The energy management method flow chart of the transmission line state monitoring solar power supply equipment provided by the present invention is shown in Figure 4, and the specific management method steps are as follows:

(1) The solar charge and discharge controller works in a normal state. The solar charge and discharge controller independently manages the charge and discharge electricity. It can receive the timing signal of the Beidou system through the Beidou system module for time synchronization, and use the local clock to maintain the real-time clock for a period of time. Accuracy, the command can be transmitted through the Beidou system and the load can be cut off and put into operation immediately or at a fixed time. However, due to insufficient sunshine and other reasons, the battery voltage drops, and the solar charge and discharge controller will enter into the extreme state when the battery voltage is lower than V1. state, go to step (2);

(2) When the solar charge and discharge controller is working in an abnormal state, the solar charge and discharge controller independently manages the charge and discharge electricity, and can receive the timing signal of the Beidou system through the Beidou system module for time synchronization, and use the local clock to complete the timing between the two timings. time (usually 24 hours) to maintain the accuracy of the real-time clock, but at this time due to insufficient power, the load has been forcibly cut off by the state control circuit in the solar charge and discharge controller, and it is impossible to transmit instructions through the Beidou system and cut off and switch off immediately or regularly When the load is applied, when the battery voltage further drops below V2, the solar charge and discharge controller enters a dormant state and turns to step (3);

(3) At this time, the solar charge and discharge controller enters a dormant state, and other parts of the solar charge and discharge controller except the state control circuit stop working, and the Beidou system module also stops working. At this time, only the state control circuit takes effect. The solar panel and the battery are short-circuited for charging. When the battery voltage rises above V3 after charging to a certain extent, turn to step (4);

(4) At this time, the solar charge and discharge controller enters an abnormal state, independently manages the charge and discharge electricity, and receives the timing signal of the Beidou system through the Beidou system module for time synchronization. However, because the power is still insufficient at this time, the load is still in the cut-off state. If the command cannot be transmitted through the Beidou system and the load is immediately or regularly cut off and put into operation, the battery continues to receive the electric energy generated by the solar energy for storage. When the battery voltage further rises above V4, turn to step (5);

(5) At this time, the solar charge and discharge controller enters the normal state, the solar charge and discharge controller works normally, and independently manages the charge and discharge electricity. The Beidou system module receives the timing signal of the Beidou system for time synchronization, and uses the local clock in two times. The accuracy of the real-time clock is maintained between the time service (generally 24 hours), and the command is transmitted through the Beidou system, and the load is cut off and put into operation immediately or regularly.

The invention applies the energy management mechanism to the solar power supply equipment in the transmission line state monitoring system, so that the entire transmission line state monitoring system works periodically, thereby reducing the average power consumption of the system, reducing the system's investment in power supply equipment, and extending The working time of the system improves the stability of the system.

Example

The energy management mechanism provided by the invention can be applied to solar power supply equipment in the power transmission line status monitoring system. For example, in a 12V DC solar power supply system, it includes solar panels, batteries, solar charge and discharge controllers and several loads, as shown in Figure 1. The solar charge and discharge controller can switch between normal state, abnormal state and dormant state, as shown in Figure 2, V1=11V, V2=10V, V3=10.5V, V4=11.5V. In this way, when the solar charge and discharge controller is working in a normal state, the solar charge and discharge controller will enter an abnormal state when the voltage is lower than 11V when the power is insufficient and the voltage drops due to insufficient sunlight. Because various loads with a rated power supply voltage of 12V may not work normally when the voltage is lower than 11V, it is unnecessary to continue to consume power in such a situation; when the voltage is further reduced below 10V, the solar charge and discharge controller Normal work cannot be guaranteed, and the necessity of its work is not strong, so it is a more appropriate choice to enter the sleep state, which can further save power, and protect the battery from low voltage to avoid damage to the battery; when the sun can guarantee , when the solar panel is charging the battery, as the voltage rises, the solar charge and discharge controller will return from the sleep state to the abnormal state when the voltage is greater than 10.5V. Frequent switching between states, the voltage threshold at this time should not be set to 10V, but should be greater than 10V, preferably 10.5V; when the voltage further rises above 11.5V, the solar charge and discharge controller will return to the normal state, The load can be switched on and off according to the command of the master station. For solar power supply systems with different voltage levels, the conversion thresholds V1, V2, V3, and V4 can be flexibly configured according to actual needs. The main principle is to ensure reliable power supply for loads and reduce unnecessary energy consumption.

The Beidou system module can function when the solar charge and discharge controller is working in a normal state. Through the Beidou system, the solar power supply equipment in the transmission line status monitoring system can be timed and unifiedly controlled and managed, so that it can cut off the load at the same time to save power, and at the same time put the load on for data collection and data transmission. In this way, each monitoring terminal and communication equipment in the entire transmission line status monitoring system can be highly consistent through the control of the solar power supply system, and work periodically and under control to achieve the purpose of saving energy and reducing consumption.

The present invention provides an energy management system and method for monitoring the state of a transmission line for solar power supply equipment. The state control circuit in the solar charge and discharge controller realizes the three states of the solar charge and discharge controller: normal state, abnormal state and sleep state. The conversion between them; the Beidou system module in the solar charge and discharge controller accepts the unified timing and control of the Beidou system, so that it can cut off the load at the same time to save power, and at the same time put the load in for data collection and data transmission.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims (2)

1. an EMS for power transmission state monitoring solar power supply unit, described system includes solar charging/discharging controller and connected load respectively, solar panel and accumulator；Described solar charging/discharging controller includes state control circuit；Described state control circuit is changed for solar charging/discharging controller between normal condition, abnormal condition and resting state, including voltage detecting circuit and two switching circuits being connected respectively with it；Voltage detecting circuit, for detecting the voltage status of accumulator, provides data for circuit switching；Said two switching circuit independently switches according to voltage detecting result；

Described voltage detecting circuit is connected with load, sends control signal to load；One of them switching circuit is connected with solar panel and load respectively, and another switching circuit is connected with accumulator and load respectively, and it is mutual to carry out information between two switching circuits；

It is characterized in that, described solar charging/discharging controller includes the dipper system module being connected with state control circuit；

Described state control circuit includes flow of information and flow of power；Wherein flow of power is that accumulator is charged by solar panel, and accumulator provides the energy for state control circuit and provides energy for load；Flow of information provides instruction to switching circuit, to realize the switching between different conditions according to the result of voltage detecting；

Described dipper system module is communication terminal module based on dipper system, have an effect when solar charging/discharging controller is operated in normal condition, solar power supply unit in power transmission state monitoring system is carried out time service, unified control and management, make it cut off load simultaneously, put into load simultaneously and carry out data acquisition and data transmission.

2. the energy management method of a power transmission state monitoring solar power supply unit, it is characterised in that described method comprises the steps:

(1) solar charging/discharging controller is operated in normal condition, and when battery tension is less than V1, solar charging/discharging controller enters into abnormal condition, turns to step (2)；

(2) solar charging/discharging controller is operated in abnormal condition, and when battery tension is less than V2, solar charging/discharging controller enters into resting state, turns to step (3)；

(3) solar charging/discharging controller enters into resting state, by solar panel and accumulator short circuit, and is charged accumulator, when charging makes battery tension be increased to more than V3, turns to step (4)；

(4) solar charging/discharging controller enters into abnormal condition, and accumulator continues to the electric energy of solar energy generation and carries out electric power storage, when battery tension is increased to more than V4, turns to step (5)；

(5) solar charging/discharging controller enters into normal condition, timing turning off and the load that puts into operation even the transmission carrying out instructing by dipper system is existed side by side；

In described step (1), when solar charging/discharging controller is operated in normal condition, solar charging/discharging controller independently carries out discharge and recharge fulgurite reason, and by dipper system module accept the time signal of dipper system carry out pair time, local clock is utilized to maintain real-time clock precision between twice time service, timing turning off and the load that puts into operation even the transmission carrying out instructing by dipper system is existed side by side, owing to deficiency reason at sunshine causes electricity not enough, the voltage of accumulator declines, solar charging/discharging controller enters into abnormal condition when battery tension is less than V1, turn to step (2)；

In described step (2), when solar charging/discharging controller is operated in abnormal condition, solar charging/discharging controller independently carries out discharge and recharge fulgurite reason, and by dipper system module accept the time signal of dipper system carry out pair time, local clock is utilized to maintain real-time clock precision between twice time service, now not enough due to electricity, load is cut off by force by the state control circuit in solar charging/discharging controller, even timing turning off cannot be existed side by side by the transmission that dipper system carries out instructing and put into operation load, when battery tension is further decreased to below V2, solar charging/discharging controller enters into resting state, turn to step (3)；

In described step (3), when solar charging/discharging controller enters into resting state, the state control circuit work of solar charging/discharging controller, dipper system module from service, solar panel and accumulator short circuit and accumulator is charged, when charging makes battery tension be increased to more than V3, turn to step (4)；

In described step (4), when solar charging/discharging controller enters into abnormal condition, solar charging/discharging controller independently carries out discharge and recharge fulgurite reason, by dipper system module accept the time signal of dipper system carry out pair time, but owing to electricity is the most not enough, load is in dissengaged positions, even timing turning off cannot be existed side by side by the transmission that dipper system carries out instructing and put into operation load, accumulator continues to the electric energy of solar energy generation and carries out electric power storage, when battery tension further rises to more than V4, turn to step (5)；

In described step (5), when solar charging/discharging controller enters into normal condition, solar charging/discharging controller normally works, and independently carry out discharge and recharge fulgurite reason, by dipper system module accept the time signal of dipper system carry out pair time, local clock is utilized to maintain real-time clock precision between twice time service, timing turning off and the load that puts into operation even the transmission carrying out instructing by dipper system is existed side by side.